arch/s390/crypto/sha3_512_s390.c

   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
  19 static 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
  30 static 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
  44 static 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
  60 static 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
  76 static 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
  94 MODULE_ALIAS_CRYPTO("sha3-512");
  95
  96 static 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
 107 static 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
 126 MODULE_ALIAS_CRYPTO("sha3-384");
 127
 128 static 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);
 140 out:
 141         return ret;
 142 }
 143
 144 static void __exit fini(void)
 145 {
 146         crypto_unregister_shash(&sha3_512_alg);
 147         crypto_unregister_shash(&sha3_384_alg);
 148 }
 149
 150 module_cpu_feature_match(MSA, init);
 151 module_exit(fini);
 152
 153 MODULE_LICENSE("GPL");
 154 MODULE_DESCRIPTION("SHA3-512 and SHA3-384 Secure Hash Algorithm");