tests/TrustTests/EvaluationTests/TrustEvaluationTestCase.m

   1 /*
   2  * Copyright (c) 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 #import <XCTest/XCTest.h>
  25 #include "trust/trustd/trustd_spi.h"
  26 #include "trust/trustd/SecRevocationDb.h"
  27 #include <Security/SecCertificatePriv.h>
  28 #include <Security/SecTrustPriv.h>
  29 #include <Security/SecPolicy.h>
  30 #include <Security/SecTrustSettings.h>
  31 #include <Security/SecTrustSettingsPriv.h>
  32 #include "OSX/utilities/SecCFWrappers.h"
  33 #include <dispatch/dispatch.h>
  34 #include <dlfcn.h>
  35
  36 #if TARGET_OS_IPHONE
  37 #include <Security/SecTrustStore.h>
  38 #else
  39 #define kSystemLoginKeychainPath "/Library/Keychains/System.keychain"
  40 #include <Security/SecKeychain.h>
  41 #endif
  42
  43 #import "../TestMacroConversions.h"
  44 #import "TrustEvaluationTestCase.h"
  45
  46 @implementation TrustEvaluationTestCase
  47
  48 static int current_dir = -1;
  49 static char *home_var = NULL;
  50
  51 /* Build in trustd functionality to the tests */
  52 + (void) setUp {
  53     /* Set up TMP directory for trustd's files */
  54     int ok = 0;
  55     NSError* error = nil;
  56     NSString* pid = [NSString stringWithFormat: @"tst-%d", [[NSProcessInfo processInfo] processIdentifier]];
  57     NSURL* tmpDirURL = [[NSURL fileURLWithPath:NSTemporaryDirectory() isDirectory:YES] URLByAppendingPathComponent:pid];
  58     ok = (bool)tmpDirURL;
  59
  60     if (current_dir == -1 && home_var == NULL) {
  61         ok = ok && [[NSFileManager defaultManager] createDirectoryAtURL:tmpDirURL
  62                                             withIntermediateDirectories:NO
  63                                                              attributes:NULL
  64                                                                   error:&error];
  65
  66         NSURL* libraryURL = [tmpDirURL URLByAppendingPathComponent:@"Library"];
  67         NSURL* preferencesURL = [tmpDirURL URLByAppendingPathComponent:@"Preferences"];
  68
  69         ok =  (ok && (current_dir = open(".", O_RDONLY) >= 0)
  70                && (chdir([tmpDirURL fileSystemRepresentation]) >= 0)
  71                && (setenv("HOME", [tmpDirURL fileSystemRepresentation], 1) >= 0)
  72                && (bool)(home_var = getenv("HOME")));
  73
  74         ok = ok && [[NSFileManager defaultManager] createDirectoryAtURL:libraryURL
  75                                             withIntermediateDirectories:NO
  76                                                              attributes:NULL
  77                                                                   error:&error];
  78
  79         ok = ok && [[NSFileManager defaultManager] createDirectoryAtURL:preferencesURL
  80                                             withIntermediateDirectories:NO
  81                                                              attributes:NULL
  82                                                                   error:&error];
  83     }
  84
  85     /* Use the production Valid DB by default (so we'll have data to test against) */
  86     CFPreferencesSetAppValue(CFSTR("ValidUpdateServer"), kValidUpdateProdServer, kSecurityPreferencesDomain);
  87     CFPreferencesAppSynchronize(kSecurityPreferencesDomain);
  88
  89     if (ok > 0) {
  90         /* Be trustd */
  91         trustd_init((__bridge CFURLRef) tmpDirURL);
  92     }
  93 }
  94
  95 - (id)addTrustSettingsForCert:(SecCertificateRef)cert trustSettings:(id)trustSettings
  96 {
  97 #if TARGET_OS_IPHONE
  98     SecTrustStoreRef defaultStore = SecTrustStoreForDomain(kSecTrustStoreDomainUser);
  99     OSStatus status = SecTrustStoreSetTrustSettings(defaultStore, cert, (__bridge CFTypeRef)trustSettings);
 100     XCTAssert(errSecSuccess == status, "failed to set trust settings: %d", (int)status);
 101     return nil;
 102 #else
 103     /* Since we're putting trust settings in the admin domain,
 104      * we need to add the certs to the system keychain. */
 105     SecKeychainRef kcRef = NULL;
 106     CFArrayRef certRef = NULL;
 107     NSDictionary *attrs = nil;
 108
 109     SecKeychainOpen(kSystemLoginKeychainPath, &kcRef);
 110     if (!kcRef) {
 111         return nil;
 112     }
 113
 114     /* Since we're interacting with the keychain we need a framework cert */
 115     SecCertificateRef frameworkCert = SecFrameworkCertificateCreateFromTestCert(cert);
 116     attrs = @{(__bridge NSString*)kSecValueRef: (__bridge id)frameworkCert,
 117               (__bridge NSString*)kSecUseKeychain: (__bridge id)kcRef,
 118               (__bridge NSString*)kSecReturnPersistentRef: @YES};
 119     OSStatus status = SecItemAdd((CFDictionaryRef)attrs, (void *)&certRef);
 120     XCTAssert(errSecSuccess == status, "failed to add cert to keychain: %d", status);
 121     id result = ((__bridge NSArray*)certRef)[0];
 122     CFReleaseNull(kcRef);
 123     CFReleaseNull(certRef);
 124
 125     status = SecTrustSettingsSetTrustSettings(frameworkCert, kSecTrustSettingsDomainAdmin,
 126                                               (__bridge CFTypeRef)trustSettings);
 127     XCTAssert(errSecSuccess == status, "failed to set trust settings: %d", status);
 128     usleep(20000);
 129
 130     CFReleaseNull(frameworkCert);
 131     return result;
 132 #endif
 133 }
 134
 135
 136 - (id)addTrustSettingsForCert:(SecCertificateRef)cert
 137 {
 138     NSDictionary *trustSettings = @{ (__bridge NSString*)kSecTrustSettingsResult: @(kSecTrustSettingsResultTrustRoot)};
 139     Boolean isSelfSigned = false;
 140     XCTAssert(errSecSuccess == SecCertificateIsSelfSigned(cert, &isSelfSigned));
 141     if (!isSelfSigned) {
 142         trustSettings = @{ (__bridge NSString*)kSecTrustSettingsResult: @(kSecTrustSettingsResultTrustAsRoot)};
 143     }
 144
 145     return [self addTrustSettingsForCert:cert trustSettings:trustSettings];
 146 }
 147
 148 - (void)removeTrustSettingsForCert:(SecCertificateRef)cert persistentRef:(id)persistentRef
 149 {
 150 #if TARGET_OS_IPHONE
 151     SecTrustStoreRef defaultStore = SecTrustStoreForDomain(kSecTrustStoreDomainUser);
 152     XCTAssert(errSecSuccess == SecTrustStoreRemoveCertificate(defaultStore, cert), "failed to remove trust settings");
 153 #else
 154     SecCertificateRef frameworkCert = SecFrameworkCertificateCreateFromTestCert(cert);
 155     XCTAssert(errSecSuccess == SecTrustSettingsRemoveTrustSettings(frameworkCert, kSecTrustSettingsDomainAdmin),
 156               "failed to remove trust settings");
 157     XCTAssert(errSecSuccess == SecItemDelete((CFDictionaryRef)@{ (__bridge NSString*)kSecValuePersistentRef: persistentRef}),
 158               "failed to remove item from keychain");
 159     CFReleaseNull(frameworkCert);
 160 #endif
 161 }
 162
 163 const CFStringRef kSecurityPreferencesDomain = CFSTR("com.apple.security");
 164 const CFStringRef kTestSystemRootKey = CFSTR("TestSystemRoot");
 165
 166 - (void)setTestRootAsSystem:(const uint8_t *)sha256hash
 167 {
 168     NSData *rootHash = [NSData dataWithBytes:sha256hash length:32];
 169     CFPreferencesSetAppValue(kTestSystemRootKey, (__bridge CFDataRef)rootHash, kSecurityPreferencesDomain);
 170     CFPreferencesAppSynchronize(kSecurityPreferencesDomain);
 171 }
 172
 173 - (void)removeTestRootAsSystem
 174 {
 175     CFPreferencesSetAppValue(kTestSystemRootKey, NULL, kSecurityPreferencesDomain);
 176     CFPreferencesAppSynchronize(kSecurityPreferencesDomain);
 177 }
 178
 179 - (id _Nullable) CF_RETURNS_RETAINED SecCertificateCreateFromResource:(NSString *)name
 180                                                          subdirectory:(NSString *)dir
 181 {
 182     NSURL *url = [[NSBundle bundleForClass:[self class]] URLForResource:name withExtension:@".cer"
 183                                                            subdirectory:dir];
 184     NSData *certData = [NSData dataWithContentsOfURL:url];
 185     if (!certData) {
 186         return nil;
 187     }
 188     SecCertificateRef cert = SecCertificateCreateWithData(kCFAllocatorDefault, (__bridge CFDataRef)certData);
 189     return (__bridge id)cert;
 190 }
 191
 192 - (id _Nullable) CF_RETURNS_RETAINED SecCertificateCreateFromPEMResource:(NSString *)name
 193                                                             subdirectory:(NSString *)dir
 194 {
 195     NSURL *url = [[NSBundle bundleForClass:[self class]] URLForResource:name withExtension:@".pem"
 196                                                            subdirectory:dir];
 197     NSData *certData = [NSData dataWithContentsOfURL:url];
 198     if (!certData) {
 199         return nil;
 200     }
 201
 202     SecCertificateRef cert = SecCertificateCreateWithPEM(kCFAllocatorDefault, (__bridge CFDataRef)certData);
 203     return (__bridge id)cert;
 204 }
 205
 206 /* MARK: run test methods from regressionBase */
 207 - (void)runOneLeafTest:(SecPolicyRef)policy
 208                anchors:(NSArray *)anchors
 209          intermediates:(NSArray *)intermediates
 210               leafPath:(NSString *)path
 211         expectedResult:(bool)expectedResult
 212           expectations:(NSObject *)expectations
 213             verifyDate:(NSDate *)date
 214 {
 215     NSString* fileName = [path lastPathComponent];
 216     NSString *reason = NULL;
 217     SecTrustRef trustRef = NULL;
 218     NSMutableArray* certArray = NULL;
 219     SecCertificateRef certRef = NULL;
 220     CFErrorRef error = NULL;
 221
 222     if (expectations) {
 223         if ([expectations isKindOfClass: [NSString class]]) {
 224             reason = (NSString *)expectations;
 225         } else if ([expectations isKindOfClass: [NSDictionary class]]) {
 226             NSDictionary *dict = (NSDictionary *)expectations;
 227             NSObject *value = [dict valueForKey:@"valid"];
 228             if (value) {
 229                 if ([value isKindOfClass: [NSNumber class]]) {
 230                     expectedResult = [(NSNumber *)value boolValue];
 231                 } else {
 232                     NSLog(@"Unexpected valid value %@ in dict for key %@", value, fileName);
 233                 }
 234             }
 235             value = [dict valueForKey:@"reason"];
 236             if (value) {
 237                 if ([value isKindOfClass: [NSString class]]) {
 238                     reason = (NSString *)value;
 239                 } else {
 240                     NSLog(@"Unexpected reason value %@ in dict for key %@", value, fileName);
 241                 }
 242             }
 243         } else if ([expectations isKindOfClass: [NSNumber class]]) {
 244             expectedResult = [(NSNumber *)expectations boolValue];
 245         } else {
 246             NSLog(@"Unexpected class %@ value %@ for key %@", [expectations class], expectations, fileName);
 247         }
 248     }
 249
 250     certRef = SecCertificateCreateWithData(NULL, (CFDataRef)[NSData dataWithContentsOfFile:path]);
 251     if (!certRef) {
 252         if (reason) {
 253             fail("TODO test: %@ unable to create certificate, %@", fileName, reason);
 254         } else {
 255             fail("PARSE %@ unable to create certificate", fileName);
 256         }
 257         goto exit;
 258     }
 259
 260     certArray = [NSMutableArray arrayWithArray:intermediates];
 261     [certArray insertObject:(__bridge id)certRef atIndex:0]; //The certificate to be verified must be the first in the array.
 262
 263     OSStatus err;
 264     err = SecTrustCreateWithCertificates((__bridge CFTypeRef _Nonnull)(certArray), policy, &trustRef);
 265     if (err) {
 266         ok_status(err, "SecTrustCreateWithCertificates");
 267         goto exit;
 268     }
 269     if ([anchors count])
 270         SecTrustSetAnchorCertificates(trustRef, (CFArrayRef)anchors);
 271
 272     SecTrustSetVerifyDate(trustRef, (__bridge CFDateRef)date);
 273
 274     BOOL isValid = SecTrustEvaluateWithError(trustRef, &error);
 275     if (reason) {
 276         XCTAssertFalse(isValid == expectedResult, "TODO test: %@%@", fileName, error);
 277     } else {
 278         ok(isValid == expectedResult, "%s %@%@", expectedResult ? "REGRESSION" : "SECURITY", fileName, error);
 279     }
 280
 281 exit:
 282     CFReleaseSafe(trustRef);
 283     CFReleaseSafe(certRef);
 284     CFReleaseSafe(error);
 285 }
 286
 287 - (void)runCertificateTestFor:(SecPolicyRef)policy
 288                       anchors:(NSArray *)anchors
 289                 intermediates:(NSArray *)intermediates
 290                     leafPaths:(NSMutableArray *)leafPaths
 291                  expectations:(NSDictionary *)expect
 292                    verifyDate:(NSDate *)date
 293 {
 294     /* Sort the tests by name. */
 295     [leafPaths sortUsingSelector:@selector(compare:)];
 296
 297     for (NSString* path in leafPaths) {
 298         NSString* fileName = [path lastPathComponent];
 299         [self runOneLeafTest:policy anchors:anchors intermediates:intermediates leafPath:path expectedResult:![fileName hasPrefix:@"Invalid"] expectations:[expect objectForKey:fileName] verifyDate:date];
 300     }
 301 }
 302
 303
 304 - (void)runCertificateTestForDirectory:(SecPolicyRef)policy subDirectory:(NSString *)resourceSubDirectory verifyDate:(NSDate*)date
 305 {
 306     NSMutableArray* allRoots = [NSMutableArray array];
 307     NSMutableArray* allCAs = [NSMutableArray array];
 308     NSMutableArray* certTests = [NSMutableArray array];
 309     NSDictionary* expect = NULL;
 310
 311     NSURL* filesDirectory = [[[NSBundle bundleForClass:[self class]] resourceURL] URLByAppendingPathComponent:resourceSubDirectory];
 312     for (NSURL* fileURL in [[NSFileManager defaultManager] contentsOfDirectoryAtURL:filesDirectory includingPropertiesForKeys:[NSArray array] options:NSDirectoryEnumerationSkipsSubdirectoryDescendants error:nil]) {
 313         NSString* path = [fileURL path];
 314         if ([path hasSuffix:@"Cert.crt"]) {
 315             SecCertificateRef certRef = SecCertificateCreateWithData(NULL, (CFDataRef)[NSData dataWithContentsOfFile:path]);
 316             [allCAs addObject:(__bridge id)certRef];
 317             CFReleaseNull(certRef);
 318         } else if ([path hasSuffix:@"RootCertificate.crt"]) {
 319             SecCertificateRef certRef = SecCertificateCreateWithData(NULL, (CFDataRef)[NSData dataWithContentsOfFile:path]);
 320             [allRoots addObject:(__bridge id)certRef];
 321             CFReleaseNull(certRef);
 322         } else if ([path hasSuffix:@".crt"]) {
 323             [certTests addObject:path];
 324         } else if ([path hasSuffix:@".plist"]) {
 325             if (expect) {
 326                 fail("Multiple .plist files found in %@", filesDirectory);
 327             } else {
 328                 expect = [NSDictionary dictionaryWithContentsOfFile:path];
 329             }
 330         }
 331     }
 332
 333     [self runCertificateTestFor:policy anchors:allRoots intermediates:allCAs leafPaths:certTests expectations:expect verifyDate:date];
 334 }
 335
 336 @end
 337
 338 typedef SecCertificateRef (*create_f)(CFAllocatorRef allocator,
 339                            const UInt8 *der_bytes, CFIndex der_length);
 340 CF_RETURNS_RETAINED _Nullable
 341 SecCertificateRef SecFrameworkCertificateCreate(const uint8_t * _Nonnull der_bytes, CFIndex der_length) {
 342     static create_f FrameworkCertCreateFunctionPtr = NULL;
 343     static dispatch_once_t onceToken;
 344
 345     dispatch_once(&onceToken, ^{
 346         void *framework = dlopen("/System/Library/Frameworks/Security.framework/Security", RTLD_LAZY);
 347         if (framework) {
 348             FrameworkCertCreateFunctionPtr = dlsym(framework, "SecCertificateCreateWithBytes");
 349         }
 350     });
 351
 352     if (FrameworkCertCreateFunctionPtr) {
 353         return FrameworkCertCreateFunctionPtr(NULL, der_bytes, der_length);
 354     } else {
 355         NSLog(@"WARNING: not using Security framework certificate");
 356         return SecCertificateCreateWithBytes(NULL, der_bytes, der_length);
 357     }
 358 }
 359
 360 SecCertificateRef SecFrameworkCertificateCreateFromTestCert(SecCertificateRef cert) {
 361     return SecFrameworkCertificateCreate(SecCertificateGetBytePtr(cert), SecCertificateGetLength(cert));
 362 }