linux-imx

/*

 *

 * Copyright (C) 2015 Martin Willi

 * Copyright (C) 2018 Google LLC

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */

​

}

​

int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key,

               unsigned int keysize)

{

    return chacha_setkey(tfm, key, keysize, 20);

}

EXPORT_SYMBOL_GPL(crypto_chacha20_setkey);

​

int crypto_chacha_crypt(struct skcipher_request *req)

{

    struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);

    struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm);

​

    return chacha_stream_xor(req, ctx, req->iv);

}

EXPORT_SYMBOL_GPL(crypto_chacha_crypt);

​

int crypto_xchacha_crypt(struct skcipher_request *req)

        .base.cra_module    = THIS_MODULE,

​

        .min_keysize        = CHACHA_KEY_SIZE,

        .max_keysize        = CHACHA_KEY_SIZE,

        .ivsize         = XCHACHA_IV_SIZE,

        .chunksize      = CHACHA_BLOCK_SIZE,

        .setkey         = crypto_chacha20_setkey,

        .encrypt        = crypto_xchacha_crypt,

        .decrypt        = crypto_xchacha_crypt,

    }

};

​

static int __init chacha_generic_mod_init(void)

{

    return crypto_register_skciphers(algs, ARRAY_SIZE(algs));

}

​

static void __exit chacha_generic_mod_fini(void)

{

module_exit(chacha_generic_mod_fini);

​

MODULE_LICENSE("GPL");

MODULE_AUTHOR("Martin Willi <martin@strongswan.org>");

MODULE_DESCRIPTION("ChaCha and XChaCha stream ciphers (generic)");

MODULE_ALIAS_CRYPTO("chacha20");

MODULE_ALIAS_CRYPTO("chacha20-generic");

MODULE_ALIAS_CRYPTO("xchacha20");

MODULE_ALIAS_CRYPTO("xchacha20-generic");