1 | /* |
2 | * Copyright (c) 2010, Oracle America, Inc. |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions are |
6 | * met: |
7 | * |
8 | * * Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * * Redistributions in binary form must reproduce the above |
11 | * copyright notice, this list of conditions and the following |
12 | * disclaimer in the documentation and/or other materials |
13 | * provided with the distribution. |
14 | * * Neither the name of the "Oracle America, Inc." nor the names of its |
15 | * contributors may be used to endorse or promote products derived |
16 | * from this software without specific prior written permission. |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
19 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
20 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
21 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
22 | * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
23 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
25 | * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
27 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
28 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
29 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #if 0 |
33 | #ident "@(#)xcrypt.c 1.11 94/08/23 SMI" |
34 | #endif |
35 | |
36 | #if !defined(lint) && defined(SCCSIDS) |
37 | static char sccsid[] = "@(#)xcrypt.c 1.3 89/03/24 Copyr 1986 Sun Micro" ; |
38 | #endif |
39 | |
40 | /* |
41 | * xcrypt.c: Hex encryption/decryption and utility routines |
42 | */ |
43 | |
44 | #include <ctype.h> |
45 | #include <stdio.h> |
46 | #include <stdlib.h> |
47 | #include <string.h> |
48 | #include <sys/types.h> |
49 | #include <rpc/des_crypt.h> |
50 | #include <shlib-compat.h> |
51 | |
52 | static const char hex[16] = |
53 | { |
54 | '0', '1', '2', '3', '4', '5', '6', '7', |
55 | '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', |
56 | }; |
57 | |
58 | |
59 | #ifdef _LIBC |
60 | # define hexval(c) \ |
61 | (c >= '0' && c <= '9' \ |
62 | ? c - '0' \ |
63 | : ({ int upp = toupper (c); \ |
64 | upp >= 'A' && upp <= 'Z' ? upp - 'A' + 10 : -1; })) |
65 | #else |
66 | static char hexval (char) internal_function; |
67 | #endif |
68 | |
69 | static void hex2bin (int, char *, char *) internal_function; |
70 | static void bin2hex (int, unsigned char *, char *) internal_function; |
71 | void passwd2des_internal (char *pw, char *key); |
72 | #ifdef _LIBC |
73 | libc_hidden_proto (passwd2des_internal) |
74 | #endif |
75 | |
76 | /* |
77 | * Turn password into DES key |
78 | */ |
79 | void |
80 | passwd2des_internal (char *pw, char *key) |
81 | { |
82 | int i; |
83 | |
84 | memset (key, 0, 8); |
85 | for (i = 0; *pw && i < 8; ++i) |
86 | key[i] ^= *pw++ << 1; |
87 | |
88 | des_setparity (key); |
89 | } |
90 | |
91 | #ifdef _LIBC |
92 | libc_hidden_def (passwd2des_internal) |
93 | libc_sunrpc_symbol(passwd2des_internal, passwd2des, GLIBC_2_1) |
94 | #else |
95 | void passwd2des (char *pw, char *key) |
96 | { |
97 | return passwd2des_internal (pw, key); |
98 | } |
99 | #endif |
100 | |
101 | /* |
102 | * Encrypt a secret key given passwd |
103 | * The secret key is passed and returned in hex notation. |
104 | * Its length must be a multiple of 16 hex digits (64 bits). |
105 | */ |
106 | int |
107 | xencrypt (char *secret, char *passwd) |
108 | { |
109 | char key[8]; |
110 | char ivec[8]; |
111 | char *buf; |
112 | int err; |
113 | int len; |
114 | |
115 | len = strlen (secret) / 2; |
116 | buf = malloc ((unsigned) len); |
117 | hex2bin (len, secret, buf); |
118 | passwd2des_internal (passwd, key); |
119 | memset (ivec, 0, 8); |
120 | |
121 | err = cbc_crypt (key, buf, len, DES_ENCRYPT | DES_HW, ivec); |
122 | if (DES_FAILED (err)) |
123 | { |
124 | free (buf); |
125 | return 0; |
126 | } |
127 | bin2hex (len, (unsigned char *) buf, secret); |
128 | free (buf); |
129 | return 1; |
130 | } |
131 | libc_hidden_nolink_sunrpc (xencrypt, GLIBC_2_0) |
132 | |
133 | /* |
134 | * Decrypt secret key using passwd |
135 | * The secret key is passed and returned in hex notation. |
136 | * Once again, the length is a multiple of 16 hex digits |
137 | */ |
138 | int |
139 | xdecrypt (char *secret, char *passwd) |
140 | { |
141 | char key[8]; |
142 | char ivec[8]; |
143 | char *buf; |
144 | int err; |
145 | int len; |
146 | |
147 | len = strlen (secret) / 2; |
148 | buf = malloc ((unsigned) len); |
149 | |
150 | hex2bin (len, secret, buf); |
151 | passwd2des_internal (passwd, key); |
152 | memset (ivec, 0, 8); |
153 | |
154 | err = cbc_crypt (key, buf, len, DES_DECRYPT | DES_HW, ivec); |
155 | if (DES_FAILED (err)) |
156 | { |
157 | free (buf); |
158 | return 0; |
159 | } |
160 | bin2hex (len, (unsigned char *) buf, secret); |
161 | free (buf); |
162 | return 1; |
163 | } |
164 | #ifdef EXPORT_RPC_SYMBOLS |
165 | libc_hidden_def (xdecrypt) |
166 | #else |
167 | libc_hidden_nolink_sunrpc (xdecrypt, GLIBC_2_1) |
168 | #endif |
169 | |
170 | /* |
171 | * Hex to binary conversion |
172 | */ |
173 | static void |
174 | internal_function |
175 | hex2bin (int len, char *hexnum, char *binnum) |
176 | { |
177 | int i; |
178 | |
179 | for (i = 0; i < len; i++) |
180 | *binnum++ = 16 * hexval (hexnum[2 * i]) + hexval (hexnum[2 * i + 1]); |
181 | } |
182 | |
183 | /* |
184 | * Binary to hex conversion |
185 | */ |
186 | static void |
187 | internal_function |
188 | bin2hex (int len, unsigned char *binnum, char *hexnum) |
189 | { |
190 | int i; |
191 | unsigned val; |
192 | |
193 | for (i = 0; i < len; i++) |
194 | { |
195 | val = binnum[i]; |
196 | hexnum[i * 2] = hex[val >> 4]; |
197 | hexnum[i * 2 + 1] = hex[val & 0xf]; |
198 | } |
199 | hexnum[len * 2] = 0; |
200 | } |
201 | |
202 | #ifndef _LIBC |
203 | static char |
204 | hexval (char c) |
205 | { |
206 | if (c >= '0' && c <= '9') |
207 | return (c - '0'); |
208 | else if (c >= 'a' && c <= 'z') |
209 | return (c - 'a' + 10); |
210 | else if (c >= 'A' && c <= 'Z') |
211 | return (c - 'A' + 10); |
212 | else |
213 | return -1; |
214 | } |
215 | #endif |
216 | |