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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/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");
148 

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