hash_memory_multi.c [plain text]
#include "tomcrypt.h"
#include <stdarg.h>
int hash_memory_multi(int hash, unsigned char *out, unsigned long *outlen,
const unsigned char *in, unsigned long inlen, ...)
{
hash_state *md;
int err;
va_list args;
const unsigned char *curptr;
unsigned long curlen;
LTC_ARGCHK(in != NULL);
LTC_ARGCHK(out != NULL);
LTC_ARGCHK(outlen != NULL);
if ((err = hash_is_valid(hash)) != CRYPT_OK) {
return err;
}
if (*outlen < hash_descriptor[hash].hashsize) {
*outlen = hash_descriptor[hash].hashsize;
return CRYPT_BUFFER_OVERFLOW;
}
md = XMALLOC(sizeof(hash_state));
if (md == NULL) {
return CRYPT_MEM;
}
if ((err = hash_descriptor[hash].init(md)) != CRYPT_OK) {
goto LBL_ERR;
}
va_start(args, inlen);
curptr = in;
curlen = inlen;
for (;;) {
if ((err = hash_descriptor[hash].process(md, curptr, curlen)) != CRYPT_OK) {
goto LBL_ERR;
}
curptr = va_arg(args, const unsigned char*);
if (curptr == NULL) {
break;
}
curlen = va_arg(args, unsigned long);
}
err = hash_descriptor[hash].done(md, out);
*outlen = hash_descriptor[hash].hashsize;
LBL_ERR:
#ifdef LTC_CLEAN_STACK
zeromem(md, sizeof(hash_state));
#endif
XFREE(md);
va_end(args);
return err;
}