s3-rpc_client: Added a winreg query sz helper.

Signed-off-by: Günther Deschner <gd@samba.org>

2 files changed, 104 insertions, 0 deletions

diff --git a/source3/rpc_client/cli_winreg.c b/source3/rpc_client/cli_winreg.c
index 081f951b2d..be58c1f1f4 100644
--- a/source3/rpc_client/cli_winreg.c
+++ b/source3/rpc_client/cli_winreg.c
@@ -244,6 +244,81 @@ NTSTATUS dcerpc_winreg_query_multi_sz(TALLOC_CTX *mem_ctx,
 	return status;
 }
 
+NTSTATUS dcerpc_winreg_query_sz(TALLOC_CTX *mem_ctx,
+				      struct dcerpc_binding_handle *h,
+				      struct policy_handle *key_handle,
+				      const char *value,
+				      const char **data,
+				      WERROR *pwerr)
+{
+	struct winreg_String wvalue;
+	enum winreg_Type type;
+	WERROR result = WERR_OK;
+	uint32_t value_len = 0;
+	uint32_t data_size = 0;
+	NTSTATUS status;
+	DATA_BLOB blob;
+
+	wvalue.name = value;
+
+	status = dcerpc_winreg_QueryValue(h,
+					  mem_ctx,
+					  key_handle,
+					  &wvalue,
+					  &type,
+					  NULL,
+					  &data_size,
+					  &value_len,
+					  &result);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+	if (!W_ERROR_IS_OK(result)) {
+		*pwerr = result;
+		return status;
+	}
+
+	if (type != REG_SZ) {
+		*pwerr = WERR_INVALID_DATATYPE;
+		return status;
+	}
+
+	blob = data_blob_talloc(mem_ctx, NULL, data_size);
+	if (blob.data == NULL) {
+		*pwerr = WERR_NOMEM;
+		return status;
+	}
+	value_len = 0;
+
+	status = dcerpc_winreg_QueryValue(h,
+					  mem_ctx,
+					  key_handle,
+					  &wvalue,
+					  &type,
+					  blob.data,
+					  &data_size,
+					  &value_len,
+					  &result);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+	if (!W_ERROR_IS_OK(result)) {
+		*pwerr = result;
+		return status;
+	}
+
+	if (data) {
+		bool ok;
+
+		ok = pull_reg_sz(mem_ctx, &blob, data);
+		if (!ok) {
+			*pwerr = WERR_NOMEM;
+		}
+	}
+
+	return status;
+}
+
 NTSTATUS dcerpc_winreg_set_dword(TALLOC_CTX *mem_ctx,
 				 struct dcerpc_binding_handle *h,
 				 struct policy_handle *key_handle,
diff --git a/source3/rpc_client/cli_winreg.h b/source3/rpc_client/cli_winreg.h
index e10792e574..7a6e814831 100644
--- a/source3/rpc_client/cli_winreg.h
+++ b/source3/rpc_client/cli_winreg.h
@@ -111,6 +111,35 @@ NTSTATUS dcerpc_winreg_query_multi_sz(TALLOC_CTX *mem_ctx,
 				      WERROR *pwerr);
 
 /**
+ * @brief Query a key for the specified sz value.
+ *
+ * Get the data that is associated with the named value of a specified registry
+ * open key. This function ensures that the key is a multi sz value.
+ *
+ * @param[in]  mem_ctx  The memory context to use.
+ *
+ * @param[in]  h        The binding handle for the rpc connection.
+ *
+ * @param[in]  key_handle A handle to a key that MUST have been opened
+ *                        previously.
+ *
+ * @param[in]  value    The name of the value to query.
+ *
+ * @param[out] data     A pointer to store the data of the value.
+ *
+ * @param[out] pwerr    A pointer to a WERROR to store result of the query.
+ *
+ * @return              NT_STATUS_OK on success or a corresponding error if
+ *                      there was a problem on the connection.
+ */
+NTSTATUS dcerpc_winreg_query_sz(TALLOC_CTX *mem_ctx,
+				struct dcerpc_binding_handle *h,
+				struct policy_handle *key_handle,
+				const char *value,
+				const char **data,
+				WERROR *pwerr);
+
+/**
  * @brief Set a value with the specified dword data.
  *
  * @param[in]  mem_ctx  The memory context to use.