| | 1 | /* |
| | 2 | * Cryptographic API. |
| | 3 | * |
| | 4 | * SHA1 Secure Hash Algorithm. |
| | 5 | * |
| | 6 | * Derived from cryptoapi implementation, adapted for in-place |
| | 7 | * scatterlist interface. |
| | 8 | * |
| | 9 | * Copyright (c) Alan Smithee. |
| | 10 | * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> |
| | 11 | * Copyright (c) Jean-Francois Dive <jef@linuxbe.org> |
| | 12 | * |
| | 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) |
| | 16 | * any later version. |
| | 17 | * |
| | 18 | */ |
| | 19 | #include <crypto/internal/hash.h> |
| | 20 | #include <linux/init.h> |
| | 21 | #include <linux/module.h> |
| | 22 | #include <linux/mm.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> |
| | 28 | |
| | 29 | static void sha1_generic_block_fn(struct sha1_state *sst, u8 const *src, |
| | 30 | int blocks) |
| | 31 | { |
| | 32 | u32 temp[SHA_WORKSPACE_WORDS]; |
| | 33 | |
| | 34 | while (blocks--) { |
| | 35 | sha_transform(sst->state, src, temp); |
| | 36 | src += SHA1_BLOCK_SIZE; |
| | 37 | } |
| | 38 | memzero_explicit(temp, sizeof(temp)); |
| | 39 | } |
| | 40 | |
| | 41 | int crypto_sha1_update(struct shash_desc *desc, const u8 *data, |
| | 42 | unsigned int len) |
| | 43 | { |
| | 44 | return sha1_base_do_update(desc, data, len, sha1_generic_block_fn); |
| | 45 | } |
| | 46 | EXPORT_SYMBOL(crypto_sha1_update); |
| | 47 | |
| | 48 | static int sha1_final(struct shash_desc *desc, u8 *out) |
| | 49 | { |
| | 50 | sha1_base_do_finalize(desc, sha1_generic_block_fn); |
| | 51 | return sha1_base_finish(desc, out); |
| | 52 | } |
| | 53 | |
| | 54 | int crypto_sha1_finup(struct shash_desc *desc, const u8 *data, |
| | 55 | unsigned int len, u8 *out) |
| | 56 | { |
| | 57 | sha1_base_do_update(desc, data, len, sha1_generic_block_fn); |
| | 58 | return sha1_final(desc, out); |
| | 59 | } |
| | 60 | EXPORT_SYMBOL(crypto_sha1_finup); |
| | 61 | |
| | 62 | static struct shash_alg alg = { |
| | 63 | .digestsize = SHA1_DIGEST_SIZE, |
| | 64 | .init = sha1_base_init, |
| | 65 | .update = crypto_sha1_update, |
| | 66 | .final = sha1_final, |
| | 67 | .finup = crypto_sha1_finup, |
| | 68 | .descsize = sizeof(struct sha1_state), |
| | 69 | .base = { |
| | 70 | .cra_name = "sha1", |
| | 71 | .cra_driver_name= "sha1-generic", |
| | 72 | .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| | 73 | .cra_blocksize = SHA1_BLOCK_SIZE, |
| | 74 | .cra_module = THIS_MODULE, |
| | 75 | } |
| | 76 | }; |
| | 77 | |
| | 78 | static int __init sha1_generic_mod_init(void) |
| | 79 | { |
| | 80 | return crypto_register_shash(&alg); |
| | 81 | } |
| | 82 | |
| | 83 | static void __exit sha1_generic_mod_fini(void) |
| | 84 | { |
| | 85 | crypto_unregister_shash(&alg); |
| | 86 | } |
| | 87 | |
| | 88 | module_init(sha1_generic_mod_init); |
| | 89 | module_exit(sha1_generic_mod_fini); |
| | 90 | |
| | 91 | MODULE_LICENSE("GPL"); |
| | 92 | MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm"); |
| | 93 | |
| | 94 | MODULE_ALIAS_CRYPTO("sha1"); |
| | 95 | MODULE_ALIAS_CRYPTO("sha1-generic"); |
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