void credssp_read_ts_credentials(rdpCredssp* credssp, PSecBuffer ts_credentials)
{
wStream* s;
int length;
int ts_password_creds_length;
s = stream_new(0);
stream_attach(s, ts_credentials->pvBuffer, ts_credentials->cbBuffer);
/* TSCredentials (SEQUENCE) */
ber_read_sequence_tag(s, &length);
/* [0] credType (INTEGER) */
ber_read_contextual_tag(s, 0, &length, TRUE);
ber_read_integer(s, NULL);
/* [1] credentials (OCTET STRING) */
ber_read_contextual_tag(s, 1, &length, TRUE);
ber_read_octet_string_tag(s, &ts_password_creds_length);
credssp_read_ts_password_creds(credssp, s);
stream_detach(s);
stream_free(s);
}
static BOOL nla_read_ts_credentials(rdpNla* nla, PSecBuffer ts_credentials)
{
wStream* s;
int length;
int ts_password_creds_length;
BOOL ret;
s = Stream_New(ts_credentials->pvBuffer, ts_credentials->cbBuffer);
if (!s)
{
WLog_ERR(TAG, "Stream_New failed!");
return FALSE;
}
/* TSCredentials (SEQUENCE) */
ret = ber_read_sequence_tag(s, &length) &&
/* [0] credType (INTEGER) */
ber_read_contextual_tag(s, 0, &length, TRUE) &&
ber_read_integer(s, NULL) &&
/* [1] credentials (OCTET STRING) */
ber_read_contextual_tag(s, 1, &length, TRUE) &&
ber_read_octet_string_tag(s, &ts_password_creds_length) &&
nla_read_ts_password_creds(nla, s);
Stream_Free(s, FALSE);
return ret;
}
void credssp_read_ts_password_creds(rdpCredssp* credssp, STREAM* s)
{
int length;
/* TSPasswordCreds (SEQUENCE) */
ber_read_sequence_tag(s, &length);
/* [0] domainName (OCTET STRING) */
ber_read_contextual_tag(s, 0, &length, true);
ber_read_octet_string_tag(s, &length);
credssp->identity.DomainLength = (UINT32) length;
credssp->identity.Domain = (UINT16*) malloc(length);
CopyMemory(credssp->identity.Domain, s->p, credssp->identity.DomainLength);
stream_seek(s, credssp->identity.DomainLength);
credssp->identity.DomainLength /= 2;
/* [1] userName (OCTET STRING) */
ber_read_contextual_tag(s, 1, &length, true);
ber_read_octet_string_tag(s, &length);
credssp->identity.UserLength = (UINT32) length;
credssp->identity.User = (UINT16*) malloc(length);
CopyMemory(credssp->identity.User, s->p, credssp->identity.UserLength);
stream_seek(s, credssp->identity.UserLength);
credssp->identity.UserLength /= 2;
/* [2] password (OCTET STRING) */
ber_read_contextual_tag(s, 2, &length, true);
ber_read_octet_string_tag(s, &length);
credssp->identity.PasswordLength = (UINT32) length;
credssp->identity.Password = (UINT16*) malloc(length);
CopyMemory(credssp->identity.Password, s->p, credssp->identity.PasswordLength);
stream_seek(s, credssp->identity.PasswordLength);
credssp->identity.PasswordLength /= 2;
}
int credssp_recv(rdpCredssp* credssp)
{
STREAM* s;
int length;
int status;
uint32 version;
s = stream_new(2048);
status = tls_read(credssp->tls, s->data, stream_get_left(s));
if (status < 0)
return -1;
/* TSRequest */
ber_read_sequence_tag(s, &length);
ber_read_contextual_tag(s, 0, &length, true);
ber_read_integer(s, &version);
/* [1] negoTokens (NegoData) */
if (ber_read_contextual_tag(s, 1, &length, true) != false)
{
ber_read_sequence_tag(s, &length); /* SEQUENCE OF NegoDataItem */
ber_read_sequence_tag(s, &length); /* NegoDataItem */
ber_read_contextual_tag(s, 0, &length, true); /* [0] negoToken */
ber_read_octet_string(s, &length); /* OCTET STRING */
sspi_SecBufferAlloc(&credssp->negoToken, length);
stream_read(s, credssp->negoToken.pvBuffer, length);
credssp->negoToken.cbBuffer = length;
}
/* [2] authInfo (OCTET STRING) */
if (ber_read_contextual_tag(s, 2, &length, true) != false)
{
ber_read_octet_string(s, &length); /* OCTET STRING */
sspi_SecBufferAlloc(&credssp->authInfo, length);
stream_read(s, credssp->authInfo.pvBuffer, length);
credssp->authInfo.cbBuffer = length;
}
/* [3] pubKeyAuth (OCTET STRING) */
if (ber_read_contextual_tag(s, 3, &length, true) != false)
{
ber_read_octet_string(s, &length); /* OCTET STRING */
sspi_SecBufferAlloc(&credssp->pubKeyAuth, length);
stream_read(s, credssp->pubKeyAuth.pvBuffer, length);
credssp->pubKeyAuth.cbBuffer = length;
}
stream_free(s);
return 0;
}
int credssp_recv(rdpCredssp* credssp, rdpBlob* negoToken, rdpBlob* authInfo, rdpBlob* pubKeyAuth)
{
STREAM* s;
int length;
int status;
uint32 version;
s = transport_recv_stream_init(credssp->transport, 2048);
status = transport_read(credssp->transport, s);
if (status < 0)
return -1;
/* TSRequest */
ber_read_sequence_tag(s, &length);
ber_read_contextual_tag(s, 0, &length, True);
ber_read_integer(s, &version);
/* [1] negoTokens (NegoData) */
if (ber_read_contextual_tag(s, 1, &length, True) != False)
{
ber_read_sequence_tag(s, &length); /* SEQUENCE OF NegoDataItem */
ber_read_sequence_tag(s, &length); /* NegoDataItem */
ber_read_contextual_tag(s, 0, &length, True); /* [0] negoToken */
ber_read_octet_string(s, &length); /* OCTET STRING */
freerdp_blob_alloc(negoToken, length);
stream_read(s, negoToken->data, length);
}
/* [2] authInfo (OCTET STRING) */
if (ber_read_contextual_tag(s, 2, &length, True) != False)
{
ber_read_octet_string(s, &length); /* OCTET STRING */
freerdp_blob_alloc(authInfo, length);
stream_read(s, authInfo->data, length);
}
/* [3] pubKeyAuth (OCTET STRING) */
if (ber_read_contextual_tag(s, 3, &length, True) != False)
{
ber_read_octet_string(s, &length); /* OCTET STRING */
freerdp_blob_alloc(pubKeyAuth, length);
stream_read(s, pubKeyAuth->data, length);
}
return 0;
}
void credssp_read_ts_password_creds(rdpCredssp* credssp, wStream* s)
{
int length;
/* TSPasswordCreds (SEQUENCE) */
ber_read_sequence_tag(s, &length);
/* [0] domainName (OCTET STRING) */
ber_read_contextual_tag(s, 0, &length, TRUE);
ber_read_octet_string_tag(s, &length);
credssp->identity.DomainLength = (UINT32) length;
credssp->identity.Domain = (UINT16*) malloc(length);
CopyMemory(credssp->identity.Domain, Stream_Pointer(s), credssp->identity.DomainLength);
Stream_Seek(s, credssp->identity.DomainLength);
credssp->identity.DomainLength /= 2;
/* [1] userName (OCTET STRING) */
ber_read_contextual_tag(s, 1, &length, TRUE);
ber_read_octet_string_tag(s, &length);
credssp->identity.UserLength = (UINT32) length;
credssp->identity.User = (UINT16*) malloc(length);
CopyMemory(credssp->identity.User, Stream_Pointer(s), credssp->identity.UserLength);
Stream_Seek(s, credssp->identity.UserLength);
credssp->identity.UserLength /= 2;
/* [2] password (OCTET STRING) */
ber_read_contextual_tag(s, 2, &length, TRUE);
ber_read_octet_string_tag(s, &length);
credssp->identity.PasswordLength = (UINT32) length;
credssp->identity.Password = (UINT16*) malloc(length);
CopyMemory(credssp->identity.Password, Stream_Pointer(s), credssp->identity.PasswordLength);
Stream_Seek(s, credssp->identity.PasswordLength);
credssp->identity.PasswordLength /= 2;
credssp->identity.Flags = SEC_WINNT_AUTH_IDENTITY_UNICODE;
}
BOOL certificate_read_x509_certificate(rdpCertBlob* cert, rdpCertInfo* info)
{
wStream* s;
int length;
BYTE padding;
UINT32 version;
int modulus_length;
int exponent_length;
int error = 0;
if (!cert || !info)
return FALSE;
memset(info, 0, sizeof(rdpCertInfo));
s = Stream_New(cert->data, cert->length);
if (!s)
return FALSE;
info->Modulus = 0;
if (!ber_read_sequence_tag(s, &length)) /* Certificate (SEQUENCE) */
goto error1;
error++;
if (!ber_read_sequence_tag(s, &length)) /* TBSCertificate (SEQUENCE) */
goto error1;
error++;
if (!ber_read_contextual_tag(s, 0, &length, TRUE)) /* Explicit Contextual Tag [0] */
goto error1;
error++;
if (!ber_read_integer(s, &version)) /* version (INTEGER) */
goto error1;
error++;
version++;
/* serialNumber */
if (!ber_read_integer(s, NULL)) /* CertificateSerialNumber (INTEGER) */
goto error1;
error++;
/* signature */
if (!ber_read_sequence_tag(s, &length) ||
!Stream_SafeSeek(s, length)) /* AlgorithmIdentifier (SEQUENCE) */
goto error1;
error++;
/* issuer */
if (!ber_read_sequence_tag(s, &length) || !Stream_SafeSeek(s, length)) /* Name (SEQUENCE) */
goto error1;
error++;
/* validity */
if (!ber_read_sequence_tag(s, &length) || !Stream_SafeSeek(s, length)) /* Validity (SEQUENCE) */
goto error1;
error++;
/* subject */
if (!ber_read_sequence_tag(s, &length) || !Stream_SafeSeek(s, length)) /* Name (SEQUENCE) */
goto error1;
error++;
/* subjectPublicKeyInfo */
if (!ber_read_sequence_tag(s, &length)) /* SubjectPublicKeyInfo (SEQUENCE) */
goto error1;
error++;
/* subjectPublicKeyInfo::AlgorithmIdentifier */
if (!ber_read_sequence_tag(s, &length) ||
!Stream_SafeSeek(s, length)) /* AlgorithmIdentifier (SEQUENCE) */
goto error1;
error++;
/* subjectPublicKeyInfo::subjectPublicKey */
if (!ber_read_bit_string(s, &length, &padding)) /* BIT_STRING */
goto error1;
error++;
/* RSAPublicKey (SEQUENCE) */
if (!ber_read_sequence_tag(s, &length)) /* SEQUENCE */
goto error1;
error++;
if (!ber_read_integer_length(s, &modulus_length)) /* modulus (INTEGER) */
goto error1;
error++;
/* skip zero padding, if any */
do
{
if (Stream_GetRemainingLength(s) < 1)
goto error1;
Stream_Peek_UINT8(s, padding);
if (padding == 0)
{
if (!Stream_SafeSeek(s, 1))
goto error1;
modulus_length--;
}
}
while (padding == 0);
error++;
if (((int) Stream_GetRemainingLength(s)) < modulus_length)
goto error1;
info->ModulusLength = modulus_length;
info->Modulus = (BYTE*) malloc(info->ModulusLength);
if (!info->Modulus)
goto error1;
Stream_Read(s, info->Modulus, info->ModulusLength);
error++;
if (!ber_read_integer_length(s, &exponent_length)) /* publicExponent (INTEGER) */
goto error2;
error++;
if ((((int) Stream_GetRemainingLength(s)) < exponent_length) || (exponent_length > 4))
goto error2;
Stream_Read(s, &info->exponent[4 - exponent_length], exponent_length);
crypto_reverse(info->Modulus, info->ModulusLength);
crypto_reverse(info->exponent, 4);
Stream_Free(s, FALSE);
return TRUE;
error2:
free(info->Modulus);
info->Modulus = 0;
error1:
WLog_ERR(TAG, "error reading when reading certificate: part=%s error=%d",
certificate_read_errors[error], error);
Stream_Free(s, FALSE);
return FALSE;
}
int nla_decode_ts_request(rdpNla* nla, wStream* s)
{
int length;
/* TSRequest */
if (!ber_read_sequence_tag(s, &length) ||
!ber_read_contextual_tag(s, 0, &length, TRUE) ||
!ber_read_integer(s, &nla->version))
{
return -1;
}
/* [1] negoTokens (NegoData) */
if (ber_read_contextual_tag(s, 1, &length, TRUE) != FALSE)
{
if (!ber_read_sequence_tag(s, &length) || /* SEQUENCE OF NegoDataItem */
!ber_read_sequence_tag(s, &length) || /* NegoDataItem */
!ber_read_contextual_tag(s, 0, &length, TRUE) || /* [0] negoToken */
!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
((int) Stream_GetRemainingLength(s)) < length)
{
return -1;
}
if (!sspi_SecBufferAlloc(&nla->negoToken, length))
return -1;
Stream_Read(s, nla->negoToken.pvBuffer, length);
nla->negoToken.cbBuffer = length;
}
/* [2] authInfo (OCTET STRING) */
if (ber_read_contextual_tag(s, 2, &length, TRUE) != FALSE)
{
if (!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
((int) Stream_GetRemainingLength(s)) < length)
return -1;
if (!sspi_SecBufferAlloc(&nla->authInfo, length))
return -1;
Stream_Read(s, nla->authInfo.pvBuffer, length);
nla->authInfo.cbBuffer = length;
}
/* [3] pubKeyAuth (OCTET STRING) */
if (ber_read_contextual_tag(s, 3, &length, TRUE) != FALSE)
{
if (!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
((int) Stream_GetRemainingLength(s)) < length)
return -1;
if (!sspi_SecBufferAlloc(&nla->pubKeyAuth, length))
return -1;
Stream_Read(s, nla->pubKeyAuth.pvBuffer, length);
nla->pubKeyAuth.cbBuffer = length;
}
/* [4] errorCode (INTEGER) */
if (nla->version >= 3)
{
if (ber_read_contextual_tag(s, 4, &length, TRUE) != FALSE)
{
if (!ber_read_integer(s, &nla->errorCode))
return -1;
}
}
return 1;
}
BOOL nla_read_ts_password_creds(rdpNla* nla, wStream* s)
{
int length;
if (!nla->identity)
{
WLog_ERR(TAG, "nla->identity is NULL!");
return FALSE;
}
/* TSPasswordCreds (SEQUENCE)
* Initialise to default values. */
nla->identity->Flags = SEC_WINNT_AUTH_IDENTITY_UNICODE;
nla->identity->UserLength = (UINT32) 0;
nla->identity->User = NULL;
nla->identity->DomainLength = (UINT32) 0;
nla->identity->Domain = NULL;
nla->identity->Password = NULL;
nla->identity->PasswordLength = (UINT32) 0;
if (!ber_read_sequence_tag(s, &length))
return FALSE;
/* The sequence is empty, return early,
* TSPasswordCreds (SEQUENCE) is optional. */
if (length == 0)
return TRUE;
/* [0] domainName (OCTET STRING) */
if (!ber_read_contextual_tag(s, 0, &length, TRUE) ||
!ber_read_octet_string_tag(s, &length))
{
return FALSE;
}
nla->identity->DomainLength = (UINT32) length;
if (nla->identity->DomainLength > 0)
{
nla->identity->Domain = (UINT16*) malloc(length);
if (!nla->identity->Domain)
return FALSE;
CopyMemory(nla->identity->Domain, Stream_Pointer(s), nla->identity->DomainLength);
Stream_Seek(s, nla->identity->DomainLength);
nla->identity->DomainLength /= 2;
}
/* [1] userName (OCTET STRING) */
if (!ber_read_contextual_tag(s, 1, &length, TRUE) ||
!ber_read_octet_string_tag(s, &length))
{
return FALSE;
}
nla->identity->UserLength = (UINT32) length;
if (nla->identity->UserLength > 0)
{
nla->identity->User = (UINT16 *) malloc(length);
if (!nla->identity->User)
return FALSE;
CopyMemory(nla->identity->User, Stream_Pointer(s), nla->identity->UserLength);
Stream_Seek(s, nla->identity->UserLength);
nla->identity->UserLength /= 2;
}
/* [2] password (OCTET STRING) */
if (!ber_read_contextual_tag(s, 2, &length, TRUE) ||
!ber_read_octet_string_tag(s, &length))
{
return FALSE;
}
nla->identity->PasswordLength = (UINT32) length;
if (nla->identity->PasswordLength > 0)
{
nla->identity->Password = (UINT16 *) malloc(length);
if (!nla->identity->Password)
return FALSE;
CopyMemory(nla->identity->Password, Stream_Pointer(s), nla->identity->PasswordLength);
Stream_Seek(s, nla->identity->PasswordLength);
nla->identity->PasswordLength /= 2;
}
return TRUE;
}
void certificate_read_x509_certificate(rdpCertBlob* cert, rdpCertInfo* info)
{
STREAM* s;
int length;
uint8 padding;
uint32 version;
int modulus_length;
int exponent_length;
s = stream_new(0);
s->p = s->data = cert->data;
ber_read_sequence_tag(s, &length); /* Certificate (SEQUENCE) */
ber_read_sequence_tag(s, &length); /* TBSCertificate (SEQUENCE) */
/* Explicit Contextual Tag [0] */
ber_read_contextual_tag(s, 0, &length, true);
ber_read_integer(s, &version); /* version (INTEGER) */
version++;
/* serialNumber */
ber_read_integer(s, NULL); /* CertificateSerialNumber (INTEGER) */
/* signature */
ber_read_sequence_tag(s, &length); /* AlgorithmIdentifier (SEQUENCE) */
stream_seek(s, length);
/* issuer */
ber_read_sequence_tag(s, &length); /* Name (SEQUENCE) */
stream_seek(s, length);
/* validity */
ber_read_sequence_tag(s, &length); /* Validity (SEQUENCE) */
stream_seek(s, length);
/* subject */
ber_read_sequence_tag(s, &length); /* Name (SEQUENCE) */
stream_seek(s, length);
/* subjectPublicKeyInfo */
ber_read_sequence_tag(s, &length); /* SubjectPublicKeyInfo (SEQUENCE) */
/* subjectPublicKeyInfo::AlgorithmIdentifier */
ber_read_sequence_tag(s, &length); /* AlgorithmIdentifier (SEQUENCE) */
stream_seek(s, length);
/* subjectPublicKeyInfo::subjectPublicKey */
ber_read_bit_string(s, &length, &padding); /* BIT_STRING */
/* RSAPublicKey (SEQUENCE) */
ber_read_sequence_tag(s, &length); /* SEQUENCE */
ber_read_integer_length(s, &modulus_length); /* modulus (INTEGER) */
/* skip zero padding, if any */
do
{
stream_peek_uint8(s, padding);
if (padding == 0)
{
stream_seek(s, 1);
modulus_length--;
}
}
while (padding == 0);
freerdp_blob_alloc(&info->modulus, modulus_length);
stream_read(s, info->modulus.data, modulus_length);
ber_read_integer_length(s, &exponent_length); /* publicExponent (INTEGER) */
stream_read(s, &info->exponent[4 - exponent_length], exponent_length);
crypto_reverse(info->modulus.data, modulus_length);
crypto_reverse(info->exponent, 4);
}
BOOL certificate_read_x509_certificate(rdpCertBlob* cert, rdpCertInfo* info)
{
wStream* s;
int length;
BYTE padding;
UINT32 version;
int modulus_length;
int exponent_length;
int error = 0;
s = stream_new(0);
stream_attach(s, cert->data, cert->length);
info->Modulus = 0;
if(!ber_read_sequence_tag(s, &length)) /* Certificate (SEQUENCE) */
goto error1;
error++;
if(!ber_read_sequence_tag(s, &length)) /* TBSCertificate (SEQUENCE) */
goto error1;
error++;
if(!ber_read_contextual_tag(s, 0, &length, TRUE)) /* Explicit Contextual Tag [0] */
goto error1;
error++;
if(!ber_read_integer(s, &version)) /* version (INTEGER) */
goto error1;
error++;
version++;
/* serialNumber */
if(!ber_read_integer(s, NULL)) /* CertificateSerialNumber (INTEGER) */
goto error1;
error++;
/* signature */
if(!ber_read_sequence_tag(s, &length) || !stream_skip(s, length)) /* AlgorithmIdentifier (SEQUENCE) */
goto error1;
error++;
/* issuer */
if(!ber_read_sequence_tag(s, &length) || !stream_skip(s, length)) /* Name (SEQUENCE) */
goto error1;
error++;
/* validity */
if(!ber_read_sequence_tag(s, &length) || !stream_skip(s, length)) /* Validity (SEQUENCE) */
goto error1;
error++;
/* subject */
if(!ber_read_sequence_tag(s, &length) || !stream_skip(s, length)) /* Name (SEQUENCE) */
goto error1;
error++;
/* subjectPublicKeyInfo */
if(!ber_read_sequence_tag(s, &length)) /* SubjectPublicKeyInfo (SEQUENCE) */
goto error1;
error++;
/* subjectPublicKeyInfo::AlgorithmIdentifier */
if(!ber_read_sequence_tag(s, &length) || !stream_skip(s, length)) /* AlgorithmIdentifier (SEQUENCE) */
goto error1;
error++;
/* subjectPublicKeyInfo::subjectPublicKey */
if(!ber_read_bit_string(s, &length, &padding)) /* BIT_STRING */
goto error1;
error++;
/* RSAPublicKey (SEQUENCE) */
if(!ber_read_sequence_tag(s, &length)) /* SEQUENCE */
goto error1;
error++;
if(!ber_read_integer_length(s, &modulus_length)) /* modulus (INTEGER) */
goto error1;
error++;
/* skip zero padding, if any */
do
{
if(stream_get_left(s) < 1)
goto error1;
stream_peek_BYTE(s, padding);
if (padding == 0)
{
if(!stream_skip(s, 1))
goto error1;
modulus_length--;
}
}
while (padding == 0);
error++;
if(stream_get_left(s) < modulus_length)
goto error1;
info->ModulusLength = modulus_length;
info->Modulus = (BYTE*) malloc(info->ModulusLength);
stream_read(s, info->Modulus, info->ModulusLength);
error++;
if(!ber_read_integer_length(s, &exponent_length)) /* publicExponent (INTEGER) */
goto error2;
error++;
if(stream_get_left(s) < exponent_length || exponent_length > 4)
goto error2;
stream_read(s, &info->exponent[4 - exponent_length], exponent_length);
crypto_reverse(info->Modulus, info->ModulusLength);
crypto_reverse(info->exponent, 4);
stream_detach(s);
stream_free(s);
return TRUE;
error2:
free(info->Modulus);
info->Modulus = 0;
error1:
fprintf(stderr, "error reading when reading certificate: part=%s error=%d\n", certificate_read_errors[error], error);
stream_detach(s);
stream_free(s);
return FALSE;
}
int credssp_recv(rdpCredssp* credssp)
{
wStream* s;
int length;
int status;
UINT32 version;
s = Stream_New(NULL, 4096);
status = transport_read(credssp->transport, s);
Stream_Length(s) = status;
if (status < 0)
{
fprintf(stderr, "credssp_recv() error: %d\n", status);
Stream_Free(s, TRUE);
return -1;
}
/* TSRequest */
if(!ber_read_sequence_tag(s, &length) ||
!ber_read_contextual_tag(s, 0, &length, TRUE) ||
!ber_read_integer(s, &version))
{
Stream_Free(s, TRUE);
return -1;
}
/* [1] negoTokens (NegoData) */
if (ber_read_contextual_tag(s, 1, &length, TRUE) != FALSE)
{
if (!ber_read_sequence_tag(s, &length) || /* SEQUENCE OF NegoDataItem */
!ber_read_sequence_tag(s, &length) || /* NegoDataItem */
!ber_read_contextual_tag(s, 0, &length, TRUE) || /* [0] negoToken */
!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
Stream_GetRemainingLength(s) < length)
{
Stream_Free(s, TRUE);
return -1;
}
sspi_SecBufferAlloc(&credssp->negoToken, length);
Stream_Read(s, credssp->negoToken.pvBuffer, length);
credssp->negoToken.cbBuffer = length;
}
/* [2] authInfo (OCTET STRING) */
if (ber_read_contextual_tag(s, 2, &length, TRUE) != FALSE)
{
if(!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
Stream_GetRemainingLength(s) < length)
{
Stream_Free(s, TRUE);
return -1;
}
sspi_SecBufferAlloc(&credssp->authInfo, length);
Stream_Read(s, credssp->authInfo.pvBuffer, length);
credssp->authInfo.cbBuffer = length;
}
/* [3] pubKeyAuth (OCTET STRING) */
if (ber_read_contextual_tag(s, 3, &length, TRUE) != FALSE)
{
if(!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
Stream_GetRemainingLength(s) < length)
{
Stream_Free(s, TRUE);
return -1;
}
sspi_SecBufferAlloc(&credssp->pubKeyAuth, length);
Stream_Read(s, credssp->pubKeyAuth.pvBuffer, length);
credssp->pubKeyAuth.cbBuffer = length;
}
Stream_Free(s, TRUE);
return 0;
}
int credssp_recv(rdpCredssp* credssp)
{
STREAM* s;
int length;
int status;
UINT32 version;
s = stream_new(4096);
status = transport_read(credssp->transport, s);
s->size = status;
if (status < 0)
{
printf("credssp_recv() error: %d\n", status);
stream_free(s);
return -1;
}
/* TSRequest */
if(!ber_read_sequence_tag(s, &length) ||
!ber_read_contextual_tag(s, 0, &length, TRUE) ||
!ber_read_integer(s, &version))
return -1;
/* [1] negoTokens (NegoData) */
if (ber_read_contextual_tag(s, 1, &length, TRUE) != FALSE)
{
if (!ber_read_sequence_tag(s, &length) || /* SEQUENCE OF NegoDataItem */
!ber_read_sequence_tag(s, &length) || /* NegoDataItem */
!ber_read_contextual_tag(s, 0, &length, TRUE) || /* [0] negoToken */
!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
stream_get_left(s) < length)
return -1;
sspi_SecBufferAlloc(&credssp->negoToken, length);
stream_read(s, credssp->negoToken.pvBuffer, length);
credssp->negoToken.cbBuffer = length;
}
/* [2] authInfo (OCTET STRING) */
if (ber_read_contextual_tag(s, 2, &length, TRUE) != FALSE)
{
if(!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
stream_get_left(s) < length)
return -1;
sspi_SecBufferAlloc(&credssp->authInfo, length);
stream_read(s, credssp->authInfo.pvBuffer, length);
credssp->authInfo.cbBuffer = length;
}
/* [3] pubKeyAuth (OCTET STRING) */
if (ber_read_contextual_tag(s, 3, &length, TRUE) != FALSE)
{
if(!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
stream_get_left(s) < length)
return -1;
sspi_SecBufferAlloc(&credssp->pubKeyAuth, length);
stream_read(s, credssp->pubKeyAuth.pvBuffer, length);
credssp->pubKeyAuth.cbBuffer = length;
}
stream_free(s);
return 0;
}
int credssp_recv(rdpCredssp* credssp)
{
STREAM* s;
int length;
int status;
UINT32 version;
s = stream_new(4096);
status = tls_read_all(credssp->tls, s->p, stream_get_left(s));
s->size = status;
if (status < 0)
{
printf("credssp_recv() error: %d\n", status);
stream_free(s);
return -1;
}
//printf("Receiving TSRequest: (%d)\n", s->size);
//freerdp_hexdump(s->data, s->size);
/* TSRequest */
ber_read_sequence_tag(s, &length);
ber_read_contextual_tag(s, 0, &length, true);
ber_read_integer(s, &version);
/* [1] negoTokens (NegoData) */
if (ber_read_contextual_tag(s, 1, &length, true) != false)
{
ber_read_sequence_tag(s, &length); /* SEQUENCE OF NegoDataItem */
ber_read_sequence_tag(s, &length); /* NegoDataItem */
ber_read_contextual_tag(s, 0, &length, true); /* [0] negoToken */
ber_read_octet_string_tag(s, &length); /* OCTET STRING */
sspi_SecBufferAlloc(&credssp->negoToken, length);
stream_read(s, credssp->negoToken.pvBuffer, length);
credssp->negoToken.cbBuffer = length;
}
/* [2] authInfo (OCTET STRING) */
if (ber_read_contextual_tag(s, 2, &length, true) != false)
{
ber_read_octet_string_tag(s, &length); /* OCTET STRING */
sspi_SecBufferAlloc(&credssp->authInfo, length);
stream_read(s, credssp->authInfo.pvBuffer, length);
credssp->authInfo.cbBuffer = length;
}
/* [3] pubKeyAuth (OCTET STRING) */
if (ber_read_contextual_tag(s, 3, &length, true) != false)
{
ber_read_octet_string_tag(s, &length); /* OCTET STRING */
sspi_SecBufferAlloc(&credssp->pubKeyAuth, length);
stream_read(s, credssp->pubKeyAuth.pvBuffer, length);
credssp->pubKeyAuth.cbBuffer = length;
}
stream_free(s);
return 0;
}
