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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /crypto/arc4.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'crypto/arc4.c')
-rw-r--r-- | crypto/arc4.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/crypto/arc4.c b/crypto/arc4.c new file mode 100644 index 0000000000..3254dcc343 --- /dev/null +++ b/crypto/arc4.c @@ -0,0 +1,87 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Cryptographic API + * + * ARC4 Cipher Algorithm + * + * Jon Oberheide <jon@oberheide.org> + */ + +#include <crypto/algapi.h> +#include <crypto/arc4.h> +#include <crypto/internal/skcipher.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/sched.h> + +static int crypto_arc4_setkey(struct crypto_skcipher *tfm, const u8 *in_key, + unsigned int key_len) +{ + struct arc4_ctx *ctx = crypto_skcipher_ctx(tfm); + + return arc4_setkey(ctx, in_key, key_len); +} + +static int crypto_arc4_crypt(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + struct arc4_ctx *ctx = crypto_skcipher_ctx(tfm); + struct skcipher_walk walk; + int err; + + err = skcipher_walk_virt(&walk, req, false); + + while (walk.nbytes > 0) { + arc4_crypt(ctx, walk.dst.virt.addr, walk.src.virt.addr, + walk.nbytes); + err = skcipher_walk_done(&walk, 0); + } + + return err; +} + +static int crypto_arc4_init(struct crypto_skcipher *tfm) +{ + pr_warn_ratelimited("\"%s\" (%ld) uses obsolete ecb(arc4) skcipher\n", + current->comm, (unsigned long)current->pid); + + return 0; +} + +static struct skcipher_alg arc4_alg = { + /* + * For legacy reasons, this is named "ecb(arc4)", not "arc4". + * Nevertheless it's actually a stream cipher, not a block cipher. + */ + .base.cra_name = "ecb(arc4)", + .base.cra_driver_name = "ecb(arc4)-generic", + .base.cra_priority = 100, + .base.cra_blocksize = ARC4_BLOCK_SIZE, + .base.cra_ctxsize = sizeof(struct arc4_ctx), + .base.cra_module = THIS_MODULE, + .min_keysize = ARC4_MIN_KEY_SIZE, + .max_keysize = ARC4_MAX_KEY_SIZE, + .setkey = crypto_arc4_setkey, + .encrypt = crypto_arc4_crypt, + .decrypt = crypto_arc4_crypt, + .init = crypto_arc4_init, +}; + +static int __init arc4_init(void) +{ + return crypto_register_skcipher(&arc4_alg); +} + +static void __exit arc4_exit(void) +{ + crypto_unregister_skcipher(&arc4_alg); +} + +subsys_initcall(arc4_init); +module_exit(arc4_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("ARC4 Cipher Algorithm"); +MODULE_AUTHOR("Jon Oberheide <jon@oberheide.org>"); +MODULE_ALIAS_CRYPTO("ecb(arc4)"); |