LXR linux/arch/s390/crypto/sha3_256

   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. 2019
   9 *   Author(s): Joerg Schmidbauer (jschmidb@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/sha.h>
  16#include <crypto/sha3.h>
  17#include <asm/cpacf.h>
  18
  19#include "sha.h"
  20
  21static int sha3_256_init(struct shash_desc *desc)
  22{
  23        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  24
  25        memset(sctx->state, 0, sizeof(sctx->state));
  26        sctx->count = 0;
  27        sctx->func = CPACF_KIMD_SHA3_256;
  28
  29        return 0;
  30}
  31
  32static int sha3_256_export(struct shash_desc *desc, void *out)
  33{
  34        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  35        struct sha3_state *octx = out;
  36
  37        octx->rsiz = sctx->count;
  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_256_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        sctx->count = ictx->rsiz;
  50        memcpy(sctx->state, ictx->st, sizeof(ictx->st));
  51        memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
  52        sctx->func = CPACF_KIMD_SHA3_256;
  53
  54        return 0;
  55}
  56
  57static int sha3_224_import(struct shash_desc *desc, const void *in)
  58{
  59        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  60        const struct sha3_state *ictx = in;
  61
  62        sctx->count = ictx->rsiz;
  63        memcpy(sctx->state, ictx->st, sizeof(ictx->st));
  64        memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
  65        sctx->func = CPACF_KIMD_SHA3_224;
  66
  67        return 0;
  68}
  69
  70static struct shash_alg sha3_256_alg = {
  71        .digestsize     =       SHA3_256_DIGEST_SIZE,      /* = 32 */
  72        .init           =       sha3_256_init,
  73        .update         =       s390_sha_update,
  74        .final          =       s390_sha_final,
  75        .export         =       sha3_256_export,
  76        .import         =       sha3_256_import,
  77        .descsize       =       sizeof(struct s390_sha_ctx),
  78        .statesize      =       sizeof(struct sha3_state),
  79        .base           =       {
  80                .cra_name        =      "sha3-256",
  81                .cra_driver_name =      "sha3-256-s390",
  82                .cra_priority    =      300,
  83                .cra_blocksize   =      SHA3_256_BLOCK_SIZE,
  84                .cra_module      =      THIS_MODULE,
  85        }
  86};
  87
  88static int sha3_224_init(struct shash_desc *desc)
  89{
  90        struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
  91
  92        memset(sctx->state, 0, sizeof(sctx->state));
  93        sctx->count = 0;
  94        sctx->func = CPACF_KIMD_SHA3_224;
  95
  96        return 0;
  97}
  98
  99static struct shash_alg sha3_224_alg = {
 100        .digestsize     =       SHA3_224_DIGEST_SIZE,
 101        .init           =       sha3_224_init,
 102        .update         =       s390_sha_update,
 103        .final          =       s390_sha_final,
 104        .export         =       sha3_256_export, /* same as for 256 */
 105        .import         =       sha3_224_import, /* function code different! */
 106        .descsize       =       sizeof(struct s390_sha_ctx),
 107        .statesize      =       sizeof(struct sha3_state),
 108        .base           =       {
 109                .cra_name        =      "sha3-224",
 110                .cra_driver_name =      "sha3-224-s390",
 111                .cra_priority    =      300,
 112                .cra_blocksize   =      SHA3_224_BLOCK_SIZE,
 113                .cra_module      =      THIS_MODULE,
 114        }
 115};
 116
 117static int __init sha3_256_s390_init(void)
 118{
 119        int ret;
 120
 121        if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA3_256))
 122                return -ENODEV;
 123
 124        ret = crypto_register_shash(&sha3_256_alg);
 125        if (ret < 0)
 126                goto out;
 127
 128        ret = crypto_register_shash(&sha3_224_alg);
 129        if (ret < 0)
 130                crypto_unregister_shash(&sha3_256_alg);
 131out:
 132        return ret;
 133}
 134
 135static void __exit sha3_256_s390_fini(void)
 136{
 137        crypto_unregister_shash(&sha3_224_alg);
 138        crypto_unregister_shash(&sha3_256_alg);
 139}
 140
 141module_cpu_feature_match(MSA, sha3_256_s390_init);
 142module_exit(sha3_256_s390_fini);
 143
 144MODULE_ALIAS_CRYPTO("sha3-256");
 145MODULE_ALIAS_CRYPTO("sha3-224");
 146MODULE_LICENSE("GPL");
 147MODULE_DESCRIPTION("SHA3-256 and SHA3-224 Secure Hash Algorithm");
 148