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POJava Security - RSA Public Key & Private Key Code Issue
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  1. POJava Security - RSA Public Key & Private Key Code Issue
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    copied!<p>Here is my error </p> <pre><code>java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: IOException: DerInputStream.getLength(): lengthTag=127, too big. at sun.security.rsa.RSAKeyFactory.engineGeneratePublic(Unknown Source) at java.security.KeyFactory.generatePublic(Unknown Source) at com.sanjaya.rsa.PublicKeyReader.get(PublicKeyReader.java:22) at com.sanjaya.rsa.MainKeyClass.main(MainKeyClass.java:8) Caused by: java.security.InvalidKeyException: IOException: DerInputStream.getLength(): lengthTag=127, too big. at sun.security.x509.X509Key.decode(Unknown Source) at sun.security.x509.X509Key.decode(Unknown Source) at sun.security.rsa.RSAPublicKeyImpl.&lt;init&gt;(Unknown Source) at sun.security.rsa.RSAKeyFactory.generatePublic(Unknown Source) ... 4 more </code></pre> <p>Here is my code - <strong>MAIN CLASS</strong></p> <pre><code>public static void main(String[] args) { PublicKeyReader publicKeyReader=new PublicKeyReader(); try { publicKeyReader.get("c:\\public.key"); } catch (Exception e) { e.printStackTrace(); } PrivateKeyReader privateKeyReader=new PrivateKeyReader(); try { privateKeyReader.get("c:\\private.key"); } catch (Exception e) { e.printStackTrace(); } </code></pre> <p>Here is public key related method</p> <pre><code> public static PublicKey get(String filename) throws Exception { File f = new File(filename); FileInputStream fis = new FileInputStream(f); DataInputStream dis = new DataInputStream(fis); byte[] keyBytes = new byte[(int)f.length()]; dis.readFully(keyBytes); dis.close(); X509EncodedKeySpec spec =new X509EncodedKeySpec(keyBytes); KeyFactory kf = KeyFactory.getInstance("RSA"); return kf.generatePublic(spec); } </code></pre> <p>Here is private key related method </p> <pre><code> public static PrivateKey get(String filename)throws Exception { File f = new File(filename); FileInputStream fis = new FileInputStream(f); DataInputStream dis = new DataInputStream(fis); byte[] keyBytes = new byte[(int)f.length()]; dis.readFully(keyBytes); dis.close(); PKCS8EncodedKeySpec spec =new PKCS8EncodedKeySpec(keyBytes); KeyFactory kf = KeyFactory.getInstance("RSA"); return kf.generatePrivate(spec); } </code></pre> <p>Please help me to sort out this issue</p> <p>Need to create public key &amp; private key &amp; Encrypt ,decrypt string from those under RSA encyption</p>
 

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