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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sha512_s390.c (3705B)

      1// SPDX-License-Identifier: GPL-2.0+
      2/*
      3 * Cryptographic API.
      4 *
      5 * s390 implementation of the SHA512 and SHA38 Secure Hash Algorithm.
      6 *
      7 * Copyright IBM Corp. 2007
      8 * Author(s): Jan Glauber (jang@de.ibm.com)
      9 */
     10#include <crypto/internal/hash.h>
     11#include <crypto/sha2.h>
     12#include <linux/errno.h>
     13#include <linux/init.h>
     14#include <linux/kernel.h>
     15#include <linux/module.h>
     16#include <linux/cpufeature.h>
     17#include <asm/cpacf.h>
     18
     19#include "sha.h"
     20
     21static int sha512_init(struct shash_desc *desc)
     22{
     23	struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
     24
     25	*(__u64 *)&ctx->state[0] = SHA512_H0;
     26	*(__u64 *)&ctx->state[2] = SHA512_H1;
     27	*(__u64 *)&ctx->state[4] = SHA512_H2;
     28	*(__u64 *)&ctx->state[6] = SHA512_H3;
     29	*(__u64 *)&ctx->state[8] = SHA512_H4;
     30	*(__u64 *)&ctx->state[10] = SHA512_H5;
     31	*(__u64 *)&ctx->state[12] = SHA512_H6;
     32	*(__u64 *)&ctx->state[14] = SHA512_H7;
     33	ctx->count = 0;
     34	ctx->func = CPACF_KIMD_SHA_512;
     35
     36	return 0;
     37}
     38
     39static int sha512_export(struct shash_desc *desc, void *out)
     40{
     41	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
     42	struct sha512_state *octx = out;
     43
     44	octx->count[0] = sctx->count;
     45	octx->count[1] = 0;
     46	memcpy(octx->state, sctx->state, sizeof(octx->state));
     47	memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
     48	return 0;
     49}
     50
     51static int sha512_import(struct shash_desc *desc, const void *in)
     52{
     53	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
     54	const struct sha512_state *ictx = in;
     55
     56	if (unlikely(ictx->count[1]))
     57		return -ERANGE;
     58	sctx->count = ictx->count[0];
     59
     60	memcpy(sctx->state, ictx->state, sizeof(ictx->state));
     61	memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
     62	sctx->func = CPACF_KIMD_SHA_512;
     63	return 0;
     64}
     65
     66static struct shash_alg sha512_alg = {
     67	.digestsize	=	SHA512_DIGEST_SIZE,
     68	.init		=	sha512_init,
     69	.update		=	s390_sha_update,
     70	.final		=	s390_sha_final,
     71	.export		=	sha512_export,
     72	.import		=	sha512_import,
     73	.descsize	=	sizeof(struct s390_sha_ctx),
     74	.statesize	=	sizeof(struct sha512_state),
     75	.base		=	{
     76		.cra_name	=	"sha512",
     77		.cra_driver_name=	"sha512-s390",
     78		.cra_priority	=	300,
     79		.cra_blocksize	=	SHA512_BLOCK_SIZE,
     80		.cra_module	=	THIS_MODULE,
     81	}
     82};
     83
     84MODULE_ALIAS_CRYPTO("sha512");
     85
     86static int sha384_init(struct shash_desc *desc)
     87{
     88	struct s390_sha_ctx *ctx = shash_desc_ctx(desc);
     89
     90	*(__u64 *)&ctx->state[0] = SHA384_H0;
     91	*(__u64 *)&ctx->state[2] = SHA384_H1;
     92	*(__u64 *)&ctx->state[4] = SHA384_H2;
     93	*(__u64 *)&ctx->state[6] = SHA384_H3;
     94	*(__u64 *)&ctx->state[8] = SHA384_H4;
     95	*(__u64 *)&ctx->state[10] = SHA384_H5;
     96	*(__u64 *)&ctx->state[12] = SHA384_H6;
     97	*(__u64 *)&ctx->state[14] = SHA384_H7;
     98	ctx->count = 0;
     99	ctx->func = CPACF_KIMD_SHA_512;
    100
    101	return 0;
    102}
    103
    104static struct shash_alg sha384_alg = {
    105	.digestsize	=	SHA384_DIGEST_SIZE,
    106	.init		=	sha384_init,
    107	.update		=	s390_sha_update,
    108	.final		=	s390_sha_final,
    109	.export		=	sha512_export,
    110	.import		=	sha512_import,
    111	.descsize	=	sizeof(struct s390_sha_ctx),
    112	.statesize	=	sizeof(struct sha512_state),
    113	.base		=	{
    114		.cra_name	=	"sha384",
    115		.cra_driver_name=	"sha384-s390",
    116		.cra_priority	=	300,
    117		.cra_blocksize	=	SHA384_BLOCK_SIZE,
    118		.cra_ctxsize	=	sizeof(struct s390_sha_ctx),
    119		.cra_module	=	THIS_MODULE,
    120	}
    121};
    122
    123MODULE_ALIAS_CRYPTO("sha384");
    124
    125static int __init init(void)
    126{
    127	int ret;
    128
    129	if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_512))
    130		return -ENODEV;
    131	if ((ret = crypto_register_shash(&sha512_alg)) < 0)
    132		goto out;
    133	if ((ret = crypto_register_shash(&sha384_alg)) < 0)
    134		crypto_unregister_shash(&sha512_alg);
    135out:
    136	return ret;
    137}
    138
    139static void __exit fini(void)
    140{
    141	crypto_unregister_shash(&sha512_alg);
    142	crypto_unregister_shash(&sha384_alg);
    143}
    144
    145module_cpu_feature_match(MSA, init);
    146module_exit(fini);
    147
    148MODULE_LICENSE("GPL");
    149MODULE_DESCRIPTION("SHA512 and SHA-384 Secure Hash Algorithm");