| /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
| * |
| * LibTomCrypt is a library that provides various cryptographic |
| * algorithms in a highly modular and flexible manner. |
| * |
| * The library is free for all purposes without any express |
| * guarantee it works. |
| * |
| * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.org |
| */ |
| #include "tomcrypt.h" |
| |
| /** |
| @file crypt_find_cipher_any.c |
| Find a cipher in the descriptor tables, Tom St Denis |
| */ |
| |
| /** |
| Find a cipher flexibly. First by name then if not present by block and key size |
| @param name The name of the cipher desired |
| @param blocklen The minimum length of the block cipher desired (octets) |
| @param keylen The minimum length of the key size desired (octets) |
| @return >= 0 if found, -1 if not present |
| */ |
| int find_cipher_any(const char *name, int blocklen, int keylen) |
| { |
| int x; |
| |
| LTC_ARGCHK(name != NULL); |
| |
| x = find_cipher(name); |
| if (x != -1) return x; |
| |
| for (x = 0; x < TAB_SIZE; x++) { |
| if (cipher_descriptor[x].name == NULL) { |
| continue; |
| } |
| if (blocklen <= (int)cipher_descriptor[x].block_length && keylen <= (int)cipher_descriptor[x].max_key_length) { |
| return x; |
| } |
| } |
| return -1; |
| } |