374 lines
14 KiB
C
374 lines
14 KiB
C
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/*
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Plain C implementation of the Haraka256 and Haraka512 permutations.
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include "haraka.h"
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#define HARAKAS_RATE 32
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static const unsigned char haraka_rc[40][16] = {
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{0x9d, 0x7b, 0x81, 0x75, 0xf0, 0xfe, 0xc5, 0xb2, 0x0a, 0xc0, 0x20, 0xe6, 0x4c, 0x70, 0x84, 0x06},
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{0x17, 0xf7, 0x08, 0x2f, 0xa4, 0x6b, 0x0f, 0x64, 0x6b, 0xa0, 0xf3, 0x88, 0xe1, 0xb4, 0x66, 0x8b},
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{0x14, 0x91, 0x02, 0x9f, 0x60, 0x9d, 0x02, 0xcf, 0x98, 0x84, 0xf2, 0x53, 0x2d, 0xde, 0x02, 0x34},
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{0x79, 0x4f, 0x5b, 0xfd, 0xaf, 0xbc, 0xf3, 0xbb, 0x08, 0x4f, 0x7b, 0x2e, 0xe6, 0xea, 0xd6, 0x0e},
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{0x44, 0x70, 0x39, 0xbe, 0x1c, 0xcd, 0xee, 0x79, 0x8b, 0x44, 0x72, 0x48, 0xcb, 0xb0, 0xcf, 0xcb},
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{0x7b, 0x05, 0x8a, 0x2b, 0xed, 0x35, 0x53, 0x8d, 0xb7, 0x32, 0x90, 0x6e, 0xee, 0xcd, 0xea, 0x7e},
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{0x1b, 0xef, 0x4f, 0xda, 0x61, 0x27, 0x41, 0xe2, 0xd0, 0x7c, 0x2e, 0x5e, 0x43, 0x8f, 0xc2, 0x67},
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{0x3b, 0x0b, 0xc7, 0x1f, 0xe2, 0xfd, 0x5f, 0x67, 0x07, 0xcc, 0xca, 0xaf, 0xb0, 0xd9, 0x24, 0x29},
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{0xee, 0x65, 0xd4, 0xb9, 0xca, 0x8f, 0xdb, 0xec, 0xe9, 0x7f, 0x86, 0xe6, 0xf1, 0x63, 0x4d, 0xab},
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{0x33, 0x7e, 0x03, 0xad, 0x4f, 0x40, 0x2a, 0x5b, 0x64, 0xcd, 0xb7, 0xd4, 0x84, 0xbf, 0x30, 0x1c},
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{0x00, 0x98, 0xf6, 0x8d, 0x2e, 0x8b, 0x02, 0x69, 0xbf, 0x23, 0x17, 0x94, 0xb9, 0x0b, 0xcc, 0xb2},
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{0x8a, 0x2d, 0x9d, 0x5c, 0xc8, 0x9e, 0xaa, 0x4a, 0x72, 0x55, 0x6f, 0xde, 0xa6, 0x78, 0x04, 0xfa},
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{0xd4, 0x9f, 0x12, 0x29, 0x2e, 0x4f, 0xfa, 0x0e, 0x12, 0x2a, 0x77, 0x6b, 0x2b, 0x9f, 0xb4, 0xdf},
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{0xee, 0x12, 0x6a, 0xbb, 0xae, 0x11, 0xd6, 0x32, 0x36, 0xa2, 0x49, 0xf4, 0x44, 0x03, 0xa1, 0x1e},
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{0xa6, 0xec, 0xa8, 0x9c, 0xc9, 0x00, 0x96, 0x5f, 0x84, 0x00, 0x05, 0x4b, 0x88, 0x49, 0x04, 0xaf},
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{0xec, 0x93, 0xe5, 0x27, 0xe3, 0xc7, 0xa2, 0x78, 0x4f, 0x9c, 0x19, 0x9d, 0xd8, 0x5e, 0x02, 0x21},
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{0x73, 0x01, 0xd4, 0x82, 0xcd, 0x2e, 0x28, 0xb9, 0xb7, 0xc9, 0x59, 0xa7, 0xf8, 0xaa, 0x3a, 0xbf},
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{0x6b, 0x7d, 0x30, 0x10, 0xd9, 0xef, 0xf2, 0x37, 0x17, 0xb0, 0x86, 0x61, 0x0d, 0x70, 0x60, 0x62},
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{0xc6, 0x9a, 0xfc, 0xf6, 0x53, 0x91, 0xc2, 0x81, 0x43, 0x04, 0x30, 0x21, 0xc2, 0x45, 0xca, 0x5a},
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{0x3a, 0x94, 0xd1, 0x36, 0xe8, 0x92, 0xaf, 0x2c, 0xbb, 0x68, 0x6b, 0x22, 0x3c, 0x97, 0x23, 0x92},
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{0xb4, 0x71, 0x10, 0xe5, 0x58, 0xb9, 0xba, 0x6c, 0xeb, 0x86, 0x58, 0x22, 0x38, 0x92, 0xbf, 0xd3},
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{0x8d, 0x12, 0xe1, 0x24, 0xdd, 0xfd, 0x3d, 0x93, 0x77, 0xc6, 0xf0, 0xae, 0xe5, 0x3c, 0x86, 0xdb},
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{0xb1, 0x12, 0x22, 0xcb, 0xe3, 0x8d, 0xe4, 0x83, 0x9c, 0xa0, 0xeb, 0xff, 0x68, 0x62, 0x60, 0xbb},
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{0x7d, 0xf7, 0x2b, 0xc7, 0x4e, 0x1a, 0xb9, 0x2d, 0x9c, 0xd1, 0xe4, 0xe2, 0xdc, 0xd3, 0x4b, 0x73},
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{0x4e, 0x92, 0xb3, 0x2c, 0xc4, 0x15, 0x14, 0x4b, 0x43, 0x1b, 0x30, 0x61, 0xc3, 0x47, 0xbb, 0x43},
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{0x99, 0x68, 0xeb, 0x16, 0xdd, 0x31, 0xb2, 0x03, 0xf6, 0xef, 0x07, 0xe7, 0xa8, 0x75, 0xa7, 0xdb},
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{0x2c, 0x47, 0xca, 0x7e, 0x02, 0x23, 0x5e, 0x8e, 0x77, 0x59, 0x75, 0x3c, 0x4b, 0x61, 0xf3, 0x6d},
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{0xf9, 0x17, 0x86, 0xb8, 0xb9, 0xe5, 0x1b, 0x6d, 0x77, 0x7d, 0xde, 0xd6, 0x17, 0x5a, 0xa7, 0xcd},
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{0x5d, 0xee, 0x46, 0xa9, 0x9d, 0x06, 0x6c, 0x9d, 0xaa, 0xe9, 0xa8, 0x6b, 0xf0, 0x43, 0x6b, 0xec},
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{0xc1, 0x27, 0xf3, 0x3b, 0x59, 0x11, 0x53, 0xa2, 0x2b, 0x33, 0x57, 0xf9, 0x50, 0x69, 0x1e, 0xcb},
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{0xd9, 0xd0, 0x0e, 0x60, 0x53, 0x03, 0xed, 0xe4, 0x9c, 0x61, 0xda, 0x00, 0x75, 0x0c, 0xee, 0x2c},
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{0x50, 0xa3, 0xa4, 0x63, 0xbc, 0xba, 0xbb, 0x80, 0xab, 0x0c, 0xe9, 0x96, 0xa1, 0xa5, 0xb1, 0xf0},
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{0x39, 0xca, 0x8d, 0x93, 0x30, 0xde, 0x0d, 0xab, 0x88, 0x29, 0x96, 0x5e, 0x02, 0xb1, 0x3d, 0xae},
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{0x42, 0xb4, 0x75, 0x2e, 0xa8, 0xf3, 0x14, 0x88, 0x0b, 0xa4, 0x54, 0xd5, 0x38, 0x8f, 0xbb, 0x17},
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{0xf6, 0x16, 0x0a, 0x36, 0x79, 0xb7, 0xb6, 0xae, 0xd7, 0x7f, 0x42, 0x5f, 0x5b, 0x8a, 0xbb, 0x34},
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{0xde, 0xaf, 0xba, 0xff, 0x18, 0x59, 0xce, 0x43, 0x38, 0x54, 0xe5, 0xcb, 0x41, 0x52, 0xf6, 0x26},
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{0x78, 0xc9, 0x9e, 0x83, 0xf7, 0x9c, 0xca, 0xa2, 0x6a, 0x02, 0xf3, 0xb9, 0x54, 0x9a, 0xe9, 0x4c},
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{0x35, 0x12, 0x90, 0x22, 0x28, 0x6e, 0xc0, 0x40, 0xbe, 0xf7, 0xdf, 0x1b, 0x1a, 0xa5, 0x51, 0xae},
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{0xcf, 0x59, 0xa6, 0x48, 0x0f, 0xbc, 0x73, 0xc1, 0x2b, 0xd2, 0x7e, 0xba, 0x3c, 0x61, 0xc1, 0xa0},
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{0xa1, 0x9d, 0xc5, 0xe9, 0xfd, 0xbd, 0xd6, 0x4a, 0x88, 0x82, 0x28, 0x02, 0x03, 0xcc, 0x6a, 0x75}
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};
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static unsigned char rc[40][16];
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static unsigned char rc_sseed[40][16];
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static const unsigned char sbox[256] = {
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0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe,
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0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4,
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0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7,
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0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3,
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0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09,
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0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3,
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0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe,
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0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85,
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0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92,
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0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c,
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0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19,
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0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14,
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0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2,
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0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5,
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0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25,
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0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
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0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86,
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0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e,
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0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42,
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0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
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};
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#define XT(x) (((x) << 1) ^ ((((x) >> 7) & 1) * 0x1b))
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// Simulate _mm_aesenc_si128 instructions from AESNI
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static void aesenc(unsigned char *s, const unsigned char *rk) {
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uint8_t i, t, u, v[4][4];
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for (i = 0; i < 16; ++i) {
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v[((i / 4) + 4 - (i % 4) ) % 4][i % 4] = sbox[s[i]];
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}
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for (i = 0; i < 4; ++i) {
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t = v[i][0];
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u = v[i][0] ^ v[i][1] ^ v[i][2] ^ v[i][3];
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v[i][0] ^= (uint8_t)(u ^ XT(v[i][0] ^ v[i][1]));
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v[i][1] ^= (uint8_t)(u ^ XT(v[i][1] ^ v[i][2]));
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v[i][2] ^= (uint8_t)(u ^ XT(v[i][2] ^ v[i][3]));
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v[i][3] ^= (uint8_t)(u ^ XT(v[i][3] ^ t));
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}
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for (i = 0; i < 16; ++i) {
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s[i] = v[i / 4][i % 4] ^ rk[i];
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}
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}
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// Simulate _mm_unpacklo_epi32
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static void unpacklo32(unsigned char *t, unsigned char *a, unsigned char *b) {
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unsigned char tmp[16];
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memcpy(tmp, a, 4);
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memcpy(tmp + 4, b, 4);
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memcpy(tmp + 8, a + 4, 4);
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memcpy(tmp + 12, b + 4, 4);
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memcpy(t, tmp, 16);
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}
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// Simulate _mm_unpackhi_epi32
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static void unpackhi32(unsigned char *t, unsigned char *a, unsigned char *b) {
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unsigned char tmp[16];
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memcpy(tmp, a + 8, 4);
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memcpy(tmp + 4, b + 8, 4);
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memcpy(tmp + 8, a + 12, 4);
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memcpy(tmp + 12, b + 12, 4);
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memcpy(t, tmp, 16);
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}
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void PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_tweak_constants(
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const unsigned char *pk_seed, const unsigned char *sk_seed,
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unsigned long long seed_length) {
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unsigned char buf[40 * 16];
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/* Use the standard constants to generate tweaked ones. */
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memcpy(rc, haraka_rc, 40 * 16);
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/* Constants for sk.seed */
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if (sk_seed != NULL) {
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PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka_S(buf, 40 * 16, sk_seed, seed_length);
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memcpy(rc_sseed, buf, 40 * 16);
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}
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/* Constants for pk.seed */
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PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka_S(buf, 40 * 16, pk_seed, seed_length);
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memcpy(rc, buf, 40 * 16);
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}
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static void haraka_S_absorb(unsigned char *s, unsigned int r,
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const unsigned char *m, unsigned long long mlen,
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unsigned char p) {
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unsigned long long i;
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unsigned char t[r];
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while (mlen >= r) {
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// XOR block to state
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for (i = 0; i < r; ++i) {
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s[i] ^= m[i];
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}
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PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka512_perm(s, s);
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mlen -= r;
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m += r;
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}
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for (i = 0; i < r; ++i) {
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t[i] = 0;
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}
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for (i = 0; i < mlen; ++i) {
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t[i] = m[i];
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}
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t[i] = p;
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t[r - 1] |= 128;
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for (i = 0; i < r; ++i) {
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s[i] ^= t[i];
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}
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}
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static void haraka_S_squeezeblocks(unsigned char *h, unsigned long long nblocks,
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unsigned char *s, unsigned int r) {
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while (nblocks > 0) {
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PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka512_perm(s, s);
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memcpy(h, s, HARAKAS_RATE);
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h += r;
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nblocks--;
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}
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}
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void PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka_S_inc_init(uint8_t *s_inc) {
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size_t i;
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for (i = 0; i < 64; i++) {
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s_inc[i] = 0;
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}
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s_inc[64] = 0;
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}
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void PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka_S_inc_absorb(uint8_t *s_inc, const uint8_t *m, size_t mlen) {
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size_t i;
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/* Recall that s_inc[64] is the non-absorbed bytes xored into the state */
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while (mlen + s_inc[64] >= HARAKAS_RATE) {
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for (i = 0; i < (size_t)(HARAKAS_RATE - s_inc[64]); i++) {
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/* Take the i'th byte from message
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xor with the s_inc[64] + i'th byte of the state */
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s_inc[s_inc[64] + i] ^= m[i];
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}
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mlen -= (size_t)(HARAKAS_RATE - s_inc[64]);
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m += HARAKAS_RATE - s_inc[64];
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s_inc[64] = 0;
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PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka512_perm(s_inc, s_inc);
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}
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for (i = 0; i < mlen; i++) {
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||
|
|
s_inc[s_inc[64] + i] ^= m[i];
|
||
|
|
}
|
||
|
|
s_inc[64] = (uint8_t)(mlen + s_inc[64]);
|
||
|
|
}
|
||
|
|
|
||
|
|
void PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka_S_inc_finalize(uint8_t *s_inc) {
|
||
|
|
/* After haraka_S_inc_absorb, we are guaranteed that s_inc[64] < HARAKAS_RATE,
|
||
|
|
so we can always use one more byte for p in the current state. */
|
||
|
|
s_inc[s_inc[64]] ^= 0x1F;
|
||
|
|
s_inc[HARAKAS_RATE - 1] ^= 128;
|
||
|
|
s_inc[64] = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka_S_inc_squeeze(uint8_t *out, size_t outlen, uint8_t *s_inc) {
|
||
|
|
uint8_t i;
|
||
|
|
|
||
|
|
/* First consume any bytes we still have sitting around */
|
||
|
|
for (i = 0; i < outlen && i < s_inc[64]; i++) {
|
||
|
|
/* There are s_inc[64] bytes left, so r - s_inc[64] is the first
|
||
|
|
available byte. We consume from there, i.e., up to r. */
|
||
|
|
out[i] = s_inc[(HARAKAS_RATE - s_inc[64] + i)];
|
||
|
|
}
|
||
|
|
out += i;
|
||
|
|
outlen -= i;
|
||
|
|
s_inc[64] = (uint8_t)(s_inc[64] - i);
|
||
|
|
|
||
|
|
/* Then squeeze the remaining necessary blocks */
|
||
|
|
while (outlen > 0) {
|
||
|
|
PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka512_perm(s_inc, s_inc);
|
||
|
|
|
||
|
|
for (i = 0; i < outlen && i < HARAKAS_RATE; i++) {
|
||
|
|
out[i] = s_inc[i];
|
||
|
|
}
|
||
|
|
out += i;
|
||
|
|
outlen -= i;
|
||
|
|
s_inc[64] = (uint8_t)(HARAKAS_RATE - i);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka_S(
|
||
|
|
unsigned char *out, unsigned long long outlen,
|
||
|
|
const unsigned char *in, unsigned long long inlen) {
|
||
|
|
unsigned long long i;
|
||
|
|
unsigned char s[64];
|
||
|
|
unsigned char d[32];
|
||
|
|
|
||
|
|
for (i = 0; i < 64; i++) {
|
||
|
|
s[i] = 0;
|
||
|
|
}
|
||
|
|
haraka_S_absorb(s, 32, in, inlen, 0x1F);
|
||
|
|
|
||
|
|
haraka_S_squeezeblocks(out, outlen / 32, s, 32);
|
||
|
|
out += (outlen / 32) * 32;
|
||
|
|
|
||
|
|
if (outlen % 32) {
|
||
|
|
haraka_S_squeezeblocks(d, 1, s, 32);
|
||
|
|
for (i = 0; i < outlen % 32; i++) {
|
||
|
|
out[i] = d[i];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka512_perm(unsigned char *out, const unsigned char *in) {
|
||
|
|
int i, j;
|
||
|
|
|
||
|
|
unsigned char s[64], tmp[16];
|
||
|
|
|
||
|
|
memcpy(s, in, 16);
|
||
|
|
memcpy(s + 16, in + 16, 16);
|
||
|
|
memcpy(s + 32, in + 32, 16);
|
||
|
|
memcpy(s + 48, in + 48, 16);
|
||
|
|
|
||
|
|
for (i = 0; i < 5; ++i) {
|
||
|
|
// aes round(s)
|
||
|
|
for (j = 0; j < 2; ++j) {
|
||
|
|
aesenc(s, rc[4 * 2 * i + 4 * j]);
|
||
|
|
aesenc(s + 16, rc[4 * 2 * i + 4 * j + 1]);
|
||
|
|
aesenc(s + 32, rc[4 * 2 * i + 4 * j + 2]);
|
||
|
|
aesenc(s + 48, rc[4 * 2 * i + 4 * j + 3]);
|
||
|
|
}
|
||
|
|
|
||
|
|
// mixing
|
||
|
|
unpacklo32(tmp, s, s + 16);
|
||
|
|
unpackhi32(s, s, s + 16);
|
||
|
|
unpacklo32(s + 16, s + 32, s + 48);
|
||
|
|
unpackhi32(s + 32, s + 32, s + 48);
|
||
|
|
unpacklo32(s + 48, s, s + 32);
|
||
|
|
unpackhi32(s, s, s + 32);
|
||
|
|
unpackhi32(s + 32, s + 16, tmp);
|
||
|
|
unpacklo32(s + 16, s + 16, tmp);
|
||
|
|
}
|
||
|
|
|
||
|
|
memcpy(out, s, 64);
|
||
|
|
}
|
||
|
|
|
||
|
|
void PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka512(unsigned char *out, const unsigned char *in) {
|
||
|
|
int i;
|
||
|
|
|
||
|
|
unsigned char buf[64];
|
||
|
|
|
||
|
|
PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka512_perm(buf, in);
|
||
|
|
/* Feed-forward */
|
||
|
|
for (i = 0; i < 64; i++) {
|
||
|
|
buf[i] = buf[i] ^ in[i];
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Truncated */
|
||
|
|
memcpy(out, buf + 8, 8);
|
||
|
|
memcpy(out + 8, buf + 24, 8);
|
||
|
|
memcpy(out + 16, buf + 32, 8);
|
||
|
|
memcpy(out + 24, buf + 48, 8);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka256(unsigned char *out, const unsigned char *in) {
|
||
|
|
int i, j;
|
||
|
|
|
||
|
|
unsigned char s[32], tmp[16];
|
||
|
|
|
||
|
|
memcpy(s, in, 16);
|
||
|
|
memcpy(s + 16, in + 16, 16);
|
||
|
|
|
||
|
|
for (i = 0; i < 5; ++i) {
|
||
|
|
// aes round(s)
|
||
|
|
for (j = 0; j < 2; ++j) {
|
||
|
|
aesenc(s, rc[2 * 2 * i + 2 * j]);
|
||
|
|
aesenc(s + 16, rc[2 * 2 * i + 2 * j + 1]);
|
||
|
|
}
|
||
|
|
|
||
|
|
// mixing
|
||
|
|
unpacklo32(tmp, s, s + 16);
|
||
|
|
unpackhi32(s + 16, s, s + 16);
|
||
|
|
memcpy(s, tmp, 16);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Feed-forward */
|
||
|
|
for (i = 0; i < 32; i++) {
|
||
|
|
out[i] = in[i] ^ s[i];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void PQCLEAN_SPHINCSHARAKA256FSIMPLE_CLEAN_haraka256_sk(unsigned char *out, const unsigned char *in) {
|
||
|
|
int i, j;
|
||
|
|
|
||
|
|
unsigned char s[32], tmp[16];
|
||
|
|
|
||
|
|
memcpy(s, in, 16);
|
||
|
|
memcpy(s + 16, in + 16, 16);
|
||
|
|
|
||
|
|
for (i = 0; i < 5; ++i) {
|
||
|
|
// aes round(s)
|
||
|
|
for (j = 0; j < 2; ++j) {
|
||
|
|
aesenc(s, rc_sseed[2 * 2 * i + 2 * j]);
|
||
|
|
aesenc(s + 16, rc_sseed[2 * 2 * i + 2 * j + 1]);
|
||
|
|
}
|
||
|
|
|
||
|
|
// mixing
|
||
|
|
unpacklo32(tmp, s, s + 16);
|
||
|
|
unpackhi32(s + 16, s, s + 16);
|
||
|
|
memcpy(s, tmp, 16);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Feed-forward */
|
||
|
|
for (i = 0; i < 32; i++) {
|
||
|
|
out[i] = in[i] ^ s[i];
|
||
|
|
}
|
||
|
|
}
|