Annotation of src/usr.bin/passwd/local_passwd.c, Revision 1.1
1.1 ! deraadt 1: /*-
! 2: * Copyright (c) 1990 The Regents of the University of California.
! 3: * All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. All advertising materials mentioning features or use of this software
! 14: * must display the following acknowledgement:
! 15: * This product includes software developed by the University of
! 16: * California, Berkeley and its contributors.
! 17: * 4. Neither the name of the University nor the names of its contributors
! 18: * may be used to endorse or promote products derived from this software
! 19: * without specific prior written permission.
! 20: *
! 21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 31: * SUCH DAMAGE.
! 32: */
! 33:
! 34: #ifndef lint
! 35: /*static char sccsid[] = "from: @(#)local_passwd.c 5.5 (Berkeley) 5/6/91";*/
! 36: static char rcsid[] = "$Id: local_passwd.c,v 1.7 1994/12/24 17:27:42 cgd Exp $";
! 37: #endif /* not lint */
! 38:
! 39: #include <sys/types.h>
! 40: #include <pwd.h>
! 41: #include <errno.h>
! 42: #include <stdio.h>
! 43: #include <string.h>
! 44:
! 45: uid_t uid;
! 46:
! 47: char *progname = "passwd";
! 48: char *tempname;
! 49:
! 50: local_passwd(uname)
! 51: char *uname;
! 52: {
! 53: struct passwd *pw;
! 54: int pfd, tfd;
! 55: char *getnewpasswd();
! 56:
! 57: if (!(pw = getpwnam(uname))) {
! 58: #ifdef YP
! 59: extern int use_yp;
! 60: if (!use_yp)
! 61: #endif
! 62: (void)fprintf(stderr, "passwd: unknown user %s.\n", uname);
! 63: return(1);
! 64: }
! 65:
! 66: uid = getuid();
! 67: if (uid && uid != pw->pw_uid) {
! 68: (void)fprintf(stderr, "passwd: %s\n", strerror(EACCES));
! 69: return(1);
! 70: }
! 71:
! 72: pw_init();
! 73: pfd = pw_lock();
! 74: tfd = pw_tmp();
! 75:
! 76: /*
! 77: * Get the new password. Reset passwd change time to zero; when
! 78: * classes are implemented, go and get the "offset" value for this
! 79: * class and reset the timer.
! 80: */
! 81: pw->pw_passwd = getnewpasswd(pw);
! 82: pw->pw_change = 0;
! 83: pw_copy(pfd, tfd, pw);
! 84:
! 85: if (!pw_mkdb())
! 86: pw_error((char *)NULL, 0, 1);
! 87: return(0);
! 88: }
! 89:
! 90: char *
! 91: getnewpasswd(pw)
! 92: register struct passwd *pw;
! 93: {
! 94: register char *p, *t;
! 95: int tries;
! 96: char buf[_PASSWORD_LEN+1], salt[9], *crypt(), *getpass();
! 97:
! 98: (void)printf("Changing local password for %s.\n", pw->pw_name);
! 99:
! 100: if (uid && pw->pw_passwd[0] &&
! 101: strcmp(crypt(getpass("Old password:"), pw->pw_passwd),
! 102: pw->pw_passwd)) {
! 103: errno = EACCES;
! 104: pw_error(NULL, 1, 1);
! 105: }
! 106:
! 107: for (buf[0] = '\0', tries = 0;;) {
! 108: p = getpass("New password:");
! 109: if (!*p) {
! 110: (void)printf("Password unchanged.\n");
! 111: pw_error(NULL, 0, 0);
! 112: }
! 113: if (strlen(p) <= 5 && ++tries < 2) {
! 114: (void)printf("Please enter a longer password.\n");
! 115: continue;
! 116: }
! 117: for (t = p; *t && islower(*t); ++t);
! 118: if (!*t && ++tries < 2) {
! 119: (void)printf("Please don't use an all-lower case password.\nUnusual capitalization, control characters or digits are suggested.\n");
! 120: continue;
! 121: }
! 122: (void)strcpy(buf, p);
! 123: if (!strcmp(buf, getpass("Retype new password:")))
! 124: break;
! 125: (void)printf("Mismatch; try again, EOF to quit.\n");
! 126: }
! 127: /* grab a random printable character that isn't a colon */
! 128: (void)srandom((int)time((time_t *)NULL));
! 129: #ifdef NEWSALT
! 130: salt[0] = _PASSWORD_EFMT1;
! 131: to64(&salt[1], (long)(29 * 25), 4);
! 132: to64(&salt[5], random(), 4);
! 133: #else
! 134: to64(&salt[0], random(), 2);
! 135: #endif
! 136: return(crypt(buf, salt));
! 137: }
! 138:
! 139: static unsigned char itoa64[] = /* 0 ... 63 => ascii - 64 */
! 140: "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
! 141:
! 142: to64(s, v, n)
! 143: register char *s;
! 144: register long v;
! 145: register int n;
! 146: {
! 147: while (--n >= 0) {
! 148: *s++ = itoa64[v&0x3f];
! 149: v >>= 6;
! 150: }
! 151: }
![[BACK]](/icons/back.gif){kind=icon}
Return to local_passwd.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / passwd