public Boolean verifySignature(byte[] originalData, byte[] signedData) { boolean verified = false; try { Signature sig = Signature.getInstance("SHA1withDSA", "SUN"); sig.initVerify(getPublicKey()); sig.update(originalData, 0, originalData.length); verified = sig.verify(signedData); } catch (SignatureException ex) { ex.printStackTrace(); Logger.getLogger(SignatureVerifier.class.getName()).log(Level.SEVERE, null); } catch (InvalidKeyException ex) { ex.printStackTrace(); Logger.getLogger(SignatureVerifier.class.getName()).log(Level.SEVERE, null); } catch (NoSuchAlgorithmException ex) { ex.printStackTrace(); Logger.getLogger(SignatureVerifier.class.getName()).log(Level.SEVERE, null); } catch (NoSuchProviderException ex) { ex.printStackTrace(); Logger.getLogger(SignatureVerifier.class.getName()).log(Level.SEVERE, null); } return verified; }