111 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Crypto API wrapper for the generic SHA256 code from lib/crypto/sha256.c4 *5 * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>6 * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>7 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>8 * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>9 */10#include <crypto/internal/hash.h>11#include <linux/init.h>12#include <linux/module.h>13#include <linux/mm.h>14#include <linux/types.h>15#include <crypto/sha2.h>16#include <crypto/sha256_base.h>17#include <asm/byteorder.h>18#include <linux/unaligned.h>19 20const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE] = {21 0xd1, 0x4a, 0x02, 0x8c, 0x2a, 0x3a, 0x2b, 0xc9, 0x47,22 0x61, 0x02, 0xbb, 0x28, 0x82, 0x34, 0xc4, 0x15, 0xa2,23 0xb0, 0x1f, 0x82, 0x8e, 0xa6, 0x2a, 0xc5, 0xb3, 0xe4,24 0x2f25};26EXPORT_SYMBOL_GPL(sha224_zero_message_hash);27 28const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE] = {29 0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,30 0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,31 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,32 0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x5533};34EXPORT_SYMBOL_GPL(sha256_zero_message_hash);35 36int crypto_sha256_update(struct shash_desc *desc, const u8 *data,37 unsigned int len)38{39 sha256_update(shash_desc_ctx(desc), data, len);40 return 0;41}42EXPORT_SYMBOL(crypto_sha256_update);43 44static int crypto_sha256_final(struct shash_desc *desc, u8 *out)45{46 if (crypto_shash_digestsize(desc->tfm) == SHA224_DIGEST_SIZE)47 sha224_final(shash_desc_ctx(desc), out);48 else49 sha256_final(shash_desc_ctx(desc), out);50 return 0;51}52 53int crypto_sha256_finup(struct shash_desc *desc, const u8 *data,54 unsigned int len, u8 *hash)55{56 sha256_update(shash_desc_ctx(desc), data, len);57 return crypto_sha256_final(desc, hash);58}59EXPORT_SYMBOL(crypto_sha256_finup);60 61static struct shash_alg sha256_algs[2] = { {62 .digestsize = SHA256_DIGEST_SIZE,63 .init = sha256_base_init,64 .update = crypto_sha256_update,65 .final = crypto_sha256_final,66 .finup = crypto_sha256_finup,67 .descsize = sizeof(struct sha256_state),68 .base = {69 .cra_name = "sha256",70 .cra_driver_name= "sha256-generic",71 .cra_priority = 100,72 .cra_blocksize = SHA256_BLOCK_SIZE,73 .cra_module = THIS_MODULE,74 }75}, {76 .digestsize = SHA224_DIGEST_SIZE,77 .init = sha224_base_init,78 .update = crypto_sha256_update,79 .final = crypto_sha256_final,80 .finup = crypto_sha256_finup,81 .descsize = sizeof(struct sha256_state),82 .base = {83 .cra_name = "sha224",84 .cra_driver_name= "sha224-generic",85 .cra_priority = 100,86 .cra_blocksize = SHA224_BLOCK_SIZE,87 .cra_module = THIS_MODULE,88 }89} };90 91static int __init sha256_generic_mod_init(void)92{93 return crypto_register_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));94}95 96static void __exit sha256_generic_mod_fini(void)97{98 crypto_unregister_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));99}100 101subsys_initcall(sha256_generic_mod_init);102module_exit(sha256_generic_mod_fini);103 104MODULE_LICENSE("GPL");105MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm");106 107MODULE_ALIAS_CRYPTO("sha224");108MODULE_ALIAS_CRYPTO("sha224-generic");109MODULE_ALIAS_CRYPTO("sha256");110MODULE_ALIAS_CRYPTO("sha256-generic");111