3 ** OpenBSD replacement routines
5 ** Damien Miller <djm@ibs.com.au>
7 ** Copyright 1999 Damien Miller
8 ** Copyright 1999 Internet Business Solutions
10 ** Permission is hereby granted, free of charge, to any person
11 ** obtaining a copy of this software and associated documentation
12 ** files (the "Software"), to deal in the Software without
13 ** restriction, including without limitation the rights to use, copy,
14 ** modify, merge, publish, distribute, sublicense, and/or sell copies
15 ** of the Software, and to permit persons to whom the Software is
16 ** furnished to do so, subject to the following conditions:
18 ** The above copyright notice and this permission notice shall be
19 ** included in all copies or substantial portions of the Software.
21 ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
22 ** KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
23 ** WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
24 ** AND NONINFRINGEMENT. IN NO EVENT SHALL DAMIEN MILLER OR INTERNET
25 ** BUSINESS SOLUTIONS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26 ** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
27 ** ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
28 ** OR OTHER DEALINGS IN THE SOFTWARE.
30 ** Except as contained in this notice, the name of Internet Business
31 ** Solutions shall not be used in advertising or otherwise to promote
32 ** the sale, use or other dealings in this Software without prior
33 ** written authorization from Internet Business Solutions.
45 #include <sys/types.h>
57 #ifndef HAVE_ARC4RANDOM
66 void rc4_key(rc4_t *r, unsigned char *key, int len);
67 void rc4_getbytes(rc4_t *r, unsigned char *buffer, int len);
69 static rc4_t *rc4 = NULL;
71 void rc4_key(rc4_t *r, unsigned char *key, int len)
75 for(r->i = 0; r->i < 256; r->i++)
79 for(r->i = 0; r->i < 256; r->i++)
81 r->j = (r->j + r->s[r->i] + key[r->i % len]) % 256;
83 r->s[r->i] = r->s[r->j];
89 void rc4_getbytes(rc4_t *r, unsigned char *buffer, int len)
97 r->i = (r->i + 1) % 256;
98 r->j = (r->j + r->s[r->i]) % 256;
100 r->s[r->i] = r->s[r->j];
103 t = (r->s[r->i] + r->s[r->j]) % 256;
110 unsigned int arc4random(void)
117 rc4_getbytes(rc4, (unsigned char *)&r, sizeof(r));
122 void arc4random_stir(void)
124 unsigned char rand_buf[32];
127 rc4 = xmalloc(sizeof(*rc4));
129 get_random_bytes(rand_buf, sizeof(rand_buf));
130 rc4_key(rc4, rand_buf, sizeof(rand_buf));
131 memset(rand_buf, 0, sizeof(rand_buf));
133 #endif /* !HAVE_ARC4RANDOM */
135 #ifndef HAVE_SETPROCTITLE
136 void setproctitle(const char *fmt, ...)
140 #endif /* !HAVE_SETPROCTITLE */
143 int setenv(const char *name, const char *value, int overwrite)
148 /* Don't overwrite existing env. var if overwrite is 0 */
149 if (!overwrite && (getenv(name) != NULL))
152 env_string = xmalloc(strlen(name) + strlen(value) + 2);
153 sprintf(env_string, "%s=%s", name, value);
155 result = putenv(env_string);
161 #endif /* !HAVE_SETENV */
163 #ifndef HAVE_SETLOGIN
164 int setlogin(const char *name)
168 #endif /* !HAVE_SETLOGIN */
171 int innetgr(const char *netgroup, const char *host,
172 const char *user, const char *domain)
176 #endif /* HAVE_INNETGR */
178 #if !defined(HAVE_SETEUID) && defined(HAVE_SETREUID)
179 int seteuid(uid_t euid)
181 return(setreuid(-1,euid));
183 #endif /* !defined(HAVE_SETEUID) && defined(HAVE_SETREUID) */