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cb636bb2 | 1 | /* |
a7ab6ec8 UD |
2 | * des_crypt.c, DES encryption library routines |
3 | * Copyright (c) 2010, Oracle America, Inc. | |
a3d731d3 | 4 | * |
a7ab6ec8 UD |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions are | |
7 | * met: | |
a3d731d3 | 8 | * |
a7ab6ec8 UD |
9 | * * Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. | |
11 | * * Redistributions in binary form must reproduce the above | |
12 | * copyright notice, this list of conditions and the following | |
13 | * disclaimer in the documentation and/or other materials | |
14 | * provided with the distribution. | |
15 | * * Neither the name of the "Oracle America, Inc." nor the names of its | |
16 | * contributors may be used to endorse or promote products derived | |
17 | * from this software without specific prior written permission. | |
a3d731d3 | 18 | * |
a7ab6ec8 UD |
19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
20 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
21 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
22 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
23 | * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
24 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE | |
26 | * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
28 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
29 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
800d775e UD |
31 | */ |
32 | ||
33 | #include <sys/types.h> | |
34 | #include <rpc/des_crypt.h> | |
82f43dd2 | 35 | #include <shlib-compat.h> |
800d775e UD |
36 | #include "des.h" |
37 | ||
38 | extern int _des_crypt (char *, unsigned, struct desparams *); | |
39 | ||
40 | /* | |
41 | * Copy 8 bytes | |
42 | */ | |
43 | #define COPY8(src, dst) { \ | |
44 | register char *a = (char *) dst; \ | |
45 | register char *b = (char *) src; \ | |
46 | *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ | |
47 | *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ | |
48 | } | |
49 | ||
50 | /* | |
51 | * Copy multiple of 8 bytes | |
52 | */ | |
53 | #define DESCOPY(src, dst, len) { \ | |
54 | register char *a = (char *) dst; \ | |
55 | register char *b = (char *) src; \ | |
56 | register int i; \ | |
57 | for (i = (int) len; i > 0; i -= 8) { \ | |
58 | *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ | |
59 | *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ | |
60 | } \ | |
61 | } | |
62 | ||
63 | /* | |
64 | * Common code to cbc_crypt() & ecb_crypt() | |
65 | */ | |
66 | static int | |
67 | common_crypt (char *key, char *buf, register unsigned len, | |
68 | unsigned mode, register struct desparams *desp) | |
69 | { | |
70 | register int desdev; | |
71 | ||
72 | if ((len % 8) != 0 || len > DES_MAXDATA) | |
73 | return DESERR_BADPARAM; | |
74 | ||
75 | desp->des_dir = | |
76 | ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT; | |
77 | ||
78 | desdev = mode & DES_DEVMASK; | |
79 | COPY8 (key, desp->des_key); | |
a3d731d3 | 80 | /* |
800d775e UD |
81 | * software |
82 | */ | |
83 | if (!_des_crypt (buf, len, desp)) | |
84 | return DESERR_HWERROR; | |
85 | ||
86 | return desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE; | |
87 | } | |
88 | ||
b10a0acc ZW |
89 | /* Note: these cannot be excluded from the build yet, because they are |
90 | still used internally. */ | |
91 | ||
800d775e UD |
92 | /* |
93 | * CBC mode encryption | |
94 | */ | |
95 | int | |
96 | cbc_crypt (char *key, char *buf, unsigned int len, unsigned int mode, | |
97 | char *ivec) | |
98 | { | |
99 | int err; | |
100 | struct desparams dp; | |
101 | ||
102 | dp.des_mode = CBC; | |
103 | COPY8 (ivec, dp.des_ivec); | |
104 | err = common_crypt (key, buf, len, mode, &dp); | |
105 | COPY8 (dp.des_ivec, ivec); | |
106 | return err; | |
107 | } | |
b10a0acc | 108 | hidden_nolink (cbc_crypt, libc, GLIBC_2_1) |
800d775e UD |
109 | |
110 | /* | |
111 | * ECB mode encryption | |
112 | */ | |
113 | int | |
114 | ecb_crypt (char *key, char *buf, unsigned int len, unsigned int mode) | |
115 | { | |
116 | struct desparams dp; | |
117 | ||
118 | dp.des_mode = ECB; | |
119 | return common_crypt (key, buf, len, mode, &dp); | |
120 | } | |
b10a0acc | 121 | hidden_nolink (ecb_crypt, libc, GLIBC_2_1) |