| 1 | /** @file
|
|---|
| 2 | The Miscellaneous Routines for TlsDxe driver.
|
|---|
| 3 |
|
|---|
| 4 | Copyright (c) 2016 - 2018, Intel Corporation. All rights reserved.<BR>
|
|---|
| 5 |
|
|---|
| 6 | SPDX-License-Identifier: BSD-2-Clause-Patent
|
|---|
| 7 |
|
|---|
| 8 | **/
|
|---|
| 9 |
|
|---|
| 10 | #include "TlsImpl.h"
|
|---|
| 11 |
|
|---|
| 12 | /**
|
|---|
| 13 | Encrypt the message listed in fragment.
|
|---|
| 14 |
|
|---|
| 15 | @param[in] TlsInstance The pointer to the TLS instance.
|
|---|
| 16 | @param[in, out] FragmentTable Pointer to a list of fragment.
|
|---|
| 17 | On input these fragments contain the TLS header and
|
|---|
| 18 | plain text TLS payload;
|
|---|
| 19 | On output these fragments contain the TLS header and
|
|---|
| 20 | cipher text TLS payload.
|
|---|
| 21 | @param[in] FragmentCount Number of fragment.
|
|---|
| 22 |
|
|---|
| 23 | @retval EFI_SUCCESS The operation completed successfully.
|
|---|
| 24 | @retval EFI_OUT_OF_RESOURCES Can't allocate memory resources.
|
|---|
| 25 | @retval EFI_ABORTED TLS session state is incorrect.
|
|---|
| 26 | @retval Others Other errors as indicated.
|
|---|
| 27 | **/
|
|---|
| 28 | EFI_STATUS
|
|---|
| 29 | TlsEncryptPacket (
|
|---|
| 30 | IN TLS_INSTANCE *TlsInstance,
|
|---|
| 31 | IN OUT EFI_TLS_FRAGMENT_DATA **FragmentTable,
|
|---|
| 32 | IN UINT32 *FragmentCount
|
|---|
| 33 | )
|
|---|
| 34 | {
|
|---|
| 35 | EFI_STATUS Status;
|
|---|
| 36 | UINTN Index;
|
|---|
| 37 | UINT32 BytesCopied;
|
|---|
| 38 | UINT32 BufferInSize;
|
|---|
| 39 | UINT8 *BufferIn;
|
|---|
| 40 | UINT8 *BufferInPtr;
|
|---|
| 41 | TLS_RECORD_HEADER *RecordHeaderIn;
|
|---|
| 42 | UINT16 ThisPlainMessageSize;
|
|---|
| 43 | TLS_RECORD_HEADER *TempRecordHeader;
|
|---|
| 44 | UINT16 ThisMessageSize;
|
|---|
| 45 | UINT32 BufferOutSize;
|
|---|
| 46 | UINT8 *BufferOut;
|
|---|
| 47 | UINT32 RecordCount;
|
|---|
| 48 | INTN Ret;
|
|---|
| 49 |
|
|---|
| 50 | Status = EFI_SUCCESS;
|
|---|
| 51 | BytesCopied = 0;
|
|---|
| 52 | BufferInSize = 0;
|
|---|
| 53 | BufferIn = NULL;
|
|---|
| 54 | BufferInPtr = NULL;
|
|---|
| 55 | RecordHeaderIn = NULL;
|
|---|
| 56 | TempRecordHeader = NULL;
|
|---|
| 57 | BufferOutSize = 0;
|
|---|
| 58 | BufferOut = NULL;
|
|---|
| 59 | RecordCount = 0;
|
|---|
| 60 | Ret = 0;
|
|---|
| 61 |
|
|---|
| 62 | //
|
|---|
| 63 | // Calculate the size according to the fragment table.
|
|---|
| 64 | //
|
|---|
| 65 | for (Index = 0; Index < *FragmentCount; Index++) {
|
|---|
| 66 | BufferInSize += (*FragmentTable)[Index].FragmentLength;
|
|---|
| 67 | }
|
|---|
| 68 |
|
|---|
| 69 | //
|
|---|
| 70 | // Allocate buffer for processing data.
|
|---|
| 71 | //
|
|---|
| 72 | BufferIn = AllocateZeroPool (BufferInSize);
|
|---|
| 73 | if (BufferIn == NULL) {
|
|---|
| 74 | Status = EFI_OUT_OF_RESOURCES;
|
|---|
| 75 | goto ERROR;
|
|---|
| 76 | }
|
|---|
| 77 |
|
|---|
| 78 | //
|
|---|
| 79 | // Copy all TLS plain record header and payload into BufferIn.
|
|---|
| 80 | //
|
|---|
| 81 | for (Index = 0; Index < *FragmentCount; Index++) {
|
|---|
| 82 | CopyMem (
|
|---|
| 83 | (BufferIn + BytesCopied),
|
|---|
| 84 | (*FragmentTable)[Index].FragmentBuffer,
|
|---|
| 85 | (*FragmentTable)[Index].FragmentLength
|
|---|
| 86 | );
|
|---|
| 87 | BytesCopied += (*FragmentTable)[Index].FragmentLength;
|
|---|
| 88 | }
|
|---|
| 89 |
|
|---|
| 90 | //
|
|---|
| 91 | // Count TLS record number.
|
|---|
| 92 | //
|
|---|
| 93 | BufferInPtr = BufferIn;
|
|---|
| 94 | while ((UINTN) BufferInPtr < (UINTN) BufferIn + BufferInSize) {
|
|---|
| 95 | RecordHeaderIn = (TLS_RECORD_HEADER *) BufferInPtr;
|
|---|
| 96 | if (RecordHeaderIn->ContentType != TlsContentTypeApplicationData || RecordHeaderIn->Length > TLS_PLAINTEXT_RECORD_MAX_PAYLOAD_LENGTH) {
|
|---|
| 97 | Status = EFI_INVALID_PARAMETER;
|
|---|
| 98 | goto ERROR;
|
|---|
| 99 | }
|
|---|
| 100 | BufferInPtr += TLS_RECORD_HEADER_LENGTH + RecordHeaderIn->Length;
|
|---|
| 101 | RecordCount ++;
|
|---|
| 102 | }
|
|---|
| 103 |
|
|---|
| 104 | //
|
|---|
| 105 | // Allocate enough buffer to hold TLS Ciphertext.
|
|---|
| 106 | //
|
|---|
| 107 | BufferOut = AllocateZeroPool (RecordCount * (TLS_RECORD_HEADER_LENGTH + TLS_CIPHERTEXT_RECORD_MAX_PAYLOAD_LENGTH));
|
|---|
| 108 | if (BufferOut == NULL) {
|
|---|
| 109 | Status = EFI_OUT_OF_RESOURCES;
|
|---|
| 110 | goto ERROR;
|
|---|
| 111 | }
|
|---|
| 112 |
|
|---|
| 113 | //
|
|---|
| 114 | // Parsing buffer. Received packet may have multiple TLS record messages.
|
|---|
| 115 | //
|
|---|
| 116 | BufferInPtr = BufferIn;
|
|---|
| 117 | TempRecordHeader = (TLS_RECORD_HEADER *) BufferOut;
|
|---|
| 118 | while ((UINTN) BufferInPtr < (UINTN) BufferIn + BufferInSize) {
|
|---|
| 119 | RecordHeaderIn = (TLS_RECORD_HEADER *) BufferInPtr;
|
|---|
| 120 |
|
|---|
| 121 | ThisPlainMessageSize = RecordHeaderIn->Length;
|
|---|
| 122 |
|
|---|
| 123 | TlsWrite (TlsInstance->TlsConn, (UINT8 *) (RecordHeaderIn + 1), ThisPlainMessageSize);
|
|---|
| 124 |
|
|---|
| 125 | Ret = TlsCtrlTrafficOut (TlsInstance->TlsConn, (UINT8 *)(TempRecordHeader), TLS_RECORD_HEADER_LENGTH + TLS_CIPHERTEXT_RECORD_MAX_PAYLOAD_LENGTH);
|
|---|
| 126 |
|
|---|
| 127 | if (Ret > 0) {
|
|---|
| 128 | ThisMessageSize = (UINT16) Ret;
|
|---|
| 129 | } else {
|
|---|
| 130 | //
|
|---|
| 131 | // No data was successfully encrypted, continue to encrypt other messages.
|
|---|
| 132 | //
|
|---|
| 133 | DEBUG ((EFI_D_WARN, "TlsEncryptPacket: No data read from TLS object.\n"));
|
|---|
| 134 |
|
|---|
| 135 | ThisMessageSize = 0;
|
|---|
| 136 | }
|
|---|
| 137 |
|
|---|
| 138 | BufferOutSize += ThisMessageSize;
|
|---|
| 139 |
|
|---|
| 140 | BufferInPtr += TLS_RECORD_HEADER_LENGTH + ThisPlainMessageSize;
|
|---|
| 141 | TempRecordHeader = (TLS_RECORD_HEADER *)((UINT8 *)TempRecordHeader + ThisMessageSize);
|
|---|
| 142 | }
|
|---|
| 143 |
|
|---|
| 144 | FreePool (BufferIn);
|
|---|
| 145 | BufferIn = NULL;
|
|---|
| 146 |
|
|---|
| 147 | //
|
|---|
| 148 | // The caller will be responsible to handle the original fragment table.
|
|---|
| 149 | //
|
|---|
| 150 | *FragmentTable = AllocateZeroPool (sizeof (EFI_TLS_FRAGMENT_DATA));
|
|---|
| 151 | if (*FragmentTable == NULL) {
|
|---|
| 152 | Status = EFI_OUT_OF_RESOURCES;
|
|---|
| 153 | goto ERROR;
|
|---|
| 154 | }
|
|---|
| 155 |
|
|---|
| 156 | (*FragmentTable)[0].FragmentBuffer = BufferOut;
|
|---|
| 157 | (*FragmentTable)[0].FragmentLength = BufferOutSize;
|
|---|
| 158 | *FragmentCount = 1;
|
|---|
| 159 |
|
|---|
| 160 | return Status;
|
|---|
| 161 |
|
|---|
| 162 | ERROR:
|
|---|
| 163 |
|
|---|
| 164 | if (BufferIn != NULL) {
|
|---|
| 165 | FreePool (BufferIn);
|
|---|
| 166 | BufferIn = NULL;
|
|---|
| 167 | }
|
|---|
| 168 |
|
|---|
| 169 | if (BufferOut != NULL) {
|
|---|
| 170 | FreePool (BufferOut);
|
|---|
| 171 | BufferOut = NULL;
|
|---|
| 172 | }
|
|---|
| 173 |
|
|---|
| 174 | return Status;
|
|---|
| 175 | }
|
|---|
| 176 |
|
|---|
| 177 | /**
|
|---|
| 178 | Decrypt the message listed in fragment.
|
|---|
| 179 |
|
|---|
| 180 | @param[in] TlsInstance The pointer to the TLS instance.
|
|---|
| 181 | @param[in, out] FragmentTable Pointer to a list of fragment.
|
|---|
| 182 | On input these fragments contain the TLS header and
|
|---|
| 183 | cipher text TLS payload;
|
|---|
| 184 | On output these fragments contain the TLS header and
|
|---|
| 185 | plain text TLS payload.
|
|---|
| 186 | @param[in] FragmentCount Number of fragment.
|
|---|
| 187 |
|
|---|
| 188 | @retval EFI_SUCCESS The operation completed successfully.
|
|---|
| 189 | @retval EFI_OUT_OF_RESOURCES Can't allocate memory resources.
|
|---|
| 190 | @retval EFI_ABORTED TLS session state is incorrect.
|
|---|
| 191 | @retval Others Other errors as indicated.
|
|---|
| 192 | **/
|
|---|
| 193 | EFI_STATUS
|
|---|
| 194 | TlsDecryptPacket (
|
|---|
| 195 | IN TLS_INSTANCE *TlsInstance,
|
|---|
| 196 | IN OUT EFI_TLS_FRAGMENT_DATA **FragmentTable,
|
|---|
| 197 | IN UINT32 *FragmentCount
|
|---|
| 198 | )
|
|---|
| 199 | {
|
|---|
| 200 | EFI_STATUS Status;
|
|---|
| 201 | UINTN Index;
|
|---|
| 202 | UINT32 BytesCopied;
|
|---|
| 203 | UINT8 *BufferIn;
|
|---|
| 204 | UINT32 BufferInSize;
|
|---|
| 205 | UINT8 *BufferInPtr;
|
|---|
| 206 | TLS_RECORD_HEADER *RecordHeaderIn;
|
|---|
| 207 | UINT16 ThisCipherMessageSize;
|
|---|
| 208 | TLS_RECORD_HEADER *TempRecordHeader;
|
|---|
| 209 | UINT16 ThisPlainMessageSize;
|
|---|
| 210 | UINT8 *BufferOut;
|
|---|
| 211 | UINT32 BufferOutSize;
|
|---|
| 212 | UINT32 RecordCount;
|
|---|
| 213 | INTN Ret;
|
|---|
| 214 |
|
|---|
| 215 | Status = EFI_SUCCESS;
|
|---|
| 216 | BytesCopied = 0;
|
|---|
| 217 | BufferIn = NULL;
|
|---|
| 218 | BufferInSize = 0;
|
|---|
| 219 | BufferInPtr = NULL;
|
|---|
| 220 | RecordHeaderIn = NULL;
|
|---|
| 221 | TempRecordHeader = NULL;
|
|---|
| 222 | BufferOut = NULL;
|
|---|
| 223 | BufferOutSize = 0;
|
|---|
| 224 | RecordCount = 0;
|
|---|
| 225 | Ret = 0;
|
|---|
| 226 |
|
|---|
| 227 | //
|
|---|
| 228 | // Calculate the size according to the fragment table.
|
|---|
| 229 | //
|
|---|
| 230 | for (Index = 0; Index < *FragmentCount; Index++) {
|
|---|
| 231 | BufferInSize += (*FragmentTable)[Index].FragmentLength;
|
|---|
| 232 | }
|
|---|
| 233 |
|
|---|
| 234 | //
|
|---|
| 235 | // Allocate buffer for processing data
|
|---|
| 236 | //
|
|---|
| 237 | BufferIn = AllocateZeroPool (BufferInSize);
|
|---|
| 238 | if (BufferIn == NULL) {
|
|---|
| 239 | Status = EFI_OUT_OF_RESOURCES;
|
|---|
| 240 | goto ERROR;
|
|---|
| 241 | }
|
|---|
| 242 |
|
|---|
| 243 | //
|
|---|
| 244 | // Copy all TLS plain record header and payload to BufferIn
|
|---|
| 245 | //
|
|---|
| 246 | for (Index = 0; Index < *FragmentCount; Index++) {
|
|---|
| 247 | CopyMem (
|
|---|
| 248 | (BufferIn + BytesCopied),
|
|---|
| 249 | (*FragmentTable)[Index].FragmentBuffer,
|
|---|
| 250 | (*FragmentTable)[Index].FragmentLength
|
|---|
| 251 | );
|
|---|
| 252 | BytesCopied += (*FragmentTable)[Index].FragmentLength;
|
|---|
| 253 | }
|
|---|
| 254 |
|
|---|
| 255 | //
|
|---|
| 256 | // Count TLS record number.
|
|---|
| 257 | //
|
|---|
| 258 | BufferInPtr = BufferIn;
|
|---|
| 259 | while ((UINTN) BufferInPtr < (UINTN) BufferIn + BufferInSize) {
|
|---|
| 260 | RecordHeaderIn = (TLS_RECORD_HEADER *) BufferInPtr;
|
|---|
| 261 | if (RecordHeaderIn->ContentType != TlsContentTypeApplicationData || NTOHS (RecordHeaderIn->Length) > TLS_CIPHERTEXT_RECORD_MAX_PAYLOAD_LENGTH) {
|
|---|
| 262 | Status = EFI_INVALID_PARAMETER;
|
|---|
| 263 | goto ERROR;
|
|---|
| 264 | }
|
|---|
| 265 | BufferInPtr += TLS_RECORD_HEADER_LENGTH + NTOHS (RecordHeaderIn->Length);
|
|---|
| 266 | RecordCount ++;
|
|---|
| 267 | }
|
|---|
| 268 |
|
|---|
| 269 | //
|
|---|
| 270 | // Allocate enough buffer to hold TLS Plaintext.
|
|---|
| 271 | //
|
|---|
| 272 | BufferOut = AllocateZeroPool (RecordCount * (TLS_RECORD_HEADER_LENGTH + TLS_PLAINTEXT_RECORD_MAX_PAYLOAD_LENGTH));
|
|---|
| 273 | if (BufferOut == NULL) {
|
|---|
| 274 | Status = EFI_OUT_OF_RESOURCES;
|
|---|
| 275 | goto ERROR;
|
|---|
| 276 | }
|
|---|
| 277 |
|
|---|
| 278 | //
|
|---|
| 279 | // Parsing buffer. Received packet may have multiple TLS record messages.
|
|---|
| 280 | //
|
|---|
| 281 | BufferInPtr = BufferIn;
|
|---|
| 282 | TempRecordHeader = (TLS_RECORD_HEADER *) BufferOut;
|
|---|
| 283 | while ((UINTN) BufferInPtr < (UINTN) BufferIn + BufferInSize) {
|
|---|
| 284 | RecordHeaderIn = (TLS_RECORD_HEADER *) BufferInPtr;
|
|---|
| 285 |
|
|---|
| 286 | ThisCipherMessageSize = NTOHS (RecordHeaderIn->Length);
|
|---|
| 287 |
|
|---|
| 288 | Ret = TlsCtrlTrafficIn (TlsInstance->TlsConn, (UINT8 *) (RecordHeaderIn), TLS_RECORD_HEADER_LENGTH + ThisCipherMessageSize);
|
|---|
| 289 | if (Ret != TLS_RECORD_HEADER_LENGTH + ThisCipherMessageSize) {
|
|---|
| 290 | TlsInstance->TlsSessionState = EfiTlsSessionError;
|
|---|
| 291 | Status = EFI_ABORTED;
|
|---|
| 292 | goto ERROR;
|
|---|
| 293 | }
|
|---|
| 294 |
|
|---|
| 295 | Ret = 0;
|
|---|
| 296 | Ret = TlsRead (TlsInstance->TlsConn, (UINT8 *) (TempRecordHeader + 1), TLS_PLAINTEXT_RECORD_MAX_PAYLOAD_LENGTH);
|
|---|
| 297 |
|
|---|
| 298 | if (Ret > 0) {
|
|---|
| 299 | ThisPlainMessageSize = (UINT16) Ret;
|
|---|
| 300 | } else {
|
|---|
| 301 | //
|
|---|
| 302 | // No data was successfully decrypted, continue to decrypt other messages.
|
|---|
| 303 | //
|
|---|
| 304 | DEBUG ((EFI_D_WARN, "TlsDecryptPacket: No data read from TLS object.\n"));
|
|---|
| 305 |
|
|---|
| 306 | ThisPlainMessageSize = 0;
|
|---|
| 307 | }
|
|---|
| 308 |
|
|---|
| 309 | CopyMem (TempRecordHeader, RecordHeaderIn, TLS_RECORD_HEADER_LENGTH);
|
|---|
| 310 | TempRecordHeader->Length = ThisPlainMessageSize;
|
|---|
| 311 | BufferOutSize += TLS_RECORD_HEADER_LENGTH + ThisPlainMessageSize;
|
|---|
| 312 |
|
|---|
| 313 | BufferInPtr += TLS_RECORD_HEADER_LENGTH + ThisCipherMessageSize;
|
|---|
| 314 | TempRecordHeader = (TLS_RECORD_HEADER *)((UINT8 *)TempRecordHeader + TLS_RECORD_HEADER_LENGTH + ThisPlainMessageSize);
|
|---|
| 315 | }
|
|---|
| 316 |
|
|---|
| 317 | FreePool (BufferIn);
|
|---|
| 318 | BufferIn = NULL;
|
|---|
| 319 |
|
|---|
| 320 | //
|
|---|
| 321 | // The caller will be responsible to handle the original fragment table
|
|---|
| 322 | //
|
|---|
| 323 | *FragmentTable = AllocateZeroPool (sizeof (EFI_TLS_FRAGMENT_DATA));
|
|---|
| 324 | if (*FragmentTable == NULL) {
|
|---|
| 325 | Status = EFI_OUT_OF_RESOURCES;
|
|---|
| 326 | goto ERROR;
|
|---|
| 327 | }
|
|---|
| 328 |
|
|---|
| 329 | (*FragmentTable)[0].FragmentBuffer = BufferOut;
|
|---|
| 330 | (*FragmentTable)[0].FragmentLength = BufferOutSize;
|
|---|
| 331 | *FragmentCount = 1;
|
|---|
| 332 |
|
|---|
| 333 | return Status;
|
|---|
| 334 |
|
|---|
| 335 | ERROR:
|
|---|
| 336 |
|
|---|
| 337 | if (BufferIn != NULL) {
|
|---|
| 338 | FreePool (BufferIn);
|
|---|
| 339 | BufferIn = NULL;
|
|---|
| 340 | }
|
|---|
| 341 |
|
|---|
| 342 | if (BufferOut != NULL) {
|
|---|
| 343 | FreePool (BufferOut);
|
|---|
| 344 | BufferOut = NULL;
|
|---|
| 345 | }
|
|---|
| 346 |
|
|---|
| 347 | return Status;
|
|---|
| 348 | }
|
|---|
| 349 |
|
|---|
