| /* |
| * |
| * 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 <string.h> |
| |
| #include "src/core/lib/channel/channel_args.h" |
| #include "src/core/lib/security/context/security_context.h" |
| #include "src/core/lib/support/string.h" |
| #include "src/core/lib/surface/api_trace.h" |
| #include "src/core/lib/surface/call.h" |
| |
| #include <grpc/grpc_security.h> |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.h> |
| |
| #ifndef NDEBUG |
| grpc_tracer_flag grpc_trace_auth_context_refcount = |
| GRPC_TRACER_INITIALIZER(false); |
| #endif |
| |
| /* --- grpc_call --- */ |
| |
| grpc_call_error grpc_call_set_credentials(grpc_call *call, |
| grpc_call_credentials *creds) { |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| grpc_client_security_context *ctx = NULL; |
| GRPC_API_TRACE("grpc_call_set_credentials(call=%p, creds=%p)", 2, |
| (call, creds)); |
| if (!grpc_call_is_client(call)) { |
| gpr_log(GPR_ERROR, "Method is client-side only."); |
| return GRPC_CALL_ERROR_NOT_ON_SERVER; |
| } |
| ctx = (grpc_client_security_context *)grpc_call_context_get( |
| call, GRPC_CONTEXT_SECURITY); |
| if (ctx == NULL) { |
| ctx = grpc_client_security_context_create(); |
| ctx->creds = grpc_call_credentials_ref(creds); |
| grpc_call_context_set(call, GRPC_CONTEXT_SECURITY, ctx, |
| grpc_client_security_context_destroy); |
| } else { |
| grpc_call_credentials_unref(&exec_ctx, ctx->creds); |
| ctx->creds = grpc_call_credentials_ref(creds); |
| } |
| grpc_exec_ctx_finish(&exec_ctx); |
| return GRPC_CALL_OK; |
| } |
| |
| grpc_auth_context *grpc_call_auth_context(grpc_call *call) { |
| void *sec_ctx = grpc_call_context_get(call, GRPC_CONTEXT_SECURITY); |
| GRPC_API_TRACE("grpc_call_auth_context(call=%p)", 1, (call)); |
| if (sec_ctx == NULL) return NULL; |
| return grpc_call_is_client(call) |
| ? GRPC_AUTH_CONTEXT_REF( |
| ((grpc_client_security_context *)sec_ctx)->auth_context, |
| "grpc_call_auth_context client") |
| : GRPC_AUTH_CONTEXT_REF( |
| ((grpc_server_security_context *)sec_ctx)->auth_context, |
| "grpc_call_auth_context server"); |
| } |
| |
| void grpc_auth_context_release(grpc_auth_context *context) { |
| GRPC_API_TRACE("grpc_auth_context_release(context=%p)", 1, (context)); |
| GRPC_AUTH_CONTEXT_UNREF(context, "grpc_auth_context_unref"); |
| } |
| |
| /* --- grpc_client_security_context --- */ |
| |
| grpc_client_security_context *grpc_client_security_context_create(void) { |
| return gpr_zalloc(sizeof(grpc_client_security_context)); |
| } |
| |
| void grpc_client_security_context_destroy(void *ctx) { |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| grpc_client_security_context *c = (grpc_client_security_context *)ctx; |
| grpc_call_credentials_unref(&exec_ctx, c->creds); |
| GRPC_AUTH_CONTEXT_UNREF(c->auth_context, "client_security_context"); |
| if (c->extension.instance != NULL && c->extension.destroy != NULL) { |
| c->extension.destroy(c->extension.instance); |
| } |
| gpr_free(ctx); |
| grpc_exec_ctx_finish(&exec_ctx); |
| } |
| |
| /* --- grpc_server_security_context --- */ |
| |
| grpc_server_security_context *grpc_server_security_context_create(void) { |
| return gpr_zalloc(sizeof(grpc_server_security_context)); |
| } |
| |
| void grpc_server_security_context_destroy(void *ctx) { |
| grpc_server_security_context *c = (grpc_server_security_context *)ctx; |
| GRPC_AUTH_CONTEXT_UNREF(c->auth_context, "server_security_context"); |
| if (c->extension.instance != NULL && c->extension.destroy != NULL) { |
| c->extension.destroy(c->extension.instance); |
| } |
| gpr_free(ctx); |
| } |
| |
| /* --- grpc_auth_context --- */ |
| |
| static grpc_auth_property_iterator empty_iterator = {NULL, 0, NULL}; |
| |
| grpc_auth_context *grpc_auth_context_create(grpc_auth_context *chained) { |
| grpc_auth_context *ctx = gpr_zalloc(sizeof(grpc_auth_context)); |
| gpr_ref_init(&ctx->refcount, 1); |
| if (chained != NULL) { |
| ctx->chained = GRPC_AUTH_CONTEXT_REF(chained, "chained"); |
| ctx->peer_identity_property_name = |
| ctx->chained->peer_identity_property_name; |
| } |
| return ctx; |
| } |
| |
| #ifndef NDEBUG |
| grpc_auth_context *grpc_auth_context_ref(grpc_auth_context *ctx, |
| const char *file, int line, |
| const char *reason) { |
| if (ctx == NULL) return NULL; |
| if (GRPC_TRACER_ON(grpc_trace_auth_context_refcount)) { |
| gpr_atm val = gpr_atm_no_barrier_load(&ctx->refcount.count); |
| gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, |
| "AUTH_CONTEXT:%p ref %" PRIdPTR " -> %" PRIdPTR " %s", ctx, val, |
| val + 1, reason); |
| } |
| #else |
| grpc_auth_context *grpc_auth_context_ref(grpc_auth_context *ctx) { |
| if (ctx == NULL) return NULL; |
| #endif |
| gpr_ref(&ctx->refcount); |
| return ctx; |
| } |
| |
| #ifndef NDEBUG |
| void grpc_auth_context_unref(grpc_auth_context *ctx, const char *file, int line, |
| const char *reason) { |
| if (ctx == NULL) return; |
| if (GRPC_TRACER_ON(grpc_trace_auth_context_refcount)) { |
| gpr_atm val = gpr_atm_no_barrier_load(&ctx->refcount.count); |
| gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, |
| "AUTH_CONTEXT:%p unref %" PRIdPTR " -> %" PRIdPTR " %s", ctx, val, |
| val - 1, reason); |
| } |
| #else |
| void grpc_auth_context_unref(grpc_auth_context *ctx) { |
| if (ctx == NULL) return; |
| #endif |
| if (gpr_unref(&ctx->refcount)) { |
| size_t i; |
| GRPC_AUTH_CONTEXT_UNREF(ctx->chained, "chained"); |
| if (ctx->properties.array != NULL) { |
| for (i = 0; i < ctx->properties.count; i++) { |
| grpc_auth_property_reset(&ctx->properties.array[i]); |
| } |
| gpr_free(ctx->properties.array); |
| } |
| gpr_free(ctx); |
| } |
| } |
| |
| const char *grpc_auth_context_peer_identity_property_name( |
| const grpc_auth_context *ctx) { |
| GRPC_API_TRACE("grpc_auth_context_peer_identity_property_name(ctx=%p)", 1, |
| (ctx)); |
| return ctx->peer_identity_property_name; |
| } |
| |
| int grpc_auth_context_set_peer_identity_property_name(grpc_auth_context *ctx, |
| const char *name) { |
| grpc_auth_property_iterator it = |
| grpc_auth_context_find_properties_by_name(ctx, name); |
| const grpc_auth_property *prop = grpc_auth_property_iterator_next(&it); |
| GRPC_API_TRACE( |
| "grpc_auth_context_set_peer_identity_property_name(ctx=%p, name=%s)", 2, |
| (ctx, name)); |
| if (prop == NULL) { |
| gpr_log(GPR_ERROR, "Property name %s not found in auth context.", |
| name != NULL ? name : "NULL"); |
| return 0; |
| } |
| ctx->peer_identity_property_name = prop->name; |
| return 1; |
| } |
| |
| int grpc_auth_context_peer_is_authenticated(const grpc_auth_context *ctx) { |
| GRPC_API_TRACE("grpc_auth_context_peer_is_authenticated(ctx=%p)", 1, (ctx)); |
| return ctx->peer_identity_property_name == NULL ? 0 : 1; |
| } |
| |
| grpc_auth_property_iterator grpc_auth_context_property_iterator( |
| const grpc_auth_context *ctx) { |
| grpc_auth_property_iterator it = empty_iterator; |
| GRPC_API_TRACE("grpc_auth_context_property_iterator(ctx=%p)", 1, (ctx)); |
| if (ctx == NULL) return it; |
| it.ctx = ctx; |
| return it; |
| } |
| |
| const grpc_auth_property *grpc_auth_property_iterator_next( |
| grpc_auth_property_iterator *it) { |
| GRPC_API_TRACE("grpc_auth_property_iterator_next(it=%p)", 1, (it)); |
| if (it == NULL || it->ctx == NULL) return NULL; |
| while (it->index == it->ctx->properties.count) { |
| if (it->ctx->chained == NULL) return NULL; |
| it->ctx = it->ctx->chained; |
| it->index = 0; |
| } |
| if (it->name == NULL) { |
| return &it->ctx->properties.array[it->index++]; |
| } else { |
| while (it->index < it->ctx->properties.count) { |
| const grpc_auth_property *prop = &it->ctx->properties.array[it->index++]; |
| GPR_ASSERT(prop->name != NULL); |
| if (strcmp(it->name, prop->name) == 0) { |
| return prop; |
| } |
| } |
| /* We could not find the name, try another round. */ |
| return grpc_auth_property_iterator_next(it); |
| } |
| } |
| |
| grpc_auth_property_iterator grpc_auth_context_find_properties_by_name( |
| const grpc_auth_context *ctx, const char *name) { |
| grpc_auth_property_iterator it = empty_iterator; |
| GRPC_API_TRACE("grpc_auth_context_find_properties_by_name(ctx=%p, name=%s)", |
| 2, (ctx, name)); |
| if (ctx == NULL || name == NULL) return empty_iterator; |
| it.ctx = ctx; |
| it.name = name; |
| return it; |
| } |
| |
| grpc_auth_property_iterator grpc_auth_context_peer_identity( |
| const grpc_auth_context *ctx) { |
| GRPC_API_TRACE("grpc_auth_context_peer_identity(ctx=%p)", 1, (ctx)); |
| if (ctx == NULL) return empty_iterator; |
| return grpc_auth_context_find_properties_by_name( |
| ctx, ctx->peer_identity_property_name); |
| } |
| |
| static void ensure_auth_context_capacity(grpc_auth_context *ctx) { |
| if (ctx->properties.count == ctx->properties.capacity) { |
| ctx->properties.capacity = |
| GPR_MAX(ctx->properties.capacity + 8, ctx->properties.capacity * 2); |
| ctx->properties.array = |
| gpr_realloc(ctx->properties.array, |
| ctx->properties.capacity * sizeof(grpc_auth_property)); |
| } |
| } |
| |
| void grpc_auth_context_add_property(grpc_auth_context *ctx, const char *name, |
| const char *value, size_t value_length) { |
| grpc_auth_property *prop; |
| GRPC_API_TRACE( |
| "grpc_auth_context_add_property(ctx=%p, name=%s, value=%*.*s, " |
| "value_length=%lu)", |
| 6, (ctx, name, (int)value_length, (int)value_length, value, |
| (unsigned long)value_length)); |
| ensure_auth_context_capacity(ctx); |
| prop = &ctx->properties.array[ctx->properties.count++]; |
| prop->name = gpr_strdup(name); |
| prop->value = gpr_malloc(value_length + 1); |
| memcpy(prop->value, value, value_length); |
| prop->value[value_length] = '\0'; |
| prop->value_length = value_length; |
| } |
| |
| void grpc_auth_context_add_cstring_property(grpc_auth_context *ctx, |
| const char *name, |
| const char *value) { |
| grpc_auth_property *prop; |
| GRPC_API_TRACE( |
| "grpc_auth_context_add_cstring_property(ctx=%p, name=%s, value=%s)", 3, |
| (ctx, name, value)); |
| ensure_auth_context_capacity(ctx); |
| prop = &ctx->properties.array[ctx->properties.count++]; |
| prop->name = gpr_strdup(name); |
| prop->value = gpr_strdup(value); |
| prop->value_length = strlen(value); |
| } |
| |
| void grpc_auth_property_reset(grpc_auth_property *property) { |
| gpr_free(property->name); |
| gpr_free(property->value); |
| memset(property, 0, sizeof(grpc_auth_property)); |
| } |
| |
| static void auth_context_pointer_arg_destroy(grpc_exec_ctx *exec_ctx, void *p) { |
| GRPC_AUTH_CONTEXT_UNREF(p, "auth_context_pointer_arg"); |
| } |
| |
| static void *auth_context_pointer_arg_copy(void *p) { |
| return GRPC_AUTH_CONTEXT_REF(p, "auth_context_pointer_arg"); |
| } |
| |
| static int auth_context_pointer_cmp(void *a, void *b) { return GPR_ICMP(a, b); } |
| |
| static const grpc_arg_pointer_vtable auth_context_pointer_vtable = { |
| auth_context_pointer_arg_copy, auth_context_pointer_arg_destroy, |
| auth_context_pointer_cmp}; |
| |
| grpc_arg grpc_auth_context_to_arg(grpc_auth_context *p) { |
| return grpc_channel_arg_pointer_create(GRPC_AUTH_CONTEXT_ARG, p, |
| &auth_context_pointer_vtable); |
| } |
| |
| grpc_auth_context *grpc_auth_context_from_arg(const grpc_arg *arg) { |
| if (strcmp(arg->key, GRPC_AUTH_CONTEXT_ARG) != 0) return NULL; |
| if (arg->type != GRPC_ARG_POINTER) { |
| gpr_log(GPR_ERROR, "Invalid type %d for arg %s", arg->type, |
| GRPC_AUTH_CONTEXT_ARG); |
| return NULL; |
| } |
| return arg->value.pointer.p; |
| } |
| |
| grpc_auth_context *grpc_find_auth_context_in_args( |
| const grpc_channel_args *args) { |
| size_t i; |
| if (args == NULL) return NULL; |
| for (i = 0; i < args->num_args; i++) { |
| grpc_auth_context *p = grpc_auth_context_from_arg(&args->args[i]); |
| if (p != NULL) return p; |
| } |
| return NULL; |
| } |