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RSA Encryption Decryption

Unusual Unicorn answered on February 20, 2022 Popularity 10/10 Helpfulness 1/10

answer RSA Encryption Decryption

related RSA Decryption

RSA Encryption Decryption

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public static void main(String[] args) {

    byte[] txt = "message".getBytes();
    byte[] encText;
    try{

        // Load the keystore
        KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
        char[] password = "keystorePassword".toCharArray();

        Key rsakey = ks.getKey("mykeyalias", password);
        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");

        // Encrypt
        Certificate cert = ks.getCertificate("mykeyalias");
        try
        {
            cipher.init(Cipher.ENCRYPT_MODE, cert.getPublicKey());
            encText = cipher.doFinal(txt);
            System.out.println(encText.toString());
        }
        catch (Throwable e)
        {
            e.printStackTrace();
            return;
        }

        // Decrypt
        cipher.init(Cipher.DECRYPT_MODE, rsakey);
        String decrypted = new String(cipher.doFinal(encText));
        System.out.println(decrypted);


    } catch (Exception e) {
        System.out.println("error" + e);
    }

Popularity 10/10 Helpfulness 1/10 Language whatever

Source: stackoverflow.com

Tags: encryption rsa whatever

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Contributed on Apr 11 2023

Unusual Unicorn

0 Answers Avg Quality 2/10

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RSA Decryption

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from Crypto.PublicKey import RSA
from Crypto.Cipher import AES, PKCS1_OAEP

file_in = open("encrypted_data.bin", "rb")

private_key = RSA.import_key(open("private.pem").read())

enc_session_key, nonce, tag, ciphertext = \
   [ file_in.read(x) for x in (private_key.size_in_bytes(), 16, 16, -1) ]

# Decrypt the session key with the private RSA key
cipher_rsa = PKCS1_OAEP.new(private_key)
session_key = cipher_rsa.decrypt(enc_session_key)

# Decrypt the data with the AES session key
cipher_aes = AES.new(session_key, AES.MODE_EAX, nonce)
data = cipher_aes.decrypt_and_verify(ciphertext, tag)
print(data.decode("utf-8"))

Popularity 10/10 Helpfulness 2/10 Language python

Source: pycryptodome.readthedocs.io

Tags: python py

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Contributed on Feb 20 2022

Fantastic Fowl

0 Answers Avg Quality 2/10

RSA Encryption Decryption

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