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-rw-r--r--src/crypto/mac/ghash/CMakeLists.txt1
-rw-r--r--src/crypto/mac/ghash/builtin/ghash_builtin.c46
-rw-r--r--src/crypto/mac/ghash/tiny/CMakeLists.txt3
-rw-r--r--src/crypto/mac/ghash/tiny/ghash_tiny.c147
4 files changed, 20 insertions, 177 deletions
diff --git a/src/crypto/mac/ghash/CMakeLists.txt b/src/crypto/mac/ghash/CMakeLists.txt
index 481e77f..7d44b8a 100644
--- a/src/crypto/mac/ghash/CMakeLists.txt
+++ b/src/crypto/mac/ghash/CMakeLists.txt
@@ -1,3 +1,2 @@
fastd_mac(ghash)
add_subdirectory(builtin)
-add_subdirectory(tiny)
diff --git a/src/crypto/mac/ghash/builtin/ghash_builtin.c b/src/crypto/mac/ghash/builtin/ghash_builtin.c
index 947dc34..34e118a 100644
--- a/src/crypto/mac/ghash/builtin/ghash_builtin.c
+++ b/src/crypto/mac/ghash/builtin/ghash_builtin.c
@@ -28,7 +28,7 @@
struct fastd_mac_state {
- fastd_block128_t H[16][256];
+ fastd_block128_t H[32][16];
};
@@ -40,30 +40,22 @@ static inline uint8_t shr(fastd_block128_t *out, const fastd_block128_t *in, int
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 = in->b[i] << (8-n);
+ c = c2;
}
return (c >> (8-n));
}
-static inline uint8_t shr8(fastd_block128_t *out, const fastd_block128_t *in) {
- size_t i;
-
- out->b[0] = 0;
-
- for (i = 1; i < sizeof(fastd_block128_t); i++)
- out->b[i] = in->b[i-1];
-
- return in->b[sizeof(fastd_block128_t)-1];
-}
-
static inline void mulH_a(fastd_block128_t *x, const fastd_mac_state_t *cstate) {
fastd_block128_t out = {};
int i;
- for (i = 0; i < 16; i++)
- xor_a(&out, &cstate->H[i][x->b[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;
}
@@ -78,16 +70,16 @@ static size_t ghash_key_length(fastd_context_t *ctx UNUSED, const fastd_mac_cont
}
static fastd_mac_state_t* ghash_init_state(fastd_context_t *ctx UNUSED, const fastd_mac_context_t *mctx UNUSED, const uint8_t *key) {
- fastd_mac_state_t *state = calloc(1, sizeof(fastd_mac_state_t));
+ fastd_mac_state_t *state = malloc(sizeof(fastd_mac_state_t));
- fastd_block128_t Hbase[8];
- fastd_block128_t Rbase[8];
+ fastd_block128_t Hbase[4];
+ fastd_block128_t Rbase[4];
memcpy(&Hbase[0], key, sizeof(fastd_block128_t));
Rbase[0] = r;
int i;
- for (i = 1; i < 8; i++) {
+ for (i = 1; i < 4; i++) {
uint8_t carry = shr(&Hbase[i], &Hbase[i-1], 1);
if (carry)
xor_a(&Hbase[i], &r);
@@ -95,23 +87,25 @@ static fastd_mac_state_t* ghash_init_state(fastd_context_t *ctx UNUSED, const fa
shr(&Rbase[i], &Rbase[i-1], 1);
}
- fastd_block128_t R[256] = {};
+ fastd_block128_t R[16];
+ memset(state->H, 0, sizeof(state->H));
+ memset(R, 0, sizeof(R));
- for (i = 0; i < 256; i++) {
+ for (i = 0; i < 16; i++) {
int j;
- for (j = 0; j < 8; j++) {
- if (i & (0x80 >> j)) {
+ for (j = 0; j < 4; j++) {
+ if (i & (8 >> j)) {
xor_a(&state->H[0][i], &Hbase[j]);
xor_a(&R[i], &Rbase[j]);
}
}
}
- for (i = 1; i < 16; i++) {
+ for (i = 1; i < 32; i++) {
int j;
- for (j = 0; j < 256; j++) {
- uint8_t carry = shr8(&state->H[i][j], &state->H[i-1][j]);
+ for (j = 0; j < 16; j++) {
+ uint8_t carry = shr(&state->H[i][j], &state->H[i-1][j], 4);
xor_a(&state->H[i][j], &R[carry]);
}
}
diff --git a/src/crypto/mac/ghash/tiny/CMakeLists.txt b/src/crypto/mac/ghash/tiny/CMakeLists.txt
deleted file mode 100644
index d16d098..0000000
--- a/src/crypto/mac/ghash/tiny/CMakeLists.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-fastd_mac_impl(ghash tiny
- ghash_tiny.c
-)
diff --git a/src/crypto/mac/ghash/tiny/ghash_tiny.c b/src/crypto/mac/ghash/tiny/ghash_tiny.c
deleted file mode 100644
index f4a06b0..0000000
--- a/src/crypto/mac/ghash/tiny/ghash_tiny.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"
-
-
-struct fastd_mac_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_mac_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_mac_context_t* ghash_initialize(fastd_context_t *ctx UNUSED) {
- return NULL;
-}
-
-static size_t ghash_key_length(fastd_context_t *ctx UNUSED, const fastd_mac_context_t *cctx UNUSED) {
- return sizeof(fastd_block128_t);
-}
-
-static fastd_mac_state_t* ghash_init_state(fastd_context_t *ctx UNUSED, const fastd_mac_context_t *mctx UNUSED, const uint8_t *key) {
- fastd_mac_state_t *state = malloc(sizeof(fastd_mac_state_t));
-
- fastd_block128_t Hbase[4];
- fastd_block128_t Rbase[4];
-
- memcpy(&Hbase[0], key, sizeof(fastd_block128_t));
- 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(state->H, 0, sizeof(state->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(&state->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(&state->H[i][j], &state->H[i-1][j], 4);
- xor_a(&state->H[i][j], &R[carry]);
- }
- }
-
- return state;
-}
-
-static bool ghash_hash(fastd_context_t *ctx UNUSED, const fastd_mac_state_t *state, 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, state);
- }
-
- return true;
-}
-
-static void ghash_free_state(fastd_context_t *ctx UNUSED, fastd_mac_state_t *state) {
- free(state);
-}
-
-static void ghash_free(fastd_context_t *ctx UNUSED, fastd_mac_context_t *mctx UNUSED) {
-}
-
-const fastd_mac_t fastd_mac_ghash_tiny = {
- .name = "tiny",
-
- .initialize = ghash_initialize,
-
- .key_length = ghash_key_length,
- .init_state = ghash_init_state,
-
- .hash = ghash_hash,
-
- .free_state = ghash_free_state,
- .free = ghash_free,
-};
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