Initial checkin of gRPC to third_party/

third_party/grpc/src/php/ext/grpc/call_credentials.c

Index: third_party/grpc/src/php/ext/grpc/call_credentials.c
diff --git a/third_party/grpc/src/php/ext/grpc/call_credentials.c b/third_party/grpc/src/php/ext/grpc/call_credentials.c
new file mode 100644
index 0000000000000000000000000000000000000000..285c4e7c85612ade2993be1c4beb62345fb7e65e
--- /dev/null
+++ b/third_party/grpc/src/php/ext/grpc/call_credentials.c
@@ -0,0 +1,237 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "channel_credentials.h"
+#include "call_credentials.h"
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <php.h>
+#include <php_ini.h>
+#include <ext/standard/info.h>
+#include <ext/spl/spl_exceptions.h>
+#include "php_grpc.h"
+#include "call.h"
+
+#include <zend_exceptions.h>
+#include <zend_hash.h>
+
+#include <grpc/grpc.h>
+#include <grpc/grpc_security.h>
+
+zend_class_entry *grpc_ce_call_credentials;
+
+/* Frees and destroys an instance of wrapped_grpc_call_credentials */
+void free_wrapped_grpc_call_credentials(void *object TSRMLS_DC) {
+  wrapped_grpc_call_credentials *creds =
+      (wrapped_grpc_call_credentials *)object;
+  if (creds->wrapped != NULL) {
+    grpc_call_credentials_release(creds->wrapped);
+  }
+  efree(creds);
+}
+
+/* Initializes an instance of wrapped_grpc_call_credentials to be
+ * associated with an object of a class specified by class_type */
+zend_object_value create_wrapped_grpc_call_credentials(
+    zend_class_entry *class_type TSRMLS_DC) {
+  zend_object_value retval;
+  wrapped_grpc_call_credentials *intern;
+
+  intern = (wrapped_grpc_call_credentials *)emalloc(
+      sizeof(wrapped_grpc_call_credentials));
+  memset(intern, 0, sizeof(wrapped_grpc_call_credentials));
+
+  zend_object_std_init(&intern->std, class_type TSRMLS_CC);
+  object_properties_init(&intern->std, class_type);
+  retval.handle = zend_objects_store_put(
+      intern, (zend_objects_store_dtor_t)zend_objects_destroy_object,
+      free_wrapped_grpc_call_credentials, NULL TSRMLS_CC);
+  retval.handlers = zend_get_std_object_handlers();
+  return retval;
+}
+
+zval *grpc_php_wrap_call_credentials(grpc_call_credentials *wrapped) {
+  zval *credentials_object;
+  MAKE_STD_ZVAL(credentials_object);
+  object_init_ex(credentials_object, grpc_ce_call_credentials);
+  wrapped_grpc_call_credentials *credentials =
+      (wrapped_grpc_call_credentials *)zend_object_store_get_object(
+          credentials_object TSRMLS_CC);
+  credentials->wrapped = wrapped;
+  return credentials_object;
+}
+
+/**
+ * Create composite credentials from two existing credentials.
+ * @param CallCredentials cred1 The first credential
+ * @param CallCredentials cred2 The second credential
+ * @return CallCredentials The new composite credentials object
+ */
+PHP_METHOD(CallCredentials, createComposite) {
+  zval *cred1_obj;
+  zval *cred2_obj;
+
+  /* "OO" == 2 Objects */
+  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "OO", &cred1_obj,
+                            grpc_ce_call_credentials, &cred2_obj,
+                            grpc_ce_call_credentials) == FAILURE) {
+    zend_throw_exception(spl_ce_InvalidArgumentException,
+                         "createComposite expects 2 CallCredentials",
+                         1 TSRMLS_CC);
+    return;
+  }
+  wrapped_grpc_call_credentials *cred1 =
+      (wrapped_grpc_call_credentials *)zend_object_store_get_object(
+          cred1_obj TSRMLS_CC);
+  wrapped_grpc_call_credentials *cred2 =
+      (wrapped_grpc_call_credentials *)zend_object_store_get_object(
+          cred2_obj TSRMLS_CC);
+  grpc_call_credentials *creds =
+      grpc_composite_call_credentials_create(cred1->wrapped, cred2->wrapped,
+                                             NULL);
+  zval *creds_object = grpc_php_wrap_call_credentials(creds);
+  RETURN_DESTROY_ZVAL(creds_object);
+}
+
+/**
+ * Create a call credentials object from the plugin API
+ * @param function callback The callback function
+ * @return CallCredentials The new call credentials object
+ */
+PHP_METHOD(CallCredentials, createFromPlugin) {
+  zend_fcall_info *fci;
+  zend_fcall_info_cache *fci_cache;
+
+  fci = (zend_fcall_info *)emalloc(sizeof(zend_fcall_info));
+  fci_cache = (zend_fcall_info_cache *)emalloc(sizeof(zend_fcall_info_cache));
+  memset(fci, 0, sizeof(zend_fcall_info));
+  memset(fci_cache, 0, sizeof(zend_fcall_info_cache));
+
+  /* "f" == 1 function */
+  if (zend_parse_parameters(ZEND_NUM_ARGS(), "f", fci,
+                            fci_cache,
+                            fci->params,
+                            fci->param_count) == FAILURE) {
+    zend_throw_exception(spl_ce_InvalidArgumentException,
+                         "createFromPlugin expects 1 callback",
+                         1 TSRMLS_CC);
+    return;
+  }
+
+  plugin_state *state;
+  state = (plugin_state *)emalloc(sizeof(plugin_state));
+  memset(state, 0, sizeof(plugin_state));
+
+  /* save the user provided PHP callback function */
+  state->fci = fci;
+  state->fci_cache = fci_cache;
+
+  grpc_metadata_credentials_plugin plugin;
+  plugin.get_metadata = plugin_get_metadata;
+  plugin.destroy = plugin_destroy_state;
+  plugin.state = (void *)state;
+  plugin.type = "";
+
+  grpc_call_credentials *creds = grpc_metadata_credentials_create_from_plugin(
+      plugin, NULL);
+  zval *creds_object = grpc_php_wrap_call_credentials(creds);
+  RETURN_DESTROY_ZVAL(creds_object);
+}
+
+/* Callback function for plugin creds API */
+void plugin_get_metadata(void *ptr, grpc_auth_metadata_context context,
+                         grpc_credentials_plugin_metadata_cb cb,
+                         void *user_data) {
+  plugin_state *state = (plugin_state *)ptr;
+
+  /* prepare to call the user callback function with info from the
+   * grpc_auth_metadata_context */
+  zval **params[1];
+  zval *arg;
+  zval *retval;
+  MAKE_STD_ZVAL(arg);
+  object_init(arg);
+  add_property_string(arg, "service_url", context.service_url, true);
+  add_property_string(arg, "method_name", context.method_name, true);
+  params[0] = &arg;
+  state->fci->param_count = 1;
+  state->fci->params = params;
+  state->fci->retval_ptr_ptr = &retval;
+
+  /* call the user callback function */
+  zend_call_function(state->fci, state->fci_cache);
+
+  if (Z_TYPE_P(retval) != IS_ARRAY) {
+    zend_throw_exception(spl_ce_InvalidArgumentException,
+                         "plugin callback must return metadata array",
+                         1 TSRMLS_CC);
+  }
+
+  grpc_metadata_array metadata;
+  if (!create_metadata_array(retval, &metadata)) {
+    zend_throw_exception(spl_ce_InvalidArgumentException,
+                         "invalid metadata", 1 TSRMLS_CC);
+    grpc_metadata_array_destroy(&metadata);
+  }
+
+  /* TODO: handle error */
+  grpc_status_code code = GRPC_STATUS_OK;
+
+  /* Pass control back to core */
+  cb(user_data, metadata.metadata, metadata.count, code, NULL);
+}
+
+/* Cleanup function for plugin creds API */
+void plugin_destroy_state(void *ptr) {
+  plugin_state *state = (plugin_state *)ptr;
+  efree(state->fci);
+  efree(state->fci_cache);
+  efree(state);
+}
+
+static zend_function_entry call_credentials_methods[] = {
+  PHP_ME(CallCredentials, createComposite, NULL,
+         ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
+  PHP_ME(CallCredentials, createFromPlugin, NULL,
+         ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
+  PHP_FE_END};
+
+void grpc_init_call_credentials(TSRMLS_D) {
+  zend_class_entry ce;
+  INIT_CLASS_ENTRY(ce, "Grpc\\CallCredentials", call_credentials_methods);
+  ce.create_object = create_wrapped_grpc_call_credentials;
+  grpc_ce_call_credentials = zend_register_internal_class(&ce TSRMLS_CC);
+}