1 | /* |
2 | * Copyright (c) 2012 Apple Computer, Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | |
29 | |
30 | #include <libkern/crypto/crypto_internal.h> |
31 | #include <libkern/libkern.h> |
32 | #include <kern/debug.h> |
33 | #include <libkern/crypto/des.h> |
34 | #include <corecrypto/ccmode.h> |
35 | |
36 | /* Single DES ECB - used by ipv6 (esp_core.c) */ |
37 | int |
38 | des_ecb_key_sched(des_cblock *key, des_ecb_key_schedule *ks) |
39 | { |
40 | const struct ccmode_ecb *enc = g_crypto_funcs->ccdes_ecb_encrypt; |
41 | const struct ccmode_ecb *dec = g_crypto_funcs->ccdes_ecb_decrypt; |
42 | |
43 | /* Make sure the context size for the mode fits in the one we have */ |
44 | if ((enc->size > sizeof(ks->enc)) || (dec->size > sizeof(ks->dec))) { |
45 | panic("%s: inconsistent size for DES-ECB context" , __FUNCTION__); |
46 | } |
47 | |
48 | int rc = enc->init(enc, ks->enc, CCDES_KEY_SIZE, key); |
49 | if (rc) { |
50 | return rc; |
51 | } |
52 | |
53 | return dec->init(dec, ks->dec, CCDES_KEY_SIZE, key); |
54 | } |
55 | |
56 | /* Simple des - 1 block */ |
57 | int |
58 | des_ecb_encrypt(des_cblock *in, des_cblock *out, des_ecb_key_schedule *ks, int enc) |
59 | { |
60 | const struct ccmode_ecb *ecb = enc ? g_crypto_funcs->ccdes_ecb_encrypt : g_crypto_funcs->ccdes_ecb_decrypt; |
61 | ccecb_ctx *ctx = enc ? ks->enc : ks->dec; |
62 | |
63 | return ecb->ecb(ctx, 1, in, out); |
64 | } |
65 | |
66 | |
67 | /* Triple DES ECB - used by ipv6 (esp_core.c) */ |
68 | int |
69 | des3_ecb_key_sched(des_cblock *key, des3_ecb_key_schedule *ks) |
70 | { |
71 | const struct ccmode_ecb *enc = g_crypto_funcs->cctdes_ecb_encrypt; |
72 | const struct ccmode_ecb *dec = g_crypto_funcs->cctdes_ecb_decrypt; |
73 | |
74 | /* Make sure the context size for the mode fits in the one we have */ |
75 | if ((enc->size > sizeof(ks->enc)) || (dec->size > sizeof(ks->dec))) { |
76 | panic("%s: inconsistent size for 3DES-ECB context" , __FUNCTION__); |
77 | } |
78 | |
79 | int rc = enc->init(enc, ks->enc, CCDES_KEY_SIZE * 3, key); |
80 | if (rc) { |
81 | return rc; |
82 | } |
83 | |
84 | return dec->init(dec, ks->dec, CCDES_KEY_SIZE * 3, key); |
85 | } |
86 | |
87 | /* Simple des - 1 block */ |
88 | int |
89 | des3_ecb_encrypt(des_cblock *in, des_cblock *out, des3_ecb_key_schedule *ks, int enc) |
90 | { |
91 | const struct ccmode_ecb *ecb = enc ? g_crypto_funcs->cctdes_ecb_encrypt : g_crypto_funcs->cctdes_ecb_decrypt; |
92 | ccecb_ctx *ctx = enc ? ks->enc : ks->dec; |
93 | |
94 | return ecb->ecb(ctx, 1, in, out); |
95 | } |
96 | |
97 | /* Raw key helper functions */ |
98 | |
99 | int |
100 | des_is_weak_key(des_cblock *key) |
101 | { |
102 | return g_crypto_funcs->ccdes_key_is_weak_fn(key, CCDES_KEY_SIZE); |
103 | } |
104 | |