1 files changed, 265 insertions, 0 deletions
diff --git a/xcode/OLMKit/OLMAccount.m b/xcode/OLMKit/OLMAccount.m
new file mode 100644
index 0000000..af1e308
--- /dev/null
+++ b/xcode/OLMKit/OLMAccount.m
@@ -0,0 +1,265 @@
+/*
+ Copyright 2016 Chris Ballinger
+ Copyright 2016 OpenMarket Ltd
+ Copyright 2016 Vector Creations Ltd
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ */
+
+#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);
+    [random resetBytesInRange:NSMakeRange(0, random.length)];
+    if (accountResult == olm_error()) {
+        const char *error = olm_account_last_error(_account);
+        NSLog(@"error creating account: %s", error);
+        return nil;
+    }
+    return self;
+}
+
+- (NSUInteger) 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;
+}
+
+- (NSString *)signMessage:(NSData *)messageData {
+    size_t signatureLength = olm_account_signature_length(_account);
+    uint8_t *signatureBytes = malloc(signatureLength);
+    if (!signatureBytes) {
+        return nil;
+    }
+
+    size_t result = olm_account_sign(_account, messageData.bytes, messageData.length, signatureBytes, signatureLength);
+    if (result == olm_error()) {
+        const char *error = olm_account_last_error(_account);
+        NSLog(@"error signing message: %s", error);
+        free(signatureBytes);
+        return nil;
+    }
+
+    NSData *signatureData = [NSData dataWithBytesNoCopy:signatureBytes length:signatureLength freeWhenDone:YES];
+    return [[NSString alloc] initWithData:signatureData encoding:NSUTF8StringEncoding];
+}
+
+- (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);
+    [random resetBytesInRange:NSMakeRange(0, 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 NO;
+    }
+    size_t result = olm_remove_one_time_keys(self.account, session.session);
+    if (result == olm_error()) {
+        const char *error = olm_account_last_error(_account);
+        NSLog(@"olm_remove_one_time_keys error: %s", error);
+        return NO;
+    }
+    return YES;
+}
+
+- (void)markOneTimeKeysAsPublished
+{
+    olm_account_mark_keys_as_published(self.account);
+}
+
+#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:OLMErrorDomain 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:OLMErrorDomain 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:OLMErrorDomain 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