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kupyna.c
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/*
Reference implementation of the Kupyna hash function (DSTU 7564:2014), all hash code length variants
Authors: Ruslan Kiianchuk, Ruslan Mordvinov, Roman Oliynykov
*/
#include <memory.h>
#include <stdio.h>
#include "kupyna.h"
uint8_t mds_matrix[8][8] = {
{0x01, 0x01, 0x05, 0x01, 0x08, 0x06, 0x07, 0x04},
{0x04, 0x01, 0x01, 0x05, 0x01, 0x08, 0x06, 0x07},
{0x07, 0x04, 0x01, 0x01, 0x05, 0x01, 0x08, 0x06},
{0x06, 0x07, 0x04, 0x01, 0x01, 0x05, 0x01, 0x08},
{0x08, 0x06, 0x07, 0x04, 0x01, 0x01, 0x05, 0x01},
{0x01, 0x08, 0x06, 0x07, 0x04, 0x01, 0x01, 0x05},
{0x05, 0x01, 0x08, 0x06, 0x07, 0x04, 0x01, 0x01},
{0x01, 0x05, 0x01, 0x08, 0x06, 0x07, 0x04, 0x01}
};
uint8_t sboxes[4][256] = {
{
0xa8, 0x43, 0x5f, 0x06, 0x6b, 0x75, 0x6c, 0x59, 0x71, 0xdf, 0x87, 0x95, 0x17, 0xf0, 0xd8, 0x09,
0x6d, 0xf3, 0x1d, 0xcb, 0xc9, 0x4d, 0x2c, 0xaf, 0x79, 0xe0, 0x97, 0xfd, 0x6f, 0x4b, 0x45, 0x39,
0x3e, 0xdd, 0xa3, 0x4f, 0xb4, 0xb6, 0x9a, 0x0e, 0x1f, 0xbf, 0x15, 0xe1, 0x49, 0xd2, 0x93, 0xc6,
0x92, 0x72, 0x9e, 0x61, 0xd1, 0x63, 0xfa, 0xee, 0xf4, 0x19, 0xd5, 0xad, 0x58, 0xa4, 0xbb, 0xa1,
0xdc, 0xf2, 0x83, 0x37, 0x42, 0xe4, 0x7a, 0x32, 0x9c, 0xcc, 0xab, 0x4a, 0x8f, 0x6e, 0x04, 0x27,
0x2e, 0xe7, 0xe2, 0x5a, 0x96, 0x16, 0x23, 0x2b, 0xc2, 0x65, 0x66, 0x0f, 0xbc, 0xa9, 0x47, 0x41,
0x34, 0x48, 0xfc, 0xb7, 0x6a, 0x88, 0xa5, 0x53, 0x86, 0xf9, 0x5b, 0xdb, 0x38, 0x7b, 0xc3, 0x1e,
0x22, 0x33, 0x24, 0x28, 0x36, 0xc7, 0xb2, 0x3b, 0x8e, 0x77, 0xba, 0xf5, 0x14, 0x9f, 0x08, 0x55,
0x9b, 0x4c, 0xfe, 0x60, 0x5c, 0xda, 0x18, 0x46, 0xcd, 0x7d, 0x21, 0xb0, 0x3f, 0x1b, 0x89, 0xff,
0xeb, 0x84, 0x69, 0x3a, 0x9d, 0xd7, 0xd3, 0x70, 0x67, 0x40, 0xb5, 0xde, 0x5d, 0x30, 0x91, 0xb1,
0x78, 0x11, 0x01, 0xe5, 0x00, 0x68, 0x98, 0xa0, 0xc5, 0x02, 0xa6, 0x74, 0x2d, 0x0b, 0xa2, 0x76,
0xb3, 0xbe, 0xce, 0xbd, 0xae, 0xe9, 0x8a, 0x31, 0x1c, 0xec, 0xf1, 0x99, 0x94, 0xaa, 0xf6, 0x26,
0x2f, 0xef, 0xe8, 0x8c, 0x35, 0x03, 0xd4, 0x7f, 0xfb, 0x05, 0xc1, 0x5e, 0x90, 0x20, 0x3d, 0x82,
0xf7, 0xea, 0x0a, 0x0d, 0x7e, 0xf8, 0x50, 0x1a, 0xc4, 0x07, 0x57, 0xb8, 0x3c, 0x62, 0xe3, 0xc8,
0xac, 0x52, 0x64, 0x10, 0xd0, 0xd9, 0x13, 0x0c, 0x12, 0x29, 0x51, 0xb9, 0xcf, 0xd6, 0x73, 0x8d,
0x81, 0x54, 0xc0, 0xed, 0x4e, 0x44, 0xa7, 0x2a, 0x85, 0x25, 0xe6, 0xca, 0x7c, 0x8b, 0x56, 0x80
},
{
0xce, 0xbb, 0xeb, 0x92, 0xea, 0xcb, 0x13, 0xc1, 0xe9, 0x3a, 0xd6, 0xb2, 0xd2, 0x90, 0x17, 0xf8,
0x42, 0x15, 0x56, 0xb4, 0x65, 0x1c, 0x88, 0x43, 0xc5, 0x5c, 0x36, 0xba, 0xf5, 0x57, 0x67, 0x8d,
0x31, 0xf6, 0x64, 0x58, 0x9e, 0xf4, 0x22, 0xaa, 0x75, 0x0f, 0x02, 0xb1, 0xdf, 0x6d, 0x73, 0x4d,
0x7c, 0x26, 0x2e, 0xf7, 0x08, 0x5d, 0x44, 0x3e, 0x9f, 0x14, 0xc8, 0xae, 0x54, 0x10, 0xd8, 0xbc,
0x1a, 0x6b, 0x69, 0xf3, 0xbd, 0x33, 0xab, 0xfa, 0xd1, 0x9b, 0x68, 0x4e, 0x16, 0x95, 0x91, 0xee,
0x4c, 0x63, 0x8e, 0x5b, 0xcc, 0x3c, 0x19, 0xa1, 0x81, 0x49, 0x7b, 0xd9, 0x6f, 0x37, 0x60, 0xca,
0xe7, 0x2b, 0x48, 0xfd, 0x96, 0x45, 0xfc, 0x41, 0x12, 0x0d, 0x79, 0xe5, 0x89, 0x8c, 0xe3, 0x20,
0x30, 0xdc, 0xb7, 0x6c, 0x4a, 0xb5, 0x3f, 0x97, 0xd4, 0x62, 0x2d, 0x06, 0xa4, 0xa5, 0x83, 0x5f,
0x2a, 0xda, 0xc9, 0x00, 0x7e, 0xa2, 0x55, 0xbf, 0x11, 0xd5, 0x9c, 0xcf, 0x0e, 0x0a, 0x3d, 0x51,
0x7d, 0x93, 0x1b, 0xfe, 0xc4, 0x47, 0x09, 0x86, 0x0b, 0x8f, 0x9d, 0x6a, 0x07, 0xb9, 0xb0, 0x98,
0x18, 0x32, 0x71, 0x4b, 0xef, 0x3b, 0x70, 0xa0, 0xe4, 0x40, 0xff, 0xc3, 0xa9, 0xe6, 0x78, 0xf9,
0x8b, 0x46, 0x80, 0x1e, 0x38, 0xe1, 0xb8, 0xa8, 0xe0, 0x0c, 0x23, 0x76, 0x1d, 0x25, 0x24, 0x05,
0xf1, 0x6e, 0x94, 0x28, 0x9a, 0x84, 0xe8, 0xa3, 0x4f, 0x77, 0xd3, 0x85, 0xe2, 0x52, 0xf2, 0x82,
0x50, 0x7a, 0x2f, 0x74, 0x53, 0xb3, 0x61, 0xaf, 0x39, 0x35, 0xde, 0xcd, 0x1f, 0x99, 0xac, 0xad,
0x72, 0x2c, 0xdd, 0xd0, 0x87, 0xbe, 0x5e, 0xa6, 0xec, 0x04, 0xc6, 0x03, 0x34, 0xfb, 0xdb, 0x59,
0xb6, 0xc2, 0x01, 0xf0, 0x5a, 0xed, 0xa7, 0x66, 0x21, 0x7f, 0x8a, 0x27, 0xc7, 0xc0, 0x29, 0xd7
},
{
0x93, 0xd9, 0x9a, 0xb5, 0x98, 0x22, 0x45, 0xfc, 0xba, 0x6a, 0xdf, 0x02, 0x9f, 0xdc, 0x51, 0x59,
0x4a, 0x17, 0x2b, 0xc2, 0x94, 0xf4, 0xbb, 0xa3, 0x62, 0xe4, 0x71, 0xd4, 0xcd, 0x70, 0x16, 0xe1,
0x49, 0x3c, 0xc0, 0xd8, 0x5c, 0x9b, 0xad, 0x85, 0x53, 0xa1, 0x7a, 0xc8, 0x2d, 0xe0, 0xd1, 0x72,
0xa6, 0x2c, 0xc4, 0xe3, 0x76, 0x78, 0xb7, 0xb4, 0x09, 0x3b, 0x0e, 0x41, 0x4c, 0xde, 0xb2, 0x90,
0x25, 0xa5, 0xd7, 0x03, 0x11, 0x00, 0xc3, 0x2e, 0x92, 0xef, 0x4e, 0x12, 0x9d, 0x7d, 0xcb, 0x35,
0x10, 0xd5, 0x4f, 0x9e, 0x4d, 0xa9, 0x55, 0xc6, 0xd0, 0x7b, 0x18, 0x97, 0xd3, 0x36, 0xe6, 0x48,
0x56, 0x81, 0x8f, 0x77, 0xcc, 0x9c, 0xb9, 0xe2, 0xac, 0xb8, 0x2f, 0x15, 0xa4, 0x7c, 0xda, 0x38,
0x1e, 0x0b, 0x05, 0xd6, 0x14, 0x6e, 0x6c, 0x7e, 0x66, 0xfd, 0xb1, 0xe5, 0x60, 0xaf, 0x5e, 0x33,
0x87, 0xc9, 0xf0, 0x5d, 0x6d, 0x3f, 0x88, 0x8d, 0xc7, 0xf7, 0x1d, 0xe9, 0xec, 0xed, 0x80, 0x29,
0x27, 0xcf, 0x99, 0xa8, 0x50, 0x0f, 0x37, 0x24, 0x28, 0x30, 0x95, 0xd2, 0x3e, 0x5b, 0x40, 0x83,
0xb3, 0x69, 0x57, 0x1f, 0x07, 0x1c, 0x8a, 0xbc, 0x20, 0xeb, 0xce, 0x8e, 0xab, 0xee, 0x31, 0xa2,
0x73, 0xf9, 0xca, 0x3a, 0x1a, 0xfb, 0x0d, 0xc1, 0xfe, 0xfa, 0xf2, 0x6f, 0xbd, 0x96, 0xdd, 0x43,
0x52, 0xb6, 0x08, 0xf3, 0xae, 0xbe, 0x19, 0x89, 0x32, 0x26, 0xb0, 0xea, 0x4b, 0x64, 0x84, 0x82,
0x6b, 0xf5, 0x79, 0xbf, 0x01, 0x5f, 0x75, 0x63, 0x1b, 0x23, 0x3d, 0x68, 0x2a, 0x65, 0xe8, 0x91,
0xf6, 0xff, 0x13, 0x58, 0xf1, 0x47, 0x0a, 0x7f, 0xc5, 0xa7, 0xe7, 0x61, 0x5a, 0x06, 0x46, 0x44,
0x42, 0x04, 0xa0, 0xdb, 0x39, 0x86, 0x54, 0xaa, 0x8c, 0x34, 0x21, 0x8b, 0xf8, 0x0c, 0x74, 0x67
},
{
0x68, 0x8d, 0xca, 0x4d, 0x73, 0x4b, 0x4e, 0x2a, 0xd4, 0x52, 0x26, 0xb3, 0x54, 0x1e, 0x19, 0x1f,
0x22, 0x03, 0x46, 0x3d, 0x2d, 0x4a, 0x53, 0x83, 0x13, 0x8a, 0xb7, 0xd5, 0x25, 0x79, 0xf5, 0xbd,
0x58, 0x2f, 0x0d, 0x02, 0xed, 0x51, 0x9e, 0x11, 0xf2, 0x3e, 0x55, 0x5e, 0xd1, 0x16, 0x3c, 0x66,
0x70, 0x5d, 0xf3, 0x45, 0x40, 0xcc, 0xe8, 0x94, 0x56, 0x08, 0xce, 0x1a, 0x3a, 0xd2, 0xe1, 0xdf,
0xb5, 0x38, 0x6e, 0x0e, 0xe5, 0xf4, 0xf9, 0x86, 0xe9, 0x4f, 0xd6, 0x85, 0x23, 0xcf, 0x32, 0x99,
0x31, 0x14, 0xae, 0xee, 0xc8, 0x48, 0xd3, 0x30, 0xa1, 0x92, 0x41, 0xb1, 0x18, 0xc4, 0x2c, 0x71,
0x72, 0x44, 0x15, 0xfd, 0x37, 0xbe, 0x5f, 0xaa, 0x9b, 0x88, 0xd8, 0xab, 0x89, 0x9c, 0xfa, 0x60,
0xea, 0xbc, 0x62, 0x0c, 0x24, 0xa6, 0xa8, 0xec, 0x67, 0x20, 0xdb, 0x7c, 0x28, 0xdd, 0xac, 0x5b,
0x34, 0x7e, 0x10, 0xf1, 0x7b, 0x8f, 0x63, 0xa0, 0x05, 0x9a, 0x43, 0x77, 0x21, 0xbf, 0x27, 0x09,
0xc3, 0x9f, 0xb6, 0xd7, 0x29, 0xc2, 0xeb, 0xc0, 0xa4, 0x8b, 0x8c, 0x1d, 0xfb, 0xff, 0xc1, 0xb2,
0x97, 0x2e, 0xf8, 0x65, 0xf6, 0x75, 0x07, 0x04, 0x49, 0x33, 0xe4, 0xd9, 0xb9, 0xd0, 0x42, 0xc7,
0x6c, 0x90, 0x00, 0x8e, 0x6f, 0x50, 0x01, 0xc5, 0xda, 0x47, 0x3f, 0xcd, 0x69, 0xa2, 0xe2, 0x7a,
0xa7, 0xc6, 0x93, 0x0f, 0x0a, 0x06, 0xe6, 0x2b, 0x96, 0xa3, 0x1c, 0xaf, 0x6a, 0x12, 0x84, 0x39,
0xe7, 0xb0, 0x82, 0xf7, 0xfe, 0x9d, 0x87, 0x5c, 0x81, 0x35, 0xde, 0xb4, 0xa5, 0xfc, 0x80, 0xef,
0xcb, 0xbb, 0x6b, 0x76, 0xba, 0x5a, 0x7d, 0x78, 0x0b, 0x95, 0xe3, 0xad, 0x74, 0x98, 0x3b, 0x36,
0x64, 0x6d, 0xdc, 0xf0, 0x59, 0xa9, 0x4c, 0x17, 0x7f, 0x91, 0xb8, 0xc9, 0x57, 0x1b, 0xe0, 0x61
}
};
int KupynaInit(size_t hash_nbits, kupyna_t* ctx) {
if ((hash_nbits % 8 != 0) || (hash_nbits > 512)) {
return -1;
}
if (hash_nbits <= 256) {
ctx->rounds = NR_512;
ctx->columns = NB_512;
ctx->nbytes = STATE_BYTE_SIZE_512;
} else {
ctx->rounds = NR_1024;
ctx->columns = NB_1024;
ctx->nbytes = STATE_BYTE_SIZE_1024;
}
ctx->hash_nbits = hash_nbits;
memset(ctx->state, 0, ctx->nbytes);
// Set init value according to the specification.
ctx->state[0][0] = ctx->nbytes;
return 0;
}
void SubBytes(uint8_t state[NB_1024][ROWS], int columns) {
int i, j;
uint8_t temp[NB_1024];
for (i = 0; i < ROWS; ++i) {
for (j = 0; j < columns; ++j) {
state[j][i] = sboxes[i % 4][state[j][i]];
}
}
}
void ShiftBytes(uint8_t state[NB_1024][ROWS], int columns) {
int i, j;
uint8_t temp[NB_1024];
int shift = -1;
for (i = 0; i < ROWS; ++i) {
if ((i == ROWS - 1) && (columns == NB_1024)) {
shift = 11;
} else {
++shift;
}
for (j = 0; j < columns; ++j) {
temp[(j + shift) % columns] = state[j][i];
}
for (j = 0; j < columns; ++j) {
state[j][i] = temp[j];
}
}
}
uint8_t MultiplyGF(uint8_t x, uint8_t y) {
int i;
uint8_t r = 0;
uint8_t hbit = 0;
for (i = 0; i < BITS_IN_BYTE; ++i) {
if ((y & 0x1) == 1)
r ^= x;
hbit = x & 0x80;
x <<= 1;
if (hbit == 0x80)
x ^= REDUCTION_POLYNOMIAL;
y >>= 1;
}
return r;
}
void MixColumns(uint8_t state[NB_1024][ROWS], int columns) {
int i, row, col, b;
uint8_t product;
uint8_t result[ROWS];
for (col = 0; col < columns; ++col) {
memset(result, ROWS, 0);
for (row = ROWS - 1; row >= 0; --row) {
product = 0;
for (b = ROWS - 1; b >= 0; --b) {
product ^= MultiplyGF(state[col][b], mds_matrix[row][b]);
}
result[row] = product;
}
for (i = 0; i < ROWS; ++i) {
state[col][i] = result[i];
}
}
}
void AddRoundConstantP(uint8_t state[NB_1024][ROWS], int columns, int round) {
int i;
for (i = 0; i < columns; ++i) {
state[i][0] ^= (i * 0x10) ^ round;
}
}
void AddRoundConstantQ(uint8_t state[NB_1024][ROWS], int columns, int round) {
int j;
uint64_t* s = (uint64_t*)state;
for (j = 0; j < columns; ++j) {
s[j] = s[j] + (0x00F0F0F0F0F0F0F3ULL ^
((((columns - j - 1) * 0x10ULL) ^ round) << (7 * 8)));
}
}
void P(kupyna_t* ctx, uint8_t state[NB_1024][ROWS]) {
int i;
for (i = 0; i < ctx->rounds; ++i) {
AddRoundConstantP(state, ctx->columns, i);
SubBytes(state, ctx->columns);
ShiftBytes(state, ctx->columns);
MixColumns(state, ctx->columns);
}
}
void Q(kupyna_t* ctx, uint8_t state[NB_1024][ROWS]) {
int i;
for (i = 0; i < ctx->rounds; ++i) {
AddRoundConstantQ(state, ctx->columns, i);
SubBytes(state, ctx->columns);
ShiftBytes(state, ctx->columns);
MixColumns(state, ctx->columns);
}
}
int Pad(kupyna_t* ctx, uint8_t* data, size_t msg_nbits) {
int i;
int mask;
int pad_bit;
int extra_bits;
int zero_nbytes;
size_t msg_nbytes = msg_nbits / BITS_IN_BYTE;
size_t nblocks = msg_nbytes / ctx->nbytes;
ctx->pad_nbytes = msg_nbytes - (nblocks * ctx->nbytes);
ctx->data_nbytes = msg_nbytes - ctx->pad_nbytes;
uint8_t* pad_start = data + ctx->data_nbytes;
extra_bits = msg_nbits % BITS_IN_BYTE;
if (extra_bits) {
ctx->pad_nbytes += 1;
}
memcpy(ctx->padding, pad_start, ctx->pad_nbytes);
extra_bits = msg_nbits % BITS_IN_BYTE;
if (extra_bits) {
mask = ~(0xFF >> (extra_bits));
pad_bit = 1 << (7 - extra_bits);
ctx->padding[ctx->pad_nbytes - 1] = (ctx->padding[ctx->pad_nbytes - 1] & mask) | pad_bit;
} else {
ctx->padding[ctx->pad_nbytes] = 0x80;
ctx->pad_nbytes += 1;
}
zero_nbytes = ((-msg_nbits - 97) % (ctx->nbytes * BITS_IN_BYTE)) / BITS_IN_BYTE;
memset(ctx->padding + ctx->pad_nbytes, 0, zero_nbytes);
ctx->pad_nbytes += zero_nbytes;
for (i = 0; i < (96 / 8); ++i, ++ctx->pad_nbytes) {
if (i < sizeof(size_t)) {
ctx->padding[ctx->pad_nbytes] = (msg_nbits >> (i * 8)) & 0xFF;
} else {
ctx->padding[ctx->pad_nbytes] = 0;
}
}
return 0;
}
void Digest(kupyna_t* ctx, uint8_t* data) {
int b, i, j;
uint8_t temp1[NB_1024][ROWS];
uint8_t temp2[NB_1024][ROWS];
for (b = 0; b < ctx->data_nbytes; b += ctx->nbytes) {
for (i = 0; i < ROWS; ++i) {
for (j = 0; j < ctx->columns; ++j) {
temp1[j][i] = ctx->state[j][i] ^ data[b + j * ROWS + i];
temp2[j][i] = data[b + j * ROWS + i];
}
}
P(ctx, temp1);
Q(ctx, temp2);
for (i = 0; i < ROWS; ++i) {
for (j = 0; j < ctx->columns; ++j) {
ctx->state[j][i] ^= temp1[j][i] ^ temp2[j][i];
}
}
}
/* Process extra bytes in padding. */
for (b = 0; b < ctx->pad_nbytes; b += ctx->nbytes) {
for (i = 0; i < ROWS; ++i) {
for (j = 0; j < ctx->columns; ++j) {
temp1[j][i] = ctx->state[j][i] ^ ctx->padding[b + j * ROWS + i];
temp2[j][i] = ctx->padding[b + j * ROWS + i];
}
}
P(ctx, temp1);
Q(ctx, temp2);
for (i = 0; i < ROWS; ++i) {
for (j = 0; j < ctx->columns; ++j) {
ctx->state[j][i] ^= temp1[j][i] ^ temp2[j][i];
}
}
}
}
void Trunc(kupyna_t* ctx, uint8_t* hash_code) {
int i;
size_t hash_nbytes = ctx->hash_nbits / BITS_IN_BYTE;
memcpy(hash_code, (uint8_t*)ctx->state + ctx->nbytes - hash_nbytes, hash_nbytes);
}
void OutputTransformation(kupyna_t* ctx, uint8_t* hash_code) {
int i, j;
uint8_t temp[NB_1024][ROWS];
memcpy(temp, ctx->state, ROWS * NB_1024);
P(ctx, temp);
for (i = 0; i < ROWS; ++i) {
for (j = 0; j < ctx->columns; ++j) {
ctx->state[j][i] ^= temp[j][i];
}
}
Trunc(ctx, hash_code);
}
void KupynaHash(kupyna_t* ctx, uint8_t* data, size_t msg_bit_len, uint8_t* hash_code) {
/* Reinitialize internal state. */
memset(ctx->state, 0, ctx->nbytes);
ctx->state[0][0] = ctx->nbytes;
Pad(ctx, data, msg_bit_len);
Digest(ctx, data);
OutputTransformation(ctx, hash_code);
}
int KupynaKmac(kupyna_t* ctx, uint8_t* key, size_t digest_nbits, uint8_t* data, size_t msg_nbits, uint8_t* mac) {
size_t total_nbytes;
uint8_t* input;
size_t i = 0;
kupyna_t kpad;
kupyna_t mpad;
/* Reinitialize internal state. */
memset(ctx->state, 0, ctx->nbytes);
ctx->state[0][0] = ctx->nbytes;
if (digest_nbits != 256 && digest_nbits != 384 && digest_nbits != 512) {
/* Invalid key and digest size. */
printf("Error: MAC has invalid bit size.");
return -1;
}
KupynaInit(digest_nbits, &kpad);
KupynaInit(digest_nbits, &mpad);
Pad(&kpad, key, digest_nbits);
Pad(&mpad, data, msg_nbits);
total_nbytes = kpad.pad_nbytes + mpad.pad_nbytes + (digest_nbits / 8);
if (kpad.data_nbytes > 0) {
total_nbytes += kpad.data_nbytes;
}
if (mpad.data_nbytes > 0) {
total_nbytes += kpad.data_nbytes;
}
input = (uint8_t*)calloc(total_nbytes, sizeof(uint8_t));
if (kpad.data_nbytes > 0) {
memcpy(input, key, digest_nbits / 8);
i += digest_nbits / 8;
}
memcpy(&input[i], kpad.padding, kpad.pad_nbytes);
i += kpad.pad_nbytes;
if (mpad.data_nbytes > 0) {
memcpy(&input[i], data, mpad.data_nbytes);
i += mpad.data_nbytes;
}
memcpy(&input[i], mpad.padding, mpad.pad_nbytes);
i += mpad.pad_nbytes;
memcpy(&input[i], key, digest_nbits / 8);
/* Invert key. */
while(i < total_nbytes) {
input[i] = input[i] ^ 0xFF;
++i;
}
KupynaHash(ctx, input, total_nbytes * 8, mac);
free(input);
return 0;
}