Commit | Line | Data |
---|---|---|
f0be44f4 DM |
1 | /* |
2 | * Glue Code for the asm optimized version of the AES Cipher Algorithm | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/crypto.h> | |
7 | #include <crypto/aes.h> | |
8 | ||
5ce26f3b | 9 | #include "aes_glue.h" |
f0be44f4 | 10 | |
5ce26f3b AB |
11 | EXPORT_SYMBOL(AES_encrypt); |
12 | EXPORT_SYMBOL(AES_decrypt); | |
13 | EXPORT_SYMBOL(private_AES_set_encrypt_key); | |
14 | EXPORT_SYMBOL(private_AES_set_decrypt_key); | |
f0be44f4 DM |
15 | |
16 | static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) | |
17 | { | |
18 | struct AES_CTX *ctx = crypto_tfm_ctx(tfm); | |
19 | AES_encrypt(src, dst, &ctx->enc_key); | |
20 | } | |
21 | ||
22 | static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) | |
23 | { | |
24 | struct AES_CTX *ctx = crypto_tfm_ctx(tfm); | |
25 | AES_decrypt(src, dst, &ctx->dec_key); | |
26 | } | |
27 | ||
28 | static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key, | |
29 | unsigned int key_len) | |
30 | { | |
31 | struct AES_CTX *ctx = crypto_tfm_ctx(tfm); | |
32 | ||
33 | switch (key_len) { | |
34 | case AES_KEYSIZE_128: | |
35 | key_len = 128; | |
36 | break; | |
37 | case AES_KEYSIZE_192: | |
38 | key_len = 192; | |
39 | break; | |
40 | case AES_KEYSIZE_256: | |
41 | key_len = 256; | |
42 | break; | |
43 | default: | |
44 | tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; | |
45 | return -EINVAL; | |
46 | } | |
47 | ||
48 | if (private_AES_set_encrypt_key(in_key, key_len, &ctx->enc_key) == -1) { | |
49 | tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; | |
50 | return -EINVAL; | |
51 | } | |
52 | /* private_AES_set_decrypt_key expects an encryption key as input */ | |
53 | ctx->dec_key = ctx->enc_key; | |
54 | if (private_AES_set_decrypt_key(in_key, key_len, &ctx->dec_key) == -1) { | |
55 | tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; | |
56 | return -EINVAL; | |
57 | } | |
58 | return 0; | |
59 | } | |
60 | ||
61 | static struct crypto_alg aes_alg = { | |
62 | .cra_name = "aes", | |
63 | .cra_driver_name = "aes-asm", | |
64 | .cra_priority = 200, | |
65 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, | |
66 | .cra_blocksize = AES_BLOCK_SIZE, | |
67 | .cra_ctxsize = sizeof(struct AES_CTX), | |
68 | .cra_module = THIS_MODULE, | |
69 | .cra_list = LIST_HEAD_INIT(aes_alg.cra_list), | |
70 | .cra_u = { | |
71 | .cipher = { | |
72 | .cia_min_keysize = AES_MIN_KEY_SIZE, | |
73 | .cia_max_keysize = AES_MAX_KEY_SIZE, | |
5ce26f3b | 74 | .cia_setkey = aes_set_key, |
f0be44f4 DM |
75 | .cia_encrypt = aes_encrypt, |
76 | .cia_decrypt = aes_decrypt | |
77 | } | |
78 | } | |
79 | }; | |
80 | ||
81 | static int __init aes_init(void) | |
82 | { | |
83 | return crypto_register_alg(&aes_alg); | |
84 | } | |
85 | ||
86 | static void __exit aes_fini(void) | |
87 | { | |
88 | crypto_unregister_alg(&aes_alg); | |
89 | } | |
90 | ||
91 | module_init(aes_init); | |
92 | module_exit(aes_fini); | |
93 | ||
94 | MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm (ASM)"); | |
95 | MODULE_LICENSE("GPL"); | |
5d26a105 KC |
96 | MODULE_ALIAS_CRYPTO("aes"); |
97 | MODULE_ALIAS_CRYPTO("aes-asm"); | |
f0be44f4 | 98 | MODULE_AUTHOR("David McCullough <ucdevel@gmail.com>"); |