public boolean isPasswordValid(String encPassword, String inputPassword, Object salt) {
// check for null
if (inputPassword == null) {
return false;
}
String encryptedPassword = encPassword;
// strip off the prefix
if (encryptedPassword.startsWith(SSHA_PREFIX)
|| encryptedPassword.startsWith(SSHA_PREFIX.toLowerCase())) {
encryptedPassword = encryptedPassword.substring(SSHA_PREFIX.length());
}
try {
byte[] decodedBytes = Base64.decodeBase64(encryptedPassword.getBytes("UTF-8"));
// strip the first 20 char, but make sure it is valie
if (decodedBytes.length - 20 <= 0) {
return false;
}
byte[] decryptSalt = new byte[decodedBytes.length - 20];
System.arraycopy(decodedBytes, 20, decryptSalt, 0, decryptSalt.length);
String check = this.encodePassword(inputPassword, decryptSalt);
return check.substring(SSHA_PREFIX.length()).equals(encryptedPassword);
} catch (UnsupportedEncodingException e) {
throw new RuntimeException("This JVM failed to get bytes in UTF-8 from String: " + salt, e);
}
}
public String encodePassword(String password, Object salt) {
try {
byte[] saltBytes = null;
// needs to be null, byteArray, or a String
if (salt == null) {
// 4 bytes
saltBytes = new BigInteger((4 * 8), random).toString(32).getBytes("UTF-8");
} else if (byte[].class.isInstance(salt)) {
saltBytes = (byte[]) salt;
} else {
throw new IllegalArgumentException("salt must be of type: byte[].");
}
// check to make sure we can get the algorithm
MessageDigest md;
try {
md = MessageDigest.getInstance("SHA1");
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("Digest SHA not supported on this JVM.");
}
// digest
md.update(password.getBytes("UTF-8"));
md.update(saltBytes);
byte[] digested = md.digest();
// toBeEncoded = digest + salt
byte[] toBeEncoded = new byte[digested.length + saltBytes.length];
System.arraycopy(digested, 0, toBeEncoded, 0, digested.length);
System.arraycopy(saltBytes, 0, toBeEncoded, digested.length, saltBytes.length);
return "{SSHA}" + new String(Base64.encodeBase64(toBeEncoded));
} catch (UnsupportedEncodingException e) {
throw new RuntimeException("This JVM failed to get bytes in UTF-8 from String: " + salt, e);
}
}
