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-rw-r--r--lib/gssapi/krb5/unwrap.c191
1 files changed, 113 insertions, 78 deletions
diff --git a/lib/gssapi/krb5/unwrap.c b/lib/gssapi/krb5/unwrap.c
index d0a33d86fbfc..d6bc20477787 100644
--- a/lib/gssapi/krb5/unwrap.c
+++ b/lib/gssapi/krb5/unwrap.c
@@ -1,39 +1,39 @@
/*
- * Copyright (c) 1997 - 2004 Kungliga Tekniska Högskolan
- * (Royal Institute of Technology, Stockholm, Sweden).
- * All rights reserved.
+ * Copyright (c) 1997 - 2004 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:
+ * 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.
+ * 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.
+ * 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.
+ * 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.
+ * 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 "krb5/gsskrb5_locl.h"
+#include "gsskrb5_locl.h"
-RCSID("$Id: unwrap.c 19031 2006-11-13 18:02:57Z lha $");
+#ifdef HEIM_WEAK_CRYPTO
static OM_uint32
unwrap_des
@@ -48,21 +48,29 @@ unwrap_des
{
u_char *p, *seq;
size_t len;
- MD5_CTX md5;
+ EVP_MD_CTX *md5;
u_char hash[16];
+ EVP_CIPHER_CTX des_ctx;
DES_key_schedule schedule;
DES_cblock deskey;
DES_cblock zero;
- int i;
+ size_t i;
uint32_t seq_number;
size_t padlength;
OM_uint32 ret;
int cstate;
int cmp;
+ int token_len;
+
+ if (IS_DCE_STYLE(context_handle)) {
+ token_len = 22 + 8 + 15; /* 45 */
+ } else {
+ token_len = input_message_buffer->length;
+ }
p = input_message_buffer->value;
ret = _gsskrb5_verify_header (&p,
- input_message_buffer->length,
+ token_len,
"\x02\x01",
GSS_KRB5_MECHANISM);
if (ret)
@@ -90,49 +98,56 @@ unwrap_des
if(cstate) {
/* decrypt data */
memcpy (&deskey, key->keyvalue.data, sizeof(deskey));
+ memset (&zero, 0, sizeof(zero));
for (i = 0; i < sizeof(deskey); ++i)
deskey[i] ^= 0xf0;
- DES_set_key (&deskey, &schedule);
- memset (&zero, 0, sizeof(zero));
- DES_cbc_encrypt ((void *)p,
- (void *)p,
- input_message_buffer->length - len,
- &schedule,
- &zero,
- DES_DECRYPT);
-
- memset (deskey, 0, sizeof(deskey));
+
+
+ EVP_CIPHER_CTX_init(&des_ctx);
+ EVP_CipherInit_ex(&des_ctx, EVP_des_cbc(), NULL, deskey, zero, 0);
+ EVP_Cipher(&des_ctx, p, p, input_message_buffer->length - len);
+ EVP_CIPHER_CTX_cleanup(&des_ctx);
+
memset (&schedule, 0, sizeof(schedule));
}
- /* check pad */
- ret = _gssapi_verify_pad(input_message_buffer,
- input_message_buffer->length - len,
- &padlength);
- if (ret)
- return ret;
- MD5_Init (&md5);
- MD5_Update (&md5, p - 24, 8);
- MD5_Update (&md5, p, input_message_buffer->length - len);
- MD5_Final (hash, &md5);
+ if (IS_DCE_STYLE(context_handle)) {
+ padlength = 0;
+ } else {
+ /* check pad */
+ ret = _gssapi_verify_pad(input_message_buffer,
+ input_message_buffer->length - len,
+ &padlength);
+ if (ret)
+ return ret;
+ }
+
+ md5 = EVP_MD_CTX_create();
+ EVP_DigestInit_ex(md5, EVP_md5(), NULL);
+ EVP_DigestUpdate(md5, p - 24, 8);
+ EVP_DigestUpdate(md5, p, input_message_buffer->length - len);
+ EVP_DigestFinal_ex(md5, hash, NULL);
+ EVP_MD_CTX_destroy(md5);
memset (&zero, 0, sizeof(zero));
memcpy (&deskey, key->keyvalue.data, sizeof(deskey));
- DES_set_key (&deskey, &schedule);
+ DES_set_key_unchecked (&deskey, &schedule);
DES_cbc_cksum ((void *)hash, (void *)hash, sizeof(hash),
&schedule, &zero);
- if (memcmp (p - 8, hash, 8) != 0)
+ if (ct_memcmp (p - 8, hash, 8) != 0)
return GSS_S_BAD_MIC;
/* verify sequence number */
-
+
HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
p -= 16;
- DES_set_key (&deskey, &schedule);
- DES_cbc_encrypt ((void *)p, (void *)p, 8,
- &schedule, (DES_cblock *)hash, DES_DECRYPT);
+
+ EVP_CIPHER_CTX_init(&des_ctx);
+ EVP_CipherInit_ex(&des_ctx, EVP_des_cbc(), NULL, key->keyvalue.data, hash, 0);
+ EVP_Cipher(&des_ctx, p, p, 8);
+ EVP_CIPHER_CTX_cleanup(&des_ctx);
memset (deskey, 0, sizeof(deskey));
memset (&schedule, 0, sizeof(schedule));
@@ -141,9 +156,9 @@ unwrap_des
_gsskrb5_decode_om_uint32(seq, &seq_number);
if (context_handle->more_flags & LOCAL)
- cmp = memcmp(&seq[4], "\xff\xff\xff\xff", 4);
+ cmp = ct_memcmp(&seq[4], "\xff\xff\xff\xff", 4);
else
- cmp = memcmp(&seq[4], "\x00\x00\x00\x00", 4);
+ cmp = ct_memcmp(&seq[4], "\x00\x00\x00\x00", 4);
if (cmp != 0) {
HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
@@ -170,6 +185,7 @@ unwrap_des
output_message_buffer->length);
return GSS_S_COMPLETE;
}
+#endif
static OM_uint32
unwrap_des3
@@ -195,10 +211,17 @@ unwrap_des3
krb5_crypto crypto;
Checksum csum;
int cmp;
+ int token_len;
+
+ if (IS_DCE_STYLE(context_handle)) {
+ token_len = 34 + 8 + 15; /* 57 */
+ } else {
+ token_len = input_message_buffer->length;
+ }
p = input_message_buffer->value;
ret = _gsskrb5_verify_header (&p,
- input_message_buffer->length,
+ token_len,
"\x02\x01",
GSS_KRB5_MECHANISM);
if (ret)
@@ -207,16 +230,16 @@ unwrap_des3
if (memcmp (p, "\x04\x00", 2) != 0) /* HMAC SHA1 DES3_KD */
return GSS_S_BAD_SIG;
p += 2;
- if (memcmp (p, "\x02\x00", 2) == 0) {
+ if (ct_memcmp (p, "\x02\x00", 2) == 0) {
cstate = 1;
- } else if (memcmp (p, "\xff\xff", 2) == 0) {
+ } else if (ct_memcmp (p, "\xff\xff", 2) == 0) {
cstate = 0;
} else
return GSS_S_BAD_MIC;
p += 2;
if(conf_state != NULL)
*conf_state = cstate;
- if (memcmp (p, "\xff\xff", 2) != 0)
+ if (ct_memcmp (p, "\xff\xff", 2) != 0)
return GSS_S_DEFECTIVE_TOKEN;
p += 2;
p += 28;
@@ -245,15 +268,20 @@ unwrap_des3
memcpy (p, tmp.data, tmp.length);
krb5_data_free(&tmp);
}
- /* check pad */
- ret = _gssapi_verify_pad(input_message_buffer,
- input_message_buffer->length - len,
- &padlength);
- if (ret)
- return ret;
+
+ if (IS_DCE_STYLE(context_handle)) {
+ padlength = 0;
+ } else {
+ /* check pad */
+ ret = _gssapi_verify_pad(input_message_buffer,
+ input_message_buffer->length - len,
+ &padlength);
+ if (ret)
+ return ret;
+ }
/* verify sequence number */
-
+
HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
p -= 28;
@@ -292,10 +320,10 @@ unwrap_des3
_gsskrb5_decode_om_uint32(seq, &seq_number);
if (context_handle->more_flags & LOCAL)
- cmp = memcmp(&seq[4], "\xff\xff\xff\xff", 4);
+ cmp = ct_memcmp(&seq[4], "\xff\xff\xff\xff", 4);
else
- cmp = memcmp(&seq[4], "\x00\x00\x00\x00", 4);
-
+ cmp = ct_memcmp(&seq[4], "\x00\x00\x00\x00", 4);
+
krb5_data_free (&seq_data);
if (cmp != 0) {
*minor_status = 0;
@@ -352,7 +380,7 @@ unwrap_des3
return GSS_S_COMPLETE;
}
-OM_uint32 _gsskrb5_unwrap
+OM_uint32 GSSAPI_CALLCONV _gsskrb5_unwrap
(OM_uint32 * minor_status,
const gss_ctx_id_t context_handle,
const gss_buffer_t input_message_buffer,
@@ -369,11 +397,16 @@ OM_uint32 _gsskrb5_unwrap
output_message_buffer->value = NULL;
output_message_buffer->length = 0;
+ if (qop_state != NULL)
+ *qop_state = GSS_C_QOP_DEFAULT;
GSSAPI_KRB5_INIT (&context);
- if (qop_state != NULL)
- *qop_state = GSS_C_QOP_DEFAULT;
+ if (ctx->more_flags & IS_CFX)
+ return _gssapi_unwrap_cfx (minor_status, ctx, context,
+ input_message_buffer, output_message_buffer,
+ conf_state, qop_state);
+
HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
ret = _gsskrb5i_get_token_key(ctx, context, &key);
HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
@@ -387,9 +420,13 @@ OM_uint32 _gsskrb5_unwrap
switch (keytype) {
case KEYTYPE_DES :
+#ifdef HEIM_WEAK_CRYPTO
ret = unwrap_des (minor_status, ctx,
input_message_buffer, output_message_buffer,
conf_state, qop_state, key);
+#else
+ ret = GSS_S_FAILURE;
+#endif
break;
case KEYTYPE_DES3 :
ret = unwrap_des3 (minor_status, ctx, context,
@@ -403,9 +440,7 @@ OM_uint32 _gsskrb5_unwrap
conf_state, qop_state, key);
break;
default :
- ret = _gssapi_unwrap_cfx (minor_status, ctx, context,
- input_message_buffer, output_message_buffer,
- conf_state, qop_state, key);
+ abort();
break;
}
krb5_free_keyblock (context, key);
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 13:10:00 +0000