Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
cfa2b54e | 2 | /* |
1da177e4 LT |
3 | * Cryptographic API |
4 | * | |
5 | * ARC4 Cipher Algorithm | |
6 | * | |
7 | * Jon Oberheide <jon@oberheide.org> | |
1da177e4 | 8 | */ |
ce6dd368 | 9 | |
bd30cf53 | 10 | #include <crypto/arc4.h> |
426bcb50 EB |
11 | #include <crypto/internal/skcipher.h> |
12 | #include <linux/init.h> | |
9ace6771 | 13 | #include <linux/kernel.h> |
426bcb50 | 14 | #include <linux/module.h> |
9ace6771 | 15 | #include <linux/sched.h> |
1da177e4 | 16 | |
9a91792d | 17 | static int crypto_arc4_setkey(struct crypto_lskcipher *tfm, const u8 *in_key, |
611a23c2 | 18 | unsigned int key_len) |
426bcb50 | 19 | { |
9a91792d | 20 | struct arc4_ctx *ctx = crypto_lskcipher_ctx(tfm); |
1da177e4 | 21 | |
dc51f257 | 22 | return arc4_setkey(ctx, in_key, key_len); |
ce6dd368 JK |
23 | } |
24 | ||
9a91792d HX |
25 | static int crypto_arc4_crypt(struct crypto_lskcipher *tfm, const u8 *src, |
26 | u8 *dst, unsigned nbytes, u8 *iv, bool final) | |
ce6dd368 | 27 | { |
9a91792d | 28 | struct arc4_ctx *ctx = crypto_lskcipher_ctx(tfm); |
ce6dd368 | 29 | |
9a91792d HX |
30 | arc4_crypt(ctx, dst, src, nbytes); |
31 | return 0; | |
ce6dd368 JK |
32 | } |
33 | ||
9a91792d | 34 | static int crypto_arc4_init(struct crypto_lskcipher *tfm) |
9ace6771 AB |
35 | { |
36 | pr_warn_ratelimited("\"%s\" (%ld) uses obsolete ecb(arc4) skcipher\n", | |
37 | current->comm, (unsigned long)current->pid); | |
38 | ||
39 | return 0; | |
40 | } | |
41 | ||
9a91792d HX |
42 | static struct lskcipher_alg arc4_alg = { |
43 | .co.base.cra_name = "arc4", | |
44 | .co.base.cra_driver_name = "arc4-generic", | |
45 | .co.base.cra_priority = 100, | |
46 | .co.base.cra_blocksize = ARC4_BLOCK_SIZE, | |
47 | .co.base.cra_ctxsize = sizeof(struct arc4_ctx), | |
48 | .co.base.cra_module = THIS_MODULE, | |
49 | .co.min_keysize = ARC4_MIN_KEY_SIZE, | |
50 | .co.max_keysize = ARC4_MAX_KEY_SIZE, | |
51 | .setkey = crypto_arc4_setkey, | |
52 | .encrypt = crypto_arc4_crypt, | |
53 | .decrypt = crypto_arc4_crypt, | |
54 | .init = crypto_arc4_init, | |
426bcb50 | 55 | }; |
1da177e4 LT |
56 | |
57 | static int __init arc4_init(void) | |
58 | { | |
9a91792d | 59 | return crypto_register_lskcipher(&arc4_alg); |
1da177e4 LT |
60 | } |
61 | ||
1da177e4 LT |
62 | static void __exit arc4_exit(void) |
63 | { | |
9a91792d | 64 | crypto_unregister_lskcipher(&arc4_alg); |
1da177e4 LT |
65 | } |
66 | ||
c4741b23 | 67 | subsys_initcall(arc4_init); |
1da177e4 LT |
68 | module_exit(arc4_exit); |
69 | ||
70 | MODULE_LICENSE("GPL"); | |
71 | MODULE_DESCRIPTION("ARC4 Cipher Algorithm"); | |
72 | MODULE_AUTHOR("Jon Oberheide <jon@oberheide.org>"); | |
611a23c2 | 73 | MODULE_ALIAS_CRYPTO("ecb(arc4)"); |