diff options
Diffstat (limited to 'crypto/heimdal/lib/gssapi/verify_mic.c')
| -rw-r--r-- | crypto/heimdal/lib/gssapi/verify_mic.c | 322 |
1 files changed, 0 insertions, 322 deletions
diff --git a/crypto/heimdal/lib/gssapi/verify_mic.c b/crypto/heimdal/lib/gssapi/verify_mic.c deleted file mode 100644 index aef2d07..0000000 --- a/crypto/heimdal/lib/gssapi/verify_mic.c +++ /dev/null @@ -1,322 +0,0 @@ -/* - * 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: verify_mic.c,v 1.18.2.4 2003/09/18 22:05:34 lha Exp $"); - -static OM_uint32 -verify_mic_des - (OM_uint32 * minor_status, - const gss_ctx_id_t context_handle, - const gss_buffer_t message_buffer, - const gss_buffer_t token_buffer, - gss_qop_t * qop_state, - krb5_keyblock *key, - char *type - ) -{ - u_char *p; - MD5_CTX md5; - u_char hash[16], seq_data[8]; - des_key_schedule schedule; - des_cblock zero; - des_cblock deskey; - int32_t seq_number; - OM_uint32 ret; - - p = token_buffer->value; - ret = gssapi_krb5_verify_header (&p, - token_buffer->length, - type); - if (ret) - return ret; - - if (memcmp(p, "\x00\x00", 2) != 0) - return GSS_S_BAD_SIG; - p += 2; - if (memcmp (p, "\xff\xff\xff\xff", 4) != 0) - return GSS_S_BAD_MIC; - p += 4; - p += 16; - - /* verify 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); - if (memcmp (p - 8, hash, 8) != 0) { - memset (deskey, 0, sizeof(deskey)); - memset (schedule, 0, sizeof(schedule)); - return GSS_S_BAD_MIC; - } - - /* verify sequence number */ - - krb5_auth_getremoteseqnumber (gssapi_krb5_context, - context_handle->auth_context, - &seq_number); - seq_data[0] = (seq_number >> 0) & 0xFF; - seq_data[1] = (seq_number >> 8) & 0xFF; - seq_data[2] = (seq_number >> 16) & 0xFF; - seq_data[3] = (seq_number >> 24) & 0xFF; - memset (seq_data + 4, - (context_handle->more_flags & LOCAL) ? 0xFF : 0, - 4); - - p -= 16; - des_set_key (&deskey, schedule); - des_cbc_encrypt ((void *)p, (void *)p, 8, - schedule, (des_cblock *)hash, DES_DECRYPT); - - memset (deskey, 0, sizeof(deskey)); - memset (schedule, 0, sizeof(schedule)); - - if (memcmp (p, seq_data, 8) != 0) { - return GSS_S_BAD_MIC; - } - - krb5_auth_con_setremoteseqnumber (gssapi_krb5_context, - context_handle->auth_context, - ++seq_number); - - return GSS_S_COMPLETE; -} - -static OM_uint32 -verify_mic_des3 - (OM_uint32 * minor_status, - const gss_ctx_id_t context_handle, - const gss_buffer_t message_buffer, - const gss_buffer_t token_buffer, - gss_qop_t * qop_state, - krb5_keyblock *key, - char *type - ) -{ - u_char *p; - u_char seq[8]; - int32_t seq_number; - OM_uint32 ret; - krb5_crypto crypto; - krb5_data seq_data; - int cmp, docompat; - Checksum csum; - char *tmp; - char ivec[8]; - - p = token_buffer->value; - ret = gssapi_krb5_verify_header (&p, - token_buffer->length, - type); - if (ret) - return ret; - - if (memcmp(p, "\x04\x00", 2) != 0) /* SGN_ALG = HMAC SHA1 DES3-KD */ - return GSS_S_BAD_SIG; - p += 2; - if (memcmp (p, "\xff\xff\xff\xff", 4) != 0) - return GSS_S_BAD_MIC; - p += 4; - - ret = krb5_crypto_init(gssapi_krb5_context, key, - ETYPE_DES3_CBC_NONE, &crypto); - if (ret){ - gssapi_krb5_set_error_string (); - *minor_status = ret; - return GSS_S_FAILURE; - } - - /* verify sequence number */ - docompat = 0; -retry: - if (docompat) - memset(ivec, 0, 8); - else - memcpy(ivec, p + 8, 8); - - ret = krb5_decrypt_ivec (gssapi_krb5_context, - crypto, - KRB5_KU_USAGE_SEQ, - p, 8, &seq_data, ivec); - if (ret) { - if (docompat++) { - gssapi_krb5_set_error_string (); - krb5_crypto_destroy (gssapi_krb5_context, crypto); - *minor_status = ret; - return GSS_S_FAILURE; - } else - goto retry; - } - - if (seq_data.length != 8) { - krb5_data_free (&seq_data); - if (docompat++) { - krb5_crypto_destroy (gssapi_krb5_context, crypto); - return GSS_S_BAD_MIC; - } else - goto retry; - } - - krb5_auth_getremoteseqnumber (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) ? 0xFF : 0, - 4); - cmp = memcmp (seq, seq_data.data, seq_data.length); - krb5_data_free (&seq_data); - if (cmp != 0) { - if (docompat++) { - krb5_crypto_destroy (gssapi_krb5_context, crypto); - return GSS_S_BAD_MIC; - } else - goto retry; - } - - /* verify checksum */ - - tmp = malloc (message_buffer->length + 8); - if (tmp == NULL) { - krb5_crypto_destroy (gssapi_krb5_context, crypto); - *minor_status = ENOMEM; - return GSS_S_FAILURE; - } - - memcpy (tmp, p - 8, 8); - memcpy (tmp + 8, message_buffer->value, message_buffer->length); - - csum.cksumtype = CKSUMTYPE_HMAC_SHA1_DES3; - csum.checksum.length = 20; - csum.checksum.data = p + 8; - - ret = krb5_verify_checksum (gssapi_krb5_context, crypto, - KRB5_KU_USAGE_SIGN, - tmp, message_buffer->length + 8, - &csum); - free (tmp); - if (ret) { - gssapi_krb5_set_error_string (); - krb5_crypto_destroy (gssapi_krb5_context, crypto); - *minor_status = ret; - return GSS_S_BAD_MIC; - } - - krb5_auth_con_setremoteseqnumber (gssapi_krb5_context, - context_handle->auth_context, - ++seq_number); - - krb5_crypto_destroy (gssapi_krb5_context, crypto); - return GSS_S_COMPLETE; -} - -OM_uint32 -gss_verify_mic_internal - (OM_uint32 * minor_status, - const gss_ctx_id_t context_handle, - const gss_buffer_t message_buffer, - const gss_buffer_t token_buffer, - gss_qop_t * qop_state, - char * type - ) -{ - krb5_keyblock *key; - OM_uint32 ret; - krb5_keytype keytype; - - ret = gss_krb5_get_remotekey(context_handle, &key); - if (ret) { - gssapi_krb5_set_error_string (); - *minor_status = ret; - return GSS_S_FAILURE; - } - *minor_status = 0; - krb5_enctype_to_keytype (gssapi_krb5_context, key->keytype, &keytype); - switch (keytype) { - case KEYTYPE_DES : - ret = verify_mic_des (minor_status, context_handle, - message_buffer, token_buffer, qop_state, key, - type); - break; - case KEYTYPE_DES3 : - ret = verify_mic_des3 (minor_status, context_handle, - message_buffer, token_buffer, qop_state, key, - type); - break; - case KEYTYPE_ARCFOUR : - ret = _gssapi_verify_mic_arcfour (minor_status, context_handle, - message_buffer, token_buffer, - qop_state, key, type); - break; - default : - *minor_status = KRB5_PROG_ETYPE_NOSUPP; - ret = GSS_S_FAILURE; - break; - } - krb5_free_keyblock (gssapi_krb5_context, key); - - return ret; -} - -OM_uint32 -gss_verify_mic - (OM_uint32 * minor_status, - const gss_ctx_id_t context_handle, - const gss_buffer_t message_buffer, - const gss_buffer_t token_buffer, - gss_qop_t * qop_state - ) -{ - OM_uint32 ret; - - if (qop_state != NULL) - *qop_state = GSS_C_QOP_DEFAULT; - - ret = gss_verify_mic_internal(minor_status, context_handle, - message_buffer, token_buffer, - qop_state, "\x01\x01"); - - return ret; -} |
