import java.security.MessageDigest; import javax.crypto.Mac; import javax.crypto.spec.SecretKeySpec; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.dms.common.constant.CommonConstants; /** * 签名加密工具类<br/> * Date: 2018年<br/> * * @version * @see */ public class SignUtils { private static final Logger LOG = LoggerFactory.getLogger(SignUtils.class); //private static final String DEFAULT_CHARSET = "UTF-8"; private static final char[] DIGITS; public static String hmacSha256(String key, String data) { try { Mac mac = Mac.getInstance("HmacSHA256"); SecretKeySpec signingKey = new SecretKeySpec(key.getBytes(), mac.getAlgorithm()); mac.init(signingKey); return encodeHex(mac.doFinal(data.getBytes())); } catch (Exception e) { LOG.error("execute hmacSHA256 error",e); } return null; } public static String md5(String data, String charset) { try { byte[] msg = data.getBytes(charset); MessageDigest md = MessageDigest.getInstance("MD5"); return encodeHex(md.digest(msg)); } catch (Exception e) { LOG.error("execute MD5 error",e); } return null; } public static String sha256(String data, String charset) { try { byte[] msg = data.getBytes(charset); MessageDigest md = MessageDigest.getInstance("SHA-256"); return encodeHex(md.digest(msg)); } catch (Exception e) { LOG.error("execute SHA-256 error",e); } return null; } public static String sha1(String data, String charset) { try { byte[] msg = data.getBytes(charset); MessageDigest md = MessageDigest.getInstance("SHA1"); return encodeHex(md.digest(msg)); } catch (Exception e) { LOG.error("execute SHA1 error",e); } return null; } public static String sha1(String data) { return sha1(data, CommonConstants.DEFAULT_CHARSET); } private static String encodeHex(byte[] data) { int l = data.length; char[] out = new char[l << 1]; int i = 0; for (int j = 0; i < l; ++i) { out[j++] = DIGITS[(240 & data[i]) >>> 4]; out[j++] = DIGITS[15 & data[i]]; } return new String(out); } static { DIGITS = new char[] {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}; } }