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crypto/sha256_generic.c
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// 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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* * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com> * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> * 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> #include <linux/module.h> #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] = { 0xd1, 0x4a, 0x02, 0x8c, 0x2a, 0x3a, 0x2b, 0xc9, 0x47, 0x61, 0x02, 0xbb, 0x28, 0x82, 0x34, 0xc4, 0x15, 0xa2, 0xb0, 0x1f, 0x82, 0x8e, 0xa6, 0x2a, 0xc5, 0xb3, 0xe4, 0x2f }; EXPORT_SYMBOL_GPL(sha224_zero_message_hash); const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE] = { 0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, 0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24, 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c, 0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55 }; 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)); 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)); 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); 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); return 0; |
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} |
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int crypto_sha256_finup(struct shash_desc *desc, const u8 *data, unsigned int len, u8 *hash) |
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{ |
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sha256_update(shash_desc_ctx(desc), data, len); 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 = { .cra_name = "sha256", .cra_driver_name= "sha256-generic", |
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.cra_priority = 100, |
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.cra_blocksize = SHA256_BLOCK_SIZE, .cra_module = THIS_MODULE, } |
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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 = { .cra_name = "sha224", .cra_driver_name= "sha224-generic", |
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.cra_priority = 100, |
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.cra_blocksize = SHA224_BLOCK_SIZE, .cra_module = THIS_MODULE, } |
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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"); |