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
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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
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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
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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,
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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"
95 #define unlink _unlink
98 #ifndef CHARSET_EBCDIC
101 #else /*CHARSET_EBCDIC*/
104 #endif /*CHARSET_EBCDIC*/
106 #define MAX_STRING_LEN 256
112 #define ERR_FILEPERM 1
114 #define ERR_PWMISMATCH 3
115 #define ERR_INTERRUPTED 4
116 #define ERR_OVERFLOW 5
117 #define ERR_BADUSER 6
120 * This needs to be declared statically so the signal handler can
123 static char *tempfilename;
125 * If our platform knows about the tmpnam() external buffer size, create
126 * a buffer to pass in. This is needed in a threaded environment, or
127 * one that thinks it is (like HP-UX).
130 static char tname_buf[L_tmpnam];
132 static char *tname_buf = NULL;
136 * Get a line of input from the user, not including any terminating
139 static int getline(char *s, int n, FILE *f)
144 s[i] = (char) fgetc(f);
150 if ((s[i] == 0x4) || (s[i] == LF) || (i == (n - 1))) {
152 return (feof(f) ? 1 : 0);
158 static void putline(FILE *f, char *l)
162 for (x = 0; l[x]; x++) {
168 static void to64(char *s, unsigned long v, int n)
170 static unsigned char itoa64[] = /* 0 ... 63 => ASCII - 64 */
171 "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
174 *s++ = itoa64[v&0x3f];
180 * Make a password record from the given information. A zero return
181 * indicates success; failure means that the output buffer contains an
182 * error message instead.
184 static int mkrecord(char *user, char *record, size_t rlen, char *passwd,
189 char pwin[MAX_STRING_LEN];
190 char pwv[MAX_STRING_LEN];
194 if (passwd != NULL) {
198 bufsize = sizeof(pwin);
199 if (ap_getpass("New password: ", pwin, &bufsize) != 0) {
200 ap_snprintf(record, (rlen - 1), "password too long (>%d)",
204 bufsize = sizeof(pwv);
205 ap_getpass("Re-type new password: ", pwv, &bufsize);
206 if (strcmp(pwin, pwv) != 0) {
207 ap_cpystrn(record, "password verification error", (rlen - 1));
208 return ERR_PWMISMATCH;
211 memset(pwv, '\0', sizeof(pwin));
216 /* XXX cpw >= 28 + strlen(sha1) chars - fixed len SHA */
217 ap_sha1_base64(pw,strlen(pw),cpw);
221 (void) srand((int) time((time_t *) NULL));
222 to64(&salt[0], rand(), 8);
225 ap_MD5Encode((const unsigned char *)pw, (const unsigned char *)salt,
230 /* XXX this len limitation is not in sync with any HTTPd len. */
231 ap_cpystrn(cpw,pw,sizeof(cpw));
236 (void) srand((int) time((time_t *) NULL));
237 to64(&salt[0], rand(), 8);
240 ap_cpystrn(cpw, (char *)crypt(pw, salt), sizeof(cpw) - 1);
243 memset(pw, '\0', strlen(pw));
246 * Check to see if the buffer is large enough to hold the username,
247 * hash, and delimiters.
249 if ((strlen(user) + 1 + strlen(cpw)) > (rlen - 1)) {
250 ap_cpystrn(record, "resultant record too long", (rlen - 1));
253 strcpy(record, user);
259 static int usage(void)
261 fprintf(stderr, "Usage:\n");
262 fprintf(stderr, "\thtpasswd [-cmdps] passwordfile username\n");
263 fprintf(stderr, "\thtpasswd -b[cmdps] passwordfile username password\n\n");
264 fprintf(stderr, " -c Create a new file.\n");
265 fprintf(stderr, " -m Force MD5 encryption of the password"
266 #if defined(WIN32) || defined(TPF)
270 fprintf(stderr, " -d Force CRYPT encryption of the password"
271 #if (!(defined(WIN32) || defined(TPF)))
275 fprintf(stderr, " -p Do not encrypt the password (plaintext).\n");
276 fprintf(stderr, " -s Force SHA encryption of the password.\n");
277 fprintf(stderr, " -b Use the password from the command line rather "
278 "than prompting for it.\n");
280 "On Windows and TPF systems the '-m' flag is used by default.\n");
282 "On all other systems, the '-p' flag will probably not work.\n");
286 static void interrupted(void)
288 fprintf(stderr, "Interrupted.\n");
289 if (tempfilename != NULL) {
290 unlink(tempfilename);
292 exit(ERR_INTERRUPTED);
296 * Check to see if the specified file can be opened for the given
299 static int accessible(char *fname, char *mode)
303 s = fopen(fname, mode);
312 * Return true if a file is readable.
314 static int readable(char *fname)
316 return accessible(fname, "r");
320 * Return true if the specified file can be opened for write access.
322 static int writable(char *fname)
324 return accessible(fname, "a");
328 * Return true if the named file exists, regardless of permissions.
330 static int exists(char *fname)
340 check = _stat(fname, &sbuf);
342 check = stat(fname, &sbuf);
344 return ((check == -1) && (errno == ENOENT)) ? 0 : 1;
348 * Copy from the current position of one file to the current position
351 static void copy_file(FILE *target, FILE *source)
353 static char line[MAX_STRING_LEN];
355 while (fgets(line, sizeof(line), source) != NULL) {
361 * Let's do it. We end up doing a lot of file opening and closing,
362 * but what do we care? This application isn't run constantly.
364 int main(int argc, char *argv[])
368 char user[MAX_STRING_LEN];
369 char password[MAX_STRING_LEN];
370 char record[MAX_STRING_LEN];
371 char line[MAX_STRING_LEN];
372 char pwfilename[MAX_STRING_LEN];
377 int noninteractive = 0;
380 #ifdef CHARSET_EBCDIC
383 ap_xlate_t *to_ascii;
386 atexit(ap_terminate);
387 ap_create_pool(&pool, NULL);
389 rv = ap_xlate_open(&to_ascii, "ISO8859-1", APR_DEFAULT_CHARSET, pool);
391 fprintf(stderr, "ap_xlate_open(to ASCII)->%d\n", rv);
394 rv = ap_MD5InitEBCDIC(to_ascii);
396 fprintf(stderr, "ap_MD5InitEBCDIC()->%d\n", rv);
399 #endif /*CHARSET_EBCDIC*/
402 signal(SIGINT, (void (*)(int)) interrupted);
405 * Preliminary check to make sure they provided at least
406 * three arguments, we'll do better argument checking as
407 * we parse the command line.
414 * Go through the argument list and pick out any options. They
415 * have to precede any other arguments.
417 for (i = 1; i < argc; i++) {
422 while (*++arg != '\0') {
426 else if (*arg == 'm') {
429 else if (*arg == 's') {
432 else if (*arg == 'p') {
435 else if (*arg == 'd') {
438 else if (*arg == 'b') {
449 * Make sure we still have exactly the right number of arguments left
450 * (the filename, the username, and possibly the password if -b was
453 if ((argc - i) != args_left) {
456 if (strlen(argv[i]) > (sizeof(pwfilename) - 1)) {
457 fprintf(stderr, "%s: filename too long\n", argv[0]);
460 strcpy(pwfilename, argv[i]);
461 if (strlen(argv[i + 1]) > (sizeof(user) - 1)) {
462 fprintf(stderr, "%s: username too long (>%d)\n", argv[0],
466 strcpy(user, argv[i + 1]);
467 if ((arg = strchr(user, ':')) != NULL) {
468 fprintf(stderr, "%s: username contains illegal character '%c'\n",
472 if (noninteractive) {
473 if (strlen(argv[i + 2]) > (sizeof(password) - 1)) {
474 fprintf(stderr, "%s: password too long (>%d)\n", argv[0],
475 sizeof(password) - 1);
478 strcpy(password, argv[i + 2]);
482 if (alg == ALG_CRYPT) {
484 fprintf(stderr, "Automatically using MD5 format on Windows.\n");
488 #if (!(defined(WIN32) || defined(TPF)))
489 if (alg == ALG_PLAIN) {
490 fprintf(stderr,"Warning: storing passwords as plain text might "
491 "just not work on this platform.\n");
495 * Verify that the file exists if -c was omitted. We give a special
496 * message if it doesn't.
498 if ((! newfile) && (! exists(pwfilename))) {
499 fprintf(stderr, "%s: cannot modify file %s; use '-c' to create it\n",
500 argv[0], pwfilename);
505 * Verify that we can read the existing file in the case of an update
506 * to it (rather than creation of a new one).
508 if ((! newfile) && (! readable(pwfilename))) {
509 fprintf(stderr, "%s: cannot open file %s for read access\n",
510 argv[0], pwfilename);
515 * Now check to see if we can preserve an existing file in case
516 * of password verification errors on a -c operation.
518 if (newfile && exists(pwfilename) && (! readable(pwfilename))) {
519 fprintf(stderr, "%s: cannot open file %s for read access\n"
520 "%s: existing auth data would be lost on password mismatch",
521 argv[0], pwfilename, argv[0]);
526 * Now verify that the file is writable!
528 if (! writable(pwfilename)) {
529 fprintf(stderr, "%s: cannot open file %s for write access\n",
530 argv[0], pwfilename);
536 * All the file access checks have been made. Time to go to work;
537 * try to create the record for the username in question. If that
538 * fails, there's no need to waste any time on file manipulations.
539 * Any error message text is returned in the record buffer, since
540 * the mkrecord() routine doesn't have access to argv[].
542 i = mkrecord(user, record, sizeof(record) - 1,
543 noninteractive ? password : NULL,
546 fprintf(stderr, "%s: %s\n", argv[0], record);
551 * We can access the files the right way, and we have a record
552 * to add or update. Let's do it..
555 tempfilename = tmpnam(tname_buf);
556 if ((tempfilename == NULL) || (*tempfilename == '\0')) {
557 fprintf(stderr, "%s: unable to generate temporary filename\n",
565 ftemp = fopen(tempfilename, "w+");
567 fprintf(stderr, "%s: unable to create temporary file '%s'\n", argv[0],
573 * If we're not creating a new file, copy records from the existing
574 * one to the temporary file until we find the specified user.
577 char scratch[MAX_STRING_LEN];
579 fpw = fopen(pwfilename, "r");
580 while (! (getline(line, sizeof(line), fpw))) {
583 if ((line[0] == '#') || (line[0] == '\0')) {
584 putline(ftemp, line);
587 strcpy(scratch, line);
589 * See if this is our user.
591 colon = strchr(scratch, ':');
595 if (strcmp(user, scratch) != 0) {
596 putline(ftemp, line);
604 fprintf(stderr, "Updating ");
607 fprintf(stderr, "Adding ");
609 fprintf(stderr, "password for user %s\n", user);
611 * Now add the user record we created.
613 putline(ftemp, record);
615 * If we're updating an existing file, there may be additional
616 * records beyond the one we're updating, so copy them.
619 copy_file(ftemp, fpw);
623 * The temporary file now contains the information that should be
624 * in the actual password file. Close the open files, re-open them
625 * in the appropriate mode, and copy them file to the real one.
628 fpw = fopen(pwfilename, "w+");
629 ftemp = fopen(tempfilename, "r");
630 copy_file(fpw, ftemp);
633 unlink(tempfilename);