1 /* ====================================================================
2 * The Apache Software License, Version 1.1
4 * Copyright (c) 2000 The Apache Software Foundation. All rights
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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.
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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,
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
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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
82 #include "apr_strings.h"
84 #include "apr_errno.h"
85 #include "ap_config.h"
97 #define unlink _unlink
100 #ifndef CHARSET_EBCDIC
103 #else /*CHARSET_EBCDIC*/
106 #endif /*CHARSET_EBCDIC*/
108 #define MAX_STRING_LEN 256
114 #define ERR_FILEPERM 1
116 #define ERR_PWMISMATCH 3
117 #define ERR_INTERRUPTED 4
118 #define ERR_OVERFLOW 5
119 #define ERR_BADUSER 6
122 * This needs to be declared statically so the signal handler can
125 static char *tempfilename;
127 * If our platform knows about the tmpnam() external buffer size, create
128 * a buffer to pass in. This is needed in a threaded environment, or
129 * one that thinks it is (like HP-UX).
132 static char tname_buf[L_tmpnam];
134 static char *tname_buf = NULL;
138 * Get a line of input from the user, not including any terminating
141 static int getline(char *s, int n, FILE *f)
146 s[i] = (char) fgetc(f);
152 if ((s[i] == 0x4) || (s[i] == LF) || (i == (n - 1))) {
154 return (feof(f) ? 1 : 0);
160 static void putline(FILE *f, char *l)
164 for (x = 0; l[x]; x++) {
170 static void to64(char *s, unsigned long v, int n)
172 static unsigned char itoa64[] = /* 0 ... 63 => ASCII - 64 */
173 "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
176 *s++ = itoa64[v&0x3f];
182 * Make a password record from the given information. A zero return
183 * indicates success; failure means that the output buffer contains an
184 * error message instead.
186 static int mkrecord(char *user, char *record, size_t rlen, char *passwd,
191 char pwin[MAX_STRING_LEN];
192 char pwv[MAX_STRING_LEN];
196 if (passwd != NULL) {
200 bufsize = sizeof(pwin);
201 if (apr_getpass("New password: ", pwin, &bufsize) != 0) {
202 apr_snprintf(record, (rlen - 1), "password too long (>%d)",
206 bufsize = sizeof(pwv);
207 apr_getpass("Re-type new password: ", pwv, &bufsize);
208 if (strcmp(pwin, pwv) != 0) {
209 apr_cpystrn(record, "password verification error", (rlen - 1));
210 return ERR_PWMISMATCH;
213 memset(pwv, '\0', sizeof(pwin));
218 /* XXX cpw >= 28 + strlen(sha1) chars - fixed len SHA */
219 ap_sha1_base64(pw,strlen(pw),cpw);
223 (void) srand((int) time((time_t *) NULL));
224 to64(&salt[0], rand(), 8);
227 apr_MD5Encode((const char *)pw, (const char *)salt,
232 /* XXX this len limitation is not in sync with any HTTPd len. */
233 apr_cpystrn(cpw,pw,sizeof(cpw));
238 (void) srand((int) time((time_t *) NULL));
239 to64(&salt[0], rand(), 8);
242 apr_cpystrn(cpw, (char *)crypt(pw, salt), sizeof(cpw) - 1);
245 memset(pw, '\0', strlen(pw));
248 * Check to see if the buffer is large enough to hold the username,
249 * hash, and delimiters.
251 if ((strlen(user) + 1 + strlen(cpw)) > (rlen - 1)) {
252 apr_cpystrn(record, "resultant record too long", (rlen - 1));
255 strcpy(record, user);
261 static int usage(void)
263 fprintf(stderr, "Usage:\n");
264 fprintf(stderr, "\thtpasswd [-cmdps] passwordfile username\n");
265 fprintf(stderr, "\thtpasswd -b[cmdps] passwordfile username password\n\n");
266 fprintf(stderr, "\thtpasswd -n[mdps] username\n");
267 fprintf(stderr, "\thtpasswd -nb[mdps] username password\n");
268 fprintf(stderr, " -c Create a new file.\n");
269 fprintf(stderr, " -n Don't update file; display results on stdout.\n");
270 fprintf(stderr, " -m Force MD5 encryption of the password"
271 #if defined(WIN32) || defined(TPF)
275 fprintf(stderr, " -d Force CRYPT encryption of the password"
276 #if (!(defined(WIN32) || defined(TPF)))
280 fprintf(stderr, " -p Do not encrypt the password (plaintext).\n");
281 fprintf(stderr, " -s Force SHA encryption of the password.\n");
282 fprintf(stderr, " -b Use the password from the command line rather "
283 "than prompting for it.\n");
285 "On Windows and TPF systems the '-m' flag is used by default.\n");
287 "On all other systems, the '-p' flag will probably not work.\n");
291 static void interrupted(void)
293 fprintf(stderr, "Interrupted.\n");
294 if (tempfilename != NULL) {
295 unlink(tempfilename);
297 exit(ERR_INTERRUPTED);
301 * Check to see if the specified file can be opened for the given
304 static int accessible(char *fname, char *mode)
308 s = fopen(fname, mode);
317 * Return true if a file is readable.
319 static int readable(char *fname)
321 return accessible(fname, "r");
325 * Return true if the specified file can be opened for write access.
327 static int writable(char *fname)
329 return accessible(fname, "a");
333 * Return true if the named file exists, regardless of permissions.
335 static int exists(char *fname)
340 check = apr_stat(&sbuf, fname, NULL);
341 return ((check == -1) && (errno == ENOENT)) ? 0 : 1;
345 * Copy from the current position of one file to the current position
348 static void copy_file(FILE *target, FILE *source)
350 static char line[MAX_STRING_LEN];
352 while (fgets(line, sizeof(line), source) != NULL) {
358 * Let's do it. We end up doing a lot of file opening and closing,
359 * but what do we care? This application isn't run constantly.
361 int main(int argc, char *argv[])
365 char user[MAX_STRING_LEN];
366 char password[MAX_STRING_LEN];
367 char record[MAX_STRING_LEN];
368 char line[MAX_STRING_LEN];
369 char pwfilename[MAX_STRING_LEN];
375 int noninteractive = 0;
378 #ifdef CHARSET_EBCDIC
381 apr_xlate_t *to_ascii;
384 atexit(apr_terminate);
385 apr_create_pool(&pool, NULL);
387 rv = apr_xlate_open(&to_ascii, "ISO8859-1", APR_DEFAULT_CHARSET, pool);
389 fprintf(stderr, "apr_xlate_open(to ASCII)->%d\n", rv);
392 rv = ap_SHA1InitEBCDIC(to_ascii);
394 fprintf(stderr, "ap_SHA1InitEBCDIC()->%d\n", rv);
397 rv = apr_MD5InitEBCDIC(to_ascii);
399 fprintf(stderr, "apr_MD5InitEBCDIC()->%d\n", rv);
402 #endif /*CHARSET_EBCDIC*/
405 signal(SIGINT, (void (*)(int)) interrupted);
408 * Preliminary check to make sure they provided at least
409 * three arguments, we'll do better argument checking as
410 * we parse the command line.
417 * Go through the argument list and pick out any options. They
418 * have to precede any other arguments.
420 for (i = 1; i < argc; i++) {
425 while (*++arg != '\0') {
429 else if (*arg == 'n') {
433 else if (*arg == 'm') {
436 else if (*arg == 's') {
439 else if (*arg == 'p') {
442 else if (*arg == 'd') {
445 else if (*arg == 'b') {
456 * Make sure we still have exactly the right number of arguments left
457 * (the filename, the username, and possibly the password if -b was
460 if ((argc - i) != args_left) {
463 if (newfile && nofile) {
464 fprintf(stderr, "%s: -c and -n options conflict\n", argv[0]);
471 if (strlen(argv[i]) > (sizeof(pwfilename) - 1)) {
472 fprintf(stderr, "%s: filename too long\n", argv[0]);
475 strcpy(pwfilename, argv[i]);
476 if (strlen(argv[i + 1]) > (sizeof(user) - 1)) {
477 fprintf(stderr, "%s: username too long (>%d)\n", argv[0],
482 strcpy(user, argv[i + 1]);
483 if ((arg = strchr(user, ':')) != NULL) {
484 fprintf(stderr, "%s: username contains illegal character '%c'\n",
488 if (noninteractive) {
489 if (strlen(argv[i + 2]) > (sizeof(password) - 1)) {
490 fprintf(stderr, "%s: password too long (>%d)\n", argv[0],
491 sizeof(password) - 1);
494 strcpy(password, argv[i + 2]);
498 if (alg == ALG_CRYPT) {
500 fprintf(stderr, "Automatically using MD5 format on Windows.\n");
504 #if (!(defined(WIN32) || defined(TPF)))
505 if (alg == ALG_PLAIN) {
506 fprintf(stderr,"Warning: storing passwords as plain text might "
507 "just not work on this platform.\n");
512 * Only do the file checks if we're supposed to frob it.
514 * Verify that the file exists if -c was omitted. We give a special
515 * message if it doesn't.
517 if ((! newfile) && (! exists(pwfilename))) {
519 "%s: cannot modify file %s; use '-c' to create it\n",
520 argv[0], pwfilename);
525 * Verify that we can read the existing file in the case of an update
526 * to it (rather than creation of a new one).
528 if ((! newfile) && (! readable(pwfilename))) {
529 fprintf(stderr, "%s: cannot open file %s for read access\n",
530 argv[0], pwfilename);
535 * Now check to see if we can preserve an existing file in case
536 * of password verification errors on a -c operation.
538 if (newfile && exists(pwfilename) && (! readable(pwfilename))) {
539 fprintf(stderr, "%s: cannot open file %s for read access\n"
540 "%s: existing auth data would be lost on "
542 argv[0], pwfilename, argv[0]);
547 * Now verify that the file is writable!
549 if (! writable(pwfilename)) {
550 fprintf(stderr, "%s: cannot open file %s for write access\n",
551 argv[0], pwfilename);
558 * All the file access checks (if any) have been made. Time to go to work;
559 * try to create the record for the username in question. If that
560 * fails, there's no need to waste any time on file manipulations.
561 * Any error message text is returned in the record buffer, since
562 * the mkrecord() routine doesn't have access to argv[].
564 i = mkrecord(user, record, sizeof(record) - 1,
565 noninteractive ? password : NULL,
568 fprintf(stderr, "%s: %s\n", argv[0], record);
572 printf("%s\n", record);
577 * We can access the files the right way, and we have a record
578 * to add or update. Let's do it..
581 tempfilename = tmpnam(tname_buf);
582 if ((tempfilename == NULL) || (*tempfilename == '\0')) {
583 fprintf(stderr, "%s: unable to generate temporary filename\n",
591 ftemp = fopen(tempfilename, "w+");
593 fprintf(stderr, "%s: unable to create temporary file '%s'\n", argv[0],
599 * If we're not creating a new file, copy records from the existing
600 * one to the temporary file until we find the specified user.
603 char scratch[MAX_STRING_LEN];
605 fpw = fopen(pwfilename, "r");
606 while (! (getline(line, sizeof(line), fpw))) {
609 if ((line[0] == '#') || (line[0] == '\0')) {
610 putline(ftemp, line);
613 strcpy(scratch, line);
615 * See if this is our user.
617 colon = strchr(scratch, ':');
621 if (strcmp(user, scratch) != 0) {
622 putline(ftemp, line);
630 fprintf(stderr, "Updating ");
633 fprintf(stderr, "Adding ");
635 fprintf(stderr, "password for user %s\n", user);
637 * Now add the user record we created.
639 putline(ftemp, record);
641 * If we're updating an existing file, there may be additional
642 * records beyond the one we're updating, so copy them.
645 copy_file(ftemp, fpw);
649 * The temporary file now contains the information that should be
650 * in the actual password file. Close the open files, re-open them
651 * in the appropriate mode, and copy them file to the real one.
654 fpw = fopen(pwfilename, "w+");
655 ftemp = fopen(tempfilename, "r");
656 copy_file(fpw, ftemp);
659 unlink(tempfilename);