aes_glue.c

Go to the documentation of this file.

/*
 * Glue Code for the asm optimized version of the AES Cipher Algorithm
 *
 */

#include <linux/module.h>
#include <crypto/aes.h>
#include <asm/crypto/aes.h>

asmlinkage void aes_enc_blk(struct crypto_aes_ctx *ctx, u8 *out, const u8 *in);
asmlinkage void aes_dec_blk(struct crypto_aes_ctx *ctx, u8 *out, const u8 *in);

void crypto_aes_encrypt_x86(struct crypto_aes_ctx *ctx, u8 *dst, const u8 *src)
{
    aes_enc_blk(ctx, dst, src);
}
EXPORT_SYMBOL_GPL(crypto_aes_encrypt_x86);

void crypto_aes_decrypt_x86(struct crypto_aes_ctx *ctx, u8 *dst, const u8 *src)
{
    aes_dec_blk(ctx, dst, src);
}
EXPORT_SYMBOL_GPL(crypto_aes_decrypt_x86);

static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
    aes_enc_blk(crypto_tfm_ctx(tfm), dst, src);
}

static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
    aes_dec_blk(crypto_tfm_ctx(tfm), dst, src);
}

static struct crypto_alg aes_alg = {
    .cra_name       = "aes",
    .cra_driver_name    = "aes-asm",
    .cra_priority       = 200,
    .cra_flags      = CRYPTO_ALG_TYPE_CIPHER,
    .cra_blocksize      = AES_BLOCK_SIZE,
    .cra_ctxsize        = sizeof(struct crypto_aes_ctx),
    .cra_module     = THIS_MODULE,
    .cra_u  = {
        .cipher = {
            .cia_min_keysize    = AES_MIN_KEY_SIZE,
            .cia_max_keysize    = AES_MAX_KEY_SIZE,
            .cia_setkey     = crypto_aes_set_key,
            .cia_encrypt        = aes_encrypt,
            .cia_decrypt        = aes_decrypt
        }
    }
};

static int __init aes_init(void)
{
    return crypto_register_alg(&aes_alg);
}

static void __exit aes_fini(void)
{
    crypto_unregister_alg(&aes_alg);
}

module_init(aes_init);
module_exit(aes_fini);

MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, asm optimized");
MODULE_LICENSE("GPL");
MODULE_ALIAS("aes");
MODULE_ALIAS("aes-asm");