+++ /dev/null
-/* Copyright (c) 2012 Apple Inc. All rights reserved. */
-
-#include "agent.h"
-#include "authitems.h"
-#include "authd_private.h"
-#include "process.h"
-#include "mechanism.h"
-#include "authutilities.h"
-#include "authtoken.h"
-#include "session.h"
-#include "debugging.h"
-#include "engine.h"
-
-#import <xpc/private.h>
-#include <Security/AuthorizationPlugin.h>
-
-#include <mach/mach.h>
-#include <servers/bootstrap.h>
-#include <bootstrap_priv.h>
-
-#define SECURITYAGENT_BOOTSTRAP_NAME_BASE "com.apple.security.agentMain"
-#define SECURITYAGENT_STUB_BOOTSTRAP_NAME_BASE "com.apple.security.agentStub"
-//#define SECURITYAGENT_LOGINWINDOW_BOOTSTRAP_NAME_BASE "com.apple.security.agent.login"
-#define AUTHORIZATIONHOST_BOOTSTRAP_NAME_BASE "com.apple.security.authhost"
-
-#define UUID_INITIALIZER_FROM_SESSIONID(sessionid) \
-{ 0,0,0,0, 0,0,0,0, 0,0,0,0, (unsigned char)((0xff000000 & (sessionid))>>24), (unsigned char)((0x00ff0000 & (sessionid))>>16), (unsigned char)((0x0000ff00 & (sessionid))>>8), (unsigned char)((0x000000ff & (sessionid))) }
-
-struct _agent_s {
- __AUTH_BASE_STRUCT_HEADER__;
-
- auth_items_t hints;
- auth_items_t context;
- mechanism_t mech;
- engine_t engine;
- PluginState pluginState;
- uint64_t status;
-
- xpc_connection_t agentConnection;
- xpc_connection_t agentStubConnection;
- dispatch_queue_t eventQueue;
- dispatch_queue_t actionQueue;
-
- pid_t agentPid;
-};
-
-static void
-_agent_finalize(CFTypeRef value)
-{
- agent_t agent = (agent_t)value;
-
- // If this ever becomes a concurrent queue, then this would need to be a barrier sync
- dispatch_sync(agent->eventQueue, ^{
- // Mark the agent as dead
- agent->pluginState = dead;
- });
-
- // We're going away, which means no outside references exist. It's safe to dispose of the XPC connection.
- if (NULL != agent->agentConnection) {
- xpc_release(agent->agentConnection);
- agent->agentConnection = NULL;
- }
-
- if (NULL != agent->agentStubConnection) {
- xpc_release(agent->agentStubConnection);
- agent->agentStubConnection = NULL;
- }
-
- // Now that we've released any XPC connection that may (or may not) be present
- // it's safe to go ahead and free our memory. This is provided that all other
- // blocks that were added to the event queue before the axe came down on the
- // xpc connection have been executed.
-
- // If this ever becomes a concurrent queue, then this would need to be a barrier sync
- dispatch_sync(agent->eventQueue, ^{
- CFReleaseSafe(agent->hints);
- CFReleaseSafe(agent->context);
- CFReleaseSafe(agent->mech);
- CFReleaseSafe(agent->engine);
- dispatch_release(agent->actionQueue);
- });
-
- dispatch_release(agent->eventQueue);
-
- LOGD("agent[%i]: _agent_finalize called", agent->agentPid);
-}
-
-AUTH_TYPE_INSTANCE(agent,
- .init = NULL,
- .copy = NULL,
- .finalize = _agent_finalize,
- .equal = NULL,
- .hash = NULL,
- .copyFormattingDesc = NULL,
- .copyDebugDesc = NULL
- );
-
-static CFTypeID agent_get_type_id() {
- static CFTypeID type_id = _kCFRuntimeNotATypeID;
- static dispatch_once_t onceToken;
-
- dispatch_once(&onceToken, ^{
- type_id = _CFRuntimeRegisterClass(&_auth_type_agent);
- });
-
- return type_id;
-}
-
-agent_t
-agent_create(engine_t engine, mechanism_t mech, auth_token_t auth, process_t proc, bool firstMech)
-{
- bool doSwitchAudit = false;
- bool doSwitchBootstrap = false;
- agent_t agent = NULL;
-
- agent = (agent_t)_CFRuntimeCreateInstance(kCFAllocatorDefault, agent_get_type_id(), AUTH_CLASS_SIZE(agent), NULL);
- require(agent != NULL, done);
-
- agent->mech = (mechanism_t)CFRetain(mech);
- agent->engine = (engine_t)CFRetain(engine);
- agent->hints = auth_items_create();
- agent->context = auth_items_create();
- agent->pluginState = init;
- agent->agentPid = process_get_pid(proc);
- agent->agentStubConnection = NULL;
-
- const audit_info_s *audit_info = auth_token_get_audit_info(auth);
-
- auditinfo_addr_t tempAddr;
- tempAddr.ai_asid = audit_info->asid;
- auditon(A_GETSINFO_ADDR, &tempAddr, sizeof(tempAddr));
-
- LOGV("agent[%i]: Stored auid %d fetched auid %d", agent->agentPid, audit_info->auid, tempAddr.ai_auid);
- uid_t auid = tempAddr.ai_auid;
- uuid_t sessionUUID = UUID_INITIALIZER_FROM_SESSIONID((uint32_t)audit_info->asid);
-
- agent->eventQueue = dispatch_queue_create("Agent Event Queue", 0);
- agent->actionQueue = dispatch_queue_create("Agent Action Queue", 0);
-
- mach_port_t bootstrapPort = process_get_bootstrap(proc);
- if (!mechanism_is_privileged(mech)) {
- if ((int32_t)auid != -1) {
- agent->agentStubConnection = xpc_connection_create_mach_service(SECURITYAGENT_STUB_BOOTSTRAP_NAME_BASE, NULL, 0);
- xpc_connection_set_target_uid(agent->agentStubConnection, auid);
- LOGV("agent[%i]: Creating a security agent stub", agent->agentPid);
- xpc_connection_set_event_handler(agent->agentStubConnection, ^(xpc_object_t object){}); // Yes, this is a dummy handler, we never ever care about any responses from the stub. It can die in a fire for all I care.
- xpc_connection_resume(agent->agentStubConnection);
-
- xpc_object_t wakeupMessage = xpc_dictionary_create(NULL, NULL, 0);
- xpc_dictionary_set_data(wakeupMessage, AUTH_XPC_SESSION_UUID, sessionUUID, sizeof(uuid_t));
- xpc_object_t responseMessage = xpc_connection_send_message_with_reply_sync(agent->agentStubConnection, wakeupMessage);
- if (xpc_get_type(responseMessage) == XPC_TYPE_DICTIONARY) {
- LOGV("agent[%i]: Valid response received from stub", agent->agentPid);
- } else {
- LOGV("agent[%i]: Error response received from stub", agent->agentPid);
- }
- xpc_release(wakeupMessage);
- xpc_release(responseMessage);
-
- mach_port_t newBootstrapPort = auth_token_get_creator_bootstrap(auth);
- if (newBootstrapPort != MACH_PORT_NULL) {
- bootstrapPort = newBootstrapPort;
- }
- }
-
- agent->agentConnection = xpc_connection_create_mach_service(SECURITYAGENT_BOOTSTRAP_NAME_BASE, NULL,0);
- xpc_connection_set_instance(agent->agentConnection, sessionUUID);
- LOGV("agent[%i]: Creating a security agent", agent->agentPid);
- doSwitchAudit = true;
- doSwitchBootstrap = true;
- } else {
- agent->agentConnection = xpc_connection_create_mach_service(AUTHORIZATIONHOST_BOOTSTRAP_NAME_BASE, NULL, 0);
- xpc_connection_set_instance(agent->agentConnection, sessionUUID);
- LOGV("agent[%i]: Creating a standard authhost", agent->agentPid);
- doSwitchAudit = true;
- doSwitchBootstrap = true;
- }
-
- // **************** Here's the event handler, since I can never find it
- xpc_connection_set_target_queue(agent->agentConnection, agent->eventQueue);
- xpc_connection_set_event_handler(agent->agentConnection, ^(xpc_object_t object) {
- char* objectDesc = xpc_copy_description(object);
- LOGV("agent[%i]: global xpc message received %s", agent->agentPid, objectDesc);
- free(objectDesc);
-
- if (agent->pluginState == dead) {
- // If the agent is dead for some reason, drop this message before we hurt ourselves.
- return;
- }
-
- if (xpc_get_type(object) == XPC_TYPE_DICTIONARY) {
- const char *replyType = xpc_dictionary_get_string(object, AUTH_XPC_REPLY_METHOD_KEY);
- if (0 == strcmp(replyType, AUTH_XPC_REPLY_METHOD_INTERRUPT)) {
- agent->pluginState = interrupting;
- engine_interrupt_agent(agent->engine);
- }
- }
- });
-
- xpc_connection_resume(agent->agentConnection);
-
- xpc_object_t requestObject = xpc_dictionary_create(NULL, NULL, 0);
- xpc_dictionary_set_string(requestObject, AUTH_XPC_REQUEST_METHOD_KEY, AUTH_XPC_REQUEST_METHOD_CREATE);
- xpc_dictionary_set_string(requestObject, AUTH_XPC_PLUGIN_NAME, mechanism_get_plugin(mech));
- xpc_dictionary_set_string(requestObject, AUTH_XPC_MECHANISM_NAME, mechanism_get_param(mech));
- if (doSwitchAudit) {
- mach_port_name_t jobPort;
- if (audit_info != NULL) {
- if (0 == audit_session_port(audit_info->asid, &jobPort)) {
- LOGV("agent[%i]: attaching an audit session port", agent->agentPid);
- xpc_dictionary_set_mach_send(requestObject, AUTH_XPC_AUDIT_SESSION_PORT, jobPort);
- }
- }
- }
-
- if (doSwitchBootstrap) {
- LOGV("agent[%i]: attaching a bootstrap port", agent->agentPid);
- xpc_dictionary_set_mach_send(requestObject, AUTH_XPC_BOOTSTRAP_PORT, bootstrapPort);
- }
-
- // This loop will be repeated until we can get ahold of a SecurityAgent, or get a fatal error
- // This will cause us to retry any CONNECTION_INTERRUPTED status messages
- do {
- xpc_object_t object = xpc_connection_send_message_with_reply_sync(agent->agentConnection, requestObject);
-
- if (xpc_get_type(object) == XPC_TYPE_DICTIONARY) {
- const char *replyType = xpc_dictionary_get_string(object, AUTH_XPC_REPLY_METHOD_KEY);
- if (0 == strcmp(replyType, AUTH_XPC_REPLY_METHOD_CREATE)) {
- agent->status = xpc_dictionary_get_uint64(object, AUTH_XPC_REPLY_RESULT_VALUE);
- if (agent->status == kAuthorizationResultAllow) {
- // Only go here if we have an "allow" from the SecurityAgent (the plugin create might have failed)
- // This is backwards compatible so that it goes gently into the build, as the default is "allow".
- agent->pluginState = created;
- } else {
- agent->pluginState = dead;
- }
- }
- } else if (xpc_get_type(object) == XPC_TYPE_ERROR) {
- if (object == XPC_ERROR_CONNECTION_INVALID) {
- agent->pluginState = dead;
- }
- }
- xpc_release(object);
- } while ((agent->pluginState == init) && (firstMech));
-
- xpc_release(requestObject);
-
- if (agent->pluginState != created) {
- CFRelease(agent);
- agent = NULL;
- }
-done:
- return agent;
-}
-
-uint64_t
-agent_run(agent_t agent, auth_items_t hints, auth_items_t context, auth_items_t immutable_hints)
-{
- xpc_object_t hintsArray = auth_items_export_xpc(hints);
- xpc_object_t contextArray = auth_items_export_xpc(context);
- xpc_object_t immutableHintsArray = auth_items_export_xpc(immutable_hints);
-
- dispatch_semaphore_t replyWaiter = dispatch_semaphore_create(0);
- dispatch_sync(agent->actionQueue, ^{
- if (agent->pluginState != mechinterrupting) {
- agent->pluginState = current;
- agent->status = kAuthorizationResultUndefined; // Set this while the plugin chews on the user input.
-
- auth_items_clear(agent->hints);
- auth_items_clear(agent->context);
-
- xpc_object_t requestObject = xpc_dictionary_create(NULL, NULL, 0);
- xpc_dictionary_set_string(requestObject, AUTH_XPC_REQUEST_METHOD_KEY, AUTH_XPC_REQUEST_METHOD_INVOKE);
- xpc_dictionary_set_value(requestObject, AUTH_XPC_HINTS_NAME, hintsArray);
- xpc_dictionary_set_value(requestObject, AUTH_XPC_CONTEXT_NAME, contextArray);
- xpc_dictionary_set_value(requestObject, AUTH_XPC_IMMUTABLE_HINTS_NAME, immutableHintsArray);
-
- xpc_connection_send_message_with_reply(agent->agentConnection, requestObject, agent->actionQueue, ^(xpc_object_t object){
- if (xpc_get_type(object) == XPC_TYPE_DICTIONARY) {
- const char *replyType = xpc_dictionary_get_string(object, AUTH_XPC_REPLY_METHOD_KEY);
- if (0 == strcmp(replyType, AUTH_XPC_REPLY_METHOD_RESULT)) {
- if (agent->pluginState == current) {
- xpc_object_t xpcContext = xpc_dictionary_get_value(object, AUTH_XPC_CONTEXT_NAME);
- xpc_object_t xpcHints = xpc_dictionary_get_value(object, AUTH_XPC_HINTS_NAME);
- auth_items_copy_xpc(agent->context, xpcContext);
- auth_items_copy_xpc(agent->hints, xpcHints);
- agent->status = xpc_dictionary_get_uint64(object, AUTH_XPC_REPLY_RESULT_VALUE);
- agent->pluginState = active;
- }
- }
- } else if (xpc_get_type(object) == XPC_TYPE_ERROR) {
- if ((object == XPC_ERROR_CONNECTION_INVALID) || (object == XPC_ERROR_CONNECTION_INTERRUPTED)) {
- agent->pluginState = dead;
- }
- }
- dispatch_semaphore_signal(replyWaiter);
- });
- xpc_release(requestObject);
- }
- });
-
- if (agent->pluginState == current) {
- dispatch_semaphore_wait(replyWaiter, DISPATCH_TIME_FOREVER);
- }
- dispatch_release(replyWaiter);
-
- LOGV("agent[%i]: Finished call to SecurityAgent", agent->agentPid);
-
- xpc_release(hintsArray);
- xpc_release(contextArray);
- xpc_release(immutableHintsArray);
-
- return agent->status;
-}
-
-auth_items_t
-agent_get_hints(agent_t agent)
-{
- return agent->hints;
-}
-
-auth_items_t
-agent_get_context(agent_t agent)
-{
- return agent->context;
-}
-
-mechanism_t
-agent_get_mechanism(agent_t agent)
-{
- return agent->mech;
-}
-
-void
-agent_deactivate(agent_t agent)
-{
- xpc_object_t requestObject = xpc_dictionary_create(NULL, NULL, 0);
- xpc_dictionary_set_string(requestObject, AUTH_XPC_REQUEST_METHOD_KEY, AUTH_XPC_REQUEST_METHOD_DEACTIVATE);
-
- agent->pluginState = deactivating;
-
- xpc_object_t object = xpc_connection_send_message_with_reply_sync(agent->agentConnection, requestObject);
- if (xpc_get_type(object) == XPC_TYPE_DICTIONARY) {
- const char *replyType = xpc_dictionary_get_string(object, AUTH_XPC_REPLY_METHOD_KEY);
- if (0 == strcmp(replyType, AUTH_XPC_REPLY_METHOD_DEACTIVATE)) {
- agent->pluginState = active; // This is strange, but true. We do actually want to set the state 'active'.
- }
- } else if (xpc_get_type(object) == XPC_TYPE_ERROR) {
- if ((object == XPC_ERROR_CONNECTION_INVALID) || (object == XPC_ERROR_CONNECTION_INTERRUPTED)) {
- agent->pluginState = dead;
- }
- }
- xpc_release(object);
- xpc_release(requestObject);
-}
-
-void agent_destroy(agent_t agent)
-{
- xpc_object_t requestObject = xpc_dictionary_create(NULL, NULL, 0);
- xpc_dictionary_set_string(requestObject, AUTH_XPC_REQUEST_METHOD_KEY, AUTH_XPC_REQUEST_METHOD_DESTROY);
- xpc_connection_send_message(agent->agentConnection, requestObject);
- xpc_release(requestObject);
-}
-
-PluginState
-agent_get_state(agent_t agent)
-{
- return agent->pluginState;
-}
-
-void
-agent_notify_interrupt(agent_t agent)
-{
- dispatch_sync(agent->actionQueue, ^{
- if (agent->pluginState == current) {
- xpc_object_t requestObject = xpc_dictionary_create(NULL, NULL, 0);
- xpc_dictionary_set_string(requestObject, AUTH_XPC_REQUEST_METHOD_KEY, AUTH_XPC_REQUEST_METHOD_INTERRUPT);
- xpc_connection_send_message(agent->agentConnection, requestObject);
- xpc_release(requestObject);
- } else if (agent->pluginState == active) {
- agent->pluginState = mechinterrupting;
- }
- });
-}
-
-void
-agent_clear_interrupt(agent_t agent)
-{
- dispatch_sync(agent->actionQueue, ^{
- if (agent->pluginState == mechinterrupting) {
- agent->pluginState = active;
- }
- });
-}
-
-void
-agent_recieve(agent_t agent)
-{
-}
projects / apple / security.git / blobdiff