cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sha256_s390.c (3472B)

      1// SPDX-License-Identifier: GPL-2.0+
      2/*
      3 * Cryptographic API.
      4 *
      5 * s390 implementation of the SHA256 and SHA224 Secure Hash Algorithm.
      6 *
      7 * s390 Version:
      8 *   Copyright IBM Corp. 2005, 2011
      9 *   Author(s): Jan Glauber (jang@de.ibm.com)
     10 */
     11#include <crypto/internal/hash.h>
     12#include <linux/init.h>
     13#include <linux/module.h>
     14#include <linux/cpufeature.h>
     15#include <crypto/sha2.h>
     16#include <asm/cpacf.h>
     17
     18#include "sha.h"
     19
     20static int s390_sha256_init(struct shash_desc *desc)
     21{
     22	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
     23
     24	sctx->state[0] = SHA256_H0;
     25	sctx->state[1] = SHA256_H1;
     26	sctx->state[2] = SHA256_H2;
     27	sctx->state[3] = SHA256_H3;
     28	sctx->state[4] = SHA256_H4;
     29	sctx->state[5] = SHA256_H5;
     30	sctx->state[6] = SHA256_H6;
     31	sctx->state[7] = SHA256_H7;
     32	sctx->count = 0;
     33	sctx->func = CPACF_KIMD_SHA_256;
     34
     35	return 0;
     36}
     37
     38static int sha256_export(struct shash_desc *desc, void *out)
     39{
     40	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
     41	struct sha256_state *octx = out;
     42
     43	octx->count = sctx->count;
     44	memcpy(octx->state, sctx->state, sizeof(octx->state));
     45	memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
     46	return 0;
     47}
     48
     49static int sha256_import(struct shash_desc *desc, const void *in)
     50{
     51	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
     52	const struct sha256_state *ictx = in;
     53
     54	sctx->count = ictx->count;
     55	memcpy(sctx->state, ictx->state, sizeof(ictx->state));
     56	memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
     57	sctx->func = CPACF_KIMD_SHA_256;
     58	return 0;
     59}
     60
     61static struct shash_alg sha256_alg = {
     62	.digestsize	=	SHA256_DIGEST_SIZE,
     63	.init		=	s390_sha256_init,
     64	.update		=	s390_sha_update,
     65	.final		=	s390_sha_final,
     66	.export		=	sha256_export,
     67	.import		=	sha256_import,
     68	.descsize	=	sizeof(struct s390_sha_ctx),
     69	.statesize	=	sizeof(struct sha256_state),
     70	.base		=	{
     71		.cra_name	=	"sha256",
     72		.cra_driver_name=	"sha256-s390",
     73		.cra_priority	=	300,
     74		.cra_blocksize	=	SHA256_BLOCK_SIZE,
     75		.cra_module	=	THIS_MODULE,
     76	}
     77};
     78
     79static int s390_sha224_init(struct shash_desc *desc)
     80{
     81	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
     82
     83	sctx->state[0] = SHA224_H0;
     84	sctx->state[1] = SHA224_H1;
     85	sctx->state[2] = SHA224_H2;
     86	sctx->state[3] = SHA224_H3;
     87	sctx->state[4] = SHA224_H4;
     88	sctx->state[5] = SHA224_H5;
     89	sctx->state[6] = SHA224_H6;
     90	sctx->state[7] = SHA224_H7;
     91	sctx->count = 0;
     92	sctx->func = CPACF_KIMD_SHA_256;
     93
     94	return 0;
     95}
     96
     97static struct shash_alg sha224_alg = {
     98	.digestsize	=	SHA224_DIGEST_SIZE,
     99	.init		=	s390_sha224_init,
    100	.update		=	s390_sha_update,
    101	.final		=	s390_sha_final,
    102	.export		=	sha256_export,
    103	.import		=	sha256_import,
    104	.descsize	=	sizeof(struct s390_sha_ctx),
    105	.statesize	=	sizeof(struct sha256_state),
    106	.base		=	{
    107		.cra_name	=	"sha224",
    108		.cra_driver_name=	"sha224-s390",
    109		.cra_priority	=	300,
    110		.cra_blocksize	=	SHA224_BLOCK_SIZE,
    111		.cra_module	=	THIS_MODULE,
    112	}
    113};
    114
    115static int __init sha256_s390_init(void)
    116{
    117	int ret;
    118
    119	if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_256))
    120		return -ENODEV;
    121	ret = crypto_register_shash(&sha256_alg);
    122	if (ret < 0)
    123		goto out;
    124	ret = crypto_register_shash(&sha224_alg);
    125	if (ret < 0)
    126		crypto_unregister_shash(&sha256_alg);
    127out:
    128	return ret;
    129}
    130
    131static void __exit sha256_s390_fini(void)
    132{
    133	crypto_unregister_shash(&sha224_alg);
    134	crypto_unregister_shash(&sha256_alg);
    135}
    136
    137module_cpu_feature_match(MSA, sha256_s390_init);
    138module_exit(sha256_s390_fini);
    139
    140MODULE_ALIAS_CRYPTO("sha256");
    141MODULE_ALIAS_CRYPTO("sha224");
    142MODULE_LICENSE("GPL");
    143MODULE_DESCRIPTION("SHA256 and SHA224 Secure Hash Algorithm");