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secur32: Implement schannel DecryptMessage().

This commit is contained in:
Henri Verbeet 2008-12-28 22:21:36 +01:00 committed by Alexandre Julliard
parent 3954c4ec65
commit e4505389ad
1 changed files with 84 additions and 2 deletions
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86
dlls/secur32/schannel.c
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@ -61,6 +61,7 @@ MAKE_FUNCPTR(gnutls_mac_get);
MAKE_FUNCPTR(gnutls_mac_get_key_size);
MAKE_FUNCPTR(gnutls_perror);
MAKE_FUNCPTR(gnutls_set_default_priority);
MAKE_FUNCPTR(gnutls_record_recv);
MAKE_FUNCPTR(gnutls_record_send);
MAKE_FUNCPTR(gnutls_transport_set_errno);
MAKE_FUNCPTR(gnutls_transport_set_ptr);
@ -1002,6 +1003,86 @@ static SECURITY_STATUS SEC_ENTRY schan_EncryptMessage(PCtxtHandle context_handle
return SEC_E_OK;
}
static int schan_decrypt_message_get_next_buffer(const struct schan_transport *t, struct schan_buffers *s)
{
if (s->current_buffer_idx == -1)
return schan_find_sec_buffer_idx(s->desc, 0, SECBUFFER_DATA);
return -1;
}
static SECURITY_STATUS SEC_ENTRY schan_DecryptMessage(PCtxtHandle context_handle,
PSecBufferDesc message, ULONG message_seq_no, PULONG quality)
{
struct schan_transport transport;
struct schan_context *ctx;
SecBuffer *buffer;
SIZE_T data_size;
char *data;
ssize_t received = 0;
ssize_t ret;
int idx;
TRACE("context_handle %p, message %p, message_seq_no %d, quality %p\n",
context_handle, message, message_seq_no, quality);
if (!context_handle) return SEC_E_INVALID_HANDLE;
ctx = schan_get_object(context_handle->dwLower, SCHAN_HANDLE_CTX);
dump_buffer_desc(message);
idx = schan_find_sec_buffer_idx(message, 0, SECBUFFER_DATA);
if (idx == -1)
{
WARN("No data buffer passed\n");
return SEC_E_INTERNAL_ERROR;
}
buffer = &message->pBuffers[idx];
data_size = buffer->cbBuffer;
data = HeapAlloc(GetProcessHeap(), 0, data_size);
transport.ctx = ctx;
init_schan_buffers(&transport.in, message, schan_decrypt_message_get_next_buffer);
init_schan_buffers(&transport.out, NULL, NULL);
pgnutls_transport_set_ptr(ctx->session, (gnutls_transport_ptr_t)&transport);
while (received < data_size)
{
ret = pgnutls_record_recv(ctx->session, data + received, data_size - received);
if (ret < 0)
{
if (ret == GNUTLS_E_AGAIN)
{
if (!received)
{
pgnutls_perror(ret);
HeapFree(GetProcessHeap(), 0, data);
TRACE("Returning SEC_E_INCOMPLETE_MESSAGE\n");
return SEC_E_INCOMPLETE_MESSAGE;
}
break;
}
else
{
pgnutls_perror(ret);
HeapFree(GetProcessHeap(), 0, data);
ERR("Returning SEC_E_INTERNAL_ERROR\n");
return SEC_E_INTERNAL_ERROR;
}
}
received += ret;
}
TRACE("Received %zd bytes\n", received);
memcpy(buffer->pvBuffer, data, received);
buffer->cbBuffer = received;
HeapFree(GetProcessHeap(), 0, data);
return SEC_E_OK;
}
static SECURITY_STATUS SEC_ENTRY schan_DeleteSecurityContext(PCtxtHandle context_handle)
{
struct schan_context *ctx;
@ -1051,7 +1132,7 @@ static const SecurityFunctionTableA schanTableA = {
NULL, /* Reserved8 */
NULL, /* QuerySecurityContextToken */
schan_EncryptMessage,
NULL, /* DecryptMessage */
schan_DecryptMessage,
NULL, /* SetContextAttributesA */
};
@ -1082,7 +1163,7 @@ static const SecurityFunctionTableW schanTableW = {
NULL, /* Reserved8 */
NULL, /* QuerySecurityContextToken */
schan_EncryptMessage,
NULL, /* DecryptMessage */
schan_DecryptMessage,
NULL, /* SetContextAttributesW */
};
@ -1148,6 +1229,7 @@ void SECUR32_initSchannelSP(void)
LOAD_FUNCPTR(gnutls_mac_get_key_size)
LOAD_FUNCPTR(gnutls_perror)
LOAD_FUNCPTR(gnutls_set_default_priority)
LOAD_FUNCPTR(gnutls_record_recv);
LOAD_FUNCPTR(gnutls_record_send);
LOAD_FUNCPTR(gnutls_transport_set_errno)
LOAD_FUNCPTR(gnutls_transport_set_ptr)