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a24d22b225
Currently <crypto/sha.h> contains declarations for both SHA-1 and SHA-2, and <crypto/sha3.h> contains declarations for SHA-3. This organization is inconsistent, but more importantly SHA-1 is no longer considered to be cryptographically secure. So to the extent possible, SHA-1 shouldn't be grouped together with any of the other SHA versions, and usage of it should be phased out. Therefore, split <crypto/sha.h> into two headers <crypto/sha1.h> and <crypto/sha2.h>, and make everyone explicitly specify whether they want the declarations for SHA-1, SHA-2, or both. This avoids making the SHA-1 declarations visible to files that don't want anything to do with SHA-1. It also prepares for potentially moving sha1.h into a new insecure/ or dangerous/ directory. Signed-off-by: Eric Biggers <ebiggers@google.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Acked-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/sha2.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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