diff options
Diffstat (limited to 'c_src/linux/crypto/sha256_generic.c')
-rw-r--r-- | c_src/linux/crypto/sha256_generic.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/c_src/linux/crypto/sha256_generic.c b/c_src/linux/crypto/sha256_generic.c new file mode 100644 index 00000000..9326bfe7 --- /dev/null +++ b/c_src/linux/crypto/sha256_generic.c @@ -0,0 +1,81 @@ +/* + * Cryptographic API. + * + * SHA-256, as specified in + * http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf + * + * SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>. + * + * 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> + * + * 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 <linux/bitops.h> +#include <linux/byteorder.h> +#include <linux/types.h> +#include <asm/unaligned.h> + +#include <linux/crypto.h> +#include <crypto/hash.h> + +#include <sodium/crypto_hash_sha256.h> + +static struct shash_alg sha256_alg; + +static int sha256_init(struct shash_desc *desc) +{ + crypto_hash_sha256_state *state = (void *) desc->ctx; + + return crypto_hash_sha256_init(state); +} + +static int sha256_update(struct shash_desc *desc, const u8 *data, + unsigned int len) +{ + crypto_hash_sha256_state *state = (void *) desc->ctx; + + return crypto_hash_sha256_update(state, data, len); +} + +static int sha256_final(struct shash_desc *desc, u8 *out) +{ + crypto_hash_sha256_state *state = (void *) desc->ctx; + + return crypto_hash_sha256_final(state, out); +} + +static void *sha256_alloc_tfm(void) +{ + struct crypto_shash *tfm = kzalloc(sizeof(*tfm), GFP_KERNEL); + + if (!tfm) + return NULL; + + tfm->base.alg = &sha256_alg.base; + tfm->descsize = sizeof(crypto_hash_sha256_state); + return tfm; +} + +static struct shash_alg sha256_alg = { + .digestsize = crypto_hash_sha256_BYTES, + .init = sha256_init, + .update = sha256_update, + .final = sha256_final, + .descsize = sizeof(crypto_hash_sha256_state), + .base.cra_name = "sha256", + .base.alloc_tfm = sha256_alloc_tfm, +}; + +__attribute__((constructor(110))) +static int __init sha256_generic_mod_init(void) +{ + return crypto_register_shash(&sha256_alg); +} |