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pam_sss.c
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pam_sss.c
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/*
Authors:
Sumit Bose <sbose@redhat.com>
Copyright (C) 2009 Red Hat
Copyright (C) 2010, rhafer@suse.de, Novell Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <syslog.h>
#include <time.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <locale.h>
#include <stdbool.h>
#include <ctype.h>
#include <security/pam_modules.h>
#include <security/pam_appl.h>
#ifdef HAVE_GDM_PAM_EXTENSIONS
#include <gdm/gdm-pam-extensions.h>
#endif
#include "sss_pam_compat.h"
#include "sss_pam_macros.h"
#include "sss_cli.h"
#include "pam_message.h"
#include "util/atomic_io.h"
#include "util/authtok-utils.h"
#include "util/dlinklist.h"
#include <libintl.h>
#define _(STRING) dgettext (PACKAGE, STRING)
#define _n(SINGULAR, PLURAL, VALUE) dngettext(PACKAGE, SINGULAR, PLURAL, VALUE)
#define PWEXP_FLAG "pam_sss:password_expired_flag"
#define FD_DESTRUCTOR "pam_sss:fd_destructor"
#define PAM_SSS_AUTHOK_TYPE "pam_sss:authtok_type"
#define PAM_SSS_AUTHOK_SIZE "pam_sss:authtok_size"
#define PAM_SSS_AUTHOK_DATA "pam_sss:authtok_data"
#define PW_RESET_MSG_FILENAME_TEMPLATE SSSD_CONF_DIR"/customize/%s/pam_sss_pw_reset_message.%s"
#define PW_RESET_MSG_MAX_SIZE 4096
#define OPT_RETRY_KEY "retry="
#define OPT_DOMAINS_KEY "domains="
#define EXP_ACC_MSG _("Permission denied. ")
#define SRV_MSG _("Server message: ")
#define PASSKEY_LOCAL_AUTH_MSG _("Kerberos TGT will not be granted upon login, user experience will be affected.")
#define PASSKEY_DEFAULT_PIN_MSG _("Enter PIN:")
#define DEBUG_MGS_LEN 1024
#define MAX_AUTHTOK_SIZE (1024*1024)
#define CHECK_AND_RETURN_PI_STRING(s) ((s != NULL && *s != '\0')? s : "(not available)")
#define SERVICE_IS_GDM_SMARTCARD(pitem) (strcmp((pitem)->pam_service, \
"gdm-smartcard") == 0)
static void logger(pam_handle_t *pamh, int level, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
#ifdef DEBUG
va_list apd;
char debug_msg[DEBUG_MGS_LEN];
int ret;
va_copy(apd, ap);
ret = vsnprintf(debug_msg, DEBUG_MGS_LEN, fmt, apd);
if (ret >= DEBUG_MGS_LEN) {
D(("the following message is truncated: %s", debug_msg));
} else if (ret < 0) {
D(("vsnprintf failed to format debug message!"));
} else {
D((debug_msg));
}
va_end(apd);
#endif
pam_vsyslog(pamh, LOG_AUTHPRIV|level, fmt, ap);
va_end(ap);
}
static void free_exp_data(pam_handle_t *pamh, void *ptr, int err)
{
free(ptr);
}
static void close_fd(pam_handle_t *pamh, void *ptr, int err)
{
#ifdef PAM_DATA_REPLACE
if (err & PAM_DATA_REPLACE) {
/* Nothing to do */
return;
}
#endif /* PAM_DATA_REPLACE */
D(("Closing the fd"));
sss_pam_lock();
sss_cli_close_socket();
sss_pam_unlock();
}
struct cert_auth_info {
char *cert_user;
char *cert;
char *token_name;
char *module_name;
char *key_id;
char *label;
char *prompt_str;
char *pam_cert_user;
char *choice_list_id;
struct cert_auth_info *prev;
struct cert_auth_info *next;
};
static void free_cai(struct cert_auth_info *cai)
{
if (cai != NULL) {
free(cai->cert_user);
free(cai->cert);
free(cai->token_name);
free(cai->module_name);
free(cai->key_id);
free(cai->label);
free(cai->prompt_str);
free(cai->choice_list_id);
free(cai);
}
}
static void free_cert_list(struct cert_auth_info *list)
{
struct cert_auth_info *cai;
struct cert_auth_info *cai_next;
if (list != NULL) {
DLIST_FOR_EACH_SAFE(cai, cai_next, list) {
DLIST_REMOVE(list, cai);
free_cai(cai);
}
}
}
static void overwrite_and_free_authtoks(struct pam_items *pi)
{
if (pi->pam_authtok != NULL) {
_pam_overwrite_n((void *)pi->pam_authtok, pi->pam_authtok_size);
free((void *)pi->pam_authtok);
pi->pam_authtok = NULL;
}
if (pi->pam_newauthtok != NULL) {
_pam_overwrite_n((void *)pi->pam_newauthtok, pi->pam_newauthtok_size);
free((void *)pi->pam_newauthtok);
pi->pam_newauthtok = NULL;
}
if (pi->first_factor != NULL) {
_pam_overwrite_n((void *)pi->first_factor, strlen(pi->first_factor));
free((void *)pi->first_factor);
pi->first_factor = NULL;
}
pi->pamstack_authtok = NULL;
pi->pamstack_oldauthtok = NULL;
}
static void overwrite_and_free_pam_items(struct pam_items *pi)
{
overwrite_and_free_authtoks(pi);
free(pi->domain_name);
pi->domain_name = NULL;
free(pi->otp_vendor);
pi->otp_vendor = NULL;
free(pi->otp_token_id);
pi->otp_token_id = NULL;
free(pi->otp_challenge);
pi->otp_challenge = NULL;
free(pi->passkey_key);
pi->passkey_key = NULL;
free(pi->passkey_prompt_pin);
pi->passkey_prompt_pin = NULL;
free_cert_list(pi->cert_list);
pi->cert_list = NULL;
pi->selected_cert = NULL;
pc_list_free(pi->pc);
pi->pc = NULL;
}
static int null_strcmp(const char *s1, const char *s2) {
if (s1 == NULL && s2 == NULL) return 0;
if (s1 == NULL && s2 != NULL) return -1;
if (s1 != NULL && s2 == NULL) return 1;
return strcmp(s1, s2);
}
enum {
SSS_PAM_CONV_DONE = 0,
SSS_PAM_CONV_STD,
SSS_PAM_CONV_REENTER,
};
static int do_pam_conversation(pam_handle_t *pamh, const int msg_style,
const char *msg,
const char *reenter_msg,
char **_answer)
{
int ret;
int state = SSS_PAM_CONV_STD;
const struct pam_conv *conv;
const struct pam_message *mesg[1];
struct pam_message *pam_msg;
struct pam_response *resp=NULL;
char *answer = NULL;
if ((msg_style == PAM_TEXT_INFO || msg_style == PAM_ERROR_MSG) &&
msg == NULL) return PAM_SYSTEM_ERR;
if ((msg_style == PAM_PROMPT_ECHO_OFF ||
msg_style == PAM_PROMPT_ECHO_ON) &&
(msg == NULL || _answer == NULL)) return PAM_SYSTEM_ERR;
if (msg_style == PAM_TEXT_INFO || msg_style == PAM_ERROR_MSG) {
logger(pamh, LOG_INFO, "User %s message: %s",
msg_style == PAM_TEXT_INFO ? "info" : "error",
msg);
}
ret=pam_get_item(pamh, PAM_CONV, (const void **) &conv);
if (ret != PAM_SUCCESS) return ret;
if (conv == NULL || conv->conv == NULL) {
logger(pamh, LOG_ERR, "No conversation function");
return PAM_SYSTEM_ERR;
}
do {
pam_msg = malloc(sizeof(struct pam_message));
if (pam_msg == NULL) {
D(("Malloc failed."));
ret = PAM_SYSTEM_ERR;
goto failed;
}
pam_msg->msg_style = msg_style;
if (state == SSS_PAM_CONV_REENTER) {
pam_msg->msg = reenter_msg;
} else {
pam_msg->msg = msg;
}
mesg[0] = (const struct pam_message *) pam_msg;
ret=conv->conv(1, mesg, &resp,
conv->appdata_ptr);
free(pam_msg);
if (ret != PAM_SUCCESS) {
D(("Conversation failure: %s.", pam_strerror(pamh,ret)));
goto failed;
}
if (msg_style == PAM_PROMPT_ECHO_OFF ||
msg_style == PAM_PROMPT_ECHO_ON) {
if (resp == NULL) {
D(("response expected, but resp==NULL"));
ret = PAM_SYSTEM_ERR;
goto failed;
}
if (state == SSS_PAM_CONV_REENTER) {
if (null_strcmp(answer, resp[0].resp) != 0) {
logger(pamh, LOG_NOTICE, "Passwords do not match.");
_pam_overwrite((void *)resp[0].resp);
free(resp[0].resp);
if (answer != NULL) {
_pam_overwrite((void *) answer);
free(answer);
answer = NULL;
}
ret = do_pam_conversation(pamh, PAM_ERROR_MSG,
_("Passwords do not match"),
NULL, NULL);
if (ret != PAM_SUCCESS) {
D(("do_pam_conversation failed."));
ret = PAM_SYSTEM_ERR;
goto failed;
}
ret = PAM_CRED_ERR;
goto failed;
}
_pam_overwrite((void *)resp[0].resp);
free(resp[0].resp);
} else {
if (resp[0].resp == NULL) {
D(("Empty password"));
answer = NULL;
} else {
answer = strndup(resp[0].resp, MAX_AUTHTOK_SIZE);
_pam_overwrite((void *)resp[0].resp);
free(resp[0].resp);
if(answer == NULL) {
D(("strndup failed"));
ret = PAM_BUF_ERR;
goto failed;
}
}
}
free(resp);
resp = NULL;
}
if (reenter_msg != NULL && state == SSS_PAM_CONV_STD) {
state = SSS_PAM_CONV_REENTER;
} else {
state = SSS_PAM_CONV_DONE;
}
} while (state != SSS_PAM_CONV_DONE);
if (_answer) *_answer = answer;
return PAM_SUCCESS;
failed:
free(answer);
return ret;
}
static errno_t display_pw_reset_message(pam_handle_t *pamh,
const char *domain_name,
const char *suffix)
{
int ret;
struct stat stat_buf;
char *msg_buf = NULL;
int fd = -1;
size_t size;
size_t total_len;
char *filename = NULL;
if (strchr(suffix, '/') != NULL || strchr(domain_name, '/') != NULL) {
D(("Suffix [%s] or domain name [%s] contain illegal character.", suffix,
domain_name));
return EINVAL;
}
size = sizeof(PW_RESET_MSG_FILENAME_TEMPLATE) + strlen(domain_name) +
strlen(suffix);
filename = malloc(size);
if (filename == NULL) {
D(("malloc failed."));
ret = ENOMEM;
goto done;
}
ret = snprintf(filename, size, PW_RESET_MSG_FILENAME_TEMPLATE, domain_name,
suffix);
if (ret < 0 || ret >= size) {
D(("snprintf failed."));
ret = EFAULT;
goto done;
}
fd = open(filename, O_RDONLY);
if (fd == -1) {
ret = errno;
D(("open failed [%d][%s].\n", ret, strerror(ret)));
goto done;
}
ret = fstat(fd, &stat_buf);
if (ret == -1) {
ret = errno;
D(("fstat failed [%d][%s].", ret, strerror(ret)));
goto done;
}
if (!S_ISREG(stat_buf.st_mode)) {
logger(pamh, LOG_ERR,
"Password reset message file is not a regular file.");
ret = EINVAL;
goto done;
}
if (stat_buf.st_uid != 0 || stat_buf.st_gid != 0 ||
(stat_buf.st_mode & ~S_IFMT) != 0644) {
logger(pamh, LOG_ERR,"Permission error, "
"file [%s] must be owned by root with permissions 0644.",
filename);
ret = EPERM;
goto done;
}
if (stat_buf.st_size > PW_RESET_MSG_MAX_SIZE) {
logger(pamh, LOG_ERR, "Password reset message file is too large.");
ret = EFBIG;
goto done;
}
msg_buf = malloc(stat_buf.st_size + 1);
if (msg_buf == NULL) {
D(("malloc failed."));
ret = ENOMEM;
goto done;
}
errno = 0;
total_len = sss_atomic_read_s(fd, msg_buf, stat_buf.st_size);
if (total_len == -1) {
ret = errno;
D(("read failed [%d][%s].", ret, strerror(ret)));
goto done;
}
ret = close(fd);
fd = -1;
if (ret == -1) {
ret = errno;
D(("close failed [%d][%s].", ret, strerror(ret)));
}
if (total_len != stat_buf.st_size) {
D(("read fewer bytes [%d] than expected [%d].", total_len,
stat_buf.st_size));
ret = EIO;
goto done;
}
msg_buf[stat_buf.st_size] = '\0';
ret = do_pam_conversation(pamh, PAM_TEXT_INFO, msg_buf, NULL, NULL);
if (ret != PAM_SUCCESS) {
D(("do_pam_conversation failed."));
}
done:
if (fd != -1) {
close(fd);
}
free(msg_buf);
free(filename);
return ret;
}
static errno_t select_pw_reset_message(pam_handle_t *pamh, struct pam_items *pi)
{
int ret;
char *locale;
const char *domain_name;
domain_name = pi->domain_name;
if (domain_name == NULL || *domain_name == '\0') {
D(("Domain name is unknown."));
return EINVAL;
}
locale = setlocale(LC_MESSAGES, NULL);
ret = -1;
if (locale != NULL) {
ret = display_pw_reset_message(pamh, domain_name, locale);
}
if (ret != 0) {
ret = display_pw_reset_message(pamh, domain_name, "txt");
}
if (ret != 0) {
ret = do_pam_conversation(pamh, PAM_TEXT_INFO,
_("Password reset by root is not supported."),
NULL, NULL);
if (ret != PAM_SUCCESS) {
D(("do_pam_conversation failed."));
}
}
return ret;
}
static int user_info_offline_auth(pam_handle_t *pamh, size_t buflen,
uint8_t *buf)
{
int ret;
int64_t expire_date;
struct tm tm;
char expire_str[128];
char user_msg[256];
expire_str[0] = '\0';
if (buflen != sizeof(uint32_t) + sizeof(int64_t)) {
D(("User info response data has the wrong size"));
return PAM_BUF_ERR;
}
memcpy(&expire_date, buf + sizeof(uint32_t), sizeof(int64_t));
if (expire_date > 0) {
if (localtime_r((time_t *) &expire_date, &tm) != NULL) {
ret = strftime(expire_str, sizeof(expire_str), "%c", &tm);
if (ret == 0) {
D(("strftime failed."));
expire_str[0] = '\0';
}
} else {
D(("localtime_r failed"));
}
}
ret = snprintf(user_msg, sizeof(user_msg), "%s%s%s.",
_("Authenticated with cached credentials"),
expire_str[0] ? _(", your cached password will expire at: ") : "",
expire_str[0] ? expire_str : "");
if (ret < 0 || ret >= sizeof(user_msg)) {
D(("snprintf failed."));
return PAM_SYSTEM_ERR;
}
ret = do_pam_conversation(pamh, PAM_TEXT_INFO, user_msg, NULL, NULL);
if (ret != PAM_SUCCESS) {
D(("do_pam_conversation failed."));
return PAM_SYSTEM_ERR;
}
return PAM_SUCCESS;
}
static int user_info_grace_login(pam_handle_t *pamh,
size_t buflen,
uint8_t *buf)
{
int ret;
uint32_t grace;
char user_msg[256];
if (buflen != 2* sizeof(uint32_t)) {
D(("User info response data has the wrong size"));
return PAM_BUF_ERR;
}
memcpy(&grace, buf + sizeof(uint32_t), sizeof(uint32_t));
ret = snprintf(user_msg, sizeof(user_msg),
_("Your password has expired. "
"You have %1$d grace login(s) remaining."),
grace);
if (ret < 0 || ret >= sizeof(user_msg)) {
D(("snprintf failed."));
return PAM_SYSTEM_ERR;
}
ret = do_pam_conversation(pamh, PAM_TEXT_INFO, user_msg, NULL, NULL);
if (ret != PAM_SUCCESS) {
D(("do_pam_conversation failed."));
return PAM_SYSTEM_ERR;
}
return PAM_SUCCESS;
}
#define MINSEC 60
#define HOURSEC (60*MINSEC)
#define DAYSEC (24*HOURSEC)
static int user_info_expire_warn(pam_handle_t *pamh,
size_t buflen,
uint8_t *buf)
{
int ret;
uint32_t expire;
char user_msg[256];
const char* unit;
if (buflen != 2* sizeof(uint32_t)) {
D(("User info response data has the wrong size"));
return PAM_BUF_ERR;
}
memcpy(&expire, buf + sizeof(uint32_t), sizeof(uint32_t));
/* expire == 0 indicates the password expired */
if (expire != 0) {
if (expire >= DAYSEC) {
expire /= DAYSEC;
unit = _n("day", "days", expire);
} else if (expire >= HOURSEC) {
expire /= HOURSEC;
unit = _n("hour", "hours", expire);
} else if (expire >= MINSEC) {
expire /= MINSEC;
unit = _n("minute", "minutes", expire);
} else {
unit = _n("second", "seconds", expire);
}
ret = snprintf(user_msg, sizeof(user_msg),
_("Your password will expire in %1$d %2$s."), expire, unit);
} else {
ret = snprintf(user_msg, sizeof(user_msg),
_("Your password has expired."));
}
if (ret < 0 || ret >= sizeof(user_msg)) {
D(("snprintf failed."));
return PAM_SYSTEM_ERR;
}
ret = do_pam_conversation(pamh, PAM_TEXT_INFO, user_msg, NULL, NULL);
if (ret != PAM_SUCCESS) {
D(("do_pam_conversation failed."));
return PAM_SYSTEM_ERR;
}
return PAM_SUCCESS;
}
static int user_info_offline_auth_delayed(pam_handle_t *pamh, size_t buflen,
uint8_t *buf)
{
int ret;
int64_t delayed_until;
struct tm tm;
char delay_str[128];
char user_msg[256];
delay_str[0] = '\0';
if (buflen != sizeof(uint32_t) + sizeof(int64_t)) {
D(("User info response data has the wrong size"));
return PAM_BUF_ERR;
}
memcpy(&delayed_until, buf + sizeof(uint32_t), sizeof(int64_t));
if (delayed_until <= 0) {
D(("User info response data has an invalid value"));
return PAM_BUF_ERR;
}
if (localtime_r((time_t *) &delayed_until, &tm) != NULL) {
ret = strftime(delay_str, sizeof(delay_str), "%c", &tm);
if (ret == 0) {
D(("strftime failed."));
delay_str[0] = '\0';
}
} else {
D(("localtime_r failed"));
}
ret = snprintf(user_msg, sizeof(user_msg), "%s%s.",
_("Authentication is denied until: "),
delay_str);
if (ret < 0 || ret >= sizeof(user_msg)) {
D(("snprintf failed."));
return PAM_SYSTEM_ERR;
}
ret = do_pam_conversation(pamh, PAM_TEXT_INFO, user_msg, NULL, NULL);
if (ret != PAM_SUCCESS) {
D(("do_pam_conversation failed."));
return PAM_SYSTEM_ERR;
}
return PAM_SUCCESS;
}
static int user_info_offline_chpass(pam_handle_t *pamh)
{
int ret;
ret = do_pam_conversation(pamh, PAM_TEXT_INFO,
_("System is offline, password change not possible"),
NULL, NULL);
if (ret != PAM_SUCCESS) {
D(("do_pam_conversation failed."));
return PAM_SYSTEM_ERR;
}
return PAM_SUCCESS;
}
static int user_info_otp_chpass(pam_handle_t *pamh)
{
int ret;
ret = do_pam_conversation(pamh, PAM_TEXT_INFO,
_("After changing the OTP password, you need to "
"log out and back in order to acquire a ticket"),
NULL, NULL);
if (ret != PAM_SUCCESS) {
D(("do_pam_conversation failed."));
return PAM_SYSTEM_ERR;
}
return PAM_SUCCESS;
}
static int user_info_pin_locked(pam_handle_t *pamh)
{
int ret;
ret = do_pam_conversation(pamh, PAM_TEXT_INFO, _("PIN locked"),
NULL, NULL);
if (ret != PAM_SUCCESS) {
D(("do_pam_conversation failed."));
return PAM_SYSTEM_ERR;
}
return PAM_SUCCESS;
}
static int user_info_no_krb_tgt(pam_handle_t *pamh)
{
int ret;
ret = do_pam_conversation(pamh, PAM_TEXT_INFO,
_("No Kerberos TGT granted as "
"the server does not support this method. "
"Your single-sign on(SSO) experience will "
"be affected."),
NULL, NULL);
if (ret != PAM_SUCCESS) {
D(("do_pam_conversation failed."));
return PAM_SYSTEM_ERR;
}
return PAM_SUCCESS;
}
static int user_info_account_expired(pam_handle_t *pamh, size_t buflen,
uint8_t *buf)
{
int ret;
uint32_t msg_len;
char *user_msg;
size_t bufsize = 0;
/* resp_type and length of message are expected to be in buf */
if (buflen < 2* sizeof(uint32_t)) {
D(("User info response data is too short"));
return PAM_BUF_ERR;
}
/* msg_len = legth of message */
memcpy(&msg_len, buf + sizeof(uint32_t), sizeof(uint32_t));
if (buflen != 2* sizeof(uint32_t) + msg_len) {
D(("User info response data has the wrong size"));
return PAM_BUF_ERR;
}
bufsize = strlen(EXP_ACC_MSG) + 1;
if (msg_len > 0) {
bufsize += strlen(SRV_MSG) + msg_len;
}
user_msg = (char *)malloc(sizeof(char) * bufsize);
if (!user_msg) {
D(("Out of memory."));
return PAM_SYSTEM_ERR;
}
ret = snprintf(user_msg, bufsize, "%s%s%.*s",
EXP_ACC_MSG,
msg_len > 0 ? SRV_MSG : "",
(int)msg_len,
msg_len > 0 ? (char *)(buf + 2 * sizeof(uint32_t)) : "" );
if (ret < 0 || ret > bufsize) {
D(("snprintf failed."));
free(user_msg);
return PAM_SYSTEM_ERR;
}
ret = do_pam_conversation(pamh, PAM_TEXT_INFO, user_msg, NULL, NULL);
free(user_msg);
if (ret != PAM_SUCCESS) {
D(("do_pam_conversation failed."));
return PAM_SYSTEM_ERR;
}
return PAM_SUCCESS;
}
static int user_info_chpass_error(pam_handle_t *pamh, size_t buflen,
uint8_t *buf)
{
int ret;
uint32_t msg_len;
char *user_msg;
size_t bufsize = 0;
if (buflen < 2* sizeof(uint32_t)) {
D(("User info response data is too short"));
return PAM_BUF_ERR;
}
memcpy(&msg_len, buf + sizeof(uint32_t), sizeof(uint32_t));
if (buflen != 2* sizeof(uint32_t) + msg_len) {
D(("User info response data has the wrong size"));
return PAM_BUF_ERR;
}
bufsize = strlen(_("Password change failed. ")) + 1;
if (msg_len > 0) {
bufsize += strlen(_("Server message: ")) + msg_len;
}
user_msg = (char *)malloc(sizeof(char) * bufsize);
if (!user_msg) {
D(("Out of memory."));
return PAM_SYSTEM_ERR;
}
ret = snprintf(user_msg, bufsize, "%s%s%.*s",
_("Password change failed. "),
msg_len > 0 ? _("Server message: ") : "",
(int)msg_len,
msg_len > 0 ? (char *)(buf + 2 * sizeof(uint32_t)) : "" );
if (ret < 0 || ret > bufsize) {
D(("snprintf failed."));
free(user_msg);
return PAM_SYSTEM_ERR;
}
ret = do_pam_conversation(pamh, PAM_TEXT_INFO, user_msg, NULL, NULL);
free(user_msg);
if (ret != PAM_SUCCESS) {
D(("do_pam_conversation failed."));
return PAM_SYSTEM_ERR;
}
return PAM_SUCCESS;
}
static int eval_user_info_response(pam_handle_t *pamh, size_t buflen,
uint8_t *buf)
{
int ret;
uint32_t type;
if (buflen < sizeof(uint32_t)) {
D(("User info response data is too short"));
return PAM_BUF_ERR;
}
memcpy(&type, buf, sizeof(uint32_t));
switch(type) {
case SSS_PAM_USER_INFO_OFFLINE_AUTH:
ret = user_info_offline_auth(pamh, buflen, buf);
break;
case SSS_PAM_USER_INFO_GRACE_LOGIN:
ret = user_info_grace_login(pamh, buflen, buf);
break;
case SSS_PAM_USER_INFO_EXPIRE_WARN:
ret = user_info_expire_warn(pamh, buflen, buf);
break;
case SSS_PAM_USER_INFO_OFFLINE_AUTH_DELAYED:
ret = user_info_offline_auth_delayed(pamh, buflen, buf);
break;
case SSS_PAM_USER_INFO_OFFLINE_CHPASS:
ret = user_info_offline_chpass(pamh);
break;
case SSS_PAM_USER_INFO_OTP_CHPASS:
ret = user_info_otp_chpass(pamh);
break;
case SSS_PAM_USER_INFO_CHPASS_ERROR:
ret = user_info_chpass_error(pamh, buflen, buf);
break;
case SSS_PAM_USER_INFO_PIN_LOCKED:
ret = user_info_pin_locked(pamh);
break;
case SSS_PAM_USER_INFO_ACCOUNT_EXPIRED:
ret = user_info_account_expired(pamh, buflen, buf);
break;
case SSS_PAM_USER_INFO_NO_KRB_TGT:
ret = user_info_no_krb_tgt(pamh);
break;
default:
D(("Unknown user info type [%d]", type));
ret = PAM_SYSTEM_ERR;
}
return ret;
}
static int parse_cert_info(struct pam_items *pi, uint8_t *buf, size_t len,
size_t *p, const char **cert_user,
const char **pam_cert_user)
{
struct cert_auth_info *cai = NULL;
size_t offset;
int ret;
if (buf[*p + (len - 1)] != '\0') {
D(("cert info does not end with \\0."));
return EINVAL;
}
cai = calloc(1, sizeof(struct cert_auth_info));
if (cai == NULL) {
return ENOMEM;
}
cai->cert_user = strdup((char *) &buf[*p]);
if (cai->cert_user == NULL) {
D(("strdup failed"));
ret = ENOMEM;
goto done;
}
if (cert_user != NULL) {
*cert_user = cai->cert_user;
}
offset = strlen(cai->cert_user) + 1;
if (offset >= len) {
D(("Cert message size mismatch"));
ret = EINVAL;
goto done;
}
cai->token_name = strdup((char *) &buf[*p + offset]);
if (cai->token_name == NULL) {
D(("strdup failed"));
ret = ENOMEM;
goto done;
}
offset += strlen(cai->token_name) + 1;
if (offset >= len) {
D(("Cert message size mismatch"));
ret = EINVAL;
goto done;
}
cai->module_name = strdup((char *) &buf[*p + offset]);
if (cai->module_name == NULL) {
D(("strdup failed"));
ret = ENOMEM;
goto done;
}
offset += strlen(cai->module_name) + 1;
if (offset >= len) {
D(("Cert message size mismatch"));
ret = EINVAL;
goto done;
}
cai->key_id = strdup((char *) &buf[*p + offset]);
if (cai->key_id == NULL) {
D(("strdup failed"));
ret = ENOMEM;
goto done;
}
offset += strlen(cai->key_id) + 1;
if (offset >= len) {
D(("Cert message size mismatch"));
ret = EINVAL;
goto done;
}
cai->label = strdup((char *) &buf[*p + offset]);
if (cai->label == NULL) {