mirror of https://git.matrix.org/git/olm.git
110 lines
2.7 KiB
Objective-C
110 lines
2.7 KiB
Objective-C
//
|
|
// OLMUtility.m
|
|
// olm
|
|
//
|
|
// Created by Chris Ballinger on 4/8/16.
|
|
//
|
|
//
|
|
|
|
#import "OLMUtility.h"
|
|
|
|
#include "olm/olm.h"
|
|
|
|
@interface OLMUtility()
|
|
|
|
@property (nonatomic) OlmUtility *utility;
|
|
|
|
@end
|
|
|
|
@implementation OLMUtility
|
|
|
|
- (void) dealloc {
|
|
olm_clear_utility(_utility);
|
|
free(_utility);
|
|
}
|
|
|
|
- (BOOL) initializeUtilityMemory {
|
|
size_t utilitySize = olm_utility_size();
|
|
_utility = malloc(utilitySize);
|
|
NSParameterAssert(_utility != nil);
|
|
if (!_utility) {
|
|
return NO;
|
|
}
|
|
_utility = olm_utility(_utility);
|
|
NSParameterAssert(_utility != nil);
|
|
if (!_utility) {
|
|
return NO;
|
|
}
|
|
return YES;
|
|
}
|
|
|
|
- (instancetype) init {
|
|
self = [super init];
|
|
if (!self) {
|
|
return nil;
|
|
}
|
|
BOOL success = [self initializeUtilityMemory];
|
|
if (!success) {
|
|
return nil;
|
|
}
|
|
return self;
|
|
}
|
|
|
|
- (NSString *)sha256:(NSData *)message {
|
|
size_t length = olm_sha256_length(_utility);
|
|
|
|
NSMutableData *shaData = [NSMutableData dataWithLength:length];
|
|
if (!shaData) {
|
|
return nil;
|
|
}
|
|
|
|
size_t result = olm_sha256(_utility, message.bytes, message.length, shaData.mutableBytes, shaData.length);
|
|
if (result == olm_error()) {
|
|
const char *error = olm_utility_last_error(_utility);
|
|
NSAssert(NO, @"olm_sha256 error: %s", error);
|
|
return nil;
|
|
}
|
|
|
|
NSString *sha = [[NSString alloc] initWithData:shaData encoding:NSUTF8StringEncoding];
|
|
return sha;
|
|
}
|
|
|
|
- (BOOL)verifyEd25519Signature:(NSString*)signature key:(NSString*)key message:(NSData*)message error:(NSError**)error {
|
|
|
|
NSData *keyData = [key dataUsingEncoding:NSUTF8StringEncoding];
|
|
NSData *signatureData = [signature dataUsingEncoding:NSUTF8StringEncoding];
|
|
|
|
size_t result = olm_ed25519_verify(_utility,
|
|
keyData.bytes, keyData.length,
|
|
message.bytes, message.length,
|
|
signatureData.bytes, signatureData.length
|
|
);
|
|
|
|
if (result == olm_error()) {
|
|
if (error) {
|
|
NSDictionary *userInfo = @{NSLocalizedFailureReasonErrorKey: [NSString stringWithUTF8String:olm_utility_last_error(_utility)]};
|
|
|
|
// @TODO
|
|
*error = [[NSError alloc] initWithDomain:@"OLMKitErrorDomain" code:0 userInfo:userInfo];
|
|
}
|
|
return NO;
|
|
}
|
|
else {
|
|
return YES;
|
|
}
|
|
}
|
|
|
|
+ (NSMutableData*) randomBytesOfLength:(NSUInteger)length {
|
|
NSMutableData *randomData = [NSMutableData dataWithLength:length];
|
|
if (!randomData) {
|
|
return nil;
|
|
}
|
|
int result = SecRandomCopyBytes(kSecRandomDefault, randomData.length, randomData.mutableBytes);
|
|
if (result != 0) {
|
|
return nil;
|
|
}
|
|
return randomData;
|
|
}
|
|
|
|
@end
|