From 35748654f39a99c226cd14f3b92822eb64bd7037 Mon Sep 17 00:00:00 2001 From: Matthias Schiffer Date: Sun, 1 Dec 2013 07:40:27 +0100 Subject: Add fast SSE2 implementations "xmm" for Salsa20 and Salsa20/12 Public Domain implementations by D. J. Bernstein, see http://cr.yp.to/snuffle.html --- src/crypto/cipher/salsa20/xmm/salsa20_xmm.c | 84 +++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 src/crypto/cipher/salsa20/xmm/salsa20_xmm.c (limited to 'src/crypto/cipher/salsa20/xmm/salsa20_xmm.c') diff --git a/src/crypto/cipher/salsa20/xmm/salsa20_xmm.c b/src/crypto/cipher/salsa20/xmm/salsa20_xmm.c new file mode 100644 index 0000000..3787a0e --- /dev/null +++ b/src/crypto/cipher/salsa20/xmm/salsa20_xmm.c @@ -0,0 +1,84 @@ +/* + Copyright (c) 2012-2013, Matthias Schiffer + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +/* + The assembly implementations were written by D. J. Bernstein and are + Public Domain. For more information see http://cr.yp.to/snuffle.html +*/ + +#include "../../../../crypto.h" +#include "../../../../cpuid.h" + + +#define KEYBYTES 32 + + +#ifdef __x86_64__ +#define crypto_stream_salsa20_xor crypto_stream_salsa20_amd64_xmm6_xor +#endif + +#ifdef __i386__ +#define crypto_stream_salsa20_xor crypto_stream_salsa20_x86_xmm5_xor +#endif + + +int crypto_stream_salsa20_xor(unsigned char *c, const unsigned char *m, unsigned long long mlen, const unsigned char *n, const unsigned char *k); + + +struct fastd_cipher_state { + uint8_t key[KEYBYTES]; +}; + + +static bool salsa20_available(void) { + return fastd_cpuid() & CPUID_SSE2; +} + +static fastd_cipher_state_t* salsa20_init(const uint8_t *key) { + fastd_cipher_state_t *state = malloc(sizeof(fastd_cipher_state_t)); + memcpy(state->key, key, KEYBYTES); + + return state; +} + +static bool salsa20_crypt(const fastd_cipher_state_t *state, fastd_block128_t *out, const fastd_block128_t *in, size_t len, const uint8_t *iv) { + crypto_stream_salsa20_xor(out->b, in->b, len, iv, state->key); + return true; +} + +static void salsa20_free(fastd_cipher_state_t *state) { + if (state) { + secure_memzero(state, sizeof(*state)); + free(state); + } +} + +const fastd_cipher_t fastd_cipher_salsa20_xmm = { + .available = salsa20_available, + + .init = salsa20_init, + .crypt = salsa20_crypt, + .free = salsa20_free, +}; -- cgit v1.2.3