printing: add nt_printer_guid_retrieve() helper

This function connects to the domain controller and retrieves the
GUID for the corresponding printer DN.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=11018

Pair-programmed-with: Andreas Schneider <asn@samba.org>
Signed-off-by: David Disseldorp <ddiss@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
(cherry picked from commit 38dbd054dc331a441b10fdebbdb4bd0fc51cfc0a)

diff --git a/source3/include/nt_printing.h b/source3/include/nt_printing.h
index 2a0e8835dfb54fe6a0f41b93e9e5f90b596a833f..3dfe1bc2401a4d379e23966d8dc34614ea567931 100644 (file)
--- a/source3/include/nt_printing.h
+++ b/source3/include/nt_printing.h
@@ -132,6 +132,9 @@ bool print_access_check(const struct auth_session_info *server_info,
                        struct messaging_context *msg_ctx, int snum,
                        int access_type);
 
+WERROR nt_printer_guid_retrieve(TALLOC_CTX *mem_ctx, const char *printer,
+                               struct GUID *pguid);
+
 WERROR nt_printer_guid_get(TALLOC_CTX *mem_ctx,
                           const struct auth_session_info *session_info,
                           struct messaging_context *msg_ctx,

diff --git a/source3/printing/nt_printing_ads.c b/source3/printing/nt_printing_ads.c
index 3f39f527afdd0087963421073cda20745edc4986..e9c3e1a65b85ec2d8db82fbfd47b5067e3d50038 100644 (file)
--- a/source3/printing/nt_printing_ads.c
+++ b/source3/printing/nt_printing_ads.c
@@ -209,6 +209,58 @@ static WERROR nt_printer_guid_retrieve_internal(ADS_STRUCT *ads,
        return WERR_OK;
 }
 
+WERROR nt_printer_guid_retrieve(TALLOC_CTX *mem_ctx, const char *printer,
+                               struct GUID *pguid)
+{
+       ADS_STRUCT *ads = NULL;
+       char *old_krb5ccname = NULL;
+       char *printer_dn;
+       WERROR result;
+       ADS_STATUS ads_status;
+       TALLOC_CTX *tmp_ctx;
+
+       tmp_ctx = talloc_new(mem_ctx);
+       if (tmp_ctx == NULL) {
+               return WERR_NOMEM;
+       }
+
+       ads = ads_init(lp_realm(), lp_workgroup(), NULL);
+       if (ads == NULL) {
+               result = WERR_SERVER_UNAVAILABLE;
+               goto out;
+       }
+
+       old_krb5ccname = getenv(KRB5_ENV_CCNAME);
+       setenv(KRB5_ENV_CCNAME, "MEMORY:prtpub_cache", 1);
+       SAFE_FREE(ads->auth.password);
+       ads->auth.password = secrets_fetch_machine_password(lp_workgroup(),
+                                                           NULL, NULL);
+
+       ads_status = ads_connect(ads);
+       if (!ADS_ERR_OK(ads_status)) {
+               DEBUG(3, ("ads_connect failed: %s\n", ads_errstr(ads_status)));
+               result = WERR_ACCESS_DENIED;
+               goto out;
+       }
+
+       result = nt_printer_dn_lookup(tmp_ctx, ads, printer, &printer_dn);
+       if (!W_ERROR_IS_OK(result)) {
+               goto out;
+       }
+
+       result = nt_printer_guid_retrieve_internal(ads, printer_dn, pguid);
+out:
+       TALLOC_FREE(tmp_ctx);
+       ads_destroy(&ads);
+       ads_kdestroy("MEMORY:prtpub_cache");
+       unsetenv(KRB5_ENV_CCNAME);
+       if (old_krb5ccname != NULL) {
+               setenv(KRB5_ENV_CCNAME, old_krb5ccname, 0);
+       }
+
+       return result;
+}
+
 WERROR nt_printer_guid_get(TALLOC_CTX *mem_ctx,
                           const struct auth_session_info *session_info,
                           struct messaging_context *msg_ctx,
@@ -652,6 +704,12 @@ bool is_printer_published(TALLOC_CTX *mem_ctx,
        return true;
 }
 #else
+WERROR nt_printer_guid_retrieve(TALLOC_CTX *mem_ctx, const char *printer,
+                               struct GUID *pguid)
+{
+       return WERR_NOT_SUPPORTED;
+}
+
 WERROR nt_printer_guid_get(TALLOC_CTX *mem_ctx,
                           const struct auth_session_info *session_info,
                           struct messaging_context *msg_ctx,