From a2cabe1873c4d01c18ef6617b6b1f10a0ce3560e Mon Sep 17 00:00:00 2001
From: eindenbom <eindenbom@gmail.com>
Date: Fri, 2 Jul 2010 18:38:48 +0400
Subject: GSSAPI ticket expiry time is returned from ldap_child and stored in
 sdap_handle for future reference.

---
 src/providers/ldap/ldap_child.c | 35 ++++++++++++++++++++++++++++-------
 1 file changed, 28 insertions(+), 7 deletions(-)

(limited to 'src/providers/ldap/ldap_child.c')

diff --git a/src/providers/ldap/ldap_child.c b/src/providers/ldap/ldap_child.c
index 3369d709..19162e92 100644
--- a/src/providers/ldap/ldap_child.c
+++ b/src/providers/ldap/ldap_child.c
@@ -94,13 +94,13 @@ static errno_t unpack_buffer(uint8_t *buf, size_t size,
     return EOK;
 }
 
-static int pack_buffer(struct response *r, int result, const char *msg)
+static int pack_buffer(struct response *r, int result, const char *msg, time_t expire_time)
 {
     int len;
     size_t p = 0;
 
     len = strlen(msg);
-    r->size = 2 * sizeof(uint32_t) + len;
+    r->size = 2 * sizeof(uint32_t) + len + sizeof(time_t);
 
     r->buf = talloc_array(r, uint8_t, r->size);
     if(!r->buf) {
@@ -116,6 +116,9 @@ static int pack_buffer(struct response *r, int result, const char *msg)
     /* message itself */
     safealign_memcpy(&r->buf[p], msg, len, &p);
 
+    /* ticket expiration time */
+    safealign_memcpy(&r->buf[p], &expire_time, sizeof(expire_time), &p);
+
     return EOK;
 }
 
@@ -124,7 +127,8 @@ static int ldap_child_get_tgt_sync(TALLOC_CTX *memctx,
                                   const char *princ_str,
                                   const char *keytab_name,
                                   const krb5_deltat lifetime,
-                                  const char **ccname_out)
+                                  const char **ccname_out,
+                                  time_t *expire_time_out)
 {
     char *ccname;
     char *realm_name = NULL;
@@ -136,6 +140,8 @@ static int ldap_child_get_tgt_sync(TALLOC_CTX *memctx,
     krb5_creds my_creds;
     krb5_get_init_creds_opt options;
     krb5_error_code krberr;
+    krb5_timestamp kdc_time_offset;
+    int kdc_time_offset_usec;
     int ret;
 
     krberr = krb5_init_context(&context);
@@ -254,8 +260,20 @@ static int ldap_child_get_tgt_sync(TALLOC_CTX *memctx,
         goto done;
     }
 
+    krberr = krb5_get_time_offsets(context, &kdc_time_offset, &kdc_time_offset_usec);
+    if (krberr) {
+        DEBUG(2, ("Failed to get KDC time offset: %s\n",
+                  sss_krb5_get_error_message(context, krberr)));
+        kdc_time_offset = 0;
+    } else {
+        if (kdc_time_offset_usec > 0) {
+            kdc_time_offset++;
+        }
+    }
+
     ret = EOK;
     *ccname_out = ccname;
+    *expire_time_out = my_creds.times.endtime - kdc_time_offset;
 
 done:
     if (keytab) krb5_kt_close(context, keytab);
@@ -265,6 +283,7 @@ done:
 
 static int prepare_response(TALLOC_CTX *mem_ctx,
                             const char *ccname,
+                            time_t expire_time,
                             krb5_error_code kerr,
                             struct response **rsp)
 {
@@ -279,7 +298,7 @@ static int prepare_response(TALLOC_CTX *mem_ctx,
     r->size = 0;
 
     if (kerr == 0) {
-        ret = pack_buffer(r, EOK, ccname);
+        ret = pack_buffer(r, EOK, ccname, expire_time);
     } else {
         krb5_msg = sss_krb5_get_error_message(krb5_error_ctx, kerr);
         if (krb5_msg == NULL) {
@@ -287,7 +306,7 @@ static int prepare_response(TALLOC_CTX *mem_ctx,
             return ENOMEM;
         }
 
-        ret = pack_buffer(r, EFAULT, krb5_msg);
+        ret = pack_buffer(r, EFAULT, krb5_msg, 0);
         sss_krb5_free_error_message(krb5_error_ctx, krb5_msg);
     }
 
@@ -311,6 +330,7 @@ int main(int argc, const char *argv[])
     uint8_t *buf = NULL;
     ssize_t len = 0;
     const char *ccname = NULL;
+    time_t expire_time = 0;
     struct input_buffer *ibuf = NULL;
     struct response *resp = NULL;
     size_t written;
@@ -397,13 +417,14 @@ int main(int argc, const char *argv[])
 
     kerr = ldap_child_get_tgt_sync(main_ctx,
                                    ibuf->realm_str, ibuf->princ_str,
-                                   ibuf->keytab_name, ibuf->lifetime, &ccname);
+                                   ibuf->keytab_name, ibuf->lifetime,
+                                   &ccname, &expire_time);
     if (kerr != EOK) {
         DEBUG(1, ("ldap_child_get_tgt_sync failed.\n"));
         /* Do not return, must report failure */
     }
 
-    ret = prepare_response(main_ctx, ccname, kerr, &resp);
+    ret = prepare_response(main_ctx, ccname, expire_time, kerr, &resp);
     if (ret != EOK) {
         DEBUG(1, ("prepare_response failed. [%d][%s].\n", ret, strerror(ret)));
         return ENOMEM;
-- 
cgit