1 // SPDX-License-Identifier: GPL-2.0+
5 * s390 implementation of the SHA256 and SHA224 Secure Hash Algorithm.
8 * Copyright IBM Corp. 2019
9 * Author(s): Joerg Schmidbauer (jschmidb@de.ibm.com)
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>
20 static int sha3_256_init(struct shash_desc *desc)
22 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
24 memset(sctx->state, 0, sizeof(sctx->state));
26 sctx->func = CPACF_KIMD_SHA3_256;
31 static int sha3_256_export(struct shash_desc *desc, void *out)
33 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
34 struct sha3_state *octx = out;
36 octx->rsiz = sctx->count;
37 memcpy(octx->st, sctx->state, sizeof(octx->st));
38 memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
43 static int sha3_256_import(struct shash_desc *desc, const void *in)
45 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
46 const struct sha3_state *ictx = in;
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;
56 static int sha3_224_import(struct shash_desc *desc, const void *in)
58 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
59 const struct sha3_state *ictx = in;
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;
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),
79 .cra_name = "sha3-256",
80 .cra_driver_name = "sha3-256-s390",
82 .cra_blocksize = SHA3_256_BLOCK_SIZE,
83 .cra_module = THIS_MODULE,
87 static int sha3_224_init(struct shash_desc *desc)
89 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
91 memset(sctx->state, 0, sizeof(sctx->state));
93 sctx->func = CPACF_KIMD_SHA3_224;
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),
108 .cra_name = "sha3-224",
109 .cra_driver_name = "sha3-224-s390",
111 .cra_blocksize = SHA3_224_BLOCK_SIZE,
112 .cra_module = THIS_MODULE,
116 static int __init sha3_256_s390_init(void)
120 if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA3_256))
123 ret = crypto_register_shash(&sha3_256_alg);
127 ret = crypto_register_shash(&sha3_224_alg);
129 crypto_unregister_shash(&sha3_256_alg);
134 static void __exit sha3_256_s390_fini(void)
136 crypto_unregister_shash(&sha3_224_alg);
137 crypto_unregister_shash(&sha3_256_alg);
140 module_cpu_feature_match(S390_CPU_FEATURE_MSA, sha3_256_s390_init);
141 module_exit(sha3_256_s390_fini);
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");