
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz> Reviewed-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Andrew Bartlett <abartlet@samba.org>
4015 lines
100 KiB
C
4015 lines
100 KiB
C
/*
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* Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Portions Copyright (c) 2009 - 2010 Apple Inc. All rights reserved.
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* Portions Copyright (c) 2021, PADL Software Pty Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5_locl.h"
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#include <heimbasepriv.h>
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struct pa_info_data {
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krb5_enctype etype;
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krb5_salt salt;
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krb5_data *s2kparams;
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};
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struct krb5_gss_init_ctx_data {
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krb5_gssic_step step;
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krb5_gssic_finish finish;
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krb5_gssic_release_cred release_cred;
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krb5_gssic_delete_sec_context delete_sec_context;
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const struct gss_OID_desc_struct *mech;
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struct gss_cred_id_t_desc_struct *cred;
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struct {
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unsigned int release_cred : 1;
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} flags;
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};
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struct krb5_get_init_creds_ctx {
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KDCOptions flags;
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krb5_creds cred;
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const krb5_addresses *addrs;
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krb5_enctype *etypes;
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krb5_preauthtype *pre_auth_types;
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char *in_tkt_service;
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unsigned nonce;
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unsigned pk_nonce;
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krb5_data req_buffer;
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AS_REQ as_req;
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int pa_counter;
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/* password and keytab_data is freed on completion */
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char *password;
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krb5_keytab_key_proc_args *keytab_data;
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krb5_pointer *keyseed;
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krb5_s2k_proc keyproc;
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krb5_get_init_creds_tristate req_pac;
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krb5_pk_init_ctx pk_init_ctx;
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krb5_gss_init_ctx gss_init_ctx;
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int ic_flags;
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char *kdc_hostname;
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char *sitename;
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struct {
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unsigned int change_password:1;
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unsigned int change_password_prompt:1;
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unsigned int allow_enc_pa_rep:1;
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unsigned int allow_save_as_reply_key:1;
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} runflags;
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struct pa_info_data paid;
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METHOD_DATA md;
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KRB_ERROR error;
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EncKDCRepPart enc_part;
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krb5_prompter_fct prompter;
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void *prompter_data;
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int warned_user;
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struct pa_info_data *ppaid;
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struct krb5_fast_state fast_state;
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krb5_enctype as_enctype;
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krb5_keyblock *as_reply_key;
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/* current and available pa mechansm in this exchange */
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struct pa_auth_mech *pa_mech;
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heim_array_t available_pa_mechs;
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const char *pa_used;
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struct {
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struct timeval run_time;
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} stats;
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};
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static void
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free_paid(krb5_context context, struct pa_info_data *ppaid)
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{
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krb5_free_salt(context, ppaid->salt);
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if (ppaid->s2kparams)
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krb5_free_data(context, ppaid->s2kparams);
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memset(ppaid, 0, sizeof(*ppaid));
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}
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static krb5_error_code KRB5_CALLCONV
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default_s2k_func(krb5_context context, krb5_enctype type,
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krb5_const_pointer keyseed,
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krb5_salt salt, krb5_data *s2kparms,
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krb5_keyblock **key)
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{
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krb5_error_code ret;
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krb5_data password;
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krb5_data opaque;
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if (_krb5_have_debug(context, 5)) {
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char *str = NULL;
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ret = krb5_enctype_to_string(context, type, &str);
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if (ret)
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return ret;
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_krb5_debug(context, 5, "krb5_get_init_creds: using default_s2k_func: %s (%d)", str, (int)type);
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free(str);
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}
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password.data = rk_UNCONST(keyseed);
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password.length = keyseed ? strlen(keyseed) : 0;
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if (s2kparms)
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opaque = *s2kparms;
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else
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krb5_data_zero(&opaque);
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*key = malloc(sizeof(**key));
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if (*key == NULL)
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return krb5_enomem(context);
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ret = krb5_string_to_key_data_salt_opaque(context, type, password,
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salt, opaque, *key);
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if (ret) {
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free(*key);
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*key = NULL;
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}
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return ret;
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}
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static void
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free_gss_init_ctx(krb5_context context, krb5_gss_init_ctx gssic)
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{
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if (gssic == NULL)
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return;
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if (gssic->flags.release_cred)
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gssic->release_cred(context, gssic, gssic->cred);
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free(gssic);
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}
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static void
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free_init_creds_ctx(krb5_context context, krb5_init_creds_context ctx)
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{
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if (ctx->etypes)
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free(ctx->etypes);
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if (ctx->pre_auth_types)
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free (ctx->pre_auth_types);
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if (ctx->in_tkt_service)
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free(ctx->in_tkt_service);
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if (ctx->keytab_data)
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free(ctx->keytab_data);
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if (ctx->password) {
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size_t len;
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len = strlen(ctx->password);
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memset_s(ctx->password, len, 0, len);
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free(ctx->password);
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}
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free_gss_init_ctx(context, ctx->gss_init_ctx);
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/*
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* FAST state
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*/
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_krb5_fast_free(context, &ctx->fast_state);
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if (ctx->as_reply_key)
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krb5_free_keyblock(context, ctx->as_reply_key);
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krb5_data_free(&ctx->req_buffer);
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krb5_free_cred_contents(context, &ctx->cred);
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free_METHOD_DATA(&ctx->md);
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free_EncKDCRepPart(&ctx->enc_part);
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free_KRB_ERROR(&ctx->error);
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free_AS_REQ(&ctx->as_req);
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heim_release(ctx->available_pa_mechs);
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heim_release(ctx->pa_mech);
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ctx->pa_mech = NULL;
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free(ctx->kdc_hostname);
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free(ctx->sitename);
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free_paid(context, &ctx->paid);
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memset_s(ctx, sizeof(*ctx), 0, sizeof(*ctx));
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}
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static krb5_deltat
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get_config_time (krb5_context context,
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const char *realm,
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const char *name,
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int def)
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{
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krb5_deltat ret;
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ret = krb5_config_get_time (context, NULL,
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"realms",
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realm,
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name,
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NULL);
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if (ret >= 0)
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return ret;
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ret = krb5_config_get_time (context, NULL,
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"libdefaults",
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name,
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NULL);
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if (ret >= 0)
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return ret;
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return def;
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}
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static krb5_error_code
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init_cred (krb5_context context,
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krb5_creds *cred,
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krb5_principal client,
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krb5_deltat start_time,
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krb5_get_init_creds_opt *options)
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{
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krb5_error_code ret;
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krb5_deltat tmp;
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krb5_timestamp now;
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krb5_timeofday (context, &now);
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memset (cred, 0, sizeof(*cred));
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if (client)
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ret = krb5_copy_principal(context, client, &cred->client);
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else
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ret = krb5_get_default_principal(context, &cred->client);
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if (ret)
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goto out;
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if (start_time)
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cred->times.starttime = now + start_time;
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if (options->flags & KRB5_GET_INIT_CREDS_OPT_TKT_LIFE)
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tmp = options->tkt_life;
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else
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tmp = KRB5_TKT_LIFETIME_DEFAULT;
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cred->times.endtime = now + tmp;
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if ((options->flags & KRB5_GET_INIT_CREDS_OPT_RENEW_LIFE)) {
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if (options->renew_life > 0)
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tmp = options->renew_life;
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else
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tmp = KRB5_TKT_RENEW_LIFETIME_DEFAULT;
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cred->times.renew_till = now + tmp;
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}
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return 0;
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out:
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krb5_free_cred_contents (context, cred);
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return ret;
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}
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/*
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* Print a message (str) to the user about the expiration in `lr'
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*/
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static void
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report_expiration (krb5_context context,
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krb5_prompter_fct prompter,
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krb5_data *data,
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const char *str,
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time_t now)
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{
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char *p = NULL;
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if (asprintf(&p, "%s%s", str, ctime(&now)) < 0 || p == NULL)
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return;
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(*prompter)(context, data, NULL, p, 0, NULL);
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free(p);
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}
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/*
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* Check the context, and in the case there is a expiration warning,
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* use the prompter to print the warning.
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*
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* @param context A Kerberos 5 context.
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* @param options An GIC options structure
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* @param ctx The krb5_init_creds_context check for expiration.
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*/
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krb5_error_code
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krb5_process_last_request(krb5_context context,
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krb5_get_init_creds_opt *options,
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krb5_init_creds_context ctx)
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{
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LastReq *lr;
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size_t i;
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/*
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* First check if there is a API consumer.
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*/
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lr = &ctx->enc_part.last_req;
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if (options && options->opt_private && options->opt_private->lr.func) {
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krb5_last_req_entry **lre;
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lre = calloc(lr->len + 1, sizeof(*lre));
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if (lre == NULL)
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return krb5_enomem(context);
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for (i = 0; i < lr->len; i++) {
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lre[i] = calloc(1, sizeof(*lre[i]));
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if (lre[i] == NULL)
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break;
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lre[i]->lr_type = lr->val[i].lr_type;
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lre[i]->value = lr->val[i].lr_value;
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}
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(*options->opt_private->lr.func)(context, lre,
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options->opt_private->lr.ctx);
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for (i = 0; i < lr->len; i++)
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free(lre[i]);
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free(lre);
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}
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return krb5_init_creds_warn_user(context, ctx);
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}
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/**
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* Warn the user using prompter in the krb5_init_creds_context about
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* possible password and account expiration.
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*
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* @param context a Kerberos 5 context.
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* @param ctx a krb5_init_creds_context context.
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*
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* @return 0 for success, or an Kerberos 5 error code, see krb5_get_error_message().
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* @ingroup krb5_credential
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*/
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_init_creds_warn_user(krb5_context context,
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krb5_init_creds_context ctx)
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{
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krb5_timestamp sec;
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krb5_const_realm realm;
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krb5_enctype weak_enctype = KRB5_ENCTYPE_NULL;
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LastReq *lr;
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unsigned i;
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time_t t;
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if (ctx->prompter == NULL)
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return 0;
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if (ctx->warned_user)
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return 0;
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ctx->warned_user = 1;
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krb5_timeofday (context, &sec);
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realm = krb5_principal_get_realm (context, ctx->cred.client);
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lr = &ctx->enc_part.last_req;
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t = sec + get_config_time (context,
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realm,
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"warn_pwexpire",
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7 * 24 * 60 * 60);
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for (i = 0; i < lr->len; ++i) {
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if (lr->val[i].lr_value <= t) {
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switch (lr->val[i].lr_type) {
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case LR_PW_EXPTIME :
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report_expiration(context, ctx->prompter,
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ctx->prompter_data,
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"Your password will expire at ",
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lr->val[i].lr_value);
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break;
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case LR_ACCT_EXPTIME :
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report_expiration(context, ctx->prompter,
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ctx->prompter_data,
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"Your account will expire at ",
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lr->val[i].lr_value);
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break;
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default:
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break;
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}
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}
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}
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if (krb5_is_enctype_weak(context, ctx->as_enctype))
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weak_enctype = ctx->as_enctype;
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else if (krb5_is_enctype_weak(context, ctx->cred.session.keytype))
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weak_enctype = ctx->cred.session.keytype;
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if (ctx->prompter && weak_enctype != KRB5_ENCTYPE_NULL) {
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int suppress = krb5_config_get_bool_default(context, NULL, false,
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"libdefaults",
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"suppress_weak_enctype", NULL);
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if (!suppress) {
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char *str = NULL, *p = NULL;
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int aret;
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(void) krb5_enctype_to_string(context, weak_enctype, &str);
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aret = asprintf(&p, "Encryption type %s(%d) used for authentication is weak and will be deprecated",
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str ? str : "unknown", weak_enctype);
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if (aret >= 0 && p) {
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(*ctx->prompter)(context, ctx->prompter_data, NULL, p, 0, NULL);
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free(p);
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}
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free(str);
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}
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}
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return 0;
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}
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|
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static const krb5_addresses no_addrs = { 0, NULL };
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|
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static krb5_error_code
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get_init_creds_common(krb5_context context,
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krb5_principal client,
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krb5_prompter_fct prompter,
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void *prompter_data,
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krb5_deltat start_time,
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krb5_get_init_creds_opt *options,
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krb5_init_creds_context ctx)
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{
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krb5_get_init_creds_opt *default_opt = NULL;
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krb5_error_code ret;
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krb5_enctype *etypes;
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krb5_preauthtype *pre_auth_types;
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|
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memset(ctx, 0, sizeof(*ctx));
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if (options == NULL) {
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const char *realm = krb5_principal_get_realm(context, client);
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ret = krb5_get_init_creds_opt_alloc(context, &default_opt);
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if (ret)
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return ret;
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options = default_opt;
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krb5_get_init_creds_opt_set_default_flags(context, NULL, realm, options);
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}
|
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|
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if (options->opt_private) {
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if (options->opt_private->password) {
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ret = krb5_init_creds_set_password(context, ctx,
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options->opt_private->password);
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if (ret)
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goto out;
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}
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|
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ctx->keyproc = options->opt_private->key_proc;
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ctx->req_pac = options->opt_private->req_pac;
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ctx->pk_init_ctx = options->opt_private->pk_init_ctx;
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ctx->ic_flags = options->opt_private->flags;
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} else
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ctx->req_pac = KRB5_INIT_CREDS_TRISTATE_UNSET;
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|
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if (ctx->keyproc == NULL)
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ctx->keyproc = default_s2k_func;
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|
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if (ctx->ic_flags & KRB5_INIT_CREDS_CANONICALIZE)
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ctx->flags.canonicalize = 1;
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|
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ctx->pre_auth_types = NULL;
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ctx->addrs = NULL;
|
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ctx->etypes = NULL;
|
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ctx->pre_auth_types = NULL;
|
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|
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ret = init_cred(context, &ctx->cred, client, start_time, options);
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if (ret)
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goto out;
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|
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ret = krb5_init_creds_set_service(context, ctx, NULL);
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if (ret)
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goto out;
|
|
|
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if (options->flags & KRB5_GET_INIT_CREDS_OPT_FORWARDABLE)
|
|
ctx->flags.forwardable = options->forwardable;
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|
|
if (options->flags & KRB5_GET_INIT_CREDS_OPT_PROXIABLE)
|
|
ctx->flags.proxiable = options->proxiable;
|
|
|
|
if (start_time)
|
|
ctx->flags.postdated = 1;
|
|
if (ctx->cred.times.renew_till)
|
|
ctx->flags.renewable = 1;
|
|
if (options->flags & KRB5_GET_INIT_CREDS_OPT_ADDRESS_LIST) {
|
|
ctx->addrs = options->address_list;
|
|
} else if (options->opt_private) {
|
|
switch (options->opt_private->addressless) {
|
|
case KRB5_INIT_CREDS_TRISTATE_UNSET:
|
|
#if KRB5_ADDRESSLESS_DEFAULT == TRUE
|
|
ctx->addrs = &no_addrs;
|
|
#else
|
|
ctx->addrs = NULL;
|
|
#endif
|
|
break;
|
|
case KRB5_INIT_CREDS_TRISTATE_FALSE:
|
|
ctx->addrs = NULL;
|
|
break;
|
|
case KRB5_INIT_CREDS_TRISTATE_TRUE:
|
|
ctx->addrs = &no_addrs;
|
|
break;
|
|
}
|
|
}
|
|
if (options->flags & KRB5_GET_INIT_CREDS_OPT_ETYPE_LIST) {
|
|
if (ctx->etypes)
|
|
free(ctx->etypes);
|
|
|
|
etypes = malloc((options->etype_list_length + 1)
|
|
* sizeof(krb5_enctype));
|
|
if (etypes == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto out;
|
|
}
|
|
memcpy (etypes, options->etype_list,
|
|
options->etype_list_length * sizeof(krb5_enctype));
|
|
etypes[options->etype_list_length] = ETYPE_NULL;
|
|
ctx->etypes = etypes;
|
|
}
|
|
if (options->flags & KRB5_GET_INIT_CREDS_OPT_PREAUTH_LIST) {
|
|
pre_auth_types = malloc((options->preauth_list_length + 1)
|
|
* sizeof(krb5_preauthtype));
|
|
if (pre_auth_types == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto out;
|
|
}
|
|
memcpy (pre_auth_types, options->preauth_list,
|
|
options->preauth_list_length * sizeof(krb5_preauthtype));
|
|
pre_auth_types[options->preauth_list_length] = KRB5_PADATA_NONE;
|
|
ctx->pre_auth_types = pre_auth_types;
|
|
}
|
|
if (options->flags & KRB5_GET_INIT_CREDS_OPT_ANONYMOUS)
|
|
ctx->flags.request_anonymous = options->anonymous;
|
|
|
|
ctx->prompter = prompter;
|
|
ctx->prompter_data = prompter_data;
|
|
|
|
if ((options->flags & KRB5_GET_INIT_CREDS_OPT_CHANGE_PASSWORD_PROMPT) &&
|
|
!options->change_password_prompt)
|
|
ctx->runflags.change_password_prompt = 0;
|
|
else
|
|
ctx->runflags.change_password_prompt = ctx->prompter != NULL;
|
|
|
|
out:
|
|
if (default_opt)
|
|
krb5_get_init_creds_opt_free(context, default_opt);
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code
|
|
change_password (krb5_context context,
|
|
krb5_principal client,
|
|
const char *password,
|
|
char *newpw,
|
|
size_t newpw_sz,
|
|
krb5_prompter_fct prompter,
|
|
void *data,
|
|
krb5_get_init_creds_opt *old_options)
|
|
{
|
|
krb5_prompt prompts[2];
|
|
krb5_error_code ret;
|
|
krb5_creds cpw_cred;
|
|
char buf1[BUFSIZ], buf2[BUFSIZ];
|
|
krb5_data password_data[2];
|
|
int result_code;
|
|
krb5_data result_code_string;
|
|
krb5_data result_string;
|
|
char *p;
|
|
krb5_get_init_creds_opt *options;
|
|
|
|
heim_assert(prompter != NULL, "unexpected NULL prompter");
|
|
|
|
memset (&cpw_cred, 0, sizeof(cpw_cred));
|
|
|
|
ret = krb5_get_init_creds_opt_alloc(context, &options);
|
|
if (ret)
|
|
return ret;
|
|
krb5_get_init_creds_opt_set_tkt_life (options, 60);
|
|
krb5_get_init_creds_opt_set_forwardable (options, FALSE);
|
|
krb5_get_init_creds_opt_set_proxiable (options, FALSE);
|
|
if (old_options &&
|
|
(old_options->flags & KRB5_GET_INIT_CREDS_OPT_PREAUTH_LIST))
|
|
krb5_get_init_creds_opt_set_preauth_list(options,
|
|
old_options->preauth_list,
|
|
old_options->preauth_list_length);
|
|
if (old_options &&
|
|
(old_options->flags & KRB5_GET_INIT_CREDS_OPT_CHANGE_PASSWORD_PROMPT))
|
|
krb5_get_init_creds_opt_set_change_password_prompt(options,
|
|
old_options->change_password_prompt);
|
|
|
|
krb5_data_zero (&result_code_string);
|
|
krb5_data_zero (&result_string);
|
|
|
|
ret = krb5_get_init_creds_password (context,
|
|
&cpw_cred,
|
|
client,
|
|
password,
|
|
prompter,
|
|
data,
|
|
0,
|
|
"kadmin/changepw",
|
|
options);
|
|
krb5_get_init_creds_opt_free(context, options);
|
|
if (ret)
|
|
goto out;
|
|
|
|
for(;;) {
|
|
password_data[0].data = buf1;
|
|
password_data[0].length = sizeof(buf1);
|
|
|
|
prompts[0].hidden = 1;
|
|
prompts[0].prompt = "New password: ";
|
|
prompts[0].reply = &password_data[0];
|
|
prompts[0].type = KRB5_PROMPT_TYPE_NEW_PASSWORD;
|
|
|
|
password_data[1].data = buf2;
|
|
password_data[1].length = sizeof(buf2);
|
|
|
|
prompts[1].hidden = 1;
|
|
prompts[1].prompt = "Repeat new password: ";
|
|
prompts[1].reply = &password_data[1];
|
|
prompts[1].type = KRB5_PROMPT_TYPE_NEW_PASSWORD_AGAIN;
|
|
|
|
ret = (*prompter) (context, data, NULL, "Changing password",
|
|
2, prompts);
|
|
if (ret) {
|
|
memset (buf1, 0, sizeof(buf1));
|
|
memset (buf2, 0, sizeof(buf2));
|
|
goto out;
|
|
}
|
|
|
|
if (strcmp (buf1, buf2) == 0)
|
|
break;
|
|
memset (buf1, 0, sizeof(buf1));
|
|
memset (buf2, 0, sizeof(buf2));
|
|
}
|
|
|
|
ret = krb5_set_password (context,
|
|
&cpw_cred,
|
|
buf1,
|
|
client,
|
|
&result_code,
|
|
&result_code_string,
|
|
&result_string);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (asprintf(&p, "%s: %.*s\n",
|
|
result_code ? "Error" : "Success",
|
|
(int)result_string.length,
|
|
result_string.length > 0 ? (char*)result_string.data : "") < 0)
|
|
{
|
|
ret = krb5_enomem(context);
|
|
goto out;
|
|
}
|
|
|
|
/* return the result */
|
|
(*prompter) (context, data, NULL, p, 0, NULL);
|
|
|
|
if (result_code == 0) {
|
|
strlcpy (newpw, buf1, newpw_sz);
|
|
ret = 0;
|
|
} else {
|
|
krb5_set_error_message(context, ret = KRB5_CHPW_FAIL,
|
|
N_("failed changing password: %s", ""), p);
|
|
}
|
|
free (p);
|
|
|
|
out:
|
|
memset_s(buf1, sizeof(buf1), 0, sizeof(buf1));
|
|
memset_s(buf2, sizeof(buf2), 0, sizeof(buf2));
|
|
krb5_data_free (&result_string);
|
|
krb5_data_free (&result_code_string);
|
|
krb5_free_cred_contents (context, &cpw_cred);
|
|
return ret;
|
|
}
|
|
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_keyblock_key_proc (krb5_context context,
|
|
krb5_keytype type,
|
|
krb5_data *salt,
|
|
krb5_const_pointer keyseed,
|
|
krb5_keyblock **key)
|
|
{
|
|
return krb5_copy_keyblock (context, keyseed, key);
|
|
}
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
static krb5_error_code
|
|
init_as_req (krb5_context context,
|
|
KDCOptions opts,
|
|
const krb5_creds *creds,
|
|
const krb5_addresses *addrs,
|
|
const krb5_enctype *etypes,
|
|
AS_REQ *a)
|
|
{
|
|
krb5_error_code ret;
|
|
|
|
memset(a, 0, sizeof(*a));
|
|
|
|
a->pvno = 5;
|
|
a->msg_type = krb_as_req;
|
|
a->req_body.kdc_options = opts;
|
|
a->req_body.cname = calloc(1, sizeof(*a->req_body.cname));
|
|
if (a->req_body.cname == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto fail;
|
|
}
|
|
a->req_body.sname = calloc(1, sizeof(*a->req_body.sname));
|
|
if (a->req_body.sname == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto fail;
|
|
}
|
|
|
|
ret = _krb5_principal2principalname (a->req_body.cname, creds->client);
|
|
if (ret)
|
|
goto fail;
|
|
ret = copy_Realm(&creds->client->realm, &a->req_body.realm);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
ret = _krb5_principal2principalname (a->req_body.sname, creds->server);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
if(creds->times.starttime) {
|
|
a->req_body.from = malloc(sizeof(*a->req_body.from));
|
|
if (a->req_body.from == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto fail;
|
|
}
|
|
*a->req_body.from = creds->times.starttime;
|
|
}
|
|
if(creds->times.endtime){
|
|
if ((ALLOC(a->req_body.till, 1)) != NULL)
|
|
*a->req_body.till = creds->times.endtime;
|
|
else {
|
|
ret = krb5_enomem(context);
|
|
goto fail;
|
|
}
|
|
}
|
|
if(creds->times.renew_till){
|
|
a->req_body.rtime = malloc(sizeof(*a->req_body.rtime));
|
|
if (a->req_body.rtime == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto fail;
|
|
}
|
|
*a->req_body.rtime = creds->times.renew_till;
|
|
}
|
|
a->req_body.nonce = 0;
|
|
ret = _krb5_init_etype(context,
|
|
KRB5_PDU_AS_REQUEST,
|
|
&a->req_body.etype.len,
|
|
&a->req_body.etype.val,
|
|
etypes);
|
|
if (ret)
|
|
goto fail;
|
|
|
|
/*
|
|
* This means no addresses
|
|
*/
|
|
|
|
if (addrs && addrs->len == 0) {
|
|
a->req_body.addresses = NULL;
|
|
} else {
|
|
a->req_body.addresses = malloc(sizeof(*a->req_body.addresses));
|
|
if (a->req_body.addresses == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto fail;
|
|
}
|
|
|
|
if (addrs)
|
|
ret = krb5_copy_addresses(context, addrs, a->req_body.addresses);
|
|
else {
|
|
ret = krb5_get_all_client_addrs (context, a->req_body.addresses);
|
|
if(ret == 0 && a->req_body.addresses->len == 0) {
|
|
free(a->req_body.addresses);
|
|
a->req_body.addresses = NULL;
|
|
}
|
|
}
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
|
|
a->req_body.enc_authorization_data = NULL;
|
|
a->req_body.additional_tickets = NULL;
|
|
|
|
a->padata = NULL;
|
|
|
|
return 0;
|
|
fail:
|
|
free_AS_REQ(a);
|
|
memset_s(a, sizeof(*a), 0, sizeof(*a));
|
|
return ret;
|
|
}
|
|
|
|
|
|
static krb5_error_code
|
|
set_paid(struct pa_info_data *paid, krb5_context context,
|
|
krb5_enctype etype,
|
|
krb5_salttype salttype, void *salt_string, size_t salt_len,
|
|
krb5_data *s2kparams)
|
|
{
|
|
paid->etype = etype;
|
|
paid->salt.salttype = salttype;
|
|
paid->salt.saltvalue.data = malloc(salt_len + 1);
|
|
if (paid->salt.saltvalue.data == NULL) {
|
|
krb5_clear_error_message(context);
|
|
return krb5_enomem(context);
|
|
}
|
|
memcpy(paid->salt.saltvalue.data, salt_string, salt_len);
|
|
((char *)paid->salt.saltvalue.data)[salt_len] = '\0';
|
|
paid->salt.saltvalue.length = salt_len;
|
|
if (s2kparams) {
|
|
krb5_error_code ret;
|
|
|
|
ret = krb5_copy_data(context, s2kparams, &paid->s2kparams);
|
|
if (ret) {
|
|
krb5_clear_error_message(context);
|
|
krb5_free_salt(context, paid->salt);
|
|
return ret;
|
|
}
|
|
} else
|
|
paid->s2kparams = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct pa_info_data *
|
|
pa_etype_info2(krb5_context context,
|
|
const krb5_principal client,
|
|
const AS_REQ *asreq,
|
|
struct pa_info_data *paid,
|
|
heim_octet_string *data)
|
|
{
|
|
krb5_error_code ret;
|
|
ETYPE_INFO2 e;
|
|
size_t sz;
|
|
size_t i, j;
|
|
|
|
memset(&e, 0, sizeof(e));
|
|
ret = decode_ETYPE_INFO2(data->data, data->length, &e, &sz);
|
|
if (ret)
|
|
goto out;
|
|
if (e.len == 0)
|
|
goto out;
|
|
for (j = 0; j < asreq->req_body.etype.len; j++) {
|
|
for (i = 0; i < e.len; i++) {
|
|
|
|
if (krb5_enctype_valid(context, e.val[i].etype) != 0)
|
|
continue;
|
|
|
|
if (asreq->req_body.etype.val[j] == e.val[i].etype) {
|
|
krb5_salt salt;
|
|
if (e.val[i].salt == NULL)
|
|
ret = krb5_get_pw_salt(context, client, &salt);
|
|
else {
|
|
salt.saltvalue.data = *e.val[i].salt;
|
|
salt.saltvalue.length = strlen(*e.val[i].salt);
|
|
ret = 0;
|
|
}
|
|
if (ret == 0)
|
|
ret = set_paid(paid, context, e.val[i].etype,
|
|
KRB5_PW_SALT,
|
|
salt.saltvalue.data,
|
|
salt.saltvalue.length,
|
|
e.val[i].s2kparams);
|
|
if (e.val[i].salt == NULL)
|
|
krb5_free_salt(context, salt);
|
|
if (ret == 0) {
|
|
free_ETYPE_INFO2(&e);
|
|
return paid;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
out:
|
|
free_ETYPE_INFO2(&e);
|
|
return NULL;
|
|
}
|
|
|
|
static struct pa_info_data *
|
|
pa_etype_info(krb5_context context,
|
|
const krb5_principal client,
|
|
const AS_REQ *asreq,
|
|
struct pa_info_data *paid,
|
|
heim_octet_string *data)
|
|
{
|
|
krb5_error_code ret;
|
|
ETYPE_INFO e;
|
|
size_t sz;
|
|
size_t i, j;
|
|
|
|
memset(&e, 0, sizeof(e));
|
|
ret = decode_ETYPE_INFO(data->data, data->length, &e, &sz);
|
|
if (ret)
|
|
goto out;
|
|
if (e.len == 0)
|
|
goto out;
|
|
for (j = 0; j < asreq->req_body.etype.len; j++) {
|
|
for (i = 0; i < e.len; i++) {
|
|
|
|
if (krb5_enctype_valid(context, e.val[i].etype) != 0)
|
|
continue;
|
|
|
|
if (asreq->req_body.etype.val[j] == e.val[i].etype) {
|
|
krb5_salt salt;
|
|
salt.salttype = KRB5_PW_SALT;
|
|
if (e.val[i].salt == NULL)
|
|
ret = krb5_get_pw_salt(context, client, &salt);
|
|
else {
|
|
salt.saltvalue = *e.val[i].salt;
|
|
ret = 0;
|
|
}
|
|
if (e.val[i].salttype)
|
|
salt.salttype = *e.val[i].salttype;
|
|
if (ret == 0) {
|
|
ret = set_paid(paid, context, e.val[i].etype,
|
|
salt.salttype,
|
|
salt.saltvalue.data,
|
|
salt.saltvalue.length,
|
|
NULL);
|
|
if (e.val[i].salt == NULL)
|
|
krb5_free_salt(context, salt);
|
|
}
|
|
if (ret == 0) {
|
|
free_ETYPE_INFO(&e);
|
|
return paid;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
out:
|
|
free_ETYPE_INFO(&e);
|
|
return NULL;
|
|
}
|
|
|
|
static struct pa_info_data *
|
|
pa_pw_or_afs3_salt(krb5_context context,
|
|
const krb5_principal client,
|
|
const AS_REQ *asreq,
|
|
struct pa_info_data *paid,
|
|
heim_octet_string *data)
|
|
{
|
|
krb5_error_code ret;
|
|
if (paid->etype == KRB5_ENCTYPE_NULL)
|
|
return NULL;
|
|
if (krb5_enctype_valid(context, paid->etype) != 0)
|
|
return NULL;
|
|
|
|
ret = set_paid(paid, context,
|
|
paid->etype,
|
|
paid->salt.salttype,
|
|
data->data,
|
|
data->length,
|
|
NULL);
|
|
if (ret)
|
|
return NULL;
|
|
return paid;
|
|
}
|
|
|
|
|
|
static krb5_error_code
|
|
make_pa_enc_timestamp(krb5_context context, METHOD_DATA *md,
|
|
krb5_enctype etype, krb5_keyblock *key)
|
|
{
|
|
PA_ENC_TS_ENC p;
|
|
unsigned char *buf;
|
|
size_t buf_size;
|
|
size_t len = 0;
|
|
EncryptedData encdata;
|
|
krb5_error_code ret;
|
|
int32_t usec;
|
|
int usec2;
|
|
krb5_crypto crypto;
|
|
|
|
krb5_us_timeofday (context, &p.patimestamp, &usec);
|
|
usec2 = usec;
|
|
p.pausec = &usec2;
|
|
|
|
ASN1_MALLOC_ENCODE(PA_ENC_TS_ENC, buf, buf_size, &p, &len, ret);
|
|
if (ret)
|
|
return ret;
|
|
if(buf_size != len)
|
|
krb5_abortx(context, "internal error in ASN.1 encoder");
|
|
|
|
ret = krb5_crypto_init(context, key, 0, &crypto);
|
|
if (ret) {
|
|
free(buf);
|
|
return ret;
|
|
}
|
|
ret = krb5_encrypt_EncryptedData(context,
|
|
crypto,
|
|
KRB5_KU_PA_ENC_TIMESTAMP,
|
|
buf,
|
|
len,
|
|
0,
|
|
&encdata);
|
|
free(buf);
|
|
krb5_crypto_destroy(context, crypto);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ASN1_MALLOC_ENCODE(EncryptedData, buf, buf_size, &encdata, &len, ret);
|
|
free_EncryptedData(&encdata);
|
|
if (ret)
|
|
return ret;
|
|
if(buf_size != len)
|
|
krb5_abortx(context, "internal error in ASN.1 encoder");
|
|
|
|
ret = krb5_padata_add(context, md, KRB5_PADATA_ENC_TIMESTAMP, buf, len);
|
|
if (ret)
|
|
free(buf);
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code
|
|
add_enc_ts_padata(krb5_context context,
|
|
METHOD_DATA *md,
|
|
krb5_principal client,
|
|
krb5_s2k_proc keyproc,
|
|
krb5_const_pointer keyseed,
|
|
krb5_enctype *enctypes,
|
|
unsigned netypes,
|
|
krb5_salt *salt,
|
|
krb5_data *s2kparams)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_salt salt2;
|
|
krb5_enctype *ep;
|
|
size_t i;
|
|
|
|
memset(&salt2, 0, sizeof(salt2));
|
|
|
|
if(salt == NULL) {
|
|
/* default to standard salt */
|
|
ret = krb5_get_pw_salt (context, client, &salt2);
|
|
if (ret)
|
|
return ret;
|
|
salt = &salt2;
|
|
}
|
|
if (!enctypes) {
|
|
enctypes = context->etypes;
|
|
netypes = 0;
|
|
for (ep = enctypes; *ep != ETYPE_NULL; ep++)
|
|
netypes++;
|
|
}
|
|
|
|
for (i = 0; i < netypes; ++i) {
|
|
krb5_keyblock *key;
|
|
|
|
_krb5_debug(context, 5, "krb5_get_init_creds: using ENC-TS with enctype %d", enctypes[i]);
|
|
|
|
ret = (*keyproc)(context, enctypes[i], keyseed,
|
|
*salt, s2kparams, &key);
|
|
if (ret)
|
|
continue;
|
|
ret = make_pa_enc_timestamp (context, md, enctypes[i], key);
|
|
krb5_free_keyblock (context, key);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
if(salt == &salt2)
|
|
krb5_free_salt(context, salt2);
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
pa_data_to_md_ts_enc(krb5_context context,
|
|
const AS_REQ *a,
|
|
const krb5_principal client,
|
|
krb5_init_creds_context ctx,
|
|
struct pa_info_data *ppaid,
|
|
METHOD_DATA *md)
|
|
{
|
|
if (ctx->keyproc == NULL || ctx->keyseed == NULL)
|
|
return 0;
|
|
|
|
if (ppaid) {
|
|
add_enc_ts_padata(context, md, client,
|
|
ctx->keyproc, ctx->keyseed,
|
|
&ppaid->etype, 1,
|
|
&ppaid->salt, ppaid->s2kparams);
|
|
} else {
|
|
krb5_salt salt;
|
|
|
|
_krb5_debug(context, 5, "krb5_get_init_creds: pa-info not found, guessing salt");
|
|
|
|
/* make a v5 salted pa-data */
|
|
add_enc_ts_padata(context, md, client,
|
|
ctx->keyproc, ctx->keyseed,
|
|
a->req_body.etype.val, a->req_body.etype.len,
|
|
NULL, NULL);
|
|
|
|
/* make a v4 salted pa-data */
|
|
salt.salttype = KRB5_PW_SALT;
|
|
krb5_data_zero(&salt.saltvalue);
|
|
add_enc_ts_padata(context, md, client,
|
|
ctx->keyproc, ctx->keyseed,
|
|
a->req_body.etype.val, a->req_body.etype.len,
|
|
&salt, NULL);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
pa_data_to_key_plain(krb5_context context,
|
|
const krb5_principal client,
|
|
krb5_init_creds_context ctx,
|
|
krb5_salt salt,
|
|
krb5_data *s2kparams,
|
|
krb5_enctype etype,
|
|
krb5_keyblock **key)
|
|
{
|
|
krb5_error_code ret;
|
|
|
|
ret = (*ctx->keyproc)(context, etype, ctx->keyseed,
|
|
salt, s2kparams, key);
|
|
return ret;
|
|
}
|
|
|
|
struct pkinit_context {
|
|
unsigned int win2k : 1;
|
|
unsigned int used_pkinit : 1;
|
|
};
|
|
|
|
|
|
static krb5_error_code
|
|
pa_data_to_md_pkinit(krb5_context context,
|
|
const AS_REQ *a,
|
|
const krb5_principal client,
|
|
int win2k,
|
|
krb5_init_creds_context ctx,
|
|
METHOD_DATA *md)
|
|
{
|
|
if (ctx->pk_init_ctx == NULL)
|
|
return 0;
|
|
#ifdef PKINIT
|
|
return _krb5_pk_mk_padata(context,
|
|
ctx->pk_init_ctx,
|
|
ctx->ic_flags,
|
|
win2k,
|
|
&a->req_body,
|
|
ctx->pk_nonce,
|
|
md);
|
|
#else
|
|
krb5_set_error_message(context, EINVAL,
|
|
N_("no support for PKINIT compiled in", ""));
|
|
return EINVAL;
|
|
#endif
|
|
}
|
|
|
|
static krb5_error_code
|
|
pkinit_configure_ietf(krb5_context context, krb5_init_creds_context ctx, void *pa_ctx)
|
|
{
|
|
struct pkinit_context *pkinit_ctx = pa_ctx;
|
|
|
|
pkinit_ctx->win2k = 0;
|
|
|
|
if (ctx->pk_init_ctx == NULL)
|
|
return HEIM_ERR_PA_CANT_CONTINUE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
pkinit_configure_win(krb5_context context, krb5_init_creds_context ctx, void *pa_ctx)
|
|
{
|
|
struct pkinit_context *pkinit_ctx = pa_ctx;
|
|
|
|
pkinit_ctx->win2k = 1;
|
|
pkinit_ctx->used_pkinit = 0;
|
|
|
|
if (ctx->pk_init_ctx == NULL)
|
|
return HEIM_ERR_PA_CANT_CONTINUE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
pkinit_step(krb5_context context, krb5_init_creds_context ctx, void *pa_ctx, PA_DATA *pa, const AS_REQ *a,
|
|
const AS_REP *rep, METHOD_DATA *in_md, METHOD_DATA *out_md)
|
|
{
|
|
krb5_error_code ret = HEIM_ERR_PA_CANT_CONTINUE;
|
|
struct pkinit_context *pkinit_ctx = pa_ctx;
|
|
|
|
if (rep == NULL) {
|
|
if (pkinit_ctx->used_pkinit) {
|
|
krb5_set_error_message(context, KRB5_GET_IN_TKT_LOOP,
|
|
"Already tried PKINIT(%s), looping",
|
|
pkinit_ctx->win2k ? "win2k" : "ietf");
|
|
} else {
|
|
ret = pa_data_to_md_pkinit(context, a, ctx->cred.client,
|
|
(pkinit_ctx->win2k != 0),
|
|
ctx, out_md);
|
|
if (ret == 0)
|
|
ret = HEIM_ERR_PA_CONTINUE_NEEDED;
|
|
|
|
pkinit_ctx->used_pkinit = 1;
|
|
}
|
|
} else if (pa) {
|
|
ret = _krb5_pk_rd_pa_reply(context,
|
|
a->req_body.realm,
|
|
ctx->pk_init_ctx,
|
|
rep->enc_part.etype,
|
|
ctx->pk_nonce,
|
|
&ctx->req_buffer,
|
|
pa,
|
|
&ctx->fast_state.reply_key);
|
|
if (ret == 0)
|
|
ctx->runflags.allow_save_as_reply_key = 1;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
pkinit_release(void *pa_ctx)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* GSS-API pre-authentication support
|
|
*/
|
|
|
|
struct pa_gss_context {
|
|
struct gss_ctx_id_t_desc_struct *context_handle;
|
|
int open;
|
|
};
|
|
|
|
static krb5_error_code
|
|
pa_gss_configure(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
void *pa_ctx)
|
|
{
|
|
krb5_gss_init_ctx gssic = ctx->gss_init_ctx;
|
|
struct pa_gss_context *pa_gss_ctx = pa_ctx;
|
|
|
|
if (gssic == NULL)
|
|
return HEIM_ERR_PA_CANT_CONTINUE;
|
|
|
|
pa_gss_ctx->context_handle = NULL;
|
|
pa_gss_ctx->open = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
pa_data_to_md_gss(krb5_context context,
|
|
const AS_REQ *a,
|
|
const krb5_creds *creds,
|
|
krb5_init_creds_context ctx,
|
|
struct pa_gss_context *pa_gss_ctx,
|
|
PA_DATA *pa,
|
|
METHOD_DATA *out_md)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_gss_init_ctx gssic = ctx->gss_init_ctx;
|
|
krb5_data req_body;
|
|
krb5_data *input_token, output_token;
|
|
size_t len = 0;
|
|
|
|
krb5_data_zero(&req_body);
|
|
krb5_data_zero(&output_token);
|
|
|
|
input_token = pa ? &pa->padata_value : NULL;
|
|
|
|
if ((input_token == NULL || input_token->length == 0) &&
|
|
pa_gss_ctx->context_handle) {
|
|
krb5_set_error_message(context, HEIM_ERR_PA_CANT_CONTINUE,
|
|
"Missing GSS preauthentication data from KDC");
|
|
return HEIM_ERR_PA_CANT_CONTINUE;
|
|
}
|
|
|
|
ASN1_MALLOC_ENCODE(KDC_REQ_BODY, req_body.data, req_body.length,
|
|
&ctx->as_req.req_body, &len, ret);
|
|
if (ret)
|
|
goto out;
|
|
heim_assert(req_body.length == len, "ASN.1 internal error");
|
|
|
|
ret = gssic->step(context, gssic, creds, &pa_gss_ctx->context_handle,
|
|
ctx->flags, &req_body,
|
|
input_token, &output_token);
|
|
|
|
/*
|
|
* If FAST authenticated the KDC (which will be the case unless anonymous
|
|
* PKINIT was used without KDC certificate validation) then we can relax
|
|
* the mutual authentication requirement.
|
|
*/
|
|
if (ret == KRB5_MUTUAL_FAILED &&
|
|
(ctx->fast_state.flags & KRB5_FAST_EXPECTED) &&
|
|
(ctx->fast_state.flags & KRB5_FAST_KDC_VERIFIED))
|
|
ret = 0;
|
|
if (ret == 0) {
|
|
/*
|
|
* Always require a strengthen key if FAST was used, to avoid a MITM
|
|
* attack that could result in unintended privilege escalation should
|
|
* the KDC add positive authorization data from the armor ticket.
|
|
*/
|
|
if ((ctx->fast_state.flags & KRB5_FAST_EXPECTED) &&
|
|
ctx->fast_state.strengthen_key == NULL) {
|
|
krb5_set_error_message(context, HEIM_ERR_PA_CANT_CONTINUE,
|
|
"FAST GSS pre-authentication without strengthen key");
|
|
ret = KRB5_KDCREP_MODIFIED;
|
|
goto out;
|
|
}
|
|
|
|
pa_gss_ctx->open = 1;
|
|
}
|
|
|
|
if (output_token.length) {
|
|
ret = krb5_padata_add(context, out_md, KRB5_PADATA_GSS,
|
|
output_token.data, output_token.length);
|
|
if (ret)
|
|
goto out;
|
|
|
|
krb5_data_zero(&output_token);
|
|
}
|
|
|
|
out:
|
|
krb5_data_free(&output_token);
|
|
krb5_data_free(&req_body);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code
|
|
pa_gss_step(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
void *pa_ctx,
|
|
PA_DATA *pa,
|
|
const AS_REQ *a,
|
|
const AS_REP *rep,
|
|
METHOD_DATA *in_md,
|
|
METHOD_DATA *out_md)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_principal cname;
|
|
krb5_gss_init_ctx gssic = ctx->gss_init_ctx;
|
|
struct pa_gss_context *pa_gss_ctx = pa_ctx;
|
|
|
|
heim_assert(gssic != NULL, "invalid context passed to pa_gss_step");
|
|
|
|
if (!pa_gss_ctx->open) {
|
|
ret = pa_data_to_md_gss(context, a, &ctx->cred, ctx,
|
|
pa_gss_ctx, pa, out_md);
|
|
if (ret == HEIM_ERR_PA_CONTINUE_NEEDED && rep) {
|
|
krb5_set_error_message(context, KRB5_PREAUTH_FAILED,
|
|
"KDC sent AS-REP before GSS "
|
|
"pre-authentication completed");
|
|
ret = KRB5_KDCREP_MODIFIED;
|
|
} else if (ret == 0 && rep == NULL) {
|
|
ret = HEIM_ERR_PA_CONTINUE_NEEDED; /* odd number of legs */
|
|
}
|
|
if (ret)
|
|
return ret;
|
|
} else if (pa && pa->padata_value.length) {
|
|
krb5_set_error_message(context, KRB5_GET_IN_TKT_LOOP,
|
|
"Already completed GSS pre-authentication");
|
|
return KRB5_GET_IN_TKT_LOOP;
|
|
} else if (rep == NULL) {
|
|
krb5_set_error_message(context, KRB5_PREAUTH_FAILED,
|
|
"Completed GSS pre-authentication before KDC");
|
|
return KRB5_PREAUTH_FAILED;
|
|
}
|
|
|
|
heim_assert(pa_gss_ctx->open,
|
|
"GSS pre-authentication incomplete");
|
|
|
|
ret = gssic->finish(context, gssic, &ctx->cred,
|
|
pa_gss_ctx->context_handle, ctx->nonce,
|
|
rep->enc_part.etype, &cname,
|
|
&ctx->fast_state.reply_key);
|
|
if (ret)
|
|
return ret;
|
|
|
|
{
|
|
char *from = NULL;
|
|
char *to = NULL;
|
|
|
|
if (krb5_unparse_name(context, ctx->cred.client, &from) == 0) {
|
|
if (krb5_unparse_name(context, cname, &to) == 0) {
|
|
_krb5_debug(context, 1, "pa_gss_step: %s as %s",
|
|
from, to);
|
|
krb5_xfree(to);
|
|
}
|
|
krb5_xfree(from);
|
|
}
|
|
}
|
|
|
|
if (krb5_principal_is_federated(context, ctx->cred.client)) {
|
|
/*
|
|
* The well-known federated name will be replaced with the cname
|
|
* in the AS-REP, but save the locally mapped initiator name in the
|
|
* cred for logging.
|
|
*/
|
|
krb5_free_principal(context, ctx->cred.client);
|
|
ctx->cred.client = cname;
|
|
|
|
ctx->ic_flags |= KRB5_INIT_CREDS_NO_C_CANON_CHECK;
|
|
} else {
|
|
krb5_free_principal(context, cname);
|
|
}
|
|
|
|
ctx->runflags.allow_save_as_reply_key = 1;
|
|
|
|
gssic->delete_sec_context(context, gssic, pa_gss_ctx->context_handle);
|
|
pa_gss_ctx->context_handle = NULL;
|
|
pa_gss_ctx->open = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
pa_gss_restart(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
void *pa_ctx)
|
|
{
|
|
krb5_gss_init_ctx gssic = ctx->gss_init_ctx;
|
|
struct pa_gss_context *pa_gss_ctx = pa_ctx;
|
|
|
|
if (gssic == NULL)
|
|
return HEIM_ERR_PA_CANT_CONTINUE;
|
|
|
|
gssic->delete_sec_context(context, gssic, pa_gss_ctx->context_handle);
|
|
pa_gss_ctx->context_handle = NULL;
|
|
pa_gss_ctx->open = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
pa_gss_release(void *pa_ctx)
|
|
{
|
|
}
|
|
|
|
krb5_error_code
|
|
_krb5_make_pa_enc_challenge(krb5_context context,
|
|
krb5_crypto crypto,
|
|
krb5_key_usage usage,
|
|
METHOD_DATA *md)
|
|
{
|
|
PA_ENC_TS_ENC p;
|
|
unsigned char *buf;
|
|
size_t buf_size;
|
|
size_t len = 0;
|
|
EncryptedData encdata;
|
|
krb5_error_code ret;
|
|
int32_t usec;
|
|
int usec2;
|
|
|
|
krb5_us_timeofday (context, &p.patimestamp, &usec);
|
|
usec2 = usec;
|
|
p.pausec = &usec2;
|
|
|
|
ASN1_MALLOC_ENCODE(PA_ENC_TS_ENC, buf, buf_size, &p, &len, ret);
|
|
if (ret)
|
|
return ret;
|
|
if(buf_size != len)
|
|
krb5_abortx(context, "internal error in ASN.1 encoder");
|
|
|
|
ret = krb5_encrypt_EncryptedData(context,
|
|
crypto,
|
|
usage,
|
|
buf,
|
|
len,
|
|
0,
|
|
&encdata);
|
|
free(buf);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ASN1_MALLOC_ENCODE(EncryptedData, buf, buf_size, &encdata, &len, ret);
|
|
free_EncryptedData(&encdata);
|
|
if (ret)
|
|
return ret;
|
|
if(buf_size != len)
|
|
krb5_abortx(context, "internal error in ASN.1 encoder");
|
|
|
|
ret = krb5_padata_add(context, md, KRB5_PADATA_ENCRYPTED_CHALLENGE, buf, len);
|
|
if (ret)
|
|
free(buf);
|
|
return ret;
|
|
}
|
|
|
|
krb5_error_code
|
|
_krb5_validate_pa_enc_challenge(krb5_context context,
|
|
krb5_crypto crypto,
|
|
krb5_key_usage usage,
|
|
EncryptedData *enc_data,
|
|
const char *peer_name)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_data ts_data;
|
|
PA_ENC_TS_ENC p;
|
|
time_t timestamp;
|
|
int32_t usec;
|
|
size_t size;
|
|
|
|
ret = krb5_decrypt_EncryptedData(context, crypto, usage, enc_data, &ts_data);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = decode_PA_ENC_TS_ENC(ts_data.data,
|
|
ts_data.length,
|
|
&p,
|
|
&size);
|
|
krb5_data_free(&ts_data);
|
|
if(ret){
|
|
ret = KRB5KDC_ERR_PREAUTH_FAILED;
|
|
_krb5_debug(context, 5, "Failed to decode PA-ENC-TS_ENC -- %s", peer_name);
|
|
goto out;
|
|
}
|
|
|
|
krb5_us_timeofday(context, ×tamp, &usec);
|
|
|
|
if (krb5_time_abs(timestamp, p.patimestamp) > context->max_skew) {
|
|
char client_time[100];
|
|
|
|
krb5_format_time(context, p.patimestamp,
|
|
client_time, sizeof(client_time), TRUE);
|
|
|
|
ret = KRB5KRB_AP_ERR_SKEW;
|
|
_krb5_debug(context, 0, "Too large time skew, "
|
|
"client time %s is out by %u > %d seconds -- %s",
|
|
client_time,
|
|
(unsigned)krb5_time_abs(timestamp, p.patimestamp),
|
|
(int)context->max_skew,
|
|
peer_name);
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
|
|
out:
|
|
free_PA_ENC_TS_ENC(&p);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static struct pa_info_data *
|
|
process_pa_info(krb5_context, const krb5_principal, const AS_REQ *, struct pa_info_data *, METHOD_DATA *);
|
|
|
|
|
|
static krb5_error_code
|
|
enc_chal_step(krb5_context context, krb5_init_creds_context ctx, void *pa_ctx, PA_DATA *pa, const AS_REQ *a,
|
|
const AS_REP *rep, METHOD_DATA *in_md, METHOD_DATA *out_md)
|
|
{
|
|
struct pa_info_data paid, *ppaid;
|
|
krb5_keyblock challengekey;
|
|
krb5_data pepper1, pepper2;
|
|
krb5_crypto crypto = NULL;
|
|
krb5_enctype aenctype;
|
|
krb5_error_code ret;
|
|
|
|
memset(&paid, 0, sizeof(paid));
|
|
|
|
if (rep == NULL)
|
|
paid.etype = KRB5_ENCTYPE_NULL;
|
|
else
|
|
paid.etype = rep->enc_part.etype;
|
|
ppaid = process_pa_info(context, ctx->cred.client, a, &paid, in_md);
|
|
|
|
/*
|
|
* If we don't have ppaid, it's because the KDC has not sent any
|
|
* salt info. Let's do the first roundtrip so the KDC has a chance
|
|
* to send some.
|
|
*/
|
|
if (ppaid == NULL) {
|
|
_krb5_debug(context, 5, "no ppaid found");
|
|
return HEIM_ERR_PA_CONTINUE_NEEDED;
|
|
}
|
|
if (ppaid->etype == KRB5_ENCTYPE_NULL) {
|
|
return HEIM_ERR_PA_CANT_CONTINUE;
|
|
}
|
|
|
|
if (ctx->fast_state.reply_key)
|
|
krb5_free_keyblock(context, ctx->fast_state.reply_key);
|
|
|
|
ret = pa_data_to_key_plain(context, ctx->cred.client, ctx,
|
|
ppaid->salt, ppaid->s2kparams, ppaid->etype,
|
|
&ctx->fast_state.reply_key);
|
|
free_paid(context, &paid);
|
|
if (ret) {
|
|
_krb5_debug(context, 5, "enc-chal: failed to build key");
|
|
return ret;
|
|
}
|
|
|
|
ret = krb5_crypto_init(context, ctx->fast_state.reply_key, 0, &crypto);
|
|
if (ret)
|
|
return ret;
|
|
|
|
krb5_crypto_getenctype(context, ctx->fast_state.armor_crypto, &aenctype);
|
|
|
|
pepper1.data = rep ? "kdcchallengearmor" : "clientchallengearmor";
|
|
pepper1.length = strlen(pepper1.data);
|
|
pepper2.data = "challengelongterm";
|
|
pepper2.length = strlen(pepper2.data);
|
|
|
|
ret = krb5_crypto_fx_cf2(context, ctx->fast_state.armor_crypto, crypto,
|
|
&pepper1, &pepper2, aenctype,
|
|
&challengekey);
|
|
krb5_crypto_destroy(context, crypto);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = krb5_crypto_init(context, &challengekey, 0, &crypto);
|
|
krb5_free_keyblock_contents(context, &challengekey);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (rep) {
|
|
EncryptedData enc_data;
|
|
size_t size;
|
|
|
|
_krb5_debug(context, 5, "ENC_CHAL rep key");
|
|
|
|
if (ctx->fast_state.strengthen_key == NULL) {
|
|
krb5_crypto_destroy(context, crypto);
|
|
_krb5_debug(context, 5, "ENC_CHAL w/o strengthen_key");
|
|
return KRB5_KDCREP_MODIFIED;
|
|
}
|
|
|
|
if (pa == NULL) {
|
|
krb5_crypto_destroy(context, crypto);
|
|
_krb5_debug(context, 0, "KDC response missing");
|
|
return HEIM_ERR_PA_CANT_CONTINUE;
|
|
}
|
|
|
|
ret = decode_EncryptedData(pa->padata_value.data,
|
|
pa->padata_value.length,
|
|
&enc_data,
|
|
&size);
|
|
if (ret) {
|
|
ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
|
|
_krb5_debug(context, 5, "Failed to decode ENC_CHAL KDC reply");
|
|
return ret;
|
|
}
|
|
|
|
ret = _krb5_validate_pa_enc_challenge(context, crypto,
|
|
KRB5_KU_ENC_CHALLENGE_KDC,
|
|
&enc_data,
|
|
"KDC");
|
|
free_EncryptedData(&enc_data);
|
|
krb5_crypto_destroy(context, crypto);
|
|
|
|
return ret;
|
|
|
|
} else {
|
|
|
|
ret = _krb5_make_pa_enc_challenge(context, crypto,
|
|
KRB5_KU_ENC_CHALLENGE_CLIENT,
|
|
out_md);
|
|
krb5_crypto_destroy(context, crypto);
|
|
if (ret) {
|
|
_krb5_debug(context, 5, "enc-chal: failed build enc challenge");
|
|
return ret;
|
|
}
|
|
|
|
return HEIM_ERR_PA_CONTINUE_NEEDED;
|
|
}
|
|
}
|
|
|
|
struct enc_ts_context {
|
|
int used_pa_types;
|
|
#define USED_ENC_TS_GUESS 4
|
|
#define USED_ENC_TS_INFO 8
|
|
#define USED_ENC_TS_RENEG 16
|
|
krb5_principal user;
|
|
};
|
|
|
|
static krb5_error_code
|
|
enc_ts_restart(krb5_context context, krb5_init_creds_context ctx, void *pa_ctx)
|
|
{
|
|
struct enc_ts_context *pactx = (struct enc_ts_context *)pa_ctx;
|
|
pactx->used_pa_types = 0;
|
|
krb5_free_principal(context, pactx->user);
|
|
pactx->user = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
enc_ts_step(krb5_context context, krb5_init_creds_context ctx, void *pa_ctx, PA_DATA *pa,
|
|
const AS_REQ *a,
|
|
const AS_REP *rep,
|
|
METHOD_DATA *in_md, METHOD_DATA *out_md)
|
|
{
|
|
struct enc_ts_context *pactx = (struct enc_ts_context *)pa_ctx;
|
|
struct pa_info_data paid, *ppaid;
|
|
krb5_error_code ret;
|
|
const char *state;
|
|
unsigned flag;
|
|
|
|
/*
|
|
* Keep track of the user we used so that we can restart
|
|
* authentication when we get referrals.
|
|
*/
|
|
|
|
if (pactx->user && !krb5_principal_compare(context, pactx->user, ctx->cred.client)) {
|
|
pactx->used_pa_types = 0;
|
|
krb5_free_principal(context, pactx->user);
|
|
pactx->user = NULL;
|
|
}
|
|
|
|
if (pactx->user == NULL) {
|
|
ret = krb5_copy_principal(context, ctx->cred.client, &pactx->user);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
memset(&paid, 0, sizeof(paid));
|
|
|
|
if (rep == NULL)
|
|
paid.etype = KRB5_ENCTYPE_NULL;
|
|
else
|
|
paid.etype = rep->enc_part.etype;
|
|
|
|
ppaid = process_pa_info(context, ctx->cred.client, a, &paid, in_md);
|
|
|
|
if (rep) {
|
|
/*
|
|
* Some KDC's don't send salt info in the reply when there is
|
|
* success pre-auth happened before, so use cached copy (or
|
|
* even better, if there is just one pre-auth, save reply-key).
|
|
*/
|
|
if (ppaid == NULL && ctx->paid.etype != KRB5_ENCTYPE_NULL) {
|
|
ppaid = &ctx->paid;
|
|
|
|
} else if (ppaid == NULL) {
|
|
_krb5_debug(context, 0, "no paid when building key, build a default salt structure ?");
|
|
return HEIM_ERR_PA_CANT_CONTINUE;
|
|
}
|
|
|
|
ret = pa_data_to_key_plain(context, ctx->cred.client, ctx,
|
|
ppaid->salt, ppaid->s2kparams, rep->enc_part.etype,
|
|
&ctx->fast_state.reply_key);
|
|
free_paid(context, &paid);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* If we don't have ppaid, it's because the KDC has not sent any
|
|
* salt info. Let's do the first roundtrip so the KDC has a chance
|
|
* to send some.
|
|
*
|
|
* Don't bother guessing, it sounds like a good idea until you run
|
|
* into KDCs that are doing failed auth counting based on the
|
|
* ENC_TS tries.
|
|
*
|
|
* Stashing the salt for the next run is a different issue and
|
|
* could be considered in the future.
|
|
*/
|
|
|
|
if (ppaid == NULL) {
|
|
_krb5_debug(context, 5,
|
|
"TS-ENC: waiting for KDC to set pw-salt/etype_info{,2}");
|
|
return HEIM_ERR_PA_CONTINUE_NEEDED;
|
|
}
|
|
if (ppaid->etype == KRB5_ENCTYPE_NULL) {
|
|
free_paid(context, &paid);
|
|
_krb5_debug(context, 5,
|
|
"TS-ENC: kdc proposes enctype NULL ?");
|
|
return HEIM_ERR_PA_CANT_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* We have to allow the KDC to re-negotiate the PA-TS data
|
|
* once, this is since a windows read only
|
|
* KDC that doesn't have the keys simply guesses what the
|
|
* master is supposed to support. The case where this
|
|
* breaks is when the RO-KDC is a newer version than the RW-KDC
|
|
* and the RO-KDC announced a enctype that the older doesn't
|
|
* support.
|
|
*/
|
|
if (pactx->used_pa_types & USED_ENC_TS_INFO) {
|
|
flag = USED_ENC_TS_RENEG;
|
|
state = "reneg";
|
|
} else {
|
|
flag = USED_ENC_TS_INFO;
|
|
state = "info";
|
|
}
|
|
|
|
if (pactx->used_pa_types & flag) {
|
|
free_paid(context, &paid);
|
|
krb5_set_error_message(context, KRB5_GET_IN_TKT_LOOP,
|
|
"Already tried ENC-TS-%s, looping", state);
|
|
return KRB5_GET_IN_TKT_LOOP;
|
|
}
|
|
|
|
pactx->used_pa_types |= flag;
|
|
|
|
free_paid(context, &ctx->paid);
|
|
ctx->paid = *ppaid;
|
|
|
|
ret = pa_data_to_md_ts_enc(context, a, ctx->cred.client, ctx, ppaid, out_md);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return HEIM_ERR_PA_CONTINUE_NEEDED;
|
|
}
|
|
|
|
static void
|
|
enc_ts_release(void *pa_ctx)
|
|
{
|
|
struct enc_ts_context *pactx = (struct enc_ts_context *)pa_ctx;
|
|
|
|
if (pactx->user)
|
|
krb5_free_principal(NULL, pactx->user);
|
|
}
|
|
|
|
static krb5_error_code
|
|
pa_pac_step(krb5_context context, krb5_init_creds_context ctx, void *pa_ctx, PA_DATA *pa, const AS_REQ *a,
|
|
const AS_REP *rep, METHOD_DATA *in_md, METHOD_DATA *out_md)
|
|
{
|
|
size_t len = 0, length;
|
|
krb5_error_code ret;
|
|
PA_PAC_REQUEST req;
|
|
void *buf;
|
|
|
|
switch (ctx->req_pac) {
|
|
case KRB5_INIT_CREDS_TRISTATE_UNSET:
|
|
return 0; /* don't bother */
|
|
case KRB5_INIT_CREDS_TRISTATE_TRUE:
|
|
req.include_pac = 1;
|
|
break;
|
|
case KRB5_INIT_CREDS_TRISTATE_FALSE:
|
|
req.include_pac = 0;
|
|
}
|
|
|
|
ASN1_MALLOC_ENCODE(PA_PAC_REQUEST, buf, length,
|
|
&req, &len, ret);
|
|
if (ret)
|
|
return ret;
|
|
heim_assert(len == length, "internal error in ASN.1 encoder");
|
|
|
|
ret = krb5_padata_add(context, out_md, KRB5_PADATA_PA_PAC_REQUEST, buf, len);
|
|
if (ret)
|
|
free(buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
pa_enc_pa_rep_step(krb5_context context, krb5_init_creds_context ctx, void *pa_ctx, PA_DATA *pa, const AS_REQ *a,
|
|
const AS_REP *rep, METHOD_DATA *in_md, METHOD_DATA *out_md)
|
|
{
|
|
if (ctx->runflags.allow_enc_pa_rep)
|
|
return krb5_padata_add(context, out_md, KRB5_PADATA_REQ_ENC_PA_REP, NULL, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
pa_fx_cookie_step(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
void *pa_ctx,
|
|
PA_DATA *pa,
|
|
const AS_REQ *a,
|
|
const AS_REP *rep,
|
|
METHOD_DATA *in_md,
|
|
METHOD_DATA *out_md)
|
|
{
|
|
krb5_error_code ret;
|
|
void *cookie;
|
|
PA_DATA *pad;
|
|
int idx = 0;
|
|
|
|
pad = krb5_find_padata(in_md->val, in_md->len, KRB5_PADATA_FX_COOKIE, &idx);
|
|
if (pad == NULL) {
|
|
/*
|
|
* RFC 6113 5.4.3: PA-FX-COOKIE MUST be included if the KDC
|
|
* expects at least one more message from the client.
|
|
*/
|
|
if (ctx->error.error_code == KRB5_KDC_ERR_MORE_PREAUTH_DATA_REQUIRED)
|
|
return KRB5_PREAUTH_FAILED;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
cookie = malloc(pad->padata_value.length);
|
|
if (cookie == NULL)
|
|
return krb5_enomem(context);
|
|
|
|
memcpy(cookie, pad->padata_value.data, pad->padata_value.length);
|
|
|
|
ret = krb5_padata_add(context, out_md, KRB5_PADATA_FX_COOKIE,
|
|
cookie, pad->padata_value.length);
|
|
if (ret)
|
|
free(cookie);
|
|
else
|
|
_krb5_debug(context, 5, "Mirrored FX-COOKIE to KDC");
|
|
|
|
return ret;
|
|
}
|
|
|
|
typedef struct pa_info_data *(*pa_salt_info_f)(krb5_context, const krb5_principal, const AS_REQ *, struct pa_info_data *, heim_octet_string *);
|
|
typedef krb5_error_code (*pa_configure_f)(krb5_context, krb5_init_creds_context, void *);
|
|
typedef krb5_error_code (*pa_restart_f)(krb5_context, krb5_init_creds_context, void *);
|
|
typedef krb5_error_code (*pa_step_f)(krb5_context, krb5_init_creds_context, void *, PA_DATA *, const AS_REQ *, const AS_REP *, METHOD_DATA *, METHOD_DATA *);
|
|
typedef void (*pa_release_f)(void *);
|
|
|
|
static const struct patype {
|
|
int type;
|
|
const char *name;
|
|
int flags;
|
|
#define PA_F_ANNOUNCE 1
|
|
#define PA_F_CONFIG 2
|
|
#define PA_F_FAST 4 /* available inside FAST */
|
|
#define PA_F_NOT_FAST 8 /* only available without FAST */
|
|
size_t pa_ctx_size;
|
|
pa_salt_info_f salt_info;
|
|
/**
|
|
* Return 0 if the PA-mechanism is available and optionally set pa_ctx pointer to non-NULL.
|
|
*/
|
|
pa_configure_f configure;
|
|
/**
|
|
* Return 0 if the PA-mechanism can be restarted (time skew, referrals, etc)
|
|
*/
|
|
pa_restart_f restart;
|
|
/**
|
|
* Return 0 when complete, HEIM_ERR_PA_CONTINUE_NEEDED if more steps are required
|
|
*/
|
|
pa_step_f step;
|
|
pa_release_f release;
|
|
} patypes[] = {
|
|
{
|
|
KRB5_PADATA_PK_AS_REP,
|
|
"PKINIT(IETF)",
|
|
PA_F_FAST | PA_F_NOT_FAST,
|
|
sizeof(struct pkinit_context),
|
|
NULL,
|
|
pkinit_configure_ietf,
|
|
NULL,
|
|
pkinit_step,
|
|
pkinit_release
|
|
},
|
|
{
|
|
KRB5_PADATA_PK_AS_REP_19,
|
|
"PKINIT(win)",
|
|
PA_F_FAST | PA_F_NOT_FAST,
|
|
sizeof(struct pkinit_context),
|
|
NULL,
|
|
pkinit_configure_win,
|
|
NULL,
|
|
pkinit_step,
|
|
pkinit_release
|
|
},
|
|
{
|
|
KRB5_PADATA_GSS,
|
|
"GSS",
|
|
PA_F_FAST | PA_F_NOT_FAST,
|
|
sizeof(struct pa_gss_context),
|
|
NULL,
|
|
pa_gss_configure,
|
|
pa_gss_restart,
|
|
pa_gss_step,
|
|
pa_gss_release
|
|
},
|
|
{
|
|
KRB5_PADATA_ENCRYPTED_CHALLENGE,
|
|
"ENCRYPTED_CHALLENGE",
|
|
PA_F_FAST,
|
|
0,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
enc_chal_step,
|
|
NULL
|
|
},
|
|
{
|
|
KRB5_PADATA_ENC_TIMESTAMP,
|
|
"ENCRYPTED_TIMESTAMP",
|
|
PA_F_NOT_FAST,
|
|
sizeof(struct enc_ts_context),
|
|
NULL,
|
|
NULL,
|
|
enc_ts_restart,
|
|
enc_ts_step,
|
|
enc_ts_release
|
|
},
|
|
{
|
|
KRB5_PADATA_PA_PAC_REQUEST,
|
|
"PA_PAC_REQUEST",
|
|
PA_F_CONFIG,
|
|
0,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
pa_pac_step,
|
|
NULL
|
|
},
|
|
{
|
|
KRB5_PADATA_REQ_ENC_PA_REP,
|
|
"REQ-ENC-PA-REP",
|
|
PA_F_CONFIG,
|
|
0,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
pa_enc_pa_rep_step,
|
|
NULL
|
|
},
|
|
{
|
|
KRB5_PADATA_FX_COOKIE,
|
|
"FX-COOKIE",
|
|
PA_F_CONFIG,
|
|
0,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
pa_fx_cookie_step,
|
|
NULL
|
|
},
|
|
#define patype_salt(n, f) { KRB5_PADATA_##n, #n, 0, 0, f, NULL, NULL, NULL, NULL }
|
|
patype_salt(ETYPE_INFO2, pa_etype_info2),
|
|
patype_salt(ETYPE_INFO, pa_etype_info),
|
|
patype_salt(PW_SALT, pa_pw_or_afs3_salt),
|
|
patype_salt(AFS3_SALT, pa_pw_or_afs3_salt),
|
|
#undef patype_salt
|
|
/* below are just for pretty printing */
|
|
#define patype_info(n) { KRB5_PADATA_##n, #n, 0, 0, NULL, NULL, NULL, NULL, NULL }
|
|
patype_info(AUTHENTICATION_SET),
|
|
patype_info(AUTH_SET_SELECTED),
|
|
patype_info(FX_FAST),
|
|
patype_info(FX_ERROR),
|
|
patype_info(PKINIT_KX),
|
|
patype_info(PK_AS_REQ)
|
|
#undef patype_info
|
|
};
|
|
|
|
static const char *
|
|
get_pa_type_name(int type)
|
|
{
|
|
size_t n;
|
|
for (n = 0; n < sizeof(patypes)/sizeof(patypes[0]); n++)
|
|
if (type == patypes[n].type)
|
|
return patypes[n].name;
|
|
return "unknown";
|
|
}
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
struct pa_auth_mech {
|
|
const struct patype *patype;
|
|
struct pa_auth_mech *next; /* when doing authentication sets */
|
|
char pactx[1];
|
|
};
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
static struct pa_info_data *
|
|
process_pa_info(krb5_context context,
|
|
const krb5_principal client,
|
|
const AS_REQ *asreq,
|
|
struct pa_info_data *paid,
|
|
METHOD_DATA *md)
|
|
{
|
|
struct pa_info_data *p = NULL;
|
|
PA_DATA *pa;
|
|
size_t i;
|
|
|
|
if (md == NULL)
|
|
return NULL;
|
|
|
|
for (i = 0; p == NULL && i < sizeof(patypes)/sizeof(patypes[0]); i++) {
|
|
int idx = 0;
|
|
|
|
if (patypes[i].salt_info == NULL)
|
|
continue;
|
|
|
|
pa = krb5_find_padata(md->val, md->len, patypes[i].type, &idx);
|
|
if (pa == NULL)
|
|
continue;
|
|
|
|
paid->salt.salttype = (krb5_salttype)patypes[i].type;
|
|
p = patypes[i].salt_info(context, client, asreq, paid, &pa->padata_value);
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static krb5_error_code
|
|
pa_announce(krb5_context context,
|
|
int types,
|
|
krb5_init_creds_context ctx,
|
|
METHOD_DATA *in_md,
|
|
METHOD_DATA *out_md)
|
|
{
|
|
krb5_error_code ret = 0;
|
|
size_t n;
|
|
|
|
for (n = 0; ret == 0 && n < sizeof(patypes)/sizeof(patypes[0]); n++) {
|
|
if ((patypes[n].flags & types) == 0)
|
|
continue;
|
|
|
|
if (patypes[n].step)
|
|
patypes[n].step(context, ctx, NULL, NULL, NULL, NULL, in_md, out_md);
|
|
else
|
|
ret = krb5_padata_add(context, out_md, patypes[n].type, NULL, 0);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
static void HEIM_CALLCONV
|
|
mech_dealloc(void *ctx)
|
|
{
|
|
struct pa_auth_mech *pa_mech = ctx;
|
|
if (pa_mech->patype->release)
|
|
pa_mech->patype->release((void *)&pa_mech->pactx[0]);
|
|
}
|
|
|
|
static const struct heim_type_data pa_auth_mech_object = {
|
|
HEIM_TID_PA_AUTH_MECH,
|
|
"heim-pa-mech-context",
|
|
NULL,
|
|
mech_dealloc,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
static struct pa_auth_mech *
|
|
pa_mech_create(krb5_context context, krb5_init_creds_context ctx, int pa_type)
|
|
{
|
|
struct pa_auth_mech *pa_mech;
|
|
const struct patype *patype = NULL;
|
|
size_t n;
|
|
|
|
for (n = 0; patype == NULL && n < sizeof(patypes)/sizeof(patypes[0]); n++) {
|
|
if (patypes[n].type == pa_type)
|
|
patype = &patypes[n];
|
|
}
|
|
if (patype == NULL)
|
|
return NULL;
|
|
|
|
pa_mech = _heim_alloc_object(&pa_auth_mech_object, sizeof(*pa_mech) - 1 + patype->pa_ctx_size);
|
|
if (pa_mech == NULL)
|
|
return NULL;
|
|
|
|
pa_mech->patype = patype;
|
|
|
|
if (pa_mech->patype->configure) {
|
|
krb5_error_code ret;
|
|
|
|
ret = pa_mech->patype->configure(context, ctx, &pa_mech->pactx[0]);
|
|
if (ret) {
|
|
heim_release(pa_mech);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
_krb5_debug(context, 5, "Adding PA mech: %s", patype->name);
|
|
|
|
return pa_mech;
|
|
}
|
|
|
|
static void
|
|
pa_mech_add(krb5_context context, krb5_init_creds_context ctx, int pa_type)
|
|
{
|
|
struct pa_auth_mech *mech;
|
|
|
|
mech = pa_mech_create(context, ctx, pa_type);
|
|
if (mech) {
|
|
heim_array_append_value(ctx->available_pa_mechs, mech);
|
|
heim_release(mech);
|
|
}
|
|
}
|
|
|
|
static krb5_error_code
|
|
pa_configure(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
METHOD_DATA *in_md)
|
|
{
|
|
ctx->available_pa_mechs = heim_array_create();
|
|
|
|
if (ctx->gss_init_ctx) {
|
|
pa_mech_add(context, ctx, KRB5_PADATA_GSS);
|
|
} else if (ctx->pk_init_ctx) {
|
|
pa_mech_add(context, ctx, KRB5_PADATA_PK_AS_REP);
|
|
pa_mech_add(context, ctx, KRB5_PADATA_PK_AS_REP_19);
|
|
} else if (ctx->keyproc || ctx->keyseed || ctx->prompter) {
|
|
pa_mech_add(context, ctx, KRB5_PADATA_ENCRYPTED_CHALLENGE);
|
|
pa_mech_add(context, ctx, KRB5_PADATA_ENC_TIMESTAMP);
|
|
}
|
|
/* XXX setup context based on KDC reply */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
pa_restart(krb5_context context,
|
|
krb5_init_creds_context ctx)
|
|
{
|
|
krb5_error_code ret = HEIM_ERR_PA_CANT_CONTINUE;
|
|
|
|
if (ctx->pa_mech && ctx->pa_mech->patype->restart)
|
|
ret = ctx->pa_mech->patype->restart(context, ctx, (void *)&ctx->pa_mech->pactx[0]);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static krb5_error_code
|
|
pa_step(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
const AS_REQ *a,
|
|
const AS_REP *rep,
|
|
METHOD_DATA *in_md,
|
|
METHOD_DATA *out_md)
|
|
{
|
|
krb5_error_code ret;
|
|
PA_DATA *pa = NULL;
|
|
int idx;
|
|
|
|
next:
|
|
do {
|
|
if (ctx->pa_mech == NULL) {
|
|
size_t len = heim_array_get_length(ctx->available_pa_mechs);
|
|
if (len == 0) {
|
|
_krb5_debug(context, 0, "no more available_pa_mechs to try");
|
|
return HEIM_ERR_NO_MORE_PA_MECHS;
|
|
}
|
|
|
|
ctx->pa_mech = heim_array_copy_value(ctx->available_pa_mechs, 0);
|
|
heim_array_delete_value(ctx->available_pa_mechs, 0);
|
|
}
|
|
|
|
if (ctx->fast_state.armor_crypto) {
|
|
if ((ctx->pa_mech->patype->flags & PA_F_FAST) == 0) {
|
|
_krb5_debug(context, 0, "pa-mech %s dropped under FAST (not supported)",
|
|
ctx->pa_mech->patype->name);
|
|
heim_release(ctx->pa_mech);
|
|
ctx->pa_mech = NULL;
|
|
continue;
|
|
}
|
|
} else {
|
|
if ((ctx->pa_mech->patype->flags & PA_F_NOT_FAST) == 0) {
|
|
_krb5_debug(context, 0, "dropped pa-mech %s since not running under FAST",
|
|
ctx->pa_mech->patype->name);
|
|
heim_release(ctx->pa_mech);
|
|
ctx->pa_mech = NULL;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
_krb5_debug(context, 0, "pa-mech trying: %s, searching for %d",
|
|
ctx->pa_mech->patype->name, ctx->pa_mech->patype->type);
|
|
|
|
idx = 0;
|
|
if (in_md)
|
|
pa = krb5_find_padata(in_md->val, in_md->len, ctx->pa_mech->patype->type, &idx);
|
|
else
|
|
pa = NULL;
|
|
|
|
} while (ctx->pa_mech == NULL);
|
|
|
|
_krb5_debug(context, 5, "Stepping pa-mech: %s", ctx->pa_mech->patype->name);
|
|
|
|
ret = ctx->pa_mech->patype->step(context, ctx, (void *)&ctx->pa_mech->pactx[0], pa, a, rep, in_md, out_md);
|
|
_krb5_debug(context, 10, "PA type %s returned %d", ctx->pa_mech->patype->name, ret);
|
|
if (ret == 0) {
|
|
struct pa_auth_mech *next_pa = ctx->pa_mech->next;
|
|
|
|
if (next_pa) {
|
|
_krb5_debug(context, 5, "Next PA type in set is: %s",
|
|
next_pa->patype->name);
|
|
ret = HEIM_ERR_PA_CONTINUE_NEEDED;
|
|
} else if (rep == NULL) {
|
|
_krb5_debug(context, 5, "PA %s done, but no ticket in sight!!!",
|
|
ctx->pa_mech->patype->name);
|
|
ret = HEIM_ERR_PA_CANT_CONTINUE;
|
|
} else {
|
|
ctx->pa_used = ctx->pa_mech->patype->name;
|
|
}
|
|
|
|
heim_retain(next_pa);
|
|
heim_release(ctx->pa_mech);
|
|
ctx->pa_mech = next_pa;
|
|
}
|
|
|
|
if (ret == HEIM_ERR_PA_CANT_CONTINUE) {
|
|
if (ctx->pa_mech) {
|
|
_krb5_debug(context, 5, "Dropping PA type %s", ctx->pa_mech->patype->name);
|
|
heim_release(ctx->pa_mech);
|
|
ctx->pa_mech = NULL;
|
|
}
|
|
goto next;
|
|
} else if (ret == HEIM_ERR_PA_CONTINUE_NEEDED) {
|
|
_krb5_debug(context, 5, "Continue needed for %s", ctx->pa_mech->patype->name);
|
|
} else if (ret != 0) {
|
|
_krb5_debug(context, 5, "Other error from mech %s: %d", ctx->pa_mech->patype->name, ret);
|
|
heim_release(ctx->pa_mech);
|
|
ctx->pa_mech = NULL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
log_kdc_pa_types(krb5_context context, METHOD_DATA *in_md)
|
|
{
|
|
if (_krb5_have_debug(context, 5)) {
|
|
unsigned i;
|
|
_krb5_debug(context, 5, "KDC sent %d patypes", in_md->len);
|
|
for (i = 0; i < in_md->len; i++)
|
|
_krb5_debug(context, 5, "KDC sent PA-DATA type: %d (%s)",
|
|
in_md->val[i].padata_type,
|
|
get_pa_type_name(in_md->val[i].padata_type));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Assumes caller always will free `out_md', even on error.
|
|
*/
|
|
|
|
static krb5_error_code
|
|
process_pa_data_to_md(krb5_context context,
|
|
const krb5_creds *creds,
|
|
const AS_REQ *a,
|
|
krb5_init_creds_context ctx,
|
|
METHOD_DATA *in_md,
|
|
METHOD_DATA **out_md)
|
|
{
|
|
krb5_error_code ret;
|
|
|
|
ALLOC(*out_md, 1);
|
|
if (*out_md == NULL) {
|
|
return krb5_enomem(context);
|
|
}
|
|
(*out_md)->len = 0;
|
|
(*out_md)->val = NULL;
|
|
|
|
log_kdc_pa_types(context, in_md);
|
|
|
|
ret = pa_step(context, ctx, a, NULL, in_md, *out_md);
|
|
if (ret == HEIM_ERR_PA_CONTINUE_NEEDED) {
|
|
_krb5_debug(context, 0, "pamech need more stepping");
|
|
} else if (ret == 0) {
|
|
_krb5_debug(context, 0, "pamech done step");
|
|
} else {
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Send announcement (what we support) and configuration (user
|
|
* introduced behavior change)
|
|
*/
|
|
ret = pa_announce(context, PA_F_ANNOUNCE|PA_F_CONFIG, ctx, in_md, *out_md);
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
if ((*out_md)->len == 0) {
|
|
free(*out_md);
|
|
*out_md = NULL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code
|
|
process_pa_data_to_key(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
krb5_creds *creds,
|
|
AS_REQ *a,
|
|
AS_REP *rep,
|
|
krb5_keyblock **key)
|
|
{
|
|
struct pa_info_data paid, *ppaid = NULL;
|
|
krb5_error_code ret;
|
|
krb5_enctype etype = rep->enc_part.etype;
|
|
|
|
memset(&paid, 0, sizeof(paid));
|
|
|
|
if (rep->padata)
|
|
log_kdc_pa_types(context, rep->padata);
|
|
|
|
if (rep->padata) {
|
|
paid.etype = etype;
|
|
ppaid = process_pa_info(context, creds->client, a, &paid,
|
|
rep->padata);
|
|
}
|
|
if (ppaid == NULL) {
|
|
if (ctx->paid.etype == KRB5_ENCTYPE_NULL) {
|
|
ctx->paid.etype = etype;
|
|
ctx->paid.s2kparams = NULL;
|
|
ret = krb5_get_pw_salt (context, creds->client, &ctx->paid.salt);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ret = pa_step(context, ctx, a, rep, rep->padata, NULL);
|
|
if (ret == HEIM_ERR_PA_CONTINUE_NEEDED) {
|
|
_krb5_debug(context, 0, "In final stretch and pa require more stepping ?");
|
|
return ret;
|
|
} else if (ret == 0) {
|
|
_krb5_debug(context, 0, "final pamech done step");
|
|
goto out;
|
|
} else {
|
|
return ret;
|
|
}
|
|
out:
|
|
free_paid(context, &paid);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
static krb5_error_code
|
|
capture_lkdc_domain(krb5_context context,
|
|
krb5_init_creds_context ctx)
|
|
{
|
|
size_t len;
|
|
|
|
len = strlen(_krb5_wellknown_lkdc);
|
|
|
|
if (ctx->kdc_hostname != NULL ||
|
|
strncmp(ctx->cred.client->realm, _krb5_wellknown_lkdc, len) != 0 ||
|
|
ctx->cred.client->realm[len] != ':')
|
|
return 0;
|
|
|
|
ctx->kdc_hostname = strdup(&ctx->cred.client->realm[len + 1]);
|
|
|
|
_krb5_debug(context, 5, "krb5_get_init_creds: setting LKDC hostname to: %s",
|
|
ctx->kdc_hostname);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Start a new context to get a new initial credential.
|
|
*
|
|
* @param context A Kerberos 5 context.
|
|
* @param client The Kerberos principal to get the credential for, if
|
|
* NULL is given, the default principal is used as determined by
|
|
* krb5_get_default_principal().
|
|
* @param prompter
|
|
* @param prompter_data
|
|
* @param start_time the time the ticket should start to be valid or 0 for now.
|
|
* @param options a options structure, can be NULL for default options.
|
|
* @param rctx A new allocated free with krb5_init_creds_free().
|
|
*
|
|
* @return 0 for success or an Kerberos 5 error code, see krb5_get_error_message().
|
|
*
|
|
* @ingroup krb5_credential
|
|
*/
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_init_creds_init(krb5_context context,
|
|
krb5_principal client,
|
|
krb5_prompter_fct prompter,
|
|
void *prompter_data,
|
|
krb5_deltat start_time,
|
|
krb5_get_init_creds_opt *options,
|
|
krb5_init_creds_context *rctx)
|
|
{
|
|
krb5_init_creds_context ctx;
|
|
krb5_error_code ret;
|
|
|
|
*rctx = NULL;
|
|
|
|
ctx = calloc(1, sizeof(*ctx));
|
|
if (ctx == NULL)
|
|
return krb5_enomem(context);
|
|
|
|
ret = get_init_creds_common(context, client, prompter, prompter_data,
|
|
start_time, options, ctx);
|
|
if (ret) {
|
|
free(ctx);
|
|
return ret;
|
|
}
|
|
|
|
/* Set a new nonce. */
|
|
/* FIXME should generate a new nonce for each AS-REQ */
|
|
krb5_generate_random_block (&ctx->nonce, sizeof(ctx->nonce));
|
|
ctx->nonce &= 0x7fffffff;
|
|
/* XXX these just need to be the same when using Windows PK-INIT */
|
|
ctx->pk_nonce = ctx->nonce;
|
|
|
|
ctx->prompter = prompter;
|
|
ctx->prompter_data = prompter_data;
|
|
|
|
/* pick up hostname from LKDC realm name */
|
|
ret = capture_lkdc_domain(context, ctx);
|
|
if (ret) {
|
|
free_init_creds_ctx(context, ctx);
|
|
return ret;
|
|
}
|
|
|
|
ctx->runflags.allow_enc_pa_rep = 1;
|
|
|
|
ctx->fast_state.flags |= KRB5_FAST_AS_REQ;
|
|
|
|
*rctx = ctx;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Set the KDC hostname for the initial request, it will not be
|
|
* considered in referrals to another KDC.
|
|
*
|
|
* @param context a Kerberos 5 context.
|
|
* @param ctx a krb5_init_creds_context context.
|
|
* @param hostname the hostname for the KDC of realm
|
|
*
|
|
* @return 0 for success, or an Kerberos 5 error code, see krb5_get_error_message().
|
|
* @ingroup krb5_credential
|
|
*/
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_init_creds_set_kdc_hostname(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
const char *hostname)
|
|
{
|
|
if (ctx->kdc_hostname)
|
|
free(ctx->kdc_hostname);
|
|
ctx->kdc_hostname = strdup(hostname);
|
|
if (ctx->kdc_hostname == NULL)
|
|
return krb5_enomem(context);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Set the sitename for the request
|
|
*
|
|
*/
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_init_creds_set_sitename(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
const char *sitename)
|
|
{
|
|
if (ctx->sitename)
|
|
free(ctx->sitename);
|
|
ctx->sitename = strdup(sitename);
|
|
if (ctx->sitename == NULL)
|
|
return krb5_enomem(context);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Sets the service that the is requested. This call is only neede for
|
|
* special initial tickets, by default the a krbtgt is fetched in the default realm.
|
|
*
|
|
* @param context a Kerberos 5 context.
|
|
* @param ctx a krb5_init_creds_context context.
|
|
* @param service the service given as a string, for example
|
|
* "kadmind/admin". If NULL, the default krbtgt in the clients
|
|
* realm is set.
|
|
*
|
|
* @return 0 for success, or an Kerberos 5 error code, see krb5_get_error_message().
|
|
* @ingroup krb5_credential
|
|
*/
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_init_creds_set_service(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
const char *service)
|
|
{
|
|
krb5_const_realm client_realm;
|
|
krb5_principal principal;
|
|
krb5_error_code ret;
|
|
|
|
client_realm = krb5_principal_get_realm (context, ctx->cred.client);
|
|
|
|
if (service) {
|
|
ret = krb5_parse_name (context, service, &principal);
|
|
if (ret)
|
|
return ret;
|
|
ret = krb5_principal_set_realm (context, principal, client_realm);
|
|
if (ret) {
|
|
krb5_free_principal(context, principal);
|
|
return ret;
|
|
}
|
|
} else {
|
|
ret = krb5_make_principal(context, &principal,
|
|
client_realm, KRB5_TGS_NAME, client_realm,
|
|
NULL);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* This is for Windows RODC that are picky about what name type
|
|
* the server principal have, and the really strange part is that
|
|
* they are picky about the AS-REQ name type and not the TGS-REQ
|
|
* later. Oh well.
|
|
*/
|
|
|
|
if (krb5_principal_is_krbtgt(context, principal))
|
|
krb5_principal_set_type(context, principal, KRB5_NT_SRV_INST);
|
|
|
|
krb5_free_principal(context, ctx->cred.server);
|
|
ctx->cred.server = principal;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Sets the password that will use for the request.
|
|
*
|
|
* @param context a Kerberos 5 context.
|
|
* @param ctx ctx krb5_init_creds_context context.
|
|
* @param password the password to use.
|
|
*
|
|
* @return 0 for success, or an Kerberos 5 error code, see krb5_get_error_message().
|
|
* @ingroup krb5_credential
|
|
*/
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_init_creds_set_password(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
const char *password)
|
|
{
|
|
if (ctx->password) {
|
|
size_t len;
|
|
len = strlen(ctx->password);
|
|
memset_s(ctx->password, len, 0, len);
|
|
free(ctx->password);
|
|
}
|
|
if (password) {
|
|
ctx->password = strdup(password);
|
|
if (ctx->password == NULL)
|
|
return krb5_enomem(context);
|
|
ctx->keyseed = (void *) ctx->password;
|
|
} else {
|
|
ctx->keyseed = NULL;
|
|
ctx->password = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
keytab_key_proc(krb5_context context, krb5_enctype enctype,
|
|
krb5_const_pointer keyseed,
|
|
krb5_salt salt, krb5_data *s2kparms,
|
|
krb5_keyblock **key)
|
|
{
|
|
krb5_keytab_key_proc_args *args = rk_UNCONST(keyseed);
|
|
krb5_keytab keytab = args->keytab;
|
|
krb5_principal principal = args->principal;
|
|
krb5_error_code ret;
|
|
krb5_keytab real_keytab = NULL;
|
|
krb5_keytab_entry entry;
|
|
|
|
if (keytab == NULL) {
|
|
ret = krb5_kt_default(context, &real_keytab);
|
|
if (ret)
|
|
return ret;
|
|
keytab = real_keytab;
|
|
}
|
|
|
|
ret = krb5_kt_get_entry (context, keytab, principal, 0, enctype, &entry);
|
|
if (ret == 0) {
|
|
ret = krb5_copy_keyblock(context, &entry.keyblock, key);
|
|
krb5_kt_free_entry(context, &entry);
|
|
}
|
|
|
|
krb5_kt_close(context, real_keytab);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* Set the keytab to use for authentication.
|
|
*
|
|
* @param context a Kerberos 5 context.
|
|
* @param ctx ctx krb5_init_creds_context context.
|
|
* @param keytab the keytab to read the key from.
|
|
*
|
|
* @return 0 for success, or an Kerberos 5 error code, see krb5_get_error_message().
|
|
* @ingroup krb5_credential
|
|
*/
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_init_creds_set_keytab(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
krb5_keytab keytab)
|
|
{
|
|
krb5_keytab_key_proc_args *a;
|
|
krb5_keytab_entry entry;
|
|
krb5_kt_cursor cursor;
|
|
krb5_enctype *etypes = NULL;
|
|
krb5_error_code ret;
|
|
size_t netypes = 0;
|
|
int kvno = 0, found = 0;
|
|
unsigned n;
|
|
|
|
a = malloc(sizeof(*a));
|
|
if (a == NULL)
|
|
return krb5_enomem(context);
|
|
|
|
a->principal = ctx->cred.client;
|
|
a->keytab = keytab;
|
|
|
|
ctx->keytab_data = a;
|
|
ctx->keyseed = (void *)a;
|
|
ctx->keyproc = keytab_key_proc;
|
|
|
|
/*
|
|
* We need to tell the KDC what enctypes we support for this keytab,
|
|
* especially if the keytab is really a password based entry, then the
|
|
* KDC might have more enctypes in the database then what we have
|
|
* in the keytab.
|
|
*/
|
|
|
|
ret = krb5_kt_start_seq_get(context, keytab, &cursor);
|
|
if(ret)
|
|
goto out;
|
|
|
|
while(krb5_kt_next_entry(context, keytab, &entry, &cursor) == 0){
|
|
void *ptr;
|
|
|
|
if (!krb5_principal_compare(context, entry.principal, ctx->cred.client))
|
|
goto next;
|
|
|
|
found = 1;
|
|
|
|
/* check if we have this kvno already */
|
|
if (entry.vno > kvno) {
|
|
/* remove old list of etype */
|
|
if (etypes)
|
|
free(etypes);
|
|
etypes = NULL;
|
|
netypes = 0;
|
|
kvno = entry.vno;
|
|
} else if (entry.vno != kvno)
|
|
goto next;
|
|
|
|
/* check if enctype is supported */
|
|
if (krb5_enctype_valid(context, entry.keyblock.keytype) != 0)
|
|
goto next;
|
|
|
|
/*
|
|
* If user already provided a enctype list, use that as an
|
|
* additonal filter.
|
|
*/
|
|
if (ctx->etypes) {
|
|
for (n = 0; ctx->etypes[n] != KRB5_ENCTYPE_NULL; n++) {
|
|
if (ctx->etypes[n] == entry.keyblock.keytype)
|
|
break;
|
|
}
|
|
if (ctx->etypes[n] == KRB5_ENCTYPE_NULL)
|
|
goto next;
|
|
}
|
|
|
|
/* add enctype to supported list */
|
|
ptr = realloc(etypes, sizeof(etypes[0]) * (netypes + 2));
|
|
if (ptr == NULL) {
|
|
free(etypes);
|
|
ret = krb5_enomem(context);
|
|
goto out;
|
|
}
|
|
|
|
etypes = ptr;
|
|
etypes[netypes] = entry.keyblock.keytype;
|
|
etypes[netypes + 1] = ETYPE_NULL;
|
|
netypes++;
|
|
next:
|
|
krb5_kt_free_entry(context, &entry);
|
|
}
|
|
krb5_kt_end_seq_get(context, keytab, &cursor);
|
|
|
|
if (etypes) {
|
|
if (ctx->etypes)
|
|
free(ctx->etypes);
|
|
ctx->etypes = etypes;
|
|
}
|
|
|
|
out:
|
|
if (!found) {
|
|
if (ret == 0)
|
|
ret = KRB5_KT_NOTFOUND;
|
|
_krb5_kt_principal_not_found(context, ret, keytab, ctx->cred.client, 0, 0);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code KRB5_CALLCONV
|
|
keyblock_key_proc(krb5_context context, krb5_enctype enctype,
|
|
krb5_const_pointer keyseed,
|
|
krb5_salt salt, krb5_data *s2kparms,
|
|
krb5_keyblock **key)
|
|
{
|
|
return krb5_copy_keyblock (context, keyseed, key);
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_init_creds_set_keyblock(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
krb5_keyblock *keyblock)
|
|
{
|
|
ctx->keyseed = (void *)keyblock;
|
|
ctx->keyproc = keyblock_key_proc;
|
|
|
|
return 0;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_init_creds_set_fast_ccache(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
krb5_ccache fast_ccache)
|
|
{
|
|
ctx->fast_state.armor_ccache = fast_ccache;
|
|
ctx->fast_state.flags |= KRB5_FAST_REQUIRED;
|
|
ctx->fast_state.flags |= KRB5_FAST_KDC_VERIFIED;
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
validate_pkinit_fx(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
AS_REP *rep,
|
|
krb5_keyblock *ticket_sessionkey)
|
|
{
|
|
PA_DATA *pa = NULL;
|
|
int idx = 0;
|
|
|
|
if (rep->padata)
|
|
pa = krb5_find_padata(rep->padata->val, rep->padata->len, KRB5_PADATA_PKINIT_KX, &idx);
|
|
|
|
if (pa == NULL) {
|
|
if (ctx->flags.request_anonymous && ctx->pk_init_ctx) {
|
|
/* XXX handle the case where pkinit is not used */
|
|
krb5_set_error_message(context, KRB5_KDCREP_MODIFIED,
|
|
N_("Requested anonymous with PKINIT and KDC didn't set PKINIT_KX", ""));
|
|
return KRB5_KDCREP_MODIFIED;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
heim_assert(ctx->fast_state.reply_key != NULL, "must have a reply key at this stage");
|
|
|
|
return _krb5_pk_kx_confirm(context,
|
|
ctx->pk_init_ctx,
|
|
ctx->fast_state.reply_key,
|
|
ticket_sessionkey,
|
|
pa);
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_init_creds_set_fast_ap_armor_service(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
krb5_const_principal armor_service)
|
|
{
|
|
krb5_error_code ret;
|
|
|
|
if (ctx->fast_state.armor_service)
|
|
krb5_free_principal(context, ctx->fast_state.armor_service);
|
|
if (armor_service) {
|
|
ret = krb5_copy_principal(context, armor_service, &ctx->fast_state.armor_service);
|
|
if (ret)
|
|
return ret;
|
|
} else {
|
|
ctx->fast_state.armor_service = NULL;
|
|
}
|
|
ctx->fast_state.flags |= KRB5_FAST_AP_ARMOR_SERVICE;
|
|
return 0;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_init_creds_set_fast_anon_pkinit(krb5_context context,
|
|
krb5_init_creds_context ctx)
|
|
{
|
|
if (ctx->fast_state.armor_ccache)
|
|
return EINVAL;
|
|
|
|
ctx->fast_state.flags |= KRB5_FAST_REQUIRED;
|
|
ctx->fast_state.flags |= KRB5_FAST_ANON_PKINIT_ARMOR;
|
|
return 0;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
_krb5_init_creds_set_fast_anon_pkinit_optimistic(krb5_context context,
|
|
krb5_init_creds_context ctx)
|
|
{
|
|
if (ctx->fast_state.armor_ccache)
|
|
return EINVAL;
|
|
|
|
ctx->fast_state.flags |= KRB5_FAST_REQUIRED;
|
|
ctx->fast_state.flags |= KRB5_FAST_ANON_PKINIT_ARMOR;
|
|
ctx->fast_state.flags |= KRB5_FAST_OPTIMISTIC;
|
|
return 0;
|
|
}
|
|
|
|
static size_t
|
|
available_padata_count(METHOD_DATA *md)
|
|
{
|
|
size_t i, count = 0;
|
|
|
|
for (i = 0; i < md->len; i++) {
|
|
PA_DATA *pa = &md->val[i];
|
|
|
|
if (pa->padata_type == KRB5_PADATA_FX_COOKIE ||
|
|
pa->padata_type == KRB5_PADATA_FX_ERROR)
|
|
continue;
|
|
|
|
count++;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static krb5_error_code
|
|
init_creds_step(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
const krb5_data *in,
|
|
krb5_data *out,
|
|
krb5_realm *out_realm,
|
|
unsigned int *flags)
|
|
{
|
|
struct timeval start_time, end_time;
|
|
krb5_data checksum_data;
|
|
krb5_error_code ret;
|
|
size_t len = 0;
|
|
size_t size;
|
|
AS_REQ req2;
|
|
|
|
gettimeofday(&start_time, NULL);
|
|
|
|
krb5_data_zero(out);
|
|
*out_realm = NULL;
|
|
krb5_data_zero(&checksum_data);
|
|
|
|
if (ctx->as_req.req_body.cname == NULL) {
|
|
ret = init_as_req(context, ctx->flags, &ctx->cred,
|
|
ctx->addrs, ctx->etypes, &ctx->as_req);
|
|
if (ret)
|
|
return ret;
|
|
if (ctx->fast_state.flags & KRB5_FAST_REQUIRED)
|
|
;
|
|
else if (ctx->fast_state.flags & KRB5_FAST_AP_ARMOR_SERVICE)
|
|
/* Check with armor service if there is FAST */;
|
|
else
|
|
ctx->fast_state.flags |= KRB5_FAST_DISABLED;
|
|
|
|
|
|
/* XXX should happen after we get back reply from KDC */
|
|
pa_configure(context, ctx, NULL);
|
|
}
|
|
|
|
#define MAX_PA_COUNTER 15
|
|
if (ctx->pa_counter > MAX_PA_COUNTER) {
|
|
krb5_set_error_message(context, KRB5_GET_IN_TKT_LOOP,
|
|
N_("Looping %d times while getting "
|
|
"initial credentials", ""),
|
|
ctx->pa_counter);
|
|
return KRB5_GET_IN_TKT_LOOP;
|
|
}
|
|
ctx->pa_counter++;
|
|
|
|
_krb5_debug(context, 5, "krb5_get_init_creds: loop %d", ctx->pa_counter);
|
|
|
|
/* Lets process the input packet */
|
|
if (in && in->length) {
|
|
krb5_kdc_rep rep;
|
|
|
|
memset(&rep, 0, sizeof(rep));
|
|
|
|
_krb5_debug(context, 5, "krb5_get_init_creds: processing input");
|
|
|
|
ret = decode_AS_REP(in->data, in->length, &rep.kdc_rep, &size);
|
|
if (ret == 0) {
|
|
unsigned eflags = EXTRACT_TICKET_AS_REQ | EXTRACT_TICKET_TIMESYNC;
|
|
krb5_data data;
|
|
|
|
/*
|
|
* Unwrap AS-REP
|
|
*/
|
|
ASN1_MALLOC_ENCODE(Ticket, data.data, data.length,
|
|
&rep.kdc_rep.ticket, &size, ret);
|
|
if (ret)
|
|
goto out;
|
|
heim_assert(data.length == size, "ASN.1 internal error");
|
|
|
|
ret = _krb5_fast_unwrap_kdc_rep(context, ctx->nonce, &data,
|
|
&ctx->fast_state, &rep.kdc_rep);
|
|
krb5_data_free(&data);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/*
|
|
* Now check and extract the ticket
|
|
*/
|
|
|
|
if (ctx->flags.canonicalize) {
|
|
eflags |= EXTRACT_TICKET_ALLOW_SERVER_MISMATCH;
|
|
eflags |= EXTRACT_TICKET_MATCH_REALM;
|
|
}
|
|
if (ctx->ic_flags & KRB5_INIT_CREDS_NO_C_CANON_CHECK)
|
|
eflags |= EXTRACT_TICKET_ALLOW_CNAME_MISMATCH;
|
|
if (ctx->flags.request_anonymous)
|
|
eflags |= EXTRACT_TICKET_MATCH_ANON;
|
|
|
|
ret = process_pa_data_to_key(context, ctx, &ctx->cred,
|
|
&ctx->as_req, &rep.kdc_rep,
|
|
&ctx->fast_state.reply_key);
|
|
if (ret) {
|
|
free_AS_REP(&rep.kdc_rep);
|
|
goto out;
|
|
}
|
|
|
|
if (ctx->fast_state.strengthen_key) {
|
|
krb5_keyblock result;
|
|
|
|
_krb5_debug(context, 5, "krb5_get_init_creds: FAST strengthen_key");
|
|
|
|
ret = _krb5_fast_cf2(context,
|
|
ctx->fast_state.strengthen_key,
|
|
"strengthenkey",
|
|
ctx->fast_state.reply_key,
|
|
"replykey",
|
|
&result,
|
|
NULL);
|
|
if (ret) {
|
|
free_AS_REP(&rep.kdc_rep);
|
|
goto out;
|
|
}
|
|
|
|
ctx->runflags.allow_save_as_reply_key = 1;
|
|
|
|
krb5_free_keyblock_contents(context, ctx->fast_state.reply_key);
|
|
*ctx->fast_state.reply_key = result;
|
|
}
|
|
|
|
_krb5_debug(context, 5, "krb5_get_init_creds: extracting ticket");
|
|
|
|
ret = _krb5_extract_ticket(context,
|
|
&rep,
|
|
&ctx->cred,
|
|
ctx->fast_state.reply_key,
|
|
NULL,
|
|
KRB5_KU_AS_REP_ENC_PART,
|
|
NULL,
|
|
ctx->nonce,
|
|
eflags,
|
|
&ctx->req_buffer,
|
|
NULL,
|
|
NULL);
|
|
|
|
if (ret == 0)
|
|
ret = copy_EncKDCRepPart(&rep.enc_part, &ctx->enc_part);
|
|
if (ret == 0)
|
|
ret = validate_pkinit_fx(context, ctx, &rep.kdc_rep, &ctx->cred.session);
|
|
|
|
ctx->as_enctype = ctx->fast_state.reply_key->keytype;
|
|
|
|
if (ctx->runflags.allow_save_as_reply_key) {
|
|
ctx->as_reply_key = ctx->fast_state.reply_key;
|
|
ctx->fast_state.reply_key = NULL;
|
|
} else {
|
|
krb5_free_keyblock(context, ctx->fast_state.reply_key);
|
|
ctx->fast_state.reply_key = NULL;
|
|
}
|
|
ctx->ic_flags |= KRB5_INIT_CREDS_DONE;
|
|
*flags = 0;
|
|
|
|
free_AS_REP(&rep.kdc_rep);
|
|
free_EncASRepPart(&rep.enc_part);
|
|
|
|
gettimeofday(&end_time, NULL);
|
|
timevalsub(&end_time, &start_time);
|
|
timevaladd(&ctx->stats.run_time, &end_time);
|
|
|
|
_krb5_debug(context, 1, "krb5_get_init_creds: wc: %lld.%06ld",
|
|
(long long)ctx->stats.run_time.tv_sec,
|
|
(long)ctx->stats.run_time.tv_usec);
|
|
return ret;
|
|
|
|
} else {
|
|
/* let's try to parse it as a KRB-ERROR */
|
|
|
|
_krb5_debug(context, 5, "krb5_get_init_creds: got an KRB-ERROR from KDC");
|
|
|
|
free_KRB_ERROR(&ctx->error);
|
|
|
|
ret = krb5_rd_error(context, in, &ctx->error);
|
|
if(ret && in->length && ((char*)in->data)[0] == 4)
|
|
ret = KRB5KRB_AP_ERR_V4_REPLY;
|
|
if (ret) {
|
|
_krb5_debug(context, 5, "krb5_get_init_creds: failed to read error");
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Unwrap method-data, if there is any,
|
|
* fast_unwrap_error() below might replace it with a
|
|
* wrapped version if we are using FAST.
|
|
*/
|
|
|
|
free_METHOD_DATA(&ctx->md);
|
|
memset(&ctx->md, 0, sizeof(ctx->md));
|
|
|
|
if (ctx->error.e_data) {
|
|
krb5_error_code ret2;
|
|
|
|
ret2 = decode_METHOD_DATA(ctx->error.e_data->data,
|
|
ctx->error.e_data->length,
|
|
&ctx->md,
|
|
NULL);
|
|
if (ret2) {
|
|
/*
|
|
* Just ignore any error, the error will be pushed
|
|
* out from krb5_error_from_rd_error() if there
|
|
* was one.
|
|
*/
|
|
_krb5_debug(context, 5, N_("Failed to decode METHOD-DATA", ""));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Unwrap KRB-ERROR, we are always calling this so that
|
|
* FAST can tell us if your peer KDC suddenly dropped FAST
|
|
* wrapping and its really an attacker's packet (or a bug
|
|
* in the KDC).
|
|
*/
|
|
ret = _krb5_fast_unwrap_error(context, ctx->nonce, &ctx->fast_state,
|
|
&ctx->md, &ctx->error);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
ret = krb5_error_from_rd_error(context, &ctx->error, &ctx->cred);
|
|
|
|
/* log the failure */
|
|
if (_krb5_have_debug(context, 5)) {
|
|
const char *str = krb5_get_error_message(context, ret);
|
|
_krb5_debug(context, 5, "krb5_get_init_creds: KRB-ERROR %d/%s", ret, str);
|
|
krb5_free_error_message(context, str);
|
|
}
|
|
|
|
/*
|
|
* Handle special error codes
|
|
*/
|
|
|
|
if (ret == KRB5KDC_ERR_PREAUTH_REQUIRED
|
|
|| ret == KRB5_KDC_ERR_MORE_PREAUTH_DATA_REQUIRED
|
|
|| ret == KRB5KDC_ERR_ETYPE_NOSUPP)
|
|
{
|
|
/*
|
|
* If no preauth was set and KDC requires it, give it one
|
|
* more try.
|
|
*
|
|
* If the KDC returned KRB5KDC_ERR_ETYPE_NOSUPP, just loop
|
|
* one more time since that might mean we are dealing with
|
|
* a Windows KDC that is confused about what enctypes are
|
|
* available.
|
|
*/
|
|
|
|
if (available_padata_count(&ctx->md) == 0) {
|
|
krb5_set_error_message(context, ret,
|
|
N_("Preauth required but no preauth "
|
|
"options sent by KDC", ""));
|
|
goto out;
|
|
}
|
|
} else if (ret == KRB5KRB_AP_ERR_SKEW && context->kdc_sec_offset == 0) {
|
|
/*
|
|
* Try adapt to timeskrew when we are using pre-auth, and
|
|
* if there was a time skew, try again.
|
|
*/
|
|
krb5_set_real_time(context, ctx->error.stime, -1);
|
|
if (context->kdc_sec_offset)
|
|
ret = 0;
|
|
|
|
_krb5_debug(context, 10, "init_creds: err skew updating kdc offset to %d",
|
|
context->kdc_sec_offset);
|
|
if (ret)
|
|
goto out;
|
|
|
|
pa_restart(context, ctx);
|
|
|
|
} else if (ret == KRB5_KDC_ERR_WRONG_REALM && ctx->flags.canonicalize) {
|
|
/* client referral to a new realm */
|
|
char *ref_realm;
|
|
|
|
if (ctx->error.crealm == NULL) {
|
|
krb5_set_error_message(context, ret,
|
|
N_("Got a client referral, not but no realm", ""));
|
|
goto out;
|
|
}
|
|
ref_realm = *ctx->error.crealm;
|
|
|
|
_krb5_debug(context, 5, "krb5_get_init_creds: referral to realm %s",
|
|
ref_realm);
|
|
|
|
/*
|
|
* If its a krbtgt, lets update the requested krbtgt too
|
|
*/
|
|
if (krb5_principal_is_krbtgt(context, ctx->cred.server)) {
|
|
|
|
free(ctx->cred.server->name.name_string.val[1]);
|
|
ctx->cred.server->name.name_string.val[1] = strdup(ref_realm);
|
|
if (ctx->cred.server->name.name_string.val[1] == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto out;
|
|
}
|
|
|
|
free_PrincipalName(ctx->as_req.req_body.sname);
|
|
ret = _krb5_principal2principalname(ctx->as_req.req_body.sname, ctx->cred.server);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
free(ctx->as_req.req_body.realm);
|
|
ret = copy_Realm(&ref_realm, &ctx->as_req.req_body.realm);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = krb5_principal_set_realm(context,
|
|
ctx->cred.client,
|
|
*ctx->error.crealm);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = krb5_unparse_name(context, ctx->cred.client, &ref_realm);
|
|
if (ret == 0) {
|
|
_krb5_debug(context, 5, "krb5_get_init_creds: got referral to %s", ref_realm);
|
|
krb5_xfree(ref_realm);
|
|
}
|
|
|
|
pa_restart(context, ctx);
|
|
|
|
} else if (ret == KRB5KDC_ERR_KEY_EXP && ctx->runflags.change_password == 0 &&
|
|
ctx->runflags.change_password_prompt) {
|
|
char buf2[1024];
|
|
|
|
ctx->runflags.change_password = 1;
|
|
|
|
ctx->prompter(context, ctx->prompter_data, NULL, N_("Password has expired", ""), 0, NULL);
|
|
|
|
/* try to avoid recursion */
|
|
if (ctx->in_tkt_service != NULL && strcmp(ctx->in_tkt_service, "kadmin/changepw") == 0)
|
|
goto out;
|
|
|
|
/* don't include prompter in runtime */
|
|
gettimeofday(&end_time, NULL);
|
|
timevalsub(&end_time, &start_time);
|
|
timevaladd(&ctx->stats.run_time, &end_time);
|
|
|
|
ret = change_password(context,
|
|
ctx->cred.client,
|
|
ctx->password,
|
|
buf2,
|
|
sizeof(buf2),
|
|
ctx->prompter,
|
|
ctx->prompter_data,
|
|
NULL);
|
|
if (ret)
|
|
goto out;
|
|
|
|
gettimeofday(&start_time, NULL);
|
|
|
|
krb5_init_creds_set_password(context, ctx, buf2);
|
|
|
|
pa_restart(context, ctx);
|
|
|
|
} else if (ret == KRB5KDC_ERR_PREAUTH_FAILED) {
|
|
|
|
/*
|
|
* Old MIT KDC can't handle KRB5_PADATA_REQ_ENC_PA_REP,
|
|
* so drop it and try again. But only try that for MIT
|
|
* Kerberos servers by keying of no METHOD-DATA.
|
|
*/
|
|
if (ctx->runflags.allow_enc_pa_rep) {
|
|
if (ctx->md.len != 0) {
|
|
_krb5_debug(context, 10, "Server sent PA data with KRB-ERROR, "
|
|
"so not a pre 1.7 MIT KDC and won't retry w/o ENC-PA-REQ");
|
|
goto out;
|
|
}
|
|
_krb5_debug(context, 10, "Disabling allow_enc_pa_rep and trying again");
|
|
ctx->runflags.allow_enc_pa_rep = 0;
|
|
goto retry;
|
|
}
|
|
|
|
if (ctx->fast_state.flags & KRB5_FAST_DISABLED) {
|
|
_krb5_debug(context, 10, "FAST disabled and got preauth failed");
|
|
goto out;
|
|
}
|
|
|
|
retry:
|
|
pa_restart(context, ctx);
|
|
|
|
} else if (ctx->fast_state.flags & KRB5_FAST_OPTIMISTIC) {
|
|
_krb5_debug(context, 10,
|
|
"Some other error %d failed with optimistic FAST, trying w/o FAST", ret);
|
|
|
|
ctx->fast_state.flags &= ~KRB5_FAST_OPTIMISTIC;
|
|
ctx->fast_state.flags &= ~KRB5_FAST_REQUIRED;
|
|
ctx->fast_state.flags &= ~KRB5_FAST_ANON_PKINIT_ARMOR;
|
|
ctx->fast_state.flags |= KRB5_FAST_DISABLED;
|
|
pa_restart(context, ctx);
|
|
} else {
|
|
/* some other error code from the KDC, lets' return it to the user */
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (ctx->as_req.padata) {
|
|
free_METHOD_DATA(ctx->as_req.padata);
|
|
free(ctx->as_req.padata);
|
|
ctx->as_req.padata = NULL;
|
|
}
|
|
|
|
ret = _krb5_fast_create_armor(context, &ctx->fast_state,
|
|
ctx->cred.client->realm);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/* Set a new nonce. */
|
|
ctx->as_req.req_body.nonce = ctx->nonce;
|
|
|
|
|
|
/*
|
|
* Step and announce PA-DATA
|
|
*/
|
|
|
|
ret = process_pa_data_to_md(context, &ctx->cred, &ctx->as_req, ctx,
|
|
&ctx->md, &ctx->as_req.padata);
|
|
if (ret)
|
|
goto out;
|
|
|
|
|
|
/*
|
|
* Wrap with FAST
|
|
*/
|
|
ret = copy_AS_REQ(&ctx->as_req, &req2);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = _krb5_fast_wrap_req(context,
|
|
&ctx->fast_state,
|
|
&req2);
|
|
|
|
krb5_data_free(&checksum_data);
|
|
if (ret) {
|
|
free_AS_REQ(&req2);
|
|
goto out;
|
|
}
|
|
|
|
krb5_data_free(&ctx->req_buffer);
|
|
|
|
ASN1_MALLOC_ENCODE(AS_REQ,
|
|
ctx->req_buffer.data, ctx->req_buffer.length,
|
|
&req2, &len, ret);
|
|
free_AS_REQ(&req2);
|
|
if (ret)
|
|
goto out;
|
|
if(len != ctx->req_buffer.length)
|
|
krb5_abortx(context, "internal error in ASN.1 encoder");
|
|
|
|
ret = krb5_data_copy(out,
|
|
ctx->req_buffer.data,
|
|
ctx->req_buffer.length);
|
|
if (ret)
|
|
goto out;
|
|
|
|
*out_realm = strdup(ctx->cred.client->realm);
|
|
if (*out_realm == NULL) {
|
|
krb5_data_free(out);
|
|
ret = ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
*flags = KRB5_INIT_CREDS_STEP_FLAG_CONTINUE;
|
|
|
|
gettimeofday(&end_time, NULL);
|
|
timevalsub(&end_time, &start_time);
|
|
timevaladd(&ctx->stats.run_time, &end_time);
|
|
|
|
return 0;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* The core loop if krb5_get_init_creds() function family. Create the
|
|
* packets and have the caller send them off to the KDC.
|
|
*
|
|
* If the caller want all work been done for them, use
|
|
* krb5_init_creds_get() instead.
|
|
*
|
|
* @param context a Kerberos 5 context.
|
|
* @param ctx ctx krb5_init_creds_context context.
|
|
* @param in input data from KDC, first round it should be reset by krb5_data_zero().
|
|
* @param out reply to KDC. The caller needs to call krb5_data_free()
|
|
* @param out_realm the destination realm for 'out', free with krb5_xfree()
|
|
* @param flags status of the round, if
|
|
* KRB5_INIT_CREDS_STEP_FLAG_CONTINUE is set, continue one more round.
|
|
*
|
|
* @return 0 for success, or an Kerberos 5 error code, see
|
|
* krb5_get_error_message().
|
|
*
|
|
* @ingroup krb5_credential
|
|
*/
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_init_creds_step(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
const krb5_data *in,
|
|
krb5_data *out,
|
|
krb5_realm *out_realm,
|
|
unsigned int *flags)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_data empty;
|
|
|
|
krb5_data_zero(&empty);
|
|
krb5_data_zero(out);
|
|
*out_realm = NULL;
|
|
|
|
if ((ctx->fast_state.flags & KRB5_FAST_ANON_PKINIT_ARMOR) &&
|
|
ctx->fast_state.armor_ccache == NULL) {
|
|
ret = _krb5_fast_anon_pkinit_step(context, ctx, &ctx->fast_state,
|
|
in, out, out_realm, flags);
|
|
if (ret && (ctx->fast_state.flags & KRB5_FAST_OPTIMISTIC)) {
|
|
_krb5_debug(context, 5, "Preauth failed with optimistic "
|
|
"FAST, trying w/o FAST");
|
|
ctx->fast_state.flags &= ~KRB5_FAST_OPTIMISTIC;
|
|
ctx->fast_state.flags &= ~KRB5_FAST_REQUIRED;
|
|
ctx->fast_state.flags &= ~KRB5_FAST_ANON_PKINIT_ARMOR;
|
|
} else if (ret ||
|
|
(*flags & KRB5_INIT_CREDS_STEP_FLAG_CONTINUE))
|
|
return ret;
|
|
|
|
in = ∅
|
|
}
|
|
|
|
return init_creds_step(context, ctx, in, out, out_realm, flags);
|
|
}
|
|
|
|
/**
|
|
* Extract the newly acquired credentials from krb5_init_creds_context
|
|
* context.
|
|
*
|
|
* @param context A Kerberos 5 context.
|
|
* @param ctx
|
|
* @param cred credentials, free with krb5_free_cred_contents().
|
|
*
|
|
* @return 0 for sucess or An Kerberos error code, see krb5_get_error_message().
|
|
*/
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_init_creds_get_creds(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
krb5_creds *cred)
|
|
{
|
|
return krb5_copy_creds_contents(context, &ctx->cred, cred);
|
|
}
|
|
|
|
/**
|
|
* Extract the as-reply key from the context.
|
|
*
|
|
* Only allowed when the as-reply-key is not directly derived from the
|
|
* password like PK-INIT, GSS, FAST hardened key, etc.
|
|
*
|
|
* @param context A Kerberos 5 context.
|
|
* @param ctx ctx krb5_init_creds_context context.
|
|
* @param as_reply_key keyblock, free with krb5_free_keyblock_contents().
|
|
*
|
|
* @return 0 for sucess or An Kerberos error code, see krb5_get_error_message().
|
|
*/
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_init_creds_get_as_reply_key(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
krb5_keyblock *as_reply_key)
|
|
{
|
|
if (ctx->as_reply_key == NULL)
|
|
return KRB5KDC_ERR_PREAUTH_REQUIRED;
|
|
return krb5_copy_keyblock_contents(context, ctx->as_reply_key, as_reply_key);
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION krb5_timestamp KRB5_LIB_CALL
|
|
_krb5_init_creds_get_cred_starttime(krb5_context context, krb5_init_creds_context ctx)
|
|
{
|
|
return ctx->cred.times.starttime;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION krb5_timestamp KRB5_LIB_CALL
|
|
_krb5_init_creds_get_cred_endtime(krb5_context context, krb5_init_creds_context ctx)
|
|
{
|
|
return ctx->cred.times.endtime;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION krb5_principal KRB5_LIB_CALL
|
|
_krb5_init_creds_get_cred_client(krb5_context context, krb5_init_creds_context ctx)
|
|
{
|
|
return ctx->cred.client;
|
|
}
|
|
|
|
/**
|
|
* Get the last error from the transaction.
|
|
*
|
|
* @return Returns 0 or an error code
|
|
*
|
|
* @ingroup krb5_credential
|
|
*/
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_init_creds_get_error(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
KRB_ERROR *error)
|
|
{
|
|
krb5_error_code ret;
|
|
|
|
ret = copy_KRB_ERROR(&ctx->error, error);
|
|
if (ret)
|
|
krb5_enomem(context);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Store config
|
|
*
|
|
* @param context A Kerberos 5 context.
|
|
* @param ctx The krb5_init_creds_context to free.
|
|
* @param id store
|
|
*
|
|
* @return Returns 0 or an error code
|
|
*
|
|
* @ingroup krb5_credential
|
|
*/
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_init_creds_store_config(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
krb5_ccache id)
|
|
{
|
|
krb5_error_code ret;
|
|
|
|
if (ctx->kdc_hostname) {
|
|
krb5_data data;
|
|
data.length = strlen(ctx->kdc_hostname);
|
|
data.data = ctx->kdc_hostname;
|
|
|
|
ret = krb5_cc_set_config(context, id, NULL, "lkdc-hostname", &data);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
if (ctx->sitename) {
|
|
krb5_data data;
|
|
data.length = strlen(ctx->sitename);
|
|
data.data = ctx->sitename;
|
|
|
|
ret = krb5_cc_set_config(context, id, NULL, "sitename", &data);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @ingroup krb5_credential
|
|
*/
|
|
|
|
krb5_error_code
|
|
krb5_init_creds_store(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
krb5_ccache id)
|
|
{
|
|
krb5_error_code ret;
|
|
|
|
if (ctx->cred.client == NULL) {
|
|
ret = KRB5KDC_ERR_PREAUTH_REQUIRED;
|
|
krb5_set_error_message(context, ret, "init creds not completed yet");
|
|
return ret;
|
|
}
|
|
|
|
ret = krb5_cc_initialize(context, id, ctx->cred.client);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = krb5_cc_store_cred(context, id, &ctx->cred);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (ctx->cred.flags.b.enc_pa_rep) {
|
|
krb5_data data = { 3, rk_UNCONST("yes") };
|
|
ret = krb5_cc_set_config(context, id, ctx->cred.server,
|
|
"fast_avail", &data);
|
|
if (ret && ret != KRB5_CC_NOSUPP)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Free the krb5_init_creds_context allocated by krb5_init_creds_init().
|
|
*
|
|
* @param context A Kerberos 5 context.
|
|
* @param ctx The krb5_init_creds_context to free.
|
|
*
|
|
* @ingroup krb5_credential
|
|
*/
|
|
|
|
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
|
|
krb5_init_creds_free(krb5_context context,
|
|
krb5_init_creds_context ctx)
|
|
{
|
|
free_init_creds_ctx(context, ctx);
|
|
free(ctx);
|
|
}
|
|
|
|
/**
|
|
* Get new credentials as setup by the krb5_init_creds_context.
|
|
*
|
|
* @param context A Kerberos 5 context.
|
|
* @param ctx The krb5_init_creds_context to process.
|
|
*
|
|
* @ingroup krb5_credential
|
|
*/
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_init_creds_get(krb5_context context, krb5_init_creds_context ctx)
|
|
{
|
|
krb5_sendto_ctx stctx = NULL;
|
|
krb5_error_code ret;
|
|
krb5_data in, out;
|
|
unsigned int flags = 0;
|
|
|
|
krb5_data_zero(&in);
|
|
krb5_data_zero(&out);
|
|
|
|
ret = krb5_sendto_ctx_alloc(context, &stctx);
|
|
if (ret)
|
|
goto out;
|
|
krb5_sendto_ctx_set_func(stctx, _krb5_kdc_retry, NULL);
|
|
|
|
if (ctx->kdc_hostname)
|
|
krb5_sendto_set_hostname(context, stctx, ctx->kdc_hostname);
|
|
if (ctx->sitename)
|
|
krb5_sendto_set_sitename(context, stctx, ctx->sitename);
|
|
|
|
while (1) {
|
|
struct timeval nstart, nend;
|
|
krb5_realm realm = NULL;
|
|
|
|
flags = 0;
|
|
ret = krb5_init_creds_step(context, ctx, &in, &out, &realm, &flags);
|
|
krb5_data_free(&in);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if ((flags & KRB5_INIT_CREDS_STEP_FLAG_CONTINUE) == 0)
|
|
break;
|
|
|
|
gettimeofday(&nstart, NULL);
|
|
|
|
ret = krb5_sendto_context (context, stctx, &out, realm, &in);
|
|
krb5_data_free(&out);
|
|
free(realm);
|
|
if (ret)
|
|
goto out;
|
|
|
|
gettimeofday(&nend, NULL);
|
|
timevalsub(&nend, &nstart);
|
|
timevaladd(&ctx->stats.run_time, &nend);
|
|
}
|
|
|
|
out:
|
|
if (stctx)
|
|
krb5_sendto_ctx_free(context, stctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Get new credentials using password.
|
|
*
|
|
* @ingroup krb5_credential
|
|
*/
|
|
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_get_init_creds_password(krb5_context context,
|
|
krb5_creds *creds,
|
|
krb5_principal client,
|
|
const char *password,
|
|
krb5_prompter_fct prompter,
|
|
void *data,
|
|
krb5_deltat start_time,
|
|
const char *in_tkt_service,
|
|
krb5_get_init_creds_opt *options)
|
|
{
|
|
krb5_init_creds_context ctx;
|
|
char buf[BUFSIZ], buf2[BUFSIZ];
|
|
krb5_error_code ret;
|
|
int chpw = 0;
|
|
|
|
again:
|
|
ret = krb5_init_creds_init(context, client, prompter, data, start_time, options, &ctx);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = krb5_init_creds_set_service(context, ctx, in_tkt_service);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (prompter != NULL && ctx->password == NULL && password == NULL) {
|
|
krb5_prompt prompt;
|
|
krb5_data password_data;
|
|
char *p, *q = NULL;
|
|
int aret;
|
|
|
|
ret = krb5_unparse_name(context, client, &p);
|
|
if (ret)
|
|
goto out;
|
|
|
|
aret = asprintf(&q, "%s's Password: ", p);
|
|
free (p);
|
|
if (aret == -1 || q == NULL) {
|
|
ret = krb5_enomem(context);
|
|
goto out;
|
|
}
|
|
prompt.prompt = q;
|
|
password_data.data = buf;
|
|
password_data.length = sizeof(buf);
|
|
prompt.hidden = 1;
|
|
prompt.reply = &password_data;
|
|
prompt.type = KRB5_PROMPT_TYPE_PASSWORD;
|
|
|
|
ret = (*prompter) (context, data, NULL, NULL, 1, &prompt);
|
|
free (q);
|
|
if (ret) {
|
|
memset_s(buf, sizeof(buf), 0, sizeof(buf));
|
|
ret = KRB5_LIBOS_PWDINTR;
|
|
krb5_clear_error_message (context);
|
|
goto out;
|
|
}
|
|
password = password_data.data;
|
|
}
|
|
|
|
if (password) {
|
|
ret = krb5_init_creds_set_password(context, ctx, password);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
ret = krb5_init_creds_get(context, ctx);
|
|
|
|
if (ret == 0)
|
|
krb5_process_last_request(context, options, ctx);
|
|
|
|
|
|
if (ret == KRB5KDC_ERR_KEY_EXPIRED && chpw == 0) {
|
|
/* try to avoid recursion */
|
|
if (in_tkt_service != NULL && strcmp(in_tkt_service, "kadmin/changepw") == 0)
|
|
goto out;
|
|
|
|
/* don't try to change password if no prompter or prompting disabled */
|
|
if (!ctx->runflags.change_password_prompt)
|
|
goto out;
|
|
|
|
ret = change_password (context,
|
|
client,
|
|
ctx->password,
|
|
buf2,
|
|
sizeof(buf2),
|
|
prompter,
|
|
data,
|
|
options);
|
|
if (ret)
|
|
goto out;
|
|
password = buf2;
|
|
chpw = 1;
|
|
krb5_init_creds_free(context, ctx);
|
|
goto again;
|
|
}
|
|
|
|
out:
|
|
if (ret == 0)
|
|
krb5_init_creds_get_creds(context, ctx, creds);
|
|
|
|
if (ctx)
|
|
krb5_init_creds_free(context, ctx);
|
|
|
|
memset_s(buf, sizeof(buf), 0, sizeof(buf));
|
|
memset_s(buf2, sizeof(buf), 0, sizeof(buf2));
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Get new credentials using keyblock.
|
|
*
|
|
* @ingroup krb5_credential
|
|
*/
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_get_init_creds_keyblock(krb5_context context,
|
|
krb5_creds *creds,
|
|
krb5_principal client,
|
|
krb5_keyblock *keyblock,
|
|
krb5_deltat start_time,
|
|
const char *in_tkt_service,
|
|
krb5_get_init_creds_opt *options)
|
|
{
|
|
krb5_init_creds_context ctx;
|
|
krb5_error_code ret;
|
|
|
|
memset(creds, 0, sizeof(*creds));
|
|
|
|
ret = krb5_init_creds_init(context, client, NULL, NULL, start_time, options, &ctx);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = krb5_init_creds_set_service(context, ctx, in_tkt_service);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = krb5_init_creds_set_keyblock(context, ctx, keyblock);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = krb5_init_creds_get(context, ctx);
|
|
|
|
if (ret == 0)
|
|
krb5_process_last_request(context, options, ctx);
|
|
|
|
out:
|
|
if (ret == 0)
|
|
krb5_init_creds_get_creds(context, ctx, creds);
|
|
|
|
if (ctx)
|
|
krb5_init_creds_free(context, ctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Get new credentials using keytab.
|
|
*
|
|
* @ingroup krb5_credential
|
|
*/
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
krb5_get_init_creds_keytab(krb5_context context,
|
|
krb5_creds *creds,
|
|
krb5_principal client,
|
|
krb5_keytab keytab,
|
|
krb5_deltat start_time,
|
|
const char *in_tkt_service,
|
|
krb5_get_init_creds_opt *options)
|
|
{
|
|
krb5_init_creds_context ctx;
|
|
krb5_keytab_entry ktent;
|
|
krb5_error_code ret;
|
|
|
|
memset(&ktent, 0, sizeof(ktent));
|
|
memset(creds, 0, sizeof(*creds));
|
|
|
|
if (strcmp(client->realm, "") == 0) {
|
|
/*
|
|
* Referral realm. We have a keytab, so pick a realm by
|
|
* matching in the keytab.
|
|
*/
|
|
ret = krb5_kt_get_entry(context, keytab, client, 0, 0, &ktent);
|
|
if (ret == 0)
|
|
client = ktent.principal;
|
|
}
|
|
|
|
ret = krb5_init_creds_init(context, client, NULL, NULL, start_time, options, &ctx);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = krb5_init_creds_set_service(context, ctx, in_tkt_service);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = krb5_init_creds_set_keytab(context, ctx, keytab);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = krb5_init_creds_get(context, ctx);
|
|
if (ret == 0)
|
|
krb5_process_last_request(context, options, ctx);
|
|
|
|
out:
|
|
krb5_kt_free_entry(context, &ktent);
|
|
if (ret == 0)
|
|
krb5_init_creds_get_creds(context, ctx, creds);
|
|
|
|
if (ctx)
|
|
krb5_init_creds_free(context, ctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
|
|
_krb5_init_creds_set_gss_mechanism(krb5_context context,
|
|
krb5_gss_init_ctx gssic,
|
|
const struct gss_OID_desc_struct *gss_mech)
|
|
{
|
|
gssic->mech = gss_mech; /* OIDs are interned, so no copy required */
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION const struct gss_OID_desc_struct * KRB5_LIB_CALL
|
|
_krb5_init_creds_get_gss_mechanism(krb5_context context,
|
|
krb5_gss_init_ctx gssic)
|
|
{
|
|
return gssic->mech;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION void KRB5_LIB_CALL
|
|
_krb5_init_creds_set_gss_cred(krb5_context context,
|
|
krb5_gss_init_ctx gssic,
|
|
struct gss_cred_id_t_desc_struct *gss_cred)
|
|
{
|
|
if (gssic->cred != gss_cred && gssic->flags.release_cred)
|
|
gssic->release_cred(context, gssic, gssic->cred);
|
|
|
|
gssic->cred = gss_cred;
|
|
gssic->flags.release_cred = 1;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION const struct gss_cred_id_t_desc_struct * KRB5_LIB_CALL
|
|
_krb5_init_creds_get_gss_cred(krb5_context context,
|
|
krb5_gss_init_ctx gssic)
|
|
{
|
|
return gssic->cred;
|
|
}
|
|
|
|
KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
|
|
_krb5_init_creds_init_gss(krb5_context context,
|
|
krb5_init_creds_context ctx,
|
|
krb5_gssic_step step,
|
|
krb5_gssic_finish finish,
|
|
krb5_gssic_release_cred release_cred,
|
|
krb5_gssic_delete_sec_context delete_sec_context,
|
|
const struct gss_cred_id_t_desc_struct *gss_cred,
|
|
const struct gss_OID_desc_struct *gss_mech,
|
|
unsigned int flags)
|
|
{
|
|
krb5_gss_init_ctx gssic;
|
|
|
|
gssic = calloc(1, sizeof(*gssic));
|
|
if (gssic == NULL)
|
|
return krb5_enomem(context);
|
|
|
|
if (ctx->gss_init_ctx)
|
|
free_gss_init_ctx(context, ctx->gss_init_ctx);
|
|
ctx->gss_init_ctx = gssic;
|
|
|
|
gssic->cred = (struct gss_cred_id_t_desc_struct *)gss_cred;
|
|
gssic->mech = gss_mech;
|
|
if (flags & KRB5_GSS_IC_FLAG_RELEASE_CRED)
|
|
gssic->flags.release_cred = 1;
|
|
|
|
gssic->step = step;
|
|
gssic->finish = finish;
|
|
gssic->release_cred = release_cred;
|
|
gssic->delete_sec_context = delete_sec_context;
|
|
|
|
return 0;
|
|
}
|