git.sesse.net Git - bcachefs-tools-debian/blob - linux/crypto/sha256_generic.c

   1 /*
   2  * Cryptographic API.
   3  *
   4  * SHA-256, as specified in
   5  * http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf
   6  *
   7  * SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
   8  *
   9  * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
  10  * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
  11  * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
  12  * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
  13  *
  14  * This program is free software; you can redistribute it and/or modify it
  15  * under the terms of the GNU General Public License as published by the Free
  16  * Software Foundation; either version 2 of the License, or (at your option)
  17  * any later version.
  18  *
  19  */
  20
  21 #include <linux/bitops.h>
  22 #include <linux/byteorder.h>
  23 #include <linux/types.h>
  24 #include <asm/unaligned.h>
  25
  26 #include <linux/crypto.h>
  27 #include <crypto/internal/hash.h>
  28
  29 #include <sodium/crypto_hash_sha256.h>
  30
  31 static int sha256_init(struct shash_desc *desc)
  32 {
  33         crypto_hash_sha256_state *state = shash_desc_ctx(desc);
  34
  35         return crypto_hash_sha256_init(state);
  36 }
  37
  38 static int sha256_update(struct shash_desc *desc, const u8 *data,
  39                           unsigned int len)
  40 {
  41         crypto_hash_sha256_state *state = shash_desc_ctx(desc);
  42
  43         return crypto_hash_sha256_update(state, data, len);
  44 }
  45
  46 static int sha256_final(struct shash_desc *desc, u8 *out)
  47 {
  48         crypto_hash_sha256_state *state = shash_desc_ctx(desc);
  49
  50         return crypto_hash_sha256_final(state, out);
  51 }
  52
  53 static struct shash_alg sha256_alg = {
  54         .digestsize     = crypto_hash_sha256_BYTES,
  55         .init           = sha256_init,
  56         .update         = sha256_update,
  57         .final          = sha256_final,
  58         .descsize       = sizeof(crypto_hash_sha256_state),
  59         .base           = {
  60                 .cra_name       = "sha256",
  61                 .cra_flags      = CRYPTO_ALG_TYPE_SHASH,
  62         }
  63 };
  64
  65 __attribute__((constructor(110)))
  66 static int __init sha256_generic_mod_init(void)
  67 {
  68         return crypto_register_shash(&sha256_alg);
  69 }