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usr / src / contrib / bearssl / src / symcipher /

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📄 aes_big_cbcdec.c(2.09 KB)
📄 aes_big_cbcenc.c(2.04 KB)
📄 aes_big_ctr.c(2.27 KB)
📄 aes_big_ctrcbc.c(3.81 KB)
📄 aes_big_dec.c(9.29 KB)
📄 aes_big_enc.c(6.34 KB)
📄 aes_common.c(3.86 KB)
📄 aes_ct.c(6.91 KB)
📄 aes_ct64.c(8.83 KB)
📄 aes_ct64_cbcdec.c(2.89 KB)
📄 aes_ct64_cbcenc.c(2.56 KB)
📄 aes_ct64_ctr.c(3.13 KB)
📄 aes_ct64_ctrcbc.c(10.98 KB)
📄 aes_ct64_dec.c(4.11 KB)
📄 aes_ct64_enc.c(3.03 KB)
📄 aes_ct_cbcdec.c(3.13 KB)
📄 aes_ct_cbcenc.c(2.68 KB)
📄 aes_ct_ctr.c(3.03 KB)
📄 aes_ct_ctrcbc.c(10.39 KB)
📄 aes_ct_dec.c(4.63 KB)
📄 aes_ct_enc.c(2.89 KB)
📄 aes_pwr8.c(8.85 KB)
📄 aes_pwr8_cbcdec.c(14.52 KB)
📄 aes_pwr8_cbcenc.c(8.8 KB)
📄 aes_pwr8_ctr.c(15.47 KB)
📄 aes_pwr8_ctrcbc.c(22.02 KB)
📄 aes_small_cbcdec.c(2.1 KB)
📄 aes_small_cbcenc.c(2.06 KB)
📄 aes_small_ctr.c(2.29 KB)
📄 aes_small_ctrcbc.c(3.86 KB)
📄 aes_small_dec.c(5.04 KB)
📄 aes_small_enc.c(3.12 KB)
📄 aes_x86ni.c(5.94 KB)
📄 aes_x86ni_cbcdec.c(6.48 KB)
📄 aes_x86ni_cbcenc.c(3.39 KB)
📄 aes_x86ni_ctr.c(6.47 KB)
📄 aes_x86ni_ctrcbc.c(16.84 KB)
📄 chacha20_ct.c(2.96 KB)
📄 chacha20_sse2.c(5.7 KB)
📄 des_ct.c(12.14 KB)
📄 des_ct_cbcdec.c(2.45 KB)
📄 des_ct_cbcenc.c(2.11 KB)
📄 des_support.c(4.01 KB)
📄 des_tab.c(10.24 KB)
📄 des_tab_cbcdec.c(2.38 KB)
📄 des_tab_cbcenc.c(2.04 KB)
📄 poly1305_ctmul.c(7.2 KB)
📄 poly1305_ctmul32.c(8.23 KB)
📄 poly1305_ctmulq.c(11.32 KB)
📄 poly1305_i15.c(5.32 KB)

Editing: aes_small_enc.c

/*
 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining 
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be 
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include "inner.h"

#define S   br_aes_S

static void
add_round_key(unsigned *state, const uint32_t *skeys)
{
	int i;

for (i = 0; i < 16; i += 4) {
		uint32_t k;

k = *skeys ++;
		state[i + 0] ^= (unsigned)(k >> 24);
		state[i + 1] ^= (unsigned)(k >> 16) & 0xFF;
		state[i + 2] ^= (unsigned)(k >> 8) & 0xFF;
		state[i + 3] ^= (unsigned)k & 0xFF;
	}
}

static void
sub_bytes(unsigned *state)
{
	int i;

for (i = 0; i < 16; i ++) {
		state[i] = S[state[i]];
	}
}

static void
shift_rows(unsigned *state)
{
	unsigned tmp;

tmp = state[1];
	state[1] = state[5];
	state[5] = state[9];
	state[9] = state[13];
	state[13] = tmp;

tmp = state[2];
	state[2] = state[10];
	state[10] = tmp;
	tmp = state[6];
	state[6] = state[14];
	state[14] = tmp;

tmp = state[15];
	state[15] = state[11];
	state[11] = state[7];
	state[7] = state[3];
	state[3] = tmp;
}

static void
mix_columns(unsigned *state)
{
	int i;

for (i = 0; i < 16; i += 4) {
		unsigned s0, s1, s2, s3;
		unsigned t0, t1, t2, t3;

s0 = state[i + 0];
		s1 = state[i + 1];
		s2 = state[i + 2];
		s3 = state[i + 3];
		t0 = (s0 << 1) ^ s1 ^ (s1 << 1) ^ s2 ^ s3;
		t1 = s0 ^ (s1 << 1) ^ s2 ^ (s2 << 1) ^ s3;
		t2 = s0 ^ s1 ^ (s2 << 1) ^ s3 ^ (s3 << 1);
		t3 = s0 ^ (s0 << 1) ^ s1 ^ s2 ^ (s3 << 1);
		state[i + 0] = t0 ^ ((unsigned)(-(int)(t0 >> 8)) & 0x11B);
		state[i + 1] = t1 ^ ((unsigned)(-(int)(t1 >> 8)) & 0x11B);
		state[i + 2] = t2 ^ ((unsigned)(-(int)(t2 >> 8)) & 0x11B);
		state[i + 3] = t3 ^ ((unsigned)(-(int)(t3 >> 8)) & 0x11B);
	}
}

/* see inner.h */
void
br_aes_small_encrypt(unsigned num_rounds, const uint32_t *skey, void *data)
{
	unsigned char *buf;
	unsigned state[16];
	unsigned u;

buf = data;
	for (u = 0; u < 16; u ++) {
		state[u] = buf[u];
	}
	add_round_key(state, skey);
	for (u = 1; u < num_rounds; u ++) {
		sub_bytes(state);
		shift_rows(state);
		mix_columns(state);
		add_round_key(state, skey + (u << 2));
	}
	sub_bytes(state);
	shift_rows(state);
	add_round_key(state, skey + (num_rounds << 2));
	for (u = 0; u < 16; u ++) {
		buf[u] = state[u];
	}
}

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Editing: aes_small_enc.c

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