private ssh key authentication on sftp about connectionkit HOT 2 CLOSED

[CK2FileManager URLWithPath:path relativeToURL:ftpServer]

[NSURL URLWithString:@"/Users/<myUserNameOnLocalMachine>/.ssh/id_rsa"]

-(void)fileManager:(CK2FileManager *)manager operation:(CK2FileOperation *)operation didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(CK2AuthChallengeDisposition disposition, NSURLCredential *credential))completionHandler

[[challenge sender] useCredential:C forAuthenticationChallenge:challenge];

-(void)fileManager:(CK2FileManager *)manager operation:(CK2FileOperation *)operation
didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge
completionHandler:(void (^)(CK2AuthChallengeDisposition disposition, NSURLCredential *credential))completionHandler
{
    if (![challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodDefault]) {
        completionHandler(CK2AuthChallengePerformDefaultHandling, nil);
        return;
    }

    NSURLCredential *cred = [NSURLCredential ck2_credentialWithUser:@"<username>"
                                                     publicKeyURL:nil
                                                    privateKeyURL:[NSURL fileURLWithPath:@"/Users/<myUserNameOnLocalMachine>/.ssh/id_rsa"]
                                                         password:nil
                                                      persistence:NSURLCredentialPersistenceForSession];
    completionHandler(CK2AuthChallengeUseCredential, cred);
}