/* 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@iahu.ca, http://libtomcrypt.org */#include "mycrypt.h"int hash_memory(int hash, const unsigned char *data, unsigned long len, unsigned char *dst, unsigned long *outlen){    hash_state md;    int err;    _ARGCHK(data   != NULL);    _ARGCHK(dst    != NULL);    _ARGCHK(outlen != NULL);    if ((err = hash_is_valid(hash)) != CRYPT_OK) {        return err;    }    if (*outlen < hash_descriptor[hash].hashsize) {       return CRYPT_BUFFER_OVERFLOW;    }    *outlen = hash_descriptor[hash].hashsize;    hash_descriptor[hash].init(&md);    hash_descriptor[hash].process(&md, data, len);    hash_descriptor[hash].done(&md, dst);    return CRYPT_OK;}