code: public byte[] decrypt(InputStream data, KeyType keyType) throws IORuntimeException {
  		return decrypt(IoUtil.readBytes(data), keyType);
  	}
docs: 解密
  
  @param data 被解密的bytes
  @param keyType 私钥或公钥 {@link KeyType}
  @return 解密后的bytes
  @throws IORuntimeException IO异常