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libwinpr-sspi: fix SeqNo size

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This commit is contained in:
Marc-André Moreau 2012-06-29 08:55:03 -04:00
parent a1355135c5
commit 1ed7442db6
1 changed files with 8 additions and 4 deletions
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12
winpr/sspi/NTLM/ntlm.c
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@ -500,6 +500,7 @@ SECURITY_STATUS SEC_ENTRY ntlm_EncryptMessage(PCtxtHandle phContext, ULONG fQOP,
int index;
int length;
void* data;
UINT32 SeqNo;
HMAC_CTX hmac;
BYTE digest[16];
BYTE checksum[8];
@ -509,6 +510,7 @@ SECURITY_STATUS SEC_ENTRY ntlm_EncryptMessage(PCtxtHandle phContext, ULONG fQOP,
PSecBuffer data_buffer = NULL;
PSecBuffer signature_buffer = NULL;
SeqNo = MessageSeqNo;
context = (NTLM_CONTEXT*) sspi_SecureHandleGetLowerPointer(phContext);
for (index = 0; index < (int) pMessage->cBuffers; index++)
@ -533,7 +535,7 @@ SECURITY_STATUS SEC_ENTRY ntlm_EncryptMessage(PCtxtHandle phContext, ULONG fQOP,
/* Compute the HMAC-MD5 hash of ConcatenationOf(seq_num,data) using the client signing key */
HMAC_CTX_init(&hmac);
HMAC_Init_ex(&hmac, context->SendSigningKey, 16, EVP_md5(), NULL);
HMAC_Update(&hmac, (void*) &(MessageSeqNo), 4);
HMAC_Update(&hmac, (void*) &(SeqNo), 4);
HMAC_Update(&hmac, data, length);
HMAC_Final(&hmac, digest, NULL);
HMAC_CTX_cleanup(&hmac);
@ -565,7 +567,7 @@ SECURITY_STATUS SEC_ENTRY ntlm_EncryptMessage(PCtxtHandle phContext, ULONG fQOP,
/* Concatenate version, ciphertext and sequence number to build signature */
CopyMemory(signature, (void*) &version, 4);
CopyMemory(&signature[4], (void*) checksum, 8);
CopyMemory(&signature[12], (void*) &(MessageSeqNo), 4);
CopyMemory(&signature[12], (void*) &(SeqNo), 4);
context->SendSeqNum++;
#ifdef WITH_DEBUG_NTLM
@ -582,6 +584,7 @@ SECURITY_STATUS SEC_ENTRY ntlm_DecryptMessage(PCtxtHandle phContext, PSecBufferD
int index;
int length;
void* data;
UINT32 SeqNo;
HMAC_CTX hmac;
BYTE digest[16];
BYTE checksum[8];
@ -591,6 +594,7 @@ SECURITY_STATUS SEC_ENTRY ntlm_DecryptMessage(PCtxtHandle phContext, PSecBufferD
PSecBuffer data_buffer = NULL;
PSecBuffer signature_buffer = NULL;
SeqNo = (UINT32) MessageSeqNo;
context = sspi_SecureHandleGetLowerPointer(phContext);
for (index = 0; index < (int) pMessage->cBuffers; index++)
@ -622,7 +626,7 @@ SECURITY_STATUS SEC_ENTRY ntlm_DecryptMessage(PCtxtHandle phContext, PSecBufferD
/* Compute the HMAC-MD5 hash of ConcatenationOf(seq_num,data) using the client signing key */
HMAC_CTX_init(&hmac);
HMAC_Init_ex(&hmac, context->RecvSigningKey, 16, EVP_md5(), NULL);
HMAC_Update(&hmac, (void*) &(MessageSeqNo), 4);
HMAC_Update(&hmac, (void*) &(SeqNo), 4);
HMAC_Update(&hmac, data_buffer->pvBuffer, data_buffer->cbBuffer);
HMAC_Final(&hmac, digest, NULL);
HMAC_CTX_cleanup(&hmac);
@ -645,7 +649,7 @@ SECURITY_STATUS SEC_ENTRY ntlm_DecryptMessage(PCtxtHandle phContext, PSecBufferD
/* Concatenate version, ciphertext and sequence number to build signature */
CopyMemory(expected_signature, (void*) &version, 4);
CopyMemory(&expected_signature[4], (void*) checksum, 8);
CopyMemory(&expected_signature[12], (void*) &(MessageSeqNo), 4);
CopyMemory(&expected_signature[12], (void*) &(SeqNo), 4);
context->RecvSeqNum++;
if (memcmp(signature_buffer->pvBuffer, expected_signature, 16) != 0)