diff options
Diffstat (limited to 'crypto/sha256_generic.c')
| -rw-r--r-- | crypto/sha256_generic.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/crypto/sha256_generic.c b/crypto/sha256_generic.c new file mode 100644 index 000000000..88156e3e2 --- /dev/null +++ b/crypto/sha256_generic.c @@ -0,0 +1,122 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Crypto API wrapper for the generic SHA256 code from lib/crypto/sha256.c + * + * 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> + * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com> + */ +#include <crypto/internal/hash.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/mm.h> +#include <linux/types.h> +#include <crypto/sha.h> +#include <crypto/sha256_base.h> +#include <asm/byteorder.h> +#include <asm/unaligned.h> + +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); + +static int crypto_sha256_init(struct shash_desc *desc) +{ + sha256_init(shash_desc_ctx(desc)); + return 0; +} + +static int crypto_sha224_init(struct shash_desc *desc) +{ + sha224_init(shash_desc_ctx(desc)); + return 0; +} + +int crypto_sha256_update(struct shash_desc *desc, const u8 *data, + unsigned int len) +{ + sha256_update(shash_desc_ctx(desc), data, len); + return 0; +} +EXPORT_SYMBOL(crypto_sha256_update); + +static int crypto_sha256_final(struct shash_desc *desc, u8 *out) +{ + if (crypto_shash_digestsize(desc->tfm) == SHA224_DIGEST_SIZE) + sha224_final(shash_desc_ctx(desc), out); + else + sha256_final(shash_desc_ctx(desc), out); + return 0; +} + +int crypto_sha256_finup(struct shash_desc *desc, const u8 *data, + unsigned int len, u8 *hash) +{ + sha256_update(shash_desc_ctx(desc), data, len); + return crypto_sha256_final(desc, hash); +} +EXPORT_SYMBOL(crypto_sha256_finup); + +static struct shash_alg sha256_algs[2] = { { + .digestsize = SHA256_DIGEST_SIZE, + .init = crypto_sha256_init, + .update = crypto_sha256_update, + .final = crypto_sha256_final, + .finup = crypto_sha256_finup, + .descsize = sizeof(struct sha256_state), + .base = { + .cra_name = "sha256", + .cra_driver_name= "sha256-generic", + .cra_priority = 100, + .cra_blocksize = SHA256_BLOCK_SIZE, + .cra_module = THIS_MODULE, + } +}, { + .digestsize = SHA224_DIGEST_SIZE, + .init = crypto_sha224_init, + .update = crypto_sha256_update, + .final = crypto_sha256_final, + .finup = crypto_sha256_finup, + .descsize = sizeof(struct sha256_state), + .base = { + .cra_name = "sha224", + .cra_driver_name= "sha224-generic", + .cra_priority = 100, + .cra_blocksize = SHA224_BLOCK_SIZE, + .cra_module = THIS_MODULE, + } +} }; + +static int __init sha256_generic_mod_init(void) +{ + return crypto_register_shashes(sha256_algs, ARRAY_SIZE(sha256_algs)); +} + +static void __exit sha256_generic_mod_fini(void) +{ + crypto_unregister_shashes(sha256_algs, ARRAY_SIZE(sha256_algs)); +} + +subsys_initcall(sha256_generic_mod_init); +module_exit(sha256_generic_mod_fini); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm"); + +MODULE_ALIAS_CRYPTO("sha224"); +MODULE_ALIAS_CRYPTO("sha224-generic"); +MODULE_ALIAS_CRYPTO("sha256"); +MODULE_ALIAS_CRYPTO("sha256-generic"); |