PKCS#7 Signin and verify sign

Question

I am trying to sign and verify sign using PKCS#7. I am following book beginning cryptography with java. I have written sample code to sign and verify. When i am trying

Answer 1

Try this:

public static void main(String[] args)throws Exception
{
    String password = "123456";

    MessageDigest md = MessageDigest.getInstance("SHA-256");
    md.update(password.getBytes());

    byte byteData[] = md.digest();

    //convert the byte to hex format method 1
    StringBuffer sb = new StringBuffer();
    for (int i = 0; i < byteData.length; i++) {
     sb.append(Integer.toString((byteData[i] & 0xff) + 0x100, 16).substring(1));
    }

    System.out.println("Hex format : " + sb.toString());

    //convert the byte to hex format method 2
    StringBuffer hexString = new StringBuffer();
    for (int i=0;i