4 * s390 implementation of the SHA1 Secure Hash Algorithm.
6 * Derived from cryptoapi implementation, adapted for in-place
7 * scatterlist interface. Originally based on the public domain
8 * implementation written by Steve Reid.
11 * Copyright IBM Corp. 2003, 2007
12 * Author(s): Thomas Spatzier
13 * Jan Glauber (jan.glauber@de.ibm.com)
15 * Derived from "crypto/sha1_generic.c"
16 * Copyright (c) Alan Smithee.
17 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
18 * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
20 * This program is free software; you can redistribute it and/or modify it
21 * under the terms of the GNU General Public License as published by the Free
22 * Software Foundation; either version 2 of the License, or (at your option)
26 #include <crypto/internal/hash.h>
27 #include <linux/init.h>
28 #include <linux/module.h>
29 #include <linux/cpufeature.h>
30 #include <crypto/sha.h>
31 #include <asm/cpacf.h>
35 static int sha1_init(struct shash_desc
*desc
)
37 struct s390_sha_ctx
*sctx
= shash_desc_ctx(desc
);
39 sctx
->state
[0] = SHA1_H0
;
40 sctx
->state
[1] = SHA1_H1
;
41 sctx
->state
[2] = SHA1_H2
;
42 sctx
->state
[3] = SHA1_H3
;
43 sctx
->state
[4] = SHA1_H4
;
45 sctx
->func
= CPACF_KIMD_SHA_1
;
50 static int sha1_export(struct shash_desc
*desc
, void *out
)
52 struct s390_sha_ctx
*sctx
= shash_desc_ctx(desc
);
53 struct sha1_state
*octx
= out
;
55 octx
->count
= sctx
->count
;
56 memcpy(octx
->state
, sctx
->state
, sizeof(octx
->state
));
57 memcpy(octx
->buffer
, sctx
->buf
, sizeof(octx
->buffer
));
61 static int sha1_import(struct shash_desc
*desc
, const void *in
)
63 struct s390_sha_ctx
*sctx
= shash_desc_ctx(desc
);
64 const struct sha1_state
*ictx
= in
;
66 sctx
->count
= ictx
->count
;
67 memcpy(sctx
->state
, ictx
->state
, sizeof(ictx
->state
));
68 memcpy(sctx
->buf
, ictx
->buffer
, sizeof(ictx
->buffer
));
69 sctx
->func
= CPACF_KIMD_SHA_1
;
73 static struct shash_alg alg
= {
74 .digestsize
= SHA1_DIGEST_SIZE
,
76 .update
= s390_sha_update
,
77 .final
= s390_sha_final
,
78 .export
= sha1_export
,
79 .import
= sha1_import
,
80 .descsize
= sizeof(struct s390_sha_ctx
),
81 .statesize
= sizeof(struct sha1_state
),
84 .cra_driver_name
= "sha1-s390",
86 .cra_flags
= CRYPTO_ALG_TYPE_SHASH
,
87 .cra_blocksize
= SHA1_BLOCK_SIZE
,
88 .cra_module
= THIS_MODULE
,
92 static int __init
sha1_s390_init(void)
94 if (!cpacf_query_func(CPACF_KIMD
, CPACF_KIMD_SHA_1
))
96 return crypto_register_shash(&alg
);
99 static void __exit
sha1_s390_fini(void)
101 crypto_unregister_shash(&alg
);
104 module_cpu_feature_match(MSA
, sha1_s390_init
);
105 module_exit(sha1_s390_fini
);
107 MODULE_ALIAS_CRYPTO("sha1");
108 MODULE_LICENSE("GPL");
109 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");