LXR linux/arch/s390/crypto/sha256

   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");
 144