From 3478a4e421edd81a5932a796bd931b198ef23789 Mon Sep 17 00:00:00 2001 From: derek mcquay Date: Sun, 21 Feb 2016 23:35:51 -0800 Subject: [PATCH] adding files for aes --- psyfer/aes.go | 483 +++++++++++++++++++++++++++++++++++++++++++++ psyfer/aes_test.go | 356 +++++++++++++++++++++++++++++++++ 2 files changed, 839 insertions(+) create mode 100644 psyfer/aes.go create mode 100644 psyfer/aes_test.go diff --git a/psyfer/aes.go b/psyfer/aes.go new file mode 100644 index 0000000..24a74d0 --- /dev/null +++ b/psyfer/aes.go @@ -0,0 +1,483 @@ +package psyfer + +var Sbox = [][]byte{ + {0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76}, + {0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0}, + {0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15}, + {0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75}, + {0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84}, + {0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf}, + {0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8}, + {0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2}, + {0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73}, + {0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb}, + {0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79}, + {0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08}, + {0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a}, + {0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e}, + {0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf}, + {0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16}, +} + +var InvSbox = [][]byte{ + {0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb}, + {0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb}, + {0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e}, + {0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25}, + {0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92}, + {0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84}, + {0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06}, + {0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b}, + {0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73}, + {0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e}, + {0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b}, + {0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4}, + {0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f}, + {0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef}, + {0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61}, + {0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d}, +} + +var MM = []byte{ + 2, 3, 1, 1, + 1, 2, 3, 1, + 1, 1, 2, 3, + 3, 1, 1, 2, +} + +var iMM = []byte{ + 14, 11, 13, 9, + 9, 14, 11, 13, + 13, 9, 14, 11, + 11, 13, 9, 14, +} + +var Rcon = []byte{0x00, // Rcon[] is 1-based, so the first entry is just a place holder + 0x01, 0x02, 0x04, 0x08, + 0x10, 0x20, 0x40, 0x80, + 0x1B, 0x36, 0x6C, 0xD8, + 0xAB, 0x4D, 0x9A, 0x2F, + 0x5E, 0xBC, 0x63, 0xC6, + 0x97, 0x35, 0x6A, 0xD4, + 0xB3, 0x7D, 0xFA, 0xEF, + 0xC5, 0x91, 0x39, 0x72, + 0xE4, 0xD3, 0xBD, 0x61, + 0xC2, 0x9F, 0x25, 0x4A, + 0x94, 0x33, 0x66, 0xCC, + 0x83, 0x1D, 0x3A, 0x74, + 0xE8, 0xCB, 0x8D, +} + +type Block []byte + +var keyexpanded []Block +var key Block + +func Cipher(cur Block, bit int, incomingKey Block) Block { + key = Block{} + keyexpanded = []Block{} + AssignKey(incomingKey) + if bit == 128 { + KeyExpansionBase(128) + cur = AddRoundKey(cur, 0) + for i := 0; i < 9; i++ { + cur = SubBytes(cur) + cur = ShiftRows(cur) + cur = MixColumns(cur) + cur = AddRoundKey(cur, i+1) + //fmt.Printf("\n") + //for i := 0; i < 16; i++ { + // fmt.Printf("% x", cur[i]) + // if i%4 == 3 { + // fmt.Printf("\n") + // } + //} + + } + cur = SubBytes(cur) + cur = ShiftRows(cur) + cur = AddRoundKey(cur, 10) + return cur + } + if bit == 192 { + KeyExpansionBase(192) + cur = AddRoundKey(cur, 0) + for i := 0; i < 11; i++ { + cur = SubBytes(cur) + cur = ShiftRows(cur) + cur = MixColumns(cur) + cur = AddRoundKey(cur, i+1) + if i == 0 { + } + } + cur = SubBytes(cur) + cur = ShiftRows(cur) + cur = AddRoundKey(cur, 12) + return cur + } + if bit == 256 { + KeyExpansionBase(256) + cur = AddRoundKey(cur, 0) + for i := 0; i < 13; i++ { + cur = SubBytes(cur) + cur = ShiftRows(cur) + cur = MixColumns(cur) + cur = AddRoundKey(cur, i+1) + if i == 0 { + } + } + cur = SubBytes(cur) + cur = ShiftRows(cur) + cur = AddRoundKey(cur, 14) + return cur + } + return cur +} + +func InvCipher(cur Block, bit int, incomingKey Block) Block { + key = Block{} + keyexpanded = []Block{} + AssignKey(incomingKey) + if bit == 128 { + KeyExpansionBase(128) + cur = AddRoundKey(cur, 10) + for i := 9; i > 0; i-- { + cur = InvShiftRows(cur) + cur = InvSubBytes(cur) + cur = AddRoundKey(cur, i) + cur = InvMixColumns(cur) + } + cur = InvSubBytes(cur) + cur = InvShiftRows(cur) + cur = AddRoundKey(cur, 0) + return cur + } + if bit == 192 { + KeyExpansionBase(192) + cur = AddRoundKey(cur, 12) + for i := 11; i > 0; i-- { + cur = InvShiftRows(cur) + cur = InvSubBytes(cur) + cur = AddRoundKey(cur, i) + cur = InvMixColumns(cur) + } + cur = InvSubBytes(cur) + cur = InvShiftRows(cur) + cur = AddRoundKey(cur, 0) + return cur + } + if bit == 256 { + KeyExpansionBase(256) + cur = AddRoundKey(cur, 14) + for i := 13; i > 0; i-- { + cur = InvShiftRows(cur) + cur = InvSubBytes(cur) + cur = AddRoundKey(cur, i) + cur = InvMixColumns(cur) + } + cur = InvSubBytes(cur) + cur = InvShiftRows(cur) + cur = AddRoundKey(cur, 0) + return cur + } + return cur +} + +func AddRoundKey(cur Block, iteration int) Block { + for i := 0; i < 16; i++ { + cur[i] = cur[i] ^ keyexpanded[iteration][i] + } + return cur +} + +func AssignKey(cur Block) { + key = cur +} + +func KeyExpansionBase(keysize int) { + if keysize == 128 { + keyexpanded = append(keyexpanded, key) + for i := 0; i < 10; i++ { + KeyExpansion(keyexpanded[i], i+1) + } + } else if keysize == 192 { + keyexpanded = append(keyexpanded, key) + for i := 0; i < 8; i++ { + KeyExpansion192(keyexpanded[i], i+1) + } + temp := keyexpanded + keyexpanded = []Block{} + for i := 0; i < 9; i++ { + if i == 8 { + a := Block{ + temp[i][0], temp[i][1], temp[i][2], temp[i][3], + temp[i][6], temp[i][7], temp[i][8], temp[i][9], + temp[i][12], temp[i][13], temp[i][14], temp[i][15], + temp[i][18], temp[i][19], temp[i][20], temp[i][21], + } + b := Block{ + temp[i][4], temp[i][5], 0, 0, + temp[i][10], temp[i][11], 0, 0, + temp[i][16], temp[i][17], 0, 0, + temp[i][22], temp[i][23], 0, 0, + } + keyexpanded = append(keyexpanded, a) + keyexpanded = append(keyexpanded, b) + } else { + a := Block{ + temp[i][0], temp[i][1], temp[i][2], temp[i][3], + temp[i][6], temp[i][7], temp[i][8], temp[i][9], + temp[i][12], temp[i][13], temp[i][14], temp[i][15], + temp[i][18], temp[i][19], temp[i][20], temp[i][21], + } + b := Block{ + temp[i][4], temp[i][5], temp[i+1][0], temp[i+1][1], + temp[i][10], temp[i][11], temp[i+1][6], temp[i+1][7], + temp[i][16], temp[i][17], temp[i+1][12], temp[i+1][13], + temp[i][22], temp[i][23], temp[i+1][18], temp[i+1][19], + } + c := Block{ + temp[i+1][2], temp[i+1][3], temp[i+1][4], temp[i+1][5], + temp[i+1][8], temp[i+1][9], temp[i+1][10], temp[i+1][11], + temp[i+1][14], temp[i+1][15], temp[i+1][16], temp[i+1][17], + temp[i+1][20], temp[i+1][21], temp[i+1][22], temp[i+1][23], + } + keyexpanded = append(keyexpanded, a) + keyexpanded = append(keyexpanded, b) + keyexpanded = append(keyexpanded, c) + } + i++ + } + } else if keysize == 256 { + keyexpanded = append(keyexpanded, key) + for i := 0; i < 8; i++ { + KeyExpansion256(keyexpanded[i], i+1) + } + temp := keyexpanded + keyexpanded = []Block{} + for i := 0; i < 9; i++ { + a := Block{ + temp[i][0], temp[i][1], temp[i][2], temp[i][3], + temp[i][8], temp[i][9], temp[i][10], temp[i][11], + temp[i][16], temp[i][17], temp[i][18], temp[i][19], + temp[i][24], temp[i][25], temp[i][26], temp[i][27], + } + b := Block{ + temp[i][4], temp[i][5], temp[i][6], temp[i][7], + temp[i][12], temp[i][13], temp[i][14], temp[i][15], + temp[i][20], temp[i][21], temp[i][22], temp[i][23], + temp[i][28], temp[i][29], temp[i][30], temp[i][31], + } + keyexpanded = append(keyexpanded, a) + keyexpanded = append(keyexpanded, b) + } + } +} + +func KeyExpansion(cur Block, iteration int) Block { + var nb = Block{ //nb = nextBlock + 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + } + rotword := []byte{cur[7], cur[11], cur[15], cur[3]} + for i := 0; i < 4; i++ { + upper, lower := SplitBytes(rotword[i]) + rotword[i] = Sbox[upper][lower] + } + rotword[0] = rotword[0] ^ cur[0] ^ Rcon[iteration] + rotword[1] = rotword[1] ^ cur[4] + rotword[2] = rotword[2] ^ cur[8] + rotword[3] = rotword[3] ^ cur[12] + + nb[0], nb[4], nb[8], nb[12] = rotword[0], rotword[1], rotword[2], rotword[3] + nb[1], nb[5], nb[9], nb[13] = nb[0]^cur[1], nb[4]^cur[5], nb[8]^cur[9], nb[12]^cur[13] + nb[2], nb[6], nb[10], nb[14] = nb[1]^cur[2], nb[5]^cur[6], nb[9]^cur[10], nb[13]^cur[14] + nb[3], nb[7], nb[11], nb[15] = nb[2]^cur[3], nb[6]^cur[7], nb[10]^cur[11], nb[14]^cur[15] + keyexpanded = append(keyexpanded, nb) + return nb +} + +func KeyExpansion192(cur Block, iteration int) Block { + var nb = Block{ //nb = nextBlock + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + } + rotword := []byte{cur[11], cur[17], cur[23], cur[5]} + for i := 0; i < 4; i++ { + upper, lower := SplitBytes(rotword[i]) + rotword[i] = Sbox[upper][lower] + } + rotword[0] = rotword[0] ^ cur[0] ^ Rcon[iteration] + rotword[1] = rotword[1] ^ cur[6] + rotword[2] = rotword[2] ^ cur[12] + rotword[3] = rotword[3] ^ cur[18] + + nb[0], nb[6], nb[12], nb[18] = rotword[0], rotword[1], rotword[2], rotword[3] + nb[1], nb[7], nb[13], nb[19] = nb[0]^cur[1], nb[6]^cur[7], nb[12]^cur[13], nb[18]^cur[19] + nb[2], nb[8], nb[14], nb[20] = nb[1]^cur[2], nb[7]^cur[8], nb[13]^cur[14], nb[19]^cur[20] + nb[3], nb[9], nb[15], nb[21] = nb[2]^cur[3], nb[8]^cur[9], nb[14]^cur[15], nb[20]^cur[21] + nb[4], nb[10], nb[16], nb[22] = nb[3]^cur[4], nb[9]^cur[10], nb[15]^cur[16], nb[21]^cur[22] + nb[5], nb[11], nb[17], nb[23] = nb[4]^cur[5], nb[10]^cur[11], nb[16]^cur[17], nb[22]^cur[23] + keyexpanded = append(keyexpanded, nb) + + return nb +} + +func KeyExpansion256(cur Block, iteration int) Block { + var nb = Block{ //nb = nextBlock + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + } + rotword := []byte{cur[15], cur[23], cur[31], cur[7]} + for i := 0; i < 4; i++ { + upper, lower := SplitBytes(rotword[i]) + rotword[i] = Sbox[upper][lower] + } + rotword[0] = rotword[0] ^ cur[0] ^ Rcon[iteration] + rotword[1] = rotword[1] ^ cur[8] + rotword[2] = rotword[2] ^ cur[16] + rotword[3] = rotword[3] ^ cur[24] + + nb[0], nb[8], nb[16], nb[24] = rotword[0], rotword[1], rotword[2], rotword[3] + nb[1], nb[9], nb[17], nb[25] = nb[0]^cur[1], nb[8]^cur[9], nb[16]^cur[17], nb[24]^cur[25] + nb[2], nb[10], nb[18], nb[26] = nb[1]^cur[2], nb[9]^cur[10], nb[17]^cur[18], nb[25]^cur[26] + nb[3], nb[11], nb[19], nb[27] = nb[2]^cur[3], nb[10]^cur[11], nb[18]^cur[19], nb[26]^cur[27] + sw := []byte{nb[3], nb[11], nb[19], nb[27]} //sw = subword + for i := 0; i < 4; i++ { + upper, lower := SplitBytes(sw[i]) + sw[i] = Sbox[upper][lower] + } + nb[4], nb[12], nb[20], nb[28] = sw[0]^cur[4], sw[1]^cur[12], sw[2]^cur[20], sw[3]^cur[28] + nb[5], nb[13], nb[21], nb[29] = nb[4]^cur[5], nb[12]^cur[13], nb[20]^cur[21], nb[28]^cur[29] + nb[6], nb[14], nb[22], nb[30] = nb[5]^cur[6], nb[13]^cur[14], nb[21]^cur[22], nb[29]^cur[30] + nb[7], nb[15], nb[23], nb[31] = nb[6]^cur[7], nb[14]^cur[15], nb[22]^cur[23], nb[30]^cur[31] + keyexpanded = append(keyexpanded, nb) + + return nb +} + +func SplitBytes(b byte) (byte, byte) { + return b >> 4, b & 0x0f +} + +func SubBytes(cur Block) Block { + for i := 0; i < 16; i++ { + upper, lower := SplitBytes(cur[i]) + cur[i] = Sbox[upper][lower] + } + return cur +} + +func InvSubBytes(cur Block) Block { + for i := 0; i < 16; i++ { + upper, lower := SplitBytes(cur[i]) + cur[i] = InvSbox[upper][lower] + } + return cur +} + +func Xtime(cur byte) []byte { + var bytes []byte + bytes = append(bytes, cur) + for i := 1; i < 8; i++ { // first iteration done outside of for-loop + if (cur >> 7) == 1 { + cur = cur << 1 + cur = cur ^ 0x1b + } else { + cur = cur << 1 + } + bytes = append(bytes, cur) + } + return bytes +} + +func FFmult(cur []byte, multiplier byte) byte { + if multiplier == 1 { + return cur[0] + } else if multiplier == 2 { + return cur[1] + } else if multiplier == 3 { + return cur[0] ^ cur[1] + } else if multiplier == 9 { + return cur[0] ^ cur[3] + } else if multiplier == 11 { + return cur[0] ^ cur[1] ^ cur[3] + } else if multiplier == 13 { + return cur[0] ^ cur[2] ^ cur[3] + } else if multiplier == 14 { + return cur[1] ^ cur[2] ^ cur[3] + } + return 0 +} + +func mixColumns_assist(cur []byte) []byte { + a1 := FFmult(Xtime(cur[0]), MM[0]) ^ FFmult(Xtime(cur[1]), MM[1]) ^ FFmult(Xtime(cur[2]), MM[2]) ^ FFmult(Xtime(cur[3]), MM[3]) + a2 := FFmult(Xtime(cur[0]), MM[4]) ^ FFmult(Xtime(cur[1]), MM[5]) ^ FFmult(Xtime(cur[2]), MM[6]) ^ FFmult(Xtime(cur[3]), MM[7]) + a3 := FFmult(Xtime(cur[0]), MM[8]) ^ FFmult(Xtime(cur[1]), MM[9]) ^ FFmult(Xtime(cur[2]), MM[10]) ^ FFmult(Xtime(cur[3]), MM[11]) + a4 := FFmult(Xtime(cur[0]), MM[12]) ^ FFmult(Xtime(cur[1]), MM[13]) ^ FFmult(Xtime(cur[2]), MM[14]) ^ FFmult(Xtime(cur[3]), MM[15]) + return []byte{a1, a2, a3, a4} +} + +func MixColumns(cur Block) Block { + col1 := []byte{cur[0], cur[4], cur[8], cur[12]} + col2 := []byte{cur[1], cur[5], cur[9], cur[13]} + col3 := []byte{cur[2], cur[6], cur[10], cur[14]} + col4 := []byte{cur[3], cur[7], cur[11], cur[15]} + col1 = mixColumns_assist(col1) + col2 = mixColumns_assist(col2) + col3 = mixColumns_assist(col3) + col4 = mixColumns_assist(col4) + cur = Block{ + col1[0], col2[0], col3[0], col4[0], + col1[1], col2[1], col3[1], col4[1], + col1[2], col2[2], col3[2], col4[2], + col1[3], col2[3], col3[3], col4[3], + } + return cur +} + +func InvMixColumns(cur Block) Block { + col1 := []byte{cur[0], cur[4], cur[8], cur[12]} + col2 := []byte{cur[1], cur[5], cur[9], cur[13]} + col3 := []byte{cur[2], cur[6], cur[10], cur[14]} + col4 := []byte{cur[3], cur[7], cur[11], cur[15]} + col1 = InvmixColumns_assist(col1) + col2 = InvmixColumns_assist(col2) + col3 = InvmixColumns_assist(col3) + col4 = InvmixColumns_assist(col4) + cur = Block{ + col1[0], col2[0], col3[0], col4[0], + col1[1], col2[1], col3[1], col4[1], + col1[2], col2[2], col3[2], col4[2], + col1[3], col2[3], col3[3], col4[3], + } + return cur +} + +func InvmixColumns_assist(cur []byte) []byte { + a1 := FFmult(Xtime(cur[0]), iMM[0]) ^ FFmult(Xtime(cur[1]), iMM[1]) ^ FFmult(Xtime(cur[2]), iMM[2]) ^ FFmult(Xtime(cur[3]), iMM[3]) + a2 := FFmult(Xtime(cur[0]), iMM[4]) ^ FFmult(Xtime(cur[1]), iMM[5]) ^ FFmult(Xtime(cur[2]), iMM[6]) ^ FFmult(Xtime(cur[3]), iMM[7]) + a3 := FFmult(Xtime(cur[0]), iMM[8]) ^ FFmult(Xtime(cur[1]), iMM[9]) ^ FFmult(Xtime(cur[2]), iMM[10]) ^ FFmult(Xtime(cur[3]), iMM[11]) + a4 := FFmult(Xtime(cur[0]), iMM[12]) ^ FFmult(Xtime(cur[1]), iMM[13]) ^ FFmult(Xtime(cur[2]), iMM[14]) ^ FFmult(Xtime(cur[3]), iMM[15]) + return []byte{a1, a2, a3, a4} +} + +func ShiftRows(cur Block) Block { + cur[4], cur[5], cur[6], cur[7] = cur[5], cur[6], cur[7], cur[4] + cur[8], cur[9], cur[10], cur[11] = cur[10], cur[11], cur[8], cur[9] + cur[12], cur[13], cur[14], cur[15] = cur[15], cur[12], cur[13], cur[14] + return cur +} + +func InvShiftRows(cur Block) Block { + cur[4], cur[5], cur[6], cur[7] = cur[7], cur[4], cur[5], cur[6] + cur[8], cur[9], cur[10], cur[11] = cur[10], cur[11], cur[8], cur[9] + cur[12], cur[13], cur[14], cur[15] = cur[13], cur[14], cur[15], cur[12] + return cur +} diff --git a/psyfer/aes_test.go b/psyfer/aes_test.go new file mode 100644 index 0000000..3d1c8e3 --- /dev/null +++ b/psyfer/aes_test.go @@ -0,0 +1,356 @@ +package psyfer + +import ( + "bytes" + "testing" +) + +func TestShiftRows(t *testing.T) { + input := Block{ + 0, 1, 2, 3, + 4, 5, 6, 7, + 8, 9, 10, 11, + 12, 13, 14, 15, + } + expected := Block{ + 0, 1, 2, 3, + 5, 6, 7, 4, + 10, 11, 8, 9, + 15, 12, 13, 14, + } + actual := ShiftRows(input) + if !bytes.Equal(expected, actual) { + t.Errorf( + "failed to get right ShiftRows:\n\texpected: % x\n\t actual: % x", + expected, + actual, + ) + + } +} + +func TestSubBytes(t *testing.T) { + input := Block{ + 0x19, 0xa0, 0x9a, 0xe9, + 0x3d, 0xf4, 0xc6, 0xf8, + 0xe3, 0xe2, 0x8d, 0x48, + 0xbe, 0x2b, 0x2a, 0x08, + } + expected := Block{ + 0xd4, 0xe0, 0xb8, 0x1e, + 0x27, 0xbf, 0xb4, 0x41, + 0x11, 0x98, 0x5d, 0x52, + 0xae, 0xf1, 0xe5, 0x30, + } + actual := SubBytes(input) + if !bytes.Equal(expected, actual) { + t.Errorf( + "failed to get right ShiftRows:\n\texpected: % x\n\t actual: % x", + expected, + actual, + ) + } +} + +func TestSplitBytes(t *testing.T) { + input := byte(0xab) + expected1 := byte(0xa) + expected2 := byte(0xb) + actual1, actual2 := SplitBytes(input) + if expected1 != actual1 || expected2 != actual2 { + t.Errorf( + "failed to get SplitBytes:\n\texpected: 0x%x 0x%x\n\t actual: 0x%x 0x%x", + expected1, + expected2, + actual1, + actual2, + ) + } +} + +func TestXtime(t *testing.T) { + input := byte(0x14) + expected := []byte{ + 0x14, 0x28, 0x50, 0xa0, + 0x5b, 0xb6, 0x77, 0xee, + } + actual := Xtime(input) + if !bytes.Equal(expected, actual) { + t.Errorf( + "failed to get Xtime:\n\texpected: % x\n\tactual: % x", + expected, + actual, + ) + } +} + +func TestFFmult(t *testing.T) { + input := Xtime(0x14) + expected1 := byte(0x14) + expected2 := byte(0x28) + expected3 := byte(0x3c) + actual1 := FFmult(input, 1) + actual2 := FFmult(input, 2) + actual3 := FFmult(input, 3) + if expected1 != actual1 || expected2 != actual2 || expected3 != actual3 { + t.Errorf( + "failed to get FFmult:\n\texpected: 0x% x 0x% x 0x% x\n\t actual:0x% x 0x% x 0x% x", + expected1, + expected2, + expected3, + actual1, + actual2, + actual3, + ) + } +} + +func TestMixColumns(t *testing.T) { + input := Block{ + 0xdb, 0xf2, 0x2d, 0x01, + 0x13, 0x0a, 0x26, 0x01, + 0x53, 0x22, 0x31, 0x01, + 0x45, 0x5c, 0x4c, 0x01, + } + expected := Block{ + 0x8e, 0x9f, 0x4d, 0x01, + 0x4d, 0xdc, 0x7e, 0x01, + 0xa1, 0x58, 0xbd, 0x01, + 0xbc, 0x9d, 0xf8, 0x01, + } + actual := MixColumns(input) + for i := 0; i < 16; i++ { + if actual[i] != expected[i] { + t.Errorf( + "failed to get MixColumn:\n\texpected:", expected, "\n\tactual:", actual, + ) + } + } +} + +func TestCipher(t *testing.T) { + key := Block{ + 0x2b, 0x28, 0xab, 0x09, + 0x7e, 0xae, 0xf7, 0xcf, + 0x15, 0xd2, 0x15, 0x4f, + 0x16, 0xa6, 0x88, 0x3c, + } + input := Block{ + 0x32, 0x88, 0x31, 0xe0, + 0x43, 0x5a, 0x31, 0x37, + 0xf6, 0x30, 0x98, 0x07, + 0xa8, 0x8d, 0xa2, 0x34, + } + expected := Block{ + 0x39, 0x02, 0xdc, 0x19, + 0x25, 0xdc, 0x11, 0x6a, + 0x84, 0x09, 0x85, 0x0b, + 0x1d, 0xfb, 0x97, 0x32, + } + actual := Cipher(input, 128, key) + for i := 0; i < 16; i++ { + if actual[i] != expected[i] { + t.Errorf( + "failed to get Cipher:\n\texpected:", expected, "\n\tactual:", actual, + ) + } + } + + //Test case for 128 from FIPS + + key = Block{ + 0x00, 0x04, 0x08, 0x0c, + 0x01, 0x05, 0x09, 0x0d, + 0x02, 0x06, 0x0a, 0x0e, + 0x03, 0x07, 0x0b, 0x0f, + } + input = Block{ + 0x00, 0x44, 0x88, 0xcc, + 0x11, 0x55, 0x99, 0xdd, + 0x22, 0x66, 0xaa, 0xee, + 0x33, 0x77, 0xbb, 0xff, + } + expected = Block{ + 0x69, 0x6a, 0xd8, 0x70, + 0xc4, 0x7b, 0xcd, 0xb4, + 0xe0, 0x04, 0xb7, 0xc5, + 0xd8, 0x30, 0x80, 0x5a, + } + actual = Cipher(input, 128, key) + for i := 0; i < 16; i++ { + if actual[i] != expected[i] { + t.Errorf( + "failed to get Cipher:\n\texpected:", expected, "\n\tactual:", actual, + ) + } + } + + //Test case for 192 from FIPS + key = Block{ + 0x00, 0x04, 0x08, 0x0c, 0x10, 0x14, + 0x01, 0x05, 0x09, 0x0d, 0x11, 0x15, + 0x02, 0x06, 0x0a, 0x0e, 0x12, 0x16, + 0x03, 0x07, 0x0b, 0x0f, 0x13, 0x17, + } + input = Block{ + 0x00, 0x44, 0x88, 0xcc, + 0x11, 0x55, 0x99, 0xdd, + 0x22, 0x66, 0xaa, 0xee, + 0x33, 0x77, 0xbb, 0xff, + } + expected = Block{ + 0xdd, 0x86, 0x6e, 0xec, + 0xa9, 0x4c, 0xaf, 0x0d, + 0x7c, 0xdf, 0x70, 0x71, + 0xa4, 0xe0, 0xa0, 0x91, + } + actual = Cipher(input, 192, key) + for i := 0; i < 16; i++ { + if actual[i] != expected[i] { + t.Errorf( + "failed to get Cipher:\n\texpected:", expected, "\n\tactual:", actual, + ) + } + } + + //Test case for 256 from FIPS + key = Block{ + 0x00, 0x04, 0x08, 0x0c, 0x10, 0x14, 0x18, 0x1c, + 0x01, 0x05, 0x09, 0x0d, 0x11, 0x15, 0x19, 0x1d, + 0x02, 0x06, 0x0a, 0x0e, 0x12, 0x16, 0x1a, 0x1e, + 0x03, 0x07, 0x0b, 0x0f, 0x13, 0x17, 0x1b, 0x1f, + } + input = Block{ + 0x00, 0x44, 0x88, 0xcc, + 0x11, 0x55, 0x99, 0xdd, + 0x22, 0x66, 0xaa, 0xee, + 0x33, 0x77, 0xbb, 0xff, + } + expected = Block{ + 0x8e, 0x51, 0xea, 0x4b, + 0xa2, 0x67, 0xfc, 0x49, + 0xb7, 0x45, 0x49, 0x60, + 0xca, 0xbf, 0x90, 0x89, + } + actual = Cipher(input, 256, key) + for i := 0; i < 16; i++ { + if actual[i] != expected[i] { + t.Errorf( + "failed to get Cipher:\n\texpected:", expected, "\n\tactual:", actual, + ) + } + } +} + +func TestInvCipher(t *testing.T) { + key := Block{ + 0x2b, 0x28, 0xab, 0x09, + 0x7e, 0xae, 0xf7, 0xcf, + 0x15, 0xd2, 0x15, 0x4f, + 0x16, 0xa6, 0x88, 0x3c, + } + input := Block{ + 0x39, 0x02, 0xdc, 0x19, + 0x25, 0xdc, 0x11, 0x6a, + 0x84, 0x09, 0x85, 0x0b, + 0x1d, 0xfb, 0x97, 0x32, + } + expected := Block{ + 0x32, 0x88, 0x31, 0xe0, + 0x43, 0x5a, 0x31, 0x37, + 0xf6, 0x30, 0x98, 0x07, + 0xa8, 0x8d, 0xa2, 0x34, + } + actual := InvCipher(input, 128, key) + for i := 0; i < 16; i++ { + if actual[i] != expected[i] { + t.Errorf( + "failed to get Cipher:\n\texpected:", expected, "\n\tactual:", actual, + ) + } + } + + //Test case for 128 from FIPS + key = Block{ + 0x00, 0x04, 0x08, 0x0c, + 0x01, 0x05, 0x09, 0x0d, + 0x02, 0x06, 0x0a, 0x0e, + 0x03, 0x07, 0x0b, 0x0f, + } + input = Block{ + 0x69, 0x6a, 0xd8, 0x70, + 0xc4, 0x7b, 0xcd, 0xb4, + 0xe0, 0x04, 0xb7, 0xc5, + 0xd8, 0x30, 0x80, 0x5a, + } + expected = Block{ + 0x00, 0x44, 0x88, 0xcc, + 0x11, 0x55, 0x99, 0xdd, + 0x22, 0x66, 0xaa, 0xee, + 0x33, 0x77, 0xbb, 0xff, + } + actual = InvCipher(input, 128, key) + for i := 0; i < 16; i++ { + if actual[i] != expected[i] { + t.Errorf( + "failed to get Cipher:\n\texpected:", expected, "\n\tactual:", actual, + ) + } + } + + //Test case for 192 from FIPS + key = Block{ + 0x00, 0x04, 0x08, 0x0c, 0x10, 0x14, + 0x01, 0x05, 0x09, 0x0d, 0x11, 0x15, + 0x02, 0x06, 0x0a, 0x0e, 0x12, 0x16, + 0x03, 0x07, 0x0b, 0x0f, 0x13, 0x17, + } + input = Block{ + 0xdd, 0x86, 0x6e, 0xec, + 0xa9, 0x4c, 0xaf, 0x0d, + 0x7c, 0xdf, 0x70, 0x71, + 0xa4, 0xe0, 0xa0, 0x91, + } + expected = Block{ + 0x00, 0x44, 0x88, 0xcc, + 0x11, 0x55, 0x99, 0xdd, + 0x22, 0x66, 0xaa, 0xee, + 0x33, 0x77, 0xbb, 0xff, + } + actual = InvCipher(input, 192, key) + for i := 0; i < 16; i++ { + if actual[i] != expected[i] { + t.Errorf( + "failed to get Cipher:\n\texpected:", expected, "\n\tactual:", actual, + ) + } + } + + //Test case for 256 from FIPS + key = Block{ + 0x00, 0x04, 0x08, 0x0c, 0x10, 0x14, 0x18, 0x1c, + 0x01, 0x05, 0x09, 0x0d, 0x11, 0x15, 0x19, 0x1d, + 0x02, 0x06, 0x0a, 0x0e, 0x12, 0x16, 0x1a, 0x1e, + 0x03, 0x07, 0x0b, 0x0f, 0x13, 0x17, 0x1b, 0x1f, + } + input = Block{ + 0x8e, 0x51, 0xea, 0x4b, + 0xa2, 0x67, 0xfc, 0x49, + 0xb7, 0x45, 0x49, 0x60, + 0xca, 0xbf, 0x90, 0x89, + } + expected = Block{ + 0x00, 0x44, 0x88, 0xcc, + 0x11, 0x55, 0x99, 0xdd, + 0x22, 0x66, 0xaa, 0xee, + 0x33, 0x77, 0xbb, 0xff, + } + actual = InvCipher(input, 256, key) + for i := 0; i < 16; i++ { + if actual[i] != expected[i] { + t.Errorf( + "failed to get Cipher:\n\texpected:", expected, "\n\tactual:", actual, + ) + } + } +}