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,
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41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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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
83 #include "ap_config.h"
84 #include <sys/types.h>
93 #define unlink _unlink
96 #ifndef CHARSET_EBCDIC
99 #else /*CHARSET_EBCDIC*/
102 #endif /*CHARSET_EBCDIC*/
104 #define MAX_STRING_LEN 256
110 #define ERR_FILEPERM 1
112 #define ERR_PWMISMATCH 3
113 #define ERR_INTERRUPTED 4
114 #define ERR_OVERFLOW 5
115 #define ERR_BADUSER 6
118 * This needs to be declared statically so the signal handler can
121 static char *tempfilename;
124 * Get a line of input from the user, not including any terminating
127 static int getline(char *s, int n, FILE *f)
132 s[i] = (char) fgetc(f);
138 if ((s[i] == 0x4) || (s[i] == LF) || (i == (n - 1))) {
140 return (feof(f) ? 1 : 0);
146 static void putline(FILE *f, char *l)
150 for (x = 0; l[x]; x++) {
156 static void to64(char *s, unsigned long v, int n)
158 static unsigned char itoa64[] = /* 0 ... 63 => ASCII - 64 */
159 "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
162 *s++ = itoa64[v&0x3f];
168 * Make a password record from the given information. A zero return
169 * indicates success; failure means that the output buffer contains an
170 * error message instead.
172 static int mkrecord(char *user, char *record, size_t rlen, char *passwd,
177 char pwin[MAX_STRING_LEN];
178 char pwv[MAX_STRING_LEN];
182 if (passwd != NULL) {
186 bufsize = sizeof(pwin);
187 if (ap_getpass("New password: ", pwin, &bufsize) != 0) {
188 ap_snprintf(record, (rlen - 1), "password too long (>%d)",
192 bufsize = sizeof(pwv);
193 ap_getpass("Re-type new password: ", pwv, &bufsize);
194 if (strcmp(pwin, pwv) != 0) {
195 ap_cpystrn(record, "password verification error", (rlen - 1));
196 return ERR_PWMISMATCH;
199 memset(pwv, '\0', sizeof(pwin));
204 /* XXX cpw >= 28 + strlen(sha1) chars - fixed len SHA */
205 ap_sha1_base64(pw,strlen(pw),cpw);
209 (void) srand((int) time((time_t *) NULL));
210 to64(&salt[0], rand(), 8);
213 ap_MD5Encode((const unsigned char *)pw, (const unsigned char *)salt,
218 /* XXX this len limitation is not in sync with any HTTPd len. */
219 ap_cpystrn(cpw,pw,sizeof(cpw));
224 (void) srand((int) time((time_t *) NULL));
225 to64(&salt[0], rand(), 8);
228 ap_cpystrn(cpw, (char *)crypt(pw, salt), sizeof(cpw) - 1);
231 memset(pw, '\0', strlen(pw));
234 * Check to see if the buffer is large enough to hold the username,
235 * hash, and delimiters.
237 if ((strlen(user) + 1 + strlen(cpw)) > (rlen - 1)) {
238 ap_cpystrn(record, "resultant record too long", (rlen - 1));
241 strcpy(record, user);
247 static int usage(void)
249 fprintf(stderr, "Usage:\n");
250 fprintf(stderr, "\thtpasswd [-cmdps] passwordfile username\n");
251 fprintf(stderr, "\thtpasswd -b[cmdps] passwordfile username password\n\n");
252 fprintf(stderr, " -c Create a new file.\n");
253 fprintf(stderr, " -m Force MD5 encryption of the password"
254 #if defined(WIN32) || defined(TPF)
258 fprintf(stderr, " -d Force CRYPT encryption of the password"
259 #if (!(defined(WIN32) || defined(TPF)))
263 fprintf(stderr, " -p Do not encrypt the password (plaintext).\n");
264 fprintf(stderr, " -s Force SHA encryption of the password.\n");
265 fprintf(stderr, " -b Use the password from the command line rather "
266 "than prompting for it.\n");
268 "On Windows and TPF systems the '-m' flag is used by default.\n");
270 "On all other systems, the '-p' flag will probably not work.\n");
274 static void interrupted(void)
276 fprintf(stderr, "Interrupted.\n");
277 if (tempfilename != NULL) {
278 unlink(tempfilename);
280 exit(ERR_INTERRUPTED);
284 * Check to see if the specified file can be opened for the given
287 static int accessible(char *fname, char *mode)
291 s = fopen(fname, mode);
300 * Return true if a file is readable.
302 static int readable(char *fname)
304 return accessible(fname, "r");
308 * Return true if the specified file can be opened for write access.
310 static int writable(char *fname)
312 return accessible(fname, "a");
316 * Return true if the named file exists, regardless of permissions.
318 static int exists(char *fname)
328 check = _stat(fname, &sbuf);
330 check = stat(fname, &sbuf);
332 return ((check == -1) && (errno == ENOENT)) ? 0 : 1;
336 * Copy from the current position of one file to the current position
339 static void copy_file(FILE *target, FILE *source)
341 static char line[MAX_STRING_LEN];
343 while (fgets(line, sizeof(line), source) != NULL) {
349 * Let's do it. We end up doing a lot of file opening and closing,
350 * but what do we care? This application isn't run constantly.
352 int main(int argc, char *argv[])
356 char user[MAX_STRING_LEN];
357 char password[MAX_STRING_LEN];
358 char record[MAX_STRING_LEN];
359 char line[MAX_STRING_LEN];
360 char pwfilename[MAX_STRING_LEN];
365 int noninteractive = 0;
370 signal(SIGINT, (void (*)(int)) interrupted);
373 * Preliminary check to make sure they provided at least
374 * three arguments, we'll do better argument checking as
375 * we parse the command line.
382 * Go through the argument list and pick out any options. They
383 * have to precede any other arguments.
385 for (i = 1; i < argc; i++) {
390 while (*++arg != '\0') {
394 else if (*arg == 'm') {
397 else if (*arg == 's') {
400 else if (*arg == 'p') {
403 else if (*arg == 'd') {
406 else if (*arg == 'b') {
417 * Make sure we still have exactly the right number of arguments left
418 * (the filename, the username, and possibly the password if -b was
421 if ((argc - i) != args_left) {
424 if (strlen(argv[i]) > (sizeof(pwfilename) - 1)) {
425 fprintf(stderr, "%s: filename too long\n", argv[0]);
428 strcpy(pwfilename, argv[i]);
429 if (strlen(argv[i + 1]) > (sizeof(user) - 1)) {
430 fprintf(stderr, "%s: username too long (>%d)\n", argv[0],
434 strcpy(user, argv[i + 1]);
435 if ((arg = strchr(user, ':')) != NULL) {
436 fprintf(stderr, "%s: username contains illegal character '%c'\n",
440 if (noninteractive) {
441 if (strlen(argv[i + 2]) > (sizeof(password) - 1)) {
442 fprintf(stderr, "%s: password too long (>%d)\n", argv[0],
443 sizeof(password) - 1);
446 strcpy(password, argv[i + 2]);
450 if (alg == ALG_CRYPT) {
452 fprintf(stderr, "Automatically using MD5 format on Windows.\n");
456 #if (!(defined(WIN32) || defined(TPF)))
457 if (alg == ALG_PLAIN) {
458 fprintf(stderr,"Warning: storing passwords as plain text might "
459 "just not work on this platform.\n");
463 * Verify that the file exists if -c was omitted. We give a special
464 * message if it doesn't.
466 if ((! newfile) && (! exists(pwfilename))) {
467 fprintf(stderr, "%s: cannot modify file %s; use '-c' to create it\n",
468 argv[0], pwfilename);
473 * Verify that we can read the existing file in the case of an update
474 * to it (rather than creation of a new one).
476 if ((! newfile) && (! readable(pwfilename))) {
477 fprintf(stderr, "%s: cannot open file %s for read access\n",
478 argv[0], pwfilename);
483 * Now check to see if we can preserve an existing file in case
484 * of password verification errors on a -c operation.
486 if (newfile && exists(pwfilename) && (! readable(pwfilename))) {
487 fprintf(stderr, "%s: cannot open file %s for read access\n"
488 "%s: existing auth data would be lost on password mismatch",
489 argv[0], pwfilename, argv[0]);
494 * Now verify that the file is writable!
496 if (! writable(pwfilename)) {
497 fprintf(stderr, "%s: cannot open file %s for write access\n",
498 argv[0], pwfilename);
504 * All the file access checks have been made. Time to go to work;
505 * try to create the record for the username in question. If that
506 * fails, there's no need to waste any time on file manipulations.
507 * Any error message text is returned in the record buffer, since
508 * the mkrecord() routine doesn't have access to argv[].
510 i = mkrecord(user, record, sizeof(record) - 1,
511 noninteractive ? password : NULL,
514 fprintf(stderr, "%s: %s\n", argv[0], record);
519 * We can access the files the right way, and we have a record
520 * to add or update. Let's do it..
522 tempfilename = tmpnam(NULL);
523 ftemp = fopen(tempfilename, "w+");
525 fprintf(stderr, "%s: unable to create temporary file\n", argv[0]);
530 * If we're not creating a new file, copy records from the existing
531 * one to the temporary file until we find the specified user.
534 char scratch[MAX_STRING_LEN];
536 fpw = fopen(pwfilename, "r");
537 while (! (getline(line, sizeof(line), fpw))) {
540 if ((line[0] == '#') || (line[0] == '\0')) {
541 putline(ftemp, line);
544 strcpy(scratch, line);
546 * See if this is our user.
548 colon = strchr(scratch, ':');
552 if (strcmp(user, scratch) != 0) {
553 putline(ftemp, line);
561 fprintf(stderr, "Updating ");
564 fprintf(stderr, "Adding ");
566 fprintf(stderr, "password for user %s\n", user);
568 * Now add the user record we created.
570 putline(ftemp, record);
572 * If we're updating an existing file, there may be additional
573 * records beyond the one we're updating, so copy them.
576 copy_file(ftemp, fpw);
580 * The temporary file now contains the information that should be
581 * in the actual password file. Close the open files, re-open them
582 * in the appropriate mode, and copy them file to the real one.
585 fpw = fopen(pwfilename, "w+");
586 ftemp = fopen(tempfilename, "r");
587 copy_file(fpw, ftemp);
590 unlink(tempfilename);