Repository: incubator-milagro-crypto Updated Branches: refs/heads/master c8ca57b4d -> 70e3a3a36
http://git-wip-us.apache.org/repos/asf/incubator-milagro-crypto/blob/70e3a3a3/version22/go/AES.go ---------------------------------------------------------------------- diff --git a/version22/go/AES.go b/version22/go/AES.go new file mode 100644 index 0000000..1aeb6d7 --- /dev/null +++ b/version22/go/AES.go @@ -0,0 +1,634 @@ +/* +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 main + +//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(); +} +*/
