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POjava.security.InvalidAlgorithmParameterException: in RC6 as well as RC2
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  1. POjava.security.InvalidAlgorithmParameterException: in RC6 as well as RC2
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    copied!<p>I'm new to security, and I tried a lot to remove the exception (below the code). Both the RC2 and RC6 ciphers are giving this exception. The input should be a 128 bit <code>String</code> and a key of 128 bits, the output should be 128 bits cipher text.</p> <pre><code>import java.security.spec.AlgorithmParameterSpec; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import java.util.*; public class RC2Encrypt { public static void main(String args []) throws Exception { Scanner s=new Scanner(System.in); System.out.println("Enter PlainTextString:"); String input=s.nextLine(); System.out.println(); System.out.println("Enter 16 digit key:"); String strPassword=s.nextLine(); SecretKeySpec key = new SecretKeySpec(strPassword.getBytes(), "RC2"); AlgorithmParameterSpec paramSpec = new IvParameterSpec(strPassword.getBytes()); Cipher cipher = Cipher.getInstance("RC2"); cipher.init(Cipher.ENCRYPT_MODE, key, paramSpec); byte[] encrypted = cipher.doFinal(input.getBytes()); String b1 = new String(encrypted); System.out.println("Original string: " + input); System.out.println("Encrypted string: " + b1); } } </code></pre> <hr> <p>This will generate the following exception:</p> <pre><code>Exception in thread "main" java.security.InvalidAlgorithmParameterException: Wrong IV length: must be 8 bytes long at com.sun.crypto.provider.SunJCE_f.a(DashoA13*..) at com.sun.crypto.provider.RC2Cipher.engineInit(DashoA13*..) at javax.crypto.Cipher.a(DashoA13*..) at javax.crypto.Cipher.a(DashoA13*..) at javax.crypto.Cipher.init(DashoA13*..) at javax.crypto.Cipher.init(DashoA13*..) at RC2Encrypt.main(RC2Encrypt.java:40) </code></pre>
 

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