arch/arm/crypto/sha512-glue.c

   1 /*
   2  * sha512-glue.c - accelerated SHA-384/512 for ARM
   3  *
   4  * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <crypto/internal/hash.h>
  12 #include <crypto/sha.h>
  13 #include <crypto/sha512_base.h>
  14 #include <linux/crypto.h>
  15 #include <linux/module.h>
  16
  17 #include <asm/hwcap.h>
  18 #include <asm/neon.h>
  19
  20 #include "sha512.h"
  21
  22 MODULE_DESCRIPTION("Accelerated SHA-384/SHA-512 secure hash for ARM");
  23 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
  24 MODULE_LICENSE("GPL v2");
  25
  26 MODULE_ALIAS_CRYPTO("sha384");
  27 MODULE_ALIAS_CRYPTO("sha512");
  28 MODULE_ALIAS_CRYPTO("sha384-arm");
  29 MODULE_ALIAS_CRYPTO("sha512-arm");
  30
  31 asmlinkage void sha512_block_data_order(struct sha512_state *state,
  32                                         u8 const *src, int blocks);
  33
  34 int sha512_arm_update(struct shash_desc *desc, const u8 *data,
  35                       unsigned int len)
  36 {
  37         return sha512_base_do_update(desc, data, len, sha512_block_data_order);
  38 }
  39
  40 int sha512_arm_final(struct shash_desc *desc, u8 *out)
  41 {
  42         sha512_base_do_finalize(desc, sha512_block_data_order);
  43         return sha512_base_finish(desc, out);
  44 }
  45
  46 int sha512_arm_finup(struct shash_desc *desc, const u8 *data,
  47                      unsigned int len, u8 *out)
  48 {
  49         sha512_base_do_update(desc, data, len, sha512_block_data_order);
  50         return sha512_arm_final(desc, out);
  51 }
  52
  53 static struct shash_alg sha512_arm_algs[] = { {
  54         .init                   = sha384_base_init,
  55         .update                 = sha512_arm_update,
  56         .final                  = sha512_arm_final,
  57         .finup                  = sha512_arm_finup,
  58         .descsize               = sizeof(struct sha512_state),
  59         .digestsize             = SHA384_DIGEST_SIZE,
  60         .base                   = {
  61                 .cra_name               = "sha384",
  62                 .cra_driver_name        = "sha384-arm",
  63                 .cra_priority           = 250,
  64                 .cra_blocksize          = SHA512_BLOCK_SIZE,
  65                 .cra_module             = THIS_MODULE,
  66         }
  67 },  {
  68         .init                   = sha512_base_init,
  69         .update                 = sha512_arm_update,
  70         .final                  = sha512_arm_final,
  71         .finup                  = sha512_arm_finup,
  72         .descsize               = sizeof(struct sha512_state),
  73         .digestsize             = SHA512_DIGEST_SIZE,
  74         .base                   = {
  75                 .cra_name               = "sha512",
  76                 .cra_driver_name        = "sha512-arm",
  77                 .cra_priority           = 250,
  78                 .cra_blocksize          = SHA512_BLOCK_SIZE,
  79                 .cra_module             = THIS_MODULE,
  80         }
  81 } };
  82
  83 static int __init sha512_arm_mod_init(void)
  84 {
  85         int err;
  86
  87         err = crypto_register_shashes(sha512_arm_algs,
  88                                       ARRAY_SIZE(sha512_arm_algs));
  89         if (err)
  90                 return err;
  91
  92         if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon()) {
  93                 err = crypto_register_shashes(sha512_neon_algs,
  94                                               ARRAY_SIZE(sha512_neon_algs));
  95                 if (err)
  96                         goto err_unregister;
  97         }
  98         return 0;
  99
 100 err_unregister:
 101         crypto_unregister_shashes(sha512_arm_algs,
 102                                   ARRAY_SIZE(sha512_arm_algs));
 103
 104         return err;
 105 }
 106
 107 static void __exit sha512_arm_mod_fini(void)
 108 {
 109         crypto_unregister_shashes(sha512_arm_algs,
 110                                   ARRAY_SIZE(sha512_arm_algs));
 111         if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon())
 112                 crypto_unregister_shashes(sha512_neon_algs,
 113                                           ARRAY_SIZE(sha512_neon_algs));
 114 }
 115
 116 module_init(sha512_arm_mod_init);
 117 module_exit(sha512_arm_mod_fini);