diff options
Diffstat (limited to 'src/methods/generic_poly1305')
| -rw-r--r-- | src/methods/generic_poly1305/generic_poly1305.c | 33 |
1 files changed, 15 insertions, 18 deletions
diff --git a/src/methods/generic_poly1305/generic_poly1305.c b/src/methods/generic_poly1305/generic_poly1305.c index 3820907..80ced8c 100644 --- a/src/methods/generic_poly1305/generic_poly1305.c +++ b/src/methods/generic_poly1305/generic_poly1305.c @@ -43,7 +43,7 @@ struct fastd_method_session_state { }; -static bool cipher_get(fastd_context_t *ctx, const char *name, const fastd_cipher_info_t **cipher_info, 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 **cipher_info, const fastd_cipher_t **cipher, const fastd_cipher_context_t **cctx, bool check) { size_t len = strlen(name); if (len < 9) @@ -56,31 +56,28 @@ static bool cipher_get(fastd_context_t *ctx, const char *name, const fastd_ciphe memcpy(cipher_name, name, len-9); cipher_name[len-9] = 0; - const fastd_cipher_info_t *info = NULL; - - if (ctx) { - *cipher = fastd_cipher_get_by_name(ctx, cipher_name, &info, cctx); - if (!*cipher) - return false; - } - else { - info = fastd_cipher_info_get_by_name(cipher_name); - if (!info) - return false; - } - - if (info->iv_length <= COMMON_NONCEBYTES) + if (check && !fastd_cipher_is_available(cipher_name)) return false; - if (cipher_info) - *cipher_info = info; + if (ctx) + *cipher = fastd_cipher_get_by_name(ctx, cipher_name, cipher_info, cctx); + else if (cipher_info) + *cipher_info = fastd_cipher_info_get_by_name(cipher_name); return true; } static bool method_provides(const char *name) { - return cipher_get(NULL, name, NULL, NULL, NULL); + const fastd_cipher_info_t *cipher_info; + + if (!cipher_get(NULL, name, &cipher_info, NULL, NULL, true)) + return false; + + if (cipher_info->iv_length <= COMMON_NONCEBYTES) + return false; + + return true; } static size_t method_key_length(fastd_context_t *ctx, const char *name) { |