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/*
* Copyright 2018-2020 Gentoo Foundation
* Distributed under the terms of the GNU General Public License v2
*
* Copyright 2018- Fabian Groffen - <grobian@gentoo.org>
*/
#ifndef _HASH_H
#define _HASH_H 1
/* for AT_FDCWD */
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
enum hash_impls {
HASH_MD5 = 1<<0,
HASH_SHA1 = 1<<1,
HASH_SHA256 = 1<<2,
HASH_SHA512 = 1<<3,
HASH_WHIRLPOOL = 1<<4,
HASH_BLAKE2B = 1<<5
};
/* default changed from sha256, sha512, whirlpool
* to blake2b, sha512 on 2017-11-21 */
#define HASH_DEFAULT (HASH_BLAKE2B | HASH_SHA512);
/* pass in a fd and get back a fd; filename is for display only */
typedef int (*hash_cb_t) (int, const char *);
void hash_hex(char *out, const unsigned char *buf, const int length);
void hash_multiple_file_fd(
int fd, char *md5, char *sha1, char *sha256, char *sha512,
char *whrlpl, char *blak2b, size_t *flen, int hashes);
void hash_multiple_file_at_cb(
int pfd, const char *fname, hash_cb_t cb, char *md5,
char *sha1, char *sha256, char *sha512, char *whrlpl,
char *blak2b, size_t *flen, int hashes);
#define hash_multiple_file(f, m, s1, s2, s5, w, b, l, h) \
hash_multiple_file_at_cb(AT_FDCWD, f, NULL, m, s1, s2, s5, w, b, l, h)
#define hash_compute_file(f, s2, s5, w, b, l, h) \
hash_multiple_file_at_cb(AT_FDCWD, f, NULL, NULL, NULL, s2, s5, w, b, l, h)
char *hash_file_at_cb(int pfd, const char *filename, int hash_algo, hash_cb_t cb);
#define hash_file(f, h) hash_file_at_cb(AT_FDCWD, f, h, NULL)
#define hash_file_at(fd, f, h) hash_file_at_cb(fd, f, h, NULL)
#endif
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