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95 lines
2.4 KiB
95 lines
2.4 KiB
/* |
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* Cryptographic API. |
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* |
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* SHA1 Secure Hash Algorithm. |
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* |
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* Derived from cryptoapi implementation, adapted for in-place |
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* scatterlist interface. |
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* |
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* Copyright (c) Alan Smithee. |
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* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> |
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* Copyright (c) Jean-Francois Dive <jef@linuxbe.org> |
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* |
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* This program is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License as published by the Free |
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* Software Foundation; either version 2 of the License, or (at your option) |
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* any later version. |
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* |
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*/ |
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#include <crypto/internal/hash.h> |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/mm.h> |
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#include <linux/cryptohash.h> |
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#include <linux/types.h> |
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#include <crypto/sha.h> |
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#include <crypto/sha1_base.h> |
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#include <asm/byteorder.h> |
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static void sha1_generic_block_fn(struct sha1_state *sst, u8 const *src, |
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int blocks) |
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{ |
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u32 temp[SHA_WORKSPACE_WORDS]; |
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while (blocks--) { |
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sha_transform(sst->state, src, temp); |
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src += SHA1_BLOCK_SIZE; |
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} |
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memzero_explicit(temp, sizeof(temp)); |
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} |
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int crypto_sha1_update(struct shash_desc *desc, const u8 *data, |
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unsigned int len) |
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{ |
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return sha1_base_do_update(desc, data, len, sha1_generic_block_fn); |
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} |
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EXPORT_SYMBOL(crypto_sha1_update); |
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static int sha1_final(struct shash_desc *desc, u8 *out) |
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{ |
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sha1_base_do_finalize(desc, sha1_generic_block_fn); |
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return sha1_base_finish(desc, out); |
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} |
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int crypto_sha1_finup(struct shash_desc *desc, const u8 *data, |
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unsigned int len, u8 *out) |
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{ |
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sha1_base_do_update(desc, data, len, sha1_generic_block_fn); |
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return sha1_final(desc, out); |
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} |
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EXPORT_SYMBOL(crypto_sha1_finup); |
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static struct shash_alg alg = { |
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.digestsize = SHA1_DIGEST_SIZE, |
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.init = sha1_base_init, |
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.update = crypto_sha1_update, |
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.final = sha1_final, |
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.finup = crypto_sha1_finup, |
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.descsize = sizeof(struct sha1_state), |
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.base = { |
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.cra_name = "sha1", |
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.cra_driver_name= "sha1-generic", |
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.cra_flags = CRYPTO_ALG_TYPE_SHASH, |
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.cra_blocksize = SHA1_BLOCK_SIZE, |
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.cra_module = THIS_MODULE, |
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} |
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}; |
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static int __init sha1_generic_mod_init(void) |
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{ |
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return crypto_register_shash(&alg); |
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} |
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static void __exit sha1_generic_mod_fini(void) |
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{ |
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crypto_unregister_shash(&alg); |
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} |
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module_init(sha1_generic_mod_init); |
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module_exit(sha1_generic_mod_fini); |
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MODULE_LICENSE("GPL"); |
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MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm"); |
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MODULE_ALIAS_CRYPTO("sha1"); |
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MODULE_ALIAS_CRYPTO("sha1-generic");
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