Load default roots.pem in PHP via grpc_set_ssl_roots_override_callback

src/php/ext/grpc/channel_credentials.c

@@ -47,11 +47,23 @@
 #include <zend_exceptions.h>
 #include <zend_hash.h>
 
+#include <grpc/support/alloc.h>
 #include <grpc/grpc.h>
 #include <grpc/grpc_security.h>
 
 zend_class_entry *grpc_ce_channel_credentials;
 
+static char *default_pem_root_certs = NULL;
+
+static grpc_ssl_roots_override_result get_ssl_roots_override(
+    char **pem_root_certs) {
+  *pem_root_certs = default_pem_root_certs;
+  if (default_pem_root_certs == NULL) {
+    return GRPC_SSL_ROOTS_OVERRIDE_FAIL;
+  }
+  return GRPC_SSL_ROOTS_OVERRIDE_OK;
+}
+
 /* Frees and destroys an instance of wrapped_grpc_channel_credentials */
 void free_wrapped_grpc_channel_credentials(void *object TSRMLS_DC) {
   wrapped_grpc_channel_credentials *creds =
@@ -93,6 +105,24 @@ zval *grpc_php_wrap_channel_credentials(grpc_channel_credentials *wrapped TSRMLS
   return credentials_object;
 }
 
+/**
+ * Set default roots pem.
+ * @param string pem_roots PEM encoding of the server root certificates
+ * @return void
+ */
+PHP_METHOD(ChannelCredentials, setDefaultRootsPem) {
+  char *pem_roots;
+  int pem_roots_length;
+  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &pem_roots,
+                            &pem_roots_length) == FAILURE) {
+    zend_throw_exception(spl_ce_InvalidArgumentException,
+                         "setDefaultRootsPem expects 1 string", 1 TSRMLS_CC);
+    return;
+  }
+  default_pem_root_certs = gpr_malloc((pem_roots_length + 1) * sizeof(char));
+  memcpy(default_pem_root_certs, pem_roots, pem_roots_length + 1);
+}
+
 /**
  * Create a default channel credentials object.
  * @return ChannelCredentials The new default channel credentials object
@@ -178,6 +208,8 @@ PHP_METHOD(ChannelCredentials, createInsecure) {
 }
 
 static zend_function_entry channel_credentials_methods[] = {
+  PHP_ME(ChannelCredentials, setDefaultRootsPem, NULL,
+         ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
   PHP_ME(ChannelCredentials, createDefault, NULL,
          ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
   PHP_ME(ChannelCredentials, createSsl, NULL,
@@ -192,6 +224,7 @@ void grpc_init_channel_credentials(TSRMLS_D) {
   zend_class_entry ce;
   INIT_CLASS_ENTRY(ce, "Grpc\\ChannelCredentials",
                    channel_credentials_methods);
+  grpc_set_ssl_roots_override_callback(get_ssl_roots_override);
   ce.create_object = create_wrapped_grpc_channel_credentials;
   grpc_ce_channel_credentials = zend_register_internal_class(&ce TSRMLS_CC);
 }

src/php/lib/Grpc/BaseStub.php

@@ -56,6 +56,10 @@ class BaseStub
      */
     public function __construct($hostname, $opts, $channel = null)
     {
+        $ssl_roots = file_get_contents(
+            dirname(__FILE__).'/../../../../etc/roots.pem');
+        ChannelCredentials::setDefaultRootsPem($ssl_roots);
+
         $this->hostname = $hostname;
         $this->update_metadata = null;
         if (isset($opts['update_metadata'])) {

tools/dockerfile/interoptest/grpc_interop_php/build_interop.sh

@@ -40,8 +40,6 @@ cp -r /var/local/jenkins/service_account $HOME || true
 cd /var/local/git/grpc
 rvm --default use ruby-2.1
 
-make install-certs
-
 # gRPC core and protobuf need to be installed
 make install