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https://github.com/torvalds/linux
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13855fd8ce
The SHA-256 / SHA-224 library functions can't fail, so remove the useless return value. Also long as the declarations are being changed anyway, also fix some parameter names in the declarations to match the definitions. Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Crypto API wrapper for the generic SHA256 code from lib/crypto/sha256.c
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*
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* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
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* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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* SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
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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/types.h>
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#include <crypto/sha.h>
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#include <crypto/sha256_base.h>
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#include <asm/byteorder.h>
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#include <asm/unaligned.h>
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const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE] = {
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0xd1, 0x4a, 0x02, 0x8c, 0x2a, 0x3a, 0x2b, 0xc9, 0x47,
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0x61, 0x02, 0xbb, 0x28, 0x82, 0x34, 0xc4, 0x15, 0xa2,
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0xb0, 0x1f, 0x82, 0x8e, 0xa6, 0x2a, 0xc5, 0xb3, 0xe4,
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0x2f
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};
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EXPORT_SYMBOL_GPL(sha224_zero_message_hash);
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const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE] = {
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0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
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0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
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0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
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0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55
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};
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EXPORT_SYMBOL_GPL(sha256_zero_message_hash);
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static int crypto_sha256_init(struct shash_desc *desc)
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{
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sha256_init(shash_desc_ctx(desc));
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return 0;
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}
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static int crypto_sha224_init(struct shash_desc *desc)
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{
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sha224_init(shash_desc_ctx(desc));
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return 0;
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}
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int crypto_sha256_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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sha256_update(shash_desc_ctx(desc), data, len);
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return 0;
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}
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EXPORT_SYMBOL(crypto_sha256_update);
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static int crypto_sha256_final(struct shash_desc *desc, u8 *out)
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{
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if (crypto_shash_digestsize(desc->tfm) == SHA224_DIGEST_SIZE)
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sha224_final(shash_desc_ctx(desc), out);
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else
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sha256_final(shash_desc_ctx(desc), out);
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return 0;
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}
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int crypto_sha256_finup(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *hash)
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{
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sha256_update(shash_desc_ctx(desc), data, len);
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return crypto_sha256_final(desc, hash);
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}
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EXPORT_SYMBOL(crypto_sha256_finup);
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static struct shash_alg sha256_algs[2] = { {
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.digestsize = SHA256_DIGEST_SIZE,
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.init = crypto_sha256_init,
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.update = crypto_sha256_update,
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.final = crypto_sha256_final,
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.finup = crypto_sha256_finup,
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.descsize = sizeof(struct sha256_state),
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.base = {
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.cra_name = "sha256",
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.cra_driver_name= "sha256-generic",
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.cra_priority = 100,
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.cra_blocksize = SHA256_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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}, {
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.digestsize = SHA224_DIGEST_SIZE,
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.init = crypto_sha224_init,
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.update = crypto_sha256_update,
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.final = crypto_sha256_final,
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.finup = crypto_sha256_finup,
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.descsize = sizeof(struct sha256_state),
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.base = {
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.cra_name = "sha224",
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.cra_driver_name= "sha224-generic",
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.cra_priority = 100,
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.cra_blocksize = SHA224_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 sha256_generic_mod_init(void)
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{
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return crypto_register_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));
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}
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static void __exit sha256_generic_mod_fini(void)
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{
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crypto_unregister_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));
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}
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subsys_initcall(sha256_generic_mod_init);
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module_exit(sha256_generic_mod_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm");
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MODULE_ALIAS_CRYPTO("sha224");
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MODULE_ALIAS_CRYPTO("sha224-generic");
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MODULE_ALIAS_CRYPTO("sha256");
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MODULE_ALIAS_CRYPTO("sha256-generic");
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