cc47c8fa7b
We turn on a few extra warnings and fix the fallout that occurs when building with --enable-developer. Note that we get different warnings on different machines and so this will be a work in progress. So far, we have built on NetBSD/amd64 5.99.64 (which uses gcc 4.5.3) and Ubuntu 10.04.3 LTS (which uses gcc 4.4.3). Notably, we fixed 1. a lot of missing structure initialisers, 2. unchecked return values for functions that glibc marks as __attribute__((warn-unused-result)), 3. made minor modifications to slc and asn1_compile which can generate code which generates warnings, and 4. a few stragglers here and there. We turned off the extended warnings for many programs in appl/ as they are nearing the end of their useful lifetime, e.g. rsh, rcp, popper, ftp and telnet. Interestingly, glibc's strncmp() macro needed to be worked around whereas the function calls did not. We have not yet tried this on 32 bit platforms, so there will be a few more warnings when we do.
503 lines
12 KiB
C
503 lines
12 KiB
C
/*
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* Copyright (c) 2006 - 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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#include "ntlm.h"
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static int
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from_file(const char *fn, const char *target_domain,
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char **username, struct ntlm_buf *key)
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{
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char *str, buf[1024];
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FILE *f;
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f = fopen(fn, "r");
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if (f == NULL)
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return ENOENT;
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rk_cloexec_file(f);
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while (fgets(buf, sizeof(buf), f) != NULL) {
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char *d, *u, *p;
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buf[strcspn(buf, "\r\n")] = '\0';
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if (buf[0] == '#')
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continue;
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str = NULL;
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d = strtok_r(buf, ":", &str);
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if (d && strcasecmp(target_domain, d) != 0)
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continue;
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u = strtok_r(NULL, ":", &str);
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p = strtok_r(NULL, ":", &str);
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if (u == NULL || p == NULL)
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continue;
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*username = strdup(u);
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heim_ntlm_nt_key(p, key);
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memset(buf, 0, sizeof(buf));
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fclose(f);
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return 0;
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}
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memset(buf, 0, sizeof(buf));
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fclose(f);
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return ENOENT;
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}
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static int
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get_user_file(const ntlm_name target_name,
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char **username, struct ntlm_buf *key)
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{
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const char *fn;
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if (issuid())
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return ENOENT;
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fn = getenv("NTLM_USER_FILE");
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if (fn == NULL)
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return ENOENT;
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if (from_file(fn, target_name->domain, username, key) == 0)
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return 0;
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return ENOENT;
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}
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/*
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* Pick up the ntlm cred from the default krb5 credential cache.
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*/
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static int
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get_user_ccache(const ntlm_name name, char **username, struct ntlm_buf *key)
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{
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krb5_context context = NULL;
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krb5_principal client;
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krb5_ccache id = NULL;
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krb5_error_code ret;
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char *confname;
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krb5_data data;
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int aret;
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*username = NULL;
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krb5_data_zero(&data);
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key->length = 0;
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key->data = NULL;
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ret = krb5_init_context(&context);
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if (ret)
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return ret;
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ret = krb5_cc_default(context, &id);
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if (ret)
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goto out;
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ret = krb5_cc_get_principal(context, id, &client);
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if (ret)
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goto out;
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ret = krb5_unparse_name_flags(context, client,
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KRB5_PRINCIPAL_UNPARSE_NO_REALM,
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username);
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krb5_free_principal(context, client);
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if (ret)
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goto out;
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aret = asprintf(&confname, "ntlm-key-%s", name->domain);
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if (aret == -1) {
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krb5_clear_error_message(context);
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ret = ENOMEM;
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goto out;
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}
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ret = krb5_cc_get_config(context, id, NULL,
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confname, &data);
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if (ret)
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goto out;
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key->data = malloc(data.length);
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if (key->data == NULL) {
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ret = ENOMEM;
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goto out;
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}
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key->length = data.length;
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memcpy(key->data, data.data, data.length);
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out:
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krb5_data_free(&data);
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if (id)
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krb5_cc_close(context, id);
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krb5_free_context(context);
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return ret;
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}
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int
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_gss_ntlm_get_user_cred(const ntlm_name target_name,
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ntlm_cred *rcred)
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{
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ntlm_cred cred;
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int ret;
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cred = calloc(1, sizeof(*cred));
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if (cred == NULL)
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return ENOMEM;
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ret = get_user_file(target_name, &cred->username, &cred->key);
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if (ret)
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ret = get_user_ccache(target_name, &cred->username, &cred->key);
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if (ret) {
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free(cred);
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return ret;
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}
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cred->domain = strdup(target_name->domain);
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*rcred = cred;
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return ret;
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}
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static int
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_gss_copy_cred(ntlm_cred from, ntlm_cred *to)
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{
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*to = calloc(1, sizeof(**to));
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if (*to == NULL)
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return ENOMEM;
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(*to)->username = strdup(from->username);
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if ((*to)->username == NULL) {
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free(*to);
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return ENOMEM;
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}
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(*to)->domain = strdup(from->domain);
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if ((*to)->domain == NULL) {
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free((*to)->username);
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free(*to);
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return ENOMEM;
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}
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(*to)->key.data = malloc(from->key.length);
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if ((*to)->key.data == NULL) {
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free((*to)->domain);
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free((*to)->username);
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free(*to);
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return ENOMEM;
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}
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memcpy((*to)->key.data, from->key.data, from->key.length);
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(*to)->key.length = from->key.length;
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return 0;
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}
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OM_uint32 GSSAPI_CALLCONV
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_gss_ntlm_init_sec_context
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(OM_uint32 * minor_status,
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const gss_cred_id_t initiator_cred_handle,
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gss_ctx_id_t * context_handle,
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const gss_name_t target_name,
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const gss_OID mech_type,
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OM_uint32 req_flags,
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OM_uint32 time_req,
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const gss_channel_bindings_t input_chan_bindings,
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const gss_buffer_t input_token,
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gss_OID * actual_mech_type,
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gss_buffer_t output_token,
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OM_uint32 * ret_flags,
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OM_uint32 * time_rec
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)
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{
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ntlm_ctx ctx;
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ntlm_name name = (ntlm_name)target_name;
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*minor_status = 0;
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if (ret_flags)
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*ret_flags = 0;
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if (time_rec)
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*time_rec = 0;
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if (actual_mech_type)
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*actual_mech_type = GSS_C_NO_OID;
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if (*context_handle == GSS_C_NO_CONTEXT) {
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struct ntlm_type1 type1;
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struct ntlm_buf data;
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uint32_t flags = 0;
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int ret;
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ctx = calloc(1, sizeof(*ctx));
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if (ctx == NULL) {
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*minor_status = EINVAL;
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return GSS_S_FAILURE;
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}
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*context_handle = (gss_ctx_id_t)ctx;
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if (initiator_cred_handle != GSS_C_NO_CREDENTIAL) {
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ntlm_cred cred = (ntlm_cred)initiator_cred_handle;
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ret = _gss_copy_cred(cred, &ctx->client);
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} else
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ret = _gss_ntlm_get_user_cred(name, &ctx->client);
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if (ret) {
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_gss_ntlm_delete_sec_context(minor_status, context_handle, NULL);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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if (req_flags & GSS_C_CONF_FLAG)
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flags |= NTLM_NEG_SEAL;
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if (req_flags & GSS_C_INTEG_FLAG)
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flags |= NTLM_NEG_SIGN;
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else
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flags |= NTLM_NEG_ALWAYS_SIGN;
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flags |= NTLM_NEG_UNICODE;
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flags |= NTLM_NEG_NTLM;
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flags |= NTLM_NEG_NTLM2_SESSION;
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flags |= NTLM_NEG_KEYEX;
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memset(&type1, 0, sizeof(type1));
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type1.flags = flags;
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type1.domain = name->domain;
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type1.hostname = NULL;
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type1.os[0] = 0;
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type1.os[1] = 0;
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ret = heim_ntlm_encode_type1(&type1, &data);
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if (ret) {
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_gss_ntlm_delete_sec_context(minor_status, context_handle, NULL);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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output_token->value = data.data;
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output_token->length = data.length;
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return GSS_S_CONTINUE_NEEDED;
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} else {
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krb5_error_code ret;
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struct ntlm_type2 type2;
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struct ntlm_type3 type3;
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struct ntlm_buf data;
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ctx = (ntlm_ctx)*context_handle;
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data.data = input_token->value;
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data.length = input_token->length;
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ret = heim_ntlm_decode_type2(&data, &type2);
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if (ret) {
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_gss_ntlm_delete_sec_context(minor_status, context_handle, NULL);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ctx->flags = type2.flags;
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/* XXX check that type2.targetinfo matches `target_name´ */
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/* XXX check verify targetinfo buffer */
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memset(&type3, 0, sizeof(type3));
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type3.username = ctx->client->username;
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type3.flags = type2.flags;
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type3.targetname = type2.targetname;
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type3.ws = rk_UNCONST("workstation");
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/*
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* NTLM Version 1 if no targetinfo buffer.
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*/
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if (1 || type2.targetinfo.length == 0) {
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struct ntlm_buf sessionkey;
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if (type2.flags & NTLM_NEG_NTLM2_SESSION) {
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unsigned char nonce[8];
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if (RAND_bytes(nonce, sizeof(nonce)) != 1) {
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_gss_ntlm_delete_sec_context(minor_status,
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context_handle, NULL);
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*minor_status = EINVAL;
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return GSS_S_FAILURE;
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}
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ret = heim_ntlm_calculate_ntlm2_sess(nonce,
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type2.challenge,
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ctx->client->key.data,
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&type3.lm,
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&type3.ntlm);
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} else {
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ret = heim_ntlm_calculate_ntlm1(ctx->client->key.data,
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ctx->client->key.length,
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type2.challenge,
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&type3.ntlm);
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}
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if (ret) {
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_gss_ntlm_delete_sec_context(minor_status,context_handle,NULL);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ret = heim_ntlm_build_ntlm1_master(ctx->client->key.data,
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ctx->client->key.length,
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&sessionkey,
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&type3.sessionkey);
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if (ret) {
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if (type3.lm.data)
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free(type3.lm.data);
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if (type3.ntlm.data)
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free(type3.ntlm.data);
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_gss_ntlm_delete_sec_context(minor_status,context_handle,NULL);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ret = krb5_data_copy(&ctx->sessionkey,
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sessionkey.data, sessionkey.length);
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free(sessionkey.data);
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if (ret) {
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if (type3.lm.data)
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free(type3.lm.data);
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if (type3.ntlm.data)
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free(type3.ntlm.data);
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_gss_ntlm_delete_sec_context(minor_status,context_handle,NULL);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ctx->status |= STATUS_SESSIONKEY;
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} else {
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struct ntlm_buf sessionkey;
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unsigned char ntlmv2[16];
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struct ntlm_targetinfo ti;
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/* verify infotarget */
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ret = heim_ntlm_decode_targetinfo(&type2.targetinfo, 1, &ti);
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if(ret) {
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_gss_ntlm_delete_sec_context(minor_status,
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context_handle, NULL);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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if (ti.domainname && strcmp(ti.domainname, name->domain) != 0) {
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_gss_ntlm_delete_sec_context(minor_status,
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context_handle, NULL);
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*minor_status = EINVAL;
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return GSS_S_FAILURE;
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}
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ret = heim_ntlm_calculate_ntlm2(ctx->client->key.data,
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ctx->client->key.length,
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ctx->client->username,
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name->domain,
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type2.challenge,
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&type2.targetinfo,
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ntlmv2,
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&type3.ntlm);
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if (ret) {
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_gss_ntlm_delete_sec_context(minor_status,
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context_handle, NULL);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ret = heim_ntlm_build_ntlm1_master(ntlmv2, sizeof(ntlmv2),
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&sessionkey,
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&type3.sessionkey);
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memset(ntlmv2, 0, sizeof(ntlmv2));
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if (ret) {
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_gss_ntlm_delete_sec_context(minor_status,
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context_handle, NULL);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ctx->flags |= NTLM_NEG_NTLM2_SESSION;
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ret = krb5_data_copy(&ctx->sessionkey,
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sessionkey.data, sessionkey.length);
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free(sessionkey.data);
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if (ret) {
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_gss_ntlm_delete_sec_context(minor_status,
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context_handle, NULL);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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}
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if (ctx->flags & NTLM_NEG_NTLM2_SESSION) {
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ctx->status |= STATUS_SESSIONKEY;
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_gss_ntlm_set_key(&ctx->u.v2.send, 0, (ctx->flags & NTLM_NEG_KEYEX),
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ctx->sessionkey.data,
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ctx->sessionkey.length);
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_gss_ntlm_set_key(&ctx->u.v2.recv, 1, (ctx->flags & NTLM_NEG_KEYEX),
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ctx->sessionkey.data,
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ctx->sessionkey.length);
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} else {
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ctx->status |= STATUS_SESSIONKEY;
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RC4_set_key(&ctx->u.v1.crypto_recv.key,
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ctx->sessionkey.length,
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ctx->sessionkey.data);
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RC4_set_key(&ctx->u.v1.crypto_send.key,
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ctx->sessionkey.length,
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ctx->sessionkey.data);
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}
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ret = heim_ntlm_encode_type3(&type3, &data);
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free(type3.sessionkey.data);
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if (type3.lm.data)
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free(type3.lm.data);
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if (type3.ntlm.data)
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free(type3.ntlm.data);
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if (ret) {
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_gss_ntlm_delete_sec_context(minor_status, context_handle, NULL);
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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output_token->length = data.length;
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output_token->value = data.data;
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if (actual_mech_type)
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*actual_mech_type = GSS_NTLM_MECHANISM;
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if (ret_flags)
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*ret_flags = 0;
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if (time_rec)
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*time_rec = GSS_C_INDEFINITE;
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ctx->status |= STATUS_OPEN;
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return GSS_S_COMPLETE;
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}
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}
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