如何使用JSSE实现SSL安全连接

如何使用JSSE实现SSL安全连接(11) try{
certValues.setText(getFingerprint(chain[chainIdx].getEncoded(),"MD5")+"\n"+
getFingerprint(chain[chainIdx].getEncoded(),"SHA1"));
}catch(Exception fingerE) {
certValues.setText("Couldn't calculate fingerprints of the certificate.\nReason: "+fingerE.getMessage());
}
}
}
}

/**
* This method calculates the fingerprint of the certificate. It takes the encoded form of
* the certificate and calculates a hash value from it.
*
* @param certificateBytes In: The byte array of the encoded data.
* @param algorithm In: The algorithm to be used for calculating the hash value.
* Two are possible: MD5 and SHA1
*
* @return: Returns a hex formated string of the fingerprint.
*/

private String getFingerprint(byte[] certificateBytes, String algorithm) throws Exception {
MessageDigest md = MessageDigest.getInstance(algorithm);
md.update(certificateBytes);
byte[] digest = md.digest();
return new String(algorithm+": "+byteArrayToHex(digest));
}

/**
* This method converts a byte array to a hex formatted string.
*
* @param byteData In: The data to be converted.
*
* @return: The formatted string.
*/
private String byteArrayToHex(byte[] byteData) {
StringBuffer sb=new StringBuffer();
for (int i = 0; i < byteData.length; i++) {
if (i != 0) sb.append(":");
int b = byteData[i] & 0xff;
String hex = Integer.toHexString(b);
if (hex.length() == 1) sb.append("0");