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- /* ====================================================================
- * Copyright (c) 1995-1999 The Apache Group. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Group.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Group and was originally based
- * on public domain software written at the National Center for
- * Supercomputing Applications, University of Illinois, Urbana-Champaign.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- */
-
- /******************************************************************************
- ******************************************************************************
- * NOTE! This program is not safe as a setuid executable! Do not make it
- * setuid!
- ******************************************************************************
- *****************************************************************************/
- /*
- * htpasswd.c: simple program for manipulating password file for
- * the Apache HTTP server
- *
- * Originally by Rob McCool
- *
- * Exit values:
- * 0: Success
- * 1: Failure; file access/permission problem
- * 2: Failure; command line syntax problem (usage message issued)
- * 3: Failure; password verification failure
- * 4: Failure; operation interrupted (such as with CTRL/C)
- * 5: Failure; buffer would overflow (username, filename, or computed
- * record too long)
- */
-
- #include "ap_config.h"
- #include <sys/types.h>
- #include <signal.h>
- #include <errno.h>
- #include "ap.h"
- #include "ap_md5.h"
-
- #ifdef WIN32
- #include <conio.h>
- #include "../os/win32/getopt.h"
- #define unlink _unlink
- #endif
-
- #ifndef CHARSET_EBCDIC
- #define LF 10
- #define CR 13
- #else /*CHARSET_EBCDIC*/
- #define LF '\n'
- #define CR '\r'
- #endif /*CHARSET_EBCDIC*/
-
- #define MAX_STRING_LEN 256
- #define ALG_CRYPT 1
- #define ALG_APMD5 2
-
- #define ERR_FILEPERM 1
- #define ERR_SYNTAX 2
- #define ERR_PWMISMATCH 3
- #define ERR_INTERRUPTED 4
- #define ERR_OVERFLOW 5
-
- /*
- * This needs to be declared statically so the signal handler can
- * access it.
- */
- static char *tempfilename;
-
- /*
- * Duplicate a string into memory malloc()ed for it.
- */
- static char *strd(char *s)
- {
- char *d;
-
- d = (char *) malloc(strlen(s) + 1);
- strcpy(d, s);
- return (d);
- }
-
- static int getline(char *s, int n, FILE *f)
- {
- register int i = 0;
-
- while (1) {
- s[i] = (char) fgetc(f);
-
- if (s[i] == CR) {
- s[i] = fgetc(f);
- }
-
- if ((s[i] == 0x4) || (s[i] == LF) || (i == (n - 1))) {
- s[i] = '\0';
- return (feof(f) ? 1 : 0);
- }
- ++i;
- }
- }
-
- static void putline(FILE *f, char *l)
- {
- int x;
-
- for (x = 0; l[x]; x++) {
- fputc(l[x], f);
- }
- fputc('\n', f);
- }
-
-
- /* From local_passwd.c (C) Regents of Univ. of California blah blah */
- static unsigned char itoa64[] = /* 0 ... 63 => ascii - 64 */
- "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
-
- static void to64(register char *s, register long v, register int n)
- {
- while (--n >= 0) {
- *s++ = itoa64[v & 0x3f];
- v >>= 6;
- }
- }
-
- #ifdef MPE
- /*
- * MPE lacks getpass() and a way to suppress stdin echo. So for now, just
- * issue the prompt and read the results with echo. (Ugh).
- */
-
- static char *getpass(const char *prompt)
- {
- static char password[81];
-
- fputs(prompt, stderr);
- gets((char *) &password);
-
- if (strlen((char *) &password) > 8) {
- password[8] = '\0';
- }
-
- return (char *) &password;
- }
-
- #endif
-
- #ifdef WIN32
- /*
- * Windows lacks getpass(). So we'll re-implement it here.
- */
-
- static char *getpass(const char *prompt)
- {
- static char password[81];
- int n = 0;
-
- fputs(prompt, stderr);
-
- while ((password[n] = _getch()) != '\r') {
- if (password[n] >= ' ' && password[n] <= '~') {
- n++;
- printf("*");
- }
- else {
- printf("\n");
- fputs(prompt, stderr);
- n = 0;
- }
- }
-
- password[n] = '\0';
- printf("\n");
-
- if (n > 8) {
- password[8] = '\0';
- }
-
- return (char *) &password;
- }
- #endif
-
- /*
- * Make a password record from the given information. A zero return
- * indicates success; failure means that the output buffer contains an
- * error message instead.
- */
- static int mkrecord(char *user, char *record, size_t rlen, int alg)
- {
- char *pw;
- char cpw[120];
- char salt[9];
-
- pw = strd((char *) getpass("New password: "));
- if (strcmp(pw, (char *) getpass("Re-type new password: "))) {
- ap_cpystrn(record, "password verification error", (rlen - 1));
- return ERR_PWMISMATCH;
- }
- (void) srand((int) time((time_t *) NULL));
- to64(&salt[0], rand(), 8);
- salt[8] = '\0';
-
- switch (alg) {
- case ALG_APMD5:
- ap_MD5Encode(pw, salt, cpw, sizeof(cpw));
- break;
- case ALG_CRYPT:
- ap_cpystrn(cpw, (char *)crypt(pw, salt), sizeof(cpw) - 1);
- break;
- }
- /*
- * Now that we have the smashed password, we don't need the
- * plaintext one any more.
- */
- free(pw);
- /*
- * Check to see if the buffer is large enough to hold the username,
- * hash, and delimiters.
- */
- if ((strlen(user) + 1 + strlen(cpw)) > (rlen - 1)) {
- ap_cpystrn(record, "resultant record too long", (rlen - 1));
- return ERR_OVERFLOW;
- }
- strcpy(record, user);
- strcat(record, ":");
- strcat(record, cpw);
- return 0;
- }
-
- static int usage(void)
- {
- fprintf(stderr, "Usage: htpasswd [-cm] passwordfile username\n");
- fprintf(stderr, "The -c flag creates a new file.\n");
- fprintf(stderr, "The -m flag forces MD5 encryption of the password.\n");
- fprintf(stderr, "On Windows systems the -m flag is used by default.\n");
- return ERR_SYNTAX;
- }
-
- static void interrupted(void)
- {
- fprintf(stderr, "Interrupted.\n");
- if (tempfilename != NULL) {
- unlink(tempfilename);
- }
- exit(ERR_INTERRUPTED);
- }
-
- /*
- * Check to see if the specified file can be opened for the given
- * access.
- */
- static int accessible(char *fname, char *mode)
- {
- FILE *s;
-
- s = fopen(fname, mode);
- if (s == NULL) {
- return 0;
- }
- fclose(s);
- return 1;
- }
-
- /*
- * Return true if a file is readable.
- */
- static int readable(char *fname)
- {
- return accessible(fname, "r");
- }
-
- /*
- * Return true if the specified file can be opened for write access.
- */
- static int writable(char *fname)
- {
- return accessible(fname, "a");
- }
-
- /*
- * Return true if the named file exists, regardless of permissions.
- */
- static int exists(char *fname)
- {
- #ifdef WIN32
- struct _stat sbuf;
- #else
- struct stat sbuf;
- #endif
- int check;
-
- #ifdef WIN32
- check = _stat(fname, &sbuf);
- #else
- check = stat(fname, &sbuf);
- #endif
- return ((check == -1) && (errno == ENOENT)) ? 0 : 1;
- }
-
- /*
- * Copy from the current position of one file to the current position
- * of another.
- */
- static void copy_file(FILE *target, FILE *source)
- {
- static char line[MAX_STRING_LEN];
-
- while (fgets(line, sizeof(line), source) != NULL) {
- fputs(line, target);
- }
- }
-
- /*
- * Let's do it. We end up doing a lot of file opening and closing,
- * but what do we care? This application isn't run constantly.
- */
- int main(int argc, char *argv[])
- {
- FILE *ftemp = NULL;
- FILE *fpw = NULL;
- char user[MAX_STRING_LEN];
- char record[MAX_STRING_LEN];
- char line[MAX_STRING_LEN];
- char pwfilename[MAX_STRING_LEN];
- char *arg;
- int found = 0;
- int alg = ALG_CRYPT;
- int newfile = 0;
- int i;
-
- tempfilename = NULL;
- signal(SIGINT, (void (*)(int)) interrupted);
-
- /*
- * Preliminary check to make sure they provided at least
- * three arguments, we'll do better argument checking as
- * we parse the command line.
- */
- if (argc < 3) {
- return usage();
- }
-
- /*
- * Go through the argument list and pick out any options. They
- * have to precede any other arguments.
- */
- for (i = 1; i < argc; i++) {
- arg = argv[i];
- if (*arg != '-') {
- break;
- }
- while (*++arg != '\0') {
- if (*arg == 'c') {
- newfile++;
- }
- else if (*arg == 'm') {
- alg = ALG_APMD5;
- }
- else {
- return usage();
- }
- }
- }
-
- /*
- * Make sure we still have exactly two arguments left (the filename
- * and the username).
- */
- if ((argc - i) != 2) {
- return usage();
- }
- if (strlen(argv[i]) > (sizeof(pwfilename) - 1)) {
- fprintf(stderr, "%s: filename too long\n", argv[0]);
- return ERR_OVERFLOW;
- }
- strcpy(pwfilename, argv[i]);
- if (strlen(argv[i + 1]) > (sizeof(user) - 1)) {
- fprintf(stderr, "%s: username too long\n", argv[0]);
- return ERR_OVERFLOW;
- }
- strcpy(user, argv[i + 1]);
-
- #ifdef WIN32
- if (alg == ALG_CRYPT) {
- alg = ALG_APMD5;
- fprintf(stderr, "Automatically using MD5 format on Windows.\n");
- }
- #endif
-
- /*
- * Verify that the file exists if -c was omitted. We give a special
- * message if it doesn't.
- */
- if ((! newfile) && (! exists(pwfilename))) {
- fprintf(stderr, "%s: cannot modify file %s; use '-c' to create it\n",
- argv[0], pwfilename);
- perror("fopen");
- exit(ERR_FILEPERM);
- }
- /*
- * Verify that we can read the existing file in the case of an update
- * to it (rather than creation of a new one).
- */
- if ((! newfile) && (! readable(pwfilename))) {
- fprintf(stderr, "%s: cannot open file %s for read access\n",
- argv[0], pwfilename);
- perror("fopen");
- exit(ERR_FILEPERM);
- }
- /*
- * Now check to see if we can preserve an existing file in case
- * of password verification errors on a -c operation.
- */
- if (newfile && exists(pwfilename) && (! readable(pwfilename))) {
- fprintf(stderr, "%s: cannot open file %s for read access\n"
- "%s: existing auth data would be lost on password mismatch",
- argv[0], pwfilename, argv[0]);
- perror("fopen");
- exit(ERR_FILEPERM);
- }
- /*
- * Now verify that the file is writable!
- */
- if (! writable(pwfilename)) {
- fprintf(stderr, "%s: cannot open file %s for write access\n",
- argv[0], pwfilename);
- perror("fopen");
- exit(ERR_FILEPERM);
- }
-
- /*
- * All the file access checks have been made. Time to go to work;
- * try to create the record for the username in question. If that
- * fails, there's no need to waste any time on file manipulations.
- * Any error message text is returned in the record buffer, since
- * the mkrecord() routine doesn't have access to argv[].
- */
- if ((i = mkrecord(user, record, sizeof(record) - 1, alg)) != 0) {
- fprintf(stderr, "%s: %s\n", argv[0], record);
- exit(i);
- }
-
- /*
- * We can access the files the right way, and we have a record
- * to add or update. Let's do it..
- */
- tempfilename = tmpnam(NULL);
- ftemp = fopen(tempfilename, "w+");
- if (ftemp == NULL) {
- fprintf(stderr, "%s: unable to create temporary file\n", argv[0]);
- perror("fopen");
- exit(ERR_FILEPERM);
- }
- /*
- * If we're not creating a new file, copy records from the existing
- * one to the temporary file until we find the specified user.
- */
- if (! newfile) {
- char scratch[MAX_STRING_LEN];
-
- fpw = fopen(pwfilename, "r");
- while (! (getline(line, sizeof(line), fpw))) {
- char *colon;
-
- if ((line[0] == '#') || (line[0] == '\0')) {
- putline(ftemp, line);
- continue;
- }
- strcpy(scratch, line);
- /*
- * See if this is our user.
- */
- colon = strchr(scratch, ':');
- if (colon != NULL) {
- *colon = '\0';
- }
- if (strcmp(user, scratch) != 0) {
- putline(ftemp, line);
- continue;
- }
- found++;
- break;
- }
- }
- if (found) {
- fprintf(stderr, "Updating ");
- }
- else {
- fprintf(stderr, "Adding ");
- }
- fprintf(stderr, "password for user %s\n", user);
- /*
- * Now add the user record we created.
- */
- putline(ftemp, record);
- /*
- * If we're updating an existing file, there may be additional
- * records beyond the one we're updating, so copy them.
- */
- if (! newfile) {
- copy_file(ftemp, fpw);
- fclose(fpw);
- }
- /*
- * The temporary file now contains the information that should be
- * in the actual password file. Close the open files, re-open them
- * in the appropriate mode, and copy them file to the real one.
- */
- fclose(ftemp);
- fpw = fopen(pwfilename, "w+");
- ftemp = fopen(tempfilename, "r");
- copy_file(fpw, ftemp);
- fclose(fpw);
- fclose(ftemp);
- unlink(tempfilename);
- return 0;
- }
-