A string encrypted in Ruby gives: "BadPaddingException" when decrypted in Java

Question

I am using the following Ruby code to encrypt a string

require 'openssl'
require 'base64'

public_key = OpenSSL::PKey::RSA.new(File.read('public_key'))

Base64.encode64(public_key.public_encrypt('Some random string that I want to encrypt.'))

I need to pass the ciphertext in the API request, and at the end of the API I get the following error (after reading the API logs):

javax.crypto.BadPaddingException: Decryption error

Now I am faced with numerous questions in Stackoverflow, but given my Ruby code, I am mistaken that the ciphertext cannot be decrypted at the end of the API. Obviously, Java is used at the end of the API.

I am completely zero when it comes to encryption, but through encryption and decryption in Ruby I made sure that the implementation is correct in Ruby. The problem occurs when text encrypted through the Ruby language is decrypted through Java at the end of the API.

Answer 1

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Answer 2

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Answer 3

'PKCS1 padding 11 .

, 11

For 1024-bit RSA keys, the encryption size is usually 117 and the decryption buffer size is 128.