4 * SHA1 Secure Hash Algorithm.
6 * Derived from cryptoapi implementation, adapted for in-place
7 * scatterlist interface.
9 * Copyright (c) Alan Smithee.
10 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
11 * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the Free
15 * Software Foundation; either version 2 of the License, or (at your option)
19 #include <crypto/internal/hash.h>
20 #include <linux/init.h>
21 #include <linux/module.h>
23 #include <linux/cryptohash.h>
24 #include <linux/types.h>
25 #include <crypto/sha.h>
26 #include <crypto/sha1_base.h>
27 #include <asm/byteorder.h>
29 static void sha1_generic_block_fn(struct sha1_state
*sst
, u8
const *src
,
32 u32 temp
[SHA_WORKSPACE_WORDS
];
35 sha_transform(sst
->state
, src
, temp
);
36 src
+= SHA1_BLOCK_SIZE
;
38 memzero_explicit(temp
, sizeof(temp
));
41 int crypto_sha1_update(struct shash_desc
*desc
, const u8
*data
,
44 return sha1_base_do_update(desc
, data
, len
, sha1_generic_block_fn
);
46 EXPORT_SYMBOL(crypto_sha1_update
);
48 static int sha1_final(struct shash_desc
*desc
, u8
*out
)
50 sha1_base_do_finalize(desc
, sha1_generic_block_fn
);
51 return sha1_base_finish(desc
, out
);
54 int crypto_sha1_finup(struct shash_desc
*desc
, const u8
*data
,
55 unsigned int len
, u8
*out
)
57 sha1_base_do_update(desc
, data
, len
, sha1_generic_block_fn
);
58 return sha1_final(desc
, out
);
60 EXPORT_SYMBOL(crypto_sha1_finup
);
62 static struct shash_alg alg
= {
63 .digestsize
= SHA1_DIGEST_SIZE
,
64 .init
= sha1_base_init
,
65 .update
= crypto_sha1_update
,
67 .finup
= crypto_sha1_finup
,
68 .descsize
= sizeof(struct sha1_state
),
71 .cra_driver_name
= "sha1-generic",
72 .cra_flags
= CRYPTO_ALG_TYPE_SHASH
,
73 .cra_blocksize
= SHA1_BLOCK_SIZE
,
74 .cra_module
= THIS_MODULE
,
78 static int __init
sha1_generic_mod_init(void)
80 return crypto_register_shash(&alg
);
83 static void __exit
sha1_generic_mod_fini(void)
85 crypto_unregister_shash(&alg
);
88 module_init(sha1_generic_mod_init
);
89 module_exit(sha1_generic_mod_fini
);
91 MODULE_LICENSE("GPL");
92 MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");
94 MODULE_ALIAS_CRYPTO("sha1");
95 MODULE_ALIAS_CRYPTO("sha1-generic");
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