I have following steps to perform for decryption
- base64 decode the response
- Decrypt the first 128 bytes with the RSA1024 public key. Key is in base64 encoded X509 format with PKCS1 padding.
My code looks like this:
$decodedString = $this->base64UrlDecode($string); //does proper url decoding
$publicKey = file_get_contents("public.key",true);
$pub_key = openssl_get_publickey($publicKey);
openssl_public_decrypt($decodedString,$decrypted,$pub_key,OPENSSL_PKCS1_PADDING);
var_dump($decrypted);
I am not able to get anything in $decrypted variable. If I try to base64 decode public key before using it, I am getting error of not a valid public key. What I am missing or doing wrong to achieve mentioned 2 steps?