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Diffstat (limited to 'src/protocol_ec25519_fhmqvc.c')
-rw-r--r--src/protocol_ec25519_fhmqvc.c85
1 files changed, 46 insertions, 39 deletions
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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 04:19:03 +0100