1 /* ====================================================================
2 * The Apache Software License, Version 1.1
4 * Copyright (c) 2000 The Apache Software Foundation. All rights
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. The end-user documentation included with the redistribution,
20 * if any, must include the following acknowledgment:
21 * "This product includes software developed by the
22 * Apache Software Foundation (http://www.apache.org/)."
23 * Alternately, this acknowledgment may appear in the software itself,
24 * if and wherever such third-party acknowledgments normally appear.
26 * 4. The names "Apache" and "Apache Software Foundation" must
27 * not be used to endorse or promote products derived from this
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31 * 5. Products derived from this software may not be called "Apache",
32 * nor may "Apache" appear in their name, without prior written
33 * permission of the Apache Software Foundation.
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
47 * ====================================================================
49 * This software consists of voluntary contributions made by many
50 * individuals on behalf of the Apache Software Foundation. For more
51 * information on the Apache Software Foundation, please see
52 * <http://www.apache.org/>.
54 * Portions of this software are based upon public domain software
55 * originally written at the National Center for Supercomputing Applications,
56 * University of Illinois, Urbana-Champaign.
59 /******************************************************************************
60 ******************************************************************************
61 * NOTE! This program is not safe as a setuid executable! Do not make it
63 ******************************************************************************
64 *****************************************************************************/
66 * htpasswd.c: simple program for manipulating password file for
67 * the Apache HTTP server
69 * Originally by Rob McCool
73 * 1: Failure; file access/permission problem
74 * 2: Failure; command line syntax problem (usage message issued)
75 * 3: Failure; password verification failure
76 * 4: Failure; operation interrupted (such as with CTRL/C)
77 * 5: Failure; buffer would overflow (username, filename, or computed
79 * 6: Failure; username contains illegal or reserved characters
83 #include "apr_errno.h"
84 #include "ap_config.h"
91 #define unlink _unlink
94 #ifndef CHARSET_EBCDIC
97 #else /*CHARSET_EBCDIC*/
100 #endif /*CHARSET_EBCDIC*/
102 #define MAX_STRING_LEN 256
108 #define ERR_FILEPERM 1
110 #define ERR_PWMISMATCH 3
111 #define ERR_INTERRUPTED 4
112 #define ERR_OVERFLOW 5
113 #define ERR_BADUSER 6
116 * This needs to be declared statically so the signal handler can
119 static char *tempfilename;
122 * Get a line of input from the user, not including any terminating
125 static int getline(char *s, int n, FILE *f)
130 s[i] = (char) fgetc(f);
136 if ((s[i] == 0x4) || (s[i] == LF) || (i == (n - 1))) {
138 return (feof(f) ? 1 : 0);
144 static void putline(FILE *f, char *l)
148 for (x = 0; l[x]; x++) {
154 static void to64(char *s, unsigned long v, int n)
156 static unsigned char itoa64[] = /* 0 ... 63 => ASCII - 64 */
157 "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
160 *s++ = itoa64[v&0x3f];
166 * Make a password record from the given information. A zero return
167 * indicates success; failure means that the output buffer contains an
168 * error message instead.
170 static int mkrecord(char *user, char *record, size_t rlen, char *passwd,
175 char pwin[MAX_STRING_LEN];
176 char pwv[MAX_STRING_LEN];
180 if (passwd != NULL) {
184 bufsize = sizeof(pwin);
185 if (ap_getpass("New password: ", pwin, &bufsize) != 0) {
186 ap_snprintf(record, (rlen - 1), "password too long (>%d)",
190 bufsize = sizeof(pwv);
191 ap_getpass("Re-type new password: ", pwv, &bufsize);
192 if (strcmp(pwin, pwv) != 0) {
193 ap_cpystrn(record, "password verification error", (rlen - 1));
194 return ERR_PWMISMATCH;
197 memset(pwv, '\0', sizeof(pwin));
202 /* XXX cpw >= 28 + strlen(sha1) chars - fixed len SHA */
203 ap_sha1_base64(pw,strlen(pw),cpw);
207 (void) srand((int) time((time_t *) NULL));
208 to64(&salt[0], rand(), 8);
211 ap_MD5Encode((const unsigned char *)pw, (const unsigned char *)salt,
216 /* XXX this len limitation is not in sync with any HTTPd len. */
217 ap_cpystrn(cpw,pw,sizeof(cpw));
222 (void) srand((int) time((time_t *) NULL));
223 to64(&salt[0], rand(), 8);
226 ap_cpystrn(cpw, (char *)crypt(pw, salt), sizeof(cpw) - 1);
229 memset(pw, '\0', strlen(pw));
232 * Check to see if the buffer is large enough to hold the username,
233 * hash, and delimiters.
235 if ((strlen(user) + 1 + strlen(cpw)) > (rlen - 1)) {
236 ap_cpystrn(record, "resultant record too long", (rlen - 1));
239 strcpy(record, user);
245 static int usage(void)
247 fprintf(stderr, "Usage:\n");
248 fprintf(stderr, "\thtpasswd [-cmdps] passwordfile username\n");
249 fprintf(stderr, "\thtpasswd -b[cmdps] passwordfile username password\n\n");
250 fprintf(stderr, " -c Create a new file.\n");
251 fprintf(stderr, " -m Force MD5 encryption of the password"
252 #if defined(WIN32) || defined(TPF)
256 fprintf(stderr, " -d Force CRYPT encryption of the password"
257 #if (!(defined(WIN32) || defined(TPF)))
261 fprintf(stderr, " -p Do not encrypt the password (plaintext).\n");
262 fprintf(stderr, " -s Force SHA encryption of the password.\n");
263 fprintf(stderr, " -b Use the password from the command line rather "
264 "than prompting for it.\n");
266 "On Windows and TPF systems the '-m' flag is used by default.\n");
268 "On all other systems, the '-p' flag will probably not work.\n");
272 static void interrupted(void)
274 fprintf(stderr, "Interrupted.\n");
275 if (tempfilename != NULL) {
276 unlink(tempfilename);
278 exit(ERR_INTERRUPTED);
282 * Check to see if the specified file can be opened for the given
285 static int accessible(char *fname, char *mode)
289 s = fopen(fname, mode);
298 * Return true if a file is readable.
300 static int readable(char *fname)
302 return accessible(fname, "r");
306 * Return true if the specified file can be opened for write access.
308 static int writable(char *fname)
310 return accessible(fname, "a");
314 * Return true if the named file exists, regardless of permissions.
316 static int exists(char *fname)
326 check = _stat(fname, &sbuf);
328 check = stat(fname, &sbuf);
330 return ((check == -1) && (errno == ENOENT)) ? 0 : 1;
334 * Copy from the current position of one file to the current position
337 static void copy_file(FILE *target, FILE *source)
339 static char line[MAX_STRING_LEN];
341 while (fgets(line, sizeof(line), source) != NULL) {
347 * Let's do it. We end up doing a lot of file opening and closing,
348 * but what do we care? This application isn't run constantly.
350 int main(int argc, char *argv[])
354 char user[MAX_STRING_LEN];
355 char password[MAX_STRING_LEN];
356 char record[MAX_STRING_LEN];
357 char line[MAX_STRING_LEN];
358 char pwfilename[MAX_STRING_LEN];
363 int noninteractive = 0;
368 signal(SIGINT, (void (*)(int)) interrupted);
371 * Preliminary check to make sure they provided at least
372 * three arguments, we'll do better argument checking as
373 * we parse the command line.
380 * Go through the argument list and pick out any options. They
381 * have to precede any other arguments.
383 for (i = 1; i < argc; i++) {
388 while (*++arg != '\0') {
392 else if (*arg == 'm') {
395 else if (*arg == 's') {
398 else if (*arg == 'p') {
401 else if (*arg == 'd') {
404 else if (*arg == 'b') {
415 * Make sure we still have exactly the right number of arguments left
416 * (the filename, the username, and possibly the password if -b was
419 if ((argc - i) != args_left) {
422 if (strlen(argv[i]) > (sizeof(pwfilename) - 1)) {
423 fprintf(stderr, "%s: filename too long\n", argv[0]);
426 strcpy(pwfilename, argv[i]);
427 if (strlen(argv[i + 1]) > (sizeof(user) - 1)) {
428 fprintf(stderr, "%s: username too long (>%d)\n", argv[0],
432 strcpy(user, argv[i + 1]);
433 if ((arg = strchr(user, ':')) != NULL) {
434 fprintf(stderr, "%s: username contains illegal character '%c'\n",
438 if (noninteractive) {
439 if (strlen(argv[i + 2]) > (sizeof(password) - 1)) {
440 fprintf(stderr, "%s: password too long (>%d)\n", argv[0],
441 sizeof(password) - 1);
444 strcpy(password, argv[i + 2]);
448 if (alg == ALG_CRYPT) {
450 fprintf(stderr, "Automatically using MD5 format on Windows.\n");
454 #if (!(defined(WIN32) || defined(TPF)))
455 if (alg == ALG_PLAIN) {
456 fprintf(stderr,"Warning: storing passwords as plain text might "
457 "just not work on this platform.\n");
461 * Verify that the file exists if -c was omitted. We give a special
462 * message if it doesn't.
464 if ((! newfile) && (! exists(pwfilename))) {
465 fprintf(stderr, "%s: cannot modify file %s; use '-c' to create it\n",
466 argv[0], pwfilename);
471 * Verify that we can read the existing file in the case of an update
472 * to it (rather than creation of a new one).
474 if ((! newfile) && (! readable(pwfilename))) {
475 fprintf(stderr, "%s: cannot open file %s for read access\n",
476 argv[0], pwfilename);
481 * Now check to see if we can preserve an existing file in case
482 * of password verification errors on a -c operation.
484 if (newfile && exists(pwfilename) && (! readable(pwfilename))) {
485 fprintf(stderr, "%s: cannot open file %s for read access\n"
486 "%s: existing auth data would be lost on password mismatch",
487 argv[0], pwfilename, argv[0]);
492 * Now verify that the file is writable!
494 if (! writable(pwfilename)) {
495 fprintf(stderr, "%s: cannot open file %s for write access\n",
496 argv[0], pwfilename);
502 * All the file access checks have been made. Time to go to work;
503 * try to create the record for the username in question. If that
504 * fails, there's no need to waste any time on file manipulations.
505 * Any error message text is returned in the record buffer, since
506 * the mkrecord() routine doesn't have access to argv[].
508 i = mkrecord(user, record, sizeof(record) - 1,
509 noninteractive ? password : NULL,
512 fprintf(stderr, "%s: %s\n", argv[0], record);
517 * We can access the files the right way, and we have a record
518 * to add or update. Let's do it..
520 tempfilename = tmpnam(NULL);
521 if ((tempfilename == NULL) || (strlen(tempfilename) == 0)) {
522 fprintf(stderr, "%s: unable to generate temporary filename\n",
528 ftemp = fopen(tempfilename, "w+");
530 fprintf(stderr, "%s: unable to create temporary file '%s'\n", argv[0],
536 * If we're not creating a new file, copy records from the existing
537 * one to the temporary file until we find the specified user.
540 char scratch[MAX_STRING_LEN];
542 fpw = fopen(pwfilename, "r");
543 while (! (getline(line, sizeof(line), fpw))) {
546 if ((line[0] == '#') || (line[0] == '\0')) {
547 putline(ftemp, line);
550 strcpy(scratch, line);
552 * See if this is our user.
554 colon = strchr(scratch, ':');
558 if (strcmp(user, scratch) != 0) {
559 putline(ftemp, line);
567 fprintf(stderr, "Updating ");
570 fprintf(stderr, "Adding ");
572 fprintf(stderr, "password for user %s\n", user);
574 * Now add the user record we created.
576 putline(ftemp, record);
578 * If we're updating an existing file, there may be additional
579 * records beyond the one we're updating, so copy them.
582 copy_file(ftemp, fpw);
586 * The temporary file now contains the information that should be
587 * in the actual password file. Close the open files, re-open them
588 * in the appropriate mode, and copy them file to the real one.
591 fpw = fopen(pwfilename, "w+");
592 ftemp = fopen(tempfilename, "r");
593 copy_file(fpw, ftemp);
596 unlink(tempfilename);