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-rw-r--r--src/crypto/cipher/salsa20/xmm/salsa20_xmm.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/src/crypto/cipher/salsa20/xmm/salsa20_xmm.c b/src/crypto/cipher/salsa20/xmm/salsa20_xmm.c
new file mode 100644
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+++ b/src/crypto/cipher/salsa20/xmm/salsa20_xmm.c
@@ -0,0 +1,84 @@
+/*
+ Copyright (c) 2012-2013, Matthias Schiffer <mschiffer@universe-factory.net>
+ 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,
+};