From 2b847de04886e6d66a34c1f4129a77b91bd36a57 Mon Sep 17 00:00:00 2001 From: y4my4my4m <8145020+y4my4my4m@users.noreply.github.com> Date: Thu, 28 Dec 2023 05:28:23 -0500 Subject: [PATCH] AES128 --- src/Home/AES128/AES128.ZC | 323 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 323 insertions(+) create mode 100644 src/Home/AES128/AES128.ZC diff --git a/src/Home/AES128/AES128.ZC b/src/Home/AES128/AES128.ZC new file mode 100644 index 00000000..163d4886 --- /dev/null +++ b/src/Home/AES128/AES128.ZC @@ -0,0 +1,323 @@ +#define Nb 4 +#define Nk 4 +#define Nr 10 // amount of rounds to expand the key + +// could be calculated on the fly too... i guess +// https://en.wikipedia.org/wiki/Rijndael_S-box +U8 sBox[256] = { + //0 1 2 3 4 5 6 7 8 9 A B C D E F + 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 +}; + +// U8 reverse_sBox[256] = { +// 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 +// }; + +U8 Rcon[255] = { + 0x8d, 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, 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, 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, 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, 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 +}; + +// Mul2 and Mul3 could be precomputed, but here's a simple implementation +// Note: This is a simplified and not optimized version +U8 xtime(U8 x) { + return (x << 1) ^ (((x >> 7) & 1) * 0x1b); +} + +U8 Mul2[256], Mul3[256]; + +U0 InitMulTables() { + I64 i; + for (i = 0; i < 256; i++) { + Mul2[i] = xtime(i); + Mul3[i] = xtime(i) ^ i; + } +} + +U0 KeyExpansion(U8 *RoundKey, U8 *Key) { + I64 i, j; + // Copy the original key to the round key + for (i = 0; i < Nk; i++) { + RoundKey[(i * 4) + 0] = Key[(i * 4) + 0]; + RoundKey[(i * 4) + 1] = Key[(i * 4) + 1]; + RoundKey[(i * 4) + 2] = Key[(i * 4) + 2]; + RoundKey[(i * 4) + 3] = Key[(i * 4) + 3]; + } + + // Expand the round key + for (i = Nk; i < Nb * (Nr + 1); i++) { + U8 temp[4]; + for (j = 0; j < 4; j++) { + temp[j] = RoundKey[(i-1) * 4 + j]; + } + + if (i % Nk == 0) { + // Perform the rotation within temp array, substitute with S-box, then XOR with Rcon[i/Nk] + I64 k = temp[0]; // should be I64 but kept throwing a warning about 64bit variable somehow??? + k = k & 0xff; // this is an attempt at forcing U8 + temp[0] = sBox[temp[1]] ^ Rcon[i/Nk]; + temp[1] = sBox[temp[2]]; + temp[2] = sBox[temp[3]]; + temp[3] = sBox[k]; + } + + for (j = 0; j < 4; j++) { + RoundKey[i * 4 + j] = RoundKey[(i - Nk) * 4 + j] ^ temp[j]; + } + } +} + +U0 AddRoundKey(U8 round, U8 *state, U8 *RoundKey) { + I64 i,j; + for (i = 0; i < 4; i++) { + for (j = 0; j < 4; j++) { + state[j * 4 + i] ^= RoundKey[round * Nb * 4 + i * Nb + j]; + } + } +} + +U0 SubBytes(U8 *state) { + I64 i; + for (i = 0; i < 16; i++) { + state[i] = sBox[state[i]]; + } +} + +U0 ShiftRows(U8 *state) { + I64 i; + U8 temp[16]; + + // Store state in temp + for (i = 0; i < 16; i++) { + temp[i] = state[i]; + } + + // Shift first row 1 columns to left + state[0] = temp[0]; + state[4] = temp[5]; + state[8] = temp[10]; + state[12] = temp[15]; + + // Shift third row 2 steps to the left + state[2] = temp[10]; + state[6] = temp[14]; + state[10] = temp[2]; + state[14] = temp[6]; + + // Shift fourth row 3 steps to the left + state[3] = temp[15]; + state[7] = temp[3]; + state[11] = temp[7]; + state[15] = temp[11]; +} + +U0 MixColumns(U8 *state) { + U8 temp[16]; + I64 i; + + // Store state in temp + for (i = 0; i < 16; i++) { + temp[i] = state[i]; + } + + for (i = 0; i < 4; i++) { + state[i * 4 + 0] = Mul2[temp[i * 4 + 0]] ^ Mul3[temp[i * 4 + 1]] ^ temp[i * 4 + 2] ^ temp[i * 4 + 3]; + state[i * 4 + 1] = temp[i * 4 + 0] ^ Mul2[temp[i * 4 + 1]] ^ Mul3[temp[i * 4 + 2]] ^ temp[i * 4 + 3]; + state[i * 4 + 2] = temp[i * 4 + 0] ^ temp[i * 4 + 1] ^ Mul2[temp[i * 4 + 2]] ^ Mul3[temp[i * 4 + 3]]; + state[i * 4 + 3] = Mul3[temp[i * 4 + 0]] ^ temp[i * 4 + 1] ^ temp[i * 4 + 2] ^ Mul2[temp[i * 4 + 3]]; + } +} + +// U0 InvSubBytes(U8 *state) { +// // Implement inverse of SubBytes +// } + +// U0 InvShiftRows(U8 *state) { +// // Implement inverse of ShiftRows +// } + +// U0 InvMixColumns(U8 *state) { +// // Implement inverse of MixColumns +// } + +// U0 InvCipher(U8 *state, U8 *RoundKey) { +// I64 round; +// // Start by adding the last round key +// AddRoundKey(Nr, state, RoundKey); + +// // Perform the rounds in reverse order +// for (round = Nr - 1; round > 0; round--) { +// InvShiftRows(state); +// InvSubBytes(state); +// AddRoundKey(round, state, RoundKey); +// InvMixColumns(state); +// } + +// // Final round (without MixColumns) +// InvShiftRows(state); +// InvSubBytes(state); +// AddRoundKey(0, state, RoundKey); +// } + +U0 Cipher(U8 *state, U8 *RoundKey) { + I64 round; + // Add the First round key to the state before starting the rounds + AddRoundKey(0, state, RoundKey); + + // There will be Nr rounds + for (round = 1; round < Nr; ++round) { + SubBytes(state); + ShiftRows(state); + MixColumns(state); + AddRoundKey(round, state, RoundKey); + } + + // The last round is given below + SubBytes(state); + ShiftRows(state); + AddRoundKey(Nr, state, RoundKey); +} + +U0 AES_init_ctx(U8 *ctx, U8 *key) { + KeyExpansion(ctx, key); +} + +U0 AES_ECB_encrypt(U8 *ctx, U8 *buf) { + // Buffer size is assumed to be multiple of 16 bytes! (AES block size) + Cipher(buf, ctx); +} + +// U0 AES_ECB_decrypt(U8 *ctx, U8 *buf) { +// InvCipher(buf, ctx); +// } + +U0 PrintHex(U8 *buf, I64 len) { + I64 i; + for (i = 0; i < len; i++) "%02X ", buf[i]; + "\n"; +} + +U8 HexCharToByte(U8 ch) { + if (ch >= '0' && ch <= '9') return ch - '0'; + if (ch >= 'a' && ch <= 'f') return 10 + ch - 'a'; + if (ch >= 'A' && ch <= 'F') return 10 + ch - 'A'; + return 0; // Non-hex character +} + +U0 HexStringToByteArray(U8 *hexString, U8 *byteArray, I64 byteArrayLength) { + I64 i; + for (i = 0; i < byteArrayLength; i++) { + byteArray[i] = HexCharToByte(hexString[2*i]) << 4 | HexCharToByte(hexString[2*i + 1]); + } +} + +// 9d3492551250741cef1bf7892fabd07b +U8 key[16] = {0x9d, 0x34, 0x92, 0x55, 0x12, 0x50, 0x74, 0x1c, 0xef, 0x1b, 0xf7, 0x89, 0x2f, 0xab, 0xd0, 0x7b}; +// 0c40d19e21ac91fad03b1a8e5349f245 +U8 buf[16] = {0x0c, 0x40, 0xd1, 0x9e, 0x21, 0xac, 0x91, 0xfa, 0xd0, 0x3b, 0x1a, 0x8e, 0x53, 0x49, 0xf2, 0x45}; + +U0 Main() { + U8 ctx[176]; // Context (expanded key) + + InitMulTables(); + + AES_init_ctx(ctx, key); + AES_ECB_encrypt(ctx, buf); + + // `buf` now contains the ciphertext + "Result:\n$$LTRED$$"; + PrintHex(buf, 16); + "\n$$FG$$"; +} + +Main; + + +// U0 Main() { + +// U8 ctx[176]; // Context (expanded key) + +// InitMulTables; + +// AES_init_ctx(ctx, key); + +// "ctx:\n"; +// PrintHex(ctx, 176); +// "\n"; + +// AES_ECB_encrypt(ctx, buf); +// "buf:\n$$LTGREEN$$"; +// PrintHex(buf, 16); +// "\n$$FG$$"; +// } +// Main; + +// // 9d3492551250741cef1bf7892fabd07b +// U8 key[16] = {0x9d, 0x34, 0x92, 0x55, 0x12, 0x50, 0x74, 0x1c, 0xef, 0x1b, 0xf7, 0x89, 0x2f, 0xab, 0xd0, 0x7b}; +// // 0c40d19e21ac91fad03b1a8e5349f245 +// U8 buf[16] = {0x0c, 0x40, 0xd1, 0x9e, 0x21, 0xac, 0x91, 0xfa, 0xd0, 0x3b, 0x1a, 0x8e, 0x53, 0x49, 0xf2, 0x45}; + +// U0 Main(U8 *keyHexString, U8 *plaintextHexString) { + +// U8 ctx[176]; // Context (expanded key) + +// InitMulTables(); + +// // Convert hex string to byte array for the key +// HexStringToByteArray(keyHexString, key, 16); + +// // Convert hex string to byte array for the plaintext +// HexStringToByteArray(plaintextHexString, buf, 16); + +// AES_init_ctx(ctx, key); +// AES_ECB_encrypt(ctx, buf); + +// // `buf` now contains the ciphertext +// PrintHex(buf, 16); +// } + +// // Main("9d3492551250741cef1bf7892fabd07b", "0c40d19e21ac91fad03b1a8e5349f245"); \ No newline at end of file