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| /* | |
| * An implementation of the CAMELLIA algorithm as mentioned in RFC3713 | |
| * Copyright (c) 2014 Supraja Meedinti | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * FFmpeg is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| static uint64_t SP[8][256]; | |
| typedef struct AVCAMELLIA { | |
| uint64_t Kw[4]; | |
| uint64_t Ke[6]; | |
| uint64_t K[24]; | |
| int key_bits; | |
| } AVCAMELLIA; | |
| static const uint8_t SBOX1[256] = { | |
| 112, 130, 44, 236, 179, 39, 192, 229, 228, 133, 87, 53, 234, 12, 174, 65, | |
| 35, 239, 107, 147, 69, 25, 165, 33, 237, 14, 79, 78, 29, 101, 146, 189, | |
| 134, 184, 175, 143, 124, 235, 31, 206, 62, 48, 220, 95, 94, 197, 11, 26, | |
| 166, 225, 57, 202, 213, 71, 93, 61, 217, 1, 90, 214, 81, 86, 108, 77, | |
| 139, 13, 154, 102, 251, 204, 176, 45, 116, 18, 43, 32, 240, 177, 132, 153, | |
| 223, 76, 203, 194, 52, 126, 118, 5, 109, 183, 169, 49, 209, 23, 4, 215, | |
| 20, 88, 58, 97, 222, 27, 17, 28, 50, 15, 156, 22, 83, 24, 242, 34, | |
| 254, 68, 207, 178, 195, 181, 122, 145, 36, 8, 232, 168, 96, 252, 105, 80, | |
| 170, 208, 160, 125, 161, 137, 98, 151, 84, 91, 30, 149, 224, 255, 100, 210, | |
| 16, 196, 0, 72, 163, 247, 117, 219, 138, 3, 230, 218, 9, 63, 221, 148, | |
| 135, 92, 131, 2, 205, 74, 144, 51, 115, 103, 246, 243, 157, 127, 191, 226, | |
| 82, 155, 216, 38, 200, 55, 198, 59, 129, 150, 111, 75, 19, 190, 99, 46, | |
| 233, 121, 167, 140, 159, 110, 188, 142, 41, 245, 249, 182, 47, 253, 180, 89, | |
| 120, 152, 6, 106, 231, 70, 113, 186, 212, 37, 171, 66, 136, 162, 141, 250, | |
| 114, 7, 185, 85, 248, 238, 172, 10, 54, 73, 42, 104, 60, 56, 241, 164, | |
| 64, 40, 211, 123, 187, 201, 67, 193, 21, 227, 173, 244, 119, 199, 128, 158 | |
| }; | |
| static const uint8_t SBOX2[256] = { | |
| 224, 5, 88, 217, 103, 78, 129, 203, 201, 11, 174, 106, 213, 24, 93, 130, | |
| 70, 223, 214, 39, 138, 50, 75, 66, 219, 28, 158, 156, 58, 202, 37, 123, | |
| 13, 113, 95, 31, 248, 215, 62, 157, 124, 96, 185, 190, 188, 139, 22, 52, | |
| 77, 195, 114, 149, 171, 142, 186, 122, 179, 2, 180, 173, 162, 172, 216, 154, | |
| 23, 26, 53, 204, 247, 153, 97, 90, 232, 36, 86, 64, 225, 99, 9, 51, | |
| 191, 152, 151, 133, 104, 252, 236, 10, 218, 111, 83, 98, 163, 46, 8, 175, | |
| 40, 176, 116, 194, 189, 54, 34, 56, 100, 30, 57, 44, 166, 48, 229, 68, | |
| 253, 136, 159, 101, 135, 107, 244, 35, 72, 16, 209, 81, 192, 249, 210, 160, | |
| 85, 161, 65, 250, 67, 19, 196, 47, 168, 182, 60, 43, 193, 255, 200, 165, | |
| 32, 137, 0, 144, 71, 239, 234, 183, 21, 6, 205, 181, 18, 126, 187, 41, | |
| 15, 184, 7, 4, 155, 148, 33, 102, 230, 206, 237, 231, 59, 254, 127, 197, | |
| 164, 55, 177, 76, 145, 110, 141, 118, 3, 45, 222, 150, 38, 125, 198, 92, | |
| 211, 242, 79, 25, 63, 220, 121, 29, 82, 235, 243, 109, 94, 251, 105, 178, | |
| 240, 49, 12, 212, 207, 140, 226, 117, 169, 74, 87, 132, 17, 69, 27, 245, | |
| 228, 14, 115, 170, 241, 221, 89, 20, 108, 146, 84, 208, 120, 112, 227, 73, | |
| 128, 80, 167, 246, 119, 147, 134, 131, 42, 199, 91, 233, 238, 143, 1, 61 | |
| }; | |
| static const uint8_t SBOX3[256] = { | |
| 56, 65, 22, 118, 217, 147, 96, 242, 114, 194, 171, 154, 117, 6, 87, 160, | |
| 145, 247, 181, 201, 162, 140, 210, 144, 246, 7, 167, 39, 142, 178, 73, 222, | |
| 67, 92, 215, 199, 62, 245, 143, 103, 31, 24, 110, 175, 47, 226, 133, 13, | |
| 83, 240, 156, 101, 234, 163, 174, 158, 236, 128, 45, 107, 168, 43, 54, 166, | |
| 197, 134, 77, 51, 253, 102, 88, 150, 58, 9, 149, 16, 120, 216, 66, 204, | |
| 239, 38, 229, 97, 26, 63, 59, 130, 182, 219, 212, 152, 232, 139, 2, 235, | |
| 10, 44, 29, 176, 111, 141, 136, 14, 25, 135, 78, 11, 169, 12, 121, 17, | |
| 127, 34, 231, 89, 225, 218, 61, 200, 18, 4, 116, 84, 48, 126, 180, 40, | |
| 85, 104, 80, 190, 208, 196, 49, 203, 42, 173, 15, 202, 112, 255, 50, 105, | |
| 8, 98, 0, 36, 209, 251, 186, 237, 69, 129, 115, 109, 132, 159, 238, 74, | |
| 195, 46, 193, 1, 230, 37, 72, 153, 185, 179, 123, 249, 206, 191, 223, 113, | |
| 41, 205, 108, 19, 100, 155, 99, 157, 192, 75, 183, 165, 137, 95, 177, 23, | |
| 244, 188, 211, 70, 207, 55, 94, 71, 148, 250, 252, 91, 151, 254, 90, 172, | |
| 60, 76, 3, 53, 243, 35, 184, 93, 106, 146, 213, 33, 68, 81, 198, 125, | |
| 57, 131, 220, 170, 124, 119, 86, 5, 27, 164, 21, 52, 30, 28, 248, 82, | |
| 32, 20, 233, 189, 221, 228, 161, 224, 138, 241, 214, 122, 187, 227, 64, 79 | |
| }; | |
| static const uint8_t SBOX4[256] = { | |
| 112, 44, 179, 192, 228, 87, 234, 174, 35, 107, 69, 165, 237, 79, 29, 146, | |
| 134, 175, 124, 31, 62, 220, 94, 11, 166, 57, 213, 93, 217, 90, 81, 108, | |
| 139, 154, 251, 176, 116, 43, 240, 132, 223, 203, 52, 118, 109, 169, 209, 4, | |
| 20, 58, 222, 17, 50, 156, 83, 242, 254, 207, 195, 122, 36, 232, 96, 105, | |
| 170, 160, 161, 98, 84, 30, 224, 100, 16, 0, 163, 117, 138, 230, 9, 221, | |
| 135, 131, 205, 144, 115, 246, 157, 191, 82, 216, 200, 198, 129, 111, 19, 99, | |
| 233, 167, 159, 188, 41, 249, 47, 180, 120, 6, 231, 113, 212, 171, 136, 141, | |
| 114, 185, 248, 172, 54, 42, 60, 241, 64, 211, 187, 67, 21, 173, 119, 128, | |
| 130, 236, 39, 229, 133, 53, 12, 65, 239, 147, 25, 33, 14, 78, 101, 189, | |
| 184, 143, 235, 206, 48, 95, 197, 26, 225, 202, 71, 61, 1, 214, 86, 77, | |
| 13, 102, 204, 45, 18, 32, 177, 153, 76, 194, 126, 5, 183, 49, 23, 215, | |
| 88, 97, 27, 28, 15, 22, 24, 34, 68, 178, 181, 145, 8, 168, 252, 80, | |
| 208, 125, 137, 151, 91, 149, 255, 210, 196, 72, 247, 219, 3, 218, 63, 148, | |
| 92, 2, 74, 51, 103, 243, 127, 226, 155, 38, 55, 59, 150, 75, 190, 46, | |
| 121, 140, 110, 142, 245, 182, 253, 89, 152, 106, 70, 186, 37, 66, 162, 250, | |
| 7, 85, 238, 10, 73, 104, 56, 164, 40, 123, 201, 193, 227, 244, 199, 158 | |
| }; | |
| const int av_camellia_size = sizeof(AVCAMELLIA); | |
| static void LR128(uint64_t d[2], const uint64_t K[2], int x) | |
| { | |
| int i = 0; | |
| if (64 <= x && x < 128) { | |
| i = 1; | |
| x -= 64; | |
| } | |
| if (x <= 0 || x >= 128) { | |
| d[0] = K[i]; | |
| d[1] = K[!i]; | |
| return; | |
| } | |
| d[0] = (K[i] << x | K[!i] >> (64 - x)); | |
| d[1] = (K[!i] << x | K[i] >> (64 - x)); | |
| } | |
| static uint64_t F(uint64_t F_IN, uint64_t KE) | |
| { | |
| KE ^= F_IN; | |
| F_IN=SP[0][KE >> 56]^SP[1][(KE >> 48) & MASK8]^SP[2][(KE >> 40) & MASK8]^SP[3][(KE >> 32) & MASK8]^SP[4][(KE >> 24) & MASK8]^SP[5][(KE >> 16) & MASK8]^SP[6][(KE >> 8) & MASK8]^SP[7][KE & MASK8]; | |
| return F_IN; | |
| } | |
| static uint64_t FL(uint64_t FL_IN, uint64_t KE) | |
| { | |
| uint32_t x1, x2, k1, k2; | |
| x1 = FL_IN >> 32; | |
| x2 = FL_IN & MASK32; | |
| k1 = KE >> 32; | |
| k2 = KE & MASK32; | |
| x2 = x2 ^ LR32((x1 & k1), 1); | |
| x1 = x1 ^ (x2 | k2); | |
| return ((uint64_t)x1 << 32) | (uint64_t)x2; | |
| } | |
| static uint64_t FLINV(uint64_t FLINV_IN, uint64_t KE) | |
| { | |
| uint32_t x1, x2, k1, k2; | |
| x1 = FLINV_IN >> 32; | |
| x2 = FLINV_IN & MASK32; | |
| k1 = KE >> 32; | |
| k2 = KE & MASK32; | |
| x1 = x1 ^ (x2 | k2); | |
| x2 = x2 ^ LR32((x1 & k1), 1); | |
| return ((uint64_t)x1 << 32) | (uint64_t)x2; | |
| } | |
| static const uint8_t shifts[2][12] = { | |
| {0, 15, 15, 45, 45, 60, 94, 94, 111}, | |
| {0, 15, 15, 30, 45, 45, 60, 60, 77, 94, 94, 111} | |
| }; | |
| static const uint8_t vars[2][12] = { | |
| {2, 0, 2, 0, 2, 2, 0, 2, 0}, | |
| {3, 1, 2, 3, 0, 2, 1, 3, 0, 1, 2, 0} | |
| }; | |
| static void generate_round_keys(AVCAMELLIA *cs, uint64_t Kl[2], uint64_t Kr[2], uint64_t Ka[2], uint64_t Kb[2]) | |
| { | |
| int i; | |
| uint64_t *Kd[4], d[2]; | |
| Kd[0] = Kl; | |
| Kd[1] = Kr; | |
| Kd[2] = Ka; | |
| Kd[3] = Kb; | |
| cs->Kw[0] = Kl[0]; | |
| cs->Kw[1] = Kl[1]; | |
| if (cs->key_bits == 128) { | |
| for (i = 0; i < 9; i++) { | |
| LR128(d, Kd[vars[0][i]], shifts[0][i]); | |
| cs->K[2*i] = d[0]; | |
| cs->K[2*i+1] = d[1]; | |
| } | |
| LR128(d, Kd[0], 60); | |
| cs->K[9] = d[1]; | |
| LR128(d, Kd[2], 30); | |
| cs->Ke[0] = d[0]; | |
| cs->Ke[1] = d[1]; | |
| LR128(d, Kd[0], 77); | |
| cs->Ke[2] = d[0]; | |
| cs->Ke[3] = d[1]; | |
| LR128(d, Kd[2], 111); | |
| cs->Kw[2] = d[0]; | |
| cs->Kw[3] = d[1]; | |
| } else { | |
| for (i = 0; i < 12; i++) { | |
| LR128(d, Kd[vars[1][i]], shifts[1][i]); | |
| cs->K[2*i] = d[0]; | |
| cs->K[2*i+1] = d[1]; | |
| } | |
| LR128(d, Kd[1], 30); | |
| cs->Ke[0] = d[0]; | |
| cs->Ke[1] = d[1]; | |
| LR128(d, Kd[0], 60); | |
| cs->Ke[2] = d[0]; | |
| cs->Ke[3] = d[1]; | |
| LR128(d, Kd[2], 77); | |
| cs->Ke[4] = d[0]; | |
| cs->Ke[5] = d[1]; | |
| LR128(d, Kd[3], 111); | |
| cs->Kw[2] = d[0]; | |
| cs->Kw[3] = d[1]; | |
| } | |
| } | |
| static void camellia_encrypt(AVCAMELLIA *cs, uint8_t *dst, const uint8_t *src) | |
| { | |
| uint64_t D1, D2; | |
| D1 = AV_RB64(src); | |
| D2 = AV_RB64(src + 8); | |
| D1 ^= cs->Kw[0]; | |
| D2 ^= cs->Kw[1]; | |
| D2 ^= F(D1, cs->K[0]); | |
| D1 ^= F(D2, cs->K[1]); | |
| D2 ^= F(D1, cs->K[2]); | |
| D1 ^= F(D2, cs->K[3]); | |
| D2 ^= F(D1, cs->K[4]); | |
| D1 ^= F(D2, cs->K[5]); | |
| D1 = FL(D1, cs->Ke[0]); | |
| D2 = FLINV(D2, cs->Ke[1]); | |
| D2 ^= F(D1, cs->K[6]); | |
| D1 ^= F(D2, cs->K[7]); | |
| D2 ^= F(D1, cs->K[8]); | |
| D1 ^= F(D2, cs->K[9]); | |
| D2 ^= F(D1, cs->K[10]); | |
| D1 ^= F(D2, cs->K[11]); | |
| D1 = FL(D1, cs->Ke[2]); | |
| D2 = FLINV(D2, cs->Ke[3]); | |
| D2 ^= F(D1, cs->K[12]); | |
| D1 ^= F(D2, cs->K[13]); | |
| D2 ^= F(D1, cs->K[14]); | |
| D1 ^= F(D2, cs->K[15]); | |
| D2 ^= F(D1, cs->K[16]); | |
| D1 ^= F(D2, cs->K[17]); | |
| if (cs->key_bits != 128) { | |
| D1 = FL(D1, cs->Ke[4]); | |
| D2 = FLINV(D2, cs->Ke[5]); | |
| D2 ^= F(D1, cs->K[18]); | |
| D1 ^= F(D2, cs->K[19]); | |
| D2 ^= F(D1, cs->K[20]); | |
| D1 ^= F(D2, cs->K[21]); | |
| D2 ^= F(D1, cs->K[22]); | |
| D1 ^= F(D2, cs->K[23]); | |
| } | |
| D2 ^= cs->Kw[2]; | |
| D1 ^= cs->Kw[3]; | |
| AV_WB64(dst, D2); | |
| AV_WB64(dst + 8, D1); | |
| } | |
| static void camellia_decrypt(AVCAMELLIA *cs, uint8_t *dst, const uint8_t *src, uint8_t *iv) | |
| { | |
| uint64_t D1, D2; | |
| D1 = AV_RB64(src); | |
| D2 = AV_RB64(src + 8); | |
| D1 ^= cs->Kw[2]; | |
| D2 ^= cs->Kw[3]; | |
| if (cs->key_bits != 128) { | |
| D2 ^= F(D1, cs->K[23]); | |
| D1 ^= F(D2, cs->K[22]); | |
| D2 ^= F(D1, cs->K[21]); | |
| D1 ^= F(D2, cs->K[20]); | |
| D2 ^= F(D1, cs->K[19]); | |
| D1 ^= F(D2, cs->K[18]); | |
| D1 = FL(D1, cs->Ke[5]); | |
| D2 = FLINV(D2, cs->Ke[4]); | |
| } | |
| D2 ^= F(D1, cs->K[17]); | |
| D1 ^= F(D2, cs->K[16]); | |
| D2 ^= F(D1, cs->K[15]); | |
| D1 ^= F(D2, cs->K[14]); | |
| D2 ^= F(D1, cs->K[13]); | |
| D1 ^= F(D2, cs->K[12]); | |
| D1 = FL(D1, cs->Ke[3]); | |
| D2 = FLINV(D2, cs->Ke[2]); | |
| D2 ^= F(D1, cs->K[11]); | |
| D1 ^= F(D2, cs->K[10]); | |
| D2 ^= F(D1, cs->K[9]); | |
| D1 ^= F(D2, cs->K[8]); | |
| D2 ^= F(D1, cs->K[7]); | |
| D1 ^= F(D2, cs->K[6]); | |
| D1 = FL(D1, cs->Ke[1]); | |
| D2 = FLINV(D2, cs->Ke[0]); | |
| D2 ^= F(D1, cs->K[5]); | |
| D1 ^= F(D2, cs->K[4]); | |
| D2 ^= F(D1, cs->K[3]); | |
| D1 ^= F(D2, cs->K[2]); | |
| D2 ^= F(D1, cs->K[1]); | |
| D1 ^= F(D2, cs->K[0]); | |
| D2 ^= cs->Kw[0]; | |
| D1 ^= cs->Kw[1]; | |
| if (iv) { | |
| D2 ^= AV_RB64(iv); | |
| D1 ^= AV_RB64(iv + 8); | |
| memcpy(iv, src, 16); | |
| } | |
| AV_WB64(dst, D2); | |
| AV_WB64(dst + 8, D1); | |
| } | |
| static void computeSP(void) | |
| { | |
| uint64_t z; | |
| int i; | |
| for (i = 0; i < 256; i++) { | |
| z = SBOX1[i]; | |
| SP[0][i] = (z << 56) ^ (z << 48) ^ (z << 40) ^ (z << 24) ^ z; | |
| SP[7][i] = (z << 56) ^ (z << 48) ^ (z << 40) ^ (z << 24) ^ (z << 16) ^ (z << 8); | |
| z = SBOX2[i]; | |
| SP[1][i] = (z << 48) ^ (z << 40) ^ (z << 32) ^ (z << 24) ^ (z << 16); | |
| SP[4][i] = (z << 48) ^ (z << 40) ^ (z << 32) ^ (z << 16) ^ (z << 8) ^ z; | |
| z = SBOX3[i]; | |
| SP[2][i] = (z << 56) ^ (z << 40) ^ (z << 32) ^ (z << 16) ^ (z << 8); | |
| SP[5][i] = (z << 56) ^ (z << 40) ^ (z << 32) ^ (z << 24) ^ (z << 8) ^ z; | |
| z = SBOX4[i]; | |
| SP[3][i] = (z << 56) ^ (z << 48) ^ (z << 32) ^ (z << 8) ^ z; | |
| SP[6][i] = (z << 56) ^ (z << 48) ^ (z << 32) ^ (z << 24) ^ (z << 16) ^ z; | |
| } | |
| } | |
| struct AVCAMELLIA *av_camellia_alloc(void) | |
| { | |
| return av_mallocz(sizeof(struct AVCAMELLIA)); | |
| } | |
| av_cold int av_camellia_init(AVCAMELLIA *cs, const uint8_t *key, int key_bits) | |
| { | |
| uint64_t Kl[2], Kr[2], Ka[2], Kb[2]; | |
| uint64_t D1, D2; | |
| if (key_bits != 128 && key_bits != 192 && key_bits != 256) | |
| return AVERROR(EINVAL); | |
| memset(Kb, 0, sizeof(Kb)); | |
| memset(Kr, 0, sizeof(Kr)); | |
| cs->key_bits = key_bits; | |
| Kl[0] = AV_RB64(key); | |
| Kl[1] = AV_RB64(key + 8); | |
| if (key_bits == 192) { | |
| Kr[0] = AV_RB64(key + 16); | |
| Kr[1] = ~Kr[0]; | |
| } else if (key_bits == 256) { | |
| Kr[0] = AV_RB64(key + 16); | |
| Kr[1] = AV_RB64(key + 24); | |
| } | |
| computeSP(); | |
| D1 = Kl[0] ^ Kr[0]; | |
| D2 = Kl[1] ^ Kr[1]; | |
| D2 ^= F(D1, Sigma1); | |
| D1 ^= F(D2, Sigma2); | |
| D1 ^= Kl[0]; | |
| D2 ^= Kl[1]; | |
| D2 ^= F(D1, Sigma3); | |
| D1 ^= F(D2, Sigma4); | |
| Ka[0] = D1; | |
| Ka[1] = D2; | |
| if (key_bits != 128) { | |
| D1 = Ka[0] ^ Kr[0]; | |
| D2 = Ka[1] ^ Kr[1]; | |
| D2 ^= F(D1, Sigma5); | |
| D1 ^= F(D2, Sigma6); | |
| Kb[0] = D1; | |
| Kb[1] = D2; | |
| } | |
| generate_round_keys(cs, Kl, Kr, Ka, Kb); | |
| return 0; | |
| } | |
| void av_camellia_crypt(AVCAMELLIA *cs, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt) | |
| { | |
| int i; | |
| while (count--) { | |
| if (decrypt) { | |
| camellia_decrypt(cs, dst, src, iv); | |
| } else { | |
| if (iv) { | |
| for (i = 0; i < 16; i++) | |
| dst[i] = src[i] ^ iv[i]; | |
| camellia_encrypt(cs, dst, dst); | |
| memcpy(iv, dst, 16); | |
| } else { | |
| camellia_encrypt(cs, dst, src); | |
| } | |
| } | |
| src = src + 16; | |
| dst = dst + 16; | |
| } | |
| } | |