/* Original: https://github.com/kokke/tiny-AES-c */ /* This is an implementation of the AES algorithm, specifically ECB, CTR and CBC mode. Block size can be chosen in aes.h - available choices are AES128, AES192, AES256. The implementation is verified against the test vectors in: National Institute of Standards and Technology Special Publication 800-38A 2001 ED ECB-AES128 ---------- plain-text: 6bc1bee22e409f96e93d7e117393172a ae2d8a571e03ac9c9eb76fac45af8e51 30c81c46a35ce411e5fbc1191a0a52ef f69f2445df4f9b17ad2b417be66c3710 key: 2b7e151628aed2a6abf7158809cf4f3c resulting cipher 3ad77bb40d7a3660a89ecaf32466ef97 f5d3d58503b9699de785895a96fdbaaf 43b1cd7f598ece23881b00e3ed030688 7b0c785e27e8ad3f8223207104725dd4 NOTE: String length must be evenly divisible by 16byte (str_len % 16 == 0) You should pad the end of the string with zeros if this is not the case. For AES192/256 the key size is proportionally larger. */ /*****************************************************************************/ /* Includes: */ /*****************************************************************************/ #include "aes.hpp" /*****************************************************************************/ /* Defines: */ /*****************************************************************************/ // The number of columns comprising a state in AES. This is a constant in AES. Value=4 #define Nb 4 #define Nk128 4 // The number of 32 bit words in a key. #define Nr128 10 // The number of rounds in AES Cipher. #define Nk192 6 #define Nr192 12 #define Nk256 8 #define Nr256 14 // jcallan@github points out that declaring Multiply as a function // reduces code size considerably with the Keil ARM compiler. // See this link for more information: https://github.com/kokke/tiny-AES-C/pull/3 #ifndef MULTIPLY_AS_A_FUNCTION #define MULTIPLY_AS_A_FUNCTION 0 #endif /*****************************************************************************/ /* Private variables: */ /*****************************************************************************/ // state - array holding the intermediate results during decryption. typedef uint8_t state_t[4][4]; // The lookup-tables are marked const so they can be placed in read-only storage instead of RAM // The numbers below can be computed dynamically trading ROM for RAM - // This can be useful in (embedded) bootloader applications, where ROM is often limited. static const uint8_t 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 }; static const uint8_t rsbox[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 }; // The round constant word array, Rcon[i], contains the values given by // x to the power (i-1) being powers of x (x is denoted as {02}) in the field GF(2^8) static const uint8_t Rcon[11] = { 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36 }; /* * Jordan Goulder points out in PR #12 (https://github.com/kokke/tiny-AES-C/pull/12), * that you can remove most of the elements in the Rcon array, because they are unused. * * From Wikipedia's article on the Rijndael key schedule @ https://en.wikipedia.org/wiki/Rijndael_key_schedule#Rcon * * "Only the first some of these constants are actually used - up to rcon[10] for AES-128 (as 11 round keys are needed), * up to rcon[8] for AES-192, up to rcon[7] for AES-256. rcon[0] is not used in AES algorithm." */ extern bool aes_ni; // This function produces Nb(Nr+1) round keys. The round keys are used in each round to decrypt the states. static void key_expansion_aes128(uint8_t* RoundKey, const uint8_t* Key) { unsigned i, j, k; uint8_t tempa[4]; // Used for the column/row operations // The first round key is the key itself. for (i = 0; i < Nk128; ++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]; } // All other round keys are found from the previous round keys. for (i = Nk128; i < Nb * (Nr128 + 1); ++i) { { k = (i - 1) * 4; tempa[0] = RoundKey[k + 0]; tempa[1] = RoundKey[k + 1]; tempa[2] = RoundKey[k + 2]; tempa[3] = RoundKey[k + 3]; } if (i % Nk128 == 0) { // This function shifts the 4 bytes in a word to the left once. // [a0,a1,a2,a3] becomes [a1,a2,a3,a0] // Function RotWord() { const uint8_t u8tmp = tempa[0]; tempa[0] = tempa[1]; tempa[1] = tempa[2]; tempa[2] = tempa[3]; tempa[3] = u8tmp; } // SubWord() is a function that takes a four-byte input word and // applies the S-box to each of the four bytes to produce an output word. // Function Subword() { tempa[0] = sbox[tempa[0]]; tempa[1] = sbox[tempa[1]]; tempa[2] = sbox[tempa[2]]; tempa[3] = sbox[tempa[3]]; } tempa[0] = tempa[0] ^ Rcon[i / Nk128]; } j = i * 4; k = (i - Nk128) * 4; RoundKey[j + 0] = RoundKey[k + 0] ^ tempa[0]; RoundKey[j + 1] = RoundKey[k + 1] ^ tempa[1]; RoundKey[j + 2] = RoundKey[k + 2] ^ tempa[2]; RoundKey[j + 3] = RoundKey[k + 3] ^ tempa[3]; } } static void key_expansion_aes192(uint8_t* RoundKey, const uint8_t* Key) { unsigned i, j, k; uint8_t tempa[4]; // Used for the column/row operations // The first round key is the key itself. for (i = 0; i < Nk192; ++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]; } // All other round keys are found from the previous round keys. for (i = Nk192; i < Nb * (Nr192 + 1); ++i) { { k = (i - 1) * 4; tempa[0] = RoundKey[k + 0]; tempa[1] = RoundKey[k + 1]; tempa[2] = RoundKey[k + 2]; tempa[3] = RoundKey[k + 3]; } if (i % Nk192 == 0) { // This function shifts the 4 bytes in a word to the left once. // [a0,a1,a2,a3] becomes [a1,a2,a3,a0] // Function RotWord() { const uint8_t u8tmp = tempa[0]; tempa[0] = tempa[1]; tempa[1] = tempa[2]; tempa[2] = tempa[3]; tempa[3] = u8tmp; } // SubWord() is a function that takes a four-byte input word and // applies the S-box to each of the four bytes to produce an output word. // Function Subword() { tempa[0] = sbox[tempa[0]]; tempa[1] = sbox[tempa[1]]; tempa[2] = sbox[tempa[2]]; tempa[3] = sbox[tempa[3]]; } tempa[0] = tempa[0] ^ Rcon[i / Nk192]; } j = i * 4; k = (i - Nk192) * 4; RoundKey[j + 0] = RoundKey[k + 0] ^ tempa[0]; RoundKey[j + 1] = RoundKey[k + 1] ^ tempa[1]; RoundKey[j + 2] = RoundKey[k + 2] ^ tempa[2]; RoundKey[j + 3] = RoundKey[k + 3] ^ tempa[3]; } } static void key_expansion_aes256(uint8_t* RoundKey, const uint8_t* Key) { unsigned i, j, k; uint8_t tempa[4]; // Used for the column/row operations // The first round key is the key itself. for (i = 0; i < Nk256; ++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]; } // All other round keys are found from the previous round keys. for (i = Nk256; i < Nb * (Nr256 + 1); ++i) { { k = (i - 1) * 4; tempa[0] = RoundKey[k + 0]; tempa[1] = RoundKey[k + 1]; tempa[2] = RoundKey[k + 2]; tempa[3] = RoundKey[k + 3]; } if (i % Nk256 == 0) { // This function shifts the 4 bytes in a word to the left once. // [a0,a1,a2,a3] becomes [a1,a2,a3,a0] // Function RotWord() { const uint8_t u8tmp = tempa[0]; tempa[0] = tempa[1]; tempa[1] = tempa[2]; tempa[2] = tempa[3]; tempa[3] = u8tmp; } // SubWord() is a function that takes a four-byte input word and // applies the S-box to each of the four bytes to produce an output word. // Function Subword() { tempa[0] = sbox[tempa[0]]; tempa[1] = sbox[tempa[1]]; tempa[2] = sbox[tempa[2]]; tempa[3] = sbox[tempa[3]]; } tempa[0] = tempa[0] ^ Rcon[i / Nk256]; } if (i % Nk256 == 4) { // Function Subword() { tempa[0] = sbox[tempa[0]]; tempa[1] = sbox[tempa[1]]; tempa[2] = sbox[tempa[2]]; tempa[3] = sbox[tempa[3]]; } } j = i * 4; k = (i - Nk256) * 4; RoundKey[j + 0] = RoundKey[k + 0] ^ tempa[0]; RoundKey[j + 1] = RoundKey[k + 1] ^ tempa[1]; RoundKey[j + 2] = RoundKey[k + 2] ^ tempa[2]; RoundKey[j + 3] = RoundKey[k + 3] ^ tempa[3]; } } inline static __m128i key_expansion_aes128_ni_assist(__m128i temp1, __m128i temp2) { __m128i temp3; temp2 = _mm_shuffle_epi32(temp2, 0xFF); temp3 = _mm_slli_si128(temp1, 0x04); temp1 = _mm_xor_si128(temp1, temp3); temp3 = _mm_slli_si128(temp3, 0x04); temp1 = _mm_xor_si128(temp1, temp3); temp3 = _mm_slli_si128(temp3, 0x04); temp1 = _mm_xor_si128(temp1, temp3); temp1 = _mm_xor_si128(temp1, temp2); return temp1; } static void key_expansion_aes128_ni(__m128i* RoundKey, const uint8_t* Key) { __m128i temp1, temp2; temp1 = _mm_loadu_si128((__m128i*)&Key[0]); RoundKey[0] = temp1; temp2 = _mm_aeskeygenassist_si128(temp1, 0x01); temp1 = key_expansion_aes128_ni_assist(temp1, temp2); RoundKey[1] = temp1; temp2 = _mm_aeskeygenassist_si128(temp1, 0x02); temp1 = key_expansion_aes128_ni_assist(temp1, temp2); RoundKey[2] = temp1; temp2 = _mm_aeskeygenassist_si128(temp1, 0x04); temp1 = key_expansion_aes128_ni_assist(temp1, temp2); RoundKey[3] = temp1; temp2 = _mm_aeskeygenassist_si128(temp1, 0x08); temp1 = key_expansion_aes128_ni_assist(temp1, temp2); RoundKey[4] = temp1; temp2 = _mm_aeskeygenassist_si128(temp1, 0x10); temp1 = key_expansion_aes128_ni_assist(temp1, temp2); RoundKey[5] = temp1; temp2 = _mm_aeskeygenassist_si128(temp1, 0x20); temp1 = key_expansion_aes128_ni_assist(temp1, temp2); RoundKey[6] = temp1; temp2 = _mm_aeskeygenassist_si128(temp1, 0x40); temp1 = key_expansion_aes128_ni_assist(temp1, temp2); RoundKey[7] = temp1; temp2 = _mm_aeskeygenassist_si128(temp1, 0x80); temp1 = key_expansion_aes128_ni_assist(temp1, temp2); RoundKey[8] = temp1; temp2 = _mm_aeskeygenassist_si128(temp1, 0x1B); temp1 = key_expansion_aes128_ni_assist(temp1, temp2); RoundKey[9] = temp1; temp2 = _mm_aeskeygenassist_si128(temp1, 0x36); temp1 = key_expansion_aes128_ni_assist(temp1, temp2); RoundKey[10] = temp1; RoundKey[11] = _mm_aesimc_si128(RoundKey[9]); RoundKey[12] = _mm_aesimc_si128(RoundKey[8]); RoundKey[13] = _mm_aesimc_si128(RoundKey[7]); RoundKey[14] = _mm_aesimc_si128(RoundKey[6]); RoundKey[15] = _mm_aesimc_si128(RoundKey[5]); RoundKey[16] = _mm_aesimc_si128(RoundKey[4]); RoundKey[17] = _mm_aesimc_si128(RoundKey[3]); RoundKey[18] = _mm_aesimc_si128(RoundKey[2]); RoundKey[19] = _mm_aesimc_si128(RoundKey[1]); } inline static void key_expansion_aes192_ni_assist(__m128i* temp1, __m128i* temp2, __m128i* temp3) { __m128i temp4; *temp2 = _mm_shuffle_epi32(*temp2, 0x55); temp4 = _mm_slli_si128(*temp1, 0x04); *temp1 = _mm_xor_si128(*temp1, temp4); temp4 = _mm_slli_si128(temp4, 0x04); *temp1 = _mm_xor_si128(*temp1, temp4); temp4 = _mm_slli_si128(temp4, 0x04); *temp1 = _mm_xor_si128(*temp1, temp4); *temp1 = _mm_xor_si128(*temp1, *temp2); *temp2 = _mm_shuffle_epi32(*temp1, 0xFF); temp4 = _mm_slli_si128(*temp3, 0x04); *temp3 = _mm_xor_si128(*temp3, temp4); *temp3 = _mm_xor_si128(*temp3, *temp2); } static void key_expansion_aes192_ni(__m128i* RoundKey, const uint8_t* Key) { __m128i temp1, temp2, temp3; temp1 = _mm_loadu_si128((__m128i*)&Key[0]); temp3 = _mm_loadu_si128((__m128i*)&Key[16]); RoundKey[0] = temp1; RoundKey[1] = temp3; temp2 = _mm_aeskeygenassist_si128(temp3, 0x01); key_expansion_aes192_ni_assist(&temp1, &temp2, &temp3); *(__m128d*)& RoundKey[1] = _mm_shuffle_pd(*(__m128d*)&RoundKey[1], *(__m128d*)&temp1, 0); *(__m128d*)& RoundKey[2] = _mm_shuffle_pd(*(__m128d*)&temp1, *(__m128d*)&temp3, 1); temp2 = _mm_aeskeygenassist_si128(temp3, 0x02); key_expansion_aes192_ni_assist(&temp1, &temp2, &temp3); RoundKey[3] = temp1; RoundKey[4] = temp3; temp2 = _mm_aeskeygenassist_si128(temp3, 0x04); key_expansion_aes192_ni_assist(&temp1, &temp2, &temp3); *(__m128d*)& RoundKey[4] = _mm_shuffle_pd(*(__m128d*)&RoundKey[4], *(__m128d*)&temp1, 0); *(__m128d*)& RoundKey[5] = _mm_shuffle_pd(*(__m128d*)&temp1, *(__m128d*)&temp3, 1); temp2 = _mm_aeskeygenassist_si128(temp3, 0x08); key_expansion_aes192_ni_assist(&temp1, &temp2, &temp3); RoundKey[6] = temp1; RoundKey[7] = temp3; temp2 = _mm_aeskeygenassist_si128(temp3, 0x10); key_expansion_aes192_ni_assist(&temp1, &temp2, &temp3); *(__m128d*)& RoundKey[7] = _mm_shuffle_pd(*(__m128d*)&RoundKey[7], *(__m128d*)&temp1, 0); *(__m128d*)& RoundKey[8] = _mm_shuffle_pd(*(__m128d*)&temp1, *(__m128d*)&temp3, 1); temp2 = _mm_aeskeygenassist_si128(temp3, 0x20); key_expansion_aes192_ni_assist(&temp1, &temp2, &temp3); RoundKey[9] = temp1; RoundKey[10] = temp3; temp2 = _mm_aeskeygenassist_si128(temp3, 0x40); key_expansion_aes192_ni_assist(&temp1, &temp2, &temp3); *(__m128d*)& RoundKey[10] = _mm_shuffle_pd(*(__m128d*)&RoundKey[10], *(__m128d*)&temp1, 0); *(__m128d*)& RoundKey[11] = _mm_shuffle_pd(*(__m128d*)&temp1, *(__m128d*)&temp3, 1); temp2 = _mm_aeskeygenassist_si128(temp3, 0x80); key_expansion_aes192_ni_assist(&temp1, &temp2, &temp3); RoundKey[12] = temp1; RoundKey[13] = _mm_aesimc_si128(RoundKey[11]); RoundKey[14] = _mm_aesimc_si128(RoundKey[10]); RoundKey[15] = _mm_aesimc_si128(RoundKey[9]); RoundKey[16] = _mm_aesimc_si128(RoundKey[8]); RoundKey[17] = _mm_aesimc_si128(RoundKey[7]); RoundKey[18] = _mm_aesimc_si128(RoundKey[6]); RoundKey[19] = _mm_aesimc_si128(RoundKey[5]); RoundKey[20] = _mm_aesimc_si128(RoundKey[4]); RoundKey[21] = _mm_aesimc_si128(RoundKey[3]); RoundKey[22] = _mm_aesimc_si128(RoundKey[2]); RoundKey[23] = _mm_aesimc_si128(RoundKey[1]); } inline static void key_expansion_aes256_ni_assist_1(__m128i* temp1, __m128i* temp2) { __m128i temp4; *temp2 = _mm_shuffle_epi32(*temp2, 0xFF); temp4 = _mm_slli_si128(*temp1, 0x04); *temp1 = _mm_xor_si128(*temp1, temp4); temp4 = _mm_slli_si128(temp4, 0x04); *temp1 = _mm_xor_si128(*temp1, temp4); temp4 = _mm_slli_si128(temp4, 0x04); *temp1 = _mm_xor_si128(*temp1, temp4); *temp1 = _mm_xor_si128(*temp1, *temp2); } inline static void key_expansion_aes256_ni_assist_2(__m128i* temp1, __m128i* temp3) { __m128i temp2, temp4; temp4 = _mm_aeskeygenassist_si128(*temp1, 0x00); temp2 = _mm_shuffle_epi32(temp4, 0xAA); temp4 = _mm_slli_si128(*temp3, 0x04); *temp3 = _mm_xor_si128(*temp3, temp4); temp4 = _mm_slli_si128(temp4, 0x04); *temp3 = _mm_xor_si128(*temp3, temp4); temp4 = _mm_slli_si128(temp4, 0x04); *temp3 = _mm_xor_si128(*temp3, temp4); *temp3 = _mm_xor_si128(*temp3, temp2); } static void key_expansion_aes256_ni(__m128i* RoundKey, const uint8_t* Key) { __m128i temp1, temp2, temp3; temp1 = _mm_loadu_si128((__m128i*)&Key[0]); temp3 = _mm_loadu_si128((__m128i*)&Key[16]); RoundKey[0] = temp1; RoundKey[1] = temp3; temp2 = _mm_aeskeygenassist_si128(temp3, 0x01); key_expansion_aes256_ni_assist_1(&temp1, &temp2); RoundKey[2] = temp1; key_expansion_aes256_ni_assist_2(&temp1, &temp3); RoundKey[3] = temp3; temp2 = _mm_aeskeygenassist_si128(temp3, 0x02); key_expansion_aes256_ni_assist_1(&temp1, &temp2); RoundKey[4] = temp1; key_expansion_aes256_ni_assist_2(&temp1, &temp3); RoundKey[5] = temp3; temp2 = _mm_aeskeygenassist_si128(temp3, 0x04); key_expansion_aes256_ni_assist_1(&temp1, &temp2); RoundKey[6] = temp1; key_expansion_aes256_ni_assist_2(&temp1, &temp3); RoundKey[7] = temp3; temp2 = _mm_aeskeygenassist_si128(temp3, 0x08); key_expansion_aes256_ni_assist_1(&temp1, &temp2); RoundKey[8] = temp1; key_expansion_aes256_ni_assist_2(&temp1, &temp3); RoundKey[9] = temp3; temp2 = _mm_aeskeygenassist_si128(temp3, 0x10); key_expansion_aes256_ni_assist_1(&temp1, &temp2); RoundKey[10] = temp1; key_expansion_aes256_ni_assist_2(&temp1, &temp3); RoundKey[11] = temp3; temp2 = _mm_aeskeygenassist_si128(temp3, 0x20); key_expansion_aes256_ni_assist_1(&temp1, &temp2); RoundKey[12] = temp1; key_expansion_aes256_ni_assist_2(&temp1, &temp3); RoundKey[13] = temp3; temp2 = _mm_aeskeygenassist_si128(temp3, 0x40); key_expansion_aes256_ni_assist_1(&temp1, &temp2); RoundKey[14] = temp1; RoundKey[15] = _mm_aesimc_si128(RoundKey[13]); RoundKey[16] = _mm_aesimc_si128(RoundKey[12]); RoundKey[17] = _mm_aesimc_si128(RoundKey[11]); RoundKey[18] = _mm_aesimc_si128(RoundKey[10]); RoundKey[19] = _mm_aesimc_si128(RoundKey[9]); RoundKey[20] = _mm_aesimc_si128(RoundKey[8]); RoundKey[21] = _mm_aesimc_si128(RoundKey[7]); RoundKey[22] = _mm_aesimc_si128(RoundKey[6]); RoundKey[23] = _mm_aesimc_si128(RoundKey[5]); RoundKey[24] = _mm_aesimc_si128(RoundKey[4]); RoundKey[25] = _mm_aesimc_si128(RoundKey[3]); RoundKey[26] = _mm_aesimc_si128(RoundKey[2]); RoundKey[27] = _mm_aesimc_si128(RoundKey[1]); } void aes128_init_ctx(aes128_ctx* ctx, const uint8_t* key) { if (aes_ni) key_expansion_aes128_ni(ctx->RoundKeyNI, key); else key_expansion_aes128(ctx->RoundKey, key); } void aes192_init_ctx(aes192_ctx* ctx, const uint8_t* key) { if (aes_ni) key_expansion_aes192_ni(ctx->RoundKeyNI, key); else key_expansion_aes192(ctx->RoundKey, key); } void aes256_init_ctx(aes256_ctx* ctx, const uint8_t* key) { if (aes_ni) key_expansion_aes256_ni(ctx->RoundKeyNI, key); else key_expansion_aes256(ctx->RoundKey, key); } void aes128_init_ctx_iv(aes128_ctx* ctx, const uint8_t* key, const uint8_t* iv) { if (aes_ni) key_expansion_aes128_ni(ctx->RoundKeyNI, key); else key_expansion_aes128(ctx->RoundKey, key); memcpy(ctx->Iv, iv, AES_BLOCKLEN); } void aes192_init_ctx_iv(aes192_ctx* ctx, const uint8_t* key, const uint8_t* iv) { if (aes_ni) key_expansion_aes192_ni(ctx->RoundKeyNI, key); else key_expansion_aes192(ctx->RoundKey, key); memcpy(ctx->Iv, iv, AES_BLOCKLEN); } void aes256_init_ctx_iv(aes256_ctx* ctx, const uint8_t* key, const uint8_t* iv) { if (aes_ni) key_expansion_aes256_ni(ctx->RoundKeyNI, key); else key_expansion_aes256(ctx->RoundKey, key); memcpy(ctx->Iv, iv, AES_BLOCKLEN); } void aes128_ctx_set_iv(aes128_ctx* ctx, const uint8_t* iv) { memcpy(ctx->Iv, iv, AES_BLOCKLEN); } void aes192_ctx_set_iv(aes192_ctx* ctx, const uint8_t* iv) { memcpy(ctx->Iv, iv, AES_BLOCKLEN); } void aes256_ctx_set_iv(aes256_ctx* ctx, const uint8_t* iv) { memcpy(ctx->Iv, iv, AES_BLOCKLEN); } // This function adds the round key to state. // The round key is added to the state by an XOR function. inline static void add_round_key(uint8_t round, state_t* state, const uint8_t* RoundKey) { uint8_t i, j; for (i = 0; i < 4; ++i) for (j = 0; j < 4; ++j) (*state)[i][j] ^= RoundKey[(round * Nb * 4) + (i * Nb) + j]; } // The SubBytes Function Substitutes the values in the // state matrix with values in an S-box. inline static void sub_bytes(state_t* state) { uint8_t i, j; for (i = 0; i < 4; ++i) for (j = 0; j < 4; ++j) (*state)[j][i] = sbox[(*state)[j][i]]; } // The ShiftRows() function shifts the rows in the state to the left. // Each row is shifted with different offset. // Offset = Row number. So the first row is not shifted. inline static void shift_rows(state_t* state) { uint8_t temp; // Rotate first row 1 columns to left temp = (*state)[0][1]; (*state)[0][1] = (*state)[1][1]; (*state)[1][1] = (*state)[2][1]; (*state)[2][1] = (*state)[3][1]; (*state)[3][1] = temp; // Rotate second row 2 columns to left temp = (*state)[0][2]; (*state)[0][2] = (*state)[2][2]; (*state)[2][2] = temp; temp = (*state)[1][2]; (*state)[1][2] = (*state)[3][2]; (*state)[3][2] = temp; // Rotate third row 3 columns to left temp = (*state)[0][3]; (*state)[0][3] = (*state)[3][3]; (*state)[3][3] = (*state)[2][3]; (*state)[2][3] = (*state)[1][3]; (*state)[1][3] = temp; } inline static uint8_t xtime(uint8_t x) { return ((x<<1) ^ (((x>>7) & 1) * 0x1b)); } // MixColumns function mixes the columns of the state matrix inline static void mix_columns(state_t* state) { uint8_t i; uint8_t Tmp, Tm, t; for (i = 0; i < 4; ++i) { t = (*state)[i][0]; Tmp = (*state)[i][0] ^ (*state)[i][1] ^ (*state)[i][2] ^ (*state)[i][3] ; Tm = (*state)[i][0] ^ (*state)[i][1] ; Tm = xtime(Tm); (*state)[i][0] ^= Tm ^ Tmp ; Tm = (*state)[i][1] ^ (*state)[i][2] ; Tm = xtime(Tm); (*state)[i][1] ^= Tm ^ Tmp ; Tm = (*state)[i][2] ^ (*state)[i][3] ; Tm = xtime(Tm); (*state)[i][2] ^= Tm ^ Tmp ; Tm = (*state)[i][3] ^ t ; Tm = xtime(Tm); (*state)[i][3] ^= Tm ^ Tmp ; } } inline static uint8_t Multiply(uint8_t x, uint8_t y) { return ((y & 1) * x) ^ (((y >> 1) & 0x01) * xtime(x)) ^ (((y >> 2) & 0x01) * xtime(xtime(x))) ^ (((y >> 3) & 0x01) * xtime(xtime(xtime(x)))); } // MixColumns function mixes the columns of the state matrix. // The method used to multiply may be difficult to understand for the inexperienced. // Please use the references to gain more information. inline static void inv_mix_columns(state_t* state) { int32_t i; uint8_t a, b, c, d; for (i = 0; i < 4; ++i) { a = (*state)[i][0]; b = (*state)[i][1]; c = (*state)[i][2]; d = (*state)[i][3]; (*state)[i][0] = Multiply(a, 0x0E) ^ Multiply(b, 0x0B) ^ Multiply(c, 0x0D) ^ Multiply(d, 0x09); (*state)[i][1] = Multiply(a, 0x09) ^ Multiply(b, 0x0E) ^ Multiply(c, 0x0B) ^ Multiply(d, 0x0D); (*state)[i][2] = Multiply(a, 0x0D) ^ Multiply(b, 0x09) ^ Multiply(c, 0x0E) ^ Multiply(d, 0x0B); (*state)[i][3] = Multiply(a, 0x0B) ^ Multiply(b, 0x0D) ^ Multiply(c, 0x09) ^ Multiply(d, 0x0E); } } // The SubBytes Function Substitutes the values in the // state matrix with values in an S-box. inline static void inv_sub_bytes(state_t* state) { uint8_t i, j; for (i = 0; i < 4; ++i) for (j = 0; j < 4; ++j) (*state)[j][i] = rsbox[(*state)[j][i]]; } inline static void inv_shift_rows(state_t* state) { uint8_t temp; // Rotate first row 1 columns to right temp = (*state)[3][1]; (*state)[3][1] = (*state)[2][1]; (*state)[2][1] = (*state)[1][1]; (*state)[1][1] = (*state)[0][1]; (*state)[0][1] = temp; // Rotate second row 2 columns to right temp = (*state)[0][2]; (*state)[0][2] = (*state)[2][2]; (*state)[2][2] = temp; temp = (*state)[1][2]; (*state)[1][2] = (*state)[3][2]; (*state)[3][2] = temp; // Rotate third row 3 columns to right temp = (*state)[0][3]; (*state)[0][3] = (*state)[1][3]; (*state)[1][3] = (*state)[2][3]; (*state)[2][3] = (*state)[3][3]; (*state)[3][3] = temp; } // Cipher is the main function that encrypts the PlainText. inline static void cipher_aes128(state_t* state, const uint8_t* RoundKey) { uint8_t round = 0; // Add the First round key to the state before starting the rounds. add_round_key(0, state, RoundKey); // There will be Nr rounds. // The first Nr-1 rounds are identical. // These Nr rounds are executed in the loop below. // Last one without MixColumns() for (round = 1; ; ++round) { sub_bytes(state); shift_rows(state); if (round == Nr128) break; mix_columns(state); add_round_key(round, state, RoundKey); } // Add round key to last round add_round_key(Nr128, state, RoundKey); } inline static void cipher_aes192(state_t* state, const uint8_t* RoundKey) { uint8_t round = 0; // Add the First round key to the state before starting the rounds. add_round_key(0, state, RoundKey); // There will be Nr rounds. // The first Nr-1 rounds are identical. // These Nr rounds are executed in the loop below. // Last one without MixColumns() for (round = 1; ; ++round) { sub_bytes(state); shift_rows(state); if (round == Nr192) break; mix_columns(state); add_round_key(round, state, RoundKey); } // Add round key to last round add_round_key(Nr192, state, RoundKey); } inline static void cipher_aes256(state_t* state, const uint8_t* RoundKey) { uint8_t round = 0; // Add the First round key to the state before starting the rounds. add_round_key(0, state, RoundKey); // There will be Nr rounds. // The first Nr-1 rounds are identical. // These Nr rounds are executed in the loop below. // Last one without MixColumns() for (round = 1; ; ++round) { sub_bytes(state); shift_rows(state); if (round == Nr256) break; mix_columns(state); add_round_key(round, state, RoundKey); } // Add round key to last round add_round_key(Nr256, state, RoundKey); } inline static void cipher_aes128_ni(void* state, __m128i* round_key) { __m128i m = _mm_loadu_si128((__m128i*)state); m = _mm_xor_si128(m, round_key[0]); m = _mm_aesenc_si128(m, round_key[1]); m = _mm_aesenc_si128(m, round_key[2]); m = _mm_aesenc_si128(m, round_key[3]); m = _mm_aesenc_si128(m, round_key[4]); m = _mm_aesenc_si128(m, round_key[5]); m = _mm_aesenc_si128(m, round_key[6]); m = _mm_aesenc_si128(m, round_key[7]); m = _mm_aesenc_si128(m, round_key[8]); m = _mm_aesenc_si128(m, round_key[9]); m = _mm_aesenclast_si128(m, round_key[10]); _mm_storeu_si128((__m128i*)state, m); } inline static void cipher_aes192_ni(void* state, __m128i* round_key) { __m128i m = _mm_loadu_si128((__m128i*)state); m = _mm_xor_si128(m, round_key[0]); m = _mm_aesenc_si128(m, round_key[1]); m = _mm_aesenc_si128(m, round_key[2]); m = _mm_aesenc_si128(m, round_key[3]); m = _mm_aesenc_si128(m, round_key[4]); m = _mm_aesenc_si128(m, round_key[5]); m = _mm_aesenc_si128(m, round_key[6]); m = _mm_aesenc_si128(m, round_key[7]); m = _mm_aesenc_si128(m, round_key[8]); m = _mm_aesenc_si128(m, round_key[9]); m = _mm_aesenc_si128(m, round_key[10]); m = _mm_aesenc_si128(m, round_key[11]); m = _mm_aesenclast_si128(m, round_key[12]); _mm_storeu_si128((__m128i*)state, m); } inline static void cipher_aes256_ni(void* state, __m128i* round_key) { __m128i m = _mm_loadu_si128((__m128i*)state); m = _mm_xor_si128(m, round_key[0]); m = _mm_aesenc_si128(m, round_key[1]); m = _mm_aesenc_si128(m, round_key[2]); m = _mm_aesenc_si128(m, round_key[3]); m = _mm_aesenc_si128(m, round_key[4]); m = _mm_aesenc_si128(m, round_key[5]); m = _mm_aesenc_si128(m, round_key[6]); m = _mm_aesenc_si128(m, round_key[7]); m = _mm_aesenc_si128(m, round_key[8]); m = _mm_aesenc_si128(m, round_key[9]); m = _mm_aesenc_si128(m, round_key[10]); m = _mm_aesenc_si128(m, round_key[11]); m = _mm_aesenc_si128(m, round_key[12]); m = _mm_aesenc_si128(m, round_key[13]); m = _mm_aesenclast_si128(m, round_key[14]); _mm_storeu_si128((__m128i*)state, m); } inline static void inv_cipher_aes128(state_t* state, const uint8_t* RoundKey) { uint8_t round = 0; // Add the First round key to the state before starting the rounds. add_round_key(Nr128, state, RoundKey); // There will be Nr rounds. // The first Nr-1 rounds are identical. // These Nr rounds are executed in the loop below. // Last one without InvMixColumn() for (round = (Nr128 - 1); ; --round) { inv_shift_rows(state); inv_sub_bytes(state); add_round_key(round, state, RoundKey); if (round == 0) break; inv_mix_columns(state); } } inline static void inv_cipher_aes192(state_t* state, const uint8_t* RoundKey) { uint8_t round = 0; // Add the First round key to the state before starting the rounds. add_round_key(Nr192, state, RoundKey); // There will be Nr rounds. // The first Nr-1 rounds are identical. // These Nr rounds are executed in the loop below. // Last one without InvMixColumn() for (round = (Nr192 - 1); ; --round) { inv_shift_rows(state); inv_sub_bytes(state); add_round_key(round, state, RoundKey); if (round == 0) break; inv_mix_columns(state); } } inline static void inv_cipher_aes256(state_t* state, const uint8_t* RoundKey) { uint8_t round = 0; // Add the First round key to the state before starting the rounds. add_round_key(Nr256, state, RoundKey); // There will be Nr rounds. // The first Nr-1 rounds are identical. // These Nr rounds are executed in the loop below. // Last one without InvMixColumn() for (round = (Nr256 - 1); ; --round) { inv_shift_rows(state); inv_sub_bytes(state); add_round_key(round, state, RoundKey); if (round == 0) break; inv_mix_columns(state); } } inline static void inv_cipher_aes128_ni(void* state, __m128i* round_key) { __m128i m = _mm_loadu_si128((__m128i*)state); m = _mm_xor_si128(m, round_key[10]); m = _mm_aesdec_si128(m, round_key[11]); m = _mm_aesdec_si128(m, round_key[12]); m = _mm_aesdec_si128(m, round_key[13]); m = _mm_aesdec_si128(m, round_key[14]); m = _mm_aesdec_si128(m, round_key[15]); m = _mm_aesdec_si128(m, round_key[16]); m = _mm_aesdec_si128(m, round_key[17]); m = _mm_aesdec_si128(m, round_key[18]); m = _mm_aesdec_si128(m, round_key[19]); m = _mm_aesdeclast_si128(m, round_key[0]); _mm_storeu_si128((__m128i*)state, m); } inline static void inv_cipher_aes192_ni(void* state, __m128i* round_key) { __m128i m = _mm_loadu_si128((__m128i*)state); m = _mm_xor_si128(m, round_key[12]); m = _mm_aesdec_si128(m, round_key[13]); m = _mm_aesdec_si128(m, round_key[14]); m = _mm_aesdec_si128(m, round_key[15]); m = _mm_aesdec_si128(m, round_key[16]); m = _mm_aesdec_si128(m, round_key[17]); m = _mm_aesdec_si128(m, round_key[18]); m = _mm_aesdec_si128(m, round_key[19]); m = _mm_aesdec_si128(m, round_key[20]); m = _mm_aesdec_si128(m, round_key[21]); m = _mm_aesdec_si128(m, round_key[22]); m = _mm_aesdec_si128(m, round_key[23]); m = _mm_aesdeclast_si128(m, round_key[0]); _mm_storeu_si128((__m128i*)state, m); } inline static void inv_cipher_aes256_ni(void* state, __m128i* round_key) { __m128i m = _mm_loadu_si128((__m128i*)state); m = _mm_xor_si128(m, round_key[14]); m = _mm_aesdec_si128(m, round_key[15]); m = _mm_aesdec_si128(m, round_key[16]); m = _mm_aesdec_si128(m, round_key[17]); m = _mm_aesdec_si128(m, round_key[18]); m = _mm_aesdec_si128(m, round_key[19]); m = _mm_aesdec_si128(m, round_key[20]); m = _mm_aesdec_si128(m, round_key[21]); m = _mm_aesdec_si128(m, round_key[22]); m = _mm_aesdec_si128(m, round_key[23]); m = _mm_aesdec_si128(m, round_key[24]); m = _mm_aesdec_si128(m, round_key[25]); m = _mm_aesdec_si128(m, round_key[26]); m = _mm_aesdec_si128(m, round_key[27]); m = _mm_aesdeclast_si128(m, round_key[0]); _mm_storeu_si128((__m128i*)state, m); } /*****************************************************************************/ /* Public functions: */ /*****************************************************************************/ void aes128_ecb_encrypt(aes128_ctx* ctx, uint8_t* buf) { // The next function call encrypts the PlainText with the Key using AES algorithm. if (aes_ni) cipher_aes128_ni(buf, ctx->RoundKeyNI); else cipher_aes128((state_t*)buf, ctx->RoundKey); } void aes192_ecb_encrypt(aes192_ctx* ctx, uint8_t* buf) { // The next function call encrypts the PlainText with the Key using AES algorithm. if (aes_ni) cipher_aes192_ni(buf, ctx->RoundKeyNI); else cipher_aes192((state_t*)buf, ctx->RoundKey); } void aes256_ecb_encrypt(aes256_ctx* ctx, uint8_t* buf) { // The next function call encrypts the PlainText with the Key using AES algorithm. if (aes_ni) cipher_aes256_ni(buf, ctx->RoundKeyNI); else cipher_aes256((state_t*)buf, ctx->RoundKey); } void aes128_ecb_decrypt(aes128_ctx* ctx, uint8_t* buf) { // The next function call decrypts the PlainText with the Key using AES algorithm. if (aes_ni) inv_cipher_aes128_ni(buf, ctx->RoundKeyNI); else inv_cipher_aes128((state_t*)buf, ctx->RoundKey); } void aes192_ecb_decrypt(aes192_ctx* ctx, uint8_t* buf) { // The next function call decrypts the PlainText with the Key using AES algorithm. if (aes_ni) inv_cipher_aes192_ni(buf, ctx->RoundKeyNI); else inv_cipher_aes192((state_t*)buf, ctx->RoundKey); } void aes256_ecb_decrypt(aes256_ctx* ctx, uint8_t* buf) { // The next function call decrypts the PlainText with the Key using AES algorithm. if (aes_ni) inv_cipher_aes256_ni(buf, ctx->RoundKeyNI); else inv_cipher_aes256((state_t*)buf, ctx->RoundKey); } void aes128_ecb_encrypt_buffer(aes128_ctx* ctx, uint8_t* buf, size_t length) { if (aes_ni) for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) cipher_aes128_ni(buf, ctx->RoundKeyNI); else for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) cipher_aes128((state_t*)buf, ctx->RoundKey); } void aes192_ecb_encrypt_buffer(aes192_ctx* ctx, uint8_t* buf, size_t length) { if (aes_ni) for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) cipher_aes192_ni(buf, ctx->RoundKeyNI); else for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) cipher_aes192((state_t*)buf, ctx->RoundKey); } void aes256_ecb_encrypt_buffer(aes256_ctx* ctx, uint8_t* buf, size_t length) { if (aes_ni) for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) cipher_aes256_ni(buf, ctx->RoundKeyNI); else for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) cipher_aes256((state_t*)buf, ctx->RoundKey); } void aes128_ecb_decrypt_buffer(aes128_ctx* ctx, uint8_t* buf, size_t length) { if (aes_ni) for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) inv_cipher_aes128_ni(buf, ctx->RoundKeyNI); else for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) inv_cipher_aes128((state_t*)buf, ctx->RoundKey); } void aes192_ecb_decrypt_buffer(aes192_ctx* ctx, uint8_t* buf, size_t length) { if (aes_ni) for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) inv_cipher_aes192_ni(buf, ctx->RoundKeyNI); else for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) inv_cipher_aes192((state_t*)buf, ctx->RoundKey); } void aes256_ecb_decrypt_buffer(aes256_ctx* ctx, uint8_t* buf, size_t length) { if (aes_ni) for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) inv_cipher_aes256_ni(buf, ctx->RoundKeyNI); else for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) inv_cipher_aes256((state_t*)buf, ctx->RoundKey); } inline static void XorWithIv(uint8_t* buf, const uint8_t* Iv) { _mm_storeu_si128((__m128i*)buf, _mm_xor_si128( _mm_loadu_si128((const __m128i*)buf), _mm_loadu_si128((const __m128i*)Iv) ) ); } void aes128_cbc_encrypt(aes128_ctx* ctx, uint8_t buf[AES_BLOCKLEN]) { uint8_t* Iv = ctx->Iv; if (aes_ni) { XorWithIv(buf, Iv); cipher_aes128_ni(buf, ctx->RoundKeyNI); Iv = buf; } else { XorWithIv(buf, Iv); cipher_aes128((state_t*)buf, ctx->RoundKey); Iv = buf; } /* store Iv in ctx for next call */ memcpy(ctx->Iv, Iv, AES_BLOCKLEN); } void aes192_cbc_encrypt(aes192_ctx* ctx, uint8_t buf[AES_BLOCKLEN]) { uint8_t* Iv = ctx->Iv; if (aes_ni) { XorWithIv(buf, Iv); cipher_aes192_ni(buf, ctx->RoundKeyNI); Iv = buf; } else { XorWithIv(buf, Iv); cipher_aes192((state_t*)buf, ctx->RoundKey); Iv = buf; } /* store Iv in ctx for next call */ memcpy(ctx->Iv, Iv, AES_BLOCKLEN); } void aes256_cbc_encrypt(aes256_ctx* ctx, uint8_t buf[AES_BLOCKLEN]) { uint8_t* Iv = ctx->Iv; if (aes_ni) { XorWithIv(buf, Iv); cipher_aes256_ni(buf, ctx->RoundKeyNI); Iv = buf; } else { XorWithIv(buf, Iv); cipher_aes256((state_t*)buf, ctx->RoundKey); Iv = buf; } /* store Iv in ctx for next call */ memcpy(ctx->Iv, Iv, AES_BLOCKLEN); } void aes128_cbc_decrypt(aes128_ctx* ctx, uint8_t buf[AES_BLOCKLEN]) { uint8_t storeNextIv[AES_BLOCKLEN]; if (aes_ni) { memcpy(storeNextIv, buf, AES_BLOCKLEN); inv_cipher_aes128_ni(buf, ctx->RoundKeyNI); XorWithIv(buf, ctx->Iv); memcpy(ctx->Iv, storeNextIv, AES_BLOCKLEN); } else { memcpy(storeNextIv, buf, AES_BLOCKLEN); inv_cipher_aes128((state_t*)buf, ctx->RoundKey); XorWithIv(buf, ctx->Iv); memcpy(ctx->Iv, storeNextIv, AES_BLOCKLEN); } } void aes192_cbc_decrypt(aes192_ctx* ctx, uint8_t buf[AES_BLOCKLEN]) { uint8_t storeNextIv[AES_BLOCKLEN]; if (aes_ni) { memcpy(storeNextIv, buf, AES_BLOCKLEN); inv_cipher_aes192_ni(buf, ctx->RoundKeyNI); XorWithIv(buf, ctx->Iv); memcpy(ctx->Iv, storeNextIv, AES_BLOCKLEN); } else { memcpy(storeNextIv, buf, AES_BLOCKLEN); inv_cipher_aes192((state_t*)buf, ctx->RoundKey); XorWithIv(buf, ctx->Iv); memcpy(ctx->Iv, storeNextIv, AES_BLOCKLEN); } } void aes256_cbc_decrypt(aes256_ctx* ctx, uint8_t buf[AES_BLOCKLEN]) { uint8_t storeNextIv[AES_BLOCKLEN]; if (aes_ni) { memcpy(storeNextIv, buf, AES_BLOCKLEN); inv_cipher_aes256_ni(buf, ctx->RoundKeyNI); XorWithIv(buf, ctx->Iv); memcpy(ctx->Iv, storeNextIv, AES_BLOCKLEN); } else { memcpy(storeNextIv, buf, AES_BLOCKLEN); inv_cipher_aes256((state_t*)buf, ctx->RoundKey); XorWithIv(buf, ctx->Iv); memcpy(ctx->Iv, storeNextIv, AES_BLOCKLEN); } } void aes128_cbc_encrypt_buffer(aes128_ctx *ctx, uint8_t* buf, size_t length) { uint8_t* Iv = ctx->Iv; if (aes_ni) for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) { XorWithIv(buf, Iv); cipher_aes128_ni(buf, ctx->RoundKeyNI); Iv = buf; } else for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) { XorWithIv(buf, Iv); cipher_aes128((state_t*)buf, ctx->RoundKey); Iv = buf; } /* store Iv in ctx for next call */ memcpy(ctx->Iv, Iv, AES_BLOCKLEN); } void aes192_cbc_encrypt_buffer(aes192_ctx *ctx, uint8_t* buf, size_t length) { uint8_t* Iv = ctx->Iv; if (aes_ni) for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) { XorWithIv(buf, Iv); cipher_aes192_ni(buf, ctx->RoundKeyNI); Iv = buf; } else for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) { XorWithIv(buf, Iv); cipher_aes192((state_t*)buf, ctx->RoundKey); Iv = buf; } /* store Iv in ctx for next call */ memcpy(ctx->Iv, Iv, AES_BLOCKLEN); } void aes256_cbc_encrypt_buffer(aes256_ctx *ctx, uint8_t* buf, size_t length) { uint8_t* Iv = ctx->Iv; if (aes_ni) for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) { XorWithIv(buf, Iv); cipher_aes256_ni(buf, ctx->RoundKeyNI); Iv = buf; } else for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) { XorWithIv(buf, Iv); cipher_aes256((state_t*)buf, ctx->RoundKey); Iv = buf; } /* store Iv in ctx for next call */ memcpy(ctx->Iv, Iv, AES_BLOCKLEN); } void aes128_cbc_decrypt_buffer(aes128_ctx* ctx, uint8_t* buf, size_t length) { uint8_t storeNextIv[AES_BLOCKLEN]; if (aes_ni) for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) { memcpy(storeNextIv, buf, AES_BLOCKLEN); inv_cipher_aes128_ni(buf, ctx->RoundKeyNI); XorWithIv(buf, ctx->Iv); memcpy(ctx->Iv, storeNextIv, AES_BLOCKLEN); } else for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) { memcpy(storeNextIv, buf, AES_BLOCKLEN); inv_cipher_aes128((state_t*)buf, ctx->RoundKey); XorWithIv(buf, ctx->Iv); memcpy(ctx->Iv, storeNextIv, AES_BLOCKLEN); } } void aes192_cbc_decrypt_buffer(aes192_ctx* ctx, uint8_t* buf, size_t length) { uint8_t storeNextIv[AES_BLOCKLEN]; if (aes_ni) for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) { memcpy(storeNextIv, buf, AES_BLOCKLEN); inv_cipher_aes192_ni(buf, ctx->RoundKeyNI); XorWithIv(buf, ctx->Iv); memcpy(ctx->Iv, storeNextIv, AES_BLOCKLEN); } else for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) { memcpy(storeNextIv, buf, AES_BLOCKLEN); inv_cipher_aes192((state_t*)buf, ctx->RoundKey); XorWithIv(buf, ctx->Iv); memcpy(ctx->Iv, storeNextIv, AES_BLOCKLEN); } } void aes256_cbc_decrypt_buffer(aes256_ctx* ctx, uint8_t* buf, size_t length) { uint8_t storeNextIv[AES_BLOCKLEN]; if (aes_ni) for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) { memcpy(storeNextIv, buf, AES_BLOCKLEN); inv_cipher_aes256_ni(buf, ctx->RoundKeyNI); XorWithIv(buf, ctx->Iv); memcpy(ctx->Iv, storeNextIv, AES_BLOCKLEN); } else for (size_t i = 0; i < length; i += AES_BLOCKLEN, buf += AES_BLOCKLEN) { memcpy(storeNextIv, buf, AES_BLOCKLEN); inv_cipher_aes256((state_t*)buf, ctx->RoundKey); XorWithIv(buf, ctx->Iv); memcpy(ctx->Iv, storeNextIv, AES_BLOCKLEN); } } /* Symmetrical operation: same function for encrypting as for decrypting. Note any IV/nonce should never be reused with the same key */ void aes128_ctr_xcrypt_buffer(aes128_ctx* ctx, uint8_t* buf, uint32_t length) { uint8_t buffer[AES_BLOCKLEN]; int32_t bi; size_t i; for (i = 0, bi = AES_BLOCKLEN; i < length; i++, bi++) { if (bi == AES_BLOCKLEN) { /* we need to regen xor compliment in buffer */ memcpy(buffer, ctx->Iv, AES_BLOCKLEN); if (aes_ni) cipher_aes128_ni(buffer, ctx->RoundKeyNI); else cipher_aes128((state_t*)buffer, ctx->RoundKey); /* Increment Iv and handle overflow */ for (bi = (AES_BLOCKLEN - 1); bi >= 0; bi--) { /* inc will overflow */ if (ctx->Iv[bi] == 255) { ctx->Iv[bi] = 0; continue; } ctx->Iv[bi]++; break; } bi = 0; } buf[i] ^= buffer[bi]; } } void aes192_ctr_xcrypt_buffer(aes192_ctx* ctx, uint8_t* buf, uint32_t length) { uint8_t buffer[AES_BLOCKLEN]; int32_t bi; size_t i; for (i = 0, bi = AES_BLOCKLEN; i < length; i++, bi++) { if (bi == AES_BLOCKLEN) { /* we need to regen xor compliment in buffer */ memcpy(buffer, ctx->Iv, AES_BLOCKLEN); if (aes_ni) cipher_aes192_ni(buffer, ctx->RoundKeyNI); else cipher_aes192((state_t*)buffer, ctx->RoundKey); /* Increment Iv and handle overflow */ for (bi = (AES_BLOCKLEN - 1); bi >= 0; bi--) { /* inc will overflow */ if (ctx->Iv[bi] == 255) { ctx->Iv[bi] = 0; continue; } ctx->Iv[bi]++; break; } bi = 0; } buf[i] ^= buffer[bi]; } } void aes256_ctr_xcrypt_buffer(aes256_ctx* ctx, uint8_t* buf, uint32_t length) { uint8_t buffer[AES_BLOCKLEN]; int32_t bi; size_t i; for (i = 0, bi = AES_BLOCKLEN; i < length; i++, bi++) { if (bi == AES_BLOCKLEN) { /* we need to regen xor compliment in buffer */ memcpy(buffer, ctx->Iv, AES_BLOCKLEN); if (aes_ni) cipher_aes256_ni(buffer, ctx->RoundKeyNI); else cipher_aes256((state_t*)buffer, ctx->RoundKey); /* Increment Iv and handle overflow */ for (bi = (AES_BLOCKLEN - 1); bi >= 0; bi--) { /* inc will overflow */ if (ctx->Iv[bi] == 255) { ctx->Iv[bi] = 0; continue; } ctx->Iv[bi]++; break; } bi = 0; } buf[i] ^= buffer[bi]; } }