Java Security

Hi,

I'm trying to get a print out the public key as a String, which I am getting it in as a base64 encoded, but I get error:

Exception in thread "main" java.lang.IllegalArgumentException: Illegal character in Base64 encoded data.

Code below:

public static void main(String[] args) {
		File pubKeyFile = new File("C:\\usercert.pem");
		StringBuffer buffer = new StringBuffer();
		
			try {
				FileInputStream fis = new FileInputStream(pubKeyFile);
				try {
					InputStreamReader isr = new InputStreamReader(fis, "UTF8");
					Reader in = new BufferedReader(isr);
					int ch;
					while((ch = in.read()) > -1) {
						buffer.append((char)ch);
					}
					in.close();
					String key = buffer.toString();
					System.out.println("key is: " + key);

                                       //This is where the code fails:
					String keyDecode = Base64.decodeString(key);
					System.out.println("key ecode is: " + keyDecode);
				} catch (UnsupportedEncodingException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}