Annotation of embedaddon/sudo/plugins/sudoers/auth/rfc1938.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (c) 1994-1996, 1998-2005, 2010-2011
! 3: * Todd C. Miller <Todd.Miller@courtesan.com>
! 4: *
! 5: * Permission to use, copy, modify, and distribute this software for any
! 6: * purpose with or without fee is hereby granted, provided that the above
! 7: * copyright notice and this permission notice appear in all copies.
! 8: *
! 9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
! 10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
! 11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
! 12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
! 13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
! 14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
! 15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
! 16: *
! 17: * Sponsored in part by the Defense Advanced Research Projects
! 18: * Agency (DARPA) and Air Force Research Laboratory, Air Force
! 19: * Materiel Command, USAF, under agreement number F39502-99-1-0512.
! 20: */
! 21:
! 22: #include <config.h>
! 23:
! 24: #include <sys/types.h>
! 25: #include <sys/param.h>
! 26: #include <stdio.h>
! 27: #ifdef STDC_HEADERS
! 28: # include <stdlib.h>
! 29: # include <stddef.h>
! 30: #else
! 31: # ifdef HAVE_STDLIB_H
! 32: # include <stdlib.h>
! 33: # endif
! 34: #endif /* STDC_HEADERS */
! 35: #ifdef HAVE_STRING_H
! 36: # include <string.h>
! 37: #endif /* HAVE_STRING_H */
! 38: #ifdef HAVE_STRINGS_H
! 39: # include <strings.h>
! 40: #endif /* HAVE_STRINGS_H */
! 41: #ifdef HAVE_UNISTD_H
! 42: # include <unistd.h>
! 43: #endif /* HAVE_UNISTD_H */
! 44: #include <pwd.h>
! 45:
! 46: #if defined(HAVE_SKEY)
! 47: # include <skey.h>
! 48: # define RFC1938 skey
! 49: # ifdef HAVE_RFC1938_SKEYCHALLENGE
! 50: # define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c),(d))
! 51: # else
! 52: # define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c))
! 53: # endif
! 54: # define rfc1938verify(a,b) skeyverify((a),(b))
! 55: #elif defined(HAVE_OPIE)
! 56: # include <opie.h>
! 57: # define RFC1938 opie
! 58: # define rfc1938challenge(a,b,c,d) opiechallenge((a),(b),(c))
! 59: # define rfc1938verify(a,b) opieverify((a),(b))
! 60: #endif
! 61:
! 62: #include "sudoers.h"
! 63: #include "sudo_auth.h"
! 64:
! 65: int
! 66: rfc1938_setup(struct passwd *pw, char **promptp, sudo_auth *auth)
! 67: {
! 68: char challenge[256];
! 69: static char *orig_prompt = NULL, *new_prompt = NULL;
! 70: static int op_len, np_size;
! 71: static struct RFC1938 rfc1938;
! 72:
! 73: /* Stash a pointer to the rfc1938 struct if we have not initialized */
! 74: if (!auth->data)
! 75: auth->data = &rfc1938;
! 76:
! 77: /* Save the original prompt */
! 78: if (orig_prompt == NULL) {
! 79: orig_prompt = *promptp;
! 80: op_len = strlen(orig_prompt);
! 81:
! 82: /* Ignore trailing colon (we will add our own) */
! 83: if (orig_prompt[op_len - 1] == ':')
! 84: op_len--;
! 85: else if (op_len >= 2 && orig_prompt[op_len - 1] == ' '
! 86: && orig_prompt[op_len - 2] == ':')
! 87: op_len -= 2;
! 88: }
! 89:
! 90: #ifdef HAVE_SKEY
! 91: /* Close old stream */
! 92: if (rfc1938.keyfile)
! 93: (void) fclose(rfc1938.keyfile);
! 94: #endif
! 95:
! 96: /*
! 97: * Look up the user and get the rfc1938 challenge.
! 98: * If the user is not in the OTP db, only post a fatal error if
! 99: * we are running alone (since they may just use a normal passwd).
! 100: */
! 101: if (rfc1938challenge(&rfc1938, pw->pw_name, challenge, sizeof(challenge))) {
! 102: if (IS_ONEANDONLY(auth)) {
! 103: warningx(_("you do not exist in the %s database"), auth->name);
! 104: return AUTH_FATAL;
! 105: } else {
! 106: return AUTH_FAILURE;
! 107: }
! 108: }
! 109:
! 110: /* Get space for new prompt with embedded challenge */
! 111: if (np_size < op_len + strlen(challenge) + 7) {
! 112: np_size = op_len + strlen(challenge) + 7;
! 113: new_prompt = (char *) erealloc(new_prompt, np_size);
! 114: }
! 115:
! 116: if (def_long_otp_prompt)
! 117: (void) snprintf(new_prompt, np_size, "%s\n%s", challenge, orig_prompt);
! 118: else
! 119: (void) snprintf(new_prompt, np_size, "%.*s [ %s ]:", op_len,
! 120: orig_prompt, challenge);
! 121:
! 122: *promptp = new_prompt;
! 123: return AUTH_SUCCESS;
! 124: }
! 125:
! 126: int
! 127: rfc1938_verify(struct passwd *pw, char *pass, sudo_auth *auth)
! 128: {
! 129:
! 130: if (rfc1938verify((struct RFC1938 *) auth->data, pass) == 0)
! 131: return AUTH_SUCCESS;
! 132: else
! 133: return AUTH_FAILURE;
! 134: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>