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
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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"
92 #define unlink _unlink
95 #ifndef CHARSET_EBCDIC
98 #else /*CHARSET_EBCDIC*/
101 #endif /*CHARSET_EBCDIC*/
103 #define MAX_STRING_LEN 256
109 #define ERR_FILEPERM 1
111 #define ERR_PWMISMATCH 3
112 #define ERR_INTERRUPTED 4
113 #define ERR_OVERFLOW 5
114 #define ERR_BADUSER 6
117 * This needs to be declared statically so the signal handler can
120 static char *tempfilename;
123 * Get a line of input from the user, not including any terminating
126 static int getline(char *s, int n, FILE *f)
131 s[i] = (char) fgetc(f);
137 if ((s[i] == 0x4) || (s[i] == LF) || (i == (n - 1))) {
139 return (feof(f) ? 1 : 0);
145 static void putline(FILE *f, char *l)
149 for (x = 0; l[x]; x++) {
155 static void to64(char *s, unsigned long v, int n)
157 static unsigned char itoa64[] = /* 0 ... 63 => ASCII - 64 */
158 "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
161 *s++ = itoa64[v&0x3f];
167 * Make a password record from the given information. A zero return
168 * indicates success; failure means that the output buffer contains an
169 * error message instead.
171 static int mkrecord(char *user, char *record, size_t rlen, char *passwd,
176 char pwin[MAX_STRING_LEN];
177 char pwv[MAX_STRING_LEN];
181 if (passwd != NULL) {
185 bufsize = sizeof(pwin);
186 if (ap_getpass("New password: ", pwin, &bufsize) != 0) {
187 ap_snprintf(record, (rlen - 1), "password too long (>%d)",
191 bufsize = sizeof(pwv);
192 ap_getpass("Re-type new password: ", pwv, &bufsize);
193 if (strcmp(pwin, pwv) != 0) {
194 ap_cpystrn(record, "password verification error", (rlen - 1));
195 return ERR_PWMISMATCH;
198 memset(pwv, '\0', sizeof(pwin));
203 /* XXX cpw >= 28 + strlen(sha1) chars - fixed len SHA */
204 ap_sha1_base64(pw,strlen(pw),cpw);
208 (void) srand((int) time((time_t *) NULL));
209 to64(&salt[0], rand(), 8);
212 ap_MD5Encode((const unsigned char *)pw, (const unsigned char *)salt,
217 /* XXX this len limitation is not in sync with any HTTPd len. */
218 ap_cpystrn(cpw,pw,sizeof(cpw));
223 (void) srand((int) time((time_t *) NULL));
224 to64(&salt[0], rand(), 8);
227 ap_cpystrn(cpw, (char *)crypt(pw, salt), sizeof(cpw) - 1);
230 memset(pw, '\0', strlen(pw));
233 * Check to see if the buffer is large enough to hold the username,
234 * hash, and delimiters.
236 if ((strlen(user) + 1 + strlen(cpw)) > (rlen - 1)) {
237 ap_cpystrn(record, "resultant record too long", (rlen - 1));
240 strcpy(record, user);
246 static int usage(void)
248 fprintf(stderr, "Usage:\n");
249 fprintf(stderr, "\thtpasswd [-cmdps] passwordfile username\n");
250 fprintf(stderr, "\thtpasswd -b[cmdps] passwordfile username password\n\n");
251 fprintf(stderr, " -c Create a new file.\n");
252 fprintf(stderr, " -m Force MD5 encryption of the password"
253 #if defined(WIN32) || defined(TPF)
257 fprintf(stderr, " -d Force CRYPT encryption of the password"
258 #if (!(defined(WIN32) || defined(TPF)))
262 fprintf(stderr, " -p Do not encrypt the password (plaintext).\n");
263 fprintf(stderr, " -s Force SHA encryption of the password.\n");
264 fprintf(stderr, " -b Use the password from the command line rather "
265 "than prompting for it.\n");
267 "On Windows and TPF systems the '-m' flag is used by default.\n");
269 "On all other systems, the '-p' flag will probably not work.\n");
273 static void interrupted(void)
275 fprintf(stderr, "Interrupted.\n");
276 if (tempfilename != NULL) {
277 unlink(tempfilename);
279 exit(ERR_INTERRUPTED);
283 * Check to see if the specified file can be opened for the given
286 static int accessible(char *fname, char *mode)
290 s = fopen(fname, mode);
299 * Return true if a file is readable.
301 static int readable(char *fname)
303 return accessible(fname, "r");
307 * Return true if the specified file can be opened for write access.
309 static int writable(char *fname)
311 return accessible(fname, "a");
315 * Return true if the named file exists, regardless of permissions.
317 static int exists(char *fname)
327 check = _stat(fname, &sbuf);
329 check = stat(fname, &sbuf);
331 return ((check == -1) && (errno == ENOENT)) ? 0 : 1;
335 * Copy from the current position of one file to the current position
338 static void copy_file(FILE *target, FILE *source)
340 static char line[MAX_STRING_LEN];
342 while (fgets(line, sizeof(line), source) != NULL) {
348 * Let's do it. We end up doing a lot of file opening and closing,
349 * but what do we care? This application isn't run constantly.
351 int main(int argc, char *argv[])
355 char user[MAX_STRING_LEN];
356 char password[MAX_STRING_LEN];
357 char record[MAX_STRING_LEN];
358 char line[MAX_STRING_LEN];
359 char pwfilename[MAX_STRING_LEN];
364 int noninteractive = 0;
369 signal(SIGINT, (void (*)(int)) interrupted);
372 * Preliminary check to make sure they provided at least
373 * three arguments, we'll do better argument checking as
374 * we parse the command line.
381 * Go through the argument list and pick out any options. They
382 * have to precede any other arguments.
384 for (i = 1; i < argc; i++) {
389 while (*++arg != '\0') {
393 else if (*arg == 'm') {
396 else if (*arg == 's') {
399 else if (*arg == 'p') {
402 else if (*arg == 'd') {
405 else if (*arg == 'b') {
416 * Make sure we still have exactly the right number of arguments left
417 * (the filename, the username, and possibly the password if -b was
420 if ((argc - i) != args_left) {
423 if (strlen(argv[i]) > (sizeof(pwfilename) - 1)) {
424 fprintf(stderr, "%s: filename too long\n", argv[0]);
427 strcpy(pwfilename, argv[i]);
428 if (strlen(argv[i + 1]) > (sizeof(user) - 1)) {
429 fprintf(stderr, "%s: username too long (>%d)\n", argv[0],
433 strcpy(user, argv[i + 1]);
434 if ((arg = strchr(user, ':')) != NULL) {
435 fprintf(stderr, "%s: username contains illegal character '%c'\n",
439 if (noninteractive) {
440 if (strlen(argv[i + 2]) > (sizeof(password) - 1)) {
441 fprintf(stderr, "%s: password too long (>%d)\n", argv[0],
442 sizeof(password) - 1);
445 strcpy(password, argv[i + 2]);
449 if (alg == ALG_CRYPT) {
451 fprintf(stderr, "Automatically using MD5 format on Windows.\n");
455 #if (!(defined(WIN32) || defined(TPF)))
456 if (alg == ALG_PLAIN) {
457 fprintf(stderr,"Warning: storing passwords as plain text might "
458 "just not work on this platform.\n");
462 * Verify that the file exists if -c was omitted. We give a special
463 * message if it doesn't.
465 if ((! newfile) && (! exists(pwfilename))) {
466 fprintf(stderr, "%s: cannot modify file %s; use '-c' to create it\n",
467 argv[0], pwfilename);
472 * Verify that we can read the existing file in the case of an update
473 * to it (rather than creation of a new one).
475 if ((! newfile) && (! readable(pwfilename))) {
476 fprintf(stderr, "%s: cannot open file %s for read access\n",
477 argv[0], pwfilename);
482 * Now check to see if we can preserve an existing file in case
483 * of password verification errors on a -c operation.
485 if (newfile && exists(pwfilename) && (! readable(pwfilename))) {
486 fprintf(stderr, "%s: cannot open file %s for read access\n"
487 "%s: existing auth data would be lost on password mismatch",
488 argv[0], pwfilename, argv[0]);
493 * Now verify that the file is writable!
495 if (! writable(pwfilename)) {
496 fprintf(stderr, "%s: cannot open file %s for write access\n",
497 argv[0], pwfilename);
503 * All the file access checks have been made. Time to go to work;
504 * try to create the record for the username in question. If that
505 * fails, there's no need to waste any time on file manipulations.
506 * Any error message text is returned in the record buffer, since
507 * the mkrecord() routine doesn't have access to argv[].
509 i = mkrecord(user, record, sizeof(record) - 1,
510 noninteractive ? password : NULL,
513 fprintf(stderr, "%s: %s\n", argv[0], record);
518 * We can access the files the right way, and we have a record
519 * to add or update. Let's do it..
521 tempfilename = tmpnam(NULL);
522 ftemp = fopen(tempfilename, "w+");
524 fprintf(stderr, "%s: unable to create temporary file\n", argv[0]);
529 * If we're not creating a new file, copy records from the existing
530 * one to the temporary file until we find the specified user.
533 char scratch[MAX_STRING_LEN];
535 fpw = fopen(pwfilename, "r");
536 while (! (getline(line, sizeof(line), fpw))) {
539 if ((line[0] == '#') || (line[0] == '\0')) {
540 putline(ftemp, line);
543 strcpy(scratch, line);
545 * See if this is our user.
547 colon = strchr(scratch, ':');
551 if (strcmp(user, scratch) != 0) {
552 putline(ftemp, line);
560 fprintf(stderr, "Updating ");
563 fprintf(stderr, "Adding ");
565 fprintf(stderr, "password for user %s\n", user);
567 * Now add the user record we created.
569 putline(ftemp, record);
571 * If we're updating an existing file, there may be additional
572 * records beyond the one we're updating, so copy them.
575 copy_file(ftemp, fpw);
579 * The temporary file now contains the information that should be
580 * in the actual password file. Close the open files, re-open them
581 * in the appropriate mode, and copy them file to the real one.
584 fpw = fopen(pwfilename, "w+");
585 ftemp = fopen(tempfilename, "r");
586 copy_file(fpw, ftemp);
589 unlink(tempfilename);