Java Requires Chilkat v11.0.0+

RSA Decrypt using PEM

See more RSA Examples

This example demonstrates decryping RSA encrypted data that is base64 encoded. It uses a private key loaded from a PEM file. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.PrivateKey;
import com.chilkatsoft.chilkat2.Rsa;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example assumes the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Rsa rsa = new Rsa();

        PrivateKey key = new PrivateKey();

        // Load an RSA private key from an unencrypted PEM file:
        // (To load from an encrypted PEM file, call LoadEncryptedPemFile instead.)

        try {
            key.loadPemFile("qa_data/rsa/decryptTest/priv.pem");

            // Make the key available to the RSA object
            rsa.usePrivateKey(key);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        String encryptedStr = "pP9XFJEsGgxPNHEgNiLB5H5ksCOXDk/G49BPTog1jKLAhYofV4UTH5k2TOYiqRnDnKs8+8uPoN/IxdiGXvuYG8HRzN0HtkhoZO/AxeyaB9S7eddCUlT0Pl2PEB2yQ9HG5rM7jqYOD6MAM4cuX7hqT8fa8tbzJzmBwdfFDBz94bwQjULHiO+gklIBC4vhkXT4yjuvEjxTAKU6tJeZYkBooJNdS/vE5RZRpuF6bGZU41Qc17qFR+iReBq+9f8IMmw8WR8fMbOCaygOfFS1nw7JVsIMGsAIXS8rUaJ/2DfGPfQx5HCiVtTOreGYRUI3esAQjnvUCnavZyQgs53nl7e2aA==";

        rsa.setEncodingMode("base64");

        boolean usePrivateKey = true;
        String decryptedStr = rsa.decryptStringENC(encryptedStr, usePrivateKey);

        System.out.println("Decrypted:");
        System.out.println(decryptedStr);
    }
}