8514a58e64
[FIXED] mpw_templatesForType now returns a fully allocated array, was relying on undefined behavior before. [FIXED] mpw_variantWithName was allocating a badly sized standard string.
853 lines
28 KiB
Objective-C
853 lines
28 KiB
Objective-C
/**
|
|
* Copyright Maarten Billemont (http://www.lhunath.com, lhunath@lyndir.com)
|
|
*
|
|
* See the enclosed file LICENSE for license information (LGPLv3). If you did
|
|
* not receive this file, see http://www.gnu.org/licenses/lgpl-3.0.txt
|
|
*
|
|
* @author Maarten Billemont <lhunath@lyndir.com>
|
|
* @license http://www.gnu.org/licenses/lgpl-3.0.txt
|
|
*/
|
|
|
|
//
|
|
// MPAlgorithmV0
|
|
//
|
|
// Created by Maarten Billemont on 16/07/12.
|
|
// Copyright 2012 lhunath (Maarten Billemont). All rights reserved.
|
|
//
|
|
|
|
#import "MPAlgorithmV0.h"
|
|
#import "MPEntities.h"
|
|
#import "MPAppDelegate_Shared.h"
|
|
#import "MPAppDelegate_InApp.h"
|
|
#import "mpw-util.h"
|
|
#import "mpw-types.h"
|
|
#include <openssl/bn.h>
|
|
#include <openssl/err.h>
|
|
|
|
/* An AMD HD 7970 calculates 2495M SHA-1 hashes per second at a cost of ~350$ per GPU */
|
|
#define CRACKING_PER_SECOND 2495000000UL
|
|
#define CRACKING_PRICE 350
|
|
|
|
@implementation MPAlgorithmV0 {
|
|
BN_CTX *ctx;
|
|
}
|
|
|
|
- (id)init {
|
|
|
|
if (!(self = [super init]))
|
|
return nil;
|
|
|
|
ctx = BN_CTX_new();
|
|
|
|
return self;
|
|
}
|
|
|
|
- (void)dealloc {
|
|
|
|
BN_CTX_free( ctx );
|
|
ctx = NULL;
|
|
}
|
|
|
|
- (MPAlgorithmVersion)version {
|
|
|
|
return MPAlgorithmVersion0;
|
|
}
|
|
|
|
- (NSString *)description {
|
|
|
|
return strf( @"<%@: version=%lu>", NSStringFromClass( [self class] ), (unsigned long)self.version );
|
|
}
|
|
|
|
- (BOOL)isEqual:(id)other {
|
|
|
|
if (other == self)
|
|
return YES;
|
|
if (!other || ![other conformsToProtocol:@protocol(MPAlgorithm)])
|
|
return NO;
|
|
|
|
return [(id<MPAlgorithm>)other version] == [self version];
|
|
}
|
|
|
|
- (BOOL)tryMigrateUser:(MPUserEntity *)user inContext:(NSManagedObjectContext *)moc {
|
|
|
|
NSError *error = nil;
|
|
NSFetchRequest *migrationRequest = [NSFetchRequest fetchRequestWithEntityName:NSStringFromClass( [MPSiteEntity class] )];
|
|
migrationRequest.predicate = [NSPredicate predicateWithFormat:@"version_ < %d AND user == %@", self.version, user];
|
|
NSArray *migrationSites = [moc executeFetchRequest:migrationRequest error:&error];
|
|
if (!migrationSites) {
|
|
err( @"While looking for sites to migrate: %@", [error fullDescription] );
|
|
return NO;
|
|
}
|
|
|
|
BOOL success = YES;
|
|
for (MPSiteEntity *migrationSite in migrationSites)
|
|
if (![migrationSite tryMigrateExplicitly:NO])
|
|
success = NO;
|
|
|
|
return success;
|
|
}
|
|
|
|
- (BOOL)tryMigrateSite:(MPSiteEntity *)site explicit:(BOOL)explicit {
|
|
|
|
if (site.version != [self version] - 1)
|
|
// Only migrate from previous version.
|
|
return NO;
|
|
|
|
if (!explicit) {
|
|
// This migration requires explicit permission.
|
|
site.requiresExplicitMigration = YES;
|
|
return NO;
|
|
}
|
|
|
|
// Apply migration.
|
|
site.requiresExplicitMigration = NO;
|
|
site.version = [self version];
|
|
return YES;
|
|
}
|
|
|
|
- (MPKey *)keyForPassword:(NSString *)password ofUserNamed:(NSString *)userName {
|
|
|
|
NSDate *start = [NSDate date];
|
|
uint8_t const *masterKeyBytes = mpw_masterKeyForUser( userName.UTF8String, password.UTF8String, [self version] );
|
|
MPKey *masterKey = [self keyFromKeyData:[NSData dataWithBytes:masterKeyBytes length:MP_dkLen]];
|
|
mpw_free( masterKeyBytes, MP_dkLen );
|
|
trc( @"User: %@, password: %@ derives to key ID: %@ (took %0.2fs)", userName, password, [masterKey.keyID encodeHex],
|
|
-[start timeIntervalSinceNow] );
|
|
return masterKey;
|
|
}
|
|
|
|
- (MPKey *)keyFromKeyData:(NSData *)keyData {
|
|
|
|
return [[MPKey alloc] initWithKeyData:keyData algorithm:self];
|
|
}
|
|
|
|
- (NSData *)keyIDForKeyData:(NSData *)keyData {
|
|
|
|
return [keyData hashWith:PearlHashSHA256];
|
|
}
|
|
|
|
- (NSString *)nameOfType:(MPSiteType)type {
|
|
|
|
if (!type)
|
|
return nil;
|
|
|
|
switch (type) {
|
|
case MPSiteTypeGeneratedMaximum:
|
|
return @"Maximum Security Password";
|
|
|
|
case MPSiteTypeGeneratedLong:
|
|
return @"Long Password";
|
|
|
|
case MPSiteTypeGeneratedMedium:
|
|
return @"Medium Password";
|
|
|
|
case MPSiteTypeGeneratedBasic:
|
|
return @"Basic Password";
|
|
|
|
case MPSiteTypeGeneratedShort:
|
|
return @"Short Password";
|
|
|
|
case MPSiteTypeGeneratedPIN:
|
|
return @"PIN";
|
|
|
|
case MPSiteTypeGeneratedName:
|
|
return @"Login Name";
|
|
|
|
case MPSiteTypeGeneratedPhrase:
|
|
return @"Phrase";
|
|
|
|
case MPSiteTypeStoredPersonal:
|
|
return @"Personal Password";
|
|
|
|
case MPSiteTypeStoredDevicePrivate:
|
|
return @"Device Private Password";
|
|
}
|
|
|
|
Throw( @"Type not supported: %lu", (long)type );
|
|
}
|
|
|
|
- (NSString *)shortNameOfType:(MPSiteType)type {
|
|
|
|
if (!type)
|
|
return nil;
|
|
|
|
switch (type) {
|
|
case MPSiteTypeGeneratedMaximum:
|
|
return @"Maximum";
|
|
|
|
case MPSiteTypeGeneratedLong:
|
|
return @"Long";
|
|
|
|
case MPSiteTypeGeneratedMedium:
|
|
return @"Medium";
|
|
|
|
case MPSiteTypeGeneratedBasic:
|
|
return @"Basic";
|
|
|
|
case MPSiteTypeGeneratedShort:
|
|
return @"Short";
|
|
|
|
case MPSiteTypeGeneratedPIN:
|
|
return @"PIN";
|
|
|
|
case MPSiteTypeGeneratedName:
|
|
return @"Name";
|
|
|
|
case MPSiteTypeGeneratedPhrase:
|
|
return @"Phrase";
|
|
|
|
case MPSiteTypeStoredPersonal:
|
|
return @"Personal";
|
|
|
|
case MPSiteTypeStoredDevicePrivate:
|
|
return @"Device";
|
|
}
|
|
|
|
Throw( @"Type not supported: %lu", (long)type );
|
|
}
|
|
|
|
- (NSString *)classNameOfType:(MPSiteType)type {
|
|
|
|
return NSStringFromClass( [self classOfType:type] );
|
|
}
|
|
|
|
- (Class)classOfType:(MPSiteType)type {
|
|
|
|
if (!type)
|
|
Throw( @"No type given." );
|
|
|
|
switch (type) {
|
|
case MPSiteTypeGeneratedMaximum:
|
|
return [MPGeneratedSiteEntity class];
|
|
|
|
case MPSiteTypeGeneratedLong:
|
|
return [MPGeneratedSiteEntity class];
|
|
|
|
case MPSiteTypeGeneratedMedium:
|
|
return [MPGeneratedSiteEntity class];
|
|
|
|
case MPSiteTypeGeneratedBasic:
|
|
return [MPGeneratedSiteEntity class];
|
|
|
|
case MPSiteTypeGeneratedShort:
|
|
return [MPGeneratedSiteEntity class];
|
|
|
|
case MPSiteTypeGeneratedPIN:
|
|
return [MPGeneratedSiteEntity class];
|
|
|
|
case MPSiteTypeGeneratedName:
|
|
return [MPGeneratedSiteEntity class];
|
|
|
|
case MPSiteTypeGeneratedPhrase:
|
|
return [MPGeneratedSiteEntity class];
|
|
|
|
case MPSiteTypeStoredPersonal:
|
|
return [MPStoredSiteEntity class];
|
|
|
|
case MPSiteTypeStoredDevicePrivate:
|
|
return [MPStoredSiteEntity class];
|
|
}
|
|
|
|
Throw( @"Type not supported: %lu", (long)type );
|
|
}
|
|
|
|
- (NSArray *)allTypes {
|
|
|
|
return [self allTypesStartingWith:MPSiteTypeGeneratedMaximum];
|
|
}
|
|
|
|
- (NSArray *)allTypesStartingWith:(MPSiteType)startingType {
|
|
|
|
NSMutableArray *allTypes = [[NSMutableArray alloc] initWithCapacity:8];
|
|
MPSiteType currentType = startingType;
|
|
do {
|
|
[allTypes addObject:@(currentType)];
|
|
} while ((currentType = [self nextType:currentType]) != startingType);
|
|
|
|
return allTypes;
|
|
}
|
|
|
|
- (MPSiteType)nextType:(MPSiteType)type {
|
|
|
|
switch (type) {
|
|
case MPSiteTypeGeneratedMaximum:
|
|
return MPSiteTypeGeneratedLong;
|
|
case MPSiteTypeGeneratedLong:
|
|
return MPSiteTypeGeneratedMedium;
|
|
case MPSiteTypeGeneratedMedium:
|
|
return MPSiteTypeGeneratedBasic;
|
|
case MPSiteTypeGeneratedBasic:
|
|
return MPSiteTypeGeneratedShort;
|
|
case MPSiteTypeGeneratedShort:
|
|
return MPSiteTypeGeneratedPIN;
|
|
case MPSiteTypeGeneratedPIN:
|
|
return MPSiteTypeStoredPersonal;
|
|
case MPSiteTypeStoredPersonal:
|
|
return MPSiteTypeStoredDevicePrivate;
|
|
case MPSiteTypeStoredDevicePrivate:
|
|
return MPSiteTypeGeneratedMaximum;
|
|
default:
|
|
return MPSiteTypeGeneratedLong;
|
|
}
|
|
}
|
|
|
|
- (MPSiteType)previousType:(MPSiteType)type {
|
|
|
|
MPSiteType previousType = type, nextType = type;
|
|
while ((nextType = [self nextType:nextType]) != type)
|
|
previousType = nextType;
|
|
|
|
return previousType;
|
|
}
|
|
|
|
- (NSString *)generateLoginForSiteNamed:(NSString *)name usingKey:(MPKey *)key {
|
|
|
|
return [self generateContentForSiteNamed:name ofType:MPSiteTypeGeneratedName withCounter:1
|
|
variant:MPSiteVariantLogin context:nil usingKey:key];
|
|
}
|
|
|
|
- (NSString *)generatePasswordForSiteNamed:(NSString *)name ofType:(MPSiteType)type withCounter:(NSUInteger)counter
|
|
usingKey:(MPKey *)key {
|
|
|
|
return [self generateContentForSiteNamed:name ofType:type withCounter:counter
|
|
variant:MPSiteVariantPassword context:nil usingKey:key];
|
|
}
|
|
|
|
- (NSString *)generateAnswerForSiteNamed:(NSString *)name onQuestion:(NSString *)question usingKey:(MPKey *)key {
|
|
|
|
return [self generateContentForSiteNamed:name ofType:MPSiteTypeGeneratedPhrase withCounter:1
|
|
variant:MPSiteVariantAnswer context:question usingKey:key];
|
|
}
|
|
|
|
- (NSString *)generateContentForSiteNamed:(NSString *)name ofType:(MPSiteType)type withCounter:(NSUInteger)counter
|
|
variant:(MPSiteVariant)variant context:(NSString *)context usingKey:(MPKey *)key {
|
|
|
|
char const *contentBytes = mpw_passwordForSite( key.keyData.bytes, name.UTF8String, type, (uint32_t)counter,
|
|
variant, context.UTF8String, [self version] );
|
|
NSString *content = [NSString stringWithCString:contentBytes encoding:NSUTF8StringEncoding];
|
|
mpw_freeString( contentBytes );
|
|
|
|
return content;
|
|
}
|
|
|
|
- (NSString *)storedLoginForSite:(MPStoredSiteEntity *)site usingKey:(MPKey *)key {
|
|
|
|
return nil;
|
|
}
|
|
|
|
- (NSString *)storedPasswordForSite:(MPStoredSiteEntity *)site usingKey:(MPKey *)key {
|
|
|
|
return [self decryptContent:site.contentObject usingKey:key];
|
|
}
|
|
|
|
- (BOOL)savePassword:(NSString *)clearContent toSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey {
|
|
|
|
NSAssert( [siteKey.keyID isEqualToData:site.user.keyID], @"Site does not belong to current user." );
|
|
switch (site.type) {
|
|
case MPSiteTypeGeneratedMaximum:
|
|
case MPSiteTypeGeneratedLong:
|
|
case MPSiteTypeGeneratedMedium:
|
|
case MPSiteTypeGeneratedBasic:
|
|
case MPSiteTypeGeneratedShort:
|
|
case MPSiteTypeGeneratedPIN:
|
|
case MPSiteTypeGeneratedName:
|
|
case MPSiteTypeGeneratedPhrase: {
|
|
wrn( @"Cannot save content to site with generated type %lu.", (long)site.type );
|
|
return NO;
|
|
}
|
|
|
|
case MPSiteTypeStoredPersonal: {
|
|
if (![site isKindOfClass:[MPStoredSiteEntity class]]) {
|
|
wrn( @"Site with stored type %lu is not an MPStoredSiteEntity, but a %@.",
|
|
(long)site.type, [site class] );
|
|
return NO;
|
|
}
|
|
|
|
NSData *encryptedContent = [[clearContent dataUsingEncoding:NSUTF8StringEncoding]
|
|
encryptWithSymmetricKey:[siteKey subKeyOfLength:PearlCryptKeySize].keyData padding:YES];
|
|
if ([((MPStoredSiteEntity *)site).contentObject isEqualToData:encryptedContent])
|
|
return NO;
|
|
|
|
((MPStoredSiteEntity *)site).contentObject = encryptedContent;
|
|
return YES;
|
|
}
|
|
case MPSiteTypeStoredDevicePrivate: {
|
|
if (![site isKindOfClass:[MPStoredSiteEntity class]]) {
|
|
wrn( @"Site with stored type %lu is not an MPStoredSiteEntity, but a %@.",
|
|
(long)site.type, [site class] );
|
|
return NO;
|
|
}
|
|
|
|
NSData *encryptedContent = [[clearContent dataUsingEncoding:NSUTF8StringEncoding]
|
|
encryptWithSymmetricKey:[siteKey subKeyOfLength:PearlCryptKeySize].keyData padding:YES];
|
|
NSDictionary *siteQuery = [self queryForDevicePrivateSiteNamed:site.name];
|
|
if (!encryptedContent)
|
|
[PearlKeyChain deleteItemForQuery:siteQuery];
|
|
else
|
|
[PearlKeyChain addOrUpdateItemForQuery:siteQuery withAttributes:@{
|
|
(__bridge id)kSecValueData : encryptedContent,
|
|
#if TARGET_OS_IPHONE
|
|
(__bridge id)kSecAttrAccessible : (__bridge id)kSecAttrAccessibleWhenUnlockedThisDeviceOnly,
|
|
#endif
|
|
}];
|
|
((MPStoredSiteEntity *)site).contentObject = nil;
|
|
return YES;
|
|
}
|
|
}
|
|
|
|
Throw( @"Unsupported type: %ld", (long)site.type );
|
|
}
|
|
|
|
- (NSString *)resolveLoginForSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey {
|
|
|
|
dispatch_group_t group = dispatch_group_create();
|
|
dispatch_group_enter( group );
|
|
__block NSString *result = nil;
|
|
[self resolveLoginForSite:site usingKey:siteKey result:^(NSString *result_) {
|
|
result = result_;
|
|
dispatch_group_leave( group );
|
|
}];
|
|
dispatch_group_wait( group, DISPATCH_TIME_FOREVER );
|
|
|
|
return result;
|
|
}
|
|
|
|
- (NSString *)resolvePasswordForSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey {
|
|
|
|
dispatch_group_t group = dispatch_group_create();
|
|
dispatch_group_enter( group );
|
|
__block NSString *result = nil;
|
|
[self resolvePasswordForSite:site usingKey:siteKey result:^(NSString *result_) {
|
|
result = result_;
|
|
dispatch_group_leave( group );
|
|
}];
|
|
dispatch_group_wait( group, DISPATCH_TIME_FOREVER );
|
|
|
|
return result;
|
|
}
|
|
|
|
- (NSString *)resolveAnswerForSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey {
|
|
|
|
dispatch_group_t group = dispatch_group_create();
|
|
dispatch_group_enter( group );
|
|
__block NSString *result = nil;
|
|
[self resolveAnswerForSite:site usingKey:siteKey result:^(NSString *result_) {
|
|
result = result_;
|
|
dispatch_group_leave( group );
|
|
}];
|
|
dispatch_group_wait( group, DISPATCH_TIME_FOREVER );
|
|
|
|
return result;
|
|
}
|
|
|
|
- (NSString *)resolveAnswerForQuestion:(MPSiteQuestionEntity *)question usingKey:(MPKey *)siteKey {
|
|
|
|
dispatch_group_t group = dispatch_group_create();
|
|
dispatch_group_enter( group );
|
|
__block NSString *result = nil;
|
|
[self resolveAnswerForQuestion:question usingKey:siteKey result:^(NSString *result_) {
|
|
result = result_;
|
|
dispatch_group_leave( group );
|
|
}];
|
|
dispatch_group_wait( group, DISPATCH_TIME_FOREVER );
|
|
|
|
return result;
|
|
}
|
|
|
|
- (void)resolveLoginForSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey result:(void ( ^ )(NSString *result))resultBlock {
|
|
|
|
NSAssert( [siteKey.keyID isEqualToData:site.user.keyID], @"Site does not belong to current user." );
|
|
NSString *name = site.name;
|
|
BOOL loginGenerated = site.loginGenerated && [[MPAppDelegate_Shared get] isFeatureUnlocked:MPProductGenerateLogins];
|
|
NSString *loginName = loginGenerated? nil: site.loginName;
|
|
id<MPAlgorithm> algorithm = nil;
|
|
if (!name.length)
|
|
err( @"Missing name." );
|
|
else if (!siteKey.keyData.length)
|
|
err( @"Missing key." );
|
|
else
|
|
algorithm = site.algorithm;
|
|
|
|
dispatch_async( dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0 ), ^{
|
|
if (loginGenerated)
|
|
resultBlock( [algorithm generateLoginForSiteNamed:name usingKey:siteKey] );
|
|
else
|
|
resultBlock( loginName );
|
|
} );
|
|
}
|
|
|
|
- (void)resolvePasswordForSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey result:(void ( ^ )(NSString *result))resultBlock {
|
|
|
|
NSAssert( [siteKey.keyID isEqualToData:site.user.keyID], @"Site does not belong to current user." );
|
|
switch (site.type) {
|
|
case MPSiteTypeGeneratedMaximum:
|
|
case MPSiteTypeGeneratedLong:
|
|
case MPSiteTypeGeneratedMedium:
|
|
case MPSiteTypeGeneratedBasic:
|
|
case MPSiteTypeGeneratedShort:
|
|
case MPSiteTypeGeneratedPIN:
|
|
case MPSiteTypeGeneratedName:
|
|
case MPSiteTypeGeneratedPhrase: {
|
|
if (![site isKindOfClass:[MPGeneratedSiteEntity class]]) {
|
|
wrn( @"Site with generated type %lu is not an MPGeneratedSiteEntity, but a %@.",
|
|
(long)site.type, [site class] );
|
|
break;
|
|
}
|
|
|
|
NSString *name = site.name;
|
|
MPSiteType type = site.type;
|
|
NSUInteger counter = ((MPGeneratedSiteEntity *)site).counter;
|
|
id<MPAlgorithm> algorithm = nil;
|
|
if (!site.name.length)
|
|
err( @"Missing name." );
|
|
else if (!siteKey.keyData.length)
|
|
err( @"Missing key." );
|
|
else
|
|
algorithm = site.algorithm;
|
|
|
|
dispatch_async( dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0 ), ^{
|
|
NSString *result = [algorithm generatePasswordForSiteNamed:name ofType:type withCounter:counter usingKey:siteKey];
|
|
resultBlock( result );
|
|
} );
|
|
break;
|
|
}
|
|
|
|
case MPSiteTypeStoredPersonal: {
|
|
if (![site isKindOfClass:[MPStoredSiteEntity class]]) {
|
|
wrn( @"Site with stored type %lu is not an MPStoredSiteEntity, but a %@.",
|
|
(long)site.type, [site class] );
|
|
break;
|
|
}
|
|
|
|
NSData *encryptedContent = ((MPStoredSiteEntity *)site).contentObject;
|
|
|
|
dispatch_async( dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0 ), ^{
|
|
NSString *result = [self decryptContent:encryptedContent usingKey:siteKey];
|
|
resultBlock( result );
|
|
} );
|
|
break;
|
|
}
|
|
case MPSiteTypeStoredDevicePrivate: {
|
|
NSAssert( [site isKindOfClass:[MPStoredSiteEntity class]],
|
|
@"Site with stored type %lu is not an MPStoredSiteEntity, but a %@.", (long)site.type,
|
|
[site class] );
|
|
|
|
NSDictionary *siteQuery = [self queryForDevicePrivateSiteNamed:site.name];
|
|
NSData *encryptedContent = [PearlKeyChain dataOfItemForQuery:siteQuery];
|
|
|
|
dispatch_async( dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0 ), ^{
|
|
NSString *result = [self decryptContent:encryptedContent usingKey:siteKey];
|
|
resultBlock( result );
|
|
} );
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
- (void)resolveAnswerForSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey result:(void ( ^ )(NSString *result))resultBlock {
|
|
|
|
NSAssert( [siteKey.keyID isEqualToData:site.user.keyID], @"Site does not belong to current user." );
|
|
NSString *name = site.name;
|
|
id<MPAlgorithm> algorithm = nil;
|
|
if (!site.name.length)
|
|
err( @"Missing name." );
|
|
else if (!siteKey.keyData.length)
|
|
err( @"Missing key." );
|
|
else
|
|
algorithm = site.algorithm;
|
|
|
|
dispatch_async( dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0 ), ^{
|
|
NSString *result = [algorithm generateAnswerForSiteNamed:name onQuestion:nil usingKey:siteKey];
|
|
resultBlock( result );
|
|
} );
|
|
}
|
|
|
|
- (void)resolveAnswerForQuestion:(MPSiteQuestionEntity *)question usingKey:(MPKey *)siteKey
|
|
result:(void ( ^ )(NSString *result))resultBlock {
|
|
|
|
NSAssert( [siteKey.keyID isEqualToData:question.site.user.keyID], @"Site does not belong to current user." );
|
|
NSString *name = question.site.name;
|
|
NSString *keyword = question.keyword;
|
|
id<MPAlgorithm> algorithm = nil;
|
|
if (!name.length)
|
|
err( @"Missing name." );
|
|
else if (!siteKey.keyData.length)
|
|
err( @"Missing key." );
|
|
else
|
|
algorithm = question.site.algorithm;
|
|
|
|
dispatch_async( dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0 ), ^{
|
|
NSString *result = [algorithm generateAnswerForSiteNamed:name onQuestion:keyword usingKey:siteKey];
|
|
resultBlock( result );
|
|
} );
|
|
}
|
|
|
|
- (void)importProtectedPassword:(NSString *)protectedContent protectedByKey:(MPKey *)importKey
|
|
intoSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey {
|
|
|
|
NSAssert( [siteKey.keyID isEqualToData:site.user.keyID], @"Site does not belong to current user." );
|
|
switch (site.type) {
|
|
case MPSiteTypeGeneratedMaximum:
|
|
case MPSiteTypeGeneratedLong:
|
|
case MPSiteTypeGeneratedMedium:
|
|
case MPSiteTypeGeneratedBasic:
|
|
case MPSiteTypeGeneratedShort:
|
|
case MPSiteTypeGeneratedPIN:
|
|
case MPSiteTypeGeneratedName:
|
|
case MPSiteTypeGeneratedPhrase:
|
|
break;
|
|
|
|
case MPSiteTypeStoredPersonal: {
|
|
if (![site isKindOfClass:[MPStoredSiteEntity class]]) {
|
|
wrn( @"Site with stored type %lu is not an MPStoredSiteEntity, but a %@.",
|
|
(long)site.type, [site class] );
|
|
break;
|
|
}
|
|
if ([importKey.keyID isEqualToData:siteKey.keyID])
|
|
((MPStoredSiteEntity *)site).contentObject = [protectedContent decodeBase64];
|
|
|
|
else {
|
|
NSString *clearContent = [self decryptContent:[protectedContent decodeBase64] usingKey:importKey];
|
|
[self importClearTextPassword:clearContent intoSite:site usingKey:siteKey];
|
|
}
|
|
break;
|
|
}
|
|
|
|
case MPSiteTypeStoredDevicePrivate:
|
|
break;
|
|
}
|
|
}
|
|
|
|
- (void)importClearTextPassword:(NSString *)clearContent intoSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey {
|
|
|
|
NSAssert( [siteKey.keyID isEqualToData:site.user.keyID], @"Site does not belong to current user." );
|
|
switch (site.type) {
|
|
case MPSiteTypeGeneratedMaximum:
|
|
case MPSiteTypeGeneratedLong:
|
|
case MPSiteTypeGeneratedMedium:
|
|
case MPSiteTypeGeneratedBasic:
|
|
case MPSiteTypeGeneratedShort:
|
|
case MPSiteTypeGeneratedPIN:
|
|
case MPSiteTypeGeneratedName:
|
|
case MPSiteTypeGeneratedPhrase:
|
|
break;
|
|
|
|
case MPSiteTypeStoredPersonal: {
|
|
[self savePassword:clearContent toSite:site usingKey:siteKey];
|
|
break;
|
|
}
|
|
|
|
case MPSiteTypeStoredDevicePrivate:
|
|
break;
|
|
}
|
|
}
|
|
|
|
- (NSString *)exportPasswordForSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey {
|
|
|
|
NSAssert( [siteKey.keyID isEqualToData:site.user.keyID], @"Site does not belong to current user." );
|
|
if (!(site.type & MPSiteFeatureExportContent))
|
|
return nil;
|
|
|
|
NSString *result = nil;
|
|
switch (site.type) {
|
|
case MPSiteTypeGeneratedMaximum:
|
|
case MPSiteTypeGeneratedLong:
|
|
case MPSiteTypeGeneratedMedium:
|
|
case MPSiteTypeGeneratedBasic:
|
|
case MPSiteTypeGeneratedShort:
|
|
case MPSiteTypeGeneratedPIN:
|
|
case MPSiteTypeGeneratedName:
|
|
case MPSiteTypeGeneratedPhrase: {
|
|
result = nil;
|
|
break;
|
|
}
|
|
|
|
case MPSiteTypeStoredPersonal: {
|
|
if (![site isKindOfClass:[MPStoredSiteEntity class]]) {
|
|
wrn( @"Site with stored type %lu is not an MPStoredSiteEntity, but a %@.",
|
|
(long)site.type, [site class] );
|
|
break;
|
|
}
|
|
result = [((MPStoredSiteEntity *)site).contentObject encodeBase64];
|
|
break;
|
|
}
|
|
|
|
case MPSiteTypeStoredDevicePrivate: {
|
|
result = nil;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
- (BOOL)migrateExplicitly:(BOOL)explicit {
|
|
|
|
return NO;
|
|
}
|
|
|
|
- (NSDictionary *)queryForDevicePrivateSiteNamed:(NSString *)name {
|
|
|
|
return [PearlKeyChain createQueryForClass:kSecClassGenericPassword
|
|
attributes:@{
|
|
(__bridge id)kSecAttrService : @"DevicePrivate",
|
|
(__bridge id)kSecAttrAccount : name
|
|
}
|
|
matches:nil];
|
|
}
|
|
|
|
- (NSString *)decryptContent:(NSData *)encryptedContent usingKey:(MPKey *)key {
|
|
|
|
if (!key)
|
|
return nil;
|
|
NSData *decryptedContent = nil;
|
|
if ([encryptedContent length])
|
|
decryptedContent = [encryptedContent decryptWithSymmetricKey:[key subKeyOfLength:PearlCryptKeySize].keyData padding:YES];
|
|
if (!decryptedContent)
|
|
return nil;
|
|
|
|
return [[NSString alloc] initWithBytes:decryptedContent.bytes length:decryptedContent.length encoding:NSUTF8StringEncoding];
|
|
}
|
|
|
|
- (BOOL)timeToCrack:(out TimeToCrack *)timeToCrack passwordOfType:(MPSiteType)type byAttacker:(MPAttacker)attacker {
|
|
|
|
if (!type)
|
|
return NO;
|
|
size_t count = 0;
|
|
const char **templates = mpw_templatesForType( type, &count );
|
|
if (!templates)
|
|
return NO;
|
|
|
|
BIGNUM *permutations = BN_new(), *templatePermutations = BN_new();
|
|
for (size_t t = 0; t < count; ++t) {
|
|
const char *template = templates[t];
|
|
BN_one( templatePermutations );
|
|
|
|
for (NSUInteger c = 0; c < strlen( template ); ++c)
|
|
BN_mul_word( templatePermutations,
|
|
(BN_ULONG)strlen( mpw_charactersInClass( template[c] ) ) );
|
|
|
|
BN_add( permutations, permutations, templatePermutations );
|
|
}
|
|
BN_free( templatePermutations );
|
|
free( templates );
|
|
|
|
return [self timeToCrack:timeToCrack permutations:permutations forAttacker:attacker];
|
|
}
|
|
|
|
- (BOOL)timeToCrack:(out TimeToCrack *)timeToCrack passwordString:(NSString *)password byAttacker:(MPAttacker)attacker {
|
|
|
|
BIGNUM *permutations = BN_new();
|
|
BN_one( permutations );
|
|
|
|
for (NSUInteger c = 0; c < [password length]; ++c) {
|
|
const char passwordCharacter = [password substringWithRange:NSMakeRange( c, 1 )].UTF8String[0];
|
|
|
|
unsigned int characterEntropy = 0;
|
|
for (NSString *characterClass in @[ @"v", @"c", @"a", @"x" ]) {
|
|
char const *charactersForClass = mpw_charactersInClass( characterClass.UTF8String[0] );
|
|
|
|
if (strchr( charactersForClass, passwordCharacter )) {
|
|
// Found class for password character.
|
|
characterEntropy = (BN_ULONG)strlen(charactersForClass);
|
|
break;
|
|
}
|
|
}
|
|
if (!characterEntropy)
|
|
characterEntropy = 256 /* a byte */;
|
|
|
|
BN_mul_word( permutations, characterEntropy );
|
|
}
|
|
|
|
return [self timeToCrack:timeToCrack permutations:permutations forAttacker:attacker];
|
|
}
|
|
|
|
- (BOOL)timeToCrack:(out TimeToCrack *)timeToCrack permutations:(BIGNUM *)permutations forAttacker:(MPAttacker)attacker {
|
|
|
|
// Determine base seconds needed to calculate the permutations.
|
|
BIGNUM *secondsToCrack = BN_dup( permutations );
|
|
BN_div_word( secondsToCrack, CRACKING_PER_SECOND );
|
|
|
|
// Modify seconds needed by applying our hardware budget.
|
|
switch (attacker) {
|
|
case MPAttacker1:
|
|
break;
|
|
case MPAttacker5K:
|
|
BN_mul_word( secondsToCrack, CRACKING_PRICE );
|
|
BN_div_word( secondsToCrack, 5000 );
|
|
break;
|
|
case MPAttacker20M:
|
|
BN_mul_word( secondsToCrack, CRACKING_PRICE );
|
|
BN_div_word( secondsToCrack, 20000000 );
|
|
break;
|
|
case MPAttacker5B:
|
|
BN_mul_word( secondsToCrack, CRACKING_PRICE );
|
|
BN_div_word( secondsToCrack, 5000 );
|
|
BN_div_word( secondsToCrack, 1000000 );
|
|
break;
|
|
}
|
|
|
|
BIGNUM *max = BN_new();
|
|
BN_set_word( max, (BN_ULONG)-1 );
|
|
|
|
BIGNUM *hoursToCrack = BN_dup( secondsToCrack );
|
|
BN_div_word( hoursToCrack, 3600 );
|
|
if (BN_cmp( hoursToCrack, max ) < 0)
|
|
timeToCrack->hours = BN_get_word( hoursToCrack );
|
|
else
|
|
timeToCrack->hours = (BN_ULONG)-1;
|
|
|
|
BIGNUM *daysToCrack = BN_dup( hoursToCrack );
|
|
BN_div_word( daysToCrack, 24 );
|
|
if (BN_cmp( daysToCrack, max ) < 0)
|
|
timeToCrack->days = BN_get_word( daysToCrack );
|
|
else
|
|
timeToCrack->days = (BN_ULONG)-1;
|
|
|
|
BIGNUM *weeksToCrack = BN_dup( daysToCrack );
|
|
BN_div_word( weeksToCrack, 7 );
|
|
if (BN_cmp( weeksToCrack, max ) < 0)
|
|
timeToCrack->weeks = BN_get_word( weeksToCrack );
|
|
else
|
|
timeToCrack->weeks = (BN_ULONG)-1;
|
|
|
|
BIGNUM *monthsToCrack = BN_dup( daysToCrack );
|
|
BN_div_word( monthsToCrack, 31 );
|
|
if (BN_cmp( monthsToCrack, max ) < 0)
|
|
timeToCrack->months = BN_get_word( monthsToCrack );
|
|
else
|
|
timeToCrack->months = (BN_ULONG)-1;
|
|
|
|
BIGNUM *yearsToCrack = BN_dup( daysToCrack );
|
|
BN_div_word( yearsToCrack, 356 );
|
|
if (BN_cmp( yearsToCrack, max ) < 0)
|
|
timeToCrack->years = BN_get_word( yearsToCrack );
|
|
else
|
|
timeToCrack->years = (BN_ULONG)-1;
|
|
|
|
BIGNUM *universesToCrack = BN_dup( yearsToCrack );
|
|
BN_div_word( universesToCrack, 14000 );
|
|
BN_div_word( universesToCrack, 1000000 );
|
|
if (BN_cmp( universesToCrack, max ) < 0)
|
|
timeToCrack->universes = BN_get_word( universesToCrack );
|
|
else
|
|
timeToCrack->universes = (BN_ULONG)-1;
|
|
|
|
for (unsigned long error = ERR_get_error(); error; error = ERR_get_error())
|
|
err( @"bignum error: %lu", error );
|
|
|
|
BN_free( max );
|
|
BN_free( permutations );
|
|
BN_free( secondsToCrack );
|
|
BN_free( hoursToCrack );
|
|
BN_free( daysToCrack );
|
|
BN_free( weeksToCrack );
|
|
BN_free( monthsToCrack );
|
|
BN_free( yearsToCrack );
|
|
BN_free( universesToCrack );
|
|
|
|
return YES;
|
|
}
|
|
|
|
@end
|