OSX/trustd/trustd.c

   1 /*
   2  * Copyright (c) 2017-2018 Apple Inc.  All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #include <AssertMacros.h>
  25 #include <sandbox.h>
  26 #include <dirhelper_priv.h>
  27 #include <sys/stat.h>
  28 #include <sys/types.h>
  29 #include <pwd.h>
  30 #include <notify.h>
  31 #include <xpc/private.h>
  32 #include <xpc/xpc.h>
  33 #include <CoreFoundation/CFStream.h>
  34 #include <os/assumes.h>
  35
  36 #include <Security/SecuritydXPC.h>
  37 #include <Security/SecTrustStore.h>
  38 #include <Security/SecCertificateInternal.h>
  39 #include <Security/SecEntitlements.h>
  40 #include <Security/SecTrustInternal.h>
  41 #include <Security/SecPolicyPriv.h>
  42 #include <Security/SecItem.h>
  43 #include <Security/SecItemPriv.h>
  44
  45 #include <ipc/securityd_client.h>
  46 #include <ipc/server_entitlement_helpers.h>
  47 #include <utilities/SecCFWrappers.h>
  48 #include <utilities/SecDb.h>
  49 #include <utilities/SecFileLocations.h>
  50 #include <utilities/debugging.h>
  51 #include <utilities/SecXPCError.h>
  52 #include <securityd/SecOCSPCache.h>
  53 #include <securityd/SecTrustStoreServer.h>
  54 #include <securityd/SecPinningDb.h>
  55 #include <securityd/SecPolicyServer.h>
  56 #include <securityd/SecRevocationDb.h>
  57 #include <securityd/SecTrustServer.h>
  58 #include <securityd/spi.h>
  59 #include <securityd/SecTrustLoggingServer.h>
  60 #if TARGET_OS_IPHONE
  61 #include <securityd/SecTrustExceptionResetCount.h>
  62 #endif
  63
  64 #if TARGET_OS_OSX
  65 #include <Security/SecTaskPriv.h>
  66 #include <login/SessionAgentStatusCom.h>
  67 #include <trustd/macOS/SecTrustOSXEntryPoints.h>
  68 #endif
  69
  70 #include "OTATrustUtilities.h"
  71 #include "trustd_spi.h"
  72
  73 static bool SecXPCDictionarySetChainOptional(xpc_object_t message, const char *key, CFArrayRef path, CFErrorRef *error) {
  74     if (!path)
  75         return true;
  76     __block xpc_object_t xpc_chain = NULL;
  77     require_action_quiet(xpc_chain = xpc_array_create(NULL, 0), exit, SecError(errSecParam, error, CFSTR("xpc_array_create failed")));
  78     CFArrayForEach(path, ^(const void *value) {
  79         SecCertificateRef cert = (SecCertificateRef)value;
  80         if (xpc_chain && !SecCertificateAppendToXPCArray(cert, xpc_chain, error)) {
  81             xpc_release(xpc_chain);
  82             xpc_chain = NULL;
  83         }
  84     });
  85
  86 exit:
  87     if (!xpc_chain)
  88         return false;
  89
  90     xpc_dictionary_set_value(message, key, xpc_chain);
  91     xpc_release(xpc_chain);
  92     return true;
  93 }
  94
  95 static SecCertificateRef SecXPCDictionaryCopyCertificate(xpc_object_t message, const char *key, CFErrorRef *error) {
  96     size_t length = 0;
  97     const void *bytes = xpc_dictionary_get_data(message, key, &length);
  98     if (bytes) {
  99         SecCertificateRef certificate = SecCertificateCreateWithBytes(kCFAllocatorDefault, bytes, length);
 100         if (certificate)
 101             return certificate;
 102         SecError(errSecDecode, error, CFSTR("object for key %s failed to create certificate from data"), key);
 103     } else {
 104         SecError(errSecParam, error, CFSTR("object for key %s missing"), key);
 105     }
 106     return NULL;
 107 }
 108
 109 static bool SecXPCDictionaryCopyCertificates(xpc_object_t message, const char *key, CFArrayRef *certificates, CFErrorRef *error) {
 110     xpc_object_t xpc_certificates = xpc_dictionary_get_value(message, key);
 111     if (!xpc_certificates)
 112         return SecError(errSecAllocate, error, CFSTR("no certs for key %s"), key);
 113     *certificates = SecCertificateXPCArrayCopyArray(xpc_certificates, error);
 114     return *certificates;
 115 }
 116
 117 static bool SecXPCDictionaryCopyCertificatesOptional(xpc_object_t message, const char *key, CFArrayRef *certificates, CFErrorRef *error) {
 118     xpc_object_t xpc_certificates = xpc_dictionary_get_value(message, key);
 119     if (!xpc_certificates) {
 120         *certificates = NULL;
 121         return true;
 122     }
 123     *certificates = SecCertificateXPCArrayCopyArray(xpc_certificates, error);
 124     return *certificates;
 125 }
 126
 127 static bool SecXPCDictionaryCopyPoliciesOptional(xpc_object_t message, const char *key, CFArrayRef *policies, CFErrorRef *error) {
 128     xpc_object_t xpc_policies = xpc_dictionary_get_value(message, key);
 129     if (!xpc_policies) {
 130         if (policies)
 131             *policies = NULL;
 132         return true;
 133     }
 134     *policies = SecPolicyXPCArrayCopyArray(xpc_policies, error);
 135     return *policies != NULL;
 136 }
 137
 138 // Returns error if entitlement isn't present.
 139 static bool
 140 EntitlementPresentAndTrue(uint64_t op, SecTaskRef clientTask, CFStringRef entitlement, CFErrorRef *error)
 141 {
 142     if (!SecTaskGetBooleanValueForEntitlement(clientTask, entitlement)) {
 143         SecError(errSecMissingEntitlement, error, CFSTR("%@: %@ lacks entitlement %@"), SOSCCGetOperationDescription((enum SecXPCOperation)op), clientTask, entitlement);
 144         return false;
 145     }
 146     return true;
 147 }
 148
 149 static SecTrustStoreRef SecXPCDictionaryGetTrustStore(xpc_object_t message, const char *key, CFErrorRef *error) {
 150     SecTrustStoreRef ts = NULL;
 151     CFStringRef domain = SecXPCDictionaryCopyString(message, key, error);
 152     if (domain) {
 153         ts = SecTrustStoreForDomainName(domain, error);
 154         CFRelease(domain);
 155     }
 156     return ts;
 157 }
 158
 159 static bool SecXPCTrustStoreContains(SecurityClient * __unused client, xpc_object_t event,
 160                                      xpc_object_t reply, CFErrorRef *error) {
 161     bool result = false;
 162     SecTrustStoreRef ts = SecXPCDictionaryGetTrustStore(event, kSecXPCKeyDomain, error);
 163     if (ts) {
 164         CFDataRef digest = SecXPCDictionaryCopyData(event, kSecXPCKeyDigest, error);
 165         if (digest) {
 166             bool contains;
 167             if (SecTrustStoreContainsCertificateWithDigest(ts, digest, &contains, error)) {
 168                 xpc_dictionary_set_bool(reply, kSecXPCKeyResult, contains);
 169                 result = true;
 170             }
 171             CFReleaseNull(digest);
 172         }
 173     }
 174     return result;
 175 }
 176
 177 static bool SecXPCTrustStoreSetTrustSettings(SecurityClient * __unused client, xpc_object_t event,
 178                                              xpc_object_t reply, CFErrorRef *error) {
 179     bool noError = false;
 180     SecTrustStoreRef ts = SecXPCDictionaryGetTrustStore(event, kSecXPCKeyDomain, error);
 181     if (ts) {
 182         SecCertificateRef certificate = SecXPCDictionaryCopyCertificate(event, kSecXPCKeyCertificate, error);
 183         if (certificate) {
 184             CFTypeRef trustSettingsDictOrArray = NULL;
 185             if (SecXPCDictionaryCopyPListOptional(event, kSecXPCKeySettings, &trustSettingsDictOrArray, error)) {
 186                 bool result = _SecTrustStoreSetTrustSettings(ts, certificate, trustSettingsDictOrArray, error);
 187                 xpc_dictionary_set_bool(reply, kSecXPCKeyResult, result);
 188                 noError = true;
 189                 CFReleaseSafe(trustSettingsDictOrArray);
 190             }
 191             CFReleaseNull(certificate);
 192         }
 193     }
 194     return noError;
 195 }
 196
 197 static bool SecXPCTrustStoreRemoveCertificate(SecurityClient * __unused client, xpc_object_t event,
 198                                               xpc_object_t reply, CFErrorRef *error) {
 199     SecTrustStoreRef ts = SecXPCDictionaryGetTrustStore(event, kSecXPCKeyDomain, error);
 200     if (ts) {
 201         CFDataRef digest = SecXPCDictionaryCopyData(event, kSecXPCKeyDigest, error);
 202         if (digest) {
 203             bool result = SecTrustStoreRemoveCertificateWithDigest(ts, digest, error);
 204             xpc_dictionary_set_bool(reply, kSecXPCKeyResult, result);
 205             CFReleaseNull(digest);
 206             return true;
 207         }
 208     }
 209     return false;
 210 }
 211
 212 static bool SecXPCTrustStoreCopyAll(SecurityClient * __unused client, xpc_object_t event,
 213                                     xpc_object_t reply, CFErrorRef *error) {
 214     SecTrustStoreRef ts = SecXPCDictionaryGetTrustStore(event, kSecXPCKeyDomain, error);
 215     if (ts) {
 216         CFArrayRef trustStoreContents = NULL;
 217         if(_SecTrustStoreCopyAll(ts, &trustStoreContents, error) && trustStoreContents) {
 218             SecXPCDictionarySetPList(reply, kSecXPCKeyResult, trustStoreContents, error);
 219             CFReleaseNull(trustStoreContents);
 220             return true;
 221         }
 222     }
 223     return false;
 224 }
 225
 226 static bool SecXPCTrustStoreCopyUsageConstraints(SecurityClient * __unused client, xpc_object_t event,
 227                                                  xpc_object_t reply, CFErrorRef *error) {
 228     bool result = false;
 229     SecTrustStoreRef ts = SecXPCDictionaryGetTrustStore(event, kSecXPCKeyDomain, error);
 230     if (ts) {
 231         CFDataRef digest = SecXPCDictionaryCopyData(event, kSecXPCKeyDigest, error);
 232         if (digest) {
 233             CFArrayRef usageConstraints = NULL;
 234             if(_SecTrustStoreCopyUsageConstraints(ts, digest, &usageConstraints, error) && usageConstraints) {
 235                 SecXPCDictionarySetPList(reply, kSecXPCKeyResult, usageConstraints, error);
 236                 CFReleaseNull(usageConstraints);
 237                 result = true;
 238             }
 239             CFReleaseNull(digest);
 240         }
 241     }
 242     return result;
 243 }
 244
 245 static bool SecXPC_OCSPCacheFlush(SecurityClient * __unused client, xpc_object_t __unused event,
 246                                   xpc_object_t __unused reply, CFErrorRef *error) {
 247     if(SecOCSPCacheFlush(error)) {
 248         return true;
 249     }
 250     return false;
 251 }
 252
 253 static bool SecXPC_OTAPKI_GetCurrentTrustStoreVersion(SecurityClient * __unused client, xpc_object_t __unused event,
 254                                           xpc_object_t reply, CFErrorRef *error) {
 255     xpc_dictionary_set_uint64(reply, kSecXPCKeyResult, SecOTAPKIGetCurrentTrustStoreVersion(error));
 256     return true;
 257 }
 258
 259 static bool SecXPC_OTAPKI_GetCurrentAssetVersion(SecurityClient * __unused client, xpc_object_t __unused event,
 260                                                  xpc_object_t reply, CFErrorRef *error) {
 261     xpc_dictionary_set_uint64(reply, kSecXPCKeyResult, SecOTAPKIGetCurrentAssetVersion(error));
 262     return true;
 263 }
 264
 265 static bool SecXPC_OTAPKI_GetEscrowCertificates(SecurityClient * __unused client, xpc_object_t event,
 266                                                 xpc_object_t reply, CFErrorRef *error) {
 267     bool result = false;
 268     uint32_t escrowRootType = (uint32_t)xpc_dictionary_get_uint64(event, "escrowType");
 269     CFArrayRef array = SecOTAPKICopyCurrentEscrowCertificates(escrowRootType, error);
 270     if (array) {
 271         xpc_object_t xpc_array = _CFXPCCreateXPCObjectFromCFObject(array);
 272         xpc_dictionary_set_value(reply, kSecXPCKeyResult, xpc_array);
 273         xpc_release(xpc_array);
 274         result = true;
 275     }
 276     CFReleaseNull(array);
 277     return result;
 278 }
 279
 280 static bool SecXPC_OTAPKI_GetNewAsset(SecurityClient * __unused client, xpc_object_t __unused event,
 281                                       xpc_object_t reply, CFErrorRef *error) {
 282     xpc_dictionary_set_uint64(reply, kSecXPCKeyResult, SecOTAPKISignalNewAsset(error));
 283     return true;
 284 }
 285
 286 static bool SecXPC_OTASecExperiment_GetNewAsset(SecurityClient * __unused client, xpc_object_t __unused event,
 287                                       xpc_object_t reply, CFErrorRef *error) {
 288     xpc_dictionary_set_uint64(reply, kSecXPCKeyResult, SecOTASecExperimentGetNewAsset(error));
 289     return true;
 290 }
 291
 292 static bool SecXPC_OTASecExperiment_GetAsset(SecurityClient * __unused client, xpc_object_t __unused event,
 293                                       xpc_object_t reply, CFErrorRef *error) {
 294     bool result = false;
 295     CFDictionaryRef asset = SecOTASecExperimentCopyAsset(error);
 296     if (asset) {
 297         xpc_object_t xpc_dict = _CFXPCCreateXPCObjectFromCFObject(asset);
 298         if (xpc_dict) {
 299             xpc_dictionary_set_value(reply, kSecXPCKeyResult, xpc_dict);
 300             xpc_release(xpc_dict);
 301             result = true;
 302         }
 303     }
 304     CFReleaseNull(asset);
 305     return result;
 306 }
 307
 308 static bool SecXPC_OTAPKI_CopyTrustedCTLogs(SecurityClient * __unused client, xpc_object_t event,
 309                                             xpc_object_t reply, CFErrorRef *error) {
 310     bool result = false;
 311     CFDictionaryRef trustedLogs = SecOTAPKICopyCurrentTrustedCTLogs(error);
 312     if (trustedLogs) {
 313         xpc_object_t xpc_dictionary = _CFXPCCreateXPCObjectFromCFObject(trustedLogs);
 314         if (xpc_dictionary) {
 315             xpc_dictionary_set_value(reply, kSecXPCKeyResult, xpc_dictionary);
 316             xpc_release(xpc_dictionary);
 317             result = true;
 318         }
 319     }
 320     CFReleaseNull(trustedLogs);
 321     return result;
 322 }
 323
 324 static bool SecXPC_OTAPKI_CopyCTLogForKeyID(SecurityClient * __unused client, xpc_object_t event,
 325                                             xpc_object_t reply, CFErrorRef *error) {
 326     bool result = false;
 327     size_t length = 0;
 328     const void *bytes = xpc_dictionary_get_data(event, kSecXPCData, &length);
 329     CFDataRef keyID = CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, bytes, length, kCFAllocatorNull);
 330     if (keyID) {
 331         CFDictionaryRef logDict = SecOTAPKICopyCTLogForKeyID(keyID, error);
 332         if (logDict) {
 333             xpc_object_t xpc_dictionary = _CFXPCCreateXPCObjectFromCFObject(logDict);
 334             xpc_dictionary_set_value(reply, kSecXPCKeyResult, xpc_dictionary);
 335             xpc_release(xpc_dictionary);
 336             CFReleaseNull(logDict);
 337             result = true;
 338         }
 339         CFReleaseNull(keyID);
 340     }
 341     return result;
 342 }
 343
 344 static bool SecXPC_Networking_AnalyticsReport(SecurityClient * __unused client, xpc_object_t event,
 345                                        xpc_object_t reply, CFErrorRef *error) {
 346     xpc_object_t attributes = xpc_dictionary_get_dictionary(event, kSecTrustEventAttributesKey);
 347     CFStringRef eventName = SecXPCDictionaryCopyString(event, kSecTrustEventNameKey, error);
 348     bool result = false;
 349     if (attributes && eventName) {
 350         result = SecNetworkingAnalyticsReport(eventName, attributes, error);
 351     }
 352     xpc_dictionary_set_bool(reply, kSecXPCKeyResult, result);
 353     CFReleaseNull(eventName);
 354     return result;
 355 }
 356
 357 static bool SecXPCTrustStoreSetCTExceptions(SecurityClient *client, xpc_object_t event,
 358                                             xpc_object_t reply, CFErrorRef *error) {
 359     CFStringRef appID = NULL;
 360     CFDictionaryRef exceptions = NULL;
 361     if (!SecXPCDictionaryCopyStringOptional(event, kSecTrustEventApplicationID, &appID, error) || !appID) {
 362         /* We always want to set the app ID with the exceptions */
 363         appID = SecTaskCopyApplicationIdentifier(client->task);
 364     }
 365     (void)SecXPCDictionaryCopyDictionaryOptional(event, kSecTrustExceptionsKey, &exceptions, error);
 366     bool result = _SecTrustStoreSetCTExceptions(appID, exceptions, error);
 367     xpc_dictionary_set_bool(reply, kSecXPCKeyResult, result);
 368     CFReleaseNull(exceptions);
 369     CFReleaseNull(appID);
 370     return false;
 371 }
 372
 373 static bool SecXPCTrustStoreCopyCTExceptions(SecurityClient * __unused client, xpc_object_t event,
 374                                              xpc_object_t reply, CFErrorRef *error) {
 375     CFStringRef appID = NULL;
 376     (void)SecXPCDictionaryCopyStringOptional(event, kSecTrustEventApplicationID, &appID, error);
 377     CFDictionaryRef exceptions = _SecTrustStoreCopyCTExceptions(appID, error);
 378     SecXPCDictionarySetPListOptional(reply, kSecTrustExceptionsKey, exceptions, error);
 379     CFReleaseNull(exceptions);
 380     CFReleaseNull(appID);
 381     return false;
 382 }
 383
 384 #if TARGET_OS_IPHONE
 385 static bool SecXPCTrustGetExceptionResetCount(SecurityClient * __unused client, xpc_object_t event, xpc_object_t reply, CFErrorRef *error) {
 386     uint64_t exceptionResetCount = SecTrustServerGetExceptionResetCount(error);
 387     if (error && *error) {
 388         return false;
 389     }
 390
 391     xpc_dictionary_set_uint64(reply, kSecXPCKeyResult, exceptionResetCount);
 392     return true;
 393 }
 394
 395 static bool SecXPCTrustIncrementExceptionResetCount(SecurityClient * __unused client, xpc_object_t event, xpc_object_t reply, CFErrorRef *error) {
 396     OSStatus status = errSecInternal;
 397     bool result = SecTrustServerIncrementExceptionResetCount(error);
 398     if (result && (!error || (error && !*error))) {
 399         status = errSecSuccess;
 400     }
 401
 402     xpc_dictionary_set_bool(reply, kSecXPCKeyResult, status);
 403     return result;
 404 }
 405 #endif
 406
 407 typedef bool(*SecXPCOperationHandler)(SecurityClient *client, xpc_object_t event, xpc_object_t reply, CFErrorRef *error);
 408
 409 typedef struct {
 410     CFStringRef entitlement;
 411     SecXPCOperationHandler handler;
 412 } SecXPCServerOperation;
 413
 414 struct trustd_operations {
 415     SecXPCServerOperation trust_store_contains;
 416     SecXPCServerOperation trust_store_set_trust_settings;
 417     SecXPCServerOperation trust_store_remove_certificate;
 418     SecXPCServerOperation trust_store_copy_all;
 419     SecXPCServerOperation trust_store_copy_usage_constraints;
 420     SecXPCServerOperation ocsp_cache_flush;
 421     SecXPCServerOperation ota_pki_trust_store_version;
 422     SecXPCServerOperation ota_pki_asset_version;
 423     SecXPCServerOperation ota_pki_get_escrow_certs;
 424     SecXPCServerOperation ota_pki_get_new_asset;
 425     SecXPCServerOperation ota_pki_copy_trusted_ct_logs;
 426     SecXPCServerOperation ota_pki_copy_ct_log_for_keyid;
 427     SecXPCServerOperation networking_analytics_report;
 428     SecXPCServerOperation trust_store_set_ct_exceptions;
 429     SecXPCServerOperation trust_store_copy_ct_exceptions;
 430     SecXPCServerOperation ota_secexperiment_get_asset;
 431     SecXPCServerOperation ota_secexperiment_get_new_asset;
 432 #if TARGET_OS_IPHONE
 433     SecXPCServerOperation trust_get_exception_reset_count;
 434     SecXPCServerOperation trust_increment_exception_reset_count;
 435 #endif
 436 };
 437
 438 static struct trustd_operations trustd_ops = {
 439     .trust_store_contains = { NULL, SecXPCTrustStoreContains },
 440     .trust_store_set_trust_settings = { kSecEntitlementModifyAnchorCertificates, SecXPCTrustStoreSetTrustSettings },
 441     .trust_store_remove_certificate = { kSecEntitlementModifyAnchorCertificates, SecXPCTrustStoreRemoveCertificate },
 442     .trust_store_copy_all = { kSecEntitlementModifyAnchorCertificates, SecXPCTrustStoreCopyAll },
 443     .trust_store_copy_usage_constraints = { kSecEntitlementModifyAnchorCertificates, SecXPCTrustStoreCopyUsageConstraints },
 444     .ocsp_cache_flush = { NULL, SecXPC_OCSPCacheFlush },
 445     .ota_pki_trust_store_version = { NULL, SecXPC_OTAPKI_GetCurrentTrustStoreVersion },
 446     .ota_pki_asset_version = { NULL, SecXPC_OTAPKI_GetCurrentAssetVersion },
 447     .ota_pki_get_escrow_certs = { NULL, SecXPC_OTAPKI_GetEscrowCertificates },
 448     .ota_pki_get_new_asset = { NULL, SecXPC_OTAPKI_GetNewAsset },
 449     .ota_secexperiment_get_new_asset = { NULL, SecXPC_OTASecExperiment_GetNewAsset },
 450     .ota_secexperiment_get_asset = { NULL, SecXPC_OTASecExperiment_GetAsset },
 451     .ota_pki_copy_trusted_ct_logs = { NULL, SecXPC_OTAPKI_CopyTrustedCTLogs },
 452     .ota_pki_copy_ct_log_for_keyid = { NULL, SecXPC_OTAPKI_CopyCTLogForKeyID },
 453     .networking_analytics_report = { NULL, SecXPC_Networking_AnalyticsReport },
 454     .trust_store_set_ct_exceptions = {kSecEntitlementModifyAnchorCertificates, SecXPCTrustStoreSetCTExceptions },
 455     .trust_store_copy_ct_exceptions = {kSecEntitlementModifyAnchorCertificates, SecXPCTrustStoreCopyCTExceptions },
 456 #if TARGET_OS_IPHONE
 457     .trust_get_exception_reset_count = { NULL, SecXPCTrustGetExceptionResetCount },
 458     .trust_increment_exception_reset_count = { kSecEntitlementModifyAnchorCertificates, SecXPCTrustIncrementExceptionResetCount },
 459 #endif
 460 };
 461
 462 static void trustd_xpc_dictionary_handler(const xpc_connection_t connection, xpc_object_t event) {
 463     xpc_type_t type = xpc_get_type(event);
 464     __block CFErrorRef error = NULL;
 465     xpc_object_t xpcError = NULL;
 466     xpc_object_t replyMessage = NULL;
 467     CFDataRef  clientAuditToken = NULL;
 468     CFArrayRef domains = NULL;
 469     SecurityClient client = {
 470         .task = NULL,
 471         .accessGroups = NULL,
 472         .musr = NULL,
 473         .uid = xpc_connection_get_euid(connection),
 474         .allowSystemKeychain = true,
 475         .allowSyncBubbleKeychain = false,
 476         .isNetworkExtension = false,
 477         .canAccessNetworkExtensionAccessGroups = false,
 478 #if TARGET_OS_IPHONE
 479         .inMultiUser = false,
 480 #endif
 481     };
 482
 483     secdebug("serverxpc", "entering");
 484     if (type == XPC_TYPE_DICTIONARY) {
 485         replyMessage = xpc_dictionary_create_reply(event);
 486
 487         uint64_t operation = xpc_dictionary_get_uint64(event, kSecXPCKeyOperation);
 488
 489         audit_token_t auditToken = {};
 490         xpc_connection_get_audit_token(connection, &auditToken);
 491
 492         client.task = SecTaskCreateWithAuditToken(kCFAllocatorDefault, auditToken);
 493         clientAuditToken = CFDataCreate(kCFAllocatorDefault, (const UInt8*)&auditToken, sizeof(auditToken));
 494         client.accessGroups = SecTaskCopyAccessGroups(client.task);
 495
 496         secinfo("serverxpc", "XPC [%@] operation: %@ (%" PRIu64 ")", client.task, SOSCCGetOperationDescription((enum SecXPCOperation)operation), operation);
 497
 498         if (operation == sec_trust_evaluate_id) {
 499             CFArrayRef certificates = NULL, anchors = NULL, policies = NULL, responses = NULL, scts = NULL, trustedLogs = NULL, exceptions = NULL;
 500             bool anchorsOnly = xpc_dictionary_get_bool(event, kSecTrustAnchorsOnlyKey);
 501             bool keychainsAllowed = xpc_dictionary_get_bool(event, kSecTrustKeychainsAllowedKey);
 502             double verifyTime;
 503             if (SecXPCDictionaryCopyCertificates(event, kSecTrustCertificatesKey, &certificates, &error) &&
 504                 SecXPCDictionaryCopyCertificatesOptional(event, kSecTrustAnchorsKey, &anchors, &error) &&
 505                 SecXPCDictionaryCopyPoliciesOptional(event, kSecTrustPoliciesKey, &policies, &error) &&
 506                 SecXPCDictionaryCopyCFDataArrayOptional(event, kSecTrustResponsesKey, &responses, &error) &&
 507                 SecXPCDictionaryCopyCFDataArrayOptional(event, kSecTrustSCTsKey, &scts, &error) &&
 508                 SecXPCDictionaryCopyArrayOptional(event, kSecTrustTrustedLogsKey, &trustedLogs, &error) &&
 509                 SecXPCDictionaryGetDouble(event, kSecTrustVerifyDateKey, &verifyTime, &error) &&
 510                 SecXPCDictionaryCopyArrayOptional(event, kSecTrustExceptionsKey, &exceptions, &error)) {
 511                 // If we have no error yet, capture connection and reply in block and properly retain them.
 512                 xpc_retain(connection);
 513                 CFRetainSafe(client.task);
 514                 CFRetainSafe(clientAuditToken);
 515
 516                 // Clear replyMessage so we don't send a synchronous reply.
 517                 xpc_object_t asyncReply = replyMessage;
 518                 replyMessage = NULL;
 519
 520                 SecTrustServerEvaluateBlock(SecTrustServerGetWorkloop(), clientAuditToken, certificates, anchors, anchorsOnly, keychainsAllowed, policies,
 521                                             responses, scts, trustedLogs, verifyTime, client.accessGroups, exceptions,
 522                                             ^(SecTrustResultType tr, CFArrayRef details, CFDictionaryRef info, CFArrayRef chain,
 523                                               CFErrorRef replyError) {
 524                     // Send back reply now
 525                     if (replyError) {
 526                         CFRetain(replyError);
 527                     } else {
 528                         xpc_dictionary_set_int64(asyncReply, kSecTrustResultKey, tr);
 529                         SecXPCDictionarySetPListOptional(asyncReply, kSecTrustDetailsKey, details, &replyError) &&
 530                         SecXPCDictionarySetPListOptional(asyncReply, kSecTrustInfoKey, info, &replyError) &&
 531                         SecXPCDictionarySetChainOptional(asyncReply, kSecTrustChainKey, chain, &replyError);
 532                     }
 533                     if (replyError) {
 534                         secdebug("ipc", "%@ %@ %@", client.task, SOSCCGetOperationDescription((enum SecXPCOperation)operation), replyError);
 535                         xpc_object_t xpcReplyError = SecCreateXPCObjectWithCFError(replyError);
 536                         if (xpcReplyError) {
 537                             xpc_dictionary_set_value(asyncReply, kSecXPCKeyError, xpcReplyError);
 538                             xpc_release(xpcReplyError);
 539                         }
 540                         CFReleaseNull(replyError);
 541                     } else {
 542                         secdebug("ipc", "%@ %@ responding %@", client.task, SOSCCGetOperationDescription((enum SecXPCOperation)operation), asyncReply);
 543                     }
 544
 545                     xpc_connection_send_message(connection, asyncReply);
 546                     xpc_release(asyncReply);
 547                     xpc_release(connection);
 548                     CFReleaseSafe(client.task);
 549                     CFReleaseSafe(clientAuditToken);
 550                 });
 551             }
 552             CFReleaseSafe(policies);
 553             CFReleaseSafe(anchors);
 554             CFReleaseSafe(certificates);
 555             CFReleaseSafe(responses);
 556             CFReleaseSafe(scts);
 557             CFReleaseSafe(trustedLogs);
 558             CFReleaseSafe(exceptions);
 559         } else {
 560             SecXPCServerOperation *server_op = NULL;
 561             switch (operation) {
 562                 case sec_trust_store_contains_id:
 563                     server_op = &trustd_ops.trust_store_contains;
 564                     break;
 565                 case sec_trust_store_set_trust_settings_id:
 566                     server_op = &trustd_ops.trust_store_set_trust_settings;
 567                     break;
 568                 case sec_trust_store_remove_certificate_id:
 569                     server_op = &trustd_ops.trust_store_remove_certificate;
 570                     break;
 571                 case sec_trust_store_copy_all_id:
 572                     server_op = &trustd_ops.trust_store_copy_all;
 573                     break;
 574                 case sec_trust_store_copy_usage_constraints_id:
 575                     server_op = &trustd_ops.trust_store_copy_usage_constraints;
 576                     break;
 577                 case sec_ocsp_cache_flush_id:
 578                     server_op = &trustd_ops.ocsp_cache_flush;
 579                     break;
 580                 case sec_ota_pki_trust_store_version_id:
 581                     server_op = &trustd_ops.ota_pki_trust_store_version;
 582                     break;
 583                 case sec_ota_pki_asset_version_id:
 584                     server_op = &trustd_ops.ota_pki_asset_version;
 585                     break;
 586                 case kSecXPCOpOTAGetEscrowCertificates:
 587                     server_op = &trustd_ops.ota_pki_get_escrow_certs;
 588                     break;
 589                 case kSecXPCOpOTAPKIGetNewAsset:
 590                     server_op = &trustd_ops.ota_pki_get_new_asset;
 591                     break;
 592                 case kSecXPCOpOTASecExperimentGetNewAsset:
 593                     server_op = &trustd_ops.ota_secexperiment_get_new_asset;
 594                     break;
 595                 case kSecXPCOpOTASecExperimentGetAsset:
 596                     server_op = &trustd_ops.ota_secexperiment_get_asset;
 597                     break;
 598                 case kSecXPCOpOTAPKICopyTrustedCTLogs:
 599                     server_op = &trustd_ops.ota_pki_copy_trusted_ct_logs;
 600                     break;
 601                 case kSecXPCOpOTAPKICopyCTLogForKeyID:
 602                     server_op = &trustd_ops.ota_pki_copy_ct_log_for_keyid;
 603                     break;
 604                 case kSecXPCOpNetworkingAnalyticsReport:
 605                     server_op = &trustd_ops.networking_analytics_report;
 606                     break;
 607                 case kSecXPCOpSetCTExceptions:
 608                     server_op = &trustd_ops.trust_store_set_ct_exceptions;
 609                     break;
 610                 case kSecXPCOpCopyCTExceptions:
 611                     server_op = &trustd_ops.trust_store_copy_ct_exceptions;
 612                     break;
 613 #if TARGET_OS_IPHONE
 614                 case sec_trust_get_exception_reset_count_id:
 615                     server_op = &trustd_ops.trust_get_exception_reset_count;
 616                     break;
 617                 case sec_trust_increment_exception_reset_count_id:
 618                     server_op = &trustd_ops.trust_increment_exception_reset_count;
 619                     break;
 620 #endif
 621                 default:
 622                     break;
 623             }
 624             if (server_op && server_op->handler) {
 625                 bool entitled = true;
 626                 if (server_op->entitlement) {
 627                     entitled = EntitlementPresentAndTrue(operation, client.task, server_op->entitlement, &error);
 628                 }
 629                 if (entitled) {
 630                     (void)server_op->handler(&client, event, replyMessage, &error);
 631                 }
 632             }
 633         }
 634
 635         if (error)
 636         {
 637             if(SecErrorGetOSStatus(error) == errSecItemNotFound)
 638                 secdebug("ipc", "%@ %@ %@", client.task, SOSCCGetOperationDescription((enum SecXPCOperation)operation), error);
 639             else if (SecErrorGetOSStatus(error) == errSecAuthNeeded)
 640                 secwarning("Authentication is needed %@ %@ %@", client.task, SOSCCGetOperationDescription((enum SecXPCOperation)operation), error);
 641             else
 642                 secerror("%@ %@ %@", client.task, SOSCCGetOperationDescription((enum SecXPCOperation)operation), error);
 643
 644             xpcError = SecCreateXPCObjectWithCFError(error);
 645             if (replyMessage) {
 646                 xpc_dictionary_set_value(replyMessage, kSecXPCKeyError, xpcError);
 647             }
 648         } else if (replyMessage) {
 649             secdebug("ipc", "%@ %@ responding %@", client.task, SOSCCGetOperationDescription((enum SecXPCOperation)operation), replyMessage);
 650         }
 651     } else {
 652         SecCFCreateErrorWithFormat(kSecXPCErrorUnexpectedType, sSecXPCErrorDomain, NULL, &error, 0, CFSTR("Messages expect to be xpc dictionary, got: %@"), event);
 653         secerror("%@: returning error: %@", client.task, error);
 654         xpcError = SecCreateXPCObjectWithCFError(error);
 655         replyMessage = xpc_create_reply_with_format(event, "{%string: %value}", kSecXPCKeyError, xpcError);
 656     }
 657
 658     if (replyMessage) {
 659         xpc_connection_send_message(connection, replyMessage);
 660         xpc_release(replyMessage);
 661     }
 662     if (xpcError)
 663         xpc_release(xpcError);
 664     CFReleaseSafe(error);
 665     CFReleaseSafe(client.accessGroups);
 666     CFReleaseSafe(client.musr);
 667     CFReleaseSafe(client.task);
 668     CFReleaseSafe(domains);
 669     CFReleaseSafe(clientAuditToken);
 670 }
 671
 672 static void trustd_xpc_init(const char *service_name)
 673 {
 674     secdebug("serverxpc", "start");
 675     xpc_connection_t listener = xpc_connection_create_mach_service(service_name, NULL, XPC_CONNECTION_MACH_SERVICE_LISTENER);
 676     if (!listener) {
 677         seccritical("security failed to register xpc listener for %s, exiting", service_name);
 678         abort();
 679     }
 680
 681     xpc_connection_set_event_handler(listener, ^(xpc_object_t connection) {
 682         if (xpc_get_type(connection) == XPC_TYPE_CONNECTION) {
 683             xpc_connection_set_target_queue(connection, SecTrustServerGetWorkloop());
 684             xpc_connection_set_event_handler(connection, ^(xpc_object_t event) {
 685                 if (xpc_get_type(event) == XPC_TYPE_DICTIONARY) {
 686                     trustd_xpc_dictionary_handler(connection, event);
 687                 }
 688             });
 689             xpc_connection_activate(connection);
 690         }
 691     });
 692     xpc_connection_activate(listener);
 693 }
 694
 695 static void trustd_sandbox(void) {
 696 #if TARGET_OS_OSX
 697     char buf[PATH_MAX] = "";
 698
 699     if (!_set_user_dir_suffix("com.apple.trustd") ||
 700         confstr(_CS_DARWIN_USER_TEMP_DIR, buf, sizeof(buf)) == 0 ||
 701         (mkdir(buf, 0700) && errno != EEXIST)) {
 702         secerror("failed to initialize temporary directory (%d): %s", errno, strerror(errno));
 703         exit(EXIT_FAILURE);
 704     }
 705
 706     char *tempdir = realpath(buf, NULL);
 707     if (tempdir == NULL) {
 708         secerror("failed to resolve temporary directory (%d): %s", errno, strerror(errno));
 709         exit(EXIT_FAILURE);
 710     }
 711
 712     if (confstr(_CS_DARWIN_USER_CACHE_DIR, buf, sizeof(buf)) == 0 ||
 713         (mkdir(buf, 0700) && errno != EEXIST)) {
 714         secerror("failed to initialize cache directory (%d): %s", errno, strerror(errno));
 715         exit(EXIT_FAILURE);
 716     }
 717
 718     char *cachedir = realpath(buf, NULL);
 719     if (cachedir == NULL) {
 720         secerror("failed to resolve cache directory (%d): %s", errno, strerror(errno));
 721         exit(EXIT_FAILURE);
 722     }
 723
 724     const char *parameters[] = {
 725         "_TMPDIR", tempdir,
 726         "_DARWIN_CACHE_DIR", cachedir,
 727         NULL
 728     };
 729
 730     char *sberror = NULL;
 731     if (sandbox_init_with_parameters("com.apple.trustd", SANDBOX_NAMED, parameters, &sberror) != 0) {
 732         secerror("Failed to enter trustd sandbox: %{public}s", sberror);
 733         exit(EXIT_FAILURE);
 734     }
 735
 736     free(tempdir);
 737     free(cachedir);
 738 #else // !TARGET_OS_OSX
 739     char buf[PATH_MAX] = "";
 740     _set_user_dir_suffix("com.apple.trustd");
 741     confstr(_CS_DARWIN_USER_TEMP_DIR, buf, sizeof(buf));
 742 #endif // !TARGET_OS_OSX
 743 }
 744
 745 int main(int argc, char *argv[])
 746 {
 747     DisableLocalization();
 748
 749     char *wait4debugger = getenv("WAIT4DEBUGGER");
 750     if (wait4debugger && !strcasecmp("YES", wait4debugger)) {
 751         seccritical("SIGSTOPing self, awaiting debugger");
 752         kill(getpid(), SIGSTOP);
 753         seccritical("Again, for good luck (or bad debuggers)");
 754         kill(getpid(), SIGSTOP);
 755     }
 756
 757     trustd_sandbox();
 758
 759     const char *serviceName = kTrustdXPCServiceName;
 760     if (argc > 1 && (!strcmp(argv[1], "--agent"))) {
 761         serviceName = kTrustdAgentXPCServiceName;
 762     }
 763
 764     /* set up SQLite before some other component has a chance to create a database connection */
 765     _SecDbServerSetup();
 766
 767     gTrustd = &trustd_spi;
 768
 769     /* Initialize static content */
 770     SecPolicyServerInitialize();    // set up callbacks for policy checks
 771     SecRevocationDbInitialize();    // set up revocation database if it doesn't already exist, or needs to be replaced
 772     SecPinningDbInitialize();       // set up the pinning database
 773 #if TARGET_OS_OSX
 774     SecTrustLegacySourcesListenForKeychainEvents(); // set up the legacy keychain event listeners (for cache invalidation)
 775 #endif
 776
 777     /* We're ready now. Go. */
 778     trustd_xpc_init(serviceName);
 779     dispatch_main();
 780 }