arch/arm/crypto/sha512-glue.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * sha512-glue.c - accelerated SHA-384/512 for ARM
   4  *
   5  * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
   6  */
   7
   8 #include <crypto/internal/hash.h>
   9 #include <crypto/sha2.h>
  10 #include <crypto/sha512_base.h>
  11 #include <linux/crypto.h>
  12 #include <linux/module.h>
  13
  14 #include <asm/hwcap.h>
  15 #include <asm/neon.h>
  16
  17 #include "sha512.h"
  18
  19 MODULE_DESCRIPTION("Accelerated SHA-384/SHA-512 secure hash for ARM");
  20 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
  21 MODULE_LICENSE("GPL v2");
  22
  23 MODULE_ALIAS_CRYPTO("sha384");
  24 MODULE_ALIAS_CRYPTO("sha512");
  25 MODULE_ALIAS_CRYPTO("sha384-arm");
  26 MODULE_ALIAS_CRYPTO("sha512-arm");
  27
  28 asmlinkage void sha512_block_data_order(struct sha512_state *state,
  29                                         u8 const *src, int blocks);
  30
  31 int sha512_arm_update(struct shash_desc *desc, const u8 *data,
  32                       unsigned int len)
  33 {
  34         return sha512_base_do_update(desc, data, len, sha512_block_data_order);
  35 }
  36
  37 static int sha512_arm_final(struct shash_desc *desc, u8 *out)
  38 {
  39         sha512_base_do_finalize(desc, sha512_block_data_order);
  40         return sha512_base_finish(desc, out);
  41 }
  42
  43 int sha512_arm_finup(struct shash_desc *desc, const u8 *data,
  44                      unsigned int len, u8 *out)
  45 {
  46         sha512_base_do_update(desc, data, len, sha512_block_data_order);
  47         return sha512_arm_final(desc, out);
  48 }
  49
  50 static struct shash_alg sha512_arm_algs[] = { {
  51         .init                   = sha384_base_init,
  52         .update                 = sha512_arm_update,
  53         .final                  = sha512_arm_final,
  54         .finup                  = sha512_arm_finup,
  55         .descsize               = sizeof(struct sha512_state),
  56         .digestsize             = SHA384_DIGEST_SIZE,
  57         .base                   = {
  58                 .cra_name               = "sha384",
  59                 .cra_driver_name        = "sha384-arm",
  60                 .cra_priority           = 250,
  61                 .cra_blocksize          = SHA512_BLOCK_SIZE,
  62                 .cra_module             = THIS_MODULE,
  63         }
  64 },  {
  65         .init                   = sha512_base_init,
  66         .update                 = sha512_arm_update,
  67         .final                  = sha512_arm_final,
  68         .finup                  = sha512_arm_finup,
  69         .descsize               = sizeof(struct sha512_state),
  70         .digestsize             = SHA512_DIGEST_SIZE,
  71         .base                   = {
  72                 .cra_name               = "sha512",
  73                 .cra_driver_name        = "sha512-arm",
  74                 .cra_priority           = 250,
  75                 .cra_blocksize          = SHA512_BLOCK_SIZE,
  76                 .cra_module             = THIS_MODULE,
  77         }
  78 } };
  79
  80 static int __init sha512_arm_mod_init(void)
  81 {
  82         int err;
  83
  84         err = crypto_register_shashes(sha512_arm_algs,
  85                                       ARRAY_SIZE(sha512_arm_algs));
  86         if (err)
  87                 return err;
  88
  89         if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon()) {
  90                 err = crypto_register_shashes(sha512_neon_algs,
  91                                               ARRAY_SIZE(sha512_neon_algs));
  92                 if (err)
  93                         goto err_unregister;
  94         }
  95         return 0;
  96
  97 err_unregister:
  98         crypto_unregister_shashes(sha512_arm_algs,
  99                                   ARRAY_SIZE(sha512_arm_algs));
 100
 101         return err;
 102 }
 103
 104 static void __exit sha512_arm_mod_fini(void)
 105 {
 106         crypto_unregister_shashes(sha512_arm_algs,
 107                                   ARRAY_SIZE(sha512_arm_algs));
 108         if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon())
 109                 crypto_unregister_shashes(sha512_neon_algs,
 110                                           ARRAY_SIZE(sha512_neon_algs));
 111 }
 112
 113 module_init(sha512_arm_mod_init);
 114 module_exit(sha512_arm_mod_fini);