Help with RSA signature

[Aleph72]

Hello, I'm using this framework to generate the key pair and sign a message. I'm creating the key pair with: self.rsaKeyFactory = [[MIHRSAKeyFactory alloc] init]; self.rsaKeyFactory.preferedKeySize = MIHRSAKey1024; self.keyPair = [self.rsaKeyFactory generateKeyPair];

and then sign with:

• (NSString )signMessageData:(NSData )data withKey:(MIHRSAPrivateKey )privKey { NSError signingError = nil; NSData signatureData = [privKey signWithSHA256:data error:&signingError]; if (signingError != nil) { NSLog(@"Error al firmar el mensaje: %@", signingError.localizedDescription); } NSString signString = [signatureData MIH_base64EncodedString]; return signString; }

For what I know, signing with a 1024 private key should give a 128byte signature, but I get just 86 bytes. I've been told to generate a 128 bytes signature, so any help would be really apreciated.

Thanks.

[Aleph72]

I'll answer myself this time. The problem was the line "NSString *signString = [signatureData MIH_base64EncodedString];" signatureData is exactly 128 byte, so I changed the method to return directly the NSData instead of converting it back to a NSString.