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authorSumit Bose <sbose@redhat.com>2009-03-02 22:50:15 +0100
committerSimo Sorce <ssorce@redhat.com>2009-03-03 17:45:34 -0500
commita4354d555eac83f628799464ae8157c0364cb8a8 (patch)
treee8870123bf14ba06693723aae9e2e95a85ee4302 /server/responder
parent71eacad35be73dc30d56d3cffa9785a533d25fc8 (diff)
downloadsssd-a4354d555eac83f628799464ae8157c0364cb8a8.tar.gz
sssd-a4354d555eac83f628799464ae8157c0364cb8a8.tar.bz2
sssd-a4354d555eac83f628799464ae8157c0364cb8a8.zip
replaced pure ldb calls with sysdb calls
Diffstat (limited to 'server/responder')
-rw-r--r--server/responder/pam/pam_LOCAL_domain.c423
-rw-r--r--server/responder/pam/pam_LOCAL_domain.h4
-rw-r--r--server/responder/pam/pamsrv_cmd.c2
3 files changed, 309 insertions, 120 deletions
diff --git a/server/responder/pam/pam_LOCAL_domain.c b/server/responder/pam/pam_LOCAL_domain.c
index 54b68307..8ebe1732 100644
--- a/server/responder/pam/pam_LOCAL_domain.c
+++ b/server/responder/pam/pam_LOCAL_domain.c
@@ -1,4 +1,6 @@
+#include <time.h>
#include <security/pam_modules.h>
+#include <ldb.h>
#include "util/util.h"
#include "responder/pam/pamsrv.h"
@@ -27,7 +29,13 @@ struct LOCAL_request {
struct cli_ctx *cctx;
struct pam_data *pd;
pam_dp_callback_t callback;
-
+ struct sysdb_ctx *dbctx;
+ struct sss_domain_info *domain_info;
+ struct sysdb_attrs *mod_attrs;
+ struct sysdb_req *sysdb_req;
+ struct ldb_result *res;
+ int global_pam_status;
+ int callback_delay;
};
struct callback_ctx {
@@ -75,56 +83,270 @@ static void LOCAL_call_callback(struct tevent_context *ev,
callback(cctx, pam_status, domain);
}
-static void LOCAL_pam_handler(struct tevent_context *ev,
- struct tevent_timer *te,
- struct timeval tv, void *pvt)
+static void prepare_reply(struct LOCAL_request *lreq, const int pam_status)
+{
+ int ret;
+ struct callback_ctx *callback_ctx;
+ struct timeval tv;
+ struct tevent_timer *te;
+
+ tv.tv_sec = 0;
+ tv.tv_usec = 0;
+
+ if (lreq->callback_delay > 0) {
+ ret = gettimeofday(&tv, NULL);
+ if (ret != 0) {
+ DEBUG(1, ("gettimeofday failed, continuing.\n"));
+ }
+ tv.tv_sec += lreq->callback_delay;
+ tv.tv_usec = 0;
+ }
+
+ callback_ctx = talloc(lreq->cctx, struct callback_ctx);
+ if (callback_ctx == NULL) {
+ DEBUG(1, ("Cannot prepare callback data.\n"));
+ return;
+ }
+
+ callback_ctx->cctx = lreq->cctx;
+ callback_ctx->callback = lreq->callback;
+ callback_ctx->pam_status = (lreq->global_pam_status!=PAM_SUCCESS) ?
+ lreq->global_pam_status :
+ pam_status;
+ callback_ctx->domain = "LOCAL";
+
+ talloc_free(lreq);
+
+ te = tevent_add_timer(callback_ctx->cctx->ev, callback_ctx->cctx, tv,
+ LOCAL_call_callback, callback_ctx);
+ if (te == NULL) {
+ DEBUG(1, ("Cannot add callback to event loop.\n"));
+ return;
+ }
+}
+
+static void set_user_attr_callback(void *pvt, int ldb_status, struct ldb_result *res)
+{
+ int pam_status=PAM_SUCCESS;
+ struct LOCAL_request *lreq;
+
+ DEBUG(4, ("entering set_user_attr_callback, status [%d][%s]\n",
+ ldb_status, ldb_strerror(ldb_status)));
+
+ lreq = talloc_get_type(pvt, struct LOCAL_request);
+
+ sysdb_transaction_done(lreq->sysdb_req, ldb_status);
+
+ NEQ_CHECK_OR_JUMP(ldb_status, LDB_SUCCESS, ("set_user_attr failed.\n"),
+ pam_status, PAM_SYSTEM_ERR, done);
+
+done:
+ prepare_reply(lreq, pam_status);
+}
+
+static void set_user_attr_req(struct sysdb_req *req, void *pvt)
+{
+ int ret;
+ int pam_status=PAM_SUCCESS;
+ struct LOCAL_request *lreq;
+
+ DEBUG(4, ("entering set_user_attr_req\n"));
+
+ lreq = talloc_get_type(pvt, struct LOCAL_request);
+
+ lreq->sysdb_req = req;
+
+ ret = sysdb_set_user_attr(req, lreq->dbctx, lreq->domain_info->name,
+ lreq->pd->user, lreq->mod_attrs,
+ set_user_attr_callback, lreq);
+ if (ret != EOK) sysdb_transaction_done(lreq->sysdb_req, ret);
+ NEQ_CHECK_OR_JUMP(ret, EOK, ("sysdb_set_user_attr failed.\n"),
+ pam_status, PAM_SYSTEM_ERR, done);
+
+ return;
+done:
+ prepare_reply(lreq, pam_status);
+}
+
+static void do_successful_login(struct LOCAL_request *lreq)
+{
+ int ret;
+ int pam_status;
+ char *buffer;
+
+ lreq->mod_attrs = sysdb_new_attrs(lreq);
+ NULL_CHECK_OR_JUMP(lreq->mod_attrs, ("sysdb_new_attrs failed.\n"),
+ pam_status, PAM_SYSTEM_ERR, done);
+
+ buffer = talloc_asprintf(lreq, "%d", (int) time(NULL));
+ NULL_CHECK_OR_JUMP(buffer, ("talloc_asprintf failed.\n"), pam_status,
+ PAM_SYSTEM_ERR, done);
+
+ ret = sysdb_attrs_add_string(lreq->mod_attrs, SYSDB_USER_ATTR_LAST_LOGIN, buffer);
+ NEQ_CHECK_OR_JUMP(ret, EOK, ("sysdb_attrs_add_string failed.\n"),
+ pam_status, PAM_SYSTEM_ERR, done);
+ talloc_free(buffer);
+
+ buffer = talloc_asprintf(lreq, "0");
+ ret = sysdb_attrs_add_string(lreq->mod_attrs, "failedLoginAttempts", buffer);
+ NEQ_CHECK_OR_JUMP(ret, EOK, ("sysdb_attrs_add_string failed.\n"),
+ pam_status, PAM_SYSTEM_ERR, done);
+ talloc_free(buffer);
+
+ ret = sysdb_transaction(lreq, lreq->dbctx, set_user_attr_req, lreq);
+ NEQ_CHECK_OR_JUMP(ret, EOK, ("sysdb_transaction failed.\n"),
+ pam_status, PAM_SYSTEM_ERR, done);
+ return;
+
+done:
+
+ prepare_reply(lreq, pam_status);
+}
+
+static void do_failed_login(struct LOCAL_request *lreq)
+{
+ int ret;
+ int pam_status;
+ char *buffer;
+ int failedLoginAttempts;
+
+ lreq->global_pam_status = PAM_AUTH_ERR;
+/* TODO: maybe add more inteligent delay calculation */
+ lreq->callback_delay = 3;
+
+ lreq->mod_attrs = sysdb_new_attrs(lreq);
+ NULL_CHECK_OR_JUMP(lreq->mod_attrs, ("sysdb_new_attrs failed.\n"),
+ pam_status, PAM_SYSTEM_ERR, done);
+
+ buffer = talloc_asprintf(lreq, "%d", (int) time(NULL));
+ NULL_CHECK_OR_JUMP(buffer, ("talloc_asprintf failed.\n"), pam_status,
+ PAM_SYSTEM_ERR, done);
+
+ ret = sysdb_attrs_add_string(lreq->mod_attrs, "lastFailedLogin", buffer);
+ NEQ_CHECK_OR_JUMP(ret, EOK, ("sysdb_attrs_add_string failed.\n"),
+ pam_status, PAM_SYSTEM_ERR, done);
+ talloc_free(buffer);
+
+ failedLoginAttempts = ldb_msg_find_attr_as_int(lreq->res->msgs[0],
+ "failedLoginAttempts", 0);
+ buffer = talloc_asprintf(lreq, "%d", ++failedLoginAttempts);
+ NULL_CHECK_OR_JUMP(buffer, ("talloc_asprintf failed.\n"), pam_status,
+ PAM_SYSTEM_ERR, done);
+
+ ret = sysdb_attrs_add_string(lreq->mod_attrs, "failedLoginAttempts", buffer);
+ NEQ_CHECK_OR_JUMP(ret, EOK, ("sysdb_attrs_add_string failed.\n"),
+ pam_status, PAM_SYSTEM_ERR, done);
+ talloc_free(buffer);
+
+ ret = sysdb_transaction(lreq, lreq->dbctx, set_user_attr_req, lreq);
+ NEQ_CHECK_OR_JUMP(ret, EOK, ("sysdb_transaction failed.\n"),
+ pam_status, PAM_SYSTEM_ERR, done);
+ return;
+
+done:
+
+ prepare_reply(lreq, pam_status);
+}
+
+static void do_pam_acct_mgmt(struct LOCAL_request *lreq)
+{
+ int pam_status=PAM_SUCCESS;
+ const char *disabled=NULL;
+
+ disabled = ldb_msg_find_attr_as_string(lreq->res->msgs[0],
+ SYSDB_PW_DISABLED, NULL);
+ if (disabled != NULL &&
+ strncasecmp(disabled, "false",5)!=0 &&
+ strncasecmp(disabled, "no",2)!=0 ) {
+ lreq->global_pam_status = PAM_PERM_DENIED;
+ }
+
+ prepare_reply(lreq, pam_status);
+}
+
+static void do_pam_chauthtok(struct LOCAL_request *lreq)
+{
+ int ret;
+ int pam_status;
+ char *newauthtok;
+ char *salt;
+ char *new_hash;
+ char *timestamp;
+
+ ret = authtok2str(lreq, lreq->pd->newauthtok, lreq->pd->newauthtok_size,
+ &newauthtok);
+ NEQ_CHECK_OR_JUMP(ret, EOK, ("authtok2str failed.\n"), pam_status,
+ PAM_SYSTEM_ERR, done);
+ memset(lreq->pd->newauthtok, 0, lreq->pd->newauthtok_size);
+
+ salt = gen_salt();
+ NULL_CHECK_OR_JUMP(salt, ("Salt generation failed.\n"), pam_status,
+ PAM_SYSTEM_ERR, done);
+ DEBUG(4, ("Using salt [%s]\n", salt));
+
+ new_hash = nss_sha512_crypt(newauthtok, salt);
+ NULL_CHECK_OR_JUMP(new_hash, ("Hash generation failed.\n"), pam_status,
+ PAM_SYSTEM_ERR, done);
+ DEBUG(4, ("New hash [%s]\n", new_hash));
+ memset(newauthtok, 0, lreq->pd->newauthtok_size);
+ talloc_free(newauthtok);
+
+ lreq->mod_attrs = sysdb_new_attrs(lreq);
+ NULL_CHECK_OR_JUMP(lreq->mod_attrs, ("sysdb_new_attrs failed.\n"),
+ pam_status, PAM_SYSTEM_ERR, done);
+
+ ret = sysdb_attrs_add_string(lreq->mod_attrs, SYSDB_PW_PWD, new_hash);
+ NEQ_CHECK_OR_JUMP(ret, EOK, ("sysdb_attrs_add_string failed.\n"),
+ pam_status, PAM_SYSTEM_ERR, done);
+
+ timestamp = talloc_asprintf(lreq, "%d", (int) time(NULL));
+ NULL_CHECK_OR_JUMP(timestamp, ("talloc_asprintf failed.\n"), pam_status,
+ PAM_SYSTEM_ERR, done);
+
+ ret = sysdb_attrs_add_string(lreq->mod_attrs, "lastPasswordChange",
+ timestamp);
+ NEQ_CHECK_OR_JUMP(ret, EOK, ("sysdb_attrs_add_string failed.\n"),
+ pam_status, PAM_SYSTEM_ERR, done);
+ talloc_free(timestamp);
+
+ ret = sysdb_transaction(lreq, lreq->dbctx, set_user_attr_req, lreq);
+ NEQ_CHECK_OR_JUMP(ret, EOK, ("sysdb_transaction failed.\n"),
+ pam_status, PAM_SYSTEM_ERR, done);
+ return;
+done:
+
+ prepare_reply(lreq, pam_status);
+}
+
+static void pam_handler_callback(void *pvt, int ldb_status,
+ struct ldb_result *res)
{
int ret;
int pam_status = PAM_SUCCESS;
struct LOCAL_request *lreq;
- struct sysdb_ctx *dbctx=NULL;
- struct ldb_result *res=NULL;
- struct ldb_context *ldb_ctx;
struct ldb_dn *user_base_dn=NULL;
- struct ldb_message *msg;
- const char *attrs[] = {SYSDB_PW_NAME, SYSDB_PW_PWD, SYSDB_PW_DISABLED,
- NULL};
char *authtok=NULL;
char *newauthtok=NULL;
const char *username=NULL;
const char *password=NULL;
char *new_hash=NULL;
- const char *disabled=NULL;
- char *salt=NULL;
- struct callback_ctx *callback_ctx;
- int callback_delay;
- DEBUG(4, ("LOCAL pam handler.\n"));
lreq = talloc_get_type(pvt, struct LOCAL_request);
- ret = sysdb_init(lreq, lreq->cctx->ev, lreq->cctx->nctx->cdb, NULL, &dbctx);
- NEQ_CHECK_OR_JUMP(ret, EOK, ("Could not set up LOCAL db"),
- pam_status, PAM_SYSTEM_ERR, done);
-
- ldb_ctx = sysdb_ctx_get_ldb(dbctx);
+ DEBUG(4, ("pam_handler_callback called with ldb_status [%d].\n",
+ ldb_status));
-/* FIXME: replace with proper sysdb calls */
- user_base_dn = ldb_dn_new_fmt(lreq, ldb_ctx, SYSDB_TMPL_USER_BASE,
- "LOCAL");
- NULL_CHECK_OR_JUMP(user_base_dn, ("Could not set up user base dn"),
- pam_status, PAM_SYSTEM_ERR, done);
-
- ret = ldb_search(ldb_ctx, lreq, &res, user_base_dn, LDB_SCOPE_SUBTREE,
- attrs, SYSDB_PWNAM_FILTER, lreq->pd->user);
- NEQ_CHECK_OR_JUMP(ret, LDB_SUCCESS, ("ldb_search failed"),
+ NEQ_CHECK_OR_JUMP(ldb_status,LDB_SUCCESS, ("ldb search failed.\n"),
pam_status, PAM_SYSTEM_ERR, done);
+
if (res->count < 1) {
- DEBUG(4, ("No user found with filter ["SYSDB_PWNAM_FILTER"]\n", lreq->pd->user));
+ DEBUG(4, ("No user found with filter ["SYSDB_PWNAM_FILTER"]\n",
+ lreq->pd->user));
pam_status = PAM_USER_UNKNOWN;
goto done;
} else if (res->count > 1) {
- DEBUG(4, ("More than one object found with filter ["SYSDB_PWNAM_FILTER"]\n", lreq->pd->user));
+ DEBUG(4, ("More than one object found with filter ["SYSDB_PWNAM_FILTER"]\n"));
pam_status = PAM_SYSTEM_ERR;
goto done;
}
@@ -136,6 +358,8 @@ static void LOCAL_pam_handler(struct tevent_context *ev,
goto done;
}
+ lreq->res = res;
+
switch (lreq->pd->cmd) {
case SSS_PAM_AUTHENTICATE:
case SSS_PAM_CHAUTHTOK:
@@ -143,11 +367,7 @@ static void LOCAL_pam_handler(struct tevent_context *ev,
lreq->pd->authtok_size, &authtok);
NEQ_CHECK_OR_JUMP(ret, EOK, ("authtok2str failed.\n"),
pam_status, PAM_SYSTEM_ERR, done);
-
- ret = authtok2str(lreq, lreq->pd->newauthtok,
- lreq->pd->newauthtok_size, &newauthtok);
- NEQ_CHECK_OR_JUMP(ret, EOK, ("authtok2str failed.\n"),
- pam_status, PAM_SYSTEM_ERR, done);
+ memset(lreq->pd->authtok, 0, lreq->pd->authtok_size);
password = ldb_msg_find_attr_as_string(res->msgs[0], SYSDB_PW_PWD, NULL);
NULL_CHECK_OR_JUMP(password, ("No password stored.\n"),
@@ -155,62 +375,31 @@ static void LOCAL_pam_handler(struct tevent_context *ev,
DEBUG(4, ("user: [%s], password hash: [%s]\n", username, password));
new_hash = nss_sha512_crypt(authtok, password);
+ memset(authtok, 0, lreq->pd->authtok_size);
+ talloc_free(authtok);
+
if (strcmp(new_hash, password) != 0) {
DEBUG(1, ("Passwords do not match.\n"));
- pam_status = PAM_AUTH_ERR;
-/* TODO: maybe add more inteligent delay calculation */
- callback_delay = 3;
- goto done;
+ do_failed_login(lreq);
+ return;
}
+
pam_status = PAM_SUCCESS;
break;
}
switch (lreq->pd->cmd) {
case SSS_PAM_AUTHENTICATE:
- /* already done */
+ do_successful_login(lreq);
+ return;
break;
case SSS_PAM_CHAUTHTOK:
- salt = gen_salt();
- NULL_CHECK_OR_JUMP(salt, ("Salt generation failed.\n"),
- pam_status, PAM_SYSTEM_ERR, done);
- DEBUG(4, ("Using salt [%s]\n", salt));
-
- new_hash = nss_sha512_crypt(newauthtok, salt);
- NULL_CHECK_OR_JUMP(new_hash, ("Hash generation failed.\n"),
- pam_status, PAM_SYSTEM_ERR, done);
- DEBUG(4, ("New hash [%s]\n", new_hash));
-
- msg = ldb_msg_new(lreq);
- msg->dn = res->msgs[0]->dn;
- NULL_CHECK_OR_JUMP(msg, ("ldb_msg_new failed.\n"),
- pam_status, PAM_SYSTEM_ERR, done);
-
- ret = ldb_msg_add_empty(msg, SYSDB_PW_PWD, LDB_FLAG_MOD_REPLACE,
- NULL);
- NEQ_CHECK_OR_JUMP(ret, LDB_SUCCESS, ("ldb_msg_add_empty failed.\n"),
- pam_status, PAM_SYSTEM_ERR, done);
-
- ret = ldb_msg_add_string(msg, SYSDB_PW_PWD, new_hash);
- NEQ_CHECK_OR_JUMP(ret, LDB_SUCCESS, ("ldb_msg_add_string failed.\n"),
- pam_status, PAM_SYSTEM_ERR, done);
-
- ret = ldb_modify(ldb_ctx, msg);
- NEQ_CHECK_OR_JUMP(ret, LDB_SUCCESS, ("ldb_modify failed.\n"),
- pam_status, PAM_SYSTEM_ERR, done);
-
- pam_status = PAM_SUCCESS;
+ do_pam_chauthtok(lreq);
+ return;
break;
case SSS_PAM_ACCT_MGMT:
- disabled = ldb_msg_find_attr_as_string(res->msgs[0],
- SYSDB_PW_DISABLED, NULL);
- if (disabled == NULL ||
- strncasecmp(disabled, "false",5)==0 ||
- strncasecmp(disabled, "no",2)==0 ) {
- pam_status = PAM_SUCCESS;
- } else {
- pam_status = PAM_PERM_DENIED;
- }
+ do_pam_acct_mgmt(lreq);
+ return;
break;
case SSS_PAM_SETCRED:
pam_status = PAM_SUCCESS;
@@ -237,42 +426,27 @@ done:
memset(newauthtok, 0, lreq->pd->newauthtok_size);
talloc_free(res);
talloc_free(user_base_dn);
- talloc_free(dbctx);
-
- callback_ctx = talloc(lreq->cctx, struct callback_ctx);
- if (callback_ctx == NULL) {
- DEBUG(1, ("Cannot prepare callback data.\n"));
- return;
- }
-
- callback_ctx->cctx = lreq->cctx;
- callback_ctx->callback = lreq->callback;
- callback_ctx->pam_status = pam_status;
- callback_ctx->domain = "LOCAL";
-
- talloc_free(lreq);
- ret = gettimeofday(&tv, NULL);
- if (ret != 0) {
- DEBUG(1, ("gettimeofday failed, continuing.\n"));
- }
- tv.tv_sec += callback_delay;
- tv.tv_usec = 0;
-
- te = tevent_add_timer(ev, callback_ctx->cctx, tv, LOCAL_call_callback,
- callback_ctx);
- if (te == NULL) {
- DEBUG(1, ("Cannot add callback to event loop.\n"));
- return;
- }
+ prepare_reply(lreq, pam_status);
}
-int LOCAL_schedule_request(struct cli_ctx *cctx, pam_dp_callback_t callback,
- struct pam_data *pd)
+int LOCAL_pam_handler(struct cli_ctx *cctx, pam_dp_callback_t callback,
+ struct pam_data *pd)
{
- struct LOCAL_request *lreq;
- struct tevent_timer *te;
- struct timeval tv;
+ int ret;
+ struct LOCAL_request *lreq=NULL;
+
+ static const char *attrs[] = {SYSDB_PW_NAME,
+ SYSDB_PW_PWD,
+ SYSDB_PW_DISABLED,
+ SYSDB_USER_ATTR_LAST_LOGIN,
+ "lastPasswordChange",
+ "accountExpires",
+ "failedLoginAttempts",
+ "passwordHint",
+ "passwordHistory",
+ "lastFailedLogin",
+ NULL};
lreq = talloc(cctx, struct LOCAL_request);
if (!lreq) {
@@ -281,15 +455,30 @@ int LOCAL_schedule_request(struct cli_ctx *cctx, pam_dp_callback_t callback,
lreq->cctx = cctx;
lreq->pd = pd;
lreq->callback = callback;
+ lreq->global_pam_status = PAM_SUCCESS;
+ lreq->callback_delay = 0;
- /* fire immediately */
- tv.tv_sec = 0;
- tv.tv_usec = 0;
- te = tevent_add_timer(cctx->ev, cctx, tv, LOCAL_pam_handler, lreq);
- if (te == NULL) {
- return EIO;
+ DEBUG(4, ("LOCAL pam handler.\n"));
+
+ lreq->domain_info = btreemap_get_value(lreq->cctx->nctx->domain_map,
+ lreq->pd->domain);
+ NULL_CHECK_OR_JUMP(lreq->domain_info, ("Domain info not found.\n"),
+ ret, EINVAL, done);
+
+ lreq->dbctx = lreq->cctx->nctx->sysdb;
+
+ ret = sysdb_get_user_attr(lreq, lreq->dbctx, lreq->domain_info->name,
+ lreq->pd->user, attrs, 0, pam_handler_callback,
+ lreq);
+
+ if(ret != EOK) {
+ DEBUG(1, ("sysdb_get_user_attr failed.\n"));
+ goto done;
}
return EOK;
+done:
+ talloc_free(lreq);
+ return ret;
}
diff --git a/server/responder/pam/pam_LOCAL_domain.h b/server/responder/pam/pam_LOCAL_domain.h
index a0a7ec5e..6cac6075 100644
--- a/server/responder/pam/pam_LOCAL_domain.h
+++ b/server/responder/pam/pam_LOCAL_domain.h
@@ -3,7 +3,7 @@
#include "responder/pam/pamsrv.h"
-int LOCAL_schedule_request(struct cli_ctx *cctx, pam_dp_callback_t callback,
- struct pam_data *pd);
+int LOCAL_pam_handler(struct cli_ctx *cctx, pam_dp_callback_t callback,
+ struct pam_data *pd);
#endif /* __PAM_LOCAL_DOMAIN_H__ */
diff --git a/server/responder/pam/pamsrv_cmd.c b/server/responder/pam/pamsrv_cmd.c
index 6c518695..68a82472 100644
--- a/server/responder/pam/pamsrv_cmd.c
+++ b/server/responder/pam/pamsrv_cmd.c
@@ -160,7 +160,7 @@ static int pam_forwarder(struct cli_ctx *cctx, int pam_cmd)
}
if ( strncasecmp(pd->domain,"LOCAL",5) == 0 ) {
- return LOCAL_schedule_request(cctx, pam_reply, pd);
+ return LOCAL_pam_handler(cctx, pam_reply, pd);
};
ret=pam_dp_send_req(cctx, pam_reply, PAM_DP_TIMEOUT, pd);