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include the confounder in the checksum

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use the right key usage number for warped/unwraped tokens


git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@12680 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2003-08-28 07:17:33 +00:00
parent 0ec5289d77
commit 9f9fde52a7
2 changed files with 58 additions and 50 deletions
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54
lib/gssapi/arcfour.c
View File

@@ -75,7 +75,7 @@ arcfour_mic_key(krb5_context context, krb5_keyblock *key,
static krb5_error_code
arcfour_mic_cksum(krb5_keyblock *key,
arcfour_mic_cksum(krb5_keyblock *key, unsigned usage,
u_char *sgn_cksum, size_t sgn_cksum_sz,
const char *v1, size_t l1,
const void *v2, size_t l2,
@@ -107,7 +107,7 @@ arcfour_mic_cksum(krb5_keyblock *key,
ret = krb5_create_checksum(gssapi_krb5_context,
crypto,
KRB5_KU_USAGE_SIGN,
usage,
0,
ptr, len,
&CKSUM);
@@ -159,7 +159,8 @@ _gssapi_get_mic_arcfour(OM_uint32 * minor_status,
token->Filler[2] = 0xff;
token->Filler[3] = 0xff;
ret = arcfour_mic_cksum(key, token->SGN_CKSUM, 8,
ret = arcfour_mic_cksum(key, KRB5_KU_USAGE_SIGN,
token->SGN_CKSUM, 8,
p, 8,
message_buffer->value, message_buffer->length,
NULL, 0);
@@ -194,7 +195,7 @@ _gssapi_get_mic_arcfour(OM_uint32 * minor_status,
HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
memset (p + 4,
(context_handle->more_flags & LOCAL) ? 0xFF : 0,
(context_handle->more_flags & LOCAL) ? 0 : 0xff,
4);
/* draft: RC4(K6, seq_plus_direction, 8, MIC_seq); */
@@ -243,7 +244,8 @@ _gssapi_verify_mic_arcfour(OM_uint32 * minor_status,
return GSS_S_BAD_MIC;
p += 4;
ret = arcfour_mic_cksum(key, cksum_data, sizeof(cksum_data),
ret = arcfour_mic_cksum(key, KRB5_KU_USAGE_SIGN,
cksum_data, sizeof(cksum_data),
p - 8, 8,
message_buffer->value, message_buffer->length,
NULL, 0);
@@ -279,9 +281,9 @@ _gssapi_verify_mic_arcfour(OM_uint32 * minor_status,
gssapi_decode_be_om_uint32(SND_SEQ, &seq_number);
if (context_handle->more_flags & LOCAL)
cmp = memcmp(&SND_SEQ[4], "\x00\x00\x00\x00", 4);
else
cmp = memcmp(&SND_SEQ[4], "\xff\xff\xff\xff", 4);
else
cmp = memcmp(&SND_SEQ[4], "\x00\x00\x00\x00", 4);
memset(SND_SEQ, 0, sizeof(SND_SEQ));
if (cmp != 0) {
@@ -361,17 +363,22 @@ _gssapi_wrap_arcfour(OM_uint32 * minor_status,
HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
memset (p + 4,
(context_handle->more_flags & LOCAL) ? 0xFF : 0,
(context_handle->more_flags & LOCAL) ? 0 : 0xff,
4);
/* Confounder */
krb5_generate_random_block(token->Confounder, sizeof(token->Confounder));
ret = arcfour_mic_cksum(key, token->SGN_CKSUM, 8,
p - 8, 8,
p += 24; /* skip SND_SEQ, SGN_CKSUM, and Confounder */
memcpy(p, input_message_buffer->value, input_message_buffer->length);
p[input_message_buffer->length] = 0; /* PADDING */
ret = arcfour_mic_cksum(key, KRB5_KU_USAGE_SEAL,
token->SGN_CKSUM, 8,
p - 32, 8,
token->Confounder, sizeof(token->Confounder),
input_message_buffer->value,
input_message_buffer->length);
p,
input_message_buffer->length + 1);
if (ret) {
*minor_status = ret;
gss_release_buffer(minor_status, input_message_buffer);
@@ -389,7 +396,7 @@ _gssapi_wrap_arcfour(OM_uint32 * minor_status,
Klocaldata[i] = ((u_char *)key->keyvalue.data)[i] ^ 0xF0;
}
ret = arcfour_mic_key(gssapi_krb5_context, &Klocal,
p, 4,
p - 24, 4,
k6_data, sizeof(k6_data));
memset(Klocaldata, 0, sizeof(Klocaldata));
if (ret) {
@@ -398,10 +405,6 @@ _gssapi_wrap_arcfour(OM_uint32 * minor_status,
return GSS_S_FAILURE;
}
p += 24; /* skip SND_SEQ, SGN_CKSUM, and Confounder */
memcpy(p, input_message_buffer->value, input_message_buffer->length);
p[input_message_buffer->length] = 0; /* PADDING */
if(conf_req_flag) {
RC4_KEY rc4_key;
@@ -512,9 +515,9 @@ OM_uint32 _gssapi_unwrap_arcfour(OM_uint32 *minor_status,
gssapi_decode_be_om_uint32(SND_SEQ, &seq_number);
if (context_handle->more_flags & LOCAL)
cmp = memcmp(&SND_SEQ[4], "\x00\x00\x00\x00", 4);
else
cmp = memcmp(&SND_SEQ[4], "\xff\xff\xff\xff", 4);
else
cmp = memcmp(&SND_SEQ[4], "\x00\x00\x00\x00", 4);
if (cmp != 0) {
*minor_status = 0;
@@ -540,7 +543,7 @@ OM_uint32 _gssapi_unwrap_arcfour(OM_uint32 *minor_status,
return GSS_S_FAILURE;
}
output_message_buffer->value = malloc(datalen + 8);
output_message_buffer->value = malloc(datalen);
if (output_message_buffer->value == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
@@ -552,23 +555,24 @@ OM_uint32 _gssapi_unwrap_arcfour(OM_uint32 *minor_status,
RC4_set_key (&rc4_key, sizeof(k6_data), k6_data);
RC4 (&rc4_key, 8, token->Confounder, Confounder);
RC4 (&rc4_key, datalen, token->Confounder + 8,
RC4 (&rc4_key, datalen, token->Confounder + 8,
output_message_buffer->value);
memset(&rc4_key, 0, sizeof(rc4_key));
} else {
memcpy(Confounder, token->Confounder, 8);
memcpy(output_message_buffer->value, token->Confounder + 8,datalen - 1);
memcpy(output_message_buffer->value, token->Confounder + 8, datalen);
}
memset(k6_data, 0, sizeof(k6_data));
ret = arcfour_mic_cksum(key, cksum_data, sizeof(cksum_data),
ret = arcfour_mic_cksum(key, KRB5_KU_USAGE_SEAL,
cksum_data, sizeof(cksum_data),
p - 8, 8,
Confounder, sizeof(Confounder),
output_message_buffer->value,
output_message_buffer->length);
output_message_buffer->length + 1);
if (ret) {
*minor_status = ret;
gss_release_buffer(minor_status, input_message_buffer);
*minor_status = ret;
return GSS_S_FAILURE;
}

54
lib/gssapi/krb5/arcfour.c
View File

@@ -75,7 +75,7 @@ arcfour_mic_key(krb5_context context, krb5_keyblock *key,
static krb5_error_code
arcfour_mic_cksum(krb5_keyblock *key,
arcfour_mic_cksum(krb5_keyblock *key, unsigned usage,
u_char *sgn_cksum, size_t sgn_cksum_sz,
const char *v1, size_t l1,
const void *v2, size_t l2,
@@ -107,7 +107,7 @@ arcfour_mic_cksum(krb5_keyblock *key,
ret = krb5_create_checksum(gssapi_krb5_context,
crypto,
KRB5_KU_USAGE_SIGN,
usage,
0,
ptr, len,
&CKSUM);
@@ -159,7 +159,8 @@ _gssapi_get_mic_arcfour(OM_uint32 * minor_status,
token->Filler[2] = 0xff;
token->Filler[3] = 0xff;
ret = arcfour_mic_cksum(key, token->SGN_CKSUM, 8,
ret = arcfour_mic_cksum(key, KRB5_KU_USAGE_SIGN,
token->SGN_CKSUM, 8,
p, 8,
message_buffer->value, message_buffer->length,
NULL, 0);
@@ -194,7 +195,7 @@ _gssapi_get_mic_arcfour(OM_uint32 * minor_status,
HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
memset (p + 4,
(context_handle->more_flags & LOCAL) ? 0xFF : 0,
(context_handle->more_flags & LOCAL) ? 0 : 0xff,
4);
/* draft: RC4(K6, seq_plus_direction, 8, MIC_seq); */
@@ -243,7 +244,8 @@ _gssapi_verify_mic_arcfour(OM_uint32 * minor_status,
return GSS_S_BAD_MIC;
p += 4;
ret = arcfour_mic_cksum(key, cksum_data, sizeof(cksum_data),
ret = arcfour_mic_cksum(key, KRB5_KU_USAGE_SIGN,
cksum_data, sizeof(cksum_data),
p - 8, 8,
message_buffer->value, message_buffer->length,
NULL, 0);
@@ -279,9 +281,9 @@ _gssapi_verify_mic_arcfour(OM_uint32 * minor_status,
gssapi_decode_be_om_uint32(SND_SEQ, &seq_number);
if (context_handle->more_flags & LOCAL)
cmp = memcmp(&SND_SEQ[4], "\x00\x00\x00\x00", 4);
else
cmp = memcmp(&SND_SEQ[4], "\xff\xff\xff\xff", 4);
else
cmp = memcmp(&SND_SEQ[4], "\x00\x00\x00\x00", 4);
memset(SND_SEQ, 0, sizeof(SND_SEQ));
if (cmp != 0) {
@@ -361,17 +363,22 @@ _gssapi_wrap_arcfour(OM_uint32 * minor_status,
HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
memset (p + 4,
(context_handle->more_flags & LOCAL) ? 0xFF : 0,
(context_handle->more_flags & LOCAL) ? 0 : 0xff,
4);
/* Confounder */
krb5_generate_random_block(token->Confounder, sizeof(token->Confounder));
ret = arcfour_mic_cksum(key, token->SGN_CKSUM, 8,
p - 8, 8,
p += 24; /* skip SND_SEQ, SGN_CKSUM, and Confounder */
memcpy(p, input_message_buffer->value, input_message_buffer->length);
p[input_message_buffer->length] = 0; /* PADDING */
ret = arcfour_mic_cksum(key, KRB5_KU_USAGE_SEAL,
token->SGN_CKSUM, 8,
p - 32, 8,
token->Confounder, sizeof(token->Confounder),
input_message_buffer->value,
input_message_buffer->length);
p,
input_message_buffer->length + 1);
if (ret) {
*minor_status = ret;
gss_release_buffer(minor_status, input_message_buffer);
@@ -389,7 +396,7 @@ _gssapi_wrap_arcfour(OM_uint32 * minor_status,
Klocaldata[i] = ((u_char *)key->keyvalue.data)[i] ^ 0xF0;
}
ret = arcfour_mic_key(gssapi_krb5_context, &Klocal,
p, 4,
p - 24, 4,
k6_data, sizeof(k6_data));
memset(Klocaldata, 0, sizeof(Klocaldata));
if (ret) {
@@ -398,10 +405,6 @@ _gssapi_wrap_arcfour(OM_uint32 * minor_status,
return GSS_S_FAILURE;
}
p += 24; /* skip SND_SEQ, SGN_CKSUM, and Confounder */
memcpy(p, input_message_buffer->value, input_message_buffer->length);
p[input_message_buffer->length] = 0; /* PADDING */
if(conf_req_flag) {
RC4_KEY rc4_key;
@@ -512,9 +515,9 @@ OM_uint32 _gssapi_unwrap_arcfour(OM_uint32 *minor_status,
gssapi_decode_be_om_uint32(SND_SEQ, &seq_number);
if (context_handle->more_flags & LOCAL)
cmp = memcmp(&SND_SEQ[4], "\x00\x00\x00\x00", 4);
else
cmp = memcmp(&SND_SEQ[4], "\xff\xff\xff\xff", 4);
else
cmp = memcmp(&SND_SEQ[4], "\x00\x00\x00\x00", 4);
if (cmp != 0) {
*minor_status = 0;
@@ -540,7 +543,7 @@ OM_uint32 _gssapi_unwrap_arcfour(OM_uint32 *minor_status,
return GSS_S_FAILURE;
}
output_message_buffer->value = malloc(datalen + 8);
output_message_buffer->value = malloc(datalen);
if (output_message_buffer->value == NULL) {
*minor_status = ENOMEM;
return GSS_S_FAILURE;
@@ -552,23 +555,24 @@ OM_uint32 _gssapi_unwrap_arcfour(OM_uint32 *minor_status,
RC4_set_key (&rc4_key, sizeof(k6_data), k6_data);
RC4 (&rc4_key, 8, token->Confounder, Confounder);
RC4 (&rc4_key, datalen, token->Confounder + 8,
RC4 (&rc4_key, datalen, token->Confounder + 8,
output_message_buffer->value);
memset(&rc4_key, 0, sizeof(rc4_key));
} else {
memcpy(Confounder, token->Confounder, 8);
memcpy(output_message_buffer->value, token->Confounder + 8,datalen - 1);
memcpy(output_message_buffer->value, token->Confounder + 8, datalen);
}
memset(k6_data, 0, sizeof(k6_data));
ret = arcfour_mic_cksum(key, cksum_data, sizeof(cksum_data),
ret = arcfour_mic_cksum(key, KRB5_KU_USAGE_SEAL,
cksum_data, sizeof(cksum_data),
p - 8, 8,
Confounder, sizeof(Confounder),
output_message_buffer->value,
output_message_buffer->length);
output_message_buffer->length + 1);
if (ret) {
*minor_status = ret;
gss_release_buffer(minor_status, input_message_buffer);
*minor_status = ret;
return GSS_S_FAILURE;
}