1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Cryptographic API.
4 *
5 * s390 implementation of the SHA1 Secure Hash Algorithm.
6 *
7 * Derived from cryptoapi implementation, adapted for in-place
8 * scatterlist interface. Originally based on the public domain
9 * implementation written by Steve Reid.
10 *
11 * s390 Version:
12 * Copyright IBM Corp. 2003, 2007
13 * Author(s): Thomas Spatzier
14 * Jan Glauber (jan.glauber@de.ibm.com)
15 *
16 * Derived from "crypto/sha1_generic.c"
17 * Copyright (c) Alan Smithee.
18 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
19 * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
20 */
21 #include <crypto/internal/hash.h>
22 #include <linux/init.h>
23 #include <linux/module.h>
24 #include <linux/cpufeature.h>
25 #include <crypto/sha1.h>
26 #include <asm/cpacf.h>
27
28 #include "sha.h"
29
30 static int s390_sha1_init(struct shash_desc *desc)
31 {
32 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
33
34 sctx->state[0] = SHA1_H0;
35 sctx->state[1] = SHA1_H1;
36 sctx->state[2] = SHA1_H2;
37 sctx->state[3] = SHA1_H3;
38 sctx->state[4] = SHA1_H4;
39 sctx->count = 0;
40 sctx->func = CPACF_KIMD_SHA_1;
41
42 return 0;
43 }
44
45 static int s390_sha1_export(struct shash_desc *desc, void *out)
46 {
47 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
48 struct sha1_state *octx = out;
49
50 octx->count = sctx->count;
51 memcpy(octx->state, sctx->state, sizeof(octx->state));
52 memcpy(octx->buffer, sctx->buf, sizeof(octx->buffer));
53 return 0;
54 }
55
56 static int s390_sha1_import(struct shash_desc *desc, const void *in)
57 {
58 struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
59 const struct sha1_state *ictx = in;
60
61 sctx->count = ictx->count;
62 memcpy(sctx->state, ictx->state, sizeof(ictx->state));
63 memcpy(sctx->buf, ictx->buffer, sizeof(ictx->buffer));
64 sctx->func = CPACF_KIMD_SHA_1;
65 return 0;
66 }
67
68 static struct shash_alg alg = {
69 .digestsize = SHA1_DIGEST_SIZE,
70 .init = s390_sha1_init,
71 .update = s390_sha_update,
72 .final = s390_sha_final,
73 .export = s390_sha1_export,
74 .import = s390_sha1_import,
75 .descsize = sizeof(struct s390_sha_ctx),
76 .statesize = sizeof(struct sha1_state),
77 .base = {
78 .cra_name = "sha1",
79 .cra_driver_name= "sha1-s390",
80 .cra_priority = 300,
81 .cra_blocksize = SHA1_BLOCK_SIZE,
82 .cra_module = THIS_MODULE,
83 }
84 };
85
86 static int __init sha1_s390_init(void)
87 {
88 if (!cpacf_query_func(CPACF_KIMD, CPACF_KIMD_SHA_1))
89 return -ENODEV;
90 return crypto_register_shash(&alg);
91 }
92
93 static void __exit sha1_s390_fini(void)
94 {
95 crypto_unregister_shash(&alg);
96 }
97
98 module_cpu_feature_match(S390_CPU_FEATURE_MSA, sha1_s390_init);
99 module_exit(sha1_s390_fini);
100
101 MODULE_ALIAS_CRYPTO("sha1");
102 MODULE_LICENSE("GPL");
103 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
104
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