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-rw-r--r--src/CMakeLists.txt1
-rw-r--r--src/protocol_ec25519_fhmqvc.c85
-rw-r--r--src/sha256.c139
-rw-r--r--src/sha256.h39
4 files changed, 225 insertions, 39 deletions
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 1fe0873..6c507ae 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -29,6 +29,7 @@ add_executable(fastd
receive.c
resolve.c
send.c
+ sha256.c
shell.c
socket.c
task.c
diff --git a/src/protocol_ec25519_fhmqvc.c b/src/protocol_ec25519_fhmqvc.c
index 01d2103..f6c170b 100644
--- a/src/protocol_ec25519_fhmqvc.c
+++ b/src/protocol_ec25519_fhmqvc.c
@@ -27,19 +27,18 @@
#include "fastd.h"
#include "handshake.h"
#include "peer.h"
+#include "sha256.h"
#include "task.h"
-#include <arpa/inet.h>
#include <libuecc/ecc.h>
#include <crypto_auth_hmacsha256.h>
-#include <crypto_hash_sha256.h>
#define PUBLICKEYBYTES 32
#define SECRETKEYBYTES 32
#define HMACBYTES crypto_auth_hmacsha256_BYTES
-#define HASHBYTES crypto_hash_sha256_BYTES
+#define HASHBYTES FASTD_SHA256_HASH_BYTES
#if HASHBYTES != crypto_auth_hmacsha256_KEYBYTES
@@ -279,16 +278,16 @@ static void respond_handshake(fastd_context_t *ctx, const fastd_socket_t *sock,
const handshake_key_t *handshake_key, const ecc_int256_t *peer_handshake_key, const fastd_handshake_t *handshake, const fastd_method_t *method) {
pr_debug(ctx, "responding handshake with %P[%I]...", peer, remote_addr);
- uint8_t hashinput[5*PUBLICKEYBYTES];
+ uint8_t hashinput[2*PUBLICKEYBYTES];
uint8_t hashbuf[HASHBYTES];
uint8_t hmacbuf[HMACBYTES];
- memcpy(hashinput, handshake_key->public_key.p, PUBLICKEYBYTES);
- memcpy(hashinput+PUBLICKEYBYTES, peer_handshake_key->p, PUBLICKEYBYTES);
- memcpy(hashinput+2*PUBLICKEYBYTES, ctx->conf->protocol_config->public_key.p, PUBLICKEYBYTES);
- memcpy(hashinput+3*PUBLICKEYBYTES, peer->protocol_config->public_key.p, PUBLICKEYBYTES);
-
- crypto_hash_sha256(hashbuf, hashinput, 4*PUBLICKEYBYTES);
+ fastd_sha256_blocks(hashbuf,
+ handshake_key->public_key.p,
+ peer_handshake_key->p,
+ ctx->conf->protocol_config->public_key.p,
+ peer->protocol_config->public_key.p,
+ NULL);
ecc_int256_t d = {{0}}, e = {{0}}, eb, s;
@@ -323,8 +322,13 @@ static void respond_handshake(fastd_context_t *ctx, const fastd_socket_t *sock,
ecc_25519_store_packed(&sigma, &work);
uint8_t shared_handshake_key[HASHBYTES];
- memcpy(hashinput+4*PUBLICKEYBYTES, sigma.p, PUBLICKEYBYTES);
- crypto_hash_sha256(shared_handshake_key, hashinput, 5*PUBLICKEYBYTES);
+ fastd_sha256_blocks(shared_handshake_key,
+ handshake_key->public_key.p,
+ peer_handshake_key->p,
+ ctx->conf->protocol_config->public_key.p,
+ peer->protocol_config->public_key.p,
+ sigma.p,
+ NULL);
memcpy(hashinput, ctx->conf->protocol_config->public_key.p, PUBLICKEYBYTES);
memcpy(hashinput+PUBLICKEYBYTES, handshake_key->public_key.p, PUBLICKEYBYTES);
@@ -346,9 +350,6 @@ static bool establish(fastd_context_t *ctx, fastd_peer_t *peer, const fastd_meth
const fastd_peer_address_t *local_addr, const fastd_peer_address_t *remote_addr, bool initiator,
const ecc_int256_t *A, const ecc_int256_t *B, const ecc_int256_t *X,
const ecc_int256_t *Y, const ecc_int256_t *sigma, uint64_t serial) {
- uint8_t hashinput[5*PUBLICKEYBYTES];
- uint8_t hash[HASHBYTES];
-
if (serial <= peer->protocol_state->last_serial) {
pr_debug(ctx, "ignoring handshake from %P[%I] because of handshake key reuse", peer, remote_addr);
return false;
@@ -372,12 +373,8 @@ static bool establish(fastd_context_t *ctx, fastd_peer_t *peer, const fastd_meth
peer->protocol_state->old_session = (protocol_session_t){};
}
- memcpy(hashinput, X->p, PUBLICKEYBYTES);
- memcpy(hashinput+PUBLICKEYBYTES, Y->p, PUBLICKEYBYTES);
- memcpy(hashinput+2*PUBLICKEYBYTES, A->p, PUBLICKEYBYTES);
- memcpy(hashinput+3*PUBLICKEYBYTES, B->p, PUBLICKEYBYTES);
- memcpy(hashinput+4*PUBLICKEYBYTES, sigma->p, PUBLICKEYBYTES);
- crypto_hash_sha256(hash, hashinput, 5*PUBLICKEYBYTES);
+ uint8_t hash[HASHBYTES];
+ fastd_sha256_blocks(hash, X->p, Y->p, A->p, B->p, sigma->p, NULL);
peer->protocol_state->session.established = ctx->now;
peer->protocol_state->session.handshakes_cleaned = false;
@@ -410,16 +407,16 @@ static void finish_handshake(fastd_context_t *ctx, fastd_socket_t *sock, const f
const fastd_handshake_t *handshake, const fastd_method_t *method) {
pr_debug(ctx, "finishing handshake with %P[%I]...", peer, remote_addr);
- uint8_t hashinput[5*PUBLICKEYBYTES];
+ uint8_t hashinput[2*PUBLICKEYBYTES];
uint8_t hashbuf[HASHBYTES];
uint8_t hmacbuf[HMACBYTES];
- memcpy(hashinput, peer_handshake_key->p, PUBLICKEYBYTES);
- memcpy(hashinput+PUBLICKEYBYTES, handshake_key->public_key.p, PUBLICKEYBYTES);
- memcpy(hashinput+2*PUBLICKEYBYTES, peer->protocol_config->public_key.p, PUBLICKEYBYTES);
- memcpy(hashinput+3*PUBLICKEYBYTES, ctx->conf->protocol_config->public_key.p, PUBLICKEYBYTES);
-
- crypto_hash_sha256(hashbuf, hashinput, 4*PUBLICKEYBYTES);
+ fastd_sha256_blocks(hashbuf,
+ peer_handshake_key->p,
+ handshake_key->public_key.p,
+ peer->protocol_config->public_key.p,
+ ctx->conf->protocol_config->public_key.p,
+ NULL);
ecc_int256_t d = {{0}}, e = {{0}}, da, s;
@@ -454,8 +451,13 @@ static void finish_handshake(fastd_context_t *ctx, fastd_socket_t *sock, const f
ecc_25519_store_packed(&sigma, &work);
uint8_t shared_handshake_key[HASHBYTES];
- memcpy(hashinput+4*PUBLICKEYBYTES, sigma.p, PUBLICKEYBYTES);
- crypto_hash_sha256(shared_handshake_key, hashinput, 5*PUBLICKEYBYTES);
+ fastd_sha256_blocks(shared_handshake_key,
+ peer_handshake_key->p,
+ handshake_key->public_key.p,
+ peer->protocol_config->public_key.p,
+ ctx->conf->protocol_config->public_key.p,
+ sigma.p,
+ NULL);
memcpy(hashinput, peer->protocol_config->public_key.p, PUBLICKEYBYTES);
memcpy(hashinput+PUBLICKEYBYTES, peer_handshake_key->p, PUBLICKEYBYTES);
@@ -489,15 +491,15 @@ static void handle_finish_handshake(fastd_context_t *ctx, fastd_socket_t *sock,
const fastd_handshake_t *handshake, const fastd_method_t *method) {
pr_debug(ctx, "handling handshake finish with %P[%I]...", peer, remote_addr);
- uint8_t hashinput[5*PUBLICKEYBYTES];
+ uint8_t hashinput[2*PUBLICKEYBYTES];
uint8_t hashbuf[HASHBYTES];
- memcpy(hashinput, handshake_key->public_key.p, PUBLICKEYBYTES);
- memcpy(hashinput+PUBLICKEYBYTES, peer_handshake_key->p, PUBLICKEYBYTES);
- memcpy(hashinput+2*PUBLICKEYBYTES, ctx->conf->protocol_config->public_key.p, PUBLICKEYBYTES);
- memcpy(hashinput+3*PUBLICKEYBYTES, peer->protocol_config->public_key.p, PUBLICKEYBYTES);
-
- crypto_hash_sha256(hashbuf, hashinput, 4*PUBLICKEYBYTES);
+ fastd_sha256_blocks(hashbuf,
+ handshake_key->public_key.p,
+ peer_handshake_key->p,
+ ctx->conf->protocol_config->public_key.p,
+ peer->protocol_config->public_key.p,
+ NULL);
ecc_int256_t d = {{0}}, e = {{0}}, eb, s;
@@ -532,8 +534,13 @@ static void handle_finish_handshake(fastd_context_t *ctx, fastd_socket_t *sock,
ecc_25519_store_packed(&sigma, &work);
uint8_t shared_handshake_key[HASHBYTES];
- memcpy(hashinput+4*PUBLICKEYBYTES, sigma.p, PUBLICKEYBYTES);
- crypto_hash_sha256(shared_handshake_key, hashinput, 5*PUBLICKEYBYTES);
+ fastd_sha256_blocks(shared_handshake_key,
+ handshake_key->public_key.p,
+ peer_handshake_key->p,
+ ctx->conf->protocol_config->public_key.p,
+ peer->protocol_config->public_key.p,
+ sigma.p,
+ NULL);
memcpy(hashinput, peer->protocol_config->public_key.p, PUBLICKEYBYTES);
memcpy(hashinput+PUBLICKEYBYTES, peer_handshake_key->p, PUBLICKEYBYTES);
diff --git a/src/sha256.c b/src/sha256.c
new file mode 100644
index 0000000..639185c
--- /dev/null
+++ b/src/sha256.c
@@ -0,0 +1,139 @@
+/*
+ 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 "sha256.h"
+
+#include <stdarg.h>
+#include <stdbool.h>
+#include <string.h>
+
+#include <arpa/inet.h>
+
+
+static inline uint32_t rotr(uint32_t x, int r) {
+ return (x >> r) | (x << (32-r));
+}
+
+void fastd_sha256_blocks(uint8_t out[FASTD_SHA256_HASH_BYTES], ...) {
+ static const uint32_t k[64] = {
+ 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
+ 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
+ 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
+ 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
+ 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
+ 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
+ 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
+ 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
+ };
+
+ uint32_t h[8] = {
+ 0x6a09e667,
+ 0xbb67ae85,
+ 0x3c6ef372,
+ 0xa54ff53a,
+ 0x510e527f,
+ 0x9b05688c,
+ 0x1f83d9ab,
+ 0x5be0cd19
+ };
+ unsigned count = 0, i;
+ va_list ap;
+ const uint32_t *in1, *in2;
+
+ va_start(ap, out);
+
+ do {
+ uint32_t w[64], v[8];
+
+ in1 = va_arg(ap, const uint32_t*);
+
+ if (in1) {
+ count++;
+ in2 = va_arg(ap, const uint32_t*);
+
+ if (in2)
+ count++;
+ }
+ else {
+ in2 = NULL;
+ }
+
+ if (in1) {
+ for (i = 0; i < 8; i++)
+ w[i] = ntohl(in1[i]);
+ }
+ else {
+ w[0] = 0x80000000;
+ memset(w+1, 0, 7*sizeof(uint32_t));
+ }
+
+ if (in2) {
+ for (i = 0; i < 8; i++)
+ w[i+8] = ntohl(in2[i]);
+ }
+ else {
+ w[8] = in1 ? 0x80000000 : 0;
+ memset(w+9, 0, 6*sizeof(uint32_t));
+ w[15] = count << 8;
+ }
+
+ for (i = 16; i < 64; i++) {
+ uint32_t s0 = rotr(w[i-15], 7) ^ rotr(w[i-15], 18) ^ (w[i-15] >> 3);
+ uint32_t s1 = rotr(w[i-2], 17) ^ rotr(w[i-2], 19) ^ (w[i-2] >> 10);
+ w[i] = w[i-16] + s0 + w[i-7] + s1;
+ }
+
+ memcpy(v, h, sizeof(v));
+
+ for (i = 0; i < 64; i++) {
+ uint32_t s1 = rotr(v[4], 6) ^ rotr(v[4], 11) ^ rotr(v[4], 25);
+ uint32_t ch = (v[4] & v[5]) ^ ((~v[4]) & v[6]);
+ uint32_t temp1 = v[7] + s1 + ch + k[i] + w[i];
+ uint32_t s0 = rotr(v[0], 2) ^ rotr(v[0], 13) ^ rotr(v[0], 22);
+ uint32_t maj = (v[0] & v[1]) ^ (v[0] & v[2]) ^ (v[1] & v[2]);
+ uint32_t temp2 = s0 + maj;
+
+ v[7] = v[6];
+ v[6] = v[5];
+ v[5] = v[4];
+ v[4] = v[3] + temp1;
+ v[3] = v[2];
+ v[2] = v[1];
+ v[1] = v[0];
+ v[0] = temp1 + temp2;
+ }
+
+ for (i = 0; i < 8; i++)
+ h[i] += v[i];
+
+ } while (in1 && in2);
+
+ va_end(ap);
+
+ uint32_t *out32 = (uint32_t*)out;
+ for (i = 0; i < 8; i++)
+ out32[i] = htonl(h[i]);
+}
diff --git a/src/sha256.h b/src/sha256.h
new file mode 100644
index 0000000..c6acadb
--- /dev/null
+++ b/src/sha256.h
@@ -0,0 +1,39 @@
+/*
+ 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.
+*/
+
+
+#ifndef _FASTD_SHA256_H_
+#define _FASTD_SHA256_H_
+
+#include <stdint.h>
+
+
+#define FASTD_SHA256_HASH_BYTES 32
+#define FASTD_SHA256_HASH_BLOCK_BYTES 32
+
+
+void fastd_sha256_blocks(uint8_t out[FASTD_SHA256_HASH_BYTES], ...);
+
+#endif /* _FASTD_SHA256_H_ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 09:56:15 +0100