LXR linux/arch/s390/crypto/sha3_512

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Cryptographic API.
   4 *
   5 * s390 implementation of the SHA512 and SHA384 Secure Hash Algorithm.
   6 *
   7 * Copyright IBM Corp. 2019
   8 * Author(s): Joerg Schmidbauer (jschmidb@de.ibm.com)
   9 */
  10#include <crypto/internal/hash.h>
  11#include <linux/init.h>
  12#include <linux/module.h>
  13#include <linux/cpufeature.h>
  14#include <crypto/sha3.h>
  15#include <asm/cpacf.h>
  16
  17#include "sha.h"
  18
  19static int sha3_512_init(struct shash_desc *desc)
  20{
  21        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  22
  23        memset(sctx->state, 0, sizeof(sctx->state));
  24        sctx->count = 0;
  25        sctx->func = CPACF_KIMD_SHA3_512;
  26
  27        return 0;
  28}
  29
  30static int sha3_512_export(struct shash_desc *desc, void *out)
  31{
  32        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  33        struct sha3_state *octx = out;
  34
  35        octx->rsiz = sctx->count;
  36        octx->rsizw = sctx->count >> 32;
  37
  38        memcpy(octx->st, sctx->state, sizeof(octx->st));
  39        memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
  40
  41        return 0;
  42}
  43
  44static int sha3_512_import(struct shash_desc *desc, const void *in)
  45{
  46        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  47        const struct sha3_state *ictx = in;
  48
  49        if (unlikely(ictx->rsizw))
  50                return -ERANGE;
  51        sctx->count = ictx->rsiz;
  52
  53        memcpy(sctx->state, ictx->st, sizeof(ictx->st));
  54        memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
  55        sctx->func = CPACF_KIMD_SHA3_512;
  56
  57        return 0;
  58}
  59
  60static int sha3_384_import(struct shash_desc *desc, const void *in)
  61{
  62        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  63        const struct sha3_state *ictx = in;
  64
  65        if (unlikely(ictx->rsizw))
  66                return -ERANGE;
  67        sctx->count = ictx->rsiz;
  68
  69        memcpy(sctx->state, ictx->st, sizeof(ictx->st));
  70        memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
  71        sctx->func = CPACF_KIMD_SHA3_384;
  72
  73        return 0;
  74}
  75
  76static struct shash_alg sha3_512_alg = {
  77        .digestsize     =       SHA3_512_DIGEST_SIZE,
  78        .init           =       sha3_512_init,
  79        .update         =       s390_sha_update,
  80        .final          =       s390_sha_final,
  81        .export         =       sha3_512_export,
  82        .import         =       sha3_512_import,
  83        .descsize       =       sizeof(struct s390_sha_ctx),
  84        .statesize      =       sizeof(struct sha3_state),
  85        .base           =       {
  86                .cra_name        =      "sha3-512",
  87                .cra_driver_name =      "sha3-512-s390",
  88                .cra_priority    =      300,
  89                .cra_blocksize   =      SHA3_512_BLOCK_SIZE,
  90                .cra_module      =      THIS_MODULE,
  91        }
  92};
  93
  94MODULE_ALIAS_CRYPTO("sha3-512");
  95
  96static int sha3_384_init(struct shash_desc *desc)
  97{
  98        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  99
 100        memset(sctx->state, 0, sizeof(sctx->state));
 101        sctx->count = 0;
 102        sctx->func = CPACF_KIMD_SHA3_384;
 103
 104        return 0;
 105}
 106
 107static struct shash_alg sha3_384_alg = {
 108        .digestsize     =       SHA3_384_DIGEST_SIZE,
 109        .init           =       sha3_384_init,
 110        .update         =       s390_sha_update,
 111        .final          =       s390_sha_final,
 112        .export         =       sha3_512_export, /* same as for 512 */
 113        .import         =       sha3_384_import, /* function code different! */
 114        .descsize       =       sizeof(struct s390_sha_ctx),
 115        .statesize      =       sizeof(struct sha3_state),
 116        .base           =       {
 117                .cra_name        =      "sha3-384",
 118                .cra_driver_name =      "sha3-384-s390",
 119                .cra_priority    =      300,
 120                .cra_blocksize   =      SHA3_384_BLOCK_SIZE,
 121                .cra_ctxsize     =      sizeof(struct s390_sha_ctx),
 122                .cra_module      =      THIS_MODULE,
 123        }
 124};
 125
 126MODULE_ALIAS_CRYPTO("sha3-384");
 127
 128static int __init init(void)
 129{
 130        int ret;
 131
 132        if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA3_512))
 133                return -ENODEV;
 134        ret = crypto_register_shash(&sha3_512_alg);
 135        if (ret < 0)
 136                goto out;
 137        ret = crypto_register_shash(&sha3_384_alg);
 138        if (ret < 0)
 139                crypto_unregister_shash(&sha3_512_alg);
 140out:
 141        return ret;
 142}
 143
 144static void __exit fini(void)
 145{
 146        crypto_unregister_shash(&sha3_512_alg);
 147        crypto_unregister_shash(&sha3_384_alg);
 148}
 149
 150module_cpu_feature_match(MSA, init);
 151module_exit(fini);
 152
 153MODULE_LICENSE("GPL");
 154MODULE_DESCRIPTION("SHA3-512 and SHA3-384 Secure Hash Algorithm");
 155