| /* |
| * FIPS-46-3 compliant Triple-DES implementation |
| * |
| * Copyright The Mbed TLS Contributors |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| * not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * DES, on which TDES is based, was originally designed by Horst Feistel |
| * at IBM in 1974, and was adopted as a standard by NIST (formerly NBS). |
| * |
| * http://csrc.nist.gov/publications/fips/fips46-3/fips46-3.pdf |
| */ |
| |
| #include "common.h" |
| |
| #if defined(MBEDTLS_DES_C) |
| |
| #include "mbedtls/des.h" |
| #include "mbedtls/error.h" |
| #include "mbedtls/platform_util.h" |
| |
| #include <string.h> |
| |
| #include "mbedtls/platform.h" |
| |
| #if !defined(MBEDTLS_DES_ALT) |
| |
| /* |
| * Expanded DES S-boxes |
| */ |
| static const uint32_t SB1[64] = |
| { |
| 0x01010400, 0x00000000, 0x00010000, 0x01010404, |
| 0x01010004, 0x00010404, 0x00000004, 0x00010000, |
| 0x00000400, 0x01010400, 0x01010404, 0x00000400, |
| 0x01000404, 0x01010004, 0x01000000, 0x00000004, |
| 0x00000404, 0x01000400, 0x01000400, 0x00010400, |
| 0x00010400, 0x01010000, 0x01010000, 0x01000404, |
| 0x00010004, 0x01000004, 0x01000004, 0x00010004, |
| 0x00000000, 0x00000404, 0x00010404, 0x01000000, |
| 0x00010000, 0x01010404, 0x00000004, 0x01010000, |
| 0x01010400, 0x01000000, 0x01000000, 0x00000400, |
| 0x01010004, 0x00010000, 0x00010400, 0x01000004, |
| 0x00000400, 0x00000004, 0x01000404, 0x00010404, |
| 0x01010404, 0x00010004, 0x01010000, 0x01000404, |
| 0x01000004, 0x00000404, 0x00010404, 0x01010400, |
| 0x00000404, 0x01000400, 0x01000400, 0x00000000, |
| 0x00010004, 0x00010400, 0x00000000, 0x01010004 |
| }; |
| |
| static const uint32_t SB2[64] = |
| { |
| 0x80108020, 0x80008000, 0x00008000, 0x00108020, |
| 0x00100000, 0x00000020, 0x80100020, 0x80008020, |
| 0x80000020, 0x80108020, 0x80108000, 0x80000000, |
| 0x80008000, 0x00100000, 0x00000020, 0x80100020, |
| 0x00108000, 0x00100020, 0x80008020, 0x00000000, |
| 0x80000000, 0x00008000, 0x00108020, 0x80100000, |
| 0x00100020, 0x80000020, 0x00000000, 0x00108000, |
| 0x00008020, 0x80108000, 0x80100000, 0x00008020, |
| 0x00000000, 0x00108020, 0x80100020, 0x00100000, |
| 0x80008020, 0x80100000, 0x80108000, 0x00008000, |
| 0x80100000, 0x80008000, 0x00000020, 0x80108020, |
| 0x00108020, 0x00000020, 0x00008000, 0x80000000, |
| 0x00008020, 0x80108000, 0x00100000, 0x80000020, |
| 0x00100020, 0x80008020, 0x80000020, 0x00100020, |
| 0x00108000, 0x00000000, 0x80008000, 0x00008020, |
| 0x80000000, 0x80100020, 0x80108020, 0x00108000 |
| }; |
| |
| static const uint32_t SB3[64] = |
| { |
| 0x00000208, 0x08020200, 0x00000000, 0x08020008, |
| 0x08000200, 0x00000000, 0x00020208, 0x08000200, |
| 0x00020008, 0x08000008, 0x08000008, 0x00020000, |
| 0x08020208, 0x00020008, 0x08020000, 0x00000208, |
| 0x08000000, 0x00000008, 0x08020200, 0x00000200, |
| 0x00020200, 0x08020000, 0x08020008, 0x00020208, |
| 0x08000208, 0x00020200, 0x00020000, 0x08000208, |
| 0x00000008, 0x08020208, 0x00000200, 0x08000000, |
| 0x08020200, 0x08000000, 0x00020008, 0x00000208, |
| 0x00020000, 0x08020200, 0x08000200, 0x00000000, |
| 0x00000200, 0x00020008, 0x08020208, 0x08000200, |
| 0x08000008, 0x00000200, 0x00000000, 0x08020008, |
| 0x08000208, 0x00020000, 0x08000000, 0x08020208, |
| 0x00000008, 0x00020208, 0x00020200, 0x08000008, |
| 0x08020000, 0x08000208, 0x00000208, 0x08020000, |
| 0x00020208, 0x00000008, 0x08020008, 0x00020200 |
| }; |
| |
| static const uint32_t SB4[64] = |
| { |
| 0x00802001, 0x00002081, 0x00002081, 0x00000080, |
| 0x00802080, 0x00800081, 0x00800001, 0x00002001, |
| 0x00000000, 0x00802000, 0x00802000, 0x00802081, |
| 0x00000081, 0x00000000, 0x00800080, 0x00800001, |
| 0x00000001, 0x00002000, 0x00800000, 0x00802001, |
| 0x00000080, 0x00800000, 0x00002001, 0x00002080, |
| 0x00800081, 0x00000001, 0x00002080, 0x00800080, |
| 0x00002000, 0x00802080, 0x00802081, 0x00000081, |
| 0x00800080, 0x00800001, 0x00802000, 0x00802081, |
| 0x00000081, 0x00000000, 0x00000000, 0x00802000, |
| 0x00002080, 0x00800080, 0x00800081, 0x00000001, |
| 0x00802001, 0x00002081, 0x00002081, 0x00000080, |
| 0x00802081, 0x00000081, 0x00000001, 0x00002000, |
| 0x00800001, 0x00002001, 0x00802080, 0x00800081, |
| 0x00002001, 0x00002080, 0x00800000, 0x00802001, |
| 0x00000080, 0x00800000, 0x00002000, 0x00802080 |
| }; |
| |
| static const uint32_t SB5[64] = |
| { |
| 0x00000100, 0x02080100, 0x02080000, 0x42000100, |
| 0x00080000, 0x00000100, 0x40000000, 0x02080000, |
| 0x40080100, 0x00080000, 0x02000100, 0x40080100, |
| 0x42000100, 0x42080000, 0x00080100, 0x40000000, |
| 0x02000000, 0x40080000, 0x40080000, 0x00000000, |
| 0x40000100, 0x42080100, 0x42080100, 0x02000100, |
| 0x42080000, 0x40000100, 0x00000000, 0x42000000, |
| 0x02080100, 0x02000000, 0x42000000, 0x00080100, |
| 0x00080000, 0x42000100, 0x00000100, 0x02000000, |
| 0x40000000, 0x02080000, 0x42000100, 0x40080100, |
| 0x02000100, 0x40000000, 0x42080000, 0x02080100, |
| 0x40080100, 0x00000100, 0x02000000, 0x42080000, |
| 0x42080100, 0x00080100, 0x42000000, 0x42080100, |
| 0x02080000, 0x00000000, 0x40080000, 0x42000000, |
| 0x00080100, 0x02000100, 0x40000100, 0x00080000, |
| 0x00000000, 0x40080000, 0x02080100, 0x40000100 |
| }; |
| |
| static const uint32_t SB6[64] = |
| { |
| 0x20000010, 0x20400000, 0x00004000, 0x20404010, |
| 0x20400000, 0x00000010, 0x20404010, 0x00400000, |
| 0x20004000, 0x00404010, 0x00400000, 0x20000010, |
| 0x00400010, 0x20004000, 0x20000000, 0x00004010, |
| 0x00000000, 0x00400010, 0x20004010, 0x00004000, |
| 0x00404000, 0x20004010, 0x00000010, 0x20400010, |
| 0x20400010, 0x00000000, 0x00404010, 0x20404000, |
| 0x00004010, 0x00404000, 0x20404000, 0x20000000, |
| 0x20004000, 0x00000010, 0x20400010, 0x00404000, |
| 0x20404010, 0x00400000, 0x00004010, 0x20000010, |
| 0x00400000, 0x20004000, 0x20000000, 0x00004010, |
| 0x20000010, 0x20404010, 0x00404000, 0x20400000, |
| 0x00404010, 0x20404000, 0x00000000, 0x20400010, |
| 0x00000010, 0x00004000, 0x20400000, 0x00404010, |
| 0x00004000, 0x00400010, 0x20004010, 0x00000000, |
| 0x20404000, 0x20000000, 0x00400010, 0x20004010 |
| }; |
| |
| static const uint32_t SB7[64] = |
| { |
| 0x00200000, 0x04200002, 0x04000802, 0x00000000, |
| 0x00000800, 0x04000802, 0x00200802, 0x04200800, |
| 0x04200802, 0x00200000, 0x00000000, 0x04000002, |
| 0x00000002, 0x04000000, 0x04200002, 0x00000802, |
| 0x04000800, 0x00200802, 0x00200002, 0x04000800, |
| 0x04000002, 0x04200000, 0x04200800, 0x00200002, |
| 0x04200000, 0x00000800, 0x00000802, 0x04200802, |
| 0x00200800, 0x00000002, 0x04000000, 0x00200800, |
| 0x04000000, 0x00200800, 0x00200000, 0x04000802, |
| 0x04000802, 0x04200002, 0x04200002, 0x00000002, |
| 0x00200002, 0x04000000, 0x04000800, 0x00200000, |
| 0x04200800, 0x00000802, 0x00200802, 0x04200800, |
| 0x00000802, 0x04000002, 0x04200802, 0x04200000, |
| 0x00200800, 0x00000000, 0x00000002, 0x04200802, |
| 0x00000000, 0x00200802, 0x04200000, 0x00000800, |
| 0x04000002, 0x04000800, 0x00000800, 0x00200002 |
| }; |
| |
| static const uint32_t SB8[64] = |
| { |
| 0x10001040, 0x00001000, 0x00040000, 0x10041040, |
| 0x10000000, 0x10001040, 0x00000040, 0x10000000, |
| 0x00040040, 0x10040000, 0x10041040, 0x00041000, |
| 0x10041000, 0x00041040, 0x00001000, 0x00000040, |
| 0x10040000, 0x10000040, 0x10001000, 0x00001040, |
| 0x00041000, 0x00040040, 0x10040040, 0x10041000, |
| 0x00001040, 0x00000000, 0x00000000, 0x10040040, |
| 0x10000040, 0x10001000, 0x00041040, 0x00040000, |
| 0x00041040, 0x00040000, 0x10041000, 0x00001000, |
| 0x00000040, 0x10040040, 0x00001000, 0x00041040, |
| 0x10001000, 0x00000040, 0x10000040, 0x10040000, |
| 0x10040040, 0x10000000, 0x00040000, 0x10001040, |
| 0x00000000, 0x10041040, 0x00040040, 0x10000040, |
| 0x10040000, 0x10001000, 0x10001040, 0x00000000, |
| 0x10041040, 0x00041000, 0x00041000, 0x00001040, |
| 0x00001040, 0x00040040, 0x10000000, 0x10041000 |
| }; |
| |
| /* |
| * PC1: left and right halves bit-swap |
| */ |
| static const uint32_t LHs[16] = |
| { |
| 0x00000000, 0x00000001, 0x00000100, 0x00000101, |
| 0x00010000, 0x00010001, 0x00010100, 0x00010101, |
| 0x01000000, 0x01000001, 0x01000100, 0x01000101, |
| 0x01010000, 0x01010001, 0x01010100, 0x01010101 |
| }; |
| |
| static const uint32_t RHs[16] = |
| { |
| 0x00000000, 0x01000000, 0x00010000, 0x01010000, |
| 0x00000100, 0x01000100, 0x00010100, 0x01010100, |
| 0x00000001, 0x01000001, 0x00010001, 0x01010001, |
| 0x00000101, 0x01000101, 0x00010101, 0x01010101, |
| }; |
| |
| /* |
| * Initial Permutation macro |
| */ |
| #define DES_IP(X, Y) \ |
| do \ |
| { \ |
| T = (((X) >> 4) ^ (Y)) & 0x0F0F0F0F; (Y) ^= T; (X) ^= (T << 4); \ |
| T = (((X) >> 16) ^ (Y)) & 0x0000FFFF; (Y) ^= T; (X) ^= (T << 16); \ |
| T = (((Y) >> 2) ^ (X)) & 0x33333333; (X) ^= T; (Y) ^= (T << 2); \ |
| T = (((Y) >> 8) ^ (X)) & 0x00FF00FF; (X) ^= T; (Y) ^= (T << 8); \ |
| (Y) = (((Y) << 1) | ((Y) >> 31)) & 0xFFFFFFFF; \ |
| T = ((X) ^ (Y)) & 0xAAAAAAAA; (Y) ^= T; (X) ^= T; \ |
| (X) = (((X) << 1) | ((X) >> 31)) & 0xFFFFFFFF; \ |
| } while (0) |
| |
| /* |
| * Final Permutation macro |
| */ |
| #define DES_FP(X, Y) \ |
| do \ |
| { \ |
| (X) = (((X) << 31) | ((X) >> 1)) & 0xFFFFFFFF; \ |
| T = ((X) ^ (Y)) & 0xAAAAAAAA; (X) ^= T; (Y) ^= T; \ |
| (Y) = (((Y) << 31) | ((Y) >> 1)) & 0xFFFFFFFF; \ |
| T = (((Y) >> 8) ^ (X)) & 0x00FF00FF; (X) ^= T; (Y) ^= (T << 8); \ |
| T = (((Y) >> 2) ^ (X)) & 0x33333333; (X) ^= T; (Y) ^= (T << 2); \ |
| T = (((X) >> 16) ^ (Y)) & 0x0000FFFF; (Y) ^= T; (X) ^= (T << 16); \ |
| T = (((X) >> 4) ^ (Y)) & 0x0F0F0F0F; (Y) ^= T; (X) ^= (T << 4); \ |
| } while (0) |
| |
| /* |
| * DES round macro |
| */ |
| #define DES_ROUND(X, Y) \ |
| do \ |
| { \ |
| T = *SK++ ^ (X); \ |
| (Y) ^= SB8[(T) & 0x3F] ^ \ |
| SB6[(T >> 8) & 0x3F] ^ \ |
| SB4[(T >> 16) & 0x3F] ^ \ |
| SB2[(T >> 24) & 0x3F]; \ |
| \ |
| T = *SK++ ^ (((X) << 28) | ((X) >> 4)); \ |
| (Y) ^= SB7[(T) & 0x3F] ^ \ |
| SB5[(T >> 8) & 0x3F] ^ \ |
| SB3[(T >> 16) & 0x3F] ^ \ |
| SB1[(T >> 24) & 0x3F]; \ |
| } while (0) |
| |
| #define SWAP(a, b) \ |
| do \ |
| { \ |
| uint32_t t = (a); (a) = (b); (b) = t; t = 0; \ |
| } while (0) |
| |
| void mbedtls_des_init(mbedtls_des_context *ctx) |
| { |
| memset(ctx, 0, sizeof(mbedtls_des_context)); |
| } |
| |
| void mbedtls_des_free(mbedtls_des_context *ctx) |
| { |
| if (ctx == NULL) { |
| return; |
| } |
| |
| mbedtls_platform_zeroize(ctx, sizeof(mbedtls_des_context)); |
| } |
| |
| void mbedtls_des3_init(mbedtls_des3_context *ctx) |
| { |
| memset(ctx, 0, sizeof(mbedtls_des3_context)); |
| } |
| |
| void mbedtls_des3_free(mbedtls_des3_context *ctx) |
| { |
| if (ctx == NULL) { |
| return; |
| } |
| |
| mbedtls_platform_zeroize(ctx, sizeof(mbedtls_des3_context)); |
| } |
| |
| static const unsigned char odd_parity_table[128] = { 1, 2, 4, 7, 8, |
| 11, 13, 14, 16, 19, 21, 22, 25, 26, 28, 31, 32, |
| 35, 37, 38, 41, 42, 44, |
| 47, 49, 50, 52, 55, 56, 59, 61, 62, 64, 67, 69, |
| 70, 73, 74, 76, 79, 81, |
| 82, 84, 87, 88, 91, 93, 94, 97, 98, 100, 103, |
| 104, 107, 109, 110, 112, |
| 115, 117, 118, 121, 122, 124, 127, 128, 131, |
| 133, 134, 137, 138, 140, |
| 143, 145, 146, 148, 151, 152, 155, 157, 158, |
| 161, 162, 164, 167, 168, |
| 171, 173, 174, 176, 179, 181, 182, 185, 186, |
| 188, 191, 193, 194, 196, |
| 199, 200, 203, 205, 206, 208, 211, 213, 214, |
| 217, 218, 220, 223, 224, |
| 227, 229, 230, 233, 234, 236, 239, 241, 242, |
| 244, 247, 248, 251, 253, |
| 254 }; |
| |
| void mbedtls_des_key_set_parity(unsigned char key[MBEDTLS_DES_KEY_SIZE]) |
| { |
| int i; |
| |
| for (i = 0; i < MBEDTLS_DES_KEY_SIZE; i++) { |
| key[i] = odd_parity_table[key[i] / 2]; |
| } |
| } |
| |
| /* |
| * Check the given key's parity, returns 1 on failure, 0 on SUCCESS |
| */ |
| int mbedtls_des_key_check_key_parity(const unsigned char key[MBEDTLS_DES_KEY_SIZE]) |
| { |
| int i; |
| |
| for (i = 0; i < MBEDTLS_DES_KEY_SIZE; i++) { |
| if (key[i] != odd_parity_table[key[i] / 2]) { |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Table of weak and semi-weak keys |
| * |
| * Source: http://en.wikipedia.org/wiki/Weak_key |
| * |
| * Weak: |
| * Alternating ones + zeros (0x0101010101010101) |
| * Alternating 'F' + 'E' (0xFEFEFEFEFEFEFEFE) |
| * '0xE0E0E0E0F1F1F1F1' |
| * '0x1F1F1F1F0E0E0E0E' |
| * |
| * Semi-weak: |
| * 0x011F011F010E010E and 0x1F011F010E010E01 |
| * 0x01E001E001F101F1 and 0xE001E001F101F101 |
| * 0x01FE01FE01FE01FE and 0xFE01FE01FE01FE01 |
| * 0x1FE01FE00EF10EF1 and 0xE01FE01FF10EF10E |
| * 0x1FFE1FFE0EFE0EFE and 0xFE1FFE1FFE0EFE0E |
| * 0xE0FEE0FEF1FEF1FE and 0xFEE0FEE0FEF1FEF1 |
| * |
| */ |
| |
| #define WEAK_KEY_COUNT 16 |
| |
| static const unsigned char weak_key_table[WEAK_KEY_COUNT][MBEDTLS_DES_KEY_SIZE] = |
| { |
| { 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 }, |
| { 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE }, |
| { 0x1F, 0x1F, 0x1F, 0x1F, 0x0E, 0x0E, 0x0E, 0x0E }, |
| { 0xE0, 0xE0, 0xE0, 0xE0, 0xF1, 0xF1, 0xF1, 0xF1 }, |
| |
| { 0x01, 0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E }, |
| { 0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E, 0x01 }, |
| { 0x01, 0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1 }, |
| { 0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1, 0x01 }, |
| { 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE }, |
| { 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01 }, |
| { 0x1F, 0xE0, 0x1F, 0xE0, 0x0E, 0xF1, 0x0E, 0xF1 }, |
| { 0xE0, 0x1F, 0xE0, 0x1F, 0xF1, 0x0E, 0xF1, 0x0E }, |
| { 0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E, 0xFE }, |
| { 0xFE, 0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E }, |
| { 0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1, 0xFE }, |
| { 0xFE, 0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1 } |
| }; |
| |
| int mbedtls_des_key_check_weak(const unsigned char key[MBEDTLS_DES_KEY_SIZE]) |
| { |
| int i; |
| |
| for (i = 0; i < WEAK_KEY_COUNT; i++) { |
| if (memcmp(weak_key_table[i], key, MBEDTLS_DES_KEY_SIZE) == 0) { |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| #if !defined(MBEDTLS_DES_SETKEY_ALT) |
| void mbedtls_des_setkey(uint32_t SK[32], const unsigned char key[MBEDTLS_DES_KEY_SIZE]) |
| { |
| int i; |
| uint32_t X, Y, T; |
| |
| X = MBEDTLS_GET_UINT32_BE(key, 0); |
| Y = MBEDTLS_GET_UINT32_BE(key, 4); |
| |
| /* |
| * Permuted Choice 1 |
| */ |
| T = ((Y >> 4) ^ X) & 0x0F0F0F0F; X ^= T; Y ^= (T << 4); |
| T = ((Y) ^ X) & 0x10101010; X ^= T; Y ^= (T); |
| |
| X = (LHs[(X) & 0xF] << 3) | (LHs[(X >> 8) & 0xF] << 2) |
| | (LHs[(X >> 16) & 0xF] << 1) | (LHs[(X >> 24) & 0xF]) |
| | (LHs[(X >> 5) & 0xF] << 7) | (LHs[(X >> 13) & 0xF] << 6) |
| | (LHs[(X >> 21) & 0xF] << 5) | (LHs[(X >> 29) & 0xF] << 4); |
| |
| Y = (RHs[(Y >> 1) & 0xF] << 3) | (RHs[(Y >> 9) & 0xF] << 2) |
| | (RHs[(Y >> 17) & 0xF] << 1) | (RHs[(Y >> 25) & 0xF]) |
| | (RHs[(Y >> 4) & 0xF] << 7) | (RHs[(Y >> 12) & 0xF] << 6) |
| | (RHs[(Y >> 20) & 0xF] << 5) | (RHs[(Y >> 28) & 0xF] << 4); |
| |
| X &= 0x0FFFFFFF; |
| Y &= 0x0FFFFFFF; |
| |
| /* |
| * calculate subkeys |
| */ |
| for (i = 0; i < 16; i++) { |
| if (i < 2 || i == 8 || i == 15) { |
| X = ((X << 1) | (X >> 27)) & 0x0FFFFFFF; |
| Y = ((Y << 1) | (Y >> 27)) & 0x0FFFFFFF; |
| } else { |
| X = ((X << 2) | (X >> 26)) & 0x0FFFFFFF; |
| Y = ((Y << 2) | (Y >> 26)) & 0x0FFFFFFF; |
| } |
| |
| *SK++ = ((X << 4) & 0x24000000) | ((X << 28) & 0x10000000) |
| | ((X << 14) & 0x08000000) | ((X << 18) & 0x02080000) |
| | ((X << 6) & 0x01000000) | ((X << 9) & 0x00200000) |
| | ((X >> 1) & 0x00100000) | ((X << 10) & 0x00040000) |
| | ((X << 2) & 0x00020000) | ((X >> 10) & 0x00010000) |
| | ((Y >> 13) & 0x00002000) | ((Y >> 4) & 0x00001000) |
| | ((Y << 6) & 0x00000800) | ((Y >> 1) & 0x00000400) |
| | ((Y >> 14) & 0x00000200) | ((Y) & 0x00000100) |
| | ((Y >> 5) & 0x00000020) | ((Y >> 10) & 0x00000010) |
| | ((Y >> 3) & 0x00000008) | ((Y >> 18) & 0x00000004) |
| | ((Y >> 26) & 0x00000002) | ((Y >> 24) & 0x00000001); |
| |
| *SK++ = ((X << 15) & 0x20000000) | ((X << 17) & 0x10000000) |
| | ((X << 10) & 0x08000000) | ((X << 22) & 0x04000000) |
| | ((X >> 2) & 0x02000000) | ((X << 1) & 0x01000000) |
| | ((X << 16) & 0x00200000) | ((X << 11) & 0x00100000) |
| | ((X << 3) & 0x00080000) | ((X >> 6) & 0x00040000) |
| | ((X << 15) & 0x00020000) | ((X >> 4) & 0x00010000) |
| | ((Y >> 2) & 0x00002000) | ((Y << 8) & 0x00001000) |
| | ((Y >> 14) & 0x00000808) | ((Y >> 9) & 0x00000400) |
| | ((Y) & 0x00000200) | ((Y << 7) & 0x00000100) |
| | ((Y >> 7) & 0x00000020) | ((Y >> 3) & 0x00000011) |
| | ((Y << 2) & 0x00000004) | ((Y >> 21) & 0x00000002); |
| } |
| } |
| #endif /* !MBEDTLS_DES_SETKEY_ALT */ |
| |
| /* |
| * DES key schedule (56-bit, encryption) |
| */ |
| int mbedtls_des_setkey_enc(mbedtls_des_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE]) |
| { |
| mbedtls_des_setkey(ctx->sk, key); |
| |
| return 0; |
| } |
| |
| /* |
| * DES key schedule (56-bit, decryption) |
| */ |
| int mbedtls_des_setkey_dec(mbedtls_des_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE]) |
| { |
| int i; |
| |
| mbedtls_des_setkey(ctx->sk, key); |
| |
| for (i = 0; i < 16; i += 2) { |
| SWAP(ctx->sk[i], ctx->sk[30 - i]); |
| SWAP(ctx->sk[i + 1], ctx->sk[31 - i]); |
| } |
| |
| return 0; |
| } |
| |
| static void des3_set2key(uint32_t esk[96], |
| uint32_t dsk[96], |
| const unsigned char key[MBEDTLS_DES_KEY_SIZE*2]) |
| { |
| int i; |
| |
| mbedtls_des_setkey(esk, key); |
| mbedtls_des_setkey(dsk + 32, key + 8); |
| |
| for (i = 0; i < 32; i += 2) { |
| dsk[i] = esk[30 - i]; |
| dsk[i + 1] = esk[31 - i]; |
| |
| esk[i + 32] = dsk[62 - i]; |
| esk[i + 33] = dsk[63 - i]; |
| |
| esk[i + 64] = esk[i]; |
| esk[i + 65] = esk[i + 1]; |
| |
| dsk[i + 64] = dsk[i]; |
| dsk[i + 65] = dsk[i + 1]; |
| } |
| } |
| |
| /* |
| * Triple-DES key schedule (112-bit, encryption) |
| */ |
| int mbedtls_des3_set2key_enc(mbedtls_des3_context *ctx, |
| const unsigned char key[MBEDTLS_DES_KEY_SIZE * 2]) |
| { |
| uint32_t sk[96]; |
| |
| des3_set2key(ctx->sk, sk, key); |
| mbedtls_platform_zeroize(sk, sizeof(sk)); |
| |
| return 0; |
| } |
| |
| /* |
| * Triple-DES key schedule (112-bit, decryption) |
| */ |
| int mbedtls_des3_set2key_dec(mbedtls_des3_context *ctx, |
| const unsigned char key[MBEDTLS_DES_KEY_SIZE * 2]) |
| { |
| uint32_t sk[96]; |
| |
| des3_set2key(sk, ctx->sk, key); |
| mbedtls_platform_zeroize(sk, sizeof(sk)); |
| |
| return 0; |
| } |
| |
| static void des3_set3key(uint32_t esk[96], |
| uint32_t dsk[96], |
| const unsigned char key[24]) |
| { |
| int i; |
| |
| mbedtls_des_setkey(esk, key); |
| mbedtls_des_setkey(dsk + 32, key + 8); |
| mbedtls_des_setkey(esk + 64, key + 16); |
| |
| for (i = 0; i < 32; i += 2) { |
| dsk[i] = esk[94 - i]; |
| dsk[i + 1] = esk[95 - i]; |
| |
| esk[i + 32] = dsk[62 - i]; |
| esk[i + 33] = dsk[63 - i]; |
| |
| dsk[i + 64] = esk[30 - i]; |
| dsk[i + 65] = esk[31 - i]; |
| } |
| } |
| |
| /* |
| * Triple-DES key schedule (168-bit, encryption) |
| */ |
| int mbedtls_des3_set3key_enc(mbedtls_des3_context *ctx, |
| const unsigned char key[MBEDTLS_DES_KEY_SIZE * 3]) |
| { |
| uint32_t sk[96]; |
| |
| des3_set3key(ctx->sk, sk, key); |
| mbedtls_platform_zeroize(sk, sizeof(sk)); |
| |
| return 0; |
| } |
| |
| /* |
| * Triple-DES key schedule (168-bit, decryption) |
| */ |
| int mbedtls_des3_set3key_dec(mbedtls_des3_context *ctx, |
| const unsigned char key[MBEDTLS_DES_KEY_SIZE * 3]) |
| { |
| uint32_t sk[96]; |
| |
| des3_set3key(sk, ctx->sk, key); |
| mbedtls_platform_zeroize(sk, sizeof(sk)); |
| |
| return 0; |
| } |
| |
| /* |
| * DES-ECB block encryption/decryption |
| */ |
| #if !defined(MBEDTLS_DES_CRYPT_ECB_ALT) |
| int mbedtls_des_crypt_ecb(mbedtls_des_context *ctx, |
| const unsigned char input[8], |
| unsigned char output[8]) |
| { |
| int i; |
| uint32_t X, Y, T, *SK; |
| |
| SK = ctx->sk; |
| |
| X = MBEDTLS_GET_UINT32_BE(input, 0); |
| Y = MBEDTLS_GET_UINT32_BE(input, 4); |
| |
| DES_IP(X, Y); |
| |
| for (i = 0; i < 8; i++) { |
| DES_ROUND(Y, X); |
| DES_ROUND(X, Y); |
| } |
| |
| DES_FP(Y, X); |
| |
| MBEDTLS_PUT_UINT32_BE(Y, output, 0); |
| MBEDTLS_PUT_UINT32_BE(X, output, 4); |
| |
| return 0; |
| } |
| #endif /* !MBEDTLS_DES_CRYPT_ECB_ALT */ |
| |
| #if defined(MBEDTLS_CIPHER_MODE_CBC) |
| /* |
| * DES-CBC buffer encryption/decryption |
| */ |
| int mbedtls_des_crypt_cbc(mbedtls_des_context *ctx, |
| int mode, |
| size_t length, |
| unsigned char iv[8], |
| const unsigned char *input, |
| unsigned char *output) |
| { |
| int i; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| unsigned char temp[8]; |
| |
| if (length % 8) { |
| return MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH; |
| } |
| |
| if (mode == MBEDTLS_DES_ENCRYPT) { |
| while (length > 0) { |
| for (i = 0; i < 8; i++) { |
| output[i] = (unsigned char) (input[i] ^ iv[i]); |
| } |
| |
| ret = mbedtls_des_crypt_ecb(ctx, output, output); |
| if (ret != 0) { |
| goto exit; |
| } |
| memcpy(iv, output, 8); |
| |
| input += 8; |
| output += 8; |
| length -= 8; |
| } |
| } else { /* MBEDTLS_DES_DECRYPT */ |
| while (length > 0) { |
| memcpy(temp, input, 8); |
| ret = mbedtls_des_crypt_ecb(ctx, input, output); |
| if (ret != 0) { |
| goto exit; |
| } |
| |
| for (i = 0; i < 8; i++) { |
| output[i] = (unsigned char) (output[i] ^ iv[i]); |
| } |
| |
| memcpy(iv, temp, 8); |
| |
| input += 8; |
| output += 8; |
| length -= 8; |
| } |
| } |
| ret = 0; |
| |
| exit: |
| return ret; |
| } |
| #endif /* MBEDTLS_CIPHER_MODE_CBC */ |
| |
| /* |
| * 3DES-ECB block encryption/decryption |
| */ |
| #if !defined(MBEDTLS_DES3_CRYPT_ECB_ALT) |
| int mbedtls_des3_crypt_ecb(mbedtls_des3_context *ctx, |
| const unsigned char input[8], |
| unsigned char output[8]) |
| { |
| int i; |
| uint32_t X, Y, T, *SK; |
| |
| SK = ctx->sk; |
| |
| X = MBEDTLS_GET_UINT32_BE(input, 0); |
| Y = MBEDTLS_GET_UINT32_BE(input, 4); |
| |
| DES_IP(X, Y); |
| |
| for (i = 0; i < 8; i++) { |
| DES_ROUND(Y, X); |
| DES_ROUND(X, Y); |
| } |
| |
| for (i = 0; i < 8; i++) { |
| DES_ROUND(X, Y); |
| DES_ROUND(Y, X); |
| } |
| |
| for (i = 0; i < 8; i++) { |
| DES_ROUND(Y, X); |
| DES_ROUND(X, Y); |
| } |
| |
| DES_FP(Y, X); |
| |
| MBEDTLS_PUT_UINT32_BE(Y, output, 0); |
| MBEDTLS_PUT_UINT32_BE(X, output, 4); |
| |
| return 0; |
| } |
| #endif /* !MBEDTLS_DES3_CRYPT_ECB_ALT */ |
| |
| #if defined(MBEDTLS_CIPHER_MODE_CBC) |
| /* |
| * 3DES-CBC buffer encryption/decryption |
| */ |
| int mbedtls_des3_crypt_cbc(mbedtls_des3_context *ctx, |
| int mode, |
| size_t length, |
| unsigned char iv[8], |
| const unsigned char *input, |
| unsigned char *output) |
| { |
| int i; |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| unsigned char temp[8]; |
| |
| if (length % 8) { |
| return MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH; |
| } |
| |
| if (mode == MBEDTLS_DES_ENCRYPT) { |
| while (length > 0) { |
| for (i = 0; i < 8; i++) { |
| output[i] = (unsigned char) (input[i] ^ iv[i]); |
| } |
| |
| ret = mbedtls_des3_crypt_ecb(ctx, output, output); |
| if (ret != 0) { |
| goto exit; |
| } |
| memcpy(iv, output, 8); |
| |
| input += 8; |
| output += 8; |
| length -= 8; |
| } |
| } else { /* MBEDTLS_DES_DECRYPT */ |
| while (length > 0) { |
| memcpy(temp, input, 8); |
| ret = mbedtls_des3_crypt_ecb(ctx, input, output); |
| if (ret != 0) { |
| goto exit; |
| } |
| |
| for (i = 0; i < 8; i++) { |
| output[i] = (unsigned char) (output[i] ^ iv[i]); |
| } |
| |
| memcpy(iv, temp, 8); |
| |
| input += 8; |
| output += 8; |
| length -= 8; |
| } |
| } |
| ret = 0; |
| |
| exit: |
| return ret; |
| } |
| #endif /* MBEDTLS_CIPHER_MODE_CBC */ |
| |
| #endif /* !MBEDTLS_DES_ALT */ |
| |
| #if defined(MBEDTLS_SELF_TEST) |
| /* |
| * DES and 3DES test vectors from: |
| * |
| * http://csrc.nist.gov/groups/STM/cavp/documents/des/tripledes-vectors.zip |
| */ |
| static const unsigned char des3_test_keys[24] = |
| { |
| 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, |
| 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, |
| 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF, 0x01, 0x23 |
| }; |
| |
| static const unsigned char des3_test_buf[8] = |
| { |
| 0x4E, 0x6F, 0x77, 0x20, 0x69, 0x73, 0x20, 0x74 |
| }; |
| |
| static const unsigned char des3_test_ecb_dec[3][8] = |
| { |
| { 0x37, 0x2B, 0x98, 0xBF, 0x52, 0x65, 0xB0, 0x59 }, |
| { 0xC2, 0x10, 0x19, 0x9C, 0x38, 0x5A, 0x65, 0xA1 }, |
| { 0xA2, 0x70, 0x56, 0x68, 0x69, 0xE5, 0x15, 0x1D } |
| }; |
| |
| static const unsigned char des3_test_ecb_enc[3][8] = |
| { |
| { 0x1C, 0xD5, 0x97, 0xEA, 0x84, 0x26, 0x73, 0xFB }, |
| { 0xB3, 0x92, 0x4D, 0xF3, 0xC5, 0xB5, 0x42, 0x93 }, |
| { 0xDA, 0x37, 0x64, 0x41, 0xBA, 0x6F, 0x62, 0x6F } |
| }; |
| |
| #if defined(MBEDTLS_CIPHER_MODE_CBC) |
| static const unsigned char des3_test_iv[8] = |
| { |
| 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF, |
| }; |
| |
| static const unsigned char des3_test_cbc_dec[3][8] = |
| { |
| { 0x58, 0xD9, 0x48, 0xEF, 0x85, 0x14, 0x65, 0x9A }, |
| { 0x5F, 0xC8, 0x78, 0xD4, 0xD7, 0x92, 0xD9, 0x54 }, |
| { 0x25, 0xF9, 0x75, 0x85, 0xA8, 0x1E, 0x48, 0xBF } |
| }; |
| |
| static const unsigned char des3_test_cbc_enc[3][8] = |
| { |
| { 0x91, 0x1C, 0x6D, 0xCF, 0x48, 0xA7, 0xC3, 0x4D }, |
| { 0x60, 0x1A, 0x76, 0x8F, 0xA1, 0xF9, 0x66, 0xF1 }, |
| { 0xA1, 0x50, 0x0F, 0x99, 0xB2, 0xCD, 0x64, 0x76 } |
| }; |
| #endif /* MBEDTLS_CIPHER_MODE_CBC */ |
| |
| /* |
| * Checkup routine |
| */ |
| int mbedtls_des_self_test(int verbose) |
| { |
| int i, j, u, v, ret = 0; |
| mbedtls_des_context ctx; |
| mbedtls_des3_context ctx3; |
| unsigned char buf[8]; |
| #if defined(MBEDTLS_CIPHER_MODE_CBC) |
| unsigned char prv[8]; |
| unsigned char iv[8]; |
| #endif |
| |
| mbedtls_des_init(&ctx); |
| mbedtls_des3_init(&ctx3); |
| /* |
| * ECB mode |
| */ |
| for (i = 0; i < 6; i++) { |
| u = i >> 1; |
| v = i & 1; |
| |
| if (verbose != 0) { |
| mbedtls_printf(" DES%c-ECB-%3d (%s): ", |
| (u == 0) ? ' ' : '3', 56 + u * 56, |
| (v == MBEDTLS_DES_DECRYPT) ? "dec" : "enc"); |
| } |
| |
| memcpy(buf, des3_test_buf, 8); |
| |
| switch (i) { |
| case 0: |
| ret = mbedtls_des_setkey_dec(&ctx, des3_test_keys); |
| break; |
| |
| case 1: |
| ret = mbedtls_des_setkey_enc(&ctx, des3_test_keys); |
| break; |
| |
| case 2: |
| ret = mbedtls_des3_set2key_dec(&ctx3, des3_test_keys); |
| break; |
| |
| case 3: |
| ret = mbedtls_des3_set2key_enc(&ctx3, des3_test_keys); |
| break; |
| |
| case 4: |
| ret = mbedtls_des3_set3key_dec(&ctx3, des3_test_keys); |
| break; |
| |
| case 5: |
| ret = mbedtls_des3_set3key_enc(&ctx3, des3_test_keys); |
| break; |
| |
| default: |
| return 1; |
| } |
| if (ret != 0) { |
| goto exit; |
| } |
| |
| for (j = 0; j < 100; j++) { |
| if (u == 0) { |
| ret = mbedtls_des_crypt_ecb(&ctx, buf, buf); |
| } else { |
| ret = mbedtls_des3_crypt_ecb(&ctx3, buf, buf); |
| } |
| if (ret != 0) { |
| goto exit; |
| } |
| } |
| |
| if ((v == MBEDTLS_DES_DECRYPT && |
| memcmp(buf, des3_test_ecb_dec[u], 8) != 0) || |
| (v != MBEDTLS_DES_DECRYPT && |
| memcmp(buf, des3_test_ecb_enc[u], 8) != 0)) { |
| if (verbose != 0) { |
| mbedtls_printf("failed\n"); |
| } |
| |
| ret = 1; |
| goto exit; |
| } |
| |
| if (verbose != 0) { |
| mbedtls_printf("passed\n"); |
| } |
| } |
| |
| if (verbose != 0) { |
| mbedtls_printf("\n"); |
| } |
| |
| #if defined(MBEDTLS_CIPHER_MODE_CBC) |
| /* |
| * CBC mode |
| */ |
| for (i = 0; i < 6; i++) { |
| u = i >> 1; |
| v = i & 1; |
| |
| if (verbose != 0) { |
| mbedtls_printf(" DES%c-CBC-%3d (%s): ", |
| (u == 0) ? ' ' : '3', 56 + u * 56, |
| (v == MBEDTLS_DES_DECRYPT) ? "dec" : "enc"); |
| } |
| |
| memcpy(iv, des3_test_iv, 8); |
| memcpy(prv, des3_test_iv, 8); |
| memcpy(buf, des3_test_buf, 8); |
| |
| switch (i) { |
| case 0: |
| ret = mbedtls_des_setkey_dec(&ctx, des3_test_keys); |
| break; |
| |
| case 1: |
| ret = mbedtls_des_setkey_enc(&ctx, des3_test_keys); |
| break; |
| |
| case 2: |
| ret = mbedtls_des3_set2key_dec(&ctx3, des3_test_keys); |
| break; |
| |
| case 3: |
| ret = mbedtls_des3_set2key_enc(&ctx3, des3_test_keys); |
| break; |
| |
| case 4: |
| ret = mbedtls_des3_set3key_dec(&ctx3, des3_test_keys); |
| break; |
| |
| case 5: |
| ret = mbedtls_des3_set3key_enc(&ctx3, des3_test_keys); |
| break; |
| |
| default: |
| return 1; |
| } |
| if (ret != 0) { |
| goto exit; |
| } |
| |
| if (v == MBEDTLS_DES_DECRYPT) { |
| for (j = 0; j < 100; j++) { |
| if (u == 0) { |
| ret = mbedtls_des_crypt_cbc(&ctx, v, 8, iv, buf, buf); |
| } else { |
| ret = mbedtls_des3_crypt_cbc(&ctx3, v, 8, iv, buf, buf); |
| } |
| if (ret != 0) { |
| goto exit; |
| } |
| } |
| } else { |
| for (j = 0; j < 100; j++) { |
| unsigned char tmp[8]; |
| |
| if (u == 0) { |
| ret = mbedtls_des_crypt_cbc(&ctx, v, 8, iv, buf, buf); |
| } else { |
| ret = mbedtls_des3_crypt_cbc(&ctx3, v, 8, iv, buf, buf); |
| } |
| if (ret != 0) { |
| goto exit; |
| } |
| |
| memcpy(tmp, prv, 8); |
| memcpy(prv, buf, 8); |
| memcpy(buf, tmp, 8); |
| } |
| |
| memcpy(buf, prv, 8); |
| } |
| |
| if ((v == MBEDTLS_DES_DECRYPT && |
| memcmp(buf, des3_test_cbc_dec[u], 8) != 0) || |
| (v != MBEDTLS_DES_DECRYPT && |
| memcmp(buf, des3_test_cbc_enc[u], 8) != 0)) { |
| if (verbose != 0) { |
| mbedtls_printf("failed\n"); |
| } |
| |
| ret = 1; |
| goto exit; |
| } |
| |
| if (verbose != 0) { |
| mbedtls_printf("passed\n"); |
| } |
| } |
| #endif /* MBEDTLS_CIPHER_MODE_CBC */ |
| |
| if (verbose != 0) { |
| mbedtls_printf("\n"); |
| } |
| |
| exit: |
| mbedtls_des_free(&ctx); |
| mbedtls_des3_free(&ctx3); |
| |
| if (ret != 0) { |
| ret = 1; |
| } |
| return ret; |
| } |
| |
| #endif /* MBEDTLS_SELF_TEST */ |
| |
| #endif /* MBEDTLS_DES_C */ |