Merge pull request #70 from matrix-org/manuroe/objc_pk

OLMKit: Add objc wrappers for pk encryption/decryption

1 files changed, 107 insertions, 0 deletions

diff --git a/xcode/OLMKitTests/OLMKitPkTests.m b/xcode/OLMKitTests/OLMKitPkTests.m
new file mode 100644
index 0000000..04d2e30
--- /dev/null
+++ b/xcode/OLMKitTests/OLMKitPkTests.m
@@ -0,0 +1,107 @@
+/*
+ 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 <XCTest/XCTest.h>
+#import <OLMKit/OLMKit.h>
+
+/**
+ Tests are inspired from js tests.
+ */
+@interface OLMKitPkTests : XCTestCase {
+    OLMPkEncryption *encryption;
+    OLMPkDecryption *decryption;
+}
+
+@end
+
+@implementation OLMKitPkTests
+
+- (void)setUp {
+    encryption = [OLMPkEncryption new];
+    decryption = [OLMPkDecryption new];
+}
+
+- (void)tearDown {
+    encryption = nil;
+    decryption = nil;
+}
+
+- (void)testImportExportKeys {
+    UInt8 alicePrivateBytes[] = {
+                            0x77, 0x07, 0x6D, 0x0A, 0x73, 0x18, 0xA5, 0x7D,
+                            0x3C, 0x16, 0xC1, 0x72, 0x51, 0xB2, 0x66, 0x45,
+                            0xDF, 0x4C, 0x2F, 0x87, 0xEB, 0xC0, 0x99, 0x2A,
+                            0xB1, 0x77, 0xFB, 0xA5, 0x1D, 0xB9, 0x2C, 0x2A
+    };
+
+    NSData *alicePrivate = [NSData dataWithBytes:alicePrivateBytes length:sizeof(alicePrivateBytes)];
+
+    NSError *error;
+    NSString *alicePublic = [decryption setPrivateKey:alicePrivate error:&error];
+    XCTAssertNil(error);
+    XCTAssertEqualObjects(alicePublic, @"hSDwCYkwp1R0i33ctD73Wg2/Og0mOBr066SpjqqbTmo");
+
+    NSData *alicePrivateOut = decryption.privateKey;
+    XCTAssertNil(error);
+    XCTAssertEqualObjects(alicePrivateOut, alicePrivate);
+}
+
+- (void)testEncryptAndDecrypt {
+
+    NSString *pubKey = [decryption generateKey:nil];
+    NSLog(@"Ephemeral Key: %@", pubKey);
+    XCTAssertNotNil(pubKey);
+
+    NSString *TEST_TEXT = @"têst1";
+    NSError *error;
+    [encryption setRecipientKey:pubKey];
+    OLMPkMessage *message = [encryption encryptMessage:TEST_TEXT error:&error];
+    NSLog(@"message: %@ %@ %@", message.ciphertext, message.mac, message.ephemeralKey);
+    XCTAssertNil(error);
+    XCTAssertNotNil(message);
+    XCTAssertNotNil(message.ciphertext);
+    XCTAssertNotNil(message.mac);
+    XCTAssertNotNil(message.ephemeralKey);
+
+    NSString *decrypted = [decryption decryptMessage:message error:&error];
+    XCTAssertNil(error);
+    XCTAssertEqualObjects(decrypted, TEST_TEXT);
+
+    TEST_TEXT = @"hot beverage: ☕";
+    [encryption setRecipientKey:pubKey];
+    message = [encryption encryptMessage:TEST_TEXT error:&error];
+    decrypted = [decryption decryptMessage:message error:&error];
+    XCTAssertEqualObjects(decrypted, TEST_TEXT);
+}
+
+- (void)testOLMPkDecryptionSerialization {
+    NSString *TEST_TEXT = @"têst1";
+    NSString *pubKey = [decryption generateKey:nil];
+    [encryption setRecipientKey:pubKey];
+    OLMPkMessage *encrypted = [encryption encryptMessage:TEST_TEXT error:nil];
+
+
+    NSData *pickle = [NSKeyedArchiver archivedDataWithRootObject:decryption];
+    decryption = nil;
+
+    OLMPkDecryption *newDecryption = [NSKeyedUnarchiver unarchiveObjectWithData:pickle];
+
+    NSError *error;
+    NSString *decrypted = [newDecryption decryptMessage:encrypted error:&error];
+    XCTAssertEqualObjects(decrypted, TEST_TEXT);
+}
+
+@end