1/*
2 * Cryptographic Hash operations.
3 *
4 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the Free
8 * Software Foundation; either version 2 of the License, or (at your option)
9 * any later version.
10 */
11
12#include <linux/errno.h>
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/seq_file.h>
16
17#include "internal.h"
18
19static unsigned int crypto_hash_ctxsize(struct crypto_alg *alg, u32 type,
20					u32 mask)
21{
22	return alg->cra_ctxsize;
23}
24
25static int crypto_init_hash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
26{
27	struct hash_tfm *crt = &tfm->crt_hash;
28	struct hash_alg *alg = &tfm->__crt_alg->cra_hash;
29
30	if (alg->digestsize > crypto_tfm_alg_blocksize(tfm))
31		return -EINVAL;
32
33	crt->init = alg->init;
34	crt->update = alg->update;
35	crt->final = alg->final;
36	crt->digest = alg->digest;
37	crt->setkey = alg->setkey;
38	crt->digestsize = alg->digestsize;
39
40	return 0;
41}
42
43static void crypto_hash_show(struct seq_file *m, struct crypto_alg *alg)
44	__attribute__ ((unused));
45static void crypto_hash_show(struct seq_file *m, struct crypto_alg *alg)
46{
47	seq_printf(m, "type         : hash\n");
48	seq_printf(m, "blocksize    : %u\n", alg->cra_blocksize);
49	seq_printf(m, "digestsize   : %u\n", alg->cra_hash.digestsize);
50}
51
52const struct crypto_type crypto_hash_type = {
53	.ctxsize = crypto_hash_ctxsize,
54	.init = crypto_init_hash_ops,
55#ifdef CONFIG_PROC_FS
56	.show = crypto_hash_show,
57#endif
58};
59EXPORT_SYMBOL_GPL(crypto_hash_type);
60
61MODULE_LICENSE("GPL");
62MODULE_DESCRIPTION("Generic cryptographic hash type");
63