1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * DES & Triple DES EDE Cipher Algorithms. |
4 | */ |
5 | |
6 | #ifndef __CRYPTO_DES_H |
7 | #define __CRYPTO_DES_H |
8 | |
9 | #include <linux/types.h> |
10 | |
11 | #define DES_KEY_SIZE 8 |
12 | #define DES_EXPKEY_WORDS 32 |
13 | #define DES_BLOCK_SIZE 8 |
14 | |
15 | #define DES3_EDE_KEY_SIZE (3 * DES_KEY_SIZE) |
16 | #define DES3_EDE_EXPKEY_WORDS (3 * DES_EXPKEY_WORDS) |
17 | #define DES3_EDE_BLOCK_SIZE DES_BLOCK_SIZE |
18 | |
19 | struct des_ctx { |
20 | u32 expkey[DES_EXPKEY_WORDS]; |
21 | }; |
22 | |
23 | struct des3_ede_ctx { |
24 | u32 expkey[DES3_EDE_EXPKEY_WORDS]; |
25 | }; |
26 | |
27 | void des_encrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src); |
28 | void des_decrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src); |
29 | |
30 | void des3_ede_encrypt(const struct des3_ede_ctx *dctx, u8 *dst, const u8 *src); |
31 | void des3_ede_decrypt(const struct des3_ede_ctx *dctx, u8 *dst, const u8 *src); |
32 | |
33 | /** |
34 | * des_expand_key - Expand a DES input key into a key schedule |
35 | * @ctx: the key schedule |
36 | * @key: buffer containing the input key |
37 | * @len: size of the buffer contents |
38 | * |
39 | * Returns 0 on success, -EINVAL if the input key is rejected and -ENOKEY if |
40 | * the key is accepted but has been found to be weak. |
41 | */ |
42 | int des_expand_key(struct des_ctx *ctx, const u8 *key, unsigned int keylen); |
43 | |
44 | /** |
45 | * des3_ede_expand_key - Expand a triple DES input key into a key schedule |
46 | * @ctx: the key schedule |
47 | * @key: buffer containing the input key |
48 | * @len: size of the buffer contents |
49 | * |
50 | * Returns 0 on success, -EINVAL if the input key is rejected and -ENOKEY if |
51 | * the key is accepted but has been found to be weak. Note that weak keys will |
52 | * be rejected (and -EINVAL will be returned) when running in FIPS mode. |
53 | */ |
54 | int des3_ede_expand_key(struct des3_ede_ctx *ctx, const u8 *key, |
55 | unsigned int keylen); |
56 | |
57 | #endif /* __CRYPTO_DES_H */ |
58 | |