Add ldap_krb5_ticket_lifetime option

12 files changed, 57 insertions, 13 deletions

diff --git a/src/config/SSSDConfig.py b/src/config/SSSDConfig.py
index ef16bb97..9e178f11 100644
--- a/src/config/SSSDConfig.py
+++ b/src/config/SSSDConfig.py
@@ -125,6 +125,7 @@ option_strings = {
     'ldap_krb5_keytab' : _('Kerberos service keytab'),
     'ldap_krb5_init_creds' : _('Use Kerberos auth for LDAP connection'),
     'ldap_referrals' : _('Follow LDAP referrals'),
+    'ldap_krb5_ticket_lifetime' : _('Lifetime of TGT for LDAP connection'),
 
     # [provider/ldap/id]
     'ldap_search_timeout' : _('Length of time to wait for a search request'),
diff --git a/src/man/sssd-ldap.5.xml b/src/man/sssd-ldap.5.xml
index c119e7f3..9b1f14b6 100644
--- a/src/man/sssd-ldap.5.xml
+++ b/src/man/sssd-ldap.5.xml
@@ -569,6 +569,19 @@
                 </varlistentry>
 
                 <varlistentry>
+                    <term>ldap_krb5_ticket_lifetime (integer)</term>
+                    <listitem>
+                        <para>
+                            Specifies the lifetime in seconds of the TGT if
+                            GSSAPI is used.
+                        </para>
+                        <para>
+                            Default: 86400 (24 hours)
+                        </para>
+                    </listitem>
+                </varlistentry>
+
+                <varlistentry>
                     <term>krb5_realm (string)</term>
                     <listitem>
                         <para>
diff --git a/src/providers/ipa/ipa_common.c b/src/providers/ipa/ipa_common.c
index 03c02367..36811720 100644
--- a/src/providers/ipa/ipa_common.c
+++ b/src/providers/ipa/ipa_common.c
@@ -70,7 +70,8 @@ struct dp_option ipa_def_ldap_opts[] = {
     { "ldap_pwd_policy", DP_OPT_STRING, { "none" } , NULL_STRING },
     { "ldap_referrals", DP_OPT_BOOL, BOOL_TRUE, BOOL_TRUE },
     { "account_cache_expiration", DP_OPT_NUMBER, { .number = 0 }, NULL_NUMBER },
-    { "ldap_dns_service_name", DP_OPT_STRING, { SSS_LDAP_SRV_NAME }, NULL_STRING }
+    { "ldap_dns_service_name", DP_OPT_STRING, { SSS_LDAP_SRV_NAME }, NULL_STRING },
+    { "ldap_krb5_ticket_lifetime", DP_OPT_NUMBER, { .number = (24 * 60 * 60) }, NULL_NUMBER }
 };
 
 struct sdap_attr_map ipa_attr_map[] = {
diff --git a/src/providers/ipa/ipa_common.h b/src/providers/ipa/ipa_common.h
index 14bd971e..f59a7d7b 100644
--- a/src/providers/ipa/ipa_common.h
+++ b/src/providers/ipa/ipa_common.h
@@ -35,7 +35,7 @@ struct ipa_service {
 /* the following defines are used to keep track of the options in the ldap
  * module, so that if they change and ipa is not updated correspondingly
  * this will trigger a runtime abort error */
-#define IPA_OPTS_BASIC_TEST 33
+#define IPA_OPTS_BASIC_TEST 34
 
 /* the following define is used to keep track of the options in the krb5
  * module, so that if they change and ipa is not updated correspondingly
diff --git a/src/providers/ldap/ldap_child.c b/src/providers/ldap/ldap_child.c
index 6a78ca01..3369d709 100644
--- a/src/providers/ldap/ldap_child.c
+++ b/src/providers/ldap/ldap_child.c
@@ -40,6 +40,7 @@ struct input_buffer {
     const char *realm_str;
     const char *princ_str;
     const char *keytab_name;
+    krb5_deltat lifetime;
 };
 
 static errno_t unpack_buffer(uint8_t *buf, size_t size,
@@ -86,6 +87,10 @@ static errno_t unpack_buffer(uint8_t *buf, size_t size,
         p += len;
     }
 
+    /* ticket lifetime */
+    SAFEALIGN_COPY_INT32_CHECK(&ibuf->lifetime, buf + p, size, &p);
+    DEBUG(7, ("lifetime: %d\n", ibuf->lifetime));
+
     return EOK;
 }
 
@@ -118,6 +123,7 @@ static int ldap_child_get_tgt_sync(TALLOC_CTX *memctx,
                                   const char *realm_str,
                                   const char *princ_str,
                                   const char *keytab_name,
+                                  const krb5_deltat lifetime,
                                   const char **ccname_out)
 {
     char *ccname;
@@ -220,8 +226,7 @@ static int ldap_child_get_tgt_sync(TALLOC_CTX *memctx,
     krb5_get_init_creds_opt_set_address_list(&options, NULL);
     krb5_get_init_creds_opt_set_forwardable(&options, 0);
     krb5_get_init_creds_opt_set_proxiable(&options, 0);
-    /* set a very short lifetime, we don't keep the ticket around */
-    krb5_get_init_creds_opt_set_tkt_life(&options, 300);
+    krb5_get_init_creds_opt_set_tkt_life(&options, lifetime);
 
     krberr = krb5_get_init_creds_keytab(context, &my_creds, kprinc,
                                         keytab, 0, NULL, &options);
@@ -392,7 +397,7 @@ int main(int argc, const char *argv[])
 
     kerr = ldap_child_get_tgt_sync(main_ctx,
                                    ibuf->realm_str, ibuf->princ_str,
-                                   ibuf->keytab_name, &ccname);
+                                   ibuf->keytab_name, ibuf->lifetime, &ccname);
     if (kerr != EOK) {
         DEBUG(1, ("ldap_child_get_tgt_sync failed.\n"));
         /* Do not return, must report failure */
diff --git a/src/providers/ldap/ldap_common.c b/src/providers/ldap/ldap_common.c
index 03b2133a..32057184 100644
--- a/src/providers/ldap/ldap_common.c
+++ b/src/providers/ldap/ldap_common.c
@@ -64,7 +64,8 @@ struct dp_option default_basic_opts[] = {
     { "ldap_pwd_policy", DP_OPT_STRING, { "none" } , NULL_STRING },
     { "ldap_referrals", DP_OPT_BOOL, BOOL_TRUE, BOOL_TRUE },
     { "account_cache_expiration", DP_OPT_NUMBER, { .number = 0 }, NULL_NUMBER },
-    { "ldap_dns_service_name", DP_OPT_STRING, { SSS_LDAP_SRV_NAME }, NULL_STRING }
+    { "ldap_dns_service_name", DP_OPT_STRING, { SSS_LDAP_SRV_NAME }, NULL_STRING },
+    { "ldap_krb5_ticket_lifetime", DP_OPT_NUMBER, { .number = (24 * 60 * 60) }, NULL_NUMBER }
 };
 
 struct sdap_attr_map generic_attr_map[] = {
diff --git a/src/providers/ldap/sdap.h b/src/providers/ldap/sdap.h
index a4da43b3..917e6010 100644
--- a/src/providers/ldap/sdap.h
+++ b/src/providers/ldap/sdap.h
@@ -151,6 +151,7 @@ enum sdap_basic_opt {
     SDAP_REFERRALS,
     SDAP_ACCOUNT_CACHE_EXPIRATION,
     SDAP_DNS_SERVICE_NAME,
+    SDAP_KRB5_TICKET_LIFETIME,
 
     SDAP_OPTS_BASIC /* opts counter */
 };
diff --git a/src/providers/ldap/sdap_async.h b/src/providers/ldap/sdap_async.h
index 888df6b4..1e52c480 100644
--- a/src/providers/ldap/sdap_async.h
+++ b/src/providers/ldap/sdap_async.h
@@ -65,7 +65,8 @@ struct tevent_req *sdap_kinit_send(TALLOC_CTX *memctx,
                                    int    timeout,
                                    const char *keytab,
                                    const char *principal,
-                                   const char *realm);
+                                   const char *realm,
+                                   int lifetime);
 int sdap_kinit_recv(struct tevent_req *req, enum sdap_result *result);
 
 struct tevent_req *sdap_auth_send(TALLOC_CTX *memctx,
diff --git a/src/providers/ldap/sdap_async_connection.c b/src/providers/ldap/sdap_async_connection.c
index bd8d4e96..2748ed51 100644
--- a/src/providers/ldap/sdap_async_connection.c
+++ b/src/providers/ldap/sdap_async_connection.c
@@ -607,14 +607,21 @@ struct tevent_req *sdap_kinit_send(TALLOC_CTX *memctx,
                                    int    timeout,
                                    const char *keytab,
                                    const char *principal,
-                                   const char *realm)
+                                   const char *realm,
+                                   int lifetime)
 {
     struct tevent_req *req;
     struct tevent_req *subreq;
     struct sdap_kinit_state *state;
     int ret;
 
-    DEBUG(6, ("Attempting kinit (%s, %s, %s)\n", keytab, principal, realm));
+    DEBUG(6, ("Attempting kinit (%s, %s, %s, %d)\n", keytab, principal, realm,
+                                                     lifetime));
+
+    if (lifetime < 0 || lifetime > INT32_MAX) {
+        DEBUG(1, ("Ticket lifetime out of range.\n"));
+        return NULL;
+    }
 
     req = tevent_req_create(memctx, &state, struct sdap_kinit_state);
     if (!req) return NULL;
@@ -629,7 +636,8 @@ struct tevent_req *sdap_kinit_send(TALLOC_CTX *memctx,
         }
     }
 
-    subreq = sdap_get_tgt_send(state, ev, realm, principal, keytab, timeout);
+    subreq = sdap_get_tgt_send(state, ev, realm, principal, keytab, lifetime,
+                               timeout);
     if (!subreq) {
         talloc_zfree(req);
         return NULL;
@@ -1055,7 +1063,9 @@ static void sdap_cli_kinit_step(struct tevent_req *req)
                         dp_opt_get_string(state->opts->basic,
                                                    SDAP_SASL_AUTHID),
                         dp_opt_get_string(state->opts->basic,
-                                                   SDAP_KRB5_REALM));
+                                                   SDAP_KRB5_REALM),
+                        dp_opt_get_int(state->opts->basic,
+                                                   SDAP_KRB5_TICKET_LIFETIME));
     if (!subreq) {
         tevent_req_error(req, ENOMEM);
         return;
diff --git a/src/providers/ldap/sdap_async_private.h b/src/providers/ldap/sdap_async_private.h
index c74a7e60..727cee2e 100644
--- a/src/providers/ldap/sdap_async_private.h
+++ b/src/providers/ldap/sdap_async_private.h
@@ -58,6 +58,7 @@ struct tevent_req *sdap_get_tgt_send(TALLOC_CTX *mem_ctx,
                                      const char *realm_str,
                                      const char *princ_str,
                                      const char *keytab_name,
+                                     int32_t lifetime,
                                      int timeout);
 
 int sdap_get_tgt_recv(struct tevent_req *req,
diff --git a/src/providers/ldap/sdap_child_helpers.c b/src/providers/ldap/sdap_child_helpers.c
index c61f3cce..b45e4eae 100644
--- a/src/providers/ldap/sdap_child_helpers.c
+++ b/src/providers/ldap/sdap_child_helpers.c
@@ -137,6 +137,7 @@ static errno_t create_tgt_req_send_buffer(TALLOC_CTX *mem_ctx,
                                           const char *realm_str,
                                           const char *princ_str,
                                           const char *keytab_name,
+                                          int32_t lifetime,
                                           struct io_buffer **io_buf)
 {
     struct io_buffer *buf;
@@ -148,7 +149,7 @@ static errno_t create_tgt_req_send_buffer(TALLOC_CTX *mem_ctx,
         return ENOMEM;
     }
 
-    buf->size = 3 * sizeof(uint32_t);
+    buf->size = 4 * sizeof(uint32_t);
     if (realm_str) {
         buf->size += strlen(realm_str);
     }
@@ -194,6 +195,9 @@ static errno_t create_tgt_req_send_buffer(TALLOC_CTX *mem_ctx,
         SAFEALIGN_SET_UINT32(&buf->data[rp], 0, &rp);
     }
 
+    /* lifetime */
+    SAFEALIGN_SET_UINT32(&buf->data[rp], lifetime, &rp);
+
     *io_buf = buf;
     return EOK;
 }
@@ -248,6 +252,7 @@ struct tevent_req *sdap_get_tgt_send(TALLOC_CTX *mem_ctx,
                                      const char *realm_str,
                                      const char *princ_str,
                                      const char *keytab_name,
+                                     int32_t lifetime,
                                      int timeout)
 {
     struct tevent_req *req, *subreq;
@@ -274,7 +279,7 @@ struct tevent_req *sdap_get_tgt_send(TALLOC_CTX *mem_ctx,
 
     /* prepare the data to pass to child */
     ret = create_tgt_req_send_buffer(state,
-                                     realm_str, princ_str, keytab_name,
+                                     realm_str, princ_str, keytab_name, lifetime,
                                      &buf);
     if (ret != EOK) {
         DEBUG(1, ("create_tgt_req_send_buffer failed.\n"));
diff --git a/src/util/util.h b/src/util/util.h
index 25e7b6c2..58c51a0a 100644
--- a/src/util/util.h
+++ b/src/util/util.h
@@ -198,6 +198,11 @@ safealign_memcpy(void *dest, const void *src, size_t n, size_t *counter)
     safealign_memcpy(dest, src, sizeof(uint32_t), pctr); \
 } while(0)
 
+#define SAFEALIGN_COPY_INT32_CHECK(dest, src, len, pctr) do { \
+    if ((*(pctr) + sizeof(int32_t)) > (len)) return EINVAL; \
+    safealign_memcpy(dest, src, sizeof(int32_t), pctr); \
+} while(0)
+
 #include "util/dlinklist.h"
 
 /* From debug.c */