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(u64 *state, u8 const *src, int blocks);
  29
  30 int sha512_arm_update(struct shash_desc *desc, const u8 *data,
  31                       unsigned int len)
  32 {
  33         return sha512_base_do_update(desc, data, len,
  34                 (sha512_block_fn *)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,
  40                 (sha512_block_fn *)sha512_block_data_order);
  41         return sha512_base_finish(desc, out);
  42 }
  43
  44 int sha512_arm_finup(struct shash_desc *desc, const u8 *data,
  45                      unsigned int len, u8 *out)
  46 {
  47         sha512_base_do_update(desc, data, len,
  48                 (sha512_block_fn *)sha512_block_data_order);
  49         return sha512_arm_final(desc, out);
  50 }
  51
  52 static struct shash_alg sha512_arm_algs[] = { {
  53         .init                   = sha384_base_init,
  54         .update                 = sha512_arm_update,
  55         .final                  = sha512_arm_final,
  56         .finup                  = sha512_arm_finup,
  57         .descsize               = sizeof(struct sha512_state),
  58         .digestsize             = SHA384_DIGEST_SIZE,
  59         .base                   = {
  60                 .cra_name               = "sha384",
  61                 .cra_driver_name        = "sha384-arm",
  62                 .cra_priority           = 250,
  63                 .cra_blocksize          = SHA512_BLOCK_SIZE,
  64                 .cra_module             = THIS_MODULE,
  65         }
  66 },  {
  67         .init                   = sha512_base_init,
  68         .update                 = sha512_arm_update,
  69         .final                  = sha512_arm_final,
  70         .finup                  = sha512_arm_finup,
  71         .descsize               = sizeof(struct sha512_state),
  72         .digestsize             = SHA512_DIGEST_SIZE,
  73         .base                   = {
  74                 .cra_name               = "sha512",
  75                 .cra_driver_name        = "sha512-arm",
  76                 .cra_priority           = 250,
  77                 .cra_blocksize          = SHA512_BLOCK_SIZE,
  78                 .cra_module             = THIS_MODULE,
  79         }
  80 } };
  81
  82 static int __init sha512_arm_mod_init(void)
  83 {
  84         int err;
  85
  86         err = crypto_register_shashes(sha512_arm_algs,
  87                                       ARRAY_SIZE(sha512_arm_algs));
  88         if (err)
  89                 return err;
  90
  91         if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon()) {
  92                 err = crypto_register_shashes(sha512_neon_algs,
  93                                               ARRAY_SIZE(sha512_neon_algs));
  94                 if (err)
  95                         goto err_unregister;
  96         }
  97         return 0;
  98
  99 err_unregister:
 100         crypto_unregister_shashes(sha512_arm_algs,
 101                                   ARRAY_SIZE(sha512_arm_algs));
 102
 103         return err;
 104 }
 105
 106 static void __exit sha512_arm_mod_fini(void)
 107 {
 108         crypto_unregister_shashes(sha512_arm_algs,
 109                                   ARRAY_SIZE(sha512_arm_algs));
 110         if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon())
 111                 crypto_unregister_shashes(sha512_neon_algs,
 112                                           ARRAY_SIZE(sha512_neon_algs));
 113 }
 114
 115 module_init(sha512_arm_mod_init);
 116 module_exit(sha512_arm_mod_fini);