Verify SHA1withRSA signature generated in Java (Android) with phpseclib

Question

This is what I want to do:

• Generate a 512 bit RSA keypair in Java/Android
• Generate a SHA1withRSA signature for some message in Java

Answer 1

Seems like $_POST['msg'] might need to be base64_decode()'d as well? Also, try doing $rsa->setEncryptionMode(CRYPT_RSA_ENCRYPTION_PKCS1). By default phpseclib does OAEP padding which, although more secure, is not as widely supported nor is it the default for most stuff.