| /* |
| * |
| * Copyright 2015-2016 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 "src/core/lib/security/credentials/composite/composite_credentials.h" |
| |
| #include <string.h> |
| |
| #include "src/core/lib/iomgr/polling_entity.h" |
| #include "src/core/lib/surface/api_trace.h" |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.h> |
| |
| /* -- Composite call credentials. -- */ |
| |
| typedef struct { |
| grpc_composite_call_credentials *composite_creds; |
| size_t creds_index; |
| grpc_polling_entity *pollent; |
| grpc_auth_metadata_context auth_md_context; |
| grpc_credentials_mdelem_array *md_array; |
| grpc_closure *on_request_metadata; |
| grpc_closure internal_on_request_metadata; |
| } grpc_composite_call_credentials_metadata_context; |
| |
| static void composite_call_destruct(grpc_exec_ctx *exec_ctx, |
| grpc_call_credentials *creds) { |
| grpc_composite_call_credentials *c = (grpc_composite_call_credentials *)creds; |
| for (size_t i = 0; i < c->inner.num_creds; i++) { |
| grpc_call_credentials_unref(exec_ctx, c->inner.creds_array[i]); |
| } |
| gpr_free(c->inner.creds_array); |
| } |
| |
| static void composite_call_metadata_cb(grpc_exec_ctx *exec_ctx, void *arg, |
| grpc_error *error) { |
| grpc_composite_call_credentials_metadata_context *ctx = |
| (grpc_composite_call_credentials_metadata_context *)arg; |
| if (error == GRPC_ERROR_NONE) { |
| /* See if we need to get some more metadata. */ |
| if (ctx->creds_index < ctx->composite_creds->inner.num_creds) { |
| grpc_call_credentials *inner_creds = |
| ctx->composite_creds->inner.creds_array[ctx->creds_index++]; |
| if (grpc_call_credentials_get_request_metadata( |
| exec_ctx, inner_creds, ctx->pollent, ctx->auth_md_context, |
| ctx->md_array, &ctx->internal_on_request_metadata, &error)) { |
| // Synchronous response, so call ourselves recursively. |
| composite_call_metadata_cb(exec_ctx, arg, error); |
| GRPC_ERROR_UNREF(error); |
| } |
| return; |
| } |
| // We're done! |
| } |
| GRPC_CLOSURE_SCHED(exec_ctx, ctx->on_request_metadata, GRPC_ERROR_REF(error)); |
| gpr_free(ctx); |
| } |
| |
| static bool composite_call_get_request_metadata( |
| grpc_exec_ctx *exec_ctx, grpc_call_credentials *creds, |
| grpc_polling_entity *pollent, grpc_auth_metadata_context auth_md_context, |
| grpc_credentials_mdelem_array *md_array, grpc_closure *on_request_metadata, |
| grpc_error **error) { |
| grpc_composite_call_credentials *c = (grpc_composite_call_credentials *)creds; |
| grpc_composite_call_credentials_metadata_context *ctx; |
| ctx = (grpc_composite_call_credentials_metadata_context *)gpr_zalloc( |
| sizeof(grpc_composite_call_credentials_metadata_context)); |
| ctx->composite_creds = c; |
| ctx->pollent = pollent; |
| ctx->auth_md_context = auth_md_context; |
| ctx->md_array = md_array; |
| ctx->on_request_metadata = on_request_metadata; |
| GRPC_CLOSURE_INIT(&ctx->internal_on_request_metadata, |
| composite_call_metadata_cb, ctx, grpc_schedule_on_exec_ctx); |
| bool synchronous = true; |
| while (ctx->creds_index < ctx->composite_creds->inner.num_creds) { |
| grpc_call_credentials *inner_creds = |
| ctx->composite_creds->inner.creds_array[ctx->creds_index++]; |
| if (grpc_call_credentials_get_request_metadata( |
| exec_ctx, inner_creds, ctx->pollent, ctx->auth_md_context, |
| ctx->md_array, &ctx->internal_on_request_metadata, error)) { |
| if (*error != GRPC_ERROR_NONE) break; |
| } else { |
| synchronous = false; // Async return. |
| break; |
| } |
| } |
| if (synchronous) gpr_free(ctx); |
| return synchronous; |
| } |
| |
| static void composite_call_cancel_get_request_metadata( |
| grpc_exec_ctx *exec_ctx, grpc_call_credentials *creds, |
| grpc_credentials_mdelem_array *md_array, grpc_error *error) { |
| grpc_composite_call_credentials *c = (grpc_composite_call_credentials *)creds; |
| for (size_t i = 0; i < c->inner.num_creds; ++i) { |
| grpc_call_credentials_cancel_get_request_metadata( |
| exec_ctx, c->inner.creds_array[i], md_array, GRPC_ERROR_REF(error)); |
| } |
| GRPC_ERROR_UNREF(error); |
| } |
| |
| static grpc_call_credentials_vtable composite_call_credentials_vtable = { |
| composite_call_destruct, composite_call_get_request_metadata, |
| composite_call_cancel_get_request_metadata}; |
| |
| static grpc_call_credentials_array get_creds_array( |
| grpc_call_credentials **creds_addr) { |
| grpc_call_credentials_array result; |
| grpc_call_credentials *creds = *creds_addr; |
| result.creds_array = creds_addr; |
| result.num_creds = 1; |
| if (strcmp(creds->type, GRPC_CALL_CREDENTIALS_TYPE_COMPOSITE) == 0) { |
| result = *grpc_composite_call_credentials_get_credentials(creds); |
| } |
| return result; |
| } |
| |
| grpc_call_credentials *grpc_composite_call_credentials_create( |
| grpc_call_credentials *creds1, grpc_call_credentials *creds2, |
| void *reserved) { |
| size_t i; |
| size_t creds_array_byte_size; |
| grpc_call_credentials_array creds1_array; |
| grpc_call_credentials_array creds2_array; |
| grpc_composite_call_credentials *c; |
| GRPC_API_TRACE( |
| "grpc_composite_call_credentials_create(creds1=%p, creds2=%p, " |
| "reserved=%p)", |
| 3, (creds1, creds2, reserved)); |
| GPR_ASSERT(reserved == NULL); |
| GPR_ASSERT(creds1 != NULL); |
| GPR_ASSERT(creds2 != NULL); |
| c = (grpc_composite_call_credentials *)gpr_zalloc( |
| sizeof(grpc_composite_call_credentials)); |
| c->base.type = GRPC_CALL_CREDENTIALS_TYPE_COMPOSITE; |
| c->base.vtable = &composite_call_credentials_vtable; |
| gpr_ref_init(&c->base.refcount, 1); |
| creds1_array = get_creds_array(&creds1); |
| creds2_array = get_creds_array(&creds2); |
| c->inner.num_creds = creds1_array.num_creds + creds2_array.num_creds; |
| creds_array_byte_size = c->inner.num_creds * sizeof(grpc_call_credentials *); |
| c->inner.creds_array = |
| (grpc_call_credentials **)gpr_zalloc(creds_array_byte_size); |
| for (i = 0; i < creds1_array.num_creds; i++) { |
| grpc_call_credentials *cur_creds = creds1_array.creds_array[i]; |
| c->inner.creds_array[i] = grpc_call_credentials_ref(cur_creds); |
| } |
| for (i = 0; i < creds2_array.num_creds; i++) { |
| grpc_call_credentials *cur_creds = creds2_array.creds_array[i]; |
| c->inner.creds_array[i + creds1_array.num_creds] = |
| grpc_call_credentials_ref(cur_creds); |
| } |
| return &c->base; |
| } |
| |
| const grpc_call_credentials_array * |
| grpc_composite_call_credentials_get_credentials(grpc_call_credentials *creds) { |
| const grpc_composite_call_credentials *c = |
| (const grpc_composite_call_credentials *)creds; |
| GPR_ASSERT(strcmp(creds->type, GRPC_CALL_CREDENTIALS_TYPE_COMPOSITE) == 0); |
| return &c->inner; |
| } |
| |
| grpc_call_credentials *grpc_credentials_contains_type( |
| grpc_call_credentials *creds, const char *type, |
| grpc_call_credentials **composite_creds) { |
| size_t i; |
| if (strcmp(creds->type, type) == 0) { |
| if (composite_creds != NULL) *composite_creds = NULL; |
| return creds; |
| } else if (strcmp(creds->type, GRPC_CALL_CREDENTIALS_TYPE_COMPOSITE) == 0) { |
| const grpc_call_credentials_array *inner_creds_array = |
| grpc_composite_call_credentials_get_credentials(creds); |
| for (i = 0; i < inner_creds_array->num_creds; i++) { |
| if (strcmp(type, inner_creds_array->creds_array[i]->type) == 0) { |
| if (composite_creds != NULL) *composite_creds = creds; |
| return inner_creds_array->creds_array[i]; |
| } |
| } |
| } |
| return NULL; |
| } |
| |
| /* -- Composite channel credentials. -- */ |
| |
| static void composite_channel_destruct(grpc_exec_ctx *exec_ctx, |
| grpc_channel_credentials *creds) { |
| grpc_composite_channel_credentials *c = |
| (grpc_composite_channel_credentials *)creds; |
| grpc_channel_credentials_unref(exec_ctx, c->inner_creds); |
| grpc_call_credentials_unref(exec_ctx, c->call_creds); |
| } |
| |
| static grpc_security_status composite_channel_create_security_connector( |
| grpc_exec_ctx *exec_ctx, grpc_channel_credentials *creds, |
| grpc_call_credentials *call_creds, const char *target, |
| const grpc_channel_args *args, grpc_channel_security_connector **sc, |
| grpc_channel_args **new_args) { |
| grpc_composite_channel_credentials *c = |
| (grpc_composite_channel_credentials *)creds; |
| grpc_security_status status = GRPC_SECURITY_ERROR; |
| |
| GPR_ASSERT(c->inner_creds != NULL && c->call_creds != NULL && |
| c->inner_creds->vtable != NULL && |
| c->inner_creds->vtable->create_security_connector != NULL); |
| /* If we are passed a call_creds, create a call composite to pass it |
| downstream. */ |
| if (call_creds != NULL) { |
| grpc_call_credentials *composite_call_creds = |
| grpc_composite_call_credentials_create(c->call_creds, call_creds, NULL); |
| status = c->inner_creds->vtable->create_security_connector( |
| exec_ctx, c->inner_creds, composite_call_creds, target, args, sc, |
| new_args); |
| grpc_call_credentials_unref(exec_ctx, composite_call_creds); |
| } else { |
| status = c->inner_creds->vtable->create_security_connector( |
| exec_ctx, c->inner_creds, c->call_creds, target, args, sc, new_args); |
| } |
| return status; |
| } |
| |
| static grpc_channel_credentials * |
| composite_channel_duplicate_without_call_credentials( |
| grpc_channel_credentials *creds) { |
| grpc_composite_channel_credentials *c = |
| (grpc_composite_channel_credentials *)creds; |
| return grpc_channel_credentials_ref(c->inner_creds); |
| } |
| |
| static grpc_channel_credentials_vtable composite_channel_credentials_vtable = { |
| composite_channel_destruct, composite_channel_create_security_connector, |
| composite_channel_duplicate_without_call_credentials}; |
| |
| grpc_channel_credentials *grpc_composite_channel_credentials_create( |
| grpc_channel_credentials *channel_creds, grpc_call_credentials *call_creds, |
| void *reserved) { |
| grpc_composite_channel_credentials *c = |
| (grpc_composite_channel_credentials *)gpr_zalloc(sizeof(*c)); |
| GPR_ASSERT(channel_creds != NULL && call_creds != NULL && reserved == NULL); |
| GRPC_API_TRACE( |
| "grpc_composite_channel_credentials_create(channel_creds=%p, " |
| "call_creds=%p, reserved=%p)", |
| 3, (channel_creds, call_creds, reserved)); |
| c->base.type = channel_creds->type; |
| c->base.vtable = &composite_channel_credentials_vtable; |
| gpr_ref_init(&c->base.refcount, 1); |
| c->inner_creds = grpc_channel_credentials_ref(channel_creds); |
| c->call_creds = grpc_call_credentials_ref(call_creds); |
| return &c->base; |
| } |