--- /dev/null
+/*************************************************************************\r
+** **\r
+** A E S 1 2 8 - AES-128 encryption and decryption **\r
+** **\r
+** Copyright 2008 Yubico AB **\r
+** **\r
+** Date / Sig / Rev / History **\r
+** 2008-06-05 / J E / 0.00 / Main **\r
+** **\r
+*************************************************************************/\r
+\r
+#include "aes128.h"\r
+#include <string.h>\r
+\r
+#define NUMBER_OF_ROUNDS 10\r
+\r
+static const unsigned char RC[] = \r
+ { 0x1, 0x2, 0x4, 0x8, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36 };\r
+\r
+static const unsigned char sbox[] = {\r
+ 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, \r
+ 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, \r
+ 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, \r
+ 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, \r
+ 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, \r
+ 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, \r
+ 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, \r
+ 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, \r
+ 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, \r
+ 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, \r
+ 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, \r
+ 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, \r
+ 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, \r
+ 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, \r
+ 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, \r
+ 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, \r
+ 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, \r
+ 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, \r
+ 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, \r
+ 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, \r
+ 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, \r
+ 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, \r
+ 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, \r
+ 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, \r
+ 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, \r
+ 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, \r
+ 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, \r
+ 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, \r
+ 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, \r
+ 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, \r
+ 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, \r
+ 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16\r
+};\r
+\r
+static const unsigned char inv_sbox[] = {\r
+ 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, \r
+ 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, \r
+ 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, \r
+ 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, \r
+ 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, \r
+ 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, \r
+ 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, \r
+ 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, \r
+ 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, \r
+ 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, \r
+ 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, \r
+ 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, \r
+ 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, \r
+ 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, \r
+ 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, \r
+ 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, \r
+ 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, \r
+ 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, \r
+ 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, \r
+ 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, \r
+ 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, \r
+ 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, \r
+ 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, \r
+ 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, \r
+ 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, \r
+ 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, \r
+ 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, \r
+ 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, \r
+ 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, \r
+ 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, \r
+ 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, \r
+ 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d\r
+};\r
+\r
+static unsigned char xtime(unsigned char b) { \r
+ return (b & 0x80) ? ((b << 1) ^ 0x1b) : (b << 1); \r
+}\r
+\r
+/*************************************************************************\r
+** function aesEncrypt **\r
+** Encrypts a single AES-128 block **\r
+** **\r
+** void aesEncrypt(unsigned char *state, const unsigned char *key) **\r
+** **\r
+** Where: **\r
+** "state" is state buffer, i.e. plaintext in, ciphertext out **\r
+** "key" is pointer to AES key **\r
+** **\r
+*************************************************************************/\r
+\r
+void aesEncrypt(unsigned char *state, const unsigned char *key)\r
+{\r
+ unsigned char i, j, k, tmp, round_key[0x10];\r
+\r
+ memcpy(round_key, key, sizeof(round_key));\r
+\r
+ for (i = 0; i < 16; i++) state[i] ^= key[i];\r
+\r
+ for (i = 0; i < NUMBER_OF_ROUNDS; i++) {\r
+\r
+ // byte_sub_shift_row(state);\r
+\r
+ /* First row: 0 shift, 0 4 8 12 */\r
+ state[0] = sbox[state[0]];\r
+ state[4] = sbox[state[4]];\r
+ state[8] = sbox[state[8]];\r
+ state[12] = sbox[state[12]];\r
+\r
+ /* Second row: 1 shift, 1 5 9 13 */ \r
+ tmp = state[1];\r
+ state[1] = sbox[state[5]];\r
+ state[5] = sbox[state[9]];\r
+ state[9] = sbox[state[13]];\r
+ state[13] = sbox[tmp];\r
+\r
+ /* Third row: 2 shift, 2 6 10 14 */\r
+ tmp = state[2];\r
+ state[2] = sbox[state[10]];\r
+ state[10] = sbox[tmp];\r
+ tmp = state[6];\r
+ state[6] = sbox[state[14]];\r
+ state[14] = sbox[tmp];\r
+\r
+ /* Fourth row: 3 shift, 3 7 11 15 */\r
+ tmp = state[15];\r
+ state[15] = sbox[state[11]];\r
+ state[11] = sbox[state[7]];\r
+ state[7] = sbox[state[3]];\r
+ state[3] = sbox[tmp];\r
+\r
+ if (i != (NUMBER_OF_ROUNDS - 1)) {\r
+\r
+ // mix_column(state);\r
+\r
+ for (k = 0; k < 16; k += 4) {\r
+\r
+ j = state[k] ^ state[k + 1]; \r
+ tmp = j ^ state[k + 2] ^ state[k + 3];\r
+ \r
+ j = xtime(j);\r
+\r
+ state[k] ^= (j ^ tmp);\r
+\r
+ j = state[k + 1] ^ state[k + 2];\r
+ j = xtime(j);\r
+\r
+ state[k + 1] ^= (j ^ tmp);\r
+\r
+ j = state[k + 2] ^ state[k + 3];\r
+ j = xtime(j);\r
+\r
+ state[k + 2] ^= (j ^ tmp); \r
+ state[k + 3] = state[k] ^ state[k + 1] ^ state[k + 2] ^ tmp;\r
+ }\r
+ }\r
+\r
+ round_key[0] ^= RC[i];\r
+\r
+ round_key[0] ^= sbox[round_key[13]];\r
+ round_key[1] ^= sbox[round_key[14]];\r
+ round_key[2] ^= sbox[round_key[15]];\r
+ round_key[3] ^= sbox[round_key[12]];\r
+\r
+ for (k = 4; k < 16; k++) round_key[k] ^= round_key[k - 4];\r
+\r
+ // add_round_key(state, round_key);\r
+\r
+ for (j = 0; j < 16; j++) state[j] ^= round_key[j];\r
+ }\r
+}\r
+\r
+/*************************************************************************\r
+** function aesDecrypt **\r
+** Decrypts a single AES-128 block **\r
+** **\r
+** void aesDecrypt(unsigned char *state, const unsigned char *key) **\r
+** **\r
+** Where: **\r
+** "state" is state buffer, i.e. ciphertext in, plaintext out **\r
+** "key" is pointer to AES key **\r
+** **\r
+*************************************************************************/\r
+\r
+void aesDecrypt(unsigned char *state, const unsigned char *key)\r
+{\r
+ unsigned char i, j, round_key[0x10];\r
+ unsigned char a02x, a13x;\r
+ unsigned char a02xx, a13xx;\r
+ unsigned char k1, k2;\r
+\r
+ memcpy(round_key, key, sizeof(round_key));\r
+ for (i = 0; i < NUMBER_OF_ROUNDS; i++) {\r
+ round_key[0] ^= RC[i];\r
+\r
+ round_key[0] ^= sbox[round_key[13]];\r
+ round_key[1] ^= sbox[round_key[14]];\r
+ round_key[2] ^= sbox[round_key[15]];\r
+ round_key[3] ^= sbox[round_key[12]];\r
+\r
+ for (j = 4; j < 16; j++) round_key[j] ^= round_key[j - 4]; \r
+ }\r
+ for (i = 0; i < 0x10; i++) state[i] ^= round_key[i];\r
+\r
+ for (i = 1; i <= NUMBER_OF_ROUNDS; i++) {\r
+ // inv_byte_sub_shift_row();\r
+ \r
+ /* First row: 0 shift, 0 4 8 12 */\r
+ state[0] = inv_sbox[state[0]];\r
+ state[4] = inv_sbox[state[4]];\r
+ state[8] = inv_sbox[state[8]];\r
+ state[12] = inv_sbox[state[12]];\r
+\r
+ /* Second row: -1 shift, 1 5 9 13 */ \r
+ j = state[13];\r
+ state[13] = inv_sbox[state[9]];\r
+ state[9] = inv_sbox[state[5]];\r
+ state[5] = inv_sbox[state[1]];\r
+ state[1] = inv_sbox[j];\r
+\r
+ /* Third row: -2 shift, 2 6 10 14 */\r
+ j = state[2];\r
+ state[2] = inv_sbox[state[10]];\r
+ state[10] = inv_sbox[j];\r
+ j = state[6];\r
+ state[6] = inv_sbox[state[14]];\r
+ state[14] = inv_sbox[j];\r
+\r
+ /* Fourth row: -3 shift, 3 7 11 15 */\r
+ j = state[3];\r
+ state[3] = inv_sbox[state[7]];\r
+ state[7] = inv_sbox[state[11]];\r
+ state[11] = inv_sbox[state[15]];\r
+ state[15] = inv_sbox[j];\r
+\r
+// get_inv_round_key(i);\r
+\r
+ for (j = 15; j > 3; j--) round_key[j] ^= round_key[j - 4];\r
+\r
+ round_key[0] ^= (RC[NUMBER_OF_ROUNDS - i] ^ sbox[round_key[13]]);\r
+\r
+ round_key[1] ^= sbox[round_key[14]];\r
+ round_key[2] ^= sbox[round_key[15]];\r
+ round_key[3] ^= sbox[round_key[12]];\r
+\r
+ for (j = 0; j < 16; j++) state[j] ^= round_key[j];\r
+ if (i != NUMBER_OF_ROUNDS) {\r
+ \r
+ //inv_mix_column();\r
+\r
+ for (j = 0; j < 16; j += 4) {\r
+ k1 = state[j] ^ state[j + 2];\r
+ a02x = xtime(k1);\r
+ k2 = state[j + 1] ^ state[j + 3];\r
+ a13x = xtime(k2);\r
+ \r
+ k1 ^= (k2 ^ xtime(state[j + 1] ^ state[j + 2]));\r
+ k2 = k1;\r
+\r
+ a02xx = xtime(a02x);\r
+ a13xx = xtime(a13x);\r
+\r
+ k1 ^= (xtime(a02xx ^ a13xx) ^ a02xx);\r
+ k2 ^= (xtime(a02xx ^ a13xx) ^ a13xx);\r
+\r
+ state[j] ^= (k1 ^ a02x);\r
+ state[j + 1] ^= k2;\r
+ state[j + 2] ^= (k1 ^ a13x);\r
+ state[j + 3] ^= (k2 ^ a02x ^ a13x);\r
+ }\r
+ }\r
+\r
+ }\r
+}\r
projects / yubikey-personalization.old / commitdiff