The web service I want to consume requires a client certificate. How can I send my certificate to it?
To further elaborate I don't understand how to create the SecIdentityRef.
In my NSURLConnection didReceiveAuthenticationChallenge I've got this conditional after ServerTrust:
else if challenge?.protectionSpace.authenticationMethod == NSURLAuthenticationMethodClientCertificate
{
var secIdent : SecIdentityRef = ?????????
var certCred = NSURLCredential(identity: secIdent, certificates: [getClientCertificate()], persistence: NSURLCredentialPersistence.Permanent)
challenge?.sender.useCredential(certCred, forAuthenticationChallenge: challenge!)
}
The getClientCertificate method:
func getClientCertificate() -> SecCertificateRef
{
let mainBundle : NSBundle = NSBundle.mainBundle()
var mainBund = mainBundle.pathForResource("iosClientCert", ofType: "cer") //exported the cert in der format.
var key : NSData = NSData(contentsOfFile: mainBund!)!
var turnToCert : SecCertificateRef = SecCertificateCreateWithData(kCFAllocatorDefault, key).takeRetainedValue()
return turnToCert;
}
Technically, when someone I know needed the implementation in Swift, he used the following Objective-C implementation in order to get the NSURLCredential object to the connection; based on the private key and X509 Certificate pair contained in a PKCS12 keystore.
Sorry, I don't have access to the source with the Swift solution. All I know is that the NSURLCredential was returned to Swift, and used directly in the http url connection there. It's similar to this one, though.
I'm not an iOS dev so I won't be able to help you out with the "bridging to Swift" part.
- (void)getMessageWithURL:(NSString *)url {
NSURL *URL = [NSURL URLWithString:url];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:URL];
[request setHTTPMethod:@"GET"];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[connection self];
}
- (void)postMessageWithURL:(NSString *)url withContent:(NSString *)content {
NSData *postData = [content dataUsingEncoding:NSUTF8StringEncoding];
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];
NSURL *myURL = [NSURL URLWithString:url];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:myURL cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:60];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[connection self];
}
- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace {
return [protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust];
}
- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
NSLog(@"didReceiveAuthenticationChallenge");
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
responseData = [[NSMutableData alloc] init];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[responseData appendData:data];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
NSLog(@"Unable to fetch data");
NSLog(@"%@", error);
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSLog(@"Succeeded! Received %lu bytes of data", (unsigned long)[responseData
length]);
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
NSLog(@"%@", responseString);
[bridge callHandler:handlerName data:responseString];
}
- (void)connection:(NSURLConnection *)connection willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
/*
Reading the certificate and creating the identity
*/
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = paths[0]; // Get documents directory
NSData *p12data = [CertificateManager getP12Data]; //returns essentially a byte array containing a valid PKCS12 certificate
if (!p12data) {
return;
NSAssert(p12data, @"Couldn't load p12 file...");
}
CFStringRef password = CFSTR("password");
const void *keys[] = {kSecImportExportPassphrase};
const void *values[] = {password};
CFDictionaryRef optionsDictionary = CFDictionaryCreate(NULL, keys, values, 1, NULL, NULL);
CFArrayRef p12Items;
OSStatus result = SecPKCS12Import((__bridge CFDataRef) p12data, optionsDictionary, &p12Items);
if (result == noErr) {
CFDictionaryRef identityDict = CFArrayGetValueAtIndex(p12Items, 0);
SecIdentityRef identityApp = (SecIdentityRef) CFDictionaryGetValue(identityDict, kSecImportItemIdentity);
SecCertificateRef certRef;
SecIdentityCopyCertificate(identityApp, &certRef);
SecCertificateRef certArray[1] = {certRef};
CFArrayRef myCerts = CFArrayCreate(NULL, (void *) certArray, 1, NULL);
CFRelease(certRef);
NSURLCredential *credential = [NSURLCredential credentialWithIdentity:identityApp certificates:nil persistence:NSURLCredentialPersistenceNone];
CFRelease(myCerts);
[[challenge sender] useCredential:credential forAuthenticationChallenge:challenge];
}
else {
// Certificate is invalid or password is invalid given the certificate
NSLog(@"Invalid certificate or password");
NSError *error = [NSError errorWithDomain:NSOSStatusErrorDomain code:result userInfo:nil];
return;
}
}
EDIT: Har har, very funny, downvoting me twice when you yourself didn't bother while the bounty was up. *grumble *
Anyways, to use the following above, you just need to access it from Swift.
func connection(connection: NSURLConnection, willSendRequestForAuthenticationChallenge challenge: NSURLAuthenticationChallenge) {
if let p12Data = UserManager.currentP12,
let credential = CertificateManager.getCredentialsForP12(p12Data) as? NSURLCredential {
challenge.sender.useCredential(credential, forAuthenticationChallenge: challenge)
} else {
UIApplication.sharedApplication().networkActivityIndicatorVisible = false
}
}
That uses this.
+ (id)getCredentialsForP12:(NSData *)p12 {
NSData* p12data = p12;
const void *keys[] = {kSecImportExportPassphrase};
const void *values[] = {CFSTR("thePassword")};
CFDictionaryRef optionsDictionary = CFDictionaryCreate(NULL, keys, values, 1, NULL, NULL);
CFArrayRef p12Items;
OSStatus result = SecPKCS12Import((__bridge CFDataRef) p12data, optionsDictionary, &p12Items);
if (result == noErr) {
CFDictionaryRef identityDict = CFArrayGetValueAtIndex(p12Items, 0);
SecIdentityRef identityApp = (SecIdentityRef) CFDictionaryGetValue(identityDict, kSecImportItemIdentity);
SecCertificateRef certRef;
SecIdentityCopyCertificate(identityApp, &certRef);
SecCertificateRef certArray[1] = {certRef};
CFArrayRef myCerts = CFArrayCreate(NULL, (void *) certArray, 1, NULL);
CFRelease(certRef);
NSURLCredential *credential = [NSURLCredential credentialWithIdentity:identityApp certificates:nil persistence:NSURLCredentialPersistenceNone];
CFRelease(myCerts);
return credential;
}
else {
// Certificate is invalid or password is invalid given the certificate
NSLog(@"Invalid certificate or password");
UIAlertView* av = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Invalid cert or pass" delegate:nil cancelButtonTitle:@"ok" otherButtonTitles: nil];
[av show];
NSError *error = [NSError errorWithDomain:NSOSStatusErrorDomain code:result userInfo:nil];
return nil;
}
EDIT: A swift version of the above is here, although it was messy enough that we rather just didn't use it.
var p12items : Unmanaged<CFArrayRef>?
let index: CFIndex = 1
let password: CFString = "password"
let key = kSecImportExportPassphrase.takeRetainedValue() as String
var values = [unsafeAddressOf(password)]
var keys = [unsafeAddressOf(key)]
var keyCallbacks = kCFTypeDictionaryKeyCallBacks
var valueCallbacks = kCFTypeDictionaryValueCallBacks
let length: CFIndex = p12Data.length
let p12CfData: CFData = CFDataCreate(kCFAllocatorDefault, UnsafePointer<UInt8>(p12Data.bytes), length)
let options = CFDictionaryCreate(kCFAllocatorDefault, &keys, &values, index, &keyCallbacks, &valueCallbacks)
let result = SecPKCS12Import(p12CfData, options, &p12items)
if result == noErr {
let idIndex: CFIndex = 0
var items = p12items?.takeRetainedValue()
var identityDict = CFArrayGetValueAtIndex(items!, idIndex)
var key = kSecImportItemIdentity.takeRetainedValue() as String
var keyAddress = unsafeAddressOf(key)
var identityApp: SecIdentityRef = CFDictionaryGetValue(identityDict, keyAddress)
var certRef : Unmanaged<SecCertificateRef>?
SecIdentityCopyCertificate(identityApp, &certRef)
var cert: SecCertificateRef = certRef!.takeRetainedValue()
var certArray = [unsafeAddressOf(cert)]
var arrayCallback = kCFTypeArrayCallBacks
var myCerts: CFArrayRef = CFArrayCreate(kCFAllocatorDefault, &certArray, index, &arrayCallback);
let credential: NSURLCredential = NSURLCredential(identity: identityApp, certificates: [AnyObject](), persistence: NSURLCredentialPersistence.None)