#include <tomcrypt.h>
#ifdef LTC_PKCS_5
int pkcs_5_alg1(const unsigned char *password, unsigned long password_len,
const unsigned char *salt,
int iteration_count, int hash_idx,
unsigned char *out, unsigned long *outlen)
{
int err;
unsigned long x;
hash_state *md;
unsigned char *buf;
LTC_ARGCHK(password != NULL);
LTC_ARGCHK(salt != NULL);
LTC_ARGCHK(out != NULL);
LTC_ARGCHK(outlen != NULL);
if ((err = hash_is_valid(hash_idx)) != CRYPT_OK) {
return err;
}
md = XMALLOC(sizeof(hash_state));
buf = XMALLOC(MAXBLOCKSIZE);
if (md == NULL || buf == NULL) {
if (md != NULL) {
XFREE(md);
}
if (buf != NULL) {
XFREE(buf);
}
return CRYPT_MEM;
}
if ((err = hash_descriptor[hash_idx].init(md)) != CRYPT_OK) {
goto LBL_ERR;
}
if ((err = hash_descriptor[hash_idx].process(md, password, password_len)) != CRYPT_OK) {
goto LBL_ERR;
}
if ((err = hash_descriptor[hash_idx].process(md, salt, 8)) != CRYPT_OK) {
goto LBL_ERR;
}
if ((err = hash_descriptor[hash_idx].done(md, buf)) != CRYPT_OK) {
goto LBL_ERR;
}
while (--iteration_count) {
x = MAXBLOCKSIZE;
if ((err = hash_memory(hash_idx, buf, hash_descriptor[hash_idx].hashsize, buf, &x)) != CRYPT_OK) {
goto LBL_ERR;
}
}
for (x = 0; x < hash_descriptor[hash_idx].hashsize && x < *outlen; x++) {
out[x] = buf[x];
}
*outlen = x;
err = CRYPT_OK;
LBL_ERR:
#ifdef LTC_CLEAN_STACK
zeromem(buf, MAXBLOCKSIZE);
zeromem(md, sizeof(hash_state));
#endif
XFREE(buf);
XFREE(md);
return err;
}
#endif