Annotation of embedaddon/sudo/plugins/sudoers/auth/passwd.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (c) 1999-2005, 2010-2011 Todd C. Miller <Todd.Miller@courtesan.com>
! 3: *
! 4: * Permission to use, copy, modify, and distribute this software for any
! 5: * purpose with or without fee is hereby granted, provided that the above
! 6: * copyright notice and this permission notice appear in all copies.
! 7: *
! 8: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
! 9: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
! 10: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
! 11: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
! 12: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
! 13: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
! 14: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
! 15: *
! 16: * Sponsored in part by the Defense Advanced Research Projects
! 17: * Agency (DARPA) and Air Force Research Laboratory, Air Force
! 18: * Materiel Command, USAF, under agreement number F39502-99-1-0512.
! 19: */
! 20:
! 21: #include <config.h>
! 22:
! 23: #include <sys/types.h>
! 24: #include <sys/param.h>
! 25: #include <stdio.h>
! 26: #ifdef STDC_HEADERS
! 27: # include <stdlib.h>
! 28: # include <stddef.h>
! 29: #else
! 30: # ifdef HAVE_STDLIB_H
! 31: # include <stdlib.h>
! 32: # endif
! 33: #endif /* STDC_HEADERS */
! 34: #ifdef HAVE_STRING_H
! 35: # include <string.h>
! 36: #endif /* HAVE_STRING_H */
! 37: #ifdef HAVE_STRINGS_H
! 38: # include <strings.h>
! 39: #endif /* HAVE_STRINGS_H */
! 40: #ifdef HAVE_UNISTD_H
! 41: # include <unistd.h>
! 42: #endif /* HAVE_UNISTD_H */
! 43: #include <pwd.h>
! 44:
! 45: #include "sudoers.h"
! 46: #include "sudo_auth.h"
! 47:
! 48: #define DESLEN 13
! 49: #define HAS_AGEINFO(p, l) (l == 18 && p[DESLEN] == ',')
! 50:
! 51: int
! 52: passwd_init(struct passwd *pw, sudo_auth *auth)
! 53: {
! 54: #ifdef HAVE_SKEYACCESS
! 55: if (skeyaccess(pw, user_tty, NULL, NULL) == 0)
! 56: return AUTH_FAILURE;
! 57: #endif
! 58: sudo_setspent();
! 59: auth->data = sudo_getepw(pw);
! 60: sudo_endspent();
! 61: return AUTH_SUCCESS;
! 62: }
! 63:
! 64: int
! 65: passwd_verify(struct passwd *pw, char *pass, sudo_auth *auth)
! 66: {
! 67: char sav, *epass;
! 68: char *pw_epasswd = auth->data;
! 69: size_t pw_len;
! 70: int error;
! 71:
! 72: pw_len = strlen(pw_epasswd);
! 73:
! 74: #ifdef HAVE_GETAUTHUID
! 75: /* Ultrix shadow passwords may use crypt16() */
! 76: error = strcmp(pw_epasswd, (char *) crypt16(pass, pw_epasswd));
! 77: if (!error)
! 78: return AUTH_SUCCESS;
! 79: #endif /* HAVE_GETAUTHUID */
! 80:
! 81: /*
! 82: * Truncate to 8 chars if standard DES since not all crypt()'s do this.
! 83: * If this turns out not to be safe we will have to use OS #ifdef's (sigh).
! 84: */
! 85: sav = pass[8];
! 86: if (pw_len == DESLEN || HAS_AGEINFO(pw_epasswd, pw_len))
! 87: pass[8] = '\0';
! 88:
! 89: /*
! 90: * Normal UN*X password check.
! 91: * HP-UX may add aging info (separated by a ',') at the end so
! 92: * only compare the first DESLEN characters in that case.
! 93: */
! 94: epass = (char *) crypt(pass, pw_epasswd);
! 95: pass[8] = sav;
! 96: if (HAS_AGEINFO(pw_epasswd, pw_len) && strlen(epass) == DESLEN)
! 97: error = strncmp(pw_epasswd, epass, DESLEN);
! 98: else
! 99: error = strcmp(pw_epasswd, epass);
! 100:
! 101: return error ? AUTH_FAILURE : AUTH_SUCCESS;
! 102: }
! 103:
! 104: int
! 105: passwd_cleanup(pw, auth)
! 106: struct passwd *pw;
! 107: sudo_auth *auth;
! 108: {
! 109: char *pw_epasswd = auth->data;
! 110:
! 111: if (pw_epasswd != NULL) {
! 112: zero_bytes(pw_epasswd, strlen(pw_epasswd));
! 113: efree(pw_epasswd);
! 114: }
! 115: return AUTH_SUCCESS;
! 116: }
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