--- /dev/null
+/** @file
+ The Miscellaneous Routines for TlsDxe driver.
+
+Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "TlsImpl.h"
+
+/**
+ Encrypt the message listed in fragment.
+
+ @param[in] TlsInstance The pointer to the TLS instance.
+ @param[in, out] FragmentTable Pointer to a list of fragment.
+ On input these fragments contain the TLS header and
+ plain text TLS payload;
+ On output these fragments contain the TLS header and
+ cipher text TLS payload.
+ @param[in] FragmentCount Number of fragment.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+ @retval EFI_OUT_OF_RESOURCES Can't allocate memory resources.
+ @retval EFI_ABORTED TLS session state is incorrect.
+ @retval Others Other errors as indicated.
+**/
+EFI_STATUS
+TlsEncryptPacket (
+ IN TLS_INSTANCE *TlsInstance,
+ IN OUT EFI_TLS_FRAGMENT_DATA **FragmentTable,
+ IN UINT32 *FragmentCount
+ )
+{
+ EFI_STATUS Status;
+ UINTN Index;
+ UINT32 BytesCopied;
+ UINT32 BufferInSize;
+ UINT8 *BufferIn;
+ UINT8 *BufferInPtr;
+ TLS_RECORD_HEADER *RecordHeaderIn;
+ UINT16 ThisPlainMessageSize;
+ TLS_RECORD_HEADER *TempRecordHeader;
+ UINT16 ThisMessageSize;
+ UINT32 BufferOutSize;
+ UINT8 *BufferOut;
+ INTN Ret;
+
+ Status = EFI_SUCCESS;
+ BytesCopied = 0;
+ BufferInSize = 0;
+ BufferIn = NULL;
+ BufferInPtr = NULL;
+ RecordHeaderIn = NULL;
+ TempRecordHeader = NULL;
+ BufferOutSize = 0;
+ BufferOut = NULL;
+ Ret = 0;
+
+ //
+ // Calculate the size according to the fragment table.
+ //
+ for (Index = 0; Index < *FragmentCount; Index++) {
+ BufferInSize += (*FragmentTable)[Index].FragmentLength;
+ }
+
+ //
+ // Allocate buffer for processing data.
+ //
+ BufferIn = AllocateZeroPool (BufferInSize);
+ if (BufferIn == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto ERROR;
+ }
+
+ //
+ // Copy all TLS plain record header and payload into BufferIn.
+ //
+ for (Index = 0; Index < *FragmentCount; Index++) {
+ CopyMem (
+ (BufferIn + BytesCopied),
+ (*FragmentTable)[Index].FragmentBuffer,
+ (*FragmentTable)[Index].FragmentLength
+ );
+ BytesCopied += (*FragmentTable)[Index].FragmentLength;
+ }
+
+ BufferOut = AllocateZeroPool (MAX_BUFFER_SIZE);
+ if (BufferOut == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto ERROR;
+ }
+
+ //
+ // Parsing buffer.
+ //
+ BufferInPtr = BufferIn;
+ TempRecordHeader = (TLS_RECORD_HEADER *) BufferOut;
+ while ((UINTN) BufferInPtr < (UINTN) BufferIn + BufferInSize) {
+ RecordHeaderIn = (TLS_RECORD_HEADER *) BufferInPtr;
+
+ if (RecordHeaderIn->ContentType != TLS_CONTENT_TYPE_APPLICATION_DATA) {
+ Status = EFI_INVALID_PARAMETER;
+ goto ERROR;
+ }
+
+ ThisPlainMessageSize = RecordHeaderIn->Length;
+
+ TlsWrite (TlsInstance->TlsConn, (UINT8 *) (RecordHeaderIn + 1), ThisPlainMessageSize);
+
+ Ret = TlsCtrlTrafficOut (TlsInstance->TlsConn, (UINT8 *)(TempRecordHeader), MAX_BUFFER_SIZE - BufferOutSize);
+
+ if (Ret > 0) {
+ ThisMessageSize = (UINT16) Ret;
+ } else {
+ //
+ // No data was successfully encrypted, continue to encrypt other messages.
+ //
+ DEBUG ((EFI_D_WARN, "TlsEncryptPacket: No data read from TLS object.\n"));
+
+ ThisMessageSize = 0;
+ }
+
+ BufferOutSize += ThisMessageSize;
+
+ BufferInPtr += RECORD_HEADER_LEN + ThisPlainMessageSize;
+ TempRecordHeader += ThisMessageSize;
+ }
+
+ FreePool (BufferIn);
+ BufferIn = NULL;
+
+ //
+ // The caller will be responsible to handle the original fragment table.
+ //
+ *FragmentTable = AllocateZeroPool (sizeof (EFI_TLS_FRAGMENT_DATA));
+ if (*FragmentTable == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto ERROR;
+ }
+
+ (*FragmentTable)[0].FragmentBuffer = BufferOut;
+ (*FragmentTable)[0].FragmentLength = BufferOutSize;
+ *FragmentCount = 1;
+
+ return Status;
+
+ERROR:
+
+ if (BufferIn != NULL) {
+ FreePool (BufferIn);
+ BufferIn = NULL;
+ }
+
+ if (BufferOut != NULL) {
+ FreePool (BufferOut);
+ BufferOut = NULL;
+ }
+
+ return Status;
+}
+
+/**
+ Decrypt the message listed in fragment.
+
+ @param[in] TlsInstance The pointer to the TLS instance.
+ @param[in, out] FragmentTable Pointer to a list of fragment.
+ On input these fragments contain the TLS header and
+ cipher text TLS payload;
+ On output these fragments contain the TLS header and
+ plain text TLS payload.
+ @param[in] FragmentCount Number of fragment.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+ @retval EFI_OUT_OF_RESOURCES Can't allocate memory resources.
+ @retval EFI_ABORTED TLS session state is incorrect.
+ @retval Others Other errors as indicated.
+**/
+EFI_STATUS
+TlsDecryptPacket (
+ IN TLS_INSTANCE *TlsInstance,
+ IN OUT EFI_TLS_FRAGMENT_DATA **FragmentTable,
+ IN UINT32 *FragmentCount
+ )
+{
+ EFI_STATUS Status;
+ UINTN Index;
+ UINT32 BytesCopied;
+ UINT8 *BufferIn;
+ UINT32 BufferInSize;
+ UINT8 *BufferInPtr;
+ TLS_RECORD_HEADER *RecordHeaderIn;
+ UINT16 ThisCipherMessageSize;
+ TLS_RECORD_HEADER *TempRecordHeader;
+ UINT16 ThisPlainMessageSize;
+ UINT8 *BufferOut;
+ UINT32 BufferOutSize;
+ INTN Ret;
+
+ Status = EFI_SUCCESS;
+ BytesCopied = 0;
+ BufferIn = NULL;
+ BufferInSize = 0;
+ BufferInPtr = NULL;
+ RecordHeaderIn = NULL;
+ TempRecordHeader = NULL;
+ BufferOut = NULL;
+ BufferOutSize = 0;
+ Ret = 0;
+
+ //
+ // Calculate the size according to the fragment table.
+ //
+ for (Index = 0; Index < *FragmentCount; Index++) {
+ BufferInSize += (*FragmentTable)[Index].FragmentLength;
+ }
+
+ //
+ // Allocate buffer for processing data
+ //
+ BufferIn = AllocateZeroPool (BufferInSize);
+ if (BufferIn == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto ERROR;
+ }
+
+ //
+ // Copy all TLS plain record header and payload to BufferIn
+ //
+ for (Index = 0; Index < *FragmentCount; Index++) {
+ CopyMem (
+ (BufferIn + BytesCopied),
+ (*FragmentTable)[Index].FragmentBuffer,
+ (*FragmentTable)[Index].FragmentLength
+ );
+ BytesCopied += (*FragmentTable)[Index].FragmentLength;
+ }
+
+ BufferOut = AllocateZeroPool (MAX_BUFFER_SIZE);
+ if (BufferOut == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto ERROR;
+ }
+
+ //
+ // Parsing buffer. Received packet may have multiple TLS record messages.
+ //
+ BufferInPtr = BufferIn;
+ TempRecordHeader = (TLS_RECORD_HEADER *) BufferOut;
+ while ((UINTN) BufferInPtr < (UINTN) BufferIn + BufferInSize) {
+ RecordHeaderIn = (TLS_RECORD_HEADER *) BufferInPtr;
+
+ if (RecordHeaderIn->ContentType != TLS_CONTENT_TYPE_APPLICATION_DATA) {
+ Status = EFI_INVALID_PARAMETER;
+ goto ERROR;
+ }
+
+ ThisCipherMessageSize = NTOHS (RecordHeaderIn->Length);
+
+ Ret = TlsCtrlTrafficIn (TlsInstance->TlsConn, (UINT8 *) (RecordHeaderIn), RECORD_HEADER_LEN + ThisCipherMessageSize);
+ if (Ret != RECORD_HEADER_LEN + ThisCipherMessageSize) {
+ TlsInstance->TlsSessionState = EfiTlsSessionError;
+ Status = EFI_ABORTED;
+ goto ERROR;
+ }
+
+ Ret = 0;
+ Ret = TlsRead (TlsInstance->TlsConn, (UINT8 *) (TempRecordHeader + 1), MAX_BUFFER_SIZE - BufferOutSize);
+
+ if (Ret > 0) {
+ ThisPlainMessageSize = (UINT16) Ret;
+ } else {
+ //
+ // No data was successfully decrypted, continue to decrypt other messages.
+ //
+ DEBUG ((EFI_D_WARN, "TlsDecryptPacket: No data read from TLS object.\n"));
+
+ ThisPlainMessageSize = 0;
+ }
+
+ CopyMem (TempRecordHeader, RecordHeaderIn, RECORD_HEADER_LEN);
+ TempRecordHeader->Length = ThisPlainMessageSize;
+ BufferOutSize += RECORD_HEADER_LEN + ThisPlainMessageSize;
+
+ BufferInPtr += RECORD_HEADER_LEN + ThisCipherMessageSize;
+ TempRecordHeader += RECORD_HEADER_LEN + ThisPlainMessageSize;
+ }
+
+ FreePool (BufferIn);
+ BufferIn = NULL;
+
+ //
+ // The caller will be responsible to handle the original fragment table
+ //
+ *FragmentTable = AllocateZeroPool (sizeof (EFI_TLS_FRAGMENT_DATA));
+ if (*FragmentTable == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto ERROR;
+ }
+
+ (*FragmentTable)[0].FragmentBuffer = BufferOut;
+ (*FragmentTable)[0].FragmentLength = BufferOutSize;
+ *FragmentCount = 1;
+
+ return Status;
+
+ERROR:
+
+ if (BufferIn != NULL) {
+ FreePool (BufferIn);
+ BufferIn = NULL;
+ }
+
+ if (BufferOut != NULL) {
+ FreePool (BufferOut);
+ BufferOut = NULL;
+ }
+
+ return Status;
+}
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