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Diffstat (limited to 'xcode/OLMKit/OLMPkDecryption.m')
-rw-r--r--xcode/OLMKit/OLMPkDecryption.m299
1 files changed, 0 insertions, 299 deletions
diff --git a/xcode/OLMKit/OLMPkDecryption.m b/xcode/OLMKit/OLMPkDecryption.m
deleted file mode 100644
index 4af2c71..0000000
--- a/xcode/OLMKit/OLMPkDecryption.m
+++ /dev/null
@@ -1,299 +0,0 @@
-/*
- Copyright 2018 New Vector 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 "OLMPkDecryption.h"
-
-#include "olm/olm.h"
-#include "olm/pk.h"
-#include "OLMUtility.h"
-
-@interface OLMPkDecryption ()
-{
- OlmPkDecryption *session;
-}
-@end
-
-@implementation OLMPkDecryption
-
-- (void)dealloc {
- olm_clear_pk_decryption(session);
- free(session);
-}
-
-- (instancetype)init {
- self = [super init];
- if (self) {
- session = (OlmPkDecryption *)malloc(olm_pk_decryption_size());
- olm_pk_decryption(session);
- }
- return self;
-}
-
-- (NSString *)setPrivateKey:(NSData *)privateKey error:(NSError *__autoreleasing _Nullable *)error {
- size_t publicKeyLength = olm_pk_key_length();
- NSMutableData *publicKeyData = [NSMutableData dataWithLength:publicKeyLength];
- if (!publicKeyData) {
- return nil;
- }
-
- size_t result = olm_pk_key_from_private(session,
- publicKeyData.mutableBytes, publicKeyLength,
- (void*)privateKey.bytes, privateKey.length);
- if (result == olm_error()) {
- const char *olm_error = olm_pk_decryption_last_error(session);
- NSLog(@"[OLMPkDecryption] setPrivateKey: olm_pk_key_from_private error: %s", olm_error);
-
- NSString *errorString = [NSString stringWithUTF8String:olm_error];
- if (error && olm_error && errorString) {
- *error = [NSError errorWithDomain:OLMErrorDomain
- code:0
- userInfo:@{
- NSLocalizedDescriptionKey: errorString,
- NSLocalizedFailureReasonErrorKey: [NSString stringWithFormat:@"olm_pk_key_from_private error: %@", errorString]
- }];
- }
- return nil;
- }
-
- NSString *publicKey = [[NSString alloc] initWithData:publicKeyData encoding:NSUTF8StringEncoding];
- return publicKey;
-}
-
-- (NSString *)generateKey:(NSError *__autoreleasing _Nullable *)error {
- size_t randomLength = olm_pk_private_key_length();
- NSMutableData *random = [OLMUtility randomBytesOfLength:randomLength];
- if (!random) {
- return nil;
- }
-
- size_t publicKeyLength = olm_pk_key_length();
- NSMutableData *publicKeyData = [NSMutableData dataWithLength:publicKeyLength];
- if (!publicKeyData) {
- return nil;
- }
-
- size_t result = olm_pk_key_from_private(session,
- publicKeyData.mutableBytes, publicKeyData.length,
- random.mutableBytes, randomLength);
- [random resetBytesInRange:NSMakeRange(0, randomLength)];
- if (result == olm_error()) {
- const char *olm_error = olm_pk_decryption_last_error(session);
- NSLog(@"[OLMPkDecryption] generateKey: olm_pk_key_from_private error: %s", olm_error);
-
- NSString *errorString = [NSString stringWithUTF8String:olm_error];
- if (error && olm_error && errorString) {
- *error = [NSError errorWithDomain:OLMErrorDomain
- code:0
- userInfo:@{
- NSLocalizedDescriptionKey: errorString,
- NSLocalizedFailureReasonErrorKey: [NSString stringWithFormat:@"olm_pk_key_from_private error: %@", errorString]
- }];
- }
- return nil;
- }
-
- NSString *publicKey = [[NSString alloc] initWithData:publicKeyData encoding:NSUTF8StringEncoding];
- return publicKey;
-}
-
-- (NSData *)privateKey {
- size_t privateKeyLength = olm_pk_private_key_length();
- NSMutableData *privateKeyData = [NSMutableData dataWithLength:privateKeyLength];
- if (!privateKeyData) {
- return nil;
- }
-
- size_t result = olm_pk_get_private_key(session,
- privateKeyData.mutableBytes, privateKeyLength);
- if (result == olm_error()) {
- const char *olm_error = olm_pk_decryption_last_error(session);
- NSLog(@"[OLMPkDecryption] privateKey: olm_pk_get_private_key error: %s", olm_error);
- return nil;
- }
-
- NSData *privateKey = [privateKeyData copy];
- [privateKeyData resetBytesInRange:NSMakeRange(0, privateKeyData.length)];
-
- return privateKey;
-}
-
-- (NSString *)decryptMessage:(OLMPkMessage *)message error:(NSError *__autoreleasing _Nullable *)error {
- NSData *messageData = [message.ciphertext dataUsingEncoding:NSUTF8StringEncoding];
- NSData *macData = [message.mac dataUsingEncoding:NSUTF8StringEncoding];
- NSData *ephemeralKeyData = [message.ephemeralKey dataUsingEncoding:NSUTF8StringEncoding];
- if (!messageData || !macData || !ephemeralKeyData) {
- return nil;
- }
-
- NSMutableData *mutMessage = messageData.mutableCopy;
- size_t maxPlaintextLength = olm_pk_max_plaintext_length(session, mutMessage.length);
- if (maxPlaintextLength == olm_error()) {
- const char *olm_error = olm_pk_decryption_last_error(session);
-
- NSString *errorString = [NSString stringWithUTF8String:olm_error];
- NSLog(@"[OLMPkDecryption] decryptMessage: olm_pk_max_plaintext_length error: %@", errorString);
-
- if (error && olm_error && errorString) {
- *error = [NSError errorWithDomain:OLMErrorDomain
- code:0
- userInfo:@{
- NSLocalizedDescriptionKey: errorString,
- NSLocalizedFailureReasonErrorKey: [NSString stringWithFormat:@"olm_pk_max_plaintext_length error: %@", errorString]
- }];
- }
-
- return nil;
- }
-
- mutMessage = messageData.mutableCopy;
- NSMutableData *plaintextData = [NSMutableData dataWithLength:maxPlaintextLength];
- size_t plaintextLength = olm_pk_decrypt(session,
- ephemeralKeyData.bytes, ephemeralKeyData.length,
- macData.bytes, macData.length,
- mutMessage.mutableBytes, mutMessage.length,
- plaintextData.mutableBytes, plaintextData.length);
- if (plaintextLength == olm_error()) {
- const char *olm_error = olm_pk_decryption_last_error(session);
-
- NSString *errorString = [NSString stringWithUTF8String:olm_error];
- NSLog(@"[OLMPkDecryption] decryptMessage: olm_pk_decrypt error: %@", errorString);
-
- if (error && olm_error && errorString) {
- *error = [NSError errorWithDomain:OLMErrorDomain
- code:0
- userInfo:@{
- NSLocalizedDescriptionKey: errorString,
- NSLocalizedFailureReasonErrorKey: [NSString stringWithFormat:@"olm_decrypt error: %@", errorString]
- }];
- }
-
- return nil;
- }
-
- plaintextData.length = plaintextLength;
- NSString *plaintext = [[NSString alloc] initWithData:plaintextData encoding:NSUTF8StringEncoding];
- [plaintextData resetBytesInRange:NSMakeRange(0, plaintextData.length)];
- return plaintext;
-}
-
-+ (NSUInteger)privateKeyLength {
- return olm_pk_private_key_length();
-}
-
-#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 *__autoreleasing *)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;
- }
-
- size_t ephemeralLength = olm_pk_key_length();
- NSMutableData *ephemeralBuffer = [NSMutableData dataWithLength:ephemeralLength];
-
- NSMutableData *pickle = [serializedData dataUsingEncoding:NSUTF8StringEncoding].mutableCopy;
- size_t result = olm_unpickle_pk_decryption(session,
- key.bytes, key.length,
- pickle.mutableBytes, pickle.length,
- ephemeralBuffer.mutableBytes, ephemeralLength);
- [pickle resetBytesInRange:NSMakeRange(0, pickle.length)];
- if (result == olm_error()) {
- const char *olm_error = olm_pk_decryption_last_error(session);
- 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_pk_decryption_length(session);
- NSMutableData *pickled = [NSMutableData dataWithLength:length];
-
- size_t result = olm_pickle_pk_decryption(session,
- key.bytes, key.length,
- pickled.mutableBytes, pickled.length);
- if (result == olm_error()) {
- const char *olm_error = olm_pk_decryption_last_error(session);
- 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];
- [pickled resetBytesInRange:NSMakeRange(0, pickled.length)];
-
- 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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