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//
// OLMAccount.m
// olm
//
// Created by Chris Ballinger on 4/8/16.
//
//
#import "OLMAccount.h"
#import "OLMAccount_Private.h"
#import "OLMSession.h"
#import "OLMSession_Private.h"
#import "OLMUtility.h"
@import Security;
@implementation OLMAccount
- (void) dealloc {
olm_clear_account(_account);
free(_account);
}
- (BOOL) initializeAccountMemory {
size_t accountSize = olm_account_size();
_account = malloc(accountSize);
NSParameterAssert(_account != nil);
if (!_account) {
return NO;
}
_account = olm_account(_account);
NSParameterAssert(_account != nil);
if (!_account) {
return NO;
}
return YES;
}
- (instancetype) init {
self = [super init];
if (!self) {
return nil;
}
BOOL success = [self initializeAccountMemory];
if (!success) {
return nil;
}
return self;
}
- (instancetype) initNewAccount {
self = [self init];
if (!self) {
return nil;
}
size_t randomLength = olm_create_account_random_length(_account);
NSMutableData *random = [OLMUtility randomBytesOfLength:randomLength];
size_t accountResult = olm_create_account(_account, random.mutableBytes, random.length);
if (accountResult == olm_error()) {
const char *error = olm_account_last_error(_account);
NSLog(@"error creating account: %s", error);
return nil;
}
return self;
}
- (size_t) maxOneTimeKeys {
return olm_account_max_number_of_one_time_keys(_account);
}
/** public identity keys */
- (NSDictionary*) identityKeys {
size_t identityKeysLength = olm_account_identity_keys_length(_account);
uint8_t *identityKeysBytes = malloc(identityKeysLength);
if (!identityKeysBytes) {
return nil;
}
size_t result = olm_account_identity_keys(_account, identityKeysBytes, identityKeysLength);
if (result == olm_error()) {
const char *error = olm_account_last_error(_account);
NSLog(@"error getting id keys: %s", error);
free(identityKeysBytes);
return nil;
}
NSData *idKeyData = [NSData dataWithBytesNoCopy:identityKeysBytes length:identityKeysLength freeWhenDone:YES];
NSError *error = nil;
NSDictionary *keysDictionary = [NSJSONSerialization JSONObjectWithData:idKeyData options:0 error:&error];
if (error) {
NSLog(@"Could not decode JSON: %@", error.localizedDescription);
}
return keysDictionary;
}
- (NSDictionary*) oneTimeKeys {
size_t otkLength = olm_account_one_time_keys_length(_account);
uint8_t *otkBytes = malloc(otkLength);
if (!otkBytes) {
return nil;
}
size_t result = olm_account_one_time_keys(_account, otkBytes, otkLength);
if (result == olm_error()) {
const char *error = olm_account_last_error(_account);
NSLog(@"error getting id keys: %s", error);
free(otkBytes);
}
NSData *otk = [NSData dataWithBytesNoCopy:otkBytes length:otkLength freeWhenDone:YES];
NSError *error = nil;
NSDictionary *keysDictionary = [NSJSONSerialization JSONObjectWithData:otk options:0 error:&error];
if (error) {
NSLog(@"Could not decode JSON: %@", error.localizedDescription);
}
return keysDictionary;
}
- (void) generateOneTimeKeys:(NSUInteger)numberOfKeys {
size_t randomLength = olm_account_generate_one_time_keys_random_length(_account, numberOfKeys);
NSMutableData *random = [OLMUtility randomBytesOfLength:randomLength];
size_t result = olm_account_generate_one_time_keys(_account, numberOfKeys, random.mutableBytes, random.length);
if (result == olm_error()) {
const char *error = olm_account_last_error(_account);
NSLog(@"error generating keys: %s", error);
}
}
- (BOOL) removeOneTimeKeysForSession:(OLMSession *)session {
NSParameterAssert(session != nil);
if (!session) {
return nil;
}
size_t result = olm_remove_one_time_keys(self.account, session.session);
if (result == olm_error()) {
const char *error = olm_session_last_error(session.session);
NSAssert(NO, @"olm_remove_one_time_keys error: %s", error);
return NO;
}
return YES;
}
#pragma mark OLMSerializable
/** Initializes from encrypted serialized data. Will throw error if invalid key or invalid base64. */
- (instancetype) initWithSerializedData:(NSString*)serializedData key:(NSData*)key error:(NSError**)error {
self = [self init];
if (!self) {
return nil;
}
NSParameterAssert(key.length > 0);
NSParameterAssert(serializedData.length > 0);
if (key.length == 0 || serializedData.length == 0) {
if (error) {
*error = [NSError errorWithDomain:@"org.matrix.olm" code:0 userInfo:@{NSLocalizedDescriptionKey: @"Bad length."}];
}
return nil;
}
NSMutableData *pickle = [serializedData dataUsingEncoding:NSUTF8StringEncoding].mutableCopy;
size_t result = olm_unpickle_account(_account, key.bytes, key.length, pickle.mutableBytes, pickle.length);
if (result == olm_error()) {
const char *olm_error = olm_account_last_error(_account);
NSString *errorString = [NSString stringWithUTF8String:olm_error];
if (error && errorString) {
*error = [NSError errorWithDomain:@"org.matrix.olm" code:0 userInfo:@{NSLocalizedDescriptionKey: errorString}];
}
return nil;
}
return self;
}
/** Serializes and encrypts object data, outputs base64 blob */
- (NSString*) serializeDataWithKey:(NSData*)key error:(NSError**)error {
NSParameterAssert(key.length > 0);
size_t length = olm_pickle_account_length(_account);
NSMutableData *pickled = [NSMutableData dataWithLength:length];
size_t result = olm_pickle_account(_account, key.bytes, key.length, pickled.mutableBytes, pickled.length);
if (result == olm_error()) {
const char *olm_error = olm_account_last_error(_account);
NSString *errorString = [NSString stringWithUTF8String:olm_error];
if (error && errorString) {
*error = [NSError errorWithDomain:@"org.matrix.olm" code:0 userInfo:@{NSLocalizedDescriptionKey: errorString}];
}
return nil;
}
NSString *pickleString = [[NSString alloc] initWithData:pickled encoding:NSUTF8StringEncoding];
return pickleString;
}
#pragma mark NSSecureCoding
+ (BOOL) supportsSecureCoding {
return YES;
}
#pragma mark NSCoding
- (id)initWithCoder:(NSCoder *)decoder {
NSString *version = [decoder decodeObjectOfClass:[NSString class] forKey:@"version"];
NSError *error = nil;
if ([version isEqualToString:@"1"]) {
NSString *pickle = [decoder decodeObjectOfClass:[NSString class] forKey:@"pickle"];
NSData *key = [decoder decodeObjectOfClass:[NSData class] forKey:@"key"];
self = [self initWithSerializedData:pickle key:key error:&error];
}
NSParameterAssert(error == nil);
NSParameterAssert(self != nil);
if (!self) {
return nil;
}
return self;
}
- (void)encodeWithCoder:(NSCoder *)encoder {
NSData *key = [OLMUtility randomBytesOfLength:32];
NSError *error = nil;
NSString *pickle = [self serializeDataWithKey:key error:&error];
NSParameterAssert(pickle.length > 0 && error == nil);
[encoder encodeObject:pickle forKey:@"pickle"];
[encoder encodeObject:key forKey:@"key"];
[encoder encodeObject:@"1" forKey:@"version"];
}
@end
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