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-rw-r--r--xcode/OLMKit/OLMKit.h1
-rw-r--r--xcode/OLMKit/OLMPkSigning.h49
-rw-r--r--xcode/OLMKit/OLMPkSigning.m123
-rw-r--r--xcode/OLMKitTests/OLMKitPkTests.m35
4 files changed, 208 insertions, 0 deletions
diff --git a/xcode/OLMKit/OLMKit.h b/xcode/OLMKit/OLMKit.h
index 2ed6ebd..54496a0 100644
--- a/xcode/OLMKit/OLMKit.h
+++ b/xcode/OLMKit/OLMKit.h
@@ -28,6 +28,7 @@
#import <OLMKit/OLMOutboundGroupSession.h>
#import <OLMKit/OLMPkEncryption.h>
#import <OLMKit/OLMPkDecryption.h>
+#import <OLMKit/OLMPkSigning.h>
#import <OLMKit/OLMSAS.h>
@interface OLMKit : NSObject
diff --git a/xcode/OLMKit/OLMPkSigning.h b/xcode/OLMKit/OLMPkSigning.h
new file mode 100644
index 0000000..09724e1
--- /dev/null
+++ b/xcode/OLMKit/OLMPkSigning.h
@@ -0,0 +1,49 @@
+/*
+ Copyright 2019 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 <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface OLMPkSigning : NSObject
+
+/**
+ Initialise the signing object with a public/private keypair from a seed.
+
+ @param seed the seed.
+ @param error the error if any.
+ @return the public key
+ */
+- (NSString *)doInitWithSeed:(NSData*)seed error:(NSError* _Nullable *)error;
+
+/**
+ Sign a message.
+
+ @param message the message to sign.
+ @param error the error if any.
+ @return the signature.
+ */
+- (NSString *)sign:(NSString*)message error:(NSError* _Nullable *)error;
+
+/**
+ Generate a seed.
+
+ @return the generated seed.
+ */
++ (NSData *)generateSeed;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/xcode/OLMKit/OLMPkSigning.m b/xcode/OLMKit/OLMPkSigning.m
new file mode 100644
index 0000000..e3f1a61
--- /dev/null
+++ b/xcode/OLMKit/OLMPkSigning.m
@@ -0,0 +1,123 @@
+/*
+ Copyright 2019 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 "OLMPkSigning.h"
+
+#include "olm/olm.h"
+#include "olm/pk.h"
+#include "OLMUtility.h"
+
+@interface OLMPkSigning ()
+{
+ OlmPkSigning *sign;
+}
+@end
+
+@implementation OLMPkSigning
+
+- (void)dealloc {
+ olm_clear_pk_signing(sign);
+ free(sign);
+}
+
+
+- (instancetype)init {
+ self = [super init];
+ if (self) {
+ sign = (OlmPkSigning *)malloc(olm_pk_signing_size());
+ olm_pk_signing(sign);
+ }
+ return self;
+}
+
+- (NSString *)doInitWithSeed:(NSData *)seed error:(NSError *__autoreleasing _Nullable *)error {
+ size_t publicKeyLength = olm_pk_signing_public_key_length();
+ NSMutableData *publicKeyData = [NSMutableData dataWithLength:publicKeyLength];
+ if (!publicKeyData) {
+ return nil;
+ }
+
+ NSMutableData *mutableSeed = [NSMutableData dataWithData:seed];
+
+ size_t result = olm_pk_signing_key_from_seed(sign,
+ publicKeyData.mutableBytes, publicKeyLength,
+ mutableSeed.mutableBytes, mutableSeed.length);
+ if (result == olm_error()) {
+ const char *olm_error = olm_pk_signing_last_error(sign);
+
+ NSString *errorString = [NSString stringWithUTF8String:olm_error];
+ NSLog(@"[OLMPkSigning] doInitWithSeed: olm_pk_signing_key_from_seed error: %@", errorString);
+
+ if (error && olm_error && errorString) {
+ *error = [NSError errorWithDomain:OLMErrorDomain
+ code:0
+ userInfo:@{
+ NSLocalizedDescriptionKey: errorString,
+ NSLocalizedFailureReasonErrorKey: [NSString stringWithFormat:@"olm_pk_signing_key_from_seed error: %@", errorString]
+ }];
+ }
+
+ return nil;
+ }
+
+ NSString *publicKey = [[NSString alloc] initWithData:publicKeyData encoding:NSUTF8StringEncoding];
+ return publicKey;
+}
+
+- (NSString *)sign:(NSString *)message error:(NSError *__autoreleasing _Nullable *)error {
+ NSData *messageData = [message dataUsingEncoding:NSUTF8StringEncoding];
+
+ size_t signatureLength = olm_pk_signature_length();
+ NSMutableData *signatureData = [NSMutableData dataWithLength:signatureLength];
+ if (!signatureData) {
+ return nil;
+ }
+
+ size_t result = olm_pk_sign(sign,
+ messageData.bytes, messageData.length,
+ signatureData.mutableBytes, signatureLength);
+ if (result == olm_error()) {
+ const char *olm_error = olm_pk_signing_last_error(sign);
+
+ NSString *errorString = [NSString stringWithUTF8String:olm_error];
+ NSLog(@"[OLMPkSigning] sign: olm_pk_sign error: %@", errorString);
+
+ if (error && olm_error && errorString) {
+ *error = [NSError errorWithDomain:OLMErrorDomain
+ code:0
+ userInfo:@{
+ NSLocalizedDescriptionKey: errorString,
+ NSLocalizedFailureReasonErrorKey: [NSString stringWithFormat:@"olm_pk_sign error: %@", errorString]
+ }];
+ }
+
+ return nil;
+ }
+
+ NSString *signature = [[NSString alloc] initWithData:signatureData encoding:NSUTF8StringEncoding];
+ return signature;
+}
+
++ (NSData *)generateSeed {
+ size_t seedLength = olm_pk_signing_seed_length();
+ NSMutableData *seed = [OLMUtility randomBytesOfLength:seedLength];
+ if (!seed) {
+ return nil;
+ }
+
+ return seed;
+}
+
+@end
diff --git a/xcode/OLMKitTests/OLMKitPkTests.m b/xcode/OLMKitTests/OLMKitPkTests.m
index 04d2e30..7a09130 100644
--- a/xcode/OLMKitTests/OLMKitPkTests.m
+++ b/xcode/OLMKitTests/OLMKitPkTests.m
@@ -104,4 +104,39 @@
XCTAssertEqualObjects(decrypted, TEST_TEXT);
}
+- (void)testSignAndVerify {
+
+ UInt8 seedBytes[] = {
+ 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 *seed = [NSData dataWithBytes:seedBytes length:sizeof(seedBytes)];
+
+ NSString *TEST_TEXT = @"We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.";
+
+ OLMPkSigning *signing = [OLMPkSigning new];
+
+ NSError *error;
+ NSString *pubKey = [signing doInitWithSeed:seed error:&error];
+ XCTAssertNotNil(pubKey);
+ XCTAssertNil(error);
+
+ NSString *sig = [signing sign:TEST_TEXT error:&error];
+ XCTAssertNotNil(sig);
+ XCTAssertNil(error);
+
+ OLMUtility *util = [OLMUtility new];
+ BOOL verify = [util verifyEd25519Signature:sig key:pubKey message:[TEST_TEXT dataUsingEncoding:NSUTF8StringEncoding] error:&error];
+ XCTAssertTrue(verify);
+ XCTAssertNil(error);
+
+ NSString *badSig = [sig stringByReplacingCharactersInRange:NSMakeRange(0, 1) withString:@"p"];
+ verify = [util verifyEd25519Signature:badSig key:pubKey message:[TEST_TEXT dataUsingEncoding:NSUTF8StringEncoding] error:&error];
+ XCTAssertFalse(verify);
+ XCTAssertNotNil(error);
+}
+
@end
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 15:41:27 +0000