156 lines
4.8 KiB
Objective-C
156 lines
4.8 KiB
Objective-C
//
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// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
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//
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#import "SSKBaseTest.h"
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#import <Curve25519Kit/Curve25519.h>
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#import <SignalCoreKit/Cryptography.h>
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#import <SignalServiceKit/OWSProvisioningCipher.h>
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@interface OWSProvisioningCipher(Testing)
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// Expose private method for testing.
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- (instancetype)initWithTheirPublicKey:(NSData *)theirPublicKey
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ourKeyPair:(ECKeyPair *)ourKeyPair
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initializationVector:(NSData *)initializationVector;
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@end
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@interface OWSProvisioningCipherTest : SSKBaseTest
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@end
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@implementation OWSProvisioningCipherTest
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- (NSData *)knownInitializationVector
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{
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uint8_t initilizationVectorBytes[] = {
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0xec, 0x67, 0x0b, 0xb7,
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0x18, 0xe1, 0xe9, 0x0a,
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0xcc, 0x5e, 0xcb, 0x37,
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0xab, 0x79, 0xe0, 0x09
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};
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return [NSData dataWithBytes:initilizationVectorBytes length:16];
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}
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- (NSData *)knownPublicKey
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{
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uint8_t knownPublicKeyBytes[] = {
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0x5e, 0x23, 0xe8, 0x49,
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0xb2, 0x23, 0x21, 0xdb,
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0x2e, 0x3a, 0x77, 0x74,
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0x6f, 0x3b, 0x44, 0x18,
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0xcc, 0x6c, 0x81, 0xce,
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0xd5, 0xc2, 0x91, 0xaf,
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0xed, 0xfb, 0x21, 0x4e,
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0x59, 0xcc, 0x19, 0xa4
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};
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return [NSData dataWithBytes:knownPublicKeyBytes length: 32];
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}
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- (ECKeyPair *)knownKeyPair
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{
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uint8_t privateKeyBytes[] = {
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0x60, 0xfd, 0xc1, 0xeb,
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0x6a, 0x68, 0x3d, 0x2b,
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0x51, 0x23, 0x1f, 0xea,
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0x1a, 0x5e, 0x80, 0x88,
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0x0c, 0x65, 0x2d, 0x3d,
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0x47, 0x9e, 0x28, 0xc1,
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0x9f, 0x48, 0x2c, 0x66,
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0xde, 0x48, 0x5d, 0x57
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};
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uint8_t publicKeyBytes[] = {
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0x02, 0x62, 0x7b, 0x5c,
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0x21, 0x15, 0x59, 0x1b,
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0x37, 0xd1, 0xfe, 0xeb,
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0x15, 0x5d, 0xd2, 0x95,
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0x0a, 0xce, 0xe8, 0xb2,
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0x1e, 0x8e, 0xc8, 0xd6,
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0x53, 0x4f, 0x1a, 0xcd,
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0xf2, 0x00, 0x98, 0x32
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};
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// Righteous hack to build a deterministic ECKeyPair
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// The publicKey/privateKey ivars are private but it's possible to `initWithCoder:` given the proper keys.
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NSKeyedArchiver *archiver = [NSKeyedArchiver new];
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[archiver encodeBytes:publicKeyBytes length:ECCKeyLength forKey:@"TSECKeyPairPublicKey"];
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[archiver encodeBytes:privateKeyBytes length:ECCKeyLength forKey:@"TSECKeyPairPrivateKey"];
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NSData *serialized = [archiver encodedData];
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NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:serialized];
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return [[ECKeyPair alloc] initWithCoder:unarchiver];
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}
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- (NSData *)knownData
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{
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uint8_t knownBytes[] = {
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0x19, 0x33, 0x78, 0x64,
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0x96, 0x56, 0xa7, 0xd0,
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0x6e, 0xff, 0x37, 0x1d
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};
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return [NSData dataWithBytes:knownBytes length:12];
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}
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- (void)testEncrypt
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{
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NSData *theirPublicKey = [self knownPublicKey];
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ECKeyPair *ourKeyPair = [self knownKeyPair];
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NSData *initializationVector = [self knownInitializationVector];
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OWSProvisioningCipher *cipher = [[OWSProvisioningCipher alloc] initWithTheirPublicKey:theirPublicKey
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ourKeyPair:ourKeyPair
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initializationVector:initializationVector];
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NSData *message = [self knownData];
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NSData *actualOutput = [cipher encrypt:message];
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uint8_t expectedBytes[] = {
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0x01, 0xec, 0x67, 0x0b,
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0xb7, 0x18, 0xe1, 0xe9,
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0x0a, 0xcc, 0x5e, 0xcb,
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0x37, 0xab, 0x79, 0xe0,
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0x09, 0xf7, 0x2b, 0xf7,
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0x14, 0x3d, 0x45, 0xd7,
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0x45, 0x79, 0x1e, 0x4f,
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0x9d, 0x34, 0x8a, 0x2d,
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0x43, 0x64, 0xd4, 0x7d,
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0x48, 0x9a, 0xdc, 0x5a,
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0xc3, 0x72, 0xfa, 0x63,
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0x41, 0x7a, 0xa8, 0x45,
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0x36, 0xe9, 0xc5, 0xcb,
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0xee, 0x9b, 0xc1, 0x1f,
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0xec, 0x31, 0x1e, 0xc2,
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0x33, 0x2d, 0x95, 0x54,
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0xcc
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};
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NSData *expectedOutput = [NSData dataWithBytes:expectedBytes length:65];
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XCTAssertEqualObjects(expectedOutput, actualOutput);
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}
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- (void)testPadding
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{
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NSUInteger kBlockSize = 16;
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for (int i = 0; i <= kBlockSize; i++) {
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NSData *message = [Cryptography generateRandomBytes:i];
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NSData *theirPublicKey = [self knownPublicKey];
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ECKeyPair *ourKeyPair = [self knownKeyPair];
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NSData *initializationVector = [self knownInitializationVector];
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OWSProvisioningCipher *cipher = [[OWSProvisioningCipher alloc] initWithTheirPublicKey:theirPublicKey
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ourKeyPair:ourKeyPair
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initializationVector:initializationVector];
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NSData *actualOutput = [cipher encrypt:message];
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XCTAssertNotNil(actualOutput, @"failed for message length: %d", i);
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}
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}
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@end
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