+++ /dev/null
-/* Copyright (c) 2012-2014 Apple Inc. All Rights Reserved. */
-
-#include "engine.h"
-#include "rule.h"
-#include "authitems.h"
-#include "authtoken.h"
-#include "agent.h"
-#include "process.h"
-#include "debugging.h"
-#include "server.h"
-#include "credential.h"
-#include "session.h"
-#include "mechanism.h"
-#include "authutilities.h"
-#include "ccaudit.h"
-#include "connection.h"
-
-#include <pwd.h>
-#include <Security/checkpw.h>
-int checkpw_internal( const struct passwd *pw, const char* password );
-
-#include <Security/AuthorizationTags.h>
-#include <Security/AuthorizationTagsPriv.h>
-#include <Security/AuthorizationPlugin.h>
-#include <sandbox.h>
-
-static void _set_process_hints(auth_items_t, process_t);
-static void _set_process_immutable_hints(auth_items_t, process_t);
-static void _set_auth_token_hints(auth_items_t, auth_token_t);
-static OSStatus _evaluate_user_credential_for_rule(engine_t, credential_t, rule_t, bool, bool, enum Reason *);
-static void _engine_set_credential(engine_t, credential_t, bool);
-static OSStatus _evaluate_rule(engine_t, rule_t, bool *);
-
-enum {
- kEngineHintsFlagTemporary = (1 << 30)
-};
-
-#pragma mark -
-#pragma mark engine creation
-
-struct _engine_s {
- __AUTH_BASE_STRUCT_HEADER__;
-
- connection_t conn;
- process_t proc;
- auth_token_t auth;
-
- AuthorizationFlags flags;
- auth_items_t hints;
- auth_items_t context;
- auth_items_t sticky_context;
- auth_items_t immutable_hints;
-
- auth_rights_t grantedRights;
-
- enum Reason reason;
- int32_t tries;
-
- CFAbsoluteTime now;
-
- credential_t sessionCredential;
- CFMutableSetRef credentials;
- CFMutableSetRef effectiveCredentials;
-
- CFMutableDictionaryRef mechanism_agents;
-
- // set only in engine_authorize
- const char * currentRightName; // weak ref
- rule_t currentRule; // weak ref
-
- rule_t authenticateRule;
-
- bool dismissed;
-};
-
-static void
-_engine_finalizer(CFTypeRef value)
-{
- engine_t engine = (engine_t)value;
-
- CFReleaseSafe(engine->mechanism_agents);
- CFReleaseSafe(engine->conn);
- CFReleaseSafe(engine->auth);
- CFReleaseSafe(engine->hints);
- CFReleaseSafe(engine->context);
- CFReleaseSafe(engine->immutable_hints);
- CFReleaseSafe(engine->sticky_context);
- CFReleaseSafe(engine->grantedRights);
- CFReleaseSafe(engine->sessionCredential);
- CFReleaseSafe(engine->credentials);
- CFReleaseSafe(engine->effectiveCredentials);
- CFReleaseSafe(engine->authenticateRule);
-}
-
-AUTH_TYPE_INSTANCE(engine,
- .init = NULL,
- .copy = NULL,
- .finalize = _engine_finalizer,
- .equal = NULL,
- .hash = NULL,
- .copyFormattingDesc = NULL,
- .copyDebugDesc = NULL
- );
-
-static CFTypeID engine_get_type_id() {
- static CFTypeID type_id = _kCFRuntimeNotATypeID;
- static dispatch_once_t onceToken;
-
- dispatch_once(&onceToken, ^{
- type_id = _CFRuntimeRegisterClass(&_auth_type_engine);
- });
-
- return type_id;
-}
-
-engine_t
-engine_create(connection_t conn, auth_token_t auth)
-{
- engine_t engine = NULL;
- require(conn != NULL, done);
- require(auth != NULL, done);
-
- engine = (engine_t)_CFRuntimeCreateInstance(kCFAllocatorDefault, engine_get_type_id(), AUTH_CLASS_SIZE(engine), NULL);
- require(engine != NULL, done);
-
- engine->conn = (connection_t)CFRetain(conn);
- engine->proc = connection_get_process(conn);
- engine->auth = (auth_token_t)CFRetain(auth);
-
- engine->hints = auth_items_create();
- engine->context = auth_items_create();
- engine->immutable_hints = auth_items_create();
- engine->sticky_context = auth_items_create();
- _set_process_hints(engine->hints, engine->proc);
- _set_process_immutable_hints(engine->immutable_hints, engine->proc);
- _set_auth_token_hints(engine->hints, auth);
-
- engine->grantedRights = auth_rights_create();
-
- engine->reason = noReason;
-
- engine->now = CFAbsoluteTimeGetCurrent();
-
- session_update(auth_token_get_session(engine->auth));
- engine->sessionCredential = credential_create(session_get_uid(auth_token_get_session(engine->auth)));
- engine->credentials = CFSetCreateMutable(kCFAllocatorDefault, 0, &kCFTypeSetCallBacks);
- engine->effectiveCredentials = CFSetCreateMutable(kCFAllocatorDefault, 0, &kCFTypeSetCallBacks);
-
- session_credentials_iterate(auth_token_get_session(engine->auth), ^bool(credential_t cred) {
- CFSetAddValue(engine->effectiveCredentials, cred);
- return true;
- });
-
- auth_token_credentials_iterate(engine->auth, ^bool(credential_t cred) {
- // we added all session credentials already now just add all previously acquired credentials
- if (!credential_get_shared(cred)) {
- CFSetAddValue(engine->credentials, cred);
- }
- return true;
- });
-
- engine->mechanism_agents = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
-
-done:
- return engine;
-}
-
-#pragma mark -
-#pragma mark agent hints
-
-void
-_set_process_hints(auth_items_t hints, process_t proc)
-{
- // process information
- RequestorType type = bundle;
- auth_items_set_data(hints, AGENT_HINT_CLIENT_TYPE, &type, sizeof(type));
- auth_items_set_int(hints, AGENT_HINT_CLIENT_PID, process_get_pid(proc));
- auth_items_set_uint(hints, AGENT_HINT_CLIENT_UID, process_get_uid(proc));
-}
-
-void
-_set_process_immutable_hints(auth_items_t immutable_hints, process_t proc)
-{
- // process information - immutable
- auth_items_set_bool(immutable_hints, AGENT_HINT_PROCESS_SIGNED, process_apple_signed(proc));
-}
-
-void
-_set_auth_token_hints(auth_items_t hints, auth_token_t auth)
-{
- auth_items_set_string(hints, AGENT_HINT_CLIENT_PATH, auth_token_get_code_url(auth));
- auth_items_set_int(hints, AGENT_HINT_CREATOR_PID, auth_token_get_pid(auth));
- const audit_info_s * info = auth_token_get_audit_info(auth);
- auth_items_set_data(hints, AGENT_HINT_CREATOR_AUDIT_TOKEN, &info->opaqueToken, sizeof(info->opaqueToken));
-}
-
-static void
-_set_right_hints(auth_items_t hints, const char * right)
-{
- auth_items_set_string(hints, AGENT_HINT_AUTHORIZE_RIGHT, right);
-}
-
-static void
-_set_rule_hints(auth_items_t hints, rule_t rule)
-{
- auth_items_set_string(hints, AGENT_HINT_AUTHORIZE_RULE, rule_get_name(rule));
- const char * group = rule_get_group(rule);
- if (rule_get_class(rule) == RC_USER && group != NULL) {
- auth_items_set_string(hints, AGENT_HINT_REQUIRE_USER_IN_GROUP, group);
- } else {
- auth_items_remove(hints, AGENT_HINT_REQUIRE_USER_IN_GROUP);
- }
-}
-
-static void
-_set_localization_hints(authdb_connection_t dbconn, auth_items_t hints, rule_t rule)
-{
- char * key = calloc(1u, 128);
-
- authdb_step(dbconn, "SELECT lang,value FROM prompts WHERE r_id = ?", ^(sqlite3_stmt *stmt) {
- sqlite3_bind_int64(stmt, 1, rule_get_id(rule));
- }, ^bool(auth_items_t data) {
- snprintf(key, 128, "%s%s", kAuthorizationRuleParameterDescription, auth_items_get_string(data, "lang"));
- auth_items_set_string(hints, key, auth_items_get_string(data, "value"));
- auth_items_set_flags(hints, key, kEngineHintsFlagTemporary);
- return true;
- });
-
- authdb_step(dbconn, "SELECT lang,value FROM buttons WHERE r_id = ?", ^(sqlite3_stmt *stmt) {
- sqlite3_bind_int64(stmt, 1, rule_get_id(rule));
- }, ^bool(auth_items_t data) {
- snprintf(key, 128, "%s%s", kAuthorizationRuleParameterButton, auth_items_get_string(data, "lang"));
- auth_items_set_string(hints, key, auth_items_get_string(data, "value"));
- auth_items_set_flags(hints, key, kEngineHintsFlagTemporary);
- return true;
- });
-
- free_safe(key);
-}
-
-static void
-_set_session_hints(engine_t engine, rule_t rule)
-{
- LOGV("engine[%i]: ** prepare agent hints for rule %s", connection_get_pid(engine->conn), rule_get_name(rule));
- if (_evaluate_user_credential_for_rule(engine, engine->sessionCredential, rule, true, true, NULL) == errAuthorizationSuccess) {
- const char * tmp = credential_get_name(engine->sessionCredential);
- if (tmp != NULL) {
- auth_items_set_string(engine->hints, AGENT_HINT_SUGGESTED_USER, tmp);
- }
- tmp = credential_get_realname(engine->sessionCredential);
- if (tmp != NULL) {
- auth_items_set_string(engine->hints, AGENT_HINT_SUGGESTED_USER_LONG, tmp);
- }
- } else {
- auth_items_remove(engine->hints, AGENT_HINT_SUGGESTED_USER);
- auth_items_remove(engine->hints, AGENT_HINT_SUGGESTED_USER_LONG);
- }
-}
-
-#pragma mark -
-#pragma mark right processing
-
-static OSStatus
-_evaluate_credential_for_rule(engine_t engine, credential_t cred, rule_t rule, bool ignoreShared, bool sessionOwner, enum Reason * reason)
-{
- if (auth_token_least_privileged(engine->auth)) {
- if (credential_is_right(cred) && credential_get_valid(cred) && _compare_string(engine->currentRightName, credential_get_name(cred))) {
- if (!ignoreShared) {
- if (!rule_get_shared(rule) && credential_get_shared(cred)) {
- LOGV("engine[%i]: - shared right %s (does NOT satisfy rule)", connection_get_pid(engine->conn), credential_get_name(cred));
- if (reason) { *reason = unknownReason; }
- return errAuthorizationDenied;
- }
- }
-
- return errAuthorizationSuccess;
- } else {
- if (reason) { *reason = unknownReason; }
- return errAuthorizationDenied;
- }
- } else {
- return _evaluate_user_credential_for_rule(engine,cred,rule,ignoreShared,sessionOwner, reason);
- }
-}
-
-static OSStatus
-_evaluate_user_credential_for_rule(engine_t engine, credential_t cred, rule_t rule, bool ignoreShared, bool sessionOwner, enum Reason * reason)
-{
- const char * cred_label = sessionOwner ? "session owner" : "credential";
- LOGV("engine[%i]: - validating %s%s %s (%i) for %s", connection_get_pid(engine->conn),
- credential_get_shared(cred) ? "shared " : "",
- cred_label,
- credential_get_name(cred),
- credential_get_uid(cred),
- rule_get_name(rule));
-
- if (rule_get_class(rule) != RC_USER) {
- LOGV("engine[%i]: - invalid rule class %i (denied)", connection_get_pid(engine->conn), rule_get_class(rule));
- return errAuthorizationDenied;
- }
-
- if (credential_get_valid(cred) != true) {
- LOGV("engine[%i]: - %s %i invalid (does NOT satisfy rule)", connection_get_pid(engine->conn), cred_label, credential_get_uid(cred));
- if (reason) { *reason = invalidPassphrase; }
- return errAuthorizationDenied;
- }
-
- if (engine->now - credential_get_creation_time(cred) > rule_get_timeout(rule)) {
- LOGV("engine[%i]: - %s %i expired '%f > %lli' (does NOT satisfy rule)", connection_get_pid(engine->conn), cred_label, credential_get_uid(cred),
- (engine->now - credential_get_creation_time(cred)), rule_get_timeout(rule));
- if (reason) { *reason = unknownReason; }
- return errAuthorizationDenied;
- }
-
-
- if (!ignoreShared) {
- if (!rule_get_shared(rule) && credential_get_shared(cred)) {
- LOGV("engine[%i]: - shared %s %i (does NOT satisfy rule)", connection_get_pid(engine->conn), cred_label, credential_get_uid(cred));
- if (reason) { *reason = unknownReason; }
- return errAuthorizationDenied;
- }
- }
-
- if (credential_get_uid(cred) == 0) {
- LOGV("engine[%i]: - %s %i has uid 0 (does satisfy rule)", connection_get_pid(engine->conn), cred_label, credential_get_uid(cred));
- return errAuthorizationSuccess;
- }
-
- if (rule_get_session_owner(rule)) {
- if (credential_get_uid(cred) == session_get_uid(auth_token_get_session(engine->auth))) {
- LOGV("engine[%i]: - %s %i is session owner (does satisfy rule)", connection_get_pid(engine->conn), cred_label, credential_get_uid(cred));
- return errAuthorizationSuccess;
- }
- }
-
- if (rule_get_group(rule) != NULL) {
- do
- {
- // This allows testing a group modifier without prompting the user
- // When (authenticate-user = false) we are just testing the creator uid.
- // If a group modifier is enabled (RuleFlagEntitledAndGroup | RuleFlagVPNEntitledAndGroup)
- // we want to skip the creator uid group check.
- // group modifiers are checked early during the evaluation in _check_entitlement_for_rule
- if (!rule_get_authenticate_user(rule)) {
- if (rule_check_flags(rule, RuleFlagEntitledAndGroup | RuleFlagVPNEntitledAndGroup)) {
- break;
- }
- }
-
- if (credential_check_membership(cred, rule_get_group(rule))) {
- LOGV("engine[%i]: - %s %i is member of group %s (does satisfy rule)", connection_get_pid(engine->conn), cred_label, credential_get_uid(cred), rule_get_group(rule));
- return errAuthorizationSuccess;
- } else {
- if (reason) { *reason = userNotInGroup; }
- }
- } while (0);
- } else if (rule_get_session_owner(rule)) { // rule asks only if user is the session owner
- if (reason) { *reason = unacceptableUser; }
- }
-
- LOGV("engine[%i]: - %s %i (does NOT satisfy rule)", connection_get_pid(engine->conn), cred_label, credential_get_uid(cred));
- return errAuthorizationDenied;
-}
-
-static agent_t
-_get_agent(engine_t engine, mechanism_t mech, bool create, bool firstMech)
-{
- agent_t agent = (agent_t)CFDictionaryGetValue(engine->mechanism_agents, mech);
- if (create && !agent) {
- agent = agent_create(engine, mech, engine->auth, engine->proc, firstMech);
- if (agent) {
- CFDictionaryAddValue(engine->mechanism_agents, mech, agent);
- CFReleaseSafe(agent);
- }
- }
- return agent;
-}
-
-static uint64_t
-_evaluate_builtin_mechanism(engine_t engine, mechanism_t mech)
-{
- uint64_t result = kAuthorizationResultDeny;
-
- switch (mechanism_get_type(mech)) {
- case kMechanismTypeEntitled:
- if (auth_token_has_entitlement_for_right(engine->auth, engine->currentRightName)) {
- result = kAuthorizationResultAllow;
- }
- break;
- default:
- break;
- }
-
- return result;
-}
-
-
-static OSStatus
-_evaluate_mechanisms(engine_t engine, CFArrayRef mechanisms)
-{
- uint64_t result = kAuthorizationResultAllow;
- ccaudit_t ccaudit = ccaudit_create(engine->proc, engine->auth, AUE_ssauthmech);
- auth_items_t context = auth_items_create();
- auth_items_t hints = auth_items_create();
-
- auth_items_copy(context, engine->context);
- auth_items_copy(hints, engine->hints);
- auth_items_copy(context, engine->sticky_context);
-
- CFIndex count = CFArrayGetCount(mechanisms);
- for (CFIndex i = 0; i < count; i++) {
- mechanism_t mech = (mechanism_t)CFArrayGetValueAtIndex(mechanisms, i);
-
- if (mechanism_get_type(mech)) {
- LOGV("engine[%i]: running builtin mechanism %s (%li of %li)", connection_get_pid(engine->conn), mechanism_get_string(mech), i+1, count);
- result = _evaluate_builtin_mechanism(engine, mech);
- } else {
- agent_t agent = _get_agent(engine, mech, true, i == 0);
- require_action(agent != NULL, done, result = kAuthorizationResultUndefined; LOGE("engine[%i]: error creating mechanism agent", connection_get_pid(engine->conn)));
-
- // check if any agent has been interrupted (it necessary if interrupt will come during creation)
- CFIndex j;
- agent_t agent1;
- for (j = 0; j < i; j++) {
- agent1 = _get_agent(engine, (mechanism_t)CFArrayGetValueAtIndex(mechanisms, j), false, j == 0);
- if(agent_get_state(agent1) == interrupting) {
- break;
- }
- }
- if (j < i) {
- LOGV("engine[%i]: mechanisms interrupted", connection_get_pid(engine->conn));
- char * buf = NULL;
- asprintf(&buf, "evaluation interrupted by %s; restarting evaluation there", mechanism_get_string(agent_get_mechanism(agent1)));
- ccaudit_log_mechanism(ccaudit, engine->currentRightName, mechanism_get_string(agent_get_mechanism(agent1)), kAuthorizationResultAllow, buf);
- free_safe(buf);
- ccaudit_log_mechanism(ccaudit, engine->currentRightName, mechanism_get_string(mech), kAuthorizationResultAllow, NULL);
- const char * token_name = auth_items_get_string(hints, AGENT_HINT_TOKEN_NAME);
- if (token_name && strlen(token_name) == 0) {
- auth_items_remove(hints, AGENT_HINT_TOKEN_NAME);
- }
- auth_items_copy(context, agent_get_context(agent1));
- auth_items_copy(hints, agent_get_hints(agent1));
-
- i = j - 1;
-
- continue;
- }
-
- LOGV("engine[%i]: running mechanism %s (%li of %li)", connection_get_pid(engine->conn), mechanism_get_string(agent_get_mechanism(agent)), i+1, count);
- result = agent_run(agent, hints, context, engine->immutable_hints);
-
- auth_items_copy(context, agent_get_context(agent));
- auth_items_copy(hints, agent_get_hints(agent));
-
- bool interrupted = false;
- for (CFIndex i2 = 0; i2 != i; i2++) {
- agent_t agent2 = _get_agent(engine, (mechanism_t)CFArrayGetValueAtIndex(mechanisms, i2), false, i == 0);
- if (agent_get_state(agent2) == interrupting) {
- agent_deactivate(agent);
- interrupted = true;
- i = i2 - 1;
- char * buf = NULL;
- asprintf(&buf, "evaluation interrupted by %s; restarting evaluation there", mechanism_get_string(agent_get_mechanism(agent2)));
- ccaudit_log_mechanism(ccaudit, engine->currentRightName, mechanism_get_string(agent_get_mechanism(agent2)), kAuthorizationResultAllow, buf);
- free_safe(buf);
- auth_items_copy(context, agent_get_context(agent2));
- auth_items_copy(hints, agent_get_hints(agent2));
- break;
- }
- }
-
- // Empty token name means that token doesn't exist (e.g. SC was removed).
- // Remove empty token name from hints for UI drawing logic.
- const char * token_name = auth_items_get_string(hints, AGENT_HINT_TOKEN_NAME);
- if (token_name && strlen(token_name) == 0) {
- auth_items_remove(hints, AGENT_HINT_TOKEN_NAME);
- }
-
- if (interrupted) {
- LOGV("engine[%i]: mechanisms interrupted", connection_get_pid(engine->conn));
- enum Reason reason = worldChanged;
- auth_items_set_data(hints, AGENT_HINT_RETRY_REASON, &reason, sizeof(reason));
- result = kAuthorizationResultAllow;
- _cf_dictionary_iterate(engine->mechanism_agents, ^bool(CFTypeRef key __attribute__((__unused__)), CFTypeRef value) {
- agent_t tempagent = (agent_t)value;
- agent_clear_interrupt(tempagent);
- return true;
- });
- }
- }
-
- if (result == kAuthorizationResultAllow) {
- ccaudit_log_mechanism(ccaudit, engine->currentRightName, mechanism_get_string(mech), kAuthorizationResultAllow, NULL);
- } else {
- ccaudit_log_mechanism(ccaudit, engine->currentRightName, mechanism_get_string(mech), (uint32_t)result, NULL);
- break;
- }
- }
-
-done:
- if ((result == kAuthorizationResultUserCanceled) || (result == kAuthorizationResultAllow)) {
- // only make non-sticky context values available externally
- auth_items_set_flags(context, kAuthorizationEnvironmentPassword, kAuthorizationContextFlagVolatile);
- // <rdar://problem/16275827> Takauthorizationenvironmentusername should always be extractable
- auth_items_set_flags(context, kAuthorizationEnvironmentUsername, kAuthorizationContextFlagExtractable);
- auth_items_copy_with_flags(engine->context, context, kAuthorizationContextFlagExtractable | kAuthorizationContextFlagVolatile);
- } else if (result == kAuthorizationResultDeny) {
- auth_items_clear(engine->sticky_context);
- // save off sticky values in context
- auth_items_copy_with_flags(engine->sticky_context, context, kAuthorizationContextFlagSticky);
- }
-
- CFReleaseSafe(ccaudit);
- CFReleaseSafe(context);
- CFReleaseSafe(hints);
-
- switch(result)
- {
- case kAuthorizationResultDeny:
- return errAuthorizationDenied;
- case kAuthorizationResultUserCanceled:
- return errAuthorizationCanceled;
- case kAuthorizationResultAllow:
- return errAuthorizationSuccess;
- case kAuthorizationResultUndefined:
- return errAuthorizationInternal;
- default:
- {
- LOGV("engine[%i]: unexpected error result", connection_get_pid(engine->conn));
- return errAuthorizationInternal;
- }
- }
-}
-
-static OSStatus
-_evaluate_authentication(engine_t engine, rule_t rule)
-{
- OSStatus status = errAuthorizationDenied;
- ccaudit_t ccaudit = ccaudit_create(engine->proc, engine->auth, AUE_ssauthint);
- LOGV("engine[%i]: evaluate authentication", connection_get_pid(engine->conn));
- _set_rule_hints(engine->hints, rule);
- _set_session_hints(engine, rule);
-
- CFArrayRef mechanisms = rule_get_mechanisms(rule);
- if (!(CFArrayGetCount(mechanisms) > 0)) {
- mechanisms = rule_get_mechanisms(engine->authenticateRule);
- }
- require_action(CFArrayGetCount(mechanisms) > 0, done, LOGV("engine[%i]: error no mechanisms found", connection_get_pid(engine->conn)));
-
- int64_t ruleTries = rule_get_tries(rule);
- for (engine->tries = 0; engine->tries < ruleTries; engine->tries++) {
-
- auth_items_set_data(engine->hints, AGENT_HINT_RETRY_REASON, &engine->reason, sizeof(engine->reason));
- auth_items_set_int(engine->hints, AGENT_HINT_TRIES, engine->tries);
-
- status = _evaluate_mechanisms(engine, mechanisms);
-
- LOGV("engine[%i]: evaluate mechanisms result %i", connection_get_pid(engine->conn), status);
-
- // successfully ran mechanisms to obtain credential
- if (status == errAuthorizationSuccess) {
- // deny is the default
- status = errAuthorizationDenied;
-
- credential_t newCred = NULL;
- if (auth_items_exist(engine->context, "uid")) {
- newCred = credential_create(auth_items_get_uint(engine->context, "uid"));
- } else {
- LOGV("engine[%i]: mechanism failed to return a valid uid", connection_get_pid(engine->conn));
- }
-
- if (newCred) {
- if (credential_get_valid(newCred)) {
- LOG("UID %u authenticated as user %s (UID %u) for right '%s'", auth_token_get_uid(engine->auth), credential_get_name(newCred), credential_get_uid(newCred), engine->currentRightName);
- ccaudit_log_success(ccaudit, newCred, engine->currentRightName);
- } else {
- LOG("UID %u failed to authenticate as user '%s' for right '%s'", auth_token_get_uid(engine->auth), auth_items_get_string(engine->context, "username"), engine->currentRightName);
- ccaudit_log_failure(ccaudit, auth_items_get_string(engine->context, "username"), engine->currentRightName);
- }
-
- status = _evaluate_user_credential_for_rule(engine, newCred, rule, true, false, &engine->reason);
-
- if (status == errAuthorizationSuccess) {
- _engine_set_credential(engine, newCred, rule_get_shared(rule));
- CFReleaseSafe(newCred);
-
- if (auth_token_least_privileged(engine->auth)) {
- credential_t rightCred = credential_create_with_right(engine->currentRightName);
- _engine_set_credential(engine, rightCred, rule_get_shared(rule));
- CFReleaseSafe(rightCred);
- }
-
- session_t session = auth_token_get_session(engine->auth);
- if (credential_get_uid(newCred) == session_get_uid(session)) {
- LOGV("engine[%i]: authenticated as the session owner", connection_get_pid(engine->conn));
- session_set_attributes(auth_token_get_session(engine->auth), AU_SESSION_FLAG_HAS_AUTHENTICATED);
- }
-
- break;
- }
-
- CFReleaseSafe(newCred);
- }
-
- } else if (status == errAuthorizationCanceled || status == errAuthorizationInternal) {
- break;
- } else if (status == errAuthorizationDenied) {
- engine->reason = invalidPassphrase;
- }
- }
-
- if (engine->tries == ruleTries) {
- engine->reason = tooManyTries;
- auth_items_set_data(engine->hints, AGENT_HINT_RETRY_REASON, &engine->reason, sizeof(engine->reason));
- auth_items_set_int(engine->hints, AGENT_HINT_TRIES, engine->tries);
- _evaluate_mechanisms(engine, mechanisms);
- ccaudit_log(ccaudit, engine->currentRightName, NULL, 1113);
- }
-
-done:
- CFReleaseSafe(ccaudit);
-
- return status;
-}
-
-static bool
-_check_entitlement_for_rule(engine_t engine, rule_t rule)
-{
- bool entitled = false;
- CFTypeRef value = NULL;
-
- if (rule_check_flags(rule, RuleFlagEntitledAndGroup)) {
- if (auth_token_has_entitlement_for_right(engine->auth, engine->currentRightName)) {
- if (credential_check_membership(auth_token_get_credential(engine->auth), rule_get_group(rule))) {
- LOGV("engine[%i]: creator of authorization has entitlement for right %s and is member of group '%s'", connection_get_pid(engine->conn), engine->currentRightName, rule_get_group(rule));
- entitled = true;
- goto done;
- }
- }
- }
-
- if (rule_check_flags(rule, RuleFlagVPNEntitledAndGroup)) {
- // com.apple.networking.vpn.configuration is an array we only check for it's existence
- value = auth_token_copy_entitlement_value(engine->auth, "com.apple.networking.vpn.configuration");
- if (value) {
- if (credential_check_membership(auth_token_get_credential(engine->auth), rule_get_group(rule))) {
- LOGV("engine[%i]: creator of authorization has VPN entitlement and is member of group '%s'", connection_get_pid(engine->conn), rule_get_group(rule));
- entitled = true;
- goto done;
- }
- }
- }
-
-done:
- CFReleaseSafe(value);
- return entitled;
-}
-
-static OSStatus
-_evaluate_class_user(engine_t engine, rule_t rule)
-{
- __block OSStatus status = errAuthorizationDenied;
-
- if (_check_entitlement_for_rule(engine,rule)) {
- return errAuthorizationSuccess;
- }
-
- if (rule_get_allow_root(rule) && auth_token_get_uid(engine->auth) == 0) {
- LOGV("engine[%i]: creator of authorization has uid == 0 granting right %s", connection_get_pid(engine->conn), engine->currentRightName);
- return errAuthorizationSuccess;
- }
-
- if (!rule_get_authenticate_user(rule)) {
- status = _evaluate_user_credential_for_rule(engine, engine->sessionCredential, rule, true, true, NULL);
-
- if (status == errAuthorizationSuccess) {
- return errAuthorizationSuccess;
- }
-
- return errAuthorizationDenied;
- }
-
- // First -- check all the credentials we have either acquired or currently have
- _cf_set_iterate(engine->credentials, ^bool(CFTypeRef value) {
- credential_t cred = (credential_t)value;
- // Passed-in user credentials are allowed for least-privileged mode
- if (auth_token_least_privileged(engine->auth) && !credential_is_right(cred) && credential_get_valid(cred)) {
- status = _evaluate_user_credential_for_rule(engine, cred, rule, false, false, NULL);
- if (errAuthorizationSuccess == status) {
- credential_t rightCred = credential_create_with_right(engine->currentRightName);
- _engine_set_credential(engine,rightCred,rule_get_shared(rule));
- CFReleaseSafe(rightCred);
- return false; // exit loop
- }
- }
-
- status = _evaluate_credential_for_rule(engine, cred, rule, false, false, NULL);
- if (status == errAuthorizationSuccess) {
- return false; // exit loop
- }
- return true;
- });
-
- if (status == errAuthorizationSuccess) {
- return status;
- }
-
- // Second -- go through the credentials associated to the authorization token session/auth token
- _cf_set_iterate(engine->effectiveCredentials, ^bool(CFTypeRef value) {
- credential_t cred = (credential_t)value;
- status = _evaluate_credential_for_rule(engine, cred, rule, false, false, NULL);
- if (status == errAuthorizationSuccess) {
- // Add the credential we used to the output set.
- _engine_set_credential(engine, cred, false);
- return false; // exit loop
- }
- return true;
- });
-
- if (status == errAuthorizationSuccess) {
- return status;
- }
-
- // Finally - we didn't find a credential. Obtain a new credential if our flags let us do so.
- if (!(engine->flags & kAuthorizationFlagExtendRights)) {
- LOGV("engine[%i]: authorization denied (kAuthorizationFlagExtendRights not set)", connection_get_pid(engine->conn));
- return errAuthorizationDenied;
- }
-
- // authorization that timeout immediately cannot be preauthorized
- if (engine->flags & kAuthorizationFlagPreAuthorize && rule_get_timeout(rule) == 0) {
- return errAuthorizationSuccess;
- }
-
- if (!(engine->flags & kAuthorizationFlagInteractionAllowed)) {
- LOGV("engine[%i]: Interaction not allowed (kAuthorizationFlagInteractionAllowed not set)", connection_get_pid(engine->conn));
- return errAuthorizationInteractionNotAllowed;
- }
-
- if (!(session_get_attributes(auth_token_get_session(engine->auth)) & AU_SESSION_FLAG_HAS_GRAPHIC_ACCESS)) {
- LOGV("engine[%i]: Interaction not allowed (session has no ui access)", connection_get_pid(engine->conn));
- return errAuthorizationInteractionNotAllowed;
- }
-
- if (server_in_dark_wake()) {
- LOGV("engine[%i]: authorization denied (in DarkWake)", connection_get_pid(engine->conn));
- return errAuthorizationDenied;
- }
-
- return _evaluate_authentication(engine, rule);
-}
-
-static OSStatus
-_evaluate_class_rule(engine_t engine, rule_t rule, bool *save_pwd)
-{
- __block OSStatus status = errAuthorizationDenied;
- int64_t kofn = rule_get_kofn(rule);
-
- uint32_t total = (uint32_t)rule_get_delegates_count(rule);
- __block uint32_t success_count = 0;
- __block uint32_t count = 0;
- LOGV("engine[%i]: ** rule %s has %zi delegates kofn = %lli", connection_get_pid(engine->conn), rule_get_name(rule), total, kofn);
- rule_delegates_iterator(rule, ^bool(rule_t delegate) {
- count++;
-
- if (kofn != 0 && success_count == kofn) {
- status = errAuthorizationSuccess;
- return false;
- }
-
- LOGV("engine[%i]: * evaluate rule %s (%i)", connection_get_pid(engine->conn), rule_get_name(delegate), count);
- status = _evaluate_rule(engine, delegate, save_pwd);
-
- // if status is cancel/internal error abort
- if ((status == errAuthorizationCanceled) || (status == errAuthorizationInternal))
- return false;
-
- if (status != errAuthorizationSuccess) {
- if (kofn != 0) {
- // if remaining is less than required abort
- if ((total - count) < (kofn - success_count)) {
- LOGD("engine[%i]: rule evaluation remaining: %i, required: %lli", connection_get_pid(engine->conn), (total - count), (kofn - success_count));
- return false;
- }
- return true;
- }
- return false;
- } else {
- success_count++;
- return true;
- }
- });
-
- return status;
-}
-
-static OSStatus
-_evaluate_class_mechanism(engine_t engine, rule_t rule)
-{
- OSStatus status = errAuthorizationDenied;
- CFArrayRef mechanisms = NULL;
-
- require_action(rule_get_mechanisms_count(rule) > 0, done, status = errAuthorizationSuccess; LOGV("engine[%i]: no mechanisms specified", connection_get_pid(engine->conn)));
-
- mechanisms = rule_get_mechanisms(rule);
-
- if (server_in_dark_wake()) {
- CFIndex count = CFArrayGetCount(mechanisms);
- for (CFIndex i = 0; i < count; i++) {
- if (!mechanism_is_privileged((mechanism_t)CFArrayGetValueAtIndex(mechanisms, i))) {
- LOGV("engine[%i]: authorization denied (in DarkWake)", connection_get_pid(engine->conn));
- goto done;
- }
- }
- }
-
- int64_t ruleTries = rule_get_tries(rule);
- engine->tries = 0;
- do {
- auth_items_set_data(engine->hints, AGENT_HINT_RETRY_REASON, &engine->reason, sizeof(engine->reason));
- auth_items_set_int(engine->hints, AGENT_HINT_TRIES, engine->tries);
-
- status = _evaluate_mechanisms(engine, mechanisms);
- LOGV("engine[%i]: evaluate mechanisms result %i", connection_get_pid(engine->conn), status);
-
- if (status == errAuthorizationSuccess) {
- credential_t newCred = NULL;
- if (auth_items_exist(engine->context, "uid")) {
- newCred = credential_create(auth_items_get_uint(engine->context, "uid"));
- } else {
- LOGV("engine[%i]: mechanism did not return a uid", connection_get_pid(engine->conn));
- }
-
- if (newCred) {
- _engine_set_credential(engine, newCred, rule_get_shared(rule));
-
- if (auth_token_least_privileged(engine->auth)) {
- credential_t rightCred = credential_create_with_right(engine->currentRightName);
- _engine_set_credential(engine, rightCred, rule_get_shared(rule));
- CFReleaseSafe(rightCred);
- }
-
- if (strcmp(engine->currentRightName, "system.login.console") == 0 && !auth_items_exist(engine->context, AGENT_CONTEXT_AUTO_LOGIN)) {
- session_set_attributes(auth_token_get_session(engine->auth), AU_SESSION_FLAG_HAS_AUTHENTICATED);
- }
-
- CFReleaseSafe(newCred);
- }
- }
-
- engine->tries++;
-
- } while ( (status == errAuthorizationDenied) // only if we have an expected faulure we continue
- && ((ruleTries == 0) || ((ruleTries > 0) && engine->tries < ruleTries))); // ruleTries == 0 means we try forever
- // ruleTires > 0 means we try upto ruleTries times
-done:
- return status;
-}
-
-static OSStatus
-_evaluate_rule(engine_t engine, rule_t rule, bool *save_pwd)
-{
- if (rule_check_flags(rule, RuleFlagEntitled)) {
- if (auth_token_has_entitlement_for_right(engine->auth, engine->currentRightName)) {
- LOGV("engine[%i]: rule allow, creator of authorization has entitlement for right %s", connection_get_pid(engine->conn), engine->currentRightName);
- return errAuthorizationSuccess;
- }
- }
-
- if (rule_check_flags(rule, RuleFlagRequireAppleSigned)) {
- if (!auth_token_apple_signed(engine->auth)) {
- LOGV("engine[%i]: rule deny, creator of authorization is not signed by apple", connection_get_pid(engine->conn));
- return errAuthorizationDenied;
- }
- }
-
- *save_pwd |= rule_get_extract_password(rule);
-
- switch (rule_get_class(rule)) {
- case RC_ALLOW:
- LOGV("engine[%i]: rule set to allow", connection_get_pid(engine->conn));
- return errAuthorizationSuccess;
- case RC_DENY:
- LOGV("engine[%i]: rule set to deny", connection_get_pid(engine->conn));
- return errAuthorizationDenied;
- case RC_USER:
- return _evaluate_class_user(engine, rule);
- case RC_RULE:
- return _evaluate_class_rule(engine, rule, save_pwd);
- case RC_MECHANISM:
- return _evaluate_class_mechanism(engine, rule);
- default:
- LOGV("engine[%i]: invalid class for rule or rule not found", connection_get_pid(engine->conn));
- return errAuthorizationInternal;
- }
-}
-
-static rule_t
-_find_rule(engine_t engine, authdb_connection_t dbconn, const char * string)
-{
- rule_t r = NULL;
- size_t sLen = strlen(string);
-
- char * buf = calloc(1u, sLen + 1);
- strlcpy(buf, string, sLen + 1);
- char * ptr = buf + sLen;
- __block int64_t count = 0;
-
- for (;;) {
-
- // lookup rule
- authdb_step(dbconn, "SELECT COUNT(name) AS cnt FROM rules WHERE name = ? AND type = 1",
- ^(sqlite3_stmt *stmt) {
- sqlite3_bind_text(stmt, 1, buf, -1, NULL);
- }, ^bool(auth_items_t data) {
- count = auth_items_get_int64(data, "cnt");
- return false;
- });
-
- if (count > 0) {
- r = rule_create_with_string(buf, dbconn);
- goto done;
- }
-
- // if buf ends with a . and we didn't find a rule remove .
- if (*ptr == '.') {
- *ptr = '\0';
- }
- // find any remaining . and truncate the string
- ptr = strrchr(buf, '.');
- if (ptr) {
- *(ptr+1) = '\0';
- } else {
- break;
- }
- }
-
-done:
- free_safe(buf);
-
- // set default if we didn't find a rule
- if (r == NULL) {
- r = rule_create_with_string("", dbconn);
- if (rule_get_id(r) == 0) {
- CFReleaseNull(r);
- LOGE("engine[%i]: default rule lookup error (missing), using builtin defaults", connection_get_pid(engine->conn));
- r = rule_create_default();
- }
- }
- return r;
-}
-
-static void _parse_enviroment(engine_t engine, auth_items_t enviroment)
-{
- require(enviroment != NULL, done);
-
-#if DEBUG
- LOGV("engine[%i]: Dumping Enviroment", connection_get_pid(engine->conn));
- _show_cf(enviroment);
-#endif
-
- // Check if a credential was passed into the environment and we were asked to extend the rights
- if (engine->flags & kAuthorizationFlagExtendRights) {
- const char * user = auth_items_get_string(enviroment, kAuthorizationEnvironmentUsername);
- const char * pass = auth_items_get_string(enviroment, kAuthorizationEnvironmentPassword);
- bool shared = auth_items_exist(enviroment, kAuthorizationEnvironmentShared);
- require(user != NULL, done);
-
- struct passwd *pw = getpwnam(user);
- require_action(pw != NULL, done, LOGE("engine[%i]: user not found %s", connection_get_pid(engine->conn), user));
-
- int checkpw_status = checkpw_internal(pw, pass ? pass : "");
- require_action(checkpw_status == CHECKPW_SUCCESS, done, LOGE("engine[%i]: checkpw() returned %d; failed to authenticate user %s (uid %u).", connection_get_pid(engine->conn), checkpw_status, pw->pw_name, pw->pw_uid));
-
- credential_t cred = credential_create(pw->pw_uid);
- if (credential_get_valid(cred)) {
- LOG("engine[%i]: checkpw() succeeded, creating credential for user %s", connection_get_pid(engine->conn), user);
- _engine_set_credential(engine, cred, shared);
-
- auth_items_set_string(engine->context, kAuthorizationEnvironmentUsername, user);
- auth_items_set_string(engine->context, kAuthorizationEnvironmentPassword, pass ? pass : "");
- }
- CFReleaseSafe(cred);
- }
-
-done:
- endpwent();
- return;
-}
-
-static bool _verify_sandbox(engine_t engine, const char * right)
-{
- pid_t pid = process_get_pid(engine->proc);
- if (sandbox_check(pid, "authorization-right-obtain", SANDBOX_FILTER_RIGHT_NAME, right)) {
- LOGE("Sandbox denied authorizing right '%s' by client '%s' [%d]", right, process_get_code_url(engine->proc), pid);
- return false;
- }
-
- pid = auth_token_get_pid(engine->auth);
- if (auth_token_get_sandboxed(engine->auth) && sandbox_check(pid, "authorization-right-obtain", SANDBOX_FILTER_RIGHT_NAME, right)) {
- LOGE("Sandbox denied authorizing right '%s' for authorization created by '%s' [%d]", right, auth_token_get_code_url(engine->auth), pid);
- return false;
- }
-
- return true;
-}
-
-#pragma mark -
-#pragma mark engine methods
-
-OSStatus engine_authorize(engine_t engine, auth_rights_t rights, auth_items_t enviroment, AuthorizationFlags flags)
-{
- __block OSStatus status = errAuthorizationSuccess;
- __block bool savePassword = false;
- ccaudit_t ccaudit = NULL;
-
- require(rights != NULL, done);
-
- ccaudit = ccaudit_create(engine->proc, engine->auth, AUE_ssauthorize);
- if (auth_rights_get_count(rights) > 0) {
- ccaudit_log(ccaudit, "begin evaluation", NULL, 0);
- }
-
- engine->flags = flags;
-
- if (enviroment) {
- _parse_enviroment(engine, enviroment);
- auth_items_copy(engine->hints, enviroment);
- }
-
- auth_items_copy(engine->context, auth_token_get_context(engine->auth));
-
- engine->dismissed = false;
- auth_rights_clear(engine->grantedRights);
-
- auth_rights_iterate(rights, ^bool(const char *key) {
- if (!key)
- return true;
-
-
- if (!_verify_sandbox(engine, key)) {
- status = errAuthorizationDenied;
- return false;
- }
-
- authdb_connection_t dbconn = authdb_connection_acquire(server_get_database()); // get db handle
-
- LOGV("engine[%i]: evaluate right %s", connection_get_pid(engine->conn), key);
- rule_t rule = _find_rule(engine, dbconn, key);
- const char * rule_name = rule_get_name(rule);
- if (rule_name && (strcasecmp(rule_name, "") == 0)) {
- rule_name = "default (not defined)";
- }
- LOGV("engine[%i]: using rule %s", connection_get_pid(engine->conn), rule_name);
-
- // only need the hints & mechanisms if we are going to show ui
- if (engine->flags & kAuthorizationFlagInteractionAllowed) {
- _set_right_hints(engine->hints, key);
- _set_localization_hints(dbconn, engine->hints, rule);
- if (!engine->authenticateRule) {
- engine->authenticateRule = rule_create_with_string("authenticate", dbconn);
- }
- }
-
- authdb_connection_release(&dbconn); // release db handle
-
- engine->currentRightName = key;
- engine->currentRule = rule;
-
- ccaudit_log(ccaudit, key, rule_name, 0);
-
- status = _evaluate_rule(engine, engine->currentRule, &savePassword);
- switch (status) {
- case errAuthorizationSuccess:
- auth_rights_add(engine->grantedRights, key);
- auth_rights_set_flags(engine->grantedRights, key, auth_rights_get_flags(rights,key));
-
- if ((engine->flags & kAuthorizationFlagPreAuthorize) &&
- (rule_get_class(engine->currentRule) == RC_USER) &&
- (rule_get_timeout(engine->currentRule) == 0)) {
- // FIXME: kAuthorizationFlagPreAuthorize => kAuthorizationFlagCanNotPreAuthorize ???
- auth_rights_set_flags(engine->grantedRights, engine->currentRightName, kAuthorizationFlagPreAuthorize);
- }
-
- LOG("Succeeded authorizing right '%s' by client '%s' [%d] for authorization created by '%s' [%d] (%X,%d)",
- key, process_get_code_url(engine->proc), process_get_pid(engine->proc),
- auth_token_get_code_url(engine->auth), auth_token_get_pid(engine->auth), engine->flags, auth_token_least_privileged(engine->auth));
- break;
- case errAuthorizationDenied:
- case errAuthorizationInteractionNotAllowed:
- case errAuthorizationCanceled:
- if (engine->flags & kAuthorizationFlagInteractionAllowed) {
- LOG("Failed to authorize right '%s' by client '%s' [%d] for authorization created by '%s' [%d] (%X,%d) (%i)",
- key, process_get_code_url(engine->proc), process_get_pid(engine->proc),
- auth_token_get_code_url(engine->auth), auth_token_get_pid(engine->auth), engine->flags, auth_token_least_privileged(engine->auth), status);
- } else {
- LOGV("Failed to authorize right '%s' by client '%s' [%d] for authorization created by '%s' [%d] (%X,%d) (%i)",
- key, process_get_code_url(engine->proc), process_get_pid(engine->proc),
- auth_token_get_code_url(engine->auth), auth_token_get_pid(engine->auth), engine->flags, auth_token_least_privileged(engine->auth), status);
- }
- break;
- default:
- LOGE("engine[%i]: evaluate returned %i returning errAuthorizationInternal", connection_get_pid(engine->conn), status);
- status = errAuthorizationInternal;
- break;
- }
-
- ccaudit_log_authorization(ccaudit, engine->currentRightName, status);
-
- CFReleaseSafe(rule);
- engine->currentRightName = NULL;
- engine->currentRule = NULL;
-
- auth_items_remove_with_flags(engine->hints, kEngineHintsFlagTemporary);
-
- if (!(engine->flags & kAuthorizationFlagPartialRights) && (status != errAuthorizationSuccess)) {
- return false;
- }
-
- return true;
- });
-
- if ((engine->flags & kAuthorizationFlagPartialRights) && (auth_rights_get_count(engine->grantedRights) > 0)) {
- status = errAuthorizationSuccess;
- }
-
- if (engine->dismissed) {
- status = errAuthorizationDenied;
- }
-
- LOGV("engine[%i]: authorize result: %i", connection_get_pid(engine->conn), status);
-
- if ((engine->flags & kAuthorizationFlagExtendRights) && !(engine->flags & kAuthorizationFlagDestroyRights)) {
- _cf_set_iterate(engine->credentials, ^bool(CFTypeRef value) {
- credential_t cred = (credential_t)value;
- // skip all uid credentials when running in least privileged
- if (auth_token_least_privileged(engine->auth) && !credential_is_right(cred))
- return true;
-
- session_t session = auth_token_get_session(engine->auth);
- auth_token_set_credential(engine->auth, cred);
- if (credential_get_shared(cred)) {
- session_set_credential(session, cred);
- }
- if (credential_is_right(cred)) {
- LOGV("engine[%i]: adding least privileged %scredential %s to authorization", connection_get_pid(engine->conn), credential_get_shared(cred) ? "shared " : "", credential_get_name(cred));
- } else {
- LOGV("engine[%i]: adding %scredential %s (%i) to authorization", connection_get_pid(engine->conn), credential_get_shared(cred) ? "shared " : "", credential_get_name(cred), credential_get_uid(cred));
- }
- return true;
- });
- }
-
- if (status == errAuthorizationSuccess && savePassword) {
- auth_items_set_flags(engine->context, kAuthorizationEnvironmentPassword, kAuthorizationContextFlagExtractable);
- }
-
- if ((status == errAuthorizationSuccess) || (status == errAuthorizationCanceled)) {
- auth_items_copy_with_flags(auth_token_get_context(engine->auth), engine->context, kAuthorizationContextFlagExtractable);
- }
-
- if (auth_rights_get_count(rights) > 0) {
- ccaudit_log(ccaudit, "end evaluation", NULL, status);
- }
-
-#if DEBUG
- LOGV("engine[%i]: ********** Dumping auth->credentials **********", connection_get_pid(engine->conn));
- auth_token_credentials_iterate(engine->auth, ^bool(credential_t cred) {
- _show_cf(cred);
- return true;
- });
- LOGV("engine[%i]: ********** Dumping session->credentials **********", connection_get_pid(engine->conn));
- session_credentials_iterate(auth_token_get_session(engine->auth), ^bool(credential_t cred) {
- _show_cf(cred);
- return true;
- });
- LOGV("engine[%i]: ********** Dumping engine->context **********", connection_get_pid(engine->conn));
- _show_cf(engine->context);
- LOGV("engine[%i]: ********** Dumping auth->context **********", connection_get_pid(engine->conn));
- _show_cf(auth_token_get_context(engine->auth));
- LOGV("engine[%i]: ********** Dumping granted rights **********", connection_get_pid(engine->conn));
- _show_cf(engine->grantedRights);
-#endif
-
-done:
- auth_items_clear(engine->context);
- auth_items_clear(engine->sticky_context);
- CFReleaseSafe(ccaudit);
- CFDictionaryRemoveAllValues(engine->mechanism_agents);
-
- return status;
-}
-
-static bool
-_wildcard_right_exists(engine_t engine, const char * right)
-{
- // checks if a wild card right exists
- // ex: com.apple. system.
- bool exists = false;
- rule_t rule = NULL;
- authdb_connection_t dbconn = authdb_connection_acquire(server_get_database()); // get db handle
- require(dbconn != NULL, done);
-
- rule = _find_rule(engine, dbconn, right);
- require(rule != NULL, done);
-
- const char * ruleName = rule_get_name(rule);
- require(ruleName != NULL, done);
- size_t len = strlen(ruleName);
- require(len != 0, done);
-
- if (ruleName[len-1] == '.') {
- exists = true;
- goto done;
- }
-
-done:
- authdb_connection_release(&dbconn);
- CFReleaseSafe(rule);
-
- return exists;
-}
-
-// Validate db right modification
-
-// meta rights are constructed as follows:
-// we don't allow setting of wildcard rights, so you can only be more specific
-// note that you should never restrict things with a wildcard right without disallowing
-// changes to the entire domain. ie.
-// system.privilege. -> never
-// config.add.system.privilege. -> never
-// config.modify.system.privilege. -> never
-// config.delete.system.privilege. -> never
-// For now we don't allow any configuration of configuration rules
-// config.config. -> never
-
-OSStatus engine_verify_modification(engine_t engine, rule_t rule, bool remove, bool force_modify)
-{
- OSStatus status = errAuthorizationDenied;
- auth_rights_t checkRight = NULL;
- char buf[BUFSIZ];
- memset(buf, 0, sizeof(buf));
-
- const char * right = rule_get_name(rule);
- require(right != NULL, done);
- size_t len = strlen(right);
- require(len != 0, done);
-
- require_action(right[len-1] != '.', done, LOGE("engine[%i]: not allowed to set wild card rules", connection_get_pid(engine->conn)));
-
- if (strncasecmp(right, kConfigRight, strlen(kConfigRight)) == 0) {
- // special handling of meta right change:
- // config.add. config.modify. config.remove. config.{}.
- // check for config.<right> (which always starts with config.config.)
- strlcat(buf, kConfigRight, sizeof(buf));
- } else {
- bool existing = (rule_get_id(rule) != 0) ? true : _wildcard_right_exists(engine, right);
- if (!remove) {
- if (existing || force_modify) {
- strlcat(buf, kAuthorizationConfigRightModify,sizeof(buf));
- } else {
- strlcat(buf, kAuthorizationConfigRightAdd, sizeof(buf));
- }
- } else {
- if (existing) {
- strlcat(buf, kAuthorizationConfigRightRemove, sizeof(buf));
- } else {
- status = errAuthorizationSuccess;
- goto done;
- }
- }
- }
-
- strlcat(buf, right, sizeof(buf));
-
- checkRight = auth_rights_create();
- auth_rights_add(checkRight, buf);
- status = engine_authorize(engine, checkRight, NULL, kAuthorizationFlagDefaults | kAuthorizationFlagInteractionAllowed | kAuthorizationFlagExtendRights);
-
-done:
- LOGV("engine[%i]: authorizing %s for db modification: %i", connection_get_pid(engine->conn), right, status);
- CFReleaseSafe(checkRight);
- return status;
-}
-
-void
-_engine_set_credential(engine_t engine, credential_t cred, bool shared)
-{
- LOGV("engine[%i]: adding %scredential %s (%i) to engine shared: %i", connection_get_pid(engine->conn), credential_get_shared(cred) ? "shared " : "", credential_get_name(cred), credential_get_uid(cred), shared);
- CFSetSetValue(engine->credentials, cred);
- if (shared) {
- credential_t sharedCred = credential_create_with_credential(cred, true);
- CFSetSetValue(engine->credentials, sharedCred);
- CFReleaseSafe(sharedCred);
- }
-}
-
-auth_rights_t
-engine_get_granted_rights(engine_t engine)
-{
- return engine->grantedRights;
-}
-
-CFAbsoluteTime engine_get_time(engine_t engine)
-{
- return engine->now;
-}
-
-void engine_destroy_agents(engine_t engine)
-{
- engine->dismissed = true;
-
- _cf_dictionary_iterate(engine->mechanism_agents, ^bool(CFTypeRef key __attribute__((__unused__)), CFTypeRef value) {
- LOGD("engine[%i]: Destroying %s", connection_get_pid(engine->conn), mechanism_get_string((mechanism_t)key));
- agent_t agent = (agent_t)value;
- agent_destroy(agent);
-
- return true;
- });
-}
-
-void engine_interrupt_agent(engine_t engine)
-{
- _cf_dictionary_iterate(engine->mechanism_agents, ^bool(CFTypeRef key __attribute__((__unused__)), CFTypeRef value) {
- agent_t agent = (agent_t)value;
- agent_notify_interrupt(agent);
- return true;
- });
-}
projects / apple / security.git / blobdiff