942a821fab
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@25171 ec53bebd-3082-4978-b11e-865c3cabbd6b
566 lines
14 KiB
C
566 lines
14 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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* 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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#define KRB5_DEPRECATED
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#include "krb5_locl.h"
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#ifndef HEIMDAL_SMALLER
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static krb5_error_code
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make_pa_enc_timestamp(krb5_context context, PA_DATA *pa,
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krb5_enctype etype, krb5_keyblock *key)
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{
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PA_ENC_TS_ENC p;
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unsigned char *buf;
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size_t buf_size;
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size_t len;
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EncryptedData encdata;
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krb5_error_code ret;
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int32_t usec;
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int usec2;
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krb5_crypto crypto;
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krb5_us_timeofday (context, &p.patimestamp, &usec);
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usec2 = usec;
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p.pausec = &usec2;
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ASN1_MALLOC_ENCODE(PA_ENC_TS_ENC, buf, buf_size, &p, &len, ret);
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if (ret)
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return ret;
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if(buf_size != len)
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krb5_abortx(context, "internal error in ASN.1 encoder");
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ret = krb5_crypto_init(context, key, 0, &crypto);
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if (ret) {
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free(buf);
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return ret;
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}
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ret = krb5_encrypt_EncryptedData(context,
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crypto,
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KRB5_KU_PA_ENC_TIMESTAMP,
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buf,
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len,
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0,
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&encdata);
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free(buf);
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krb5_crypto_destroy(context, crypto);
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if (ret)
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return ret;
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ASN1_MALLOC_ENCODE(EncryptedData, buf, buf_size, &encdata, &len, ret);
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free_EncryptedData(&encdata);
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if (ret)
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return ret;
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if(buf_size != len)
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krb5_abortx(context, "internal error in ASN.1 encoder");
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pa->padata_type = KRB5_PADATA_ENC_TIMESTAMP;
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pa->padata_value.length = len;
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pa->padata_value.data = buf;
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return 0;
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}
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static krb5_error_code
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add_padata(krb5_context context,
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METHOD_DATA *md,
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krb5_principal client,
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krb5_key_proc key_proc,
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krb5_const_pointer keyseed,
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krb5_enctype *enctypes,
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unsigned netypes,
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krb5_salt *salt)
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{
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krb5_error_code ret;
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PA_DATA *pa2;
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krb5_salt salt2;
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krb5_enctype *ep;
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int i;
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if(salt == NULL) {
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/* default to standard salt */
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ret = krb5_get_pw_salt (context, client, &salt2);
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if (ret)
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return ret;
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salt = &salt2;
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}
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if (!enctypes) {
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enctypes = context->etypes;
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netypes = 0;
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for (ep = enctypes; *ep != ETYPE_NULL; ep++)
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netypes++;
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}
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pa2 = realloc (md->val, (md->len + netypes) * sizeof(*md->val));
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if (pa2 == NULL) {
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krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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md->val = pa2;
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for (i = 0; i < netypes; ++i) {
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krb5_keyblock *key;
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ret = (*key_proc)(context, enctypes[i], *salt, keyseed, &key);
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if (ret)
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continue;
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ret = make_pa_enc_timestamp (context, &md->val[md->len],
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enctypes[i], key);
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krb5_free_keyblock (context, key);
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if (ret)
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return ret;
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++md->len;
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}
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if(salt == &salt2)
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krb5_free_salt(context, salt2);
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return 0;
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}
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static krb5_error_code
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init_as_req (krb5_context context,
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KDCOptions opts,
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krb5_creds *creds,
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const krb5_addresses *addrs,
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const krb5_enctype *etypes,
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const krb5_preauthtype *ptypes,
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const krb5_preauthdata *preauth,
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krb5_key_proc key_proc,
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krb5_const_pointer keyseed,
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unsigned nonce,
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AS_REQ *a)
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{
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krb5_error_code ret;
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krb5_salt salt;
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memset(a, 0, sizeof(*a));
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a->pvno = 5;
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a->msg_type = krb_as_req;
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a->req_body.kdc_options = opts;
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a->req_body.cname = malloc(sizeof(*a->req_body.cname));
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if (a->req_body.cname == NULL) {
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ret = ENOMEM;
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krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
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goto fail;
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}
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a->req_body.sname = malloc(sizeof(*a->req_body.sname));
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if (a->req_body.sname == NULL) {
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ret = ENOMEM;
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krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
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goto fail;
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}
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ret = _krb5_principal2principalname (a->req_body.cname, creds->client);
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if (ret)
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goto fail;
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ret = _krb5_principal2principalname (a->req_body.sname, creds->server);
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if (ret)
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goto fail;
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ret = copy_Realm(&creds->client->realm, &a->req_body.realm);
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if (ret)
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goto fail;
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if(creds->times.starttime) {
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a->req_body.from = malloc(sizeof(*a->req_body.from));
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if (a->req_body.from == NULL) {
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ret = ENOMEM;
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krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
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goto fail;
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}
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*a->req_body.from = creds->times.starttime;
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}
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if(creds->times.endtime){
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ALLOC(a->req_body.till, 1);
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*a->req_body.till = creds->times.endtime;
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}
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if(creds->times.renew_till){
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a->req_body.rtime = malloc(sizeof(*a->req_body.rtime));
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if (a->req_body.rtime == NULL) {
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ret = ENOMEM;
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krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
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goto fail;
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}
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*a->req_body.rtime = creds->times.renew_till;
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}
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a->req_body.nonce = nonce;
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ret = krb5_init_etype (context,
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&a->req_body.etype.len,
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&a->req_body.etype.val,
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etypes);
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if (ret)
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goto fail;
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/*
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* This means no addresses
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*/
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if (addrs && addrs->len == 0) {
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a->req_body.addresses = NULL;
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} else {
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a->req_body.addresses = malloc(sizeof(*a->req_body.addresses));
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if (a->req_body.addresses == NULL) {
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ret = ENOMEM;
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krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
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goto fail;
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}
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if (addrs)
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ret = krb5_copy_addresses(context, addrs, a->req_body.addresses);
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else {
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ret = krb5_get_all_client_addrs (context, a->req_body.addresses);
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if(ret == 0 && a->req_body.addresses->len == 0) {
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free(a->req_body.addresses);
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a->req_body.addresses = NULL;
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}
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}
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if (ret)
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return ret;
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}
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a->req_body.enc_authorization_data = NULL;
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a->req_body.additional_tickets = NULL;
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if(preauth != NULL) {
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int i;
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ALLOC(a->padata, 1);
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if(a->padata == NULL) {
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ret = ENOMEM;
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krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
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goto fail;
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}
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a->padata->val = NULL;
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a->padata->len = 0;
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for(i = 0; i < preauth->len; i++) {
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if(preauth->val[i].type == KRB5_PADATA_ENC_TIMESTAMP){
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int j;
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for(j = 0; j < preauth->val[i].info.len; j++) {
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krb5_salt *sp = &salt;
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if(preauth->val[i].info.val[j].salttype)
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salt.salttype = *preauth->val[i].info.val[j].salttype;
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else
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salt.salttype = KRB5_PW_SALT;
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if(preauth->val[i].info.val[j].salt)
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salt.saltvalue = *preauth->val[i].info.val[j].salt;
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else
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if(salt.salttype == KRB5_PW_SALT)
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sp = NULL;
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else
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krb5_data_zero(&salt.saltvalue);
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ret = add_padata(context, a->padata, creds->client,
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key_proc, keyseed,
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&preauth->val[i].info.val[j].etype, 1,
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sp);
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if (ret == 0)
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break;
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}
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}
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}
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} else
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/* not sure this is the way to use `ptypes' */
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if (ptypes == NULL || *ptypes == KRB5_PADATA_NONE)
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a->padata = NULL;
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else if (*ptypes == KRB5_PADATA_ENC_TIMESTAMP) {
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ALLOC(a->padata, 1);
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if (a->padata == NULL) {
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ret = ENOMEM;
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krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
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goto fail;
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}
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a->padata->len = 0;
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a->padata->val = NULL;
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/* make a v5 salted pa-data */
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add_padata(context, a->padata, creds->client,
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key_proc, keyseed, a->req_body.etype.val,
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a->req_body.etype.len, NULL);
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/* make a v4 salted pa-data */
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salt.salttype = KRB5_PW_SALT;
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krb5_data_zero(&salt.saltvalue);
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add_padata(context, a->padata, creds->client,
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key_proc, keyseed, a->req_body.etype.val,
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a->req_body.etype.len, &salt);
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} else {
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ret = KRB5_PREAUTH_BAD_TYPE;
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krb5_set_error_message (context, ret,
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N_("pre-auth type %d not supported", ""),
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*ptypes);
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goto fail;
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}
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return 0;
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fail:
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free_AS_REQ(a);
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return ret;
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}
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static int
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set_ptypes(krb5_context context,
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KRB_ERROR *error,
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const krb5_preauthtype **ptypes,
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krb5_preauthdata **preauth)
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{
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static krb5_preauthdata preauth2;
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static krb5_preauthtype ptypes2[] = { KRB5_PADATA_ENC_TIMESTAMP, KRB5_PADATA_NONE };
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if(error->e_data) {
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METHOD_DATA md;
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int i;
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decode_METHOD_DATA(error->e_data->data,
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error->e_data->length,
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&md,
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NULL);
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for(i = 0; i < md.len; i++){
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switch(md.val[i].padata_type){
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case KRB5_PADATA_ENC_TIMESTAMP:
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*ptypes = ptypes2;
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break;
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case KRB5_PADATA_ETYPE_INFO:
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*preauth = &preauth2;
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ALLOC_SEQ(*preauth, 1);
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(*preauth)->val[0].type = KRB5_PADATA_ENC_TIMESTAMP;
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decode_ETYPE_INFO(md.val[i].padata_value.data,
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md.val[i].padata_value.length,
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&(*preauth)->val[0].info,
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NULL);
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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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free_METHOD_DATA(&md);
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} else {
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*ptypes = ptypes2;
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}
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return(1);
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}
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|
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krb5_error_code KRB5_LIB_FUNCTION
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krb5_get_in_cred(krb5_context context,
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krb5_flags options,
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const krb5_addresses *addrs,
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const krb5_enctype *etypes,
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const krb5_preauthtype *ptypes,
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const krb5_preauthdata *preauth,
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krb5_key_proc key_proc,
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krb5_const_pointer keyseed,
|
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krb5_decrypt_proc decrypt_proc,
|
|
krb5_const_pointer decryptarg,
|
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krb5_creds *creds,
|
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krb5_kdc_rep *ret_as_reply)
|
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KRB5_DEPRECATED
|
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{
|
|
krb5_error_code ret;
|
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AS_REQ a;
|
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krb5_kdc_rep rep;
|
|
krb5_data req, resp;
|
|
size_t len;
|
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krb5_salt salt;
|
|
krb5_keyblock *key;
|
|
size_t size;
|
|
KDCOptions opts;
|
|
PA_DATA *pa;
|
|
krb5_enctype etype;
|
|
krb5_preauthdata *my_preauth = NULL;
|
|
unsigned nonce;
|
|
int done;
|
|
|
|
opts = int2KDCOptions(options);
|
|
|
|
krb5_generate_random_block (&nonce, sizeof(nonce));
|
|
nonce &= 0xffffffff;
|
|
|
|
do {
|
|
done = 1;
|
|
ret = init_as_req (context,
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|
opts,
|
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creds,
|
|
addrs,
|
|
etypes,
|
|
ptypes,
|
|
preauth,
|
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key_proc,
|
|
keyseed,
|
|
nonce,
|
|
&a);
|
|
if (my_preauth) {
|
|
free_ETYPE_INFO(&my_preauth->val[0].info);
|
|
free (my_preauth->val);
|
|
my_preauth = NULL;
|
|
}
|
|
if (ret)
|
|
return ret;
|
|
|
|
ASN1_MALLOC_ENCODE(AS_REQ, req.data, req.length, &a, &len, ret);
|
|
free_AS_REQ(&a);
|
|
if (ret)
|
|
return ret;
|
|
if(len != req.length)
|
|
krb5_abortx(context, "internal error in ASN.1 encoder");
|
|
|
|
ret = krb5_sendto_kdc (context, &req, &creds->client->realm, &resp);
|
|
krb5_data_free(&req);
|
|
if (ret)
|
|
return ret;
|
|
|
|
memset (&rep, 0, sizeof(rep));
|
|
ret = decode_AS_REP(resp.data, resp.length, &rep.kdc_rep, &size);
|
|
if(ret) {
|
|
/* let's try to parse it as a KRB-ERROR */
|
|
KRB_ERROR error;
|
|
int ret2;
|
|
|
|
ret2 = krb5_rd_error(context, &resp, &error);
|
|
if(ret2 && resp.data && ((char*)resp.data)[0] == 4)
|
|
ret = KRB5KRB_AP_ERR_V4_REPLY;
|
|
krb5_data_free(&resp);
|
|
if (ret2 == 0) {
|
|
ret = krb5_error_from_rd_error(context, &error, creds);
|
|
/* if no preauth was set and KDC requires it, give it
|
|
one more try */
|
|
if (!ptypes && !preauth
|
|
&& ret == KRB5KDC_ERR_PREAUTH_REQUIRED
|
|
#if 0
|
|
|| ret == KRB5KDC_ERR_BADOPTION
|
|
#endif
|
|
&& set_ptypes(context, &error, &ptypes, &my_preauth)) {
|
|
done = 0;
|
|
preauth = my_preauth;
|
|
krb5_free_error_contents(context, &error);
|
|
krb5_clear_error_message(context);
|
|
continue;
|
|
}
|
|
if(ret_as_reply)
|
|
ret_as_reply->error = error;
|
|
else
|
|
free_KRB_ERROR (&error);
|
|
return ret;
|
|
}
|
|
return ret;
|
|
}
|
|
krb5_data_free(&resp);
|
|
} while(!done);
|
|
|
|
pa = NULL;
|
|
etype = rep.kdc_rep.enc_part.etype;
|
|
if(rep.kdc_rep.padata){
|
|
int i = 0;
|
|
pa = krb5_find_padata(rep.kdc_rep.padata->val, rep.kdc_rep.padata->len,
|
|
KRB5_PADATA_PW_SALT, &i);
|
|
if(pa == NULL) {
|
|
i = 0;
|
|
pa = krb5_find_padata(rep.kdc_rep.padata->val,
|
|
rep.kdc_rep.padata->len,
|
|
KRB5_PADATA_AFS3_SALT, &i);
|
|
}
|
|
}
|
|
if(pa) {
|
|
salt.salttype = pa->padata_type;
|
|
salt.saltvalue = pa->padata_value;
|
|
|
|
ret = (*key_proc)(context, etype, salt, keyseed, &key);
|
|
} else {
|
|
/* make a v5 salted pa-data */
|
|
ret = krb5_get_pw_salt (context, creds->client, &salt);
|
|
|
|
if (ret)
|
|
goto out;
|
|
ret = (*key_proc)(context, etype, salt, keyseed, &key);
|
|
krb5_free_salt(context, salt);
|
|
}
|
|
if (ret)
|
|
goto out;
|
|
|
|
{
|
|
unsigned flags = 0;
|
|
if (opts.request_anonymous)
|
|
flags |= EXTRACT_TICKET_ALLOW_SERVER_MISMATCH;
|
|
|
|
ret = _krb5_extract_ticket(context,
|
|
&rep,
|
|
creds,
|
|
key,
|
|
keyseed,
|
|
KRB5_KU_AS_REP_ENC_PART,
|
|
NULL,
|
|
nonce,
|
|
flags,
|
|
decrypt_proc,
|
|
decryptarg);
|
|
}
|
|
memset (key->keyvalue.data, 0, key->keyvalue.length);
|
|
krb5_free_keyblock_contents (context, key);
|
|
free (key);
|
|
|
|
out:
|
|
if (ret == 0 && ret_as_reply)
|
|
*ret_as_reply = rep;
|
|
else
|
|
krb5_free_kdc_rep (context, &rep);
|
|
return ret;
|
|
}
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_get_in_tkt(krb5_context context,
|
|
krb5_flags options,
|
|
const krb5_addresses *addrs,
|
|
const krb5_enctype *etypes,
|
|
const krb5_preauthtype *ptypes,
|
|
krb5_key_proc key_proc,
|
|
krb5_const_pointer keyseed,
|
|
krb5_decrypt_proc decrypt_proc,
|
|
krb5_const_pointer decryptarg,
|
|
krb5_creds *creds,
|
|
krb5_ccache ccache,
|
|
krb5_kdc_rep *ret_as_reply)
|
|
KRB5_DEPRECATED
|
|
{
|
|
krb5_error_code ret;
|
|
|
|
ret = krb5_get_in_cred (context,
|
|
options,
|
|
addrs,
|
|
etypes,
|
|
ptypes,
|
|
NULL,
|
|
key_proc,
|
|
keyseed,
|
|
decrypt_proc,
|
|
decryptarg,
|
|
creds,
|
|
ret_as_reply);
|
|
if(ret)
|
|
return ret;
|
|
if (ccache)
|
|
ret = krb5_cc_store_cred (context, ccache, creds);
|
|
return ret;
|
|
}
|
|
|
|
#endif /* HEIMDAL_SMALLER */
|