1 // SPDX-License-Identifier: GPL-2.0+
5 * s390 implementation of the SHA512 and SHA384 Secure Hash Algorithm.
7 * Copyright IBM Corp. 2019
8 * Author(s): Joerg Schmidbauer (jschmidb@de.ibm.com)
10 #include <crypto/internal/hash.h>
11 #include <linux/init.h>
12 #include <linux/module.h>
13 #include <linux/cpufeature.h>
14 #include <crypto/sha.h>
15 #include <crypto/sha3.h>
16 #include <asm/cpacf.h>
20 static int sha3_512_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_512;
31 static int sha3_512_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 octx->rsizw = sctx->count >> 32;
39 memcpy(octx->st, sctx->state, sizeof(octx->st));
40 memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
45 static int sha3_512_import(struct shash_desc *desc, const void *in)
47 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
48 const struct sha3_state *ictx = in;
50 if (unlikely(ictx->rsizw))
52 sctx->count = ictx->rsiz;
54 memcpy(sctx->state, ictx->st, sizeof(ictx->st));
55 memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
56 sctx->func = CPACF_KIMD_SHA3_512;
61 static int sha3_384_import(struct shash_desc *desc, const void *in)
63 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
64 const struct sha3_state *ictx = in;
66 if (unlikely(ictx->rsizw))
68 sctx->count = ictx->rsiz;
70 memcpy(sctx->state, ictx->st, sizeof(ictx->st));
71 memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
72 sctx->func = CPACF_KIMD_SHA3_384;
77 static struct shash_alg sha3_512_alg = {
78 .digestsize = SHA3_512_DIGEST_SIZE,
79 .init = sha3_512_init,
80 .update = s390_sha_update,
81 .final = s390_sha_final,
82 .export = sha3_512_export,
83 .import = sha3_512_import,
84 .descsize = sizeof(struct s390_sha_ctx),
85 .statesize = sizeof(struct sha3_state),
87 .cra_name = "sha3-512",
88 .cra_driver_name = "sha3-512-s390",
90 .cra_blocksize = SHA3_512_BLOCK_SIZE,
91 .cra_module = THIS_MODULE,
95 MODULE_ALIAS_CRYPTO("sha3-512");
97 static int sha3_384_init(struct shash_desc *desc)
99 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
101 memset(sctx->state, 0, sizeof(sctx->state));
103 sctx->func = CPACF_KIMD_SHA3_384;
108 static struct shash_alg sha3_384_alg = {
109 .digestsize = SHA3_384_DIGEST_SIZE,
110 .init = sha3_384_init,
111 .update = s390_sha_update,
112 .final = s390_sha_final,
113 .export = sha3_512_export, /* same as for 512 */
114 .import = sha3_384_import, /* function code different! */
115 .descsize = sizeof(struct s390_sha_ctx),
116 .statesize = sizeof(struct sha3_state),
118 .cra_name = "sha3-384",
119 .cra_driver_name = "sha3-384-s390",
121 .cra_blocksize = SHA3_384_BLOCK_SIZE,
122 .cra_ctxsize = sizeof(struct s390_sha_ctx),
123 .cra_module = THIS_MODULE,
127 MODULE_ALIAS_CRYPTO("sha3-384");
129 static int __init init(void)
133 if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA3_512))
135 ret = crypto_register_shash(&sha3_512_alg);
138 ret = crypto_register_shash(&sha3_384_alg);
140 crypto_unregister_shash(&sha3_512_alg);
145 static void __exit fini(void)
147 crypto_unregister_shash(&sha3_512_alg);
148 crypto_unregister_shash(&sha3_384_alg);
151 module_cpu_feature_match(MSA, init);
154 MODULE_LICENSE("GPL");
155 MODULE_DESCRIPTION("SHA3-512 and SHA3-384 Secure Hash Algorithm");