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Current Path: /usr/src/contrib/bearssl/src/symcipher

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

📁 ..
📄 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: chacha20_ct.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"

/* see bearssl_block.h */
uint32_t
br_chacha20_ct_run(const void *key,
	const void *iv, uint32_t cc, void *data, size_t len)
{
	unsigned char *buf;
	uint32_t kw[8], ivw[3];
	size_t u;

static const uint32_t CW[] = {
		0x61707865, 0x3320646e, 0x79622d32, 0x6b206574
	};

buf = data;
	for (u = 0; u < 8; u ++) {
		kw[u] = br_dec32le((const unsigned char *)key + (u << 2));
	}
	for (u = 0; u < 3; u ++) {
		ivw[u] = br_dec32le((const unsigned char *)iv + (u << 2));
	}
	while (len > 0) {
		uint32_t state[16];
		int i;
		size_t clen;
		unsigned char tmp[64];

memcpy(&state[0], CW, sizeof CW);
		memcpy(&state[4], kw, sizeof kw);
		state[12] = cc;
		memcpy(&state[13], ivw, sizeof ivw);
		for (i = 0; i < 10; i ++) {

#define QROUND(a, b, c, d)   do { \
		state[a] += state[b]; \
		state[d] ^= state[a]; \
		state[d] = (state[d] << 16) | (state[d] >> 16); \
		state[c] += state[d]; \
		state[b] ^= state[c]; \
		state[b] = (state[b] << 12) | (state[b] >> 20); \
		state[a] += state[b]; \
		state[d] ^= state[a]; \
		state[d] = (state[d] <<  8) | (state[d] >> 24); \
		state[c] += state[d]; \
		state[b] ^= state[c]; \
		state[b] = (state[b] <<  7) | (state[b] >> 25); \
	} while (0)

QROUND( 0,  4,  8, 12);
			QROUND( 1,  5,  9, 13);
			QROUND( 2,  6, 10, 14);
			QROUND( 3,  7, 11, 15);
			QROUND( 0,  5, 10, 15);
			QROUND( 1,  6, 11, 12);
			QROUND( 2,  7,  8, 13);
			QROUND( 3,  4,  9, 14);

#undef QROUND

}
		for (u = 0; u < 4; u ++) {
			br_enc32le(&tmp[u << 2], state[u] + CW[u]);
		}
		for (u = 4; u < 12; u ++) {
			br_enc32le(&tmp[u << 2], state[u] + kw[u - 4]);
		}
		br_enc32le(&tmp[48], state[12] + cc);
		for (u = 13; u < 16; u ++) {
			br_enc32le(&tmp[u << 2], state[u] + ivw[u - 13]);
		}

clen = len < 64 ? len : 64;
		for (u = 0; u < clen; u ++) {
			buf[u] ^= tmp[u];
		}
		buf += clen;
		len -= clen;
		cc ++;
	}
	return cc;
}

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Editing: chacha20_ct.c

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