896 lines
30 KiB
Objective-C
896 lines
30 KiB
Objective-C
//==============================================================================
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// This file is part of Master Password.
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// Copyright (c) 2011-2017, Maarten Billemont.
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//
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// Master Password is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Master Password is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You can find a copy of the GNU General Public License in the
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// LICENSE file. Alternatively, see <http://www.gnu.org/licenses/>.
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//==============================================================================
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#ifndef trc
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#error error
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#endif
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#import "MPAlgorithmV0.h"
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#import "MPEntities.h"
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#import "MPAppDelegate_Shared.h"
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#import "MPAppDelegate_InApp.h"
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#import "mpw-util.h"
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#include <openssl/bn.h>
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#include <openssl/err.h>
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/* An AMD HD 7970 calculates 2495M SHA-1 hashes per second at a cost of ~350$ per GPU */
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#define CRACKING_PER_SECOND 2495000000UL
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#define CRACKING_PRICE 350
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NSOperationQueue *_mpwQueue = nil;
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@implementation MPAlgorithmV0 {
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BN_CTX *_ctx;
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}
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- (id)init {
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if (!(self = [super init]))
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return nil;
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_ctx = BN_CTX_new();
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static dispatch_once_t once = 0;
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dispatch_once( &once, ^{
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_mpwQueue = [NSOperationQueue new];
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_mpwQueue.maxConcurrentOperationCount = 1;
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_mpwQueue.name = @"mpw queue";
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} );
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return self;
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}
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- (void)dealloc {
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BN_CTX_free( _ctx );
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_ctx = NULL;
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}
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- (MPAlgorithmVersion)version {
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return MPAlgorithmVersion0;
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}
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- (NSString *)description {
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return strf( @"V%lu", (unsigned long)self.version );
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}
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- (NSString *)debugDescription {
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return strf( @"<%@: version=%lu>", NSStringFromClass( [self class] ), (unsigned long)self.version );
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}
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- (BOOL)isEqual:(id)other {
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if (other == self)
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return YES;
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if (!other || ![other conformsToProtocol:@protocol(MPAlgorithm)])
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return NO;
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return [(id<MPAlgorithm>)other version] == [self version];
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}
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- (void)mpw_perform:(void ( ^ )(void))operationBlock {
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if ([NSOperationQueue currentQueue] == _mpwQueue) {
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operationBlock();
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return;
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}
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NSOperation *operation = [NSBlockOperation blockOperationWithBlock:operationBlock];
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if ([operation respondsToSelector:@selector( qualityOfService )])
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operation.qualityOfService = NSQualityOfServiceUserInitiated;
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[_mpwQueue addOperations:@[ operation ] waitUntilFinished:YES];
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}
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- (BOOL)tryMigrateUser:(MPUserEntity *)user inContext:(NSManagedObjectContext *)moc {
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NSError *error = nil;
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NSFetchRequest *migrationRequest = [NSFetchRequest fetchRequestWithEntityName:NSStringFromClass( [MPSiteEntity class] )];
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migrationRequest.predicate = [NSPredicate predicateWithFormat:@"version_ < %d AND user == %@", self.version, user];
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NSArray *migrationSites = [moc executeFetchRequest:migrationRequest error:&error];
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if (!migrationSites) {
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err( @"While looking for sites to migrate: %@", [error fullDescription] );
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return NO;
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}
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BOOL success = YES;
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for (MPSiteEntity *migrationSite in migrationSites)
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if (![migrationSite tryMigrateExplicitly:NO])
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success = NO;
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return success;
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}
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- (BOOL)tryMigrateSite:(MPSiteEntity *)site explicit:(BOOL)explicit {
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if ([site.algorithm version] != [self version] - 1)
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// Only migrate from previous version.
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return NO;
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if (!explicit) {
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// This migration requires explicit permission.
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site.requiresExplicitMigration = YES;
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return NO;
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}
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// Apply migration.
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site.requiresExplicitMigration = NO;
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site.algorithm = self;
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return YES;
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}
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- (NSData *)keyDataForFullName:(NSString *)fullName withMasterPassword:(NSString *)masterPassword {
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__block NSData *keyData;
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[self mpw_perform:^{
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NSDate *start = [NSDate date];
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uint8_t const *masterKeyBytes = mpw_masterKeyForUser( fullName.UTF8String, masterPassword.UTF8String, [self version] );
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if (masterKeyBytes) {
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keyData = [NSData dataWithBytes:masterKeyBytes length:MP_dkLen];
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trc( @"User: %@, password: %@ derives to key ID: %@ (took %0.2fs)", //
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fullName, masterPassword, [self keyIDForKeyData:keyData], -[start timeIntervalSinceNow] );
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mpw_free( masterKeyBytes, MP_dkLen );
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}
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}];
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return keyData;
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}
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- (NSData *)keyIDForKeyData:(NSData *)keyData {
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return [keyData hashWith:PearlHashSHA256];
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}
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- (NSString *)nameOfType:(MPSiteType)type {
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if (!type)
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return nil;
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switch (type) {
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case MPSiteTypeGeneratedMaximum:
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return @"Maximum Security Password";
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case MPSiteTypeGeneratedLong:
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return @"Long Password";
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case MPSiteTypeGeneratedMedium:
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return @"Medium Password";
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case MPSiteTypeGeneratedBasic:
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return @"Basic Password";
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case MPSiteTypeGeneratedShort:
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return @"Short Password";
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case MPSiteTypeGeneratedPIN:
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return @"PIN";
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case MPSiteTypeGeneratedName:
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return @"Name";
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case MPSiteTypeGeneratedPhrase:
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return @"Phrase";
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case MPSiteTypeStoredPersonal:
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return @"Personal Password";
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case MPSiteTypeStoredDevicePrivate:
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return @"Device Private Password";
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}
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Throw( @"Type not supported: %lu", (long)type );
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}
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- (NSString *)shortNameOfType:(MPSiteType)type {
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if (!type)
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return nil;
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switch (type) {
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case MPSiteTypeGeneratedMaximum:
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return @"Maximum";
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case MPSiteTypeGeneratedLong:
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return @"Long";
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case MPSiteTypeGeneratedMedium:
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return @"Medium";
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case MPSiteTypeGeneratedBasic:
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return @"Basic";
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case MPSiteTypeGeneratedShort:
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return @"Short";
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case MPSiteTypeGeneratedPIN:
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return @"PIN";
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case MPSiteTypeGeneratedName:
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return @"Name";
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case MPSiteTypeGeneratedPhrase:
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return @"Phrase";
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case MPSiteTypeStoredPersonal:
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return @"Personal";
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case MPSiteTypeStoredDevicePrivate:
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return @"Device";
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}
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Throw( @"Type not supported: %lu", (long)type );
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}
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- (NSString *)classNameOfType:(MPSiteType)type {
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return NSStringFromClass( [self classOfType:type] );
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}
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- (Class)classOfType:(MPSiteType)type {
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if (!type)
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Throw( @"No type given." );
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switch (type) {
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case MPSiteTypeGeneratedMaximum:
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return [MPGeneratedSiteEntity class];
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case MPSiteTypeGeneratedLong:
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return [MPGeneratedSiteEntity class];
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case MPSiteTypeGeneratedMedium:
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return [MPGeneratedSiteEntity class];
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case MPSiteTypeGeneratedBasic:
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return [MPGeneratedSiteEntity class];
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case MPSiteTypeGeneratedShort:
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return [MPGeneratedSiteEntity class];
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case MPSiteTypeGeneratedPIN:
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return [MPGeneratedSiteEntity class];
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case MPSiteTypeGeneratedName:
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return [MPGeneratedSiteEntity class];
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case MPSiteTypeGeneratedPhrase:
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return [MPGeneratedSiteEntity class];
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case MPSiteTypeStoredPersonal:
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return [MPStoredSiteEntity class];
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case MPSiteTypeStoredDevicePrivate:
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return [MPStoredSiteEntity class];
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}
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Throw( @"Type not supported: %lu", (long)type );
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}
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- (NSArray *)allTypes {
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return [self allTypesStartingWith:MPSiteTypeGeneratedPhrase];
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}
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- (NSArray *)allTypesStartingWith:(MPSiteType)startingType {
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NSMutableArray *allTypes = [[NSMutableArray alloc] initWithCapacity:8];
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MPSiteType currentType = startingType;
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do {
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[allTypes addObject:@(currentType)];
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} while ((currentType = [self nextType:currentType]) != startingType);
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return allTypes;
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}
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- (MPSiteType)nextType:(MPSiteType)type {
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switch (type) {
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case MPSiteTypeGeneratedPhrase:
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return MPSiteTypeGeneratedName;
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case MPSiteTypeGeneratedName:
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return MPSiteTypeGeneratedMaximum;
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case MPSiteTypeGeneratedMaximum:
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return MPSiteTypeGeneratedLong;
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case MPSiteTypeGeneratedLong:
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return MPSiteTypeGeneratedMedium;
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case MPSiteTypeGeneratedMedium:
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return MPSiteTypeGeneratedBasic;
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case MPSiteTypeGeneratedBasic:
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return MPSiteTypeGeneratedShort;
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case MPSiteTypeGeneratedShort:
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return MPSiteTypeGeneratedPIN;
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case MPSiteTypeGeneratedPIN:
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return MPSiteTypeStoredPersonal;
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case MPSiteTypeStoredPersonal:
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return MPSiteTypeStoredDevicePrivate;
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case MPSiteTypeStoredDevicePrivate:
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return MPSiteTypeGeneratedPhrase;
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default:
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return MPSiteTypeGeneratedLong;
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}
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}
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- (MPSiteType)previousType:(MPSiteType)type {
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MPSiteType previousType = type, nextType = type;
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while ((nextType = [self nextType:nextType]) != type)
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previousType = nextType;
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return previousType;
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}
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- (NSString *)generateLoginForSiteNamed:(NSString *)name usingKey:(MPKey *)key {
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return [self generateContentForSiteNamed:name ofType:MPSiteTypeGeneratedName withCounter:1
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variant:MPSiteVariantLogin context:nil usingKey:key];
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}
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- (NSString *)generatePasswordForSiteNamed:(NSString *)name ofType:(MPSiteType)type withCounter:(NSUInteger)counter
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usingKey:(MPKey *)key {
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return [self generateContentForSiteNamed:name ofType:type withCounter:counter
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variant:MPSiteVariantPassword context:nil usingKey:key];
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}
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- (NSString *)generateAnswerForSiteNamed:(NSString *)name onQuestion:(NSString *)question usingKey:(MPKey *)key {
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return [self generateContentForSiteNamed:name ofType:MPSiteTypeGeneratedPhrase withCounter:1
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variant:MPSiteVariantAnswer context:question usingKey:key];
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}
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- (NSString *)generateContentForSiteNamed:(NSString *)name ofType:(MPSiteType)type withCounter:(NSUInteger)counter
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variant:(MPSiteVariant)variant context:(NSString *)context usingKey:(MPKey *)key {
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__block NSString *content;
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[self mpw_perform:^{
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char const *contentBytes = mpw_passwordForSite( [key keyDataForAlgorithm:self].bytes,
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name.UTF8String, type, (uint32_t)counter, variant, context.UTF8String, [self version] );
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if (contentBytes) {
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content = [NSString stringWithCString:contentBytes encoding:NSUTF8StringEncoding];
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mpw_free_string( contentBytes );
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}
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}];
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return content;
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}
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- (NSString *)storedLoginForSite:(MPStoredSiteEntity *)site usingKey:(MPKey *)key {
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return nil;
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}
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- (NSString *)storedPasswordForSite:(MPStoredSiteEntity *)site usingKey:(MPKey *)key {
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return [self decryptContent:site.contentObject usingKey:key];
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}
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- (BOOL)savePassword:(NSString *)clearContent toSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey {
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NSAssert( [[siteKey keyIDForAlgorithm:site.user.algorithm] isEqualToData:site.user.keyID], @"Site does not belong to current user." );
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switch (site.type) {
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case MPSiteTypeGeneratedMaximum:
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case MPSiteTypeGeneratedLong:
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case MPSiteTypeGeneratedMedium:
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case MPSiteTypeGeneratedBasic:
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case MPSiteTypeGeneratedShort:
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case MPSiteTypeGeneratedPIN:
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case MPSiteTypeGeneratedName:
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case MPSiteTypeGeneratedPhrase: {
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wrn( @"Cannot save content to site with generated type %lu.", (long)site.type );
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return NO;
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}
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case MPSiteTypeStoredPersonal: {
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if (![site isKindOfClass:[MPStoredSiteEntity class]]) {
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wrn( @"Site with stored type %lu is not an MPStoredSiteEntity, but a %@.",
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(long)site.type, [site class] );
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return NO;
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}
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NSData *encryptionKey = [siteKey keyDataForAlgorithm:self trimmedLength:PearlCryptKeySize];
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NSData *encryptedContent = [[clearContent dataUsingEncoding:NSUTF8StringEncoding]
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encryptWithSymmetricKey:encryptionKey padding:YES];
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if ([((MPStoredSiteEntity *)site).contentObject isEqualToData:encryptedContent])
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return NO;
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((MPStoredSiteEntity *)site).contentObject = encryptedContent;
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return YES;
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}
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case MPSiteTypeStoredDevicePrivate: {
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if (![site isKindOfClass:[MPStoredSiteEntity class]]) {
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wrn( @"Site with stored type %lu is not an MPStoredSiteEntity, but a %@.",
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(long)site.type, [site class] );
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return NO;
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}
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NSData *encryptionKey = [siteKey keyDataForAlgorithm:self trimmedLength:PearlCryptKeySize];
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NSData *encryptedContent = [[clearContent dataUsingEncoding:NSUTF8StringEncoding]
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encryptWithSymmetricKey:encryptionKey padding:YES];
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NSDictionary *siteQuery = [self queryForDevicePrivateSiteNamed:site.name];
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if (!encryptedContent)
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[PearlKeyChain deleteItemForQuery:siteQuery];
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else
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[PearlKeyChain addOrUpdateItemForQuery:siteQuery withAttributes:@{
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(__bridge id)kSecValueData: encryptedContent,
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#if TARGET_OS_IPHONE
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(__bridge id)kSecAttrAccessible : (__bridge id)kSecAttrAccessibleWhenUnlockedThisDeviceOnly,
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#endif
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}];
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((MPStoredSiteEntity *)site).contentObject = nil;
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return YES;
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}
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}
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Throw( @"Unsupported type: %ld", (long)site.type );
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}
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- (NSString *)resolveLoginForSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey {
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dispatch_group_t group = dispatch_group_create();
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dispatch_group_enter( group );
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__block NSString *result = nil;
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[self resolveLoginForSite:site usingKey:siteKey result:^(NSString *result_) {
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result = result_;
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dispatch_group_leave( group );
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}];
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dispatch_group_wait( group, DISPATCH_TIME_FOREVER );
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return result;
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}
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- (NSString *)resolvePasswordForSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey {
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dispatch_group_t group = dispatch_group_create();
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dispatch_group_enter( group );
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__block NSString *result = nil;
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[self resolvePasswordForSite:site usingKey:siteKey result:^(NSString *result_) {
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result = result_;
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dispatch_group_leave( group );
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}];
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dispatch_group_wait( group, DISPATCH_TIME_FOREVER );
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return result;
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}
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- (NSString *)resolveAnswerForSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey {
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dispatch_group_t group = dispatch_group_create();
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dispatch_group_enter( group );
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__block NSString *result = nil;
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[self resolveAnswerForSite:site usingKey:siteKey result:^(NSString *result_) {
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result = result_;
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dispatch_group_leave( group );
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}];
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dispatch_group_wait( group, DISPATCH_TIME_FOREVER );
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return result;
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}
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- (NSString *)resolveAnswerForQuestion:(MPSiteQuestionEntity *)question usingKey:(MPKey *)siteKey {
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dispatch_group_t group = dispatch_group_create();
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dispatch_group_enter( group );
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__block NSString *result = nil;
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[self resolveAnswerForQuestion:question usingKey:siteKey result:^(NSString *result_) {
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result = result_;
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dispatch_group_leave( group );
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}];
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dispatch_group_wait( group, DISPATCH_TIME_FOREVER );
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return result;
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}
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- (void)resolveLoginForSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey result:(void ( ^ )(NSString *result))resultBlock {
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NSAssert( [[siteKey keyIDForAlgorithm:site.user.algorithm] isEqualToData:site.user.keyID], @"Site does not belong to current user." );
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NSString *name = site.name;
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BOOL loginGenerated = site.loginGenerated && [[MPAppDelegate_Shared get] isFeatureUnlocked:MPProductGenerateLogins];
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NSString *loginName = site.loginName;
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id<MPAlgorithm> algorithm = nil;
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if (!name.length)
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err( @"Missing name." );
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else if (!siteKey)
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err( @"Missing key." );
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else
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algorithm = site.algorithm;
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dispatch_async( dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0 ), ^{
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resultBlock( loginName || !loginGenerated? loginName:
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[algorithm generateLoginForSiteNamed:name usingKey:siteKey] );
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} );
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}
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- (void)resolvePasswordForSite:(MPSiteEntity *)site usingKey:(MPKey *)siteKey result:(void ( ^ )(NSString *result))resultBlock {
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NSAssert( [[siteKey keyIDForAlgorithm:site.user.algorithm] isEqualToData:site.user.keyID], @"Site does not belong to current user." );
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switch (site.type) {
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case MPSiteTypeGeneratedMaximum:
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case MPSiteTypeGeneratedLong:
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case MPSiteTypeGeneratedMedium:
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case MPSiteTypeGeneratedBasic:
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case MPSiteTypeGeneratedShort:
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case MPSiteTypeGeneratedPIN:
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case MPSiteTypeGeneratedName:
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case MPSiteTypeGeneratedPhrase: {
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if (![site isKindOfClass:[MPGeneratedSiteEntity class]]) {
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wrn( @"Site with generated type %lu is not an MPGeneratedSiteEntity, but a %@.",
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(long)site.type, [site class] );
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break;
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}
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NSString *name = site.name;
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MPSiteType type = site.type;
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NSUInteger counter = ((MPGeneratedSiteEntity *)site).counter;
|
|
id<MPAlgorithm> algorithm = nil;
|
|
if (!site.name.length)
|
|
err( @"Missing name." );
|
|
else if (!siteKey)
|
|
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 keyIDForAlgorithm:site.user.algorithm] 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)
|
|
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 keyIDForAlgorithm:question.site.user.algorithm] 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)
|
|
err( @"Missing key." );
|
|
else if ([[MPAppDelegate_Shared get] isFeatureUnlocked:MPProductGenerateAnswers])
|
|
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 keyIDForAlgorithm:site.user.algorithm] 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 keyIDForAlgorithm:self] isEqualToData:[siteKey keyIDForAlgorithm:self]])
|
|
((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 keyIDForAlgorithm:site.user.algorithm] 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 keyIDForAlgorithm:site.user.algorithm] 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]) {
|
|
NSData *encryptionKey = [key keyDataForAlgorithm:self trimmedLength:PearlCryptKeySize];
|
|
decryptedContent = [encryptedContent decryptWithSymmetricKey:encryptionKey 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 & MPSiteTypeClassGenerated))
|
|
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
|