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korenkonder_ReDIVA/src/KKdLib/aes.cpp
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/*
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];
}
}
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