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/* $OpenBSD: htdigest.c,v 1.13 2012/03/04 04:05:15 fgsch Exp $ */
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2003 The Apache Software Foundation. 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. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" 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 name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``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 SOFTWARE FOUNDATION 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 Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
/******************************************************************************
******************************************************************************
* NOTE! This program is not safe as a setuid executable! Do not make it
* setuid!
******************************************************************************
*****************************************************************************/
/*
* htdigest.c: simple program for manipulating digest passwd file for Apache
*
* by Alexei Kosut, based on htpasswd.c, by Rob McCool
*/
#include <sys/types.h>
#include <sys/signal.h>
#include "ap_config.h"
#include "ap.h"
#include "ap_md5.h"
#define LF 10
#define CR 13
#define MAX_STRING_LEN 256
#define INTR_MSG "\nInterrupted.\n"
static char tn[MAX_STRING_LEN];
static void
getword(char *word, char *line, char stop)
{
int x = 0, y;
for (x = 0; ((line[x]) && (line[x] != stop)); x++)
word[x] = line[x];
word[x] = '\0';
if (line[x])
++x;
y = 0;
while ((line[y++] = line[x++]));
}
static int
get_line(char *s, int n, FILE *f)
{
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);
}
static void
add_password(char *user, char *realm, FILE *f)
{
char *pw;
AP_MD5_CTX context;
unsigned char digest[16];
char string[MAX_STRING_LEN];
char pwin[MAX_STRING_LEN];
char pwv[MAX_STRING_LEN];
unsigned int i;
if (ap_getpass("New password: ", pwin, sizeof(pwin)) != 0) {
fprintf(stderr, "password too long");
exit(5);
}
ap_getpass("Re-type new password: ", pwv, sizeof(pwv));
if (strcmp(pwin, pwv) != 0) {
fprintf(stderr, "They don't match, sorry.\n");
if (tn[0] != '\0')
unlink(tn);
exit(1);
}
pw = pwin;
fprintf(f, "%s:%s:", user, realm);
/* Do MD5 stuff */
snprintf(string, sizeof(string), "%s:%s:%s", user, realm, pw);
ap_MD5Init(&context);
ap_MD5Update(&context, (unsigned char *) string, strlen(string));
ap_MD5Final(digest, &context);
for (i = 0; i < 16; i++)
fprintf(f, "%02x", digest[i]);
fprintf(f, "\n");
}
static void
usage(void)
{
fprintf(stderr, "Usage: htdigest [-c] passwordfile realm username\n");
fprintf(stderr, "The -c flag creates a new file.\n");
exit(1);
}
static void
interrupted(void)
{
write(STDERR_FILENO, INTR_MSG, sizeof(INTR_MSG) - 1);
if (tn[0] != '\0')
unlink(tn);
_exit(1);
}
int main(int argc, char *argv[])
{
FILE *tfp, *f;
char user[MAX_STRING_LEN];
char realm[MAX_STRING_LEN];
char line[MAX_STRING_LEN];
char l[MAX_STRING_LEN];
char w[MAX_STRING_LEN];
char x[MAX_STRING_LEN];
char command[MAX_STRING_LEN];
int found;
int tfd;
signal(SIGINT, (void (*)(int)) interrupted);
if (argc == 5) {
if (strcmp(argv[1], "-c"))
usage();
if (!(tfp = fopen(argv[2], "w"))) {
fprintf(stderr, "Could not open passwd file %s for writing.\n",
argv[2]);
perror("fopen");
exit(1);
}
printf("Adding password for %s in realm %s.\n", argv[4], argv[3]);
add_password(argv[4], argv[3], tfp);
fclose(tfp);
exit(0);
}
else if (argc != 4)
usage();
strlcpy(tn, "/tmp/htdigest-XXXXXXXXXX", sizeof(tn));
tfd = mkstemp(tn);
if (tfd == -1 || (tfp = fdopen(tfd, "w")) == NULL) {
fprintf(stderr, "Could not create temp file.\n");
exit(1);
}
if (!(f = fopen(argv[1], "r"))) {
fprintf(stderr,
"Could not open passwd file %s for reading.\n", argv[1]);
fprintf(stderr, "Use -c option to create new one.\n");
exit(1);
}
ap_cpystrn(user, argv[3], sizeof(user));
ap_cpystrn(realm, argv[2], sizeof(realm));
found = 0;
while (!(get_line(line, MAX_STRING_LEN, f))) {
if (found || (line[0] == '#') || (!line[0])) {
putline(tfp, line);
continue;
}
strlcpy(l, line, sizeof(l));
getword(w, l, ':');
getword(x, l, ':');
if (strcmp(user, w) || strcmp(realm, x)) {
putline(tfp, line);
continue;
}
else {
printf("Changing password for user %s in realm %s\n", user, realm);
add_password(user, realm, tfp);
found = 1;
}
}
if (!found) {
printf("Adding user %s in realm %s\n", user, realm);
add_password(user, realm, tfp);
}
fclose(f);
fclose(tfp);
snprintf(command, sizeof(command), "cp %s %s", tn, argv[1]);
system(command);
unlink(tn);
return 0;
}
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