| /* |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you 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. |
| */ |
| |
| /* AES Encryption */ |
| |
| package amcl |
| |
| //import "fmt" |
| |
| const AES_ECB int=0 |
| const AES_CBC int=1 |
| const AES_CFB1 int=2 |
| const AES_CFB2 int=3 |
| const AES_CFB4 int=5 |
| const AES_OFB1 int=14 |
| const AES_OFB2 int=15 |
| const AES_OFB4 int=17 |
| const AES_OFB8 int=21 |
| const AES_OFB16 int=29 |
| const AES_CTR1 int=30 |
| const AES_CTR2 int=31 |
| const AES_CTR4 int=33 |
| const AES_CTR8 int=37 |
| const AES_CTR16 int=45 |
| |
| var aes_InCo = [...]byte {0xB,0xD,0x9,0xE} /* Inverse Coefficients */ |
| |
| var aes_ptab = [...]byte { |
| 1, 3, 5, 15, 17, 51, 85, 255, 26, 46, 114, 150, 161, 248, 19, 53, |
| 95, 225, 56, 72, 216, 115, 149, 164, 247, 2, 6, 10, 30, 34, 102, 170, |
| 229, 52, 92, 228, 55, 89, 235, 38, 106, 190, 217, 112, 144, 171, 230, 49, |
| 83, 245, 4, 12, 20, 60, 68, 204, 79, 209, 104, 184, 211, 110, 178, 205, |
| 76, 212, 103, 169, 224, 59, 77, 215, 98, 166, 241, 8, 24, 40, 120, 136, |
| 131, 158, 185, 208, 107, 189, 220, 127, 129, 152, 179, 206, 73, 219, 118, 154, |
| 181, 196, 87, 249, 16, 48, 80, 240, 11, 29, 39, 105, 187, 214, 97, 163, |
| 254, 25, 43, 125, 135, 146, 173, 236, 47, 113, 147, 174, 233, 32, 96, 160, |
| 251, 22, 58, 78, 210, 109, 183, 194, 93, 231, 50, 86, 250, 21, 63, 65, |
| 195, 94, 226, 61, 71, 201, 64, 192, 91, 237, 44, 116, 156, 191, 218, 117, |
| 159, 186, 213, 100, 172, 239, 42, 126, 130, 157, 188, 223, 122, 142, 137, 128, |
| 155, 182, 193, 88, 232, 35, 101, 175, 234, 37, 111, 177, 200, 67, 197, 84, |
| 252, 31, 33, 99, 165, 244, 7, 9, 27, 45, 119, 153, 176, 203, 70, 202, |
| 69, 207, 74, 222, 121, 139, 134, 145, 168, 227, 62, 66, 198, 81, 243, 14, |
| 18, 54, 90, 238, 41, 123, 141, 140, 143, 138, 133, 148, 167, 242, 13, 23, |
| 57, 75, 221, 124, 132, 151, 162, 253, 28, 36, 108, 180, 199, 82, 246, 1} |
| |
| var aes_ltab = [...]byte { |
| 0, 255, 25, 1, 50, 2, 26, 198, 75, 199, 27, 104, 51, 238, 223, 3, |
| 100, 4, 224, 14, 52, 141, 129, 239, 76, 113, 8, 200, 248, 105, 28, 193, |
| 125, 194, 29, 181, 249, 185, 39, 106, 77, 228, 166, 114, 154, 201, 9, 120, |
| 101, 47, 138, 5, 33, 15, 225, 36, 18, 240, 130, 69, 53, 147, 218, 142, |
| 150, 143, 219, 189, 54, 208, 206, 148, 19, 92, 210, 241, 64, 70, 131, 56, |
| 102, 221, 253, 48, 191, 6, 139, 98, 179, 37, 226, 152, 34, 136, 145, 16, |
| 126, 110, 72, 195, 163, 182, 30, 66, 58, 107, 40, 84, 250, 133, 61, 186, |
| 43, 121, 10, 21, 155, 159, 94, 202, 78, 212, 172, 229, 243, 115, 167, 87, |
| 175, 88, 168, 80, 244, 234, 214, 116, 79, 174, 233, 213, 231, 230, 173, 232, |
| 44, 215, 117, 122, 235, 22, 11, 245, 89, 203, 95, 176, 156, 169, 81, 160, |
| 127, 12, 246, 111, 23, 196, 73, 236, 216, 67, 31, 45, 164, 118, 123, 183, |
| 204, 187, 62, 90, 251, 96, 177, 134, 59, 82, 161, 108, 170, 85, 41, 157, |
| 151, 178, 135, 144, 97, 190, 220, 252, 188, 149, 207, 205, 55, 63, 91, 209, |
| 83, 57, 132, 60, 65, 162, 109, 71, 20, 42, 158, 93, 86, 242, 211, 171, |
| 68, 17, 146, 217, 35, 32, 46, 137, 180, 124, 184, 38, 119, 153, 227, 165, |
| 103, 74, 237, 222, 197, 49, 254, 24, 13, 99, 140, 128, 192, 247, 112, 7} |
| |
| |
| var aes_fbsub = [...]byte { |
| 99, 124, 119, 123, 242, 107, 111, 197, 48, 1, 103, 43, 254, 215, 171, 118, |
| 202, 130, 201, 125, 250, 89, 71, 240, 173, 212, 162, 175, 156, 164, 114, 192, |
| 183, 253, 147, 38, 54, 63, 247, 204, 52, 165, 229, 241, 113, 216, 49, 21, |
| 4, 199, 35, 195, 24, 150, 5, 154, 7, 18, 128, 226, 235, 39, 178, 117, |
| 9, 131, 44, 26, 27, 110, 90, 160, 82, 59, 214, 179, 41, 227, 47, 132, |
| 83, 209, 0, 237, 32, 252, 177, 91, 106, 203, 190, 57, 74, 76, 88, 207, |
| 208, 239, 170, 251, 67, 77, 51, 133, 69, 249, 2, 127, 80, 60, 159, 168, |
| 81, 163, 64, 143, 146, 157, 56, 245, 188, 182, 218, 33, 16, 255, 243, 210, |
| 205, 12, 19, 236, 95, 151, 68, 23, 196, 167, 126, 61, 100, 93, 25, 115, |
| 96, 129, 79, 220, 34, 42, 144, 136, 70, 238, 184, 20, 222, 94, 11, 219, |
| 224, 50, 58, 10, 73, 6, 36, 92, 194, 211, 172, 98, 145, 149, 228, 121, |
| 231, 200, 55, 109, 141, 213, 78, 169, 108, 86, 244, 234, 101, 122, 174, 8, |
| 186, 120, 37, 46, 28, 166, 180, 198, 232, 221, 116, 31, 75, 189, 139, 138, |
| 112, 62, 181, 102, 72, 3, 246, 14, 97, 53, 87, 185, 134, 193, 29, 158, |
| 225, 248, 152, 17, 105, 217, 142, 148, 155, 30, 135, 233, 206, 85, 40, 223, |
| 140, 161, 137, 13, 191, 230, 66, 104, 65, 153, 45, 15, 176, 84, 187, 22} |
| |
| var aes_rbsub = [...]byte { |
| 82, 9, 106, 213, 48, 54, 165, 56, 191, 64, 163, 158, 129, 243, 215, 251, |
| 124, 227, 57, 130, 155, 47, 255, 135, 52, 142, 67, 68, 196, 222, 233, 203, |
| 84, 123, 148, 50, 166, 194, 35, 61, 238, 76, 149, 11, 66, 250, 195, 78, |
| 8, 46, 161, 102, 40, 217, 36, 178, 118, 91, 162, 73, 109, 139, 209, 37, |
| 114, 248, 246, 100, 134, 104, 152, 22, 212, 164, 92, 204, 93, 101, 182, 146, |
| 108, 112, 72, 80, 253, 237, 185, 218, 94, 21, 70, 87, 167, 141, 157, 132, |
| 144, 216, 171, 0, 140, 188, 211, 10, 247, 228, 88, 5, 184, 179, 69, 6, |
| 208, 44, 30, 143, 202, 63, 15, 2, 193, 175, 189, 3, 1, 19, 138, 107, |
| 58, 145, 17, 65, 79, 103, 220, 234, 151, 242, 207, 206, 240, 180, 230, 115, |
| 150, 172, 116, 34, 231, 173, 53, 133, 226, 249, 55, 232, 28, 117, 223, 110, |
| 71, 241, 26, 113, 29, 41, 197, 137, 111, 183, 98, 14, 170, 24, 190, 27, |
| 252, 86, 62, 75, 198, 210, 121, 32, 154, 219, 192, 254, 120, 205, 90, 244, |
| 31, 221, 168, 51, 136, 7, 199, 49, 177, 18, 16, 89, 39, 128, 236, 95, |
| 96, 81, 127, 169, 25, 181, 74, 13, 45, 229, 122, 159, 147, 201, 156, 239, |
| 160, 224, 59, 77, 174, 42, 245, 176, 200, 235, 187, 60, 131, 83, 153, 97, |
| 23, 43, 4, 126, 186, 119, 214, 38, 225, 105, 20, 99, 85, 33, 12, 125} |
| |
| |
| var aes_rco = [...]byte {1,2,4,8,16,32,64,128,27,54,108,216,171,77,154,47} |
| |
| var aes_ftable = [...]uint32 { |
| 0xa56363c6,0x847c7cf8,0x997777ee,0x8d7b7bf6,0xdf2f2ff,0xbd6b6bd6, |
| 0xb16f6fde,0x54c5c591,0x50303060,0x3010102,0xa96767ce,0x7d2b2b56, |
| 0x19fefee7,0x62d7d7b5,0xe6abab4d,0x9a7676ec,0x45caca8f,0x9d82821f, |
| 0x40c9c989,0x877d7dfa,0x15fafaef,0xeb5959b2,0xc947478e,0xbf0f0fb, |
| 0xecadad41,0x67d4d4b3,0xfda2a25f,0xeaafaf45,0xbf9c9c23,0xf7a4a453, |
| 0x967272e4,0x5bc0c09b,0xc2b7b775,0x1cfdfde1,0xae93933d,0x6a26264c, |
| 0x5a36366c,0x413f3f7e,0x2f7f7f5,0x4fcccc83,0x5c343468,0xf4a5a551, |
| 0x34e5e5d1,0x8f1f1f9,0x937171e2,0x73d8d8ab,0x53313162,0x3f15152a, |
| 0xc040408,0x52c7c795,0x65232346,0x5ec3c39d,0x28181830,0xa1969637, |
| 0xf05050a,0xb59a9a2f,0x907070e,0x36121224,0x9b80801b,0x3de2e2df, |
| 0x26ebebcd,0x6927274e,0xcdb2b27f,0x9f7575ea,0x1b090912,0x9e83831d, |
| 0x742c2c58,0x2e1a1a34,0x2d1b1b36,0xb26e6edc,0xee5a5ab4,0xfba0a05b, |
| 0xf65252a4,0x4d3b3b76,0x61d6d6b7,0xceb3b37d,0x7b292952,0x3ee3e3dd, |
| 0x712f2f5e,0x97848413,0xf55353a6,0x68d1d1b9,0x0,0x2cededc1, |
| 0x60202040,0x1ffcfce3,0xc8b1b179,0xed5b5bb6,0xbe6a6ad4,0x46cbcb8d, |
| 0xd9bebe67,0x4b393972,0xde4a4a94,0xd44c4c98,0xe85858b0,0x4acfcf85, |
| 0x6bd0d0bb,0x2aefefc5,0xe5aaaa4f,0x16fbfbed,0xc5434386,0xd74d4d9a, |
| 0x55333366,0x94858511,0xcf45458a,0x10f9f9e9,0x6020204,0x817f7ffe, |
| 0xf05050a0,0x443c3c78,0xba9f9f25,0xe3a8a84b,0xf35151a2,0xfea3a35d, |
| 0xc0404080,0x8a8f8f05,0xad92923f,0xbc9d9d21,0x48383870,0x4f5f5f1, |
| 0xdfbcbc63,0xc1b6b677,0x75dadaaf,0x63212142,0x30101020,0x1affffe5, |
| 0xef3f3fd,0x6dd2d2bf,0x4ccdcd81,0x140c0c18,0x35131326,0x2fececc3, |
| 0xe15f5fbe,0xa2979735,0xcc444488,0x3917172e,0x57c4c493,0xf2a7a755, |
| 0x827e7efc,0x473d3d7a,0xac6464c8,0xe75d5dba,0x2b191932,0x957373e6, |
| 0xa06060c0,0x98818119,0xd14f4f9e,0x7fdcdca3,0x66222244,0x7e2a2a54, |
| 0xab90903b,0x8388880b,0xca46468c,0x29eeeec7,0xd3b8b86b,0x3c141428, |
| 0x79dedea7,0xe25e5ebc,0x1d0b0b16,0x76dbdbad,0x3be0e0db,0x56323264, |
| 0x4e3a3a74,0x1e0a0a14,0xdb494992,0xa06060c,0x6c242448,0xe45c5cb8, |
| 0x5dc2c29f,0x6ed3d3bd,0xefacac43,0xa66262c4,0xa8919139,0xa4959531, |
| 0x37e4e4d3,0x8b7979f2,0x32e7e7d5,0x43c8c88b,0x5937376e,0xb76d6dda, |
| 0x8c8d8d01,0x64d5d5b1,0xd24e4e9c,0xe0a9a949,0xb46c6cd8,0xfa5656ac, |
| 0x7f4f4f3,0x25eaeacf,0xaf6565ca,0x8e7a7af4,0xe9aeae47,0x18080810, |
| 0xd5baba6f,0x887878f0,0x6f25254a,0x722e2e5c,0x241c1c38,0xf1a6a657, |
| 0xc7b4b473,0x51c6c697,0x23e8e8cb,0x7cdddda1,0x9c7474e8,0x211f1f3e, |
| 0xdd4b4b96,0xdcbdbd61,0x868b8b0d,0x858a8a0f,0x907070e0,0x423e3e7c, |
| 0xc4b5b571,0xaa6666cc,0xd8484890,0x5030306,0x1f6f6f7,0x120e0e1c, |
| 0xa36161c2,0x5f35356a,0xf95757ae,0xd0b9b969,0x91868617,0x58c1c199, |
| 0x271d1d3a,0xb99e9e27,0x38e1e1d9,0x13f8f8eb,0xb398982b,0x33111122, |
| 0xbb6969d2,0x70d9d9a9,0x898e8e07,0xa7949433,0xb69b9b2d,0x221e1e3c, |
| 0x92878715,0x20e9e9c9,0x49cece87,0xff5555aa,0x78282850,0x7adfdfa5, |
| 0x8f8c8c03,0xf8a1a159,0x80898909,0x170d0d1a,0xdabfbf65,0x31e6e6d7, |
| 0xc6424284,0xb86868d0,0xc3414182,0xb0999929,0x772d2d5a,0x110f0f1e, |
| 0xcbb0b07b,0xfc5454a8,0xd6bbbb6d,0x3a16162c} |
| |
| var aes_rtable = [...]uint32 { |
| 0x50a7f451,0x5365417e,0xc3a4171a,0x965e273a,0xcb6bab3b,0xf1459d1f, |
| 0xab58faac,0x9303e34b,0x55fa3020,0xf66d76ad,0x9176cc88,0x254c02f5, |
| 0xfcd7e54f,0xd7cb2ac5,0x80443526,0x8fa362b5,0x495ab1de,0x671bba25, |
| 0x980eea45,0xe1c0fe5d,0x2752fc3,0x12f04c81,0xa397468d,0xc6f9d36b, |
| 0xe75f8f03,0x959c9215,0xeb7a6dbf,0xda595295,0x2d83bed4,0xd3217458, |
| 0x2969e049,0x44c8c98e,0x6a89c275,0x78798ef4,0x6b3e5899,0xdd71b927, |
| 0xb64fe1be,0x17ad88f0,0x66ac20c9,0xb43ace7d,0x184adf63,0x82311ae5, |
| 0x60335197,0x457f5362,0xe07764b1,0x84ae6bbb,0x1ca081fe,0x942b08f9, |
| 0x58684870,0x19fd458f,0x876cde94,0xb7f87b52,0x23d373ab,0xe2024b72, |
| 0x578f1fe3,0x2aab5566,0x728ebb2,0x3c2b52f,0x9a7bc586,0xa50837d3, |
| 0xf2872830,0xb2a5bf23,0xba6a0302,0x5c8216ed,0x2b1ccf8a,0x92b479a7, |
| 0xf0f207f3,0xa1e2694e,0xcdf4da65,0xd5be0506,0x1f6234d1,0x8afea6c4, |
| 0x9d532e34,0xa055f3a2,0x32e18a05,0x75ebf6a4,0x39ec830b,0xaaef6040, |
| 0x69f715e,0x51106ebd,0xf98a213e,0x3d06dd96,0xae053edd,0x46bde64d, |
| 0xb58d5491,0x55dc471,0x6fd40604,0xff155060,0x24fb9819,0x97e9bdd6, |
| 0xcc434089,0x779ed967,0xbd42e8b0,0x888b8907,0x385b19e7,0xdbeec879, |
| 0x470a7ca1,0xe90f427c,0xc91e84f8,0x0,0x83868009,0x48ed2b32, |
| 0xac70111e,0x4e725a6c,0xfbff0efd,0x5638850f,0x1ed5ae3d,0x27392d36, |
| 0x64d90f0a,0x21a65c68,0xd1545b9b,0x3a2e3624,0xb1670a0c,0xfe75793, |
| 0xd296eeb4,0x9e919b1b,0x4fc5c080,0xa220dc61,0x694b775a,0x161a121c, |
| 0xaba93e2,0xe52aa0c0,0x43e0223c,0x1d171b12,0xb0d090e,0xadc78bf2, |
| 0xb9a8b62d,0xc8a91e14,0x8519f157,0x4c0775af,0xbbdd99ee,0xfd607fa3, |
| 0x9f2601f7,0xbcf5725c,0xc53b6644,0x347efb5b,0x7629438b,0xdcc623cb, |
| 0x68fcedb6,0x63f1e4b8,0xcadc31d7,0x10856342,0x40229713,0x2011c684, |
| 0x7d244a85,0xf83dbbd2,0x1132f9ae,0x6da129c7,0x4b2f9e1d,0xf330b2dc, |
| 0xec52860d,0xd0e3c177,0x6c16b32b,0x99b970a9,0xfa489411,0x2264e947, |
| 0xc48cfca8,0x1a3ff0a0,0xd82c7d56,0xef903322,0xc74e4987,0xc1d138d9, |
| 0xfea2ca8c,0x360bd498,0xcf81f5a6,0x28de7aa5,0x268eb7da,0xa4bfad3f, |
| 0xe49d3a2c,0xd927850,0x9bcc5f6a,0x62467e54,0xc2138df6,0xe8b8d890, |
| 0x5ef7392e,0xf5afc382,0xbe805d9f,0x7c93d069,0xa92dd56f,0xb31225cf, |
| 0x3b99acc8,0xa77d1810,0x6e639ce8,0x7bbb3bdb,0x97826cd,0xf418596e, |
| 0x1b79aec,0xa89a4f83,0x656e95e6,0x7ee6ffaa,0x8cfbc21,0xe6e815ef, |
| 0xd99be7ba,0xce366f4a,0xd4099fea,0xd67cb029,0xafb2a431,0x31233f2a, |
| 0x3094a5c6,0xc066a235,0x37bc4e74,0xa6ca82fc,0xb0d090e0,0x15d8a733, |
| 0x4a9804f1,0xf7daec41,0xe50cd7f,0x2ff69117,0x8dd64d76,0x4db0ef43, |
| 0x544daacc,0xdf0496e4,0xe3b5d19e,0x1b886a4c,0xb81f2cc1,0x7f516546, |
| 0x4ea5e9d,0x5d358c01,0x737487fa,0x2e410bfb,0x5a1d67b3,0x52d2db92, |
| 0x335610e9,0x1347d66d,0x8c61d79a,0x7a0ca137,0x8e14f859,0x893c13eb, |
| 0xee27a9ce,0x35c961b7,0xede51ce1,0x3cb1477a,0x59dfd29c,0x3f73f255, |
| 0x79ce1418,0xbf37c773,0xeacdf753,0x5baafd5f,0x146f3ddf,0x86db4478, |
| 0x81f3afca,0x3ec468b9,0x2c342438,0x5f40a3c2,0x72c31d16,0xc25e2bc, |
| 0x8b493c28,0x41950dff,0x7101a839,0xdeb30c08,0x9ce4b4d8,0x90c15664, |
| 0x6184cb7b,0x70b632d5,0x745c6c48,0x4257b8d0} |
| |
| type AES struct { |
| Nk int |
| Nr int |
| mode int |
| fkey [60]uint32 |
| rkey [60]uint32 |
| f [16]byte |
| } |
| |
| /* Rotates 32-bit word left by 1, 2 or 3 byte */ |
| |
| func aes_ROTL8(x uint32) uint32 { |
| return (((x)<<8)|((x)>>24)) |
| } |
| |
| func aes_ROTL16(x uint32) uint32 { |
| return (((x)<<16)|((x)>>16)) |
| } |
| |
| func aes_ROTL24(x uint32) uint32 { |
| return (((x)<<24)|((x)>>8)) |
| } |
| |
| func aes_pack(b [4]byte) uint32 { /* pack bytes into a 32-bit Word */ |
| return ((uint32(b[3])&0xff)<<24)|((uint32(b[2])&0xff)<<16)|((uint32(b[1])&0xff)<<8)|(uint32(b[0])&0xff) |
| } |
| |
| func aes_unpack(a uint32) [4]byte { /* unpack bytes from a word */ |
| var b=[4]byte{byte(a&0xff),byte((a>>8)&0xff),byte((a>>16)&0xff),byte((a>>24)&0xff)} |
| return b; |
| } |
| |
| func aes_bmul(x byte,y byte) byte { /* x.y= AntiLog(Log(x) + Log(y)) */ |
| |
| ix:=int(x)&0xff |
| iy:=int(y)&0xff |
| lx:=int(aes_ltab[ix])&0xff |
| ly:=int(aes_ltab[iy])&0xff |
| |
| if x != 0 && y != 0 { |
| return aes_ptab[(lx+ly)%255] |
| } else {return byte(0)} |
| } |
| |
| func aes_SubByte(a uint32) uint32 { |
| b:=aes_unpack(a) |
| b[0]=aes_fbsub[int(b[0])] |
| b[1]=aes_fbsub[int(b[1])] |
| b[2]=aes_fbsub[int(b[2])] |
| b[3]=aes_fbsub[int(b[3])] |
| return aes_pack(b); |
| } |
| |
| func aes_product(x uint32,y uint32) byte { /* dot product of two 4-byte arrays */ |
| xb:=aes_unpack(x) |
| yb:=aes_unpack(y) |
| |
| return (aes_bmul(xb[0],yb[0])^aes_bmul(xb[1],yb[1])^aes_bmul(xb[2],yb[2])^aes_bmul(xb[3],yb[3])) |
| } |
| |
| func aes_InvMixCol(x uint32) uint32 { /* matrix Multiplication */ |
| var b [4]byte |
| m:=aes_pack(aes_InCo) |
| b[3]=aes_product(m,x) |
| m=aes_ROTL24(m) |
| b[2]=aes_product(m,x) |
| m=aes_ROTL24(m) |
| b[1]=aes_product(m,x) |
| m=aes_ROTL24(m) |
| b[0]=aes_product(m,x) |
| var y=aes_pack(b) |
| return y |
| } |
| |
| func aes_increment(f []byte) { |
| for i:=0;i<16;i++ { |
| f[i]++ |
| if f[i]!=0 {break} |
| } |
| } |
| |
| /* reset cipher */ |
| func (A *AES) Reset(m int,iv []byte) { /* reset mode, or reset iv */ |
| A.mode=m; |
| for i:=0;i<16;i++ {A.f[i]=0} |
| if (A.mode != AES_ECB) && (iv != nil) { |
| for i:=0;i<16;i++ {A.f[i]=iv[i]} |
| } |
| } |
| |
| func (A *AES) Init(m int,nk int,key []byte,iv []byte) bool { |
| /* Key Scheduler. Create expanded encryption key */ |
| var CipherKey [8]uint32 |
| var b [4]byte |
| nk/=4 |
| if nk!=4 && nk!=6 && nk!=8 {return false} |
| nr:=6+nk |
| A.Nk=nk |
| A.Nr=nr |
| A.Reset(m,iv); |
| N:=4*(nr+1) |
| |
| j:=0 |
| for i:=0;i<nk;i++ { |
| for k:=0;k<4;k++ {b[k]=key[j+k]} |
| CipherKey[i]=aes_pack(b); |
| j+=4; |
| } |
| for i:=0;i<nk;i++ {A.fkey[i]=CipherKey[i]} |
| j=nk |
| for k:=0;j<N;k++ { |
| A.fkey[j]=A.fkey[j-nk]^aes_SubByte(aes_ROTL24(A.fkey[j-1]))^uint32(aes_rco[k]) |
| for i:=1;i<nk && (i+j)<N;i++ { |
| A.fkey[i+j]=A.fkey[i+j-nk]^A.fkey[i+j-1] |
| } |
| j+=nk |
| } |
| |
| /* now for the expanded decrypt key in reverse order */ |
| |
| for j:=0;j<4;j++ {A.rkey[j+N-4]=A.fkey[j]} |
| for i:=4;i<N-4;i+=4 { |
| k:=N-4-i; |
| for j:=0;j<4;j++ {A.rkey[k+j]=aes_InvMixCol(A.fkey[i+j])} |
| } |
| for j:=N-4;j<N;j++ {A.rkey[j-N+4]=A.fkey[j]} |
| return true |
| } |
| |
| func NewAES() *AES { |
| var A=new(AES) |
| return A |
| } |
| |
| func (A *AES) Getreg() [16]byte { |
| var ir [16]byte |
| for i:=0;i<16;i++ {ir[i]=A.f[i]} |
| return ir |
| } |
| |
| /* Encrypt a single block */ |
| func (A *AES) ecb_encrypt(buff []byte) { |
| var b [4]byte |
| var p [4]uint32 |
| var q [4]uint32 |
| |
| j:=0 |
| for i:=0;i<4;i++ { |
| for k:=0;k<4;k++ {b[k]=buff[j+k]} |
| p[i]=aes_pack(b) |
| p[i]^=A.fkey[i] |
| j+=4 |
| } |
| |
| k:=4 |
| |
| /* State alternates between p and q */ |
| for i:=1;i<A.Nr;i++ { |
| q[0]=A.fkey[k]^aes_ftable[int(p[0]&0xff)]^aes_ROTL8(aes_ftable[int((p[1]>>8)&0xff)])^aes_ROTL16(aes_ftable[int((p[2]>>16)&0xff)])^aes_ROTL24(aes_ftable[int((p[3]>>24)&0xff)]) |
| |
| q[1]=A.fkey[k+1]^aes_ftable[int(p[1]&0xff)]^aes_ROTL8(aes_ftable[int((p[2]>>8)&0xff)])^aes_ROTL16(aes_ftable[int((p[3]>>16)&0xff)])^aes_ROTL24(aes_ftable[int((p[0]>>24)&0xff)]) |
| |
| q[2]=A.fkey[k+2]^aes_ftable[int(p[2]&0xff)]^aes_ROTL8(aes_ftable[int((p[3]>>8)&0xff)])^aes_ROTL16(aes_ftable[int((p[0]>>16)&0xff)])^aes_ROTL24(aes_ftable[int((p[1]>>24)&0xff)]) |
| |
| q[3]=A.fkey[k+3]^aes_ftable[int(p[3]&0xff)]^aes_ROTL8(aes_ftable[int((p[0]>>8)&0xff)])^aes_ROTL16(aes_ftable[int((p[1]>>16)&0xff)])^aes_ROTL24(aes_ftable[int((p[2]>>24)&0xff)]) |
| |
| k+=4; |
| for j=0;j<4;j++ { |
| t:=p[j]; p[j]=q[j]; q[j]=t |
| } |
| } |
| |
| /* Last Round */ |
| |
| q[0]=A.fkey[k]^uint32(aes_fbsub[int(p[0]&0xff)])^aes_ROTL8(uint32(aes_fbsub[int((p[1]>>8)&0xff)]))^aes_ROTL16(uint32(aes_fbsub[int((p[2]>>16)&0xff)]))^aes_ROTL24(uint32(aes_fbsub[int((p[3]>>24)&0xff)])) |
| |
| q[1]=A.fkey[k+1]^uint32(aes_fbsub[int(p[1]&0xff)])^aes_ROTL8(uint32(aes_fbsub[int((p[2]>>8)&0xff)]))^aes_ROTL16(uint32(aes_fbsub[int((p[3]>>16)&0xff)]))^aes_ROTL24(uint32(aes_fbsub[int((p[0]>>24)&0xff)])) |
| |
| q[2]=A.fkey[k+2]^uint32(aes_fbsub[int(p[2]&0xff)])^aes_ROTL8(uint32(aes_fbsub[int((p[3]>>8)&0xff)]))^aes_ROTL16(uint32(aes_fbsub[int((p[0]>>16)&0xff)]))^aes_ROTL24(uint32(aes_fbsub[int((p[1]>>24)&0xff)])) |
| |
| q[3]=A.fkey[k+3]^uint32(aes_fbsub[int(p[3]&0xff)])^aes_ROTL8(uint32(aes_fbsub[int((p[0]>>8)&0xff)]))^aes_ROTL16(uint32(aes_fbsub[int((p[1]>>16)&0xff)]))^aes_ROTL24(uint32(aes_fbsub[int((p[2]>>24)&0xff)])) |
| |
| j=0 |
| for i:=0;i<4;i++ { |
| b=aes_unpack(q[i]) |
| for k=0;k<4;k++ {buff[j+k]=b[k]} |
| j+=4 |
| } |
| } |
| |
| /* Decrypt a single block */ |
| func (A *AES) ecb_decrypt(buff []byte) { |
| var b [4]byte |
| var p [4]uint32 |
| var q [4]uint32 |
| |
| j:=0 |
| for i:=0;i<4;i++ { |
| for k:=0;k<4;k++ {b[k]=buff[j+k]} |
| p[i]=aes_pack(b) |
| p[i]^=A.rkey[i] |
| j+=4 |
| } |
| |
| k:=4 |
| |
| /* State alternates between p and q */ |
| for i:=1;i<A.Nr;i++ { |
| |
| q[0]=A.rkey[k]^aes_rtable[int(p[0]&0xff)]^aes_ROTL8(aes_rtable[int((p[3]>>8)&0xff)])^aes_ROTL16(aes_rtable[int((p[2]>>16)&0xff)])^aes_ROTL24(aes_rtable[int((p[1]>>24)&0xff)]) |
| |
| q[1]=A.rkey[k+1]^aes_rtable[int(p[1]&0xff)]^aes_ROTL8(aes_rtable[int((p[0]>>8)&0xff)])^aes_ROTL16(aes_rtable[int((p[3]>>16)&0xff)])^aes_ROTL24(aes_rtable[int((p[2]>>24)&0xff)]) |
| |
| |
| q[2]=A.rkey[k+2]^aes_rtable[int(p[2]&0xff)]^aes_ROTL8(aes_rtable[int((p[1]>>8)&0xff)])^aes_ROTL16(aes_rtable[int((p[0]>>16)&0xff)])^aes_ROTL24(aes_rtable[int((p[3]>>24)&0xff)]) |
| |
| q[3]=A.rkey[k+3]^aes_rtable[int(p[3]&0xff)]^aes_ROTL8(aes_rtable[int((p[2]>>8)&0xff)])^aes_ROTL16(aes_rtable[int((p[1]>>16)&0xff)])^aes_ROTL24(aes_rtable[int((p[0]>>24)&0xff)]) |
| |
| |
| k+=4; |
| for j:=0;j<4;j++ { |
| t:=p[j]; p[j]=q[j]; q[j]=t |
| } |
| } |
| |
| /* Last Round */ |
| |
| q[0]=A.rkey[k]^uint32(aes_rbsub[int(p[0]&0xff)])^aes_ROTL8(uint32(aes_rbsub[int((p[3]>>8)&0xff)]))^aes_ROTL16(uint32(aes_rbsub[int((p[2]>>16)&0xff)]))^aes_ROTL24(uint32(aes_rbsub[int((p[1]>>24)&0xff)])) |
| |
| q[1]=A.rkey[k+1]^uint32(aes_rbsub[int(p[1]&0xff)])^aes_ROTL8(uint32(aes_rbsub[int((p[0]>>8)&0xff)]))^aes_ROTL16(uint32(aes_rbsub[int((p[3]>>16)&0xff)]))^aes_ROTL24(uint32(aes_rbsub[int((p[2]>>24)&0xff)])) |
| |
| |
| q[2]=A.rkey[k+2]^uint32(aes_rbsub[int(p[2]&0xff)])^aes_ROTL8(uint32(aes_rbsub[int((p[1]>>8)&0xff)]))^aes_ROTL16(uint32(aes_rbsub[int((p[0]>>16)&0xff)]))^aes_ROTL24(uint32(aes_rbsub[int((p[3]>>24)&0xff)])) |
| |
| q[3]=A.rkey[k+3]^uint32(aes_rbsub[int((p[3])&0xff)])^aes_ROTL8(uint32(aes_rbsub[int((p[2]>>8)&0xff)]))^aes_ROTL16(uint32(aes_rbsub[int((p[1]>>16)&0xff)]))^aes_ROTL24(uint32(aes_rbsub[int((p[0]>>24)&0xff)])) |
| |
| j=0 |
| for i:=0;i<4;i++ { |
| b=aes_unpack(q[i]); |
| for k:=0;k<4;k++ {buff[j+k]=b[k]} |
| j+=4 |
| } |
| } |
| |
| /* Encrypt using selected mode of operation */ |
| func (A *AES) Encrypt(buff []byte) uint32 { |
| var st [16]byte |
| |
| // Supported Modes of Operation |
| |
| var fell_off uint32=0 |
| switch A.mode { |
| case AES_ECB: |
| A.ecb_encrypt(buff) |
| return 0 |
| case AES_CBC: |
| for j:=0;j<16;j++ {buff[j]^=A.f[j]} |
| A.ecb_encrypt(buff) |
| for j:=0;j<16;j++ {A.f[j]=buff[j]} |
| return 0 |
| |
| case AES_CFB1: |
| fallthrough |
| case AES_CFB2: |
| fallthrough |
| case AES_CFB4: |
| bytes:=A.mode-AES_CFB1+1 |
| for j:=0;j<bytes;j++ {fell_off=(fell_off<<8)|uint32(A.f[j])} |
| for j:=0;j<16;j++ {st[j]=A.f[j]} |
| for j:=bytes;j<16;j++ {A.f[j-bytes]=A.f[j]} |
| A.ecb_encrypt(st[:]) |
| for j:=0;j<bytes;j++ { |
| buff[j]^=st[j] |
| A.f[16-bytes+j]=buff[j] |
| } |
| return fell_off |
| |
| case AES_OFB1: |
| fallthrough |
| case AES_OFB2: |
| fallthrough |
| case AES_OFB4: |
| fallthrough |
| case AES_OFB8: |
| fallthrough |
| case AES_OFB16: |
| |
| bytes:=A.mode-AES_OFB1+1 |
| A.ecb_encrypt(A.f[:]) |
| for j:=0;j<bytes;j++ {buff[j]^=A.f[j]} |
| return 0; |
| |
| case AES_CTR1: |
| fallthrough |
| case AES_CTR2: |
| fallthrough |
| case AES_CTR4: |
| fallthrough |
| case AES_CTR8: |
| fallthrough |
| case AES_CTR16: |
| bytes:=A.mode-AES_CTR1+1 |
| for j:=0;j<16;j++ {st[j]=A.f[j]} |
| A.ecb_encrypt(st[:]) |
| for j:=0;j<bytes;j++ {buff[j]^=st[j]} |
| aes_increment(A.f[:]) |
| return 0 |
| |
| default: |
| return 0 |
| } |
| } |
| |
| /* Decrypt using selected mode of operation */ |
| func (A *AES) Decrypt(buff []byte) uint32 { |
| |
| var st [16]byte |
| |
| // Supported Modes of Operation |
| |
| var fell_off uint32=0 |
| switch A.mode { |
| case AES_ECB: |
| A.ecb_decrypt(buff); |
| return 0; |
| case AES_CBC: |
| for j:=0;j<16;j++ { |
| st[j]=A.f[j]; |
| A.f[j]=buff[j]; |
| } |
| A.ecb_decrypt(buff); |
| for j:=0;j<16;j++ { |
| buff[j]^=st[j]; |
| st[j]=0 |
| } |
| return 0 |
| case AES_CFB1: |
| fallthrough |
| case AES_CFB2: |
| fallthrough |
| case AES_CFB4: |
| bytes:=A.mode-AES_CFB1+1; |
| for j:=0;j<bytes;j++ {fell_off=(fell_off<<8)|uint32(A.f[j])} |
| for j:=0;j<16;j++ {st[j]=A.f[j]} |
| for j:=bytes;j<16;j++ {A.f[j-bytes]=A.f[j]} |
| A.ecb_encrypt(st[:]) |
| for j:=0;j<bytes;j++ { |
| A.f[16-bytes+j]=buff[j] |
| buff[j]^=st[j] |
| } |
| return fell_off |
| case AES_OFB1: |
| fallthrough |
| case AES_OFB2: |
| fallthrough |
| case AES_OFB4: |
| fallthrough |
| case AES_OFB8: |
| fallthrough |
| case AES_OFB16: |
| bytes:=A.mode-AES_OFB1+1 |
| A.ecb_encrypt(A.f[:]); |
| for j:=0;j<bytes;j++ {buff[j]^=A.f[j]} |
| return 0 |
| |
| case AES_CTR1: |
| fallthrough |
| case AES_CTR2: |
| fallthrough |
| case AES_CTR4: |
| fallthrough |
| case AES_CTR8: |
| fallthrough |
| case AES_CTR16: |
| bytes:=A.mode-AES_CTR1+1 |
| for j:=0;j<16;j++ {st[j]=A.f[j]} |
| A.ecb_encrypt(st[:]) |
| for j:=0;j<bytes;j++ {buff[j]^=st[j]} |
| aes_increment(A.f[:]) |
| return 0 |
| |
| default: |
| return 0; |
| } |
| } |
| |
| /* Clean up and delete left-overs */ |
| func (A *AES) End() { // clean up |
| for i:=0;i<4*(A.Nr+1);i++ {A.fkey[i]=0; A.rkey[i]=0} |
| for i:=0;i<16;i++ {A.f[i]=0} |
| } |
| /* |
| func main() { |
| var key [32]byte |
| var block [16]byte |
| var iv [16]byte |
| |
| for i:=0;i<32;i++ {key[i]=0} |
| key[0]=1 |
| for i:=0;i<16;i++ {iv[i]=byte(i)} |
| for i:=0;i<16;i++ {block[i]=byte(i)} |
| |
| a:=NewAES() |
| |
| a.Init(AES_CTR16,32,key[:],iv[:]) |
| fmt.Printf("Plain= \n") |
| for i:=0;i<16;i++ {fmt.Printf("%02X ", block[i]&0xff)} |
| fmt.Printf("\n") |
| |
| a.Encrypt(block[:]) |
| |
| fmt.Printf("Encrypt= \n") |
| for i:=0;i<16;i++ {fmt.Printf("%02X ", block[i]&0xff)} |
| fmt.Printf("\n") |
| |
| a.Reset(AES_CTR16,iv[:]) |
| a.Decrypt(block[:]) |
| |
| fmt.Printf("Decrypt= \n") |
| for i:=0;i<16;i++ {fmt.Printf("%02X ", block[i]&0xff)} |
| fmt.Printf("\n") |
| |
| a.End(); |
| } |
| */ |
