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-rw-r--r--src/methods/aes128_gcm/aes128_gcm.c20
1 files changed, 12 insertions, 8 deletions
diff --git a/src/methods/aes128_gcm/aes128_gcm.c b/src/methods/aes128_gcm/aes128_gcm.c
index 297031b..20f393f 100644
--- a/src/methods/aes128_gcm/aes128_gcm.c
+++ b/src/methods/aes128_gcm/aes128_gcm.c
@@ -32,7 +32,10 @@
struct fastd_method_session_state {
fastd_method_common_t common;
- fastd_crypto_aes128ctr_state_t *cstate_aes128ctr;
+ const fastd_cipher_t *aes128_ctr;
+ fastd_cipher_context_t *aes128_ctr_ctx;
+ fastd_cipher_state_t *aes128_ctr_state;
+
fastd_crypto_ghash_state_t *cstate_ghash;
};
@@ -68,14 +71,15 @@ static fastd_method_session_state_t* method_session_init(fastd_context_t *ctx, c
fastd_method_common_init(ctx, &session->common, initiator);
- fastd_block128_t key;
- memcpy(key.b, secret, sizeof(fastd_block128_t));
- session->cstate_aes128ctr = ctx->conf->crypto_aes128ctr->set_key(ctx, ctx->crypto_aes128ctr, &key);
+ if (!fastd_cipher_get_by_name(ctx, "aes128-ctr", &session->aes128_ctr, &session->aes128_ctr_ctx))
+ exit_bug(ctx, "aes128-gcm: can't instanciate aes128-ctr");
+
+ session->aes128_ctr_state = session->aes128_ctr->init_state(ctx, session->aes128_ctr_ctx, secret);
static const fastd_block128_t zeroblock = {};
fastd_block128_t H;
- ctx->conf->crypto_aes128ctr->crypt(ctx, session->cstate_aes128ctr, &H, &zeroblock, sizeof(fastd_block128_t), &zeroblock);
+ session->aes128_ctr->crypt(ctx, session->aes128_ctr_state, &H, &zeroblock, sizeof(fastd_block128_t), &zeroblock);
session->cstate_ghash = ctx->conf->crypto_ghash->set_h(ctx, ctx->crypto_ghash, &H);
@@ -107,7 +111,7 @@ static void method_session_superseded(fastd_context_t *ctx, fastd_method_session
static void method_session_free(fastd_context_t *ctx, fastd_method_session_state_t *session) {
if (session) {
- ctx->conf->crypto_aes128ctr->free_state(ctx, session->cstate_aes128ctr);
+ session->aes128_ctr->free_state(ctx, session->aes128_ctr_state);
ctx->conf->crypto_ghash->free_state(ctx, session->cstate_ghash);
secure_memzero(session, sizeof(fastd_method_session_state_t));
@@ -145,7 +149,7 @@ static bool method_encrypt(fastd_context_t *ctx, fastd_peer_t *peer UNUSED, fast
fastd_block128_t *outblocks = out->data;
fastd_block128_t sig;
- bool ok = ctx->conf->crypto_aes128ctr->crypt(ctx, session->cstate_aes128ctr, outblocks, inblocks, n_blocks*sizeof(fastd_block128_t), &nonce);
+ bool ok = session->aes128_ctr->crypt(ctx, session->aes128_ctr_state, outblocks, inblocks, n_blocks*sizeof(fastd_block128_t), &nonce);
if (ok) {
if (tail_len)
@@ -201,7 +205,7 @@ static bool method_decrypt(fastd_context_t *ctx, fastd_peer_t *peer, fastd_metho
fastd_block128_t *outblocks = out->data;
fastd_block128_t sig;
- bool ok = ctx->conf->crypto_aes128ctr->crypt(ctx, session->cstate_aes128ctr, outblocks, inblocks, n_blocks*sizeof(fastd_block128_t), &nonce);
+ bool ok = session->aes128_ctr->crypt(ctx, session->aes128_ctr_state, outblocks, inblocks, n_blocks*sizeof(fastd_block128_t), &nonce);
if (ok) {
if (tail_len)