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Linux/arch/s390/crypto/sha3_256_s390.c

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  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/sha3.h>
 16 #include <asm/cpacf.h>
 17 
 18 #include "sha.h"
 19 
 20 static int sha3_256_init(struct shash_desc *desc)
 21 {
 22         struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
 23 
 24         memset(sctx->state, 0, sizeof(sctx->state));
 25         sctx->count = 0;
 26         sctx->func = CPACF_KIMD_SHA3_256;
 27 
 28         return 0;
 29 }
 30 
 31 static int sha3_256_export(struct shash_desc *desc, void *out)
 32 {
 33         struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
 34         struct sha3_state *octx = out;
 35 
 36         octx->rsiz = sctx->count;
 37         memcpy(octx->st, sctx->state, sizeof(octx->st));
 38         memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
 39 
 40         return 0;
 41 }
 42 
 43 static int sha3_256_import(struct shash_desc *desc, const void *in)
 44 {
 45         struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
 46         const struct sha3_state *ictx = in;
 47 
 48         sctx->count = ictx->rsiz;
 49         memcpy(sctx->state, ictx->st, sizeof(ictx->st));
 50         memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
 51         sctx->func = CPACF_KIMD_SHA3_256;
 52 
 53         return 0;
 54 }
 55 
 56 static int sha3_224_import(struct shash_desc *desc, const void *in)
 57 {
 58         struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
 59         const struct sha3_state *ictx = in;
 60 
 61         sctx->count = ictx->rsiz;
 62         memcpy(sctx->state, ictx->st, sizeof(ictx->st));
 63         memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
 64         sctx->func = CPACF_KIMD_SHA3_224;
 65 
 66         return 0;
 67 }
 68 
 69 static struct shash_alg sha3_256_alg = {
 70         .digestsize     =       SHA3_256_DIGEST_SIZE,      /* = 32 */
 71         .init           =       sha3_256_init,
 72         .update         =       s390_sha_update,
 73         .final          =       s390_sha_final,
 74         .export         =       sha3_256_export,
 75         .import         =       sha3_256_import,
 76         .descsize       =       sizeof(struct s390_sha_ctx),
 77         .statesize      =       sizeof(struct sha3_state),
 78         .base           =       {
 79                 .cra_name        =      "sha3-256",
 80                 .cra_driver_name =      "sha3-256-s390",
 81                 .cra_priority    =      300,
 82                 .cra_blocksize   =      SHA3_256_BLOCK_SIZE,
 83                 .cra_module      =      THIS_MODULE,
 84         }
 85 };
 86 
 87 static int sha3_224_init(struct shash_desc *desc)
 88 {
 89         struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
 90 
 91         memset(sctx->state, 0, sizeof(sctx->state));
 92         sctx->count = 0;
 93         sctx->func = CPACF_KIMD_SHA3_224;
 94 
 95         return 0;
 96 }
 97 
 98 static struct shash_alg sha3_224_alg = {
 99         .digestsize     =       SHA3_224_DIGEST_SIZE,
100         .init           =       sha3_224_init,
101         .update         =       s390_sha_update,
102         .final          =       s390_sha_final,
103         .export         =       sha3_256_export, /* same as for 256 */
104         .import         =       sha3_224_import, /* function code different! */
105         .descsize       =       sizeof(struct s390_sha_ctx),
106         .statesize      =       sizeof(struct sha3_state),
107         .base           =       {
108                 .cra_name        =      "sha3-224",
109                 .cra_driver_name =      "sha3-224-s390",
110                 .cra_priority    =      300,
111                 .cra_blocksize   =      SHA3_224_BLOCK_SIZE,
112                 .cra_module      =      THIS_MODULE,
113         }
114 };
115 
116 static int __init sha3_256_s390_init(void)
117 {
118         int ret;
119 
120         if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA3_256))
121                 return -ENODEV;
122 
123         ret = crypto_register_shash(&sha3_256_alg);
124         if (ret < 0)
125                 goto out;
126 
127         ret = crypto_register_shash(&sha3_224_alg);
128         if (ret < 0)
129                 crypto_unregister_shash(&sha3_256_alg);
130 out:
131         return ret;
132 }
133 
134 static void __exit sha3_256_s390_fini(void)
135 {
136         crypto_unregister_shash(&sha3_224_alg);
137         crypto_unregister_shash(&sha3_256_alg);
138 }
139 
140 module_cpu_feature_match(S390_CPU_FEATURE_MSA, sha3_256_s390_init);
141 module_exit(sha3_256_s390_fini);
142 
143 MODULE_ALIAS_CRYPTO("sha3-256");
144 MODULE_ALIAS_CRYPTO("sha3-224");
145 MODULE_LICENSE("GPL");
146 MODULE_DESCRIPTION("SHA3-256 and SHA3-224 Secure Hash Algorithm");
147 

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