| /* |
| * |
| * Copyright 2015 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include <ruby/ruby.h> |
| |
| #include "rb_call_credentials.h" |
| #include "rb_grpc_imports.generated.h" |
| |
| #include <ruby/thread.h> |
| |
| #include <grpc/grpc.h> |
| #include <grpc/grpc_security.h> |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| |
| #include "rb_call.h" |
| #include "rb_event_thread.h" |
| #include "rb_grpc.h" |
| |
| /* grpc_rb_cCallCredentials is the ruby class that proxies |
| * grpc_call_credentials */ |
| static VALUE grpc_rb_cCallCredentials = Qnil; |
| |
| /* grpc_rb_call_credentials wraps a grpc_call_credentials. It provides a mark |
| * object that is used to hold references to any objects used to create the |
| * credentials. */ |
| typedef struct grpc_rb_call_credentials { |
| /* Holder of ruby objects involved in contructing the credentials */ |
| VALUE mark; |
| |
| /* The actual credentials */ |
| grpc_call_credentials* wrapped; |
| } grpc_rb_call_credentials; |
| |
| typedef struct callback_params { |
| VALUE get_metadata; |
| grpc_auth_metadata_context context; |
| void* user_data; |
| grpc_credentials_plugin_metadata_cb callback; |
| } callback_params; |
| |
| static VALUE grpc_rb_call_credentials_callback(VALUE callback_args) { |
| VALUE result = rb_hash_new(); |
| VALUE metadata = rb_funcall(rb_ary_entry(callback_args, 0), rb_intern("call"), |
| 1, rb_ary_entry(callback_args, 1)); |
| rb_hash_aset(result, rb_str_new2("metadata"), metadata); |
| rb_hash_aset(result, rb_str_new2("status"), INT2NUM(GRPC_STATUS_OK)); |
| rb_hash_aset(result, rb_str_new2("details"), rb_str_new2("")); |
| return result; |
| } |
| |
| static VALUE grpc_rb_call_credentials_callback_rescue(VALUE args, |
| VALUE exception_object) { |
| VALUE result = rb_hash_new(); |
| VALUE backtrace = |
| rb_funcall(rb_funcall(exception_object, rb_intern("backtrace"), 0), |
| rb_intern("join"), 1, rb_str_new2("\n\tfrom ")); |
| VALUE rb_exception_info = |
| rb_funcall(exception_object, rb_intern("inspect"), 0); |
| (void)args; |
| gpr_log(GPR_INFO, "Call credentials callback failed: %s\n%s", |
| StringValueCStr(rb_exception_info), StringValueCStr(backtrace)); |
| rb_hash_aset(result, rb_str_new2("metadata"), Qnil); |
| rb_hash_aset(result, rb_str_new2("status"), |
| INT2NUM(GRPC_STATUS_UNAUTHENTICATED)); |
| rb_hash_aset(result, rb_str_new2("details"), rb_exception_info); |
| return result; |
| } |
| |
| static void grpc_rb_call_credentials_callback_with_gil(void* param) { |
| callback_params* const params = (callback_params*)param; |
| VALUE auth_uri = rb_str_new_cstr(params->context.service_url); |
| /* Pass the arguments to the proc in a hash, which currently only has they key |
| 'auth_uri' */ |
| VALUE callback_args = rb_ary_new(); |
| VALUE args = rb_hash_new(); |
| VALUE result; |
| grpc_metadata_array md_ary; |
| grpc_status_code status; |
| VALUE details; |
| char* error_details; |
| grpc_metadata_array_init(&md_ary); |
| rb_hash_aset(args, ID2SYM(rb_intern("jwt_aud_uri")), auth_uri); |
| rb_ary_push(callback_args, params->get_metadata); |
| rb_ary_push(callback_args, args); |
| result = rb_rescue(grpc_rb_call_credentials_callback, callback_args, |
| grpc_rb_call_credentials_callback_rescue, Qnil); |
| // Both callbacks return a hash, so result should be a hash |
| grpc_rb_md_ary_convert(rb_hash_aref(result, rb_str_new2("metadata")), |
| &md_ary); |
| status = NUM2INT(rb_hash_aref(result, rb_str_new2("status"))); |
| details = rb_hash_aref(result, rb_str_new2("details")); |
| error_details = StringValueCStr(details); |
| params->callback(params->user_data, md_ary.metadata, md_ary.count, status, |
| error_details); |
| grpc_rb_metadata_array_destroy_including_entries(&md_ary); |
| gpr_free(params); |
| } |
| |
| static int grpc_rb_call_credentials_plugin_get_metadata( |
| void* state, grpc_auth_metadata_context context, |
| grpc_credentials_plugin_metadata_cb cb, void* user_data, |
| grpc_metadata creds_md[GRPC_METADATA_CREDENTIALS_PLUGIN_SYNC_MAX], |
| size_t* num_creds_md, grpc_status_code* status, |
| const char** error_details) { |
| callback_params* params = gpr_malloc(sizeof(callback_params)); |
| params->get_metadata = (VALUE)state; |
| params->context = context; |
| params->user_data = user_data; |
| params->callback = cb; |
| |
| grpc_rb_event_queue_enqueue(grpc_rb_call_credentials_callback_with_gil, |
| (void*)(params)); |
| return 0; // Async return. |
| } |
| |
| static void grpc_rb_call_credentials_plugin_destroy(void* state) { |
| (void)state; |
| // Not sure what needs to be done here |
| } |
| |
| /* Destroys the credentials instances. */ |
| static void grpc_rb_call_credentials_free(void* p) { |
| grpc_rb_call_credentials* wrapper; |
| if (p == NULL) { |
| return; |
| } |
| wrapper = (grpc_rb_call_credentials*)p; |
| grpc_call_credentials_release(wrapper->wrapped); |
| wrapper->wrapped = NULL; |
| |
| xfree(p); |
| } |
| |
| /* Protects the mark object from GC */ |
| static void grpc_rb_call_credentials_mark(void* p) { |
| grpc_rb_call_credentials* wrapper = NULL; |
| if (p == NULL) { |
| return; |
| } |
| wrapper = (grpc_rb_call_credentials*)p; |
| if (wrapper->mark != Qnil) { |
| rb_gc_mark(wrapper->mark); |
| } |
| } |
| |
| static rb_data_type_t grpc_rb_call_credentials_data_type = { |
| "grpc_call_credentials", |
| {grpc_rb_call_credentials_mark, |
| grpc_rb_call_credentials_free, |
| GRPC_RB_MEMSIZE_UNAVAILABLE, |
| {NULL, NULL}}, |
| NULL, |
| NULL, |
| #ifdef RUBY_TYPED_FREE_IMMEDIATELY |
| RUBY_TYPED_FREE_IMMEDIATELY |
| #endif |
| }; |
| |
| /* Allocates CallCredentials instances. |
| Provides safe initial defaults for the instance fields. */ |
| static VALUE grpc_rb_call_credentials_alloc(VALUE cls) { |
| grpc_rb_call_credentials* wrapper = ALLOC(grpc_rb_call_credentials); |
| wrapper->wrapped = NULL; |
| wrapper->mark = Qnil; |
| return TypedData_Wrap_Struct(cls, &grpc_rb_call_credentials_data_type, |
| wrapper); |
| } |
| |
| /* Creates a wrapping object for a given call credentials. This should only be |
| * called with grpc_call_credentials objects that are not already associated |
| * with any Ruby object */ |
| VALUE grpc_rb_wrap_call_credentials(grpc_call_credentials* c, VALUE mark) { |
| VALUE rb_wrapper; |
| grpc_rb_call_credentials* wrapper; |
| if (c == NULL) { |
| return Qnil; |
| } |
| rb_wrapper = grpc_rb_call_credentials_alloc(grpc_rb_cCallCredentials); |
| TypedData_Get_Struct(rb_wrapper, grpc_rb_call_credentials, |
| &grpc_rb_call_credentials_data_type, wrapper); |
| wrapper->wrapped = c; |
| wrapper->mark = mark; |
| return rb_wrapper; |
| } |
| |
| /* The attribute used on the mark object to hold the callback */ |
| static ID id_callback; |
| |
| /* |
| call-seq: |
| creds = Credentials.new auth_proc |
| proc: (required) Proc that generates auth metadata |
| Initializes CallCredential instances. */ |
| static VALUE grpc_rb_call_credentials_init(VALUE self, VALUE proc) { |
| grpc_rb_call_credentials* wrapper = NULL; |
| grpc_call_credentials* creds = NULL; |
| grpc_metadata_credentials_plugin plugin; |
| |
| grpc_ruby_once_init(); |
| |
| TypedData_Get_Struct(self, grpc_rb_call_credentials, |
| &grpc_rb_call_credentials_data_type, wrapper); |
| |
| plugin.get_metadata = grpc_rb_call_credentials_plugin_get_metadata; |
| plugin.destroy = grpc_rb_call_credentials_plugin_destroy; |
| if (!rb_obj_is_proc(proc)) { |
| rb_raise(rb_eTypeError, "Argument to CallCredentials#new must be a proc"); |
| return Qnil; |
| } |
| plugin.state = (void*)proc; |
| plugin.type = ""; |
| |
| creds = grpc_metadata_credentials_create_from_plugin(plugin, NULL); |
| if (creds == NULL) { |
| rb_raise(rb_eRuntimeError, "could not create a credentials, not sure why"); |
| return Qnil; |
| } |
| |
| wrapper->mark = proc; |
| wrapper->wrapped = creds; |
| rb_ivar_set(self, id_callback, proc); |
| |
| return self; |
| } |
| |
| static VALUE grpc_rb_call_credentials_compose(int argc, VALUE* argv, |
| VALUE self) { |
| grpc_call_credentials* creds; |
| grpc_call_credentials* other; |
| grpc_call_credentials* prev = NULL; |
| VALUE mark; |
| if (argc == 0) { |
| return self; |
| } |
| mark = rb_ary_new(); |
| creds = grpc_rb_get_wrapped_call_credentials(self); |
| for (int i = 0; i < argc; i++) { |
| rb_ary_push(mark, argv[i]); |
| other = grpc_rb_get_wrapped_call_credentials(argv[i]); |
| creds = grpc_composite_call_credentials_create(creds, other, NULL); |
| if (prev != NULL) { |
| grpc_call_credentials_release(prev); |
| } |
| prev = creds; |
| } |
| return grpc_rb_wrap_call_credentials(creds, mark); |
| } |
| |
| void Init_grpc_call_credentials() { |
| grpc_rb_cCallCredentials = |
| rb_define_class_under(grpc_rb_mGrpcCore, "CallCredentials", rb_cObject); |
| |
| /* Allocates an object managed by the ruby runtime */ |
| rb_define_alloc_func(grpc_rb_cCallCredentials, |
| grpc_rb_call_credentials_alloc); |
| |
| /* Provides a ruby constructor and support for dup/clone. */ |
| rb_define_method(grpc_rb_cCallCredentials, "initialize", |
| grpc_rb_call_credentials_init, 1); |
| rb_define_method(grpc_rb_cCallCredentials, "initialize_copy", |
| grpc_rb_cannot_init_copy, 1); |
| rb_define_method(grpc_rb_cCallCredentials, "compose", |
| grpc_rb_call_credentials_compose, -1); |
| |
| id_callback = rb_intern("__callback"); |
| } |
| |
| /* Gets the wrapped grpc_call_credentials from the ruby wrapper */ |
| grpc_call_credentials* grpc_rb_get_wrapped_call_credentials(VALUE v) { |
| grpc_rb_call_credentials* wrapper = NULL; |
| TypedData_Get_Struct(v, grpc_rb_call_credentials, |
| &grpc_rb_call_credentials_data_type, wrapper); |
| return wrapper->wrapped; |
| } |