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authorMatthias Schiffer <mschiffer@universe-factory.net>2013-11-02 16:01:16 +0100
committerMatthias Schiffer <mschiffer@universe-factory.net>2013-11-02 16:01:16 +0100
commit4496be6e29732189769b78f63e491dacb23c961b (patch)
tree5882550f4cf9b516fdd613bbaf4535a7f59d981a /src/crypto.c
parent20a95ef2731ce21acfe5c1ba97b40001217b0216 (diff)
downloadfastd-4496be6e29732189769b78f63e491dacb23c961b.tar
fastd-4496be6e29732189769b78f63e491dacb23c961b.zip
Convert ghash to the new crypto algorithm scheme
Diffstat (limited to 'src/crypto.c')
-rw-r--r--src/crypto.c147
1 files changed, 0 insertions, 147 deletions
diff --git a/src/crypto.c b/src/crypto.c
deleted file mode 100644
index 1583349..0000000
--- a/src/crypto.c
+++ /dev/null
@@ -1,147 +0,0 @@
-/*
- 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.
-*/
-
-
-#include "fastd.h"
-#include "crypto.h"
-
-
-#ifdef USE_CRYPTO_GHASH
-#ifdef WITH_CRYPTO_GHASH_BUILTIN
-
-struct fastd_crypto_ghash_state {
- fastd_block128_t H[32][16];
-};
-
-
-static const fastd_block128_t r = { .b = {0xe1} };
-
-
-static inline uint8_t shr(fastd_block128_t *out, const fastd_block128_t *in, int n) {
- size_t i;
- uint8_t c = 0;
-
- for (i = 0; i < sizeof(fastd_block128_t); i++) {
- uint8_t c2 = in->b[i] << (8-n);
- out->b[i] = (in->b[i] >> n) | c;
- c = c2;
- }
-
- return (c >> (8-n));
-}
-
-static inline void mulH_a(fastd_block128_t *x, const fastd_crypto_ghash_state_t *cstate) {
- fastd_block128_t out = {};
-
- int i;
- for (i = 0; i < 16; i++) {
- xor_a(&out, &cstate->H[2*i][x->b[i]>>4]);
- xor_a(&out, &cstate->H[2*i+1][x->b[i]&0xf]);
- }
-
- *x = out;
-}
-
-
-static fastd_crypto_ghash_context_t* ghash_init(fastd_context_t *ctx UNUSED) {
- return (fastd_crypto_ghash_context_t*)1;
-}
-
-static fastd_crypto_ghash_state_t* ghash_set_h(fastd_context_t *ctx UNUSED, const fastd_crypto_ghash_context_t *cctx UNUSED, const fastd_block128_t *h) {
- fastd_crypto_ghash_state_t *cstate = malloc(sizeof(fastd_crypto_ghash_state_t));
-
- fastd_block128_t Hbase[4];
- fastd_block128_t Rbase[4];
-
- Hbase[0] = *h;
- Rbase[0] = r;
-
- int i;
- for (i = 1; i < 4; i++) {
- uint8_t carry = shr(&Hbase[i], &Hbase[i-1], 1);
- if (carry)
- xor_a(&Hbase[i], &r);
-
- shr(&Rbase[i], &Rbase[i-1], 1);
- }
-
- fastd_block128_t R[16];
- memset(cstate->H, 0, sizeof(cstate->H));
- memset(R, 0, sizeof(R));
-
- for (i = 0; i < 16; i++) {
- int j;
- for (j = 0; j < 4; j++) {
- if (i & (8 >> j)) {
- xor_a(&cstate->H[0][i], &Hbase[j]);
- xor_a(&R[i], &Rbase[j]);
- }
- }
- }
-
- for (i = 1; i < 32; i++) {
- int j;
-
- for (j = 0; j < 16; j++) {
- uint8_t carry = shr(&cstate->H[i][j], &cstate->H[i-1][j], 4);
- xor_a(&cstate->H[i][j], &R[carry]);
- }
- }
-
- return cstate;
-}
-
-static bool ghash_hash(fastd_context_t *ctx UNUSED, const fastd_crypto_ghash_state_t *cstate, fastd_block128_t *out, const fastd_block128_t *in, size_t n_blocks) {
- memset(out, 0, sizeof(fastd_block128_t));
-
- size_t i;
- for (i = 0; i < n_blocks; i++) {
- xor_a(out, &in[i]);
- mulH_a(out, cstate);
- }
-
- return true;
-}
-
-static void ghash_free_state(fastd_context_t *ctx UNUSED, fastd_crypto_ghash_state_t *cstate) {
- free(cstate);
-}
-
-static void ghash_free(fastd_context_t *ctx UNUSED, fastd_crypto_ghash_context_t *cctx UNUSED) {
-}
-
-const fastd_crypto_ghash_t fastd_crypto_ghash_builtin = {
- .name = "builtin",
-
- .init = ghash_init,
- .set_h = ghash_set_h,
- .hash = ghash_hash,
-
- .free_state = ghash_free_state,
- .free = ghash_free,
-};
-
-#endif
-#endif