public boolean verifySigature(String sign, String src) { try { Security.addProvider(new ABAProvider()); Signature sigEng = Signature.getInstance("MD5withRSA", "ABA"); byte[] pubbyte = hexStrToBytes(pubKey.trim()); sigEng.initVerify(new RSAPubKey(pubbyte)); sigEng.update(src.getBytes()); byte[] sign1 = hexStrToBytes(sign); if (sigEng.verify(sign1)) { return true; } else { return false; } } catch (Exception e) { return false; } }