From c62a0f592c49b41d393fae580ce9f1293ee7a16d Mon Sep 17 00:00:00 2001 From: Matthias Schiffer Date: Mon, 25 Nov 2013 23:18:11 +0100 Subject: Move crypto algorithm information out of implementation --- src/methods/cipher_test/cipher_test.c | 50 +++++++++++++++++++++-------------- 1 file changed, 30 insertions(+), 20 deletions(-) (limited to 'src/methods/cipher_test') diff --git a/src/methods/cipher_test/cipher_test.c b/src/methods/cipher_test/cipher_test.c index b9a7881..573e90a 100644 --- a/src/methods/cipher_test/cipher_test.c +++ b/src/methods/cipher_test/cipher_test.c @@ -31,13 +31,14 @@ struct fastd_method_session_state { fastd_method_common_t common; + const fastd_cipher_info_t *cipher_info; const fastd_cipher_t *cipher; const fastd_cipher_context_t *cipher_ctx; fastd_cipher_state_t *cipher_state; }; -static bool cipher_get(fastd_context_t *ctx, const char *name, const fastd_cipher_t **cipher, const fastd_cipher_context_t **cctx) { +static bool cipher_get(fastd_context_t *ctx, const char *name, const fastd_cipher_info_t **info, const fastd_cipher_t **cipher, const fastd_cipher_context_t **cctx) { size_t len = strlen(name); if (len < 12) @@ -50,27 +51,36 @@ static bool cipher_get(fastd_context_t *ctx, const char *name, const fastd_ciphe memcpy(cipher_name, name, len-12); cipher_name[len-12] = 0; + const fastd_cipher_info_t *cipher_info = NULL; + if (ctx) { - *cipher = fastd_cipher_get_by_name(ctx, cipher_name, cctx); - return *cipher; + *cipher = fastd_cipher_get_by_name(ctx, cipher_name, &cipher_info, cctx); + if (!*cipher) + return false; } else { - return fastd_cipher_available(cipher_name); + cipher_info = fastd_cipher_info_get_by_name(cipher_name); + if (!cipher_info) + return false; } + + if (info) + *info = cipher_info; + + return true; } static bool method_provides(const char *name) { - return cipher_get(NULL, name, NULL, NULL); + return cipher_get(NULL, name, NULL, NULL, NULL); } static size_t method_key_length(fastd_context_t *ctx, const char *name) { - const fastd_cipher_t *cipher = NULL; - const fastd_cipher_context_t *cctx; - if (!cipher_get(ctx, name, &cipher, &cctx)) + const fastd_cipher_info_t *info; + if (!cipher_get(NULL, name, &info, NULL, NULL)) exit_bug(ctx, "cipher-test: can't get cipher key length"); - return cipher->key_length; + return info->key_length; } static fastd_method_session_state_t* method_session_init(fastd_context_t *ctx, const char *name, const uint8_t *secret, bool initiator) { @@ -78,7 +88,7 @@ static fastd_method_session_state_t* method_session_init(fastd_context_t *ctx, c fastd_method_common_init(ctx, &session->common, initiator); - if (!cipher_get(ctx, name, &session->cipher, &session->cipher_ctx)) + if (!cipher_get(ctx, name, &session->cipher_info, &session->cipher, &session->cipher_ctx)) exit_bug(ctx, "cipher-test: can't instanciate cipher"); session->cipher_state = session->cipher->init_state(ctx, session->cipher_ctx, secret); @@ -118,11 +128,11 @@ static bool method_encrypt(fastd_context_t *ctx, fastd_peer_t *peer UNUSED, fast if (tail_len) memset(in.data+in.len, 0, tail_len); - uint8_t nonce[session->cipher->iv_length]; - if (session->cipher->iv_length) { - memset(nonce, 0, session->cipher->iv_length); - memcpy(nonce, session->common.send_nonce, min_size_t(COMMON_NONCEBYTES, session->cipher->iv_length)); - nonce[session->cipher->iv_length-1] = 1; + uint8_t nonce[session->cipher_info->iv_length]; + if (session->cipher_info->iv_length) { + memset(nonce, 0, session->cipher_info->iv_length); + memcpy(nonce, session->common.send_nonce, min_size_t(COMMON_NONCEBYTES, session->cipher_info->iv_length)); + nonce[session->cipher_info->iv_length-1] = 1; } int n_blocks = block_count(in.len, sizeof(fastd_block128_t)); @@ -161,11 +171,11 @@ static bool method_decrypt(fastd_context_t *ctx, fastd_peer_t *peer, fastd_metho if (common_nonce[COMMON_NONCEBYTES]) /* flags */ return false; - uint8_t nonce[session->cipher->iv_length]; - if (session->cipher->iv_length) { - memset(nonce, 0, session->cipher->iv_length); - memcpy(nonce, common_nonce, min_size_t(COMMON_NONCEBYTES, session->cipher->iv_length)); - nonce[session->cipher->iv_length-1] = 1; + uint8_t nonce[session->cipher_info->iv_length]; + if (session->cipher_info->iv_length) { + memset(nonce, 0, session->cipher_info->iv_length); + memcpy(nonce, common_nonce, min_size_t(COMMON_NONCEBYTES, session->cipher_info->iv_length)); + nonce[session->cipher_info->iv_length-1] = 1; } int64_t age; -- cgit v1.2.3