summaryrefslogtreecommitdiff
path: root/source4/heimdal/lib/gssapi/get_mic.c
diff options
context:
space:
mode:
authorHeimdal Import User <samba-bugs@samba.org>2005-07-11 01:16:55 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 13:19:33 -0500
commit954c01728e0c7485b72c9a5d5737e5f6bd0cf0b9 (patch)
treefc11a048c8a582e2ca66415ff04dacf74f9abf22 /source4/heimdal/lib/gssapi/get_mic.c
parent7ead5ab06cea9f33e954a4579163262f97ea06ff (diff)
downloadsamba-954c01728e0c7485b72c9a5d5737e5f6bd0cf0b9.tar.gz
samba-954c01728e0c7485b72c9a5d5737e5f6bd0cf0b9.tar.bz2
samba-954c01728e0c7485b72c9a5d5737e5f6bd0cf0b9.zip
r8302: import mini HEIMDAL into the tree
(This used to be commit 118be28a7aef233799956615a99d1a2a74dac175)
Diffstat (limited to 'source4/heimdal/lib/gssapi/get_mic.c')
-rw-r--r--source4/heimdal/lib/gssapi/get_mic.c302
1 files changed, 302 insertions, 0 deletions
diff --git a/source4/heimdal/lib/gssapi/get_mic.c b/source4/heimdal/lib/gssapi/get_mic.c
new file mode 100644
index 0000000000..1c950e95d9
--- /dev/null
+++ b/source4/heimdal/lib/gssapi/get_mic.c
@@ -0,0 +1,302 @@
+/*
+ * Copyright (c) 1997 - 2003 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "gssapi_locl.h"
+
+RCSID("$Id: get_mic.c,v 1.29 2005/01/05 02:52:12 lukeh Exp $");
+
+static OM_uint32
+mic_des
+ (OM_uint32 * minor_status,
+ const gss_ctx_id_t context_handle,
+ gss_qop_t qop_req,
+ const gss_buffer_t message_buffer,
+ gss_buffer_t message_token,
+ krb5_keyblock *key
+ )
+{
+ u_char *p;
+ MD5_CTX md5;
+ u_char hash[16];
+ DES_key_schedule schedule;
+ DES_cblock deskey;
+ DES_cblock zero;
+ int32_t seq_number;
+ size_t len, total_len;
+
+ gssapi_krb5_encap_length (22, &len, &total_len, GSS_KRB5_MECHANISM);
+
+ message_token->length = total_len;
+ message_token->value = malloc (total_len);
+ if (message_token->value == NULL) {
+ *minor_status = ENOMEM;
+ return GSS_S_FAILURE;
+ }
+
+ p = gssapi_krb5_make_header(message_token->value,
+ len,
+ "\x01\x01", /* TOK_ID */
+ GSS_KRB5_MECHANISM);
+
+ memcpy (p, "\x00\x00", 2); /* SGN_ALG = DES MAC MD5 */
+ p += 2;
+
+ memcpy (p, "\xff\xff\xff\xff", 4); /* Filler */
+ p += 4;
+
+ /* Fill in later (SND-SEQ) */
+ memset (p, 0, 16);
+ p += 16;
+
+ /* checksum */
+ MD5_Init (&md5);
+ MD5_Update (&md5, p - 24, 8);
+ MD5_Update (&md5, message_buffer->value, message_buffer->length);
+ MD5_Final (hash, &md5);
+
+ memset (&zero, 0, sizeof(zero));
+ memcpy (&deskey, key->keyvalue.data, sizeof(deskey));
+ DES_set_key (&deskey, &schedule);
+ DES_cbc_cksum ((void *)hash, (void *)hash, sizeof(hash),
+ &schedule, &zero);
+ memcpy (p - 8, hash, 8); /* SGN_CKSUM */
+
+ HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
+ /* sequence number */
+ krb5_auth_con_getlocalseqnumber (gssapi_krb5_context,
+ context_handle->auth_context,
+ &seq_number);
+
+ p -= 16; /* SND_SEQ */
+ p[0] = (seq_number >> 0) & 0xFF;
+ p[1] = (seq_number >> 8) & 0xFF;
+ p[2] = (seq_number >> 16) & 0xFF;
+ p[3] = (seq_number >> 24) & 0xFF;
+ memset (p + 4,
+ (context_handle->more_flags & LOCAL) ? 0 : 0xFF,
+ 4);
+
+ DES_set_key (&deskey, &schedule);
+ DES_cbc_encrypt ((void *)p, (void *)p, 8,
+ &schedule, (DES_cblock *)(p + 8), DES_ENCRYPT);
+
+ krb5_auth_con_setlocalseqnumber (gssapi_krb5_context,
+ context_handle->auth_context,
+ ++seq_number);
+ HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
+
+ memset (deskey, 0, sizeof(deskey));
+ memset (&schedule, 0, sizeof(schedule));
+
+ *minor_status = 0;
+ return GSS_S_COMPLETE;
+}
+
+static OM_uint32
+mic_des3
+ (OM_uint32 * minor_status,
+ const gss_ctx_id_t context_handle,
+ gss_qop_t qop_req,
+ const gss_buffer_t message_buffer,
+ gss_buffer_t message_token,
+ krb5_keyblock *key
+ )
+{
+ u_char *p;
+ Checksum cksum;
+ u_char seq[8];
+
+ int32_t seq_number;
+ size_t len, total_len;
+
+ krb5_crypto crypto;
+ krb5_error_code kret;
+ krb5_data encdata;
+ char *tmp;
+ char ivec[8];
+
+ gssapi_krb5_encap_length (36, &len, &total_len, GSS_KRB5_MECHANISM);
+
+ message_token->length = total_len;
+ message_token->value = malloc (total_len);
+ if (message_token->value == NULL) {
+ *minor_status = ENOMEM;
+ return GSS_S_FAILURE;
+ }
+
+ p = gssapi_krb5_make_header(message_token->value,
+ len,
+ "\x01\x01", /* TOK-ID */
+ GSS_KRB5_MECHANISM);
+
+ memcpy (p, "\x04\x00", 2); /* SGN_ALG = HMAC SHA1 DES3-KD */
+ p += 2;
+
+ memcpy (p, "\xff\xff\xff\xff", 4); /* filler */
+ p += 4;
+
+ /* this should be done in parts */
+
+ tmp = malloc (message_buffer->length + 8);
+ if (tmp == NULL) {
+ free (message_token->value);
+ *minor_status = ENOMEM;
+ return GSS_S_FAILURE;
+ }
+ memcpy (tmp, p - 8, 8);
+ memcpy (tmp + 8, message_buffer->value, message_buffer->length);
+
+ kret = krb5_crypto_init(gssapi_krb5_context, key, 0, &crypto);
+ if (kret) {
+ free (message_token->value);
+ free (tmp);
+ gssapi_krb5_set_error_string ();
+ *minor_status = kret;
+ return GSS_S_FAILURE;
+ }
+
+ kret = krb5_create_checksum (gssapi_krb5_context,
+ crypto,
+ KRB5_KU_USAGE_SIGN,
+ 0,
+ tmp,
+ message_buffer->length + 8,
+ &cksum);
+ free (tmp);
+ krb5_crypto_destroy (gssapi_krb5_context, crypto);
+ if (kret) {
+ free (message_token->value);
+ gssapi_krb5_set_error_string ();
+ *minor_status = kret;
+ return GSS_S_FAILURE;
+ }
+
+ memcpy (p + 8, cksum.checksum.data, cksum.checksum.length);
+
+ HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
+ /* sequence number */
+ krb5_auth_con_getlocalseqnumber (gssapi_krb5_context,
+ context_handle->auth_context,
+ &seq_number);
+
+ seq[0] = (seq_number >> 0) & 0xFF;
+ seq[1] = (seq_number >> 8) & 0xFF;
+ seq[2] = (seq_number >> 16) & 0xFF;
+ seq[3] = (seq_number >> 24) & 0xFF;
+ memset (seq + 4,
+ (context_handle->more_flags & LOCAL) ? 0 : 0xFF,
+ 4);
+
+ kret = krb5_crypto_init(gssapi_krb5_context, key,
+ ETYPE_DES3_CBC_NONE, &crypto);
+ if (kret) {
+ free (message_token->value);
+ gssapi_krb5_set_error_string ();
+ *minor_status = kret;
+ return GSS_S_FAILURE;
+ }
+
+ if (context_handle->more_flags & COMPAT_OLD_DES3)
+ memset(ivec, 0, 8);
+ else
+ memcpy(ivec, p + 8, 8);
+
+ kret = krb5_encrypt_ivec (gssapi_krb5_context,
+ crypto,
+ KRB5_KU_USAGE_SEQ,
+ seq, 8, &encdata, ivec);
+ krb5_crypto_destroy (gssapi_krb5_context, crypto);
+ if (kret) {
+ free (message_token->value);
+ gssapi_krb5_set_error_string ();
+ *minor_status = kret;
+ return GSS_S_FAILURE;
+ }
+
+ assert (encdata.length == 8);
+
+ memcpy (p, encdata.data, encdata.length);
+ krb5_data_free (&encdata);
+
+ krb5_auth_con_setlocalseqnumber (gssapi_krb5_context,
+ context_handle->auth_context,
+ ++seq_number);
+ HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
+
+ free_Checksum (&cksum);
+ *minor_status = 0;
+ return GSS_S_COMPLETE;
+}
+
+OM_uint32 gss_get_mic
+ (OM_uint32 * minor_status,
+ const gss_ctx_id_t context_handle,
+ gss_qop_t qop_req,
+ const gss_buffer_t message_buffer,
+ gss_buffer_t message_token
+ )
+{
+ krb5_keyblock *key;
+ OM_uint32 ret;
+ krb5_keytype keytype;
+
+ ret = gss_krb5_get_subkey(context_handle, &key);
+ if (ret) {
+ gssapi_krb5_set_error_string ();
+ *minor_status = ret;
+ return GSS_S_FAILURE;
+ }
+ krb5_enctype_to_keytype (gssapi_krb5_context, key->keytype, &keytype);
+
+ switch (keytype) {
+ case KEYTYPE_DES :
+ ret = mic_des (minor_status, context_handle, qop_req,
+ message_buffer, message_token, key);
+ break;
+ case KEYTYPE_DES3 :
+ ret = mic_des3 (minor_status, context_handle, qop_req,
+ message_buffer, message_token, key);
+ break;
+ case KEYTYPE_ARCFOUR:
+ case KEYTYPE_ARCFOUR_56:
+ ret = _gssapi_get_mic_arcfour (minor_status, context_handle, qop_req,
+ message_buffer, message_token, key);
+ break;
+ default :
+ ret = _gssapi_mic_cfx (minor_status, context_handle, qop_req,
+ message_buffer, message_token, key);
+ break;
+ }
+ krb5_free_keyblock (gssapi_krb5_context, key);
+ return ret;
+}