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 des_ecb_key_sched(des_cblock *key, des_ecb_key_schedule *ks) |
38 | { |
39 | const struct ccmode_ecb *enc = g_crypto_funcs->ccdes_ecb_encrypt; |
40 | const struct ccmode_ecb *dec = g_crypto_funcs->ccdes_ecb_decrypt; |
41 | |
42 | /* Make sure the context size for the mode fits in the one we have */ |
43 | if((enc->size>sizeof(ks->enc)) || (dec->size>sizeof(ks->dec))) |
44 | panic("%s: inconsistent size for DES-ECB context" , __FUNCTION__); |
45 | |
46 | enc->init(enc, ks->enc, CCDES_KEY_SIZE, key); |
47 | dec->init(dec, ks->dec, CCDES_KEY_SIZE, key); |
48 | |
49 | /* The old DES interface could return -1 or -2 for weak keys and wrong parity, |
50 | but this was disabled all the time, so we never fail here */ |
51 | return 0; |
52 | } |
53 | |
54 | /* Simple des - 1 block */ |
55 | void des_ecb_encrypt(des_cblock *in, des_cblock *out, des_ecb_key_schedule *ks, int enc) |
56 | { |
57 | const struct ccmode_ecb *ecb = enc ? g_crypto_funcs->ccdes_ecb_encrypt : g_crypto_funcs->ccdes_ecb_decrypt; |
58 | ccecb_ctx *ctx = enc ? ks->enc : ks->dec; |
59 | |
60 | ecb->ecb(ctx, 1, in, out); |
61 | } |
62 | |
63 | |
64 | /* Triple DES ECB - used by ipv6 (esp_core.c) */ |
65 | int des3_ecb_key_sched(des_cblock *key, des3_ecb_key_schedule *ks) |
66 | { |
67 | int rc; |
68 | const struct ccmode_ecb *enc = g_crypto_funcs->cctdes_ecb_encrypt; |
69 | const struct ccmode_ecb *dec = g_crypto_funcs->cctdes_ecb_decrypt; |
70 | |
71 | /* Make sure the context size for the mode fits in the one we have */ |
72 | if((enc->size>sizeof(ks->enc)) || (dec->size>sizeof(ks->dec))) |
73 | panic("%s: inconsistent size for 3DES-ECB context" , __FUNCTION__); |
74 | |
75 | rc = enc->init(enc, ks->enc, CCDES_KEY_SIZE*3, key); |
76 | rc |= dec->init(dec, ks->dec, CCDES_KEY_SIZE*3, key); |
77 | |
78 | return rc; |
79 | } |
80 | |
81 | /* Simple des - 1 block */ |
82 | void des3_ecb_encrypt(des_cblock *in, des_cblock *out, des3_ecb_key_schedule *ks, int enc) |
83 | { |
84 | const struct ccmode_ecb *ecb = enc ? g_crypto_funcs->cctdes_ecb_encrypt : g_crypto_funcs->cctdes_ecb_decrypt; |
85 | ccecb_ctx *ctx = enc ? ks->enc : ks->dec; |
86 | |
87 | ecb->ecb(ctx, 1, in, out); |
88 | } |
89 | |
90 | /* Raw key helper functions */ |
91 | |
92 | int des_is_weak_key(des_cblock *key) |
93 | { |
94 | return g_crypto_funcs->ccdes_key_is_weak_fn(key, CCDES_KEY_SIZE); |
95 | } |
96 | |