/*
* Change a user's password in NetInfo.
*/
PAM_EXTERN
int
pam_sm_chauthtok(pam_handle_t * pamh, int flags, int argc, const char **argv)
{
char *oldHash, *newHash;
char *oldPassword = NULL, *newPassword = NULL;
void *d;
int status, isroot, tries, maxTries;
int options = 0;
int amChangingExpiredPassword;
ni_id dir;
ni_proplist pl;
ni_property p;
ni_namelist nl;
int ni_uid, uid, secure, minlen, lifetime;
ni_index where;
struct pam_conv *appconv;
struct pam_message msg, *pmsg;
struct pam_response *resp;
const char *cmiscptr = NULL;
char *uname;
char salt[9];
int i;
amChangingExpiredPassword = flags & PAM_CHANGE_EXPIRED_AUTHTOK;
status = pam_get_item(pamh, PAM_CONV, (void **) &appconv);
if (status != PAM_SUCCESS)
return status;
status = pam_get_item(pamh, PAM_USER, (void **) &uname);
if (status != PAM_SUCCESS)
return status;
if (uname == NULL)
return PAM_USER_UNKNOWN;
status = pam_get_item(pamh, PAM_OLDAUTHTOK, (void **) &oldPassword);
if (status != PAM_SUCCESS) {
return status;
}
if (pam_test_option(&options, PAM_OPT_USE_FIRST_PASS, NULL) ||
pam_test_option(&options, PAM_OPT_TRY_FIRST_PASS, NULL))
{
if (pam_get_item(pamh, PAM_AUTHTOK, (void **) &newPassword) != PAM_SUCCESS)
newPassword = NULL;
if (pam_test_option(&options, PAM_OPT_USE_FIRST_PASS, NULL) && newPassword == NULL)
return PAM_AUTHTOK_RECOVER_ERR;
}
d = domain_for_user(uname, NULL, &dir);
if (d == (void *) NULL)
{
syslog(LOG_ERR, "user %s not found in NetInfo", uname);
return PAM_USER_UNKNOWN;
}
/*
* These should be configurable in NetInfo.
*/
secure = secure_passwords();
maxTries = secure ? 3 : 5;
minlen = secure ? 8 : 5;
/*
* Read the passwd and uid from NetInfo.
*/
status = ni_lookupprop(d, &dir, "passwd", &nl);
if (status == NI_NOPROP)
nl.ni_namelist_len = 0;
else if (status != NI_OK)
{
ni_free(d);
syslog(LOG_ERR, "NetInfo read failed: %s", ni_error(status));
return netinfo2PamStatus(status);
}
oldHash = NULL;
if (nl.ni_namelist_len > 0)
oldHash = nl.ni_namelist_val[0];
status = ni_lookupprop(d, &dir, "uid", &nl);
if (status != NI_OK)
{
ni_free(d);
syslog(LOG_ERR, "NetInfo read failed: %s", ni_error(status));
return netinfo2PamStatus(status);
}
ni_uid = -2;
if (nl.ni_namelist_len > 0)
ni_uid = atoi(nl.ni_namelist_val[0]);
/*
* See if I'm uid 0 on the master host for the user's NetInfo domain.
*/
isroot = is_root_on_master(d);
uid = getuid();
if (isroot)
{
if (flags & PAM_PRELIM_CHECK)
{
/* Don't need old password. */
return PAM_SUCCESS;
}
}
else if (uid != ni_uid)
{
ni_free(d);
return PAM_PERM_DENIED;
}
if (flags & PAM_PRELIM_CHECK)
{
/*
* If we are not root, we should verify the old
* password.
*/
char *encrypted;
if (oldPassword != NULL &&
(pam_test_option(&options, PAM_OPT_USE_FIRST_PASS, NULL) ||
pam_test_option(&options, PAM_OPT_TRY_FIRST_PASS, NULL)))
{
encrypted = crypt(oldPassword, oldHash);
if (oldPassword[0] == '\0' && oldHash != '\0')
encrypted = ":";
status = strcmp(encrypted, oldHash) == 0 ? PAM_SUCCESS : PAM_AUTH_ERR;
if (status != PAM_SUCCESS)
{
if (pam_test_option(&options, PAM_OPT_USE_FIRST_PASS, NULL))
sendConversationMessage(appconv, "NetInfo password incorrect", PAM_ERROR_MSG, &options);
else
sendConversationMessage(appconv, "NetInfo password incorrect: try again", PAM_ERROR_MSG, &options);
}
else
{
ni_free(d);
return PAM_SUCCESS;
}
}
tries = 0;
while (oldPassword == NULL && tries++ < maxTries)
{
pmsg = &msg;
msg.msg_style = PAM_PROMPT_ECHO_OFF;
msg.msg = OLD_PASSWORD_PROMPT;
resp = NULL;
status = appconv->conv(1, (struct pam_message **) & pmsg, &resp, appconv->appdata_ptr);
if (status != PAM_SUCCESS)
{
ni_free(d);
return status;
}
oldPassword = resp->resp;
free(resp);
encrypted = crypt(oldPassword, oldHash);
if (oldPassword[0] == '\0' && oldHash != '\0')
encrypted = ":";
status = strcmp(encrypted, oldHash) == 0 ? PAM_SUCCESS : PAM_AUTH_ERR;
if (status != PAM_SUCCESS)
{
int abortMe = 0;
if (oldPassword != NULL && oldPassword[0] == '\0')
abortMe = 1;
_pam_overwrite(oldPassword);
_pam_drop(oldPassword);
if (!amChangingExpiredPassword & abortMe)
{
sendConversationMessage(appconv, "Password change aborted", PAM_ERROR_MSG, &options);
ni_free(d);
return PAM_AUTHTOK_RECOVER_ERR;
}
else
{
sendConversationMessage(appconv, "NetInfo password incorrect: try again", PAM_ERROR_MSG, &options);
}
}
}
if (oldPassword == NULL)
{
status = PAM_MAXTRIES;
}
(void) pam_set_item(pamh, PAM_OLDAUTHTOK, oldPassword);
ni_free(d);
return status;
} /* PAM_PRELIM_CHECK */
status = PAM_ABORT;
tries = 0;
while (newPassword == NULL && tries++ < maxTries)
{
pmsg = &msg;
msg.msg_style = PAM_PROMPT_ECHO_OFF;
msg.msg = NEW_PASSWORD_PROMPT;
resp = NULL;
status = appconv->conv(1, &pmsg, &resp, appconv->appdata_ptr);
if (status != PAM_SUCCESS)
{
ni_free(d);
return status;
}
newPassword = resp->resp;
free(resp);
if (newPassword[0] == '\0')
{
free(newPassword);
newPassword = NULL;
}
if (newPassword != NULL)
{
if (isroot == 0)
{
if (oldPassword != NULL && !strcmp(oldPassword, newPassword))
{
cmiscptr = "Passwords must differ";
newPassword = NULL;
}
else if (strlen(newPassword) < minlen)
{
cmiscptr = "Password too short";
newPassword = NULL;
}
}
} else
{
ni_free(d);
return PAM_AUTHTOK_RECOVER_ERR;
}
if (cmiscptr == NULL)
{
/* get password again */
char *miscptr;
pmsg = &msg;
msg.msg_style = PAM_PROMPT_ECHO_OFF;
msg.msg = AGAIN_PASSWORD_PROMPT;
resp = NULL;
status = appconv->conv(1, &pmsg, &resp, appconv->appdata_ptr);
if (status != PAM_SUCCESS)
{
ni_free(d);
return status;
}
miscptr = resp->resp;
free(resp);
if (miscptr[0] == '\0')
{
free(miscptr);
miscptr = NULL;
}
if (miscptr == NULL)
{
if (!amChangingExpiredPassword)
{
sendConversationMessage(appconv, "Password change aborted",
PAM_ERROR_MSG, &options);
ni_free(d);
return PAM_AUTHTOK_RECOVER_ERR;
}
}
else if (!strcmp(newPassword, miscptr))
{
miscptr = NULL;
break;
}
sendConversationMessage(appconv, "You must enter the same password",
PAM_ERROR_MSG, &options);
miscptr = NULL;
newPassword = NULL;
}
else
{
sendConversationMessage(appconv, cmiscptr, PAM_ERROR_MSG, &options);
cmiscptr = NULL;
newPassword = NULL;
}
}
if (cmiscptr != NULL || newPassword == NULL)
{
ni_free(d);
return PAM_MAXTRIES;
}
/*
* Lock onto the master server.
*/
ni_needwrite(d, 1);
/*
* Authenticate if necessary
*/
if (isroot == 0)
{
ni_setuser(d, uname);
ni_setpassword(d, oldPassword);
}
/*
* Create a random salt
*/
srandom((int) time((time_t *) NULL));
salt[0] = saltchars[random() % strlen(saltchars)];
salt[1] = saltchars[random() % strlen(saltchars)];
salt[2] = '\0';
newHash = crypt(newPassword, salt);
/*
* Change the password in NetInfo.
*/
status = ni_read(d, &dir, &pl);
if (status != NI_OK)
{
ni_free(d);
syslog(LOG_ERR, "NetInfo read failed: %s", ni_error(status));
return netinfo2PamStatus(status);
}
p.nip_name = "passwd";
p.nip_val.ni_namelist_len = 1;
p.nip_val.ni_namelist_val = (ni_name *) malloc(sizeof(ni_name));
p.nip_val.ni_namelist_val[0] = newHash;
where = ni_proplist_match(pl, p.nip_name, NULL);
if (where == NI_INDEX_NULL)
status = ni_createprop(d, &dir, p, NI_INDEX_NULL);
else
status = ni_writeprop(d, &dir, where, p.nip_val);
if (status != NI_OK)
{
ni_free(d);
syslog(LOG_ERR, "NetInfo write property \"passwd\" failed: %s", ni_error(status));
return netinfo2PamStatus(status);
}
/*
* Now, update "change" property. If this fails, we've still
* updated the password... perhaps the user should be alerted
* of this.
*/
lifetime = password_lifetime();
if (lifetime > 0)
{
struct timeval tp;
char change[64];
where = ni_proplist_match(pl, "change", NULL);
gettimeofday(&tp, NULL);
tp.tv_sec += lifetime;
snprintf(change, sizeof(change), "%ld", tp.tv_sec);
p.nip_name = "change";
p.nip_val.ni_namelist_len = 1;
p.nip_val.ni_namelist_val[0] = change;
if (where == NI_INDEX_NULL)
status = ni_createprop(d, &dir, p, NI_INDEX_NULL);
else
status = ni_writeprop(d, &dir, where, p.nip_val);
if (status != NI_OK)
{
ni_free(d);
syslog(LOG_ERR, "NetInfo write property \"change\" failed: %s", ni_error(status));
return netinfo2PamStatus(status);
}
}
free(p.nip_val.ni_namelist_val);
ni_free(d);
/* tell lookupd to invalidate its cache */
{
int i, proc = -1;
unit lookup_buf[MAX_INLINE_UNITS];
#ifdef __NeXT__
port_t port;
#else
mach_port_t port;
#endif
port = _lookupd_port(0);
(void) _lookup_link(port, "_invalidatecache", &proc);
(void) _lookup_one(port, proc, NULL, 0, lookup_buf, &i);
}
return PAM_SUCCESS;
}
int
do_open(char *tool, char *name, void **domain, bool bytag, int timeout, char *user, char *passwd)
{
/* do an ni_open or an ni_connect, as appropriate */
char *tag;
enum ni_parse_status pstatus;
ni_status status;
struct sockaddr_in server;
ni_id rootdir;
if (bytag) {
/* connect by tag */
/* call a function to parse the input arg */
pstatus = ni_parse_server_tag(name, &server, &tag);
if (pstatus != NI_PARSE_OK)
{
qtss_fprintf(stderr, "%s: incorrect format for domain %s (%s)\n",
tool, name, ni_parse_error_string(pstatus));
qtss_fprintf(stderr, "usage: -t <host>/<tag>\n");
qtss_fprintf(stderr, "<host> can be a host name or IP address\n");
return NI_FAILED + 1 + pstatus;
}
/* connect to the specified server */
*domain = ni_connect(&server, tag);
if (*domain == NULL) {
qtss_fprintf(stderr, "%s: can't connect to server %s\n", tool, name);
free(tag);
return NI_FAILED + 1;
}
}
else {
/* open domain */
status = ni_open(NULL, name, domain);
if (status != NI_OK) {
qtss_fprintf(stderr, "%s: can't connect to server for domain %s\n",
tool, name);
return status;
}
}
/* abort on errors */
ni_setabort(*domain, 1);
/* set timeouts */
ni_setreadtimeout(*domain, timeout);
ni_setwritetimeout(*domain, timeout);
/* authentication */
if (user != NULL) {
ni_setuser(*domain, user);
if (passwd != NULL) ni_setpassword(*domain, passwd);
}
/* get the root directory to see if the connection is alive */
status = ni_root(*domain, &rootdir);
if (status != NI_OK) {
if (bytag)
qtss_fprintf(stderr, "%s: can't connect to server %s: %s\n",
tool, name, ni_error(status));
else
qtss_fprintf(stderr, "%s: can't connect to server for domain %s: %s\n",
tool, name, ni_error(status));
return status;
}
return 0;
}