/* * FIPS-46-3 compliant Triple-DES implementation * * Copyright The Mbed TLS Contributors * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */ /* * 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 … /* * Final Permutation macro */ #define DES_FP … /* * DES round macro */ #define DES_ROUND … #define SWAP … 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 … 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 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) { mbedtls_xor(output, input, iv, 8); 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; } mbedtls_xor(output, output, iv, 8); 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 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) { mbedtls_xor(output, input, iv, 8); 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; } mbedtls_xor(output, output, iv, 8); 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 */
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