projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 81edb426 AB |
2 | /* |
| 3 | * Scalar AES core transform | |
| 4 | * | |
| 5 | * Copyright (C) 2017 Linaro Ltd. | |
| 6 | * Author: Ard Biesheuvel <ard.biesheuvel@linaro.org> | |
| 81edb426 AB |
7 | */ |
| 8 | ||
| 9 | #include <crypto/aes.h> | |
| 10 | #include <linux/crypto.h> | |
| 11 | #include <linux/module.h> | |
| 12 | ||
| 13 | asmlinkage void __aes_arm_encrypt(u32 *rk, int rounds, const u8 *in, u8 *out); | |
| 14 | EXPORT_SYMBOL(__aes_arm_encrypt); | |
| 15 | ||
| 16 | asmlinkage void __aes_arm_decrypt(u32 *rk, int rounds, const u8 *in, u8 *out); | |
| 17 | EXPORT_SYMBOL(__aes_arm_decrypt); | |
| 18 | ||
| 19 | static void aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) | |
| 20 | { | |
| 21 | struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm); | |
| 22 | int rounds = 6 + ctx->key_length / 4; | |
| 23 | ||
| 24 | __aes_arm_encrypt(ctx->key_enc, rounds, in, out); | |
| 25 | } | |
| 26 | ||
| 27 | static void aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) | |
| 28 | { | |
| 29 | struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm); | |
| 30 | int rounds = 6 + ctx->key_length / 4; | |
| 31 | ||
| 32 | __aes_arm_decrypt(ctx->key_dec, rounds, in, out); | |
| 33 | } | |
| 34 | ||
| 35 | static struct crypto_alg aes_alg = { | |
| 36 | .cra_name = "aes", | |
| 37 | .cra_driver_name = "aes-arm", | |
| 38 | .cra_priority = 200, | |
| 39 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, | |
| 40 | .cra_blocksize = AES_BLOCK_SIZE, | |
| 41 | .cra_ctxsize = sizeof(struct crypto_aes_ctx), | |
| 42 | .cra_module = THIS_MODULE, | |
| 43 | ||
| 44 | .cra_cipher.cia_min_keysize = AES_MIN_KEY_SIZE, | |
| 45 | .cra_cipher.cia_max_keysize = AES_MAX_KEY_SIZE, | |
| 46 | .cra_cipher.cia_setkey = crypto_aes_set_key, | |
| 47 | .cra_cipher.cia_encrypt = aes_encrypt, | |
| 48 | .cra_cipher.cia_decrypt = aes_decrypt, | |
| 49 | ||
| 50 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
| 51 | .cra_alignmask = 3, | |
| 52 | #endif | |
| 53 | }; | |
| 54 | ||
| 55 | static int __init aes_init(void) | |
| 56 | { | |
| 57 | return crypto_register_alg(&aes_alg); | |
| 58 | } | |
| 59 | ||
| 60 | static void __exit aes_fini(void) | |
| 61 | { | |
| 62 | crypto_unregister_alg(&aes_alg); | |
| 63 | } | |
| 64 | ||
| 65 | module_init(aes_init); | |
| 66 | module_exit(aes_fini); | |
| 67 | ||
| 68 | MODULE_DESCRIPTION("Scalar AES cipher for ARM"); | |
| 69 | MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); | |
| 70 | MODULE_LICENSE("GPL v2"); | |
| 71 | MODULE_ALIAS_CRYPTO("aes"); |