diff options
Diffstat (limited to 'crypto/sha1_generic.c')
-rw-r--r-- | crypto/sha1_generic.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/crypto/sha1_generic.c b/crypto/sha1_generic.c new file mode 100644 index 000000000..39e3acc43 --- /dev/null +++ b/crypto/sha1_generic.c @@ -0,0 +1,95 @@ +/* + * Cryptographic API. + * + * SHA1 Secure Hash Algorithm. + * + * Derived from cryptoapi implementation, adapted for in-place + * scatterlist interface. + * + * Copyright (c) Alan Smithee. + * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> + * Copyright (c) Jean-Francois Dive <jef@linuxbe.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + */ +#include <crypto/internal/hash.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/mm.h> +#include <linux/cryptohash.h> +#include <linux/types.h> +#include <crypto/sha.h> +#include <crypto/sha1_base.h> +#include <asm/byteorder.h> + +static void sha1_generic_block_fn(struct sha1_state *sst, u8 const *src, + int blocks) +{ + u32 temp[SHA_WORKSPACE_WORDS]; + + while (blocks--) { + sha_transform(sst->state, src, temp); + src += SHA1_BLOCK_SIZE; + } + memzero_explicit(temp, sizeof(temp)); +} + +int crypto_sha1_update(struct shash_desc *desc, const u8 *data, + unsigned int len) +{ + return sha1_base_do_update(desc, data, len, sha1_generic_block_fn); +} +EXPORT_SYMBOL(crypto_sha1_update); + +static int sha1_final(struct shash_desc *desc, u8 *out) +{ + sha1_base_do_finalize(desc, sha1_generic_block_fn); + return sha1_base_finish(desc, out); +} + +int crypto_sha1_finup(struct shash_desc *desc, const u8 *data, + unsigned int len, u8 *out) +{ + sha1_base_do_update(desc, data, len, sha1_generic_block_fn); + return sha1_final(desc, out); +} +EXPORT_SYMBOL(crypto_sha1_finup); + +static struct shash_alg alg = { + .digestsize = SHA1_DIGEST_SIZE, + .init = sha1_base_init, + .update = crypto_sha1_update, + .final = sha1_final, + .finup = crypto_sha1_finup, + .descsize = sizeof(struct sha1_state), + .base = { + .cra_name = "sha1", + .cra_driver_name= "sha1-generic", + .cra_flags = CRYPTO_ALG_TYPE_SHASH, + .cra_blocksize = SHA1_BLOCK_SIZE, + .cra_module = THIS_MODULE, + } +}; + +static int __init sha1_generic_mod_init(void) +{ + return crypto_register_shash(&alg); +} + +static void __exit sha1_generic_mod_fini(void) +{ + crypto_unregister_shash(&alg); +} + +module_init(sha1_generic_mod_init); +module_exit(sha1_generic_mod_fini); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm"); + +MODULE_ALIAS_CRYPTO("sha1"); +MODULE_ALIAS_CRYPTO("sha1-generic"); |