arch/s390/crypto/sha3_256_s390.c

   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
  21 static 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
  32 static 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
  44 static 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
  57 static 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
  70 static 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
  88 static 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
  99 static 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
 117 static 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);
 131 out:
 132         return ret;
 133 }
 134
 135 static void __exit sha3_256_s390_fini(void)
 136 {
 137         crypto_unregister_shash(&sha3_224_alg);
 138         crypto_unregister_shash(&sha3_256_alg);
 139 }
 140
 141 module_cpu_feature_match(MSA, sha3_256_s390_init);
 142 module_exit(sha3_256_s390_fini);
 143
 144 MODULE_ALIAS_CRYPTO("sha3-256");
 145 MODULE_ALIAS_CRYPTO("sha3-224");
 146 MODULE_LICENSE("GPL");
 147 MODULE_DESCRIPTION("SHA3-256 and SHA3-224 Secure Hash Algorithm");