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libfreerdp-crypto: add comments for SSPI flags used in NLA

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This commit is contained in:
Marc-André Moreau 2012-06-18 01:01:08 -04:00
parent 1bf69d644e
commit 7afc130e50
2 changed files with 41 additions and 24 deletions
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1
include/winpr/sspi.h
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@ -101,6 +101,7 @@ typedef SecPkgInfoW* PSecPkgInfoW;
#endif
#define NTLMSP_NAME _T("NTLM")
#define NEGOSSP_NAME _T("Negotiate")
#endif

64
libfreerdp-crypto/nla.c
View File

@ -76,6 +76,12 @@
#define WITH_DEBUG_CREDSSP
#endif
#ifdef WITH_NATIVE_SSPI
#define NLA_PKG_NAME NEGOSSP_NAME
#else
#define NLA_PKG_NAME NTLMSP_NAME
#endif
#define TERMSRV_SPN_PREFIX "TERMSRV/"
void credssp_send(rdpCredssp* credssp);
@ -182,7 +188,7 @@ int credssp_client_authenticate(rdpCredssp* credssp)
INIT_SECURITY_INTERFACE InitSecurityInterface;
PSecurityFunctionTable pSecurityInterface = NULL;
hSSPI = LoadLibrary(_T("security.dll"));
hSSPI = LoadLibrary(_T("secur32.dll"));
#ifdef UNICODE
InitSecurityInterface = (INIT_SECURITY_INTERFACE) GetProcAddress(hSSPI, "InitSecurityInterfaceW");
@ -195,7 +201,7 @@ int credssp_client_authenticate(rdpCredssp* credssp)
credssp->table = InitSecurityInterface();
#endif
status = credssp->table->QuerySecurityPackageInfo(NTLMSP_NAME, &pPackageInfo);
status = credssp->table->QuerySecurityPackageInfo(NLA_PKG_NAME, &pPackageInfo);
if (status != SEC_E_OK)
{
@ -205,7 +211,7 @@ int credssp_client_authenticate(rdpCredssp* credssp)
cbMaxToken = pPackageInfo->cbMaxToken;
status = credssp->table->AcquireCredentialsHandle(NULL, NTLMSP_NAME,
status = credssp->table->AcquireCredentialsHandle(NULL, NLA_PKG_NAME,
SECPKG_CRED_OUTBOUND, NULL, &credssp->identity, NULL, NULL, &credentials, &expiration);
if (status != SEC_E_OK)
@ -221,7 +227,15 @@ int credssp_client_authenticate(rdpCredssp* credssp)
ZeroMemory(&output_buffer, sizeof(SecBuffer));
ZeroMemory(&credssp->ContextSizes, sizeof(SecPkgContext_Sizes));
fContextReq = ISC_REQ_CONFIDENTIALITY | ISC_REQ_REPLAY_DETECT | ISC_REQ_EXTENDED_ERROR;
/*
* from tspkg.dll: 0x00000132
* ISC_REQ_MUTUAL_AUTH
* ISC_REQ_CONFIDENTIALITY
* ISC_REQ_USE_SESSION_KEY
* ISC_REQ_ALLOCATE_MEMORY
*/
fContextReq = ISC_REQ_MUTUAL_AUTH | ISC_REQ_CONFIDENTIALITY | ISC_REQ_USE_SESSION_KEY;
while (true)
{
@ -380,7 +394,7 @@ int credssp_server_authenticate(rdpCredssp* credssp)
INIT_SECURITY_INTERFACE InitSecurityInterface;
PSecurityFunctionTable pSecurityInterface = NULL;
hSSPI = LoadLibrary(_T("security.dll"));
hSSPI = LoadLibrary(_T("secur32.dll"));
#ifdef UNICODE
InitSecurityInterface = (INIT_SECURITY_INTERFACE) GetProcAddress(hSSPI, "InitSecurityInterfaceW");
@ -393,7 +407,7 @@ int credssp_server_authenticate(rdpCredssp* credssp)
credssp->table = InitSecurityInterface();
#endif
status = credssp->table->QuerySecurityPackageInfo(NTLMSP_NAME, &pPackageInfo);
status = credssp->table->QuerySecurityPackageInfo(NLA_PKG_NAME, &pPackageInfo);
if (status != SEC_E_OK)
{
@ -403,7 +417,7 @@ int credssp_server_authenticate(rdpCredssp* credssp)
cbMaxToken = pPackageInfo->cbMaxToken;
status = credssp->table->AcquireCredentialsHandle(NULL, NTLMSP_NAME,
status = credssp->table->AcquireCredentialsHandle(NULL, NLA_PKG_NAME,
SECPKG_CRED_INBOUND, NULL, NULL, NULL, NULL, &credentials, &expiration);
if (status != SEC_E_OK)
@ -419,7 +433,14 @@ int credssp_server_authenticate(rdpCredssp* credssp)
ZeroMemory(&output_buffer, sizeof(SecBuffer));
ZeroMemory(&credssp->ContextSizes, sizeof(SecPkgContext_Sizes));
fContextReq = ASC_REQ_CONFIDENTIALITY | ASC_REQ_INTEGRITY | ASC_REQ_EXTENDED_ERROR;
/*
* from tspkg.dll: 0x00000112
* ASC_REQ_MUTUAL_AUTH
* ASC_REQ_CONFIDENTIALITY
* ASC_REQ_ALLOCATE_MEMORY
*/
fContextReq = ASC_REQ_MUTUAL_AUTH | ASC_REQ_CONFIDENTIALITY;
while (true)
{
@ -572,7 +593,6 @@ int credssp_authenticate(rdpCredssp* credssp)
SECURITY_STATUS credssp_encrypt_public_key_echo(rdpCredssp* credssp)
{
BYTE* p;
SecBuffer Buffers[2];
SecBufferDesc Message;
SECURITY_STATUS status;
@ -580,26 +600,25 @@ SECURITY_STATUS credssp_encrypt_public_key_echo(rdpCredssp* credssp)
Buffers[0].BufferType = SECBUFFER_TOKEN; /* Signature */
Buffers[1].BufferType = SECBUFFER_DATA; /* TLS Public Key */
sspi_SecBufferAlloc(&credssp->pubKeyAuth, credssp->ContextSizes.cbMaxSignature + credssp->PublicKey.cbBuffer);
Buffers[0].cbBuffer = credssp->ContextSizes.cbMaxSignature;
Buffers[0].pvBuffer = malloc(Buffers[0].cbBuffer);
ZeroMemory(Buffers[0].pvBuffer, Buffers[0].cbBuffer);
Buffers[0].pvBuffer = credssp->pubKeyAuth.pvBuffer;
Buffers[1].cbBuffer = credssp->PublicKey.cbBuffer;
Buffers[1].pvBuffer = malloc(Buffers[1].cbBuffer);
Buffers[1].pvBuffer = ((BYTE*) credssp->pubKeyAuth.pvBuffer) + credssp->ContextSizes.cbMaxSignature;
CopyMemory(Buffers[1].pvBuffer, credssp->PublicKey.pvBuffer, Buffers[1].cbBuffer);
if (credssp->server)
{
p = (BYTE*) Buffers[1].pvBuffer;
p[0]++; /* server echos the public key +1 */
/* server echos the public key +1 */
((BYTE*) Buffers[1].pvBuffer)[0]++;
}
Message.cBuffers = 2;
Message.ulVersion = SECBUFFER_VERSION;
Message.pBuffers = (PSecBuffer) &Buffers;
sspi_SecBufferAlloc(&credssp->pubKeyAuth, Buffers[0].cbBuffer + Buffers[1].cbBuffer);
status = credssp->table->EncryptMessage(&credssp->context, 0, &Message, credssp->send_seq_num++);
if (status != SEC_E_OK)
@ -608,12 +627,6 @@ SECURITY_STATUS credssp_encrypt_public_key_echo(rdpCredssp* credssp)
return status;
}
p = (BYTE*) credssp->pubKeyAuth.pvBuffer;
CopyMemory(p, Buffers[0].pvBuffer, Buffers[0].cbBuffer); /* Message Signature */
CopyMemory(&p[Buffers[0].cbBuffer], Buffers[1].pvBuffer, Buffers[1].cbBuffer); /* Encrypted Public Key */
free(Buffers[0].pvBuffer);
free(Buffers[1].pvBuffer);
return status;
}
@ -648,7 +661,7 @@ SECURITY_STATUS credssp_decrypt_public_key_echo(rdpCredssp* credssp)
Message.ulVersion = SECBUFFER_VERSION;
Message.pBuffers = (PSecBuffer) &Buffers;
status = credssp->table->DecryptMessage(&credssp->context, &Message, credssp->recv_seq_num++, &pfQOP);
status = credssp->table->DecryptMessage(&credssp->context, &Message, 0, &pfQOP);
if (status != SEC_E_OK)
{
@ -660,7 +673,10 @@ SECURITY_STATUS credssp_decrypt_public_key_echo(rdpCredssp* credssp)
public_key2 = (BYTE*) Buffers[1].pvBuffer;
if (!credssp->server)
public_key2[0]--; /* server echos the public key +1 */
{
/* server echos the public key +1 */
public_key2[0]--;
}
if (memcmp(public_key1, public_key2, public_key_length) != 0)
{