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(u64 *state, u8 const *src, int blocks);
  32
  33 int sha512_arm_update(struct shash_desc *desc, const u8 *data,
  34                       unsigned int len)
  35 {
  36         return sha512_base_do_update(desc, data, len,
  37                 (sha512_block_fn *)sha512_block_data_order);
  38 }
  39
  40 int sha512_arm_final(struct shash_desc *desc, u8 *out)
  41 {
  42         sha512_base_do_finalize(desc,
  43                 (sha512_block_fn *)sha512_block_data_order);
  44         return sha512_base_finish(desc, out);
  45 }
  46
  47 int sha512_arm_finup(struct shash_desc *desc, const u8 *data,
  48                      unsigned int len, u8 *out)
  49 {
  50         sha512_base_do_update(desc, data, len,
  51                 (sha512_block_fn *)sha512_block_data_order);
  52         return sha512_arm_final(desc, out);
  53 }
  54
  55 static struct shash_alg sha512_arm_algs[] = { {
  56         .init                   = sha384_base_init,
  57         .update                 = sha512_arm_update,
  58         .final                  = sha512_arm_final,
  59         .finup                  = sha512_arm_finup,
  60         .descsize               = sizeof(struct sha512_state),
  61         .digestsize             = SHA384_DIGEST_SIZE,
  62         .base                   = {
  63                 .cra_name               = "sha384",
  64                 .cra_driver_name        = "sha384-arm",
  65                 .cra_priority           = 250,
  66                 .cra_blocksize          = SHA512_BLOCK_SIZE,
  67                 .cra_module             = THIS_MODULE,
  68         }
  69 },  {
  70         .init                   = sha512_base_init,
  71         .update                 = sha512_arm_update,
  72         .final                  = sha512_arm_final,
  73         .finup                  = sha512_arm_finup,
  74         .descsize               = sizeof(struct sha512_state),
  75         .digestsize             = SHA512_DIGEST_SIZE,
  76         .base                   = {
  77                 .cra_name               = "sha512",
  78                 .cra_driver_name        = "sha512-arm",
  79                 .cra_priority           = 250,
  80                 .cra_blocksize          = SHA512_BLOCK_SIZE,
  81                 .cra_module             = THIS_MODULE,
  82         }
  83 } };
  84
  85 static int __init sha512_arm_mod_init(void)
  86 {
  87         int err;
  88
  89         err = crypto_register_shashes(sha512_arm_algs,
  90                                       ARRAY_SIZE(sha512_arm_algs));
  91         if (err)
  92                 return err;
  93
  94         if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon()) {
  95                 err = crypto_register_shashes(sha512_neon_algs,
  96                                               ARRAY_SIZE(sha512_neon_algs));
  97                 if (err)
  98                         goto err_unregister;
  99         }
 100         return 0;
 101
 102 err_unregister:
 103         crypto_unregister_shashes(sha512_arm_algs,
 104                                   ARRAY_SIZE(sha512_arm_algs));
 105
 106         return err;
 107 }
 108
 109 static void __exit sha512_arm_mod_fini(void)
 110 {
 111         crypto_unregister_shashes(sha512_arm_algs,
 112                                   ARRAY_SIZE(sha512_arm_algs));
 113         if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon())
 114                 crypto_unregister_shashes(sha512_neon_algs,
 115                                           ARRAY_SIZE(sha512_neon_algs));
 116 }
 117
 118 module_init(sha512_arm_mod_init);
 119 module_exit(sha512_arm_mod_fini);