OSX/sec/Security/Regressions/secitem/si_77_SecAccessControl.c

   1 /*
   2  * Copyright (c) 2014 Apple Inc. All Rights Reserved.
   3  *
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   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
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  20  *
  21  * @APPLE_LICENSE_HEADER_END@
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  23
  24
  25 #include <Security/SecItem.h>
  26 #include <Security/SecItemPriv.h>
  27 #include <Security/SecAccessControl.h>
  28 #include <Security/SecAccessControlPriv.h>
  29 #include <Security/SecInternal.h>
  30 #include <utilities/SecCFWrappers.h>
  31 #include <utilities/SecAKSWrappers.h>
  32 #include <utilities/array_size.h>
  33 #include <utilities/der_plist.h>
  34 #include <libaks_acl_cf_keys.h>
  35 #include <ACMDefs.h>
  36 #include <ACMAclDefs.h>
  37
  38 #if TARGET_HAS_KEYSTORE
  39 #include <Security/SecRandom.h>
  40 #include "keychain/securityd/SecDbItem.h"
  41 #include <coreauthd_spi.h>
  42 #include <corecrypto/ccder.h>
  43 #endif /* TARGET_HAS_KEYSTORE */
  44
  45 #include "Security_regressions.h"
  46
  47 #if LA_CONTEXT_IMPLEMENTED && TARGET_HAS_KEYSTORE
  48 static bool aks_consistency_test(bool currentAuthDataFormat, kern_return_t expectedAksResult, SecAccessControlRef access_control, CFDataRef acm_context);
  49 static CFDataRef kc_create_auth_data(SecAccessControlRef access_control, CFDictionaryRef auth_attributes);
  50 static CFDataRef kc_copy_constraints_data(SecAccessControlRef access_control, CFDictionaryRef auth_attributes);
  51 static int aks_crypt_acl(CFTypeRef operation, keybag_handle_t keybag,
  52                                    keyclass_t keyclass, uint32_t textLength, const uint8_t *source,
  53                                    CFMutableDataRef dest, CFDataRef auth_data, CFDataRef acm_context, CFDataRef caller_access_groups);
  54 #endif
  55
  56 static void tests(void)
  57 {
  58     CFAllocatorRef allocator = kCFAllocatorDefault;
  59     CFTypeRef protection = kSecAttrAccessibleAlwaysPrivate;
  60     CFErrorRef error = NULL;
  61
  62     // Simple API tests:
  63
  64     // ACL with protection only
  65     SecAccessControlRef acl = SecAccessControlCreateWithFlags(allocator, protection, 0, &error);
  66     ok(acl != NULL, "SecAccessControlCreateWithFlags: %@", error);
  67     CFReleaseNull(error);
  68     CFReleaseNull(acl);
  69
  70     // ACL with flags only (not allowed)
  71 #pragma clang diagnostic push
  72 #pragma clang diagnostic ignored "-Wnonnull"
  73     // NULL passed as 'protection' newly generates a warning, we need to suppress it in order to compile
  74     acl = SecAccessControlCreateWithFlags(allocator, NULL, kSecAccessControlUserPresence, &error);
  75 #pragma clang diagnostic pop
  76     ok(acl == NULL, "SecAccessControlCreateWithFlags");
  77     CFReleaseNull(error);
  78     CFReleaseNull(acl);
  79
  80     // ACL with protection and kSecAccessControlBiometryCurrentSet
  81     acl = SecAccessControlCreateWithFlags(allocator, protection, kSecAccessControlBiometryCurrentSet, &error);
  82     ok(acl != NULL, "SecAccessControlCreateWithFlags: %@", error);
  83     CFReleaseNull(error);
  84     CFReleaseNull(acl);
  85
  86     // ACL with protection and flags
  87     acl = SecAccessControlCreateWithFlags(allocator, protection, kSecAccessControlBiometryAny | kSecAccessControlDevicePasscode | kSecAccessControlOr, &error);
  88     ok(acl != NULL, "SecAccessControlCreateWithFlags: %@", error);
  89     CFReleaseNull(error);
  90     CFReleaseNull(acl);
  91
  92     // ACL with protection and flags
  93     acl = SecAccessControlCreateWithFlags(allocator, protection, kSecAccessControlBiometryAny | kSecAccessControlDevicePasscode | kSecAccessControlAnd, &error);
  94     ok(acl != NULL, "SecAccessControlCreateWithFlags: %@", error);
  95     CFReleaseNull(error);
  96     CFReleaseNull(acl);
  97
  98     // ACL with protection and flags
  99 #if TARGET_OS_OSX
 100     acl = SecAccessControlCreateWithFlags(allocator, protection, kSecAccessControlBiometryAny | kSecAccessControlDevicePasscode | kSecAccessControlWatch | kSecAccessControlAnd | kSecAccessControlApplicationPassword, &error);
 101 #else
 102     acl = SecAccessControlCreateWithFlags(allocator, protection, kSecAccessControlBiometryAny | kSecAccessControlDevicePasscode | kSecAccessControlAnd | kSecAccessControlApplicationPassword, &error);
 103 #endif
 104     ok(acl != NULL, "SecAccessControlCreateWithFlags: %@", error);
 105     CFReleaseNull(error);
 106     CFReleaseNull(acl);
 107
 108     // ACL with protection and kSecAccessControlApplicationPassword
 109     acl = SecAccessControlCreateWithFlags(allocator, protection, kSecAccessControlApplicationPassword, &error);
 110     ok(acl != NULL, "SecAccessControlCreateWithFlags: %@", error);
 111     CFReleaseNull(error);
 112     CFReleaseNull(acl);
 113
 114     // ACL with protection and, kSecAccessControlUserPresence can be in combination with kSecAccessControlApplicationPassword and kSecAccessControlPrivateKeyUsage
 115     acl = SecAccessControlCreateWithFlags(allocator, protection, kSecAccessControlUserPresence | kSecAccessControlApplicationPassword | kSecAccessControlPrivateKeyUsage, &error);
 116     ok(acl != NULL, "SecAccessControlCreateWithFlags: %@", error);
 117     CFReleaseNull(error);
 118     CFReleaseNull(acl);
 119
 120     // negative test of ACL with protection and, kSecAccessControlUserPresence can be in combination with kSecAccessControlApplicationPassword and kSecAccessControlPrivateKeyUsage
 121     acl = SecAccessControlCreateWithFlags(allocator, protection, kSecAccessControlUserPresence | kSecAccessControlBiometryAny, &error);
 122     ok(acl == NULL, "SecAccessControlCreateWithFlag wrong combination of flags");
 123     CFReleaseNull(error);
 124     CFReleaseNull(acl);
 125
 126     // ACL with protection and flags
 127     acl = SecAccessControlCreateWithFlags(allocator, protection, kSecAccessControlUserPresence, &error);
 128     ok(acl != NULL, "SecAccessControlCreateWithFlags: %@", error);
 129     CFReleaseNull(error);
 130
 131     // Extended API tests:
 132
 133     // Check created ACL
 134     CFTypeRef aclProtection = SecAccessControlGetProtection(acl);
 135     is(aclProtection, protection, "SecAccessControlGetProtection");
 136
 137     SecAccessConstraintRef aclConstraint = SecAccessControlGetConstraint(acl, kAKSKeyOpDecrypt);
 138     // Check created ACL
 139     ok(aclConstraint != NULL && isDictionary(aclConstraint), "SecAccessControlGetConstraint");
 140     eq_cf(CFDictionaryGetValue(aclConstraint, CFSTR(kACMKeyAclConstraintPolicy)), CFSTR(kACMPolicyDeviceOwnerAuthentication), "SecAccessControlGetConstraint");
 141
 142     CFReleaseNull(acl);
 143
 144     // Simple SPI tests:
 145
 146     // Empty ACL
 147     acl = SecAccessControlCreate(allocator, &error);
 148     ok(acl != NULL, "SecAccessControlCreate: %@", error);
 149     CFReleaseNull(error);
 150
 151     // ACL protection
 152     bool result = SecAccessControlSetProtection(acl, protection, &error);
 153     ok(result, "SecAccessControlSetProtection: %@", error);
 154     CFReleaseNull(error);
 155
 156     aclProtection = SecAccessControlGetProtection(acl);
 157     // ACL protection
 158     is(aclProtection, protection, "SecAccessControlGetProtection");
 159
 160     // Policy constraint
 161     SecAccessConstraintRef policy = SecAccessConstraintCreatePolicy(allocator, CFSTR(kACMPolicyDeviceOwnerAuthentication), &error);
 162     ok(policy != NULL, "SecAccessConstraintCreatePolicy: %@", error);
 163     ok(isDictionary(policy), "SecAccessConstraintCreatePolicy");
 164     is(CFDictionaryGetValue(policy, CFSTR(kACMKeyAclConstraintPolicy)), CFSTR(kACMPolicyDeviceOwnerAuthentication), "SecAccessConstraintCreatePolicy");
 165     CFReleaseNull(error);
 166     CFReleaseNull(policy);
 167
 168     // Watch constraint
 169     aclConstraint = SecAccessConstraintCreateWatch(allocator);
 170     ok(aclConstraint != NULL && isDictionary(aclConstraint), "SecAccessConstraintCreateWatch");
 171     is(CFDictionaryGetValue(aclConstraint, CFSTR(kACMKeyAclConstraintWatch)), kCFBooleanTrue, "SecAccessConstraintCreateWatch");
 172     CFReleaseNull(aclConstraint);
 173
 174     // Passcode constraint
 175     SecAccessConstraintRef passcode = SecAccessConstraintCreatePasscode(allocator);
 176     ok(passcode != NULL && isDictionary(passcode), "SecAccessConstraintCreatePasscode");
 177     is(CFDictionaryGetValue(passcode, CFSTR(kACMKeyAclConstraintUserPasscode)), kCFBooleanTrue, "SecAccessConstraintCreatePasscode");
 178 //    CFReleaseNull(passcode); passcode will be used in later tests
 179
 180     CFUUIDRef uuid = CFUUIDCreate(allocator);
 181     CFStringRef uuidString = CFUUIDCreateString(allocator, uuid);
 182     CFDataRef uuidData = CFStringCreateExternalRepresentation(allocator, uuidString, kCFStringEncodingUTF8, 0);
 183     SecAccessConstraintRef biometry = SecAccessConstraintCreateBiometryCurrentSet(allocator, uuidData, uuidData);
 184     // Biometry constraint
 185     ok(biometry != NULL, "SecAccessConstraintCreateBiometry: %@", error);
 186     ok(isDictionary(biometry), "SecAccessConstraintCreateBiometry");
 187     ok(CFDictionaryGetValue(biometry, CFSTR(kACMKeyAclConstraintBio)), "SecAccessConstraintCreateBiometry");
 188     CFDictionaryRef bioRef = CFDictionaryGetValue(biometry, CFSTR(kACMKeyAclConstraintBio));
 189     ok(isDictionary(bioRef), "SecAccessConstraintCreateBiometry");
 190     is(CFDictionaryGetValue(bioRef, CFSTR(kACMKeyAclParamBioCatacombUUID)), uuidData, "SecAccessConstraintCreateBiometry");
 191     is(CFDictionaryGetValue(bioRef, CFSTR(kACMKeyAclParamBioDatabaseHash)), uuidData, "SecAccessConstraintCreateBiometry");
 192     CFReleaseNull(error);
 193     CFReleaseNull(biometry);
 194     CFReleaseNull(uuidData);
 195     CFReleaseNull(uuidString);
 196     CFReleaseNull(uuid);
 197
 198     uuid = CFUUIDCreate(allocator);
 199     uuidString = CFUUIDCreateString(allocator, uuid);
 200     uuidData = CFStringCreateExternalRepresentation(allocator, uuidString, kCFStringEncodingUTF8, 0);
 201     biometry = SecAccessConstraintCreateBiometryAny(allocator, uuidData);
 202     // Biometry constraint
 203     ok(biometry != NULL, "SecAccessConstraintCreateBiometry: %@", error);
 204     ok(isDictionary(biometry), "SecAccessConstraintCreateBiometry");
 205     ok(CFDictionaryGetValue(biometry, CFSTR(kACMKeyAclConstraintBio)), "SecAccessConstraintCreateBiometry");
 206     bioRef = CFDictionaryGetValue(biometry, CFSTR(kACMKeyAclConstraintBio));
 207     ok(isDictionary(bioRef), "SecAccessConstraintCreateBiometry");
 208     is(CFDictionaryGetValue(bioRef, CFSTR(kACMKeyAclParamBioCatacombUUID)), uuidData, "SecAccessConstraintCreateBiometry");
 209     CFReleaseNull(error);
 210     // CFReleaseNull(biometry); biometry will be used in later tests
 211     CFReleaseNull(uuidData);
 212     CFReleaseNull(uuidString);
 213     CFReleaseNull(uuid);
 214
 215     // KofN constraint
 216     CFTypeRef constraints_array[] = { passcode, biometry };
 217     CFArrayRef constraintsArray = CFArrayCreate(allocator, constraints_array, array_size(constraints_array), &kCFTypeArrayCallBacks);
 218     SecAccessConstraintRef kofn = SecAccessConstraintCreateKofN(allocator, 1, constraintsArray, &error);
 219     ok(kofn != NULL, "SecAccessConstraintCreateKofN: %@", error);
 220     ok(isDictionary(kofn), "SecAccessConstraintCreateKofN");
 221     CFTypeRef kofnConstraint = CFDictionaryGetValue(kofn, CFSTR(kACMKeyAclConstraintKofN));
 222     ok(kofnConstraint != NULL && isDictionary(kofnConstraint), "SecAccessConstraintCreateKofN");
 223     CFNumberRef required = CFNumberCreateWithCFIndex(allocator, 1);
 224     is(CFDictionaryGetValue(kofnConstraint, CFSTR(kACMKeyAclParamKofN)), required, "SecAccessConstraintCreateKofN");
 225     ok(CFDictionaryGetValue(kofnConstraint, CFSTR(kACMKeyAclConstraintBio)), "SecAccessConstraintCreateKofN");
 226     is(CFDictionaryGetValue(kofnConstraint, CFSTR(kACMKeyAclConstraintUserPasscode)), kCFBooleanTrue, "SecAccessConstraintCreateKofN");
 227     CFReleaseNull(error);
 228     CFReleaseNull(kofn);
 229     CFReleaseNull(required);
 230     CFReleaseNull(constraintsArray);
 231     CFReleaseNull(passcode);
 232
 233     // Add ACL constraint for operation
 234     result = SecAccessControlAddConstraintForOperation(acl, kAKSKeyOpDecrypt, biometry, &error);
 235     ok(result, "SecAccessControlAddConstraintForOperation: %@", error);
 236     CFReleaseNull(error);
 237
 238     // Get ACL operation constraint
 239     SecAccessConstraintRef constraint = SecAccessControlGetConstraint(acl, kAKSKeyOpDecrypt);
 240     is(constraint, biometry, "SecAccessControlGetConstraint");
 241     CFReleaseNull(biometry);
 242
 243     // Add ACL constraint for operation (kCFBooleanTrue)
 244     result = SecAccessControlAddConstraintForOperation(acl, kAKSKeyOpDecrypt, kCFBooleanTrue, &error);
 245     ok(result, "SecAccessControlAddConstraintForOperation: %@", error);
 246     CFReleaseNull(error);
 247
 248     // Get ACL operation constraint (kCFBooleanTrue)
 249     constraint = SecAccessControlGetConstraint(acl, kAKSKeyOpDecrypt);
 250     is(constraint, kCFBooleanTrue, "SecAccessControlGetConstraint");
 251
 252     // Get ACL constraints
 253     CFDictionaryRef constraints = SecAccessControlGetConstraints(acl);
 254     ok(constraints != NULL && isDictionary(constraints), "SecAccessControlGetConstraints");
 255     // Get ACL constraints
 256     is(CFDictionaryGetValue(constraints, kAKSKeyOpDecrypt), kCFBooleanTrue, "SecAccessControlGetConstraints");
 257
 258     // ACL export and import
 259     CFDataRef aclData = SecAccessControlCopyData(acl);
 260     ok(aclData != NULL, "SecAccessControlCopyData");
 261     SecAccessControlRef aclCopy = SecAccessControlCreateFromData(allocator, aclData, &error);
 262     ok(aclCopy != NULL, "SecAccessControlCopyData: %@", error);
 263     ok(CFEqual(aclCopy, acl), "SecAccessControlCopyData");
 264     CFReleaseNull(error);
 265     CFReleaseNull(aclCopy);
 266     CFReleaseNull(aclData);
 267
 268     // Extended SPI tests:
 269
 270     // kAKSKeyDefaultOpAcl
 271     result = SecAccessControlAddConstraintForOperation(acl, kAKSKeyOpDefaultAcl, kCFBooleanTrue, &error);
 272     ok(result, "SecAccessControlAddConstraintForOperation: %@", error);
 273     constraint = SecAccessControlGetConstraint(acl, kAKSKeyOpDecrypt);
 274     is(constraint, kCFBooleanTrue, "SecAccessControlRemoveConstraintForOperation");
 275     CFReleaseNull(error);
 276
 277     CFReleaseNull(acl);
 278
 279 #if LA_CONTEXT_IMPLEMENTED && TARGET_HAS_KEYSTORE
 280     // AKS consistency test:
 281
 282     acl = SecAccessControlCreateWithFlags(allocator, protection, kSecAccessControlUserPresence, &error);
 283     ok(acl != NULL, "SecAccessControlCreateWithFlags: %@", error);
 284     CFReleaseNull(error);
 285
 286     SKIP: {
 287         skip("SecAccessControlCreateWithFlags failed", 7, acl != NULL);
 288
 289         CFDataRef acm_context = NULL;
 290         CFTypeRef auth_handle = NULL;
 291
 292         auth_handle = LACreateNewContextWithACMContext(NULL, &error);
 293         ok(auth_handle != NULL, "LACreateNewContextWithACMContext: %@", error);
 294         CFReleaseNull(error);
 295
 296         SKIP: {
 297             skip("LACreateNewContextWithACMContext failed", 6, auth_handle != NULL);
 298
 299             acm_context = LACopyACMContext(auth_handle, &error);
 300             ok(acm_context != NULL, "LACopyACMContext: %@", error);
 301             CFReleaseNull(error);
 302
 303             CFReleaseNull(auth_handle);
 304
 305             SKIP: {
 306                 skip("LACopyACMContext failed", 5, acm_context != NULL);
 307
 308                 ok(aks_consistency_test(true, kAKSReturnPolicyError, acl, acm_context), "AKS consistency negative test (current auth_data format)");
 309                 ok(aks_consistency_test(false, kAKSReturnPolicyError, acl, acm_context), "AKS consistency negative test (old auth_data format)");
 310
 311                 bool decrypt_enabled = false;
 312                 CFDictionaryRef constraints = SecAccessControlGetConstraints(acl);
 313                 if (constraints) {
 314                     CFMutableDictionaryRef new_constraints = CFDictionaryCreateMutableCopy(NULL, 0, constraints);
 315                     if (new_constraints) {
 316                         CFDictionarySetValue(new_constraints, kAKSKeyOpDecrypt, kCFBooleanTrue);
 317                         SecAccessControlSetConstraints(acl, new_constraints);
 318                         CFReleaseSafe(new_constraints);
 319                         decrypt_enabled = true;
 320                     }
 321                 }
 322                 ok(decrypt_enabled, "Cannot enable decrypt operation for AKS consistency positive tests");
 323
 324                 ok(aks_consistency_test(true, kAKSReturnSuccess, acl, acm_context), "AKS consistency positive test (current auth_data format)");
 325                 ok(aks_consistency_test(false, kAKSReturnSuccess, acl, acm_context), "AKS consistency positive test (old auth_data format)");
 326
 327                 CFReleaseNull(acm_context);
 328             }
 329         }
 330
 331         CFReleaseNull(acl);
 332     }
 333 #endif
 334
 335     // kSecAccessControlPrivateKeyUsage
 336     acl = SecAccessControlCreateWithFlags(kCFAllocatorDefault, protection, kSecAccessControlPrivateKeyUsage | kSecAccessControlDevicePasscode, NULL);
 337     ok(acl, "kSecAccessControlPrivateKeyUsage ACL create with constraint");
 338     ok(!SecAccessControlGetConstraint(acl, kAKSKeyOpEncrypt), "kAKSKeyOpEncrypt constraint");
 339     ok(!SecAccessControlGetConstraint(acl, kAKSKeyOpDecrypt), "kAKSKeyOpDecrypt constraint");
 340     ok(constraint = SecAccessControlGetConstraint(acl, kAKSKeyOpDelete), "kAKSKeyOpDelete constraint");
 341     is(constraint, kCFBooleanTrue, "kAKSKeyOpDelete constraint value");
 342     ok(constraint = SecAccessControlGetConstraint(acl, kAKSKeyOpSign), "kAKSKeyOpSign constraint");
 343     ok(constraint && isDictionary(constraint), "kAKSKeyOpSign constraint value");
 344     CFReleaseNull(acl);
 345
 346     acl = SecAccessControlCreateWithFlags(kCFAllocatorDefault, protection, kSecAccessControlPrivateKeyUsage, NULL);
 347     ok(acl, "kSecAccessControlPrivateKeyUsage ACL create without constraint");
 348     ok(!SecAccessControlGetConstraint(acl, kAKSKeyOpEncrypt), "kAKSKeyOpEncrypt constraint");
 349     ok(!SecAccessControlGetConstraint(acl, kAKSKeyOpDecrypt), "kAKSKeyOpDecrypt constraint");
 350     ok(constraint = SecAccessControlGetConstraint(acl, kAKSKeyOpDelete), "kAKSKeyOpDelete constraint");
 351     is(constraint, kCFBooleanTrue, "kAKSKeyOpDelete constraint value");
 352     ok(constraint = SecAccessControlGetConstraint(acl, kAKSKeyOpSign), "kAKSKeyOpSign constraint");
 353     is(constraint, kCFBooleanTrue, "kAKSKeyOpSign constraint value");
 354     CFReleaseNull(acl);
 355 }
 356
 357 #if LA_CONTEXT_IMPLEMENTED && TARGET_HAS_KEYSTORE
 358
 359 static bool aks_consistency_test(bool currentAuthDataFormat, kern_return_t expectedAksResult, SecAccessControlRef access_control, CFDataRef acm_context)
 360 {
 361     bool result = false;
 362
 363     const uint32_t bulkKeySize = 32;
 364     const uint32_t maxKeyWrapOverHead = 8 + 32;
 365     uint8_t bulkKey[bulkKeySize];
 366     CFMutableDataRef bulkKeyWrapped = CFDataCreateMutable(NULL, 0);
 367     CFDataSetLength(bulkKeyWrapped, bulkKeySize + maxKeyWrapOverHead);
 368     CFMutableDataRef bulkKeyUnwrapped = CFDataCreateMutable(NULL, 0);
 369     CFDataSetLength(bulkKeyUnwrapped, bulkKeySize);
 370
 371     CFDataRef auth_data = NULL;
 372     CFMutableDictionaryRef auth_attribs = NULL;
 373
 374     OSStatus status = SecRandomCopyBytes(kSecRandomDefault, bulkKeySize, bulkKey);
 375     ok_status(status, "SecRandomCopyBytes failed");
 376     require_noerr(status, out);
 377
 378     auth_attribs = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
 379     if (currentAuthDataFormat) {
 380         auth_data = kc_create_auth_data(access_control, auth_attribs);
 381     }
 382     else {
 383         auth_data = kc_copy_constraints_data(access_control, auth_attribs);
 384     }
 385
 386     status = aks_crypt_acl(kAKSKeyOpEncrypt, KEYBAG_DEVICE, key_class_dk, bulkKeySize, bulkKey, bulkKeyWrapped, auth_data, acm_context, NULL);
 387     is_status(status, kAKSReturnSuccess, "kAKSKeyOpEncrypt failed");
 388     require(status == kAKSReturnSuccess, out);
 389
 390     uint32_t blobLenWrapped = (uint32_t)CFDataGetLength(bulkKeyWrapped);
 391     const uint8_t *cursor = CFDataGetBytePtr(bulkKeyWrapped);
 392
 393     status = aks_crypt_acl(kAKSKeyOpDecrypt, KEYBAG_DEVICE, key_class_dk, blobLenWrapped, cursor, bulkKeyUnwrapped, auth_data, acm_context, NULL);
 394     is_status(status, expectedAksResult, "kAKSKeyOpDecrypt finished with unexpected result");
 395     require(status == expectedAksResult, out);
 396
 397     result = true;
 398
 399 out:
 400     CFReleaseSafe(bulkKeyUnwrapped);
 401     CFReleaseSafe(bulkKeyWrapped);
 402     CFReleaseSafe(auth_data);
 403     CFReleaseSafe(auth_attribs);
 404
 405     return result;
 406 }
 407
 408 static bool merge_der_in_to_data(const void *der1, size_t der1_len, const void *der2, size_t der2_len, CFMutableDataRef mergedData)
 409 {
 410     bool result = false;
 411     CFPropertyListRef dict1 = NULL;
 412     CFPropertyListRef dict2 = NULL;
 413
 414     der_decode_plist(NULL, &dict1, NULL, der1, der1 + der1_len);
 415     der_decode_plist(NULL, &dict2, NULL, der2, der2 + der2_len);
 416     if (dict1 && dict2) {
 417         CFMutableDictionaryRef result_dict = CFDictionaryCreateMutableCopy(kCFAllocatorDefault, 0, dict1);
 418         CFDictionaryForEach(dict2, ^(const void *key, const void *value) {
 419             CFDictionaryAddValue(result_dict, key, value);
 420         });
 421
 422         CFDataSetLength(mergedData, 0);
 423         CFDataRef der_data = CFPropertyListCreateDERData(kCFAllocatorDefault, result_dict, NULL);
 424         if (der_data) {
 425             CFDataAppend(mergedData, der_data);
 426             CFRelease(der_data);
 427             result = CFDataGetLength(mergedData) > 0;
 428         }
 429         CFRelease(result_dict);
 430     }
 431
 432     CFReleaseSafe(dict1);
 433     CFReleaseSafe(dict2);
 434     return result;
 435 }
 436
 437 static int aks_crypt_acl(CFTypeRef operation, keybag_handle_t keybag,
 438                                    keyclass_t keyclass, uint32_t textLength, const uint8_t *source,
 439                                    CFMutableDataRef dest, CFDataRef auth_data, CFDataRef acm_context, CFDataRef caller_access_groups)
 440 {
 441     int aks_return = kAKSReturnSuccess;
 442     void *params = NULL, *der = NULL;
 443     const uint8_t *access_groups = caller_access_groups?CFDataGetBytePtr(caller_access_groups):NULL;
 444     size_t params_len = 0, der_len = 0, access_groups_len = caller_access_groups?CFDataGetLength(caller_access_groups):0;
 445     aks_ref_key_t key_handle = NULL;
 446
 447     if (CFEqual(operation, kAKSKeyOpEncrypt)) {
 448         aks_operation_optional_params(0, 0, CFDataGetBytePtr(auth_data), CFDataGetLength(auth_data),
 449                                       CFDataGetBytePtr(acm_context), (int)CFDataGetLength(acm_context), &params, &params_len);
 450
 451         require_noerr_quiet(aks_return = aks_ref_key_create(keybag, keyclass, key_type_sym, params, params_len, &key_handle), out);
 452         require_noerr_quiet(aks_return = aks_ref_key_encrypt(key_handle, params, params_len, source, textLength, &der, &der_len), out);
 453         size_t key_blob_len;
 454         const void *key_blob = aks_ref_key_get_blob(key_handle, &key_blob_len);
 455         require_action_string(key_blob, out, aks_return = kAKSReturnError, "aks_ref_key_get_blob failed");
 456         require_action_string(merge_der_in_to_data(der, der_len, key_blob, key_blob_len, dest), out, aks_return = kAKSReturnError, "merge_der_in_to_data failed");
 457
 458     } else if (CFEqual(operation, kAKSKeyOpDecrypt)) {
 459         aks_operation_optional_params(access_groups, access_groups_len, 0, 0,
 460                                       CFDataGetBytePtr(acm_context), (int)CFDataGetLength(acm_context), (void**)&params, &params_len);
 461         require_noerr_quiet(aks_return = aks_ref_key_create_with_blob(keybag, source, textLength, &key_handle), out);
 462         require_noerr_quiet(aks_return = aks_ref_key_decrypt(key_handle, params, params_len, source, textLength, &der, &der_len), out);
 463         require_action_string(der, out, aks_return = kAKSReturnError, "aks_ref_key_decrypt failed");
 464
 465         CFPropertyListRef decoded_data = NULL;
 466         der_decode_plist(kCFAllocatorDefault, &decoded_data, NULL, der, der + der_len);
 467         require_action_string(decoded_data, out, aks_return = kAKSReturnError, "der_decode_plist failed");
 468         if (CFGetTypeID(decoded_data) == CFDataGetTypeID()) {
 469             CFDataSetLength(dest, 0);
 470             CFDataAppend(dest, decoded_data);
 471             CFRelease(decoded_data);
 472         }
 473         else {
 474             CFRelease(decoded_data);
 475             require_action_string(false, out, aks_return = kAKSReturnError, "wrong decoded data type");
 476         }
 477     }
 478
 479 out:
 480     if (key_handle) {
 481         aks_ref_key_free(&key_handle);
 482     }
 483     if (params) {
 484         free(params);
 485     }
 486     if (der) {
 487         free(der);
 488     }
 489     return aks_return;
 490 }
 491
 492 static CFDataRef kc_create_auth_data(SecAccessControlRef access_control, CFDictionaryRef auth_attributes)
 493 {
 494     CFDictionaryRef constraints = SecAccessControlGetConstraints(access_control);
 495     CFMutableDictionaryRef auth_data = CFDictionaryCreateMutableCopy(NULL, 0, auth_attributes);
 496     CFDictionarySetValue(auth_data, kAKSKeyAcl, constraints);
 497     CFDataRef encoded = CFPropertyListCreateDERData(kCFAllocatorDefault, auth_data, NULL);
 498     CFReleaseSafe(auth_data);
 499     return encoded;
 500 }
 501
 502 static CFDataRef kc_copy_constraints_data(SecAccessControlRef access_control, CFDictionaryRef auth_attributes)
 503 {
 504     CFDictionaryRef constraints = SecAccessControlGetConstraints(access_control);
 505     CFMutableDictionaryRef auth_data = CFDictionaryCreateMutableCopy(NULL, 0, constraints);
 506     if (auth_attributes) {
 507         CFDictionaryForEach(auth_attributes, ^(const void *key, const void *value) {
 508             CFDictionaryAddValue(auth_data, key, value);
 509         });
 510     }
 511
 512     CFDataRef encoded = CFPropertyListCreateDERData(kCFAllocatorDefault, auth_data, NULL);
 513     CFReleaseSafe(auth_data);
 514     return encoded;
 515 }
 516
 517 #endif
 518
 519 int si_77_SecAccessControl(int argc, char *const *argv)
 520 {
 521 #if LA_CONTEXT_IMPLEMENTED && TARGET_HAS_KEYSTORE
 522     plan_tests(73);
 523 #else
 524     plan_tests(65);
 525 #endif
 526
 527     tests();
 528
 529     return 0;
 530 }