arch/arm64/crypto/aes-cipher-glue.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Scalar AES core transform
   4  *
   5  * Copyright (C) 2017 Linaro Ltd <ard.biesheuvel@linaro.org>
   6  */
   7
   8 #include <crypto/aes.h>
   9 #include <linux/crypto.h>
  10 #include <linux/module.h>
  11
  12 MODULE_ALIAS_CRYPTO("ecb(aes)");
  13 MODULE_ALIAS_CRYPTO("cbc(aes)");
  14 MODULE_ALIAS_CRYPTO("ctr(aes)");
  15 MODULE_ALIAS_CRYPTO("xts(aes)");
  16 MODULE_ALIAS_CRYPTO("cts(cbc(aes))");
  17 MODULE_ALIAS_CRYPTO("essiv(cbc(aes),sha256)");
  18 MODULE_ALIAS_CRYPTO("cmac(aes)");
  19 MODULE_ALIAS_CRYPTO("xcbc(aes)");
  20 MODULE_ALIAS_CRYPTO("cbcmac(aes)");
  21
  22 asmlinkage void __aes_arm64_encrypt(u32 *rk, u8 *out, const u8 *in, int rounds);
  23 asmlinkage void __aes_arm64_decrypt(u32 *rk, u8 *out, const u8 *in, int rounds);
  24
  25 static void aes_arm64_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
  26 {
  27         struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
  28         int rounds = 6 + ctx->key_length / 4;
  29
  30         __aes_arm64_encrypt(ctx->key_enc, out, in, rounds);
  31 }
  32
  33 static void aes_arm64_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
  34 {
  35         struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
  36         int rounds = 6 + ctx->key_length / 4;
  37
  38         __aes_arm64_decrypt(ctx->key_dec, out, in, rounds);
  39 }
  40
  41 static struct crypto_alg aes_alg = {
  42         .cra_name                       = "aes",
  43         .cra_driver_name                = "aes-arm64",
  44         .cra_priority                   = 200,
  45         .cra_flags                      = CRYPTO_ALG_TYPE_CIPHER,
  46         .cra_blocksize                  = AES_BLOCK_SIZE,
  47         .cra_ctxsize                    = sizeof(struct crypto_aes_ctx),
  48         .cra_module                     = THIS_MODULE,
  49
  50         .cra_cipher.cia_min_keysize     = AES_MIN_KEY_SIZE,
  51         .cra_cipher.cia_max_keysize     = AES_MAX_KEY_SIZE,
  52         .cra_cipher.cia_setkey          = crypto_aes_set_key,
  53         .cra_cipher.cia_encrypt         = aes_arm64_encrypt,
  54         .cra_cipher.cia_decrypt         = aes_arm64_decrypt
  55 };
  56
  57 static int __init aes_init(void)
  58 {
  59         return crypto_register_alg(&aes_alg);
  60 }
  61
  62 static void __exit aes_fini(void)
  63 {
  64         crypto_unregister_alg(&aes_alg);
  65 }
  66
  67 module_init(aes_init);
  68 module_exit(aes_fini);
  69
  70 MODULE_DESCRIPTION("Scalar AES cipher for arm64");
  71 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
  72 MODULE_LICENSE("GPL v2");
  73 MODULE_ALIAS_CRYPTO("aes");