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Sourcecode: libtomcrypt version File versions  Download package

int find_cipher_any ( const char *  name,
int  blocklen,
int  keylen 
)

Find a cipher flexibly. First by name then if not present by block and key size

Parameters:
name The name of the cipher desired
blocklen The minimum length of the block cipher desired (octets)
keylen The minimum length of the key size desired (octets)
Returns:
>= 0 if found, -1 if not present

Definition at line 25 of file crypt_find_cipher_any.c.

References ltc_cipher_descriptor::block_length, find_cipher(), and ltc_cipher_descriptor::max_key_length.

{
   int x;

   LTC_ARGCHK(name != NULL);

   x = find_cipher(name);
   if (x != -1) return x;

   LTC_MUTEX_LOCK(&ltc_cipher_mutex);
   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) {
          LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
          return x;
       }
   }
   LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
   return -1;
}


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