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// Copyright (C) 2010 David Sugar, Tycho Softworks.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include <sipwitch-config.h>
#include <ucommon/ucommon.h>
#include <ucommon/secure.h>
#include <sipwitch/sipwitch.h>
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
using namespace UCOMMON_NAMESPACE;
using namespace SIPWITCH_NAMESPACE;
#ifdef _MSWINDOWS_
#include <io.h>
static char *getpass(const char *prompt)
{
static char buf[128];
size_t i;
fputs(prompt, stderr);
fflush(stderr);
for (i = 0; i < sizeof(buf) - 1; i++) {
buf[i] = fgetc(stdin);
if (buf[i] == '\r' || buf[i] == '\n')
break;
fputs("*", stderr);
fflush(stderr);
}
buf[i] = 0;
fputs("\n", stderr);
fflush(stderr);
return buf;
}
#endif
PROGRAM_MAIN(argc, argv)
{
char *realm = NULL, *secret, *verify;
const char *mode = "md5";
char buffer[128];
char replace[128];
string_t digestbuf;
fpos_t pos;
FILE *fp;
#ifdef _MSWINDOWS_
const char *control = "\\\\.\\mailslot\\sipwitch_ctrl";
#else
const char *control = DEFAULT_VARPATH "/run/sipwitch/control";
#endif
const char *user = *(++argv);
if(String::equal(user, "-version")) {
printf("sippasswd 0.1\n"
"Copyright (C) 2010 David Sugar, Tycho Softworks\n"
"License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n"
"This is free software: you are free to change and redistribute it.\n"
"There is NO WARRANTY, to the extent permitted by law.\n");
exit(0);
}
#ifdef HAVE_PWD_H
if(user && getuid() != 0)
shell::errexit(3, "*** sippasswd: only root can change other user's digests\n");
if(!user) {
struct passwd *pwd = getpwuid(getuid());
if(!pwd)
shell::errexit(3, "*** sippasswd: user id cannot be determined\n");
user = strdup(pwd->pw_name);
}
if(geteuid() != 0)
shell::errexit(3, "*** sippasswd: root privilege required\n");
#else
if(!user)
shell::errexit(3, "*** sippasswd: user id not specified\n");
#endif
fsys_t fs;
fs.open(DEFAULT_CFGPATH "/siprealm", fsys::RDONLY);
if(!is(fs))
fs.open(DEFAULT_VARPATH "/lib/sipwitch/uuid", fsys::RDONLY);
if(!is(fs))
shell::errexit(4, "*** sippasswd: no realm active\n");
memset(buffer, 0, sizeof(buffer));
fs.read(buffer, sizeof(buffer) - 1);
fs.close();
char *cp = strchr(buffer, '\n');
if(cp)
*cp = 0;
cp = strchr(buffer, ':');
if(cp)
*(cp++) = 0;
if(cp && *cp)
mode = cp;
realm = strdup(buffer);
secret = getpass("Enter new SIP secret: ");
if(!secret || !*secret) {
printf("no password supplied\n");
exit(0);
}
verify = getpass("Retype new SIP secret: ");
if(!verify || !*verify || !String::equal(secret, verify)) {
printf("sorry, secrets do not match\n");
exit(0);
}
digest_t digest = mode;
if(!digest.puts((string_t)user + ":" + (string_t)realm + ":" + (string_t)secret))
shell::errexit(1, "*** sippasswd: cannot compute");
else
digestbuf = *digest;
snprintf(replace, sizeof(replace), "%s:%s\n", user, *digestbuf);
// create work directory if it does not exist
dir::create(DEFAULT_VARPATH "/lib/sipwitch", fsys::GROUP_PRIVATE);
// make sure always created root only
fs.open(DEFAULT_VARPATH "/lib/sipwitch/digests.db", fsys::OWNER_PRIVATE,
fsys::RDONLY);
fs.close();
fp = fopen(DEFAULT_VARPATH "/lib/sipwitch/digests.db", "r+");
if(!fp)
shell::errexit(1, "*** sippasswd: cannot access digest");
for(;;) {
fgetpos(fp, &pos);
if(NULL == fgets(buffer, sizeof(buffer), fp) || feof(fp))
break;
if(String::equal(buffer, replace)) {
fclose(fp);
printf("digest unchanged\n");
exit(0);
}
cp = strchr(buffer, ':');
if(!cp)
continue;
*cp = 0;
if(String::equal(buffer, user))
break;
}
// update digest file
fsetpos(fp, &pos);
fputs(replace, fp);
fclose(fp);
// if server is up, also sync server with digest change...
fp = fopen(control, "w");
if(fp) {
fprintf(fp, "digest %s %s\n", user, *digestbuf);
fclose(fp);
}
printf("digest updated\n");
PROGRAM_EXIT(0);
}
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