消息加密工具-----SHA-1

SHA1

public class SHA1 {
	
	private static final Logger logger = LogManager.getLogger(SHA1.class);
	
	/**
	 * 用SHA1算法生成安全簽名
	 * @param token 票據
	 * @param timestamp 時間戳
	 * @param nonce 隨機字符串
	 * @param encrypt 密文,對明文消息msg加密處理後的得到的
	 * @return 安全簽名
	 * @throws AesException
	 */
	public static String getSHA1(String token, String timestamp, String nonce, String encrypt) throws AesException {
		try {
			String[] array = new String[] { token, timestamp, nonce, encrypt };
			StringBuffer sb = new StringBuffer();
			// 字符串排序
			Arrays.sort(array);
			for (int i = 0; i < 4; i++) {
				sb.append(array[i]);
			}
			String str = sb.toString();
			// SHA1簽名生成
			MessageDigest md = MessageDigest.getInstance("SHA-1");
			md.update(str.getBytes());
			byte[] digest = md.digest();

			StringBuffer hexstr = new StringBuffer();
			String shaHex ;
			for (int i = 0; i < digest.length; i++) {
				shaHex = Integer.toHexString(digest[i] & 0xFF);
				if (shaHex.length() < 2) {
					hexstr.append(0);
				}
				hexstr.append(shaHex);
			}
			return hexstr.toString();
		} catch (Exception e) {
			e.printStackTrace();
			throw new AesException(AesException.ComputeSignatureError);
		}
	}

	public static String getSHA1(String str) throws AesException {
		try {
			MessageDigest digest = java.security.MessageDigest.getInstance("SHA-1");
			digest.update(str.getBytes());
			byte messageDigest[] = digest.digest();
			// Create Hex String
			StringBuffer hexString = new StringBuffer();
			// 字節數組轉換爲 十六進制 數
			for (int i = 0; i < messageDigest.length; i++) {
				String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
				if (shaHex.length() < 2) {
					hexString.append(0);
				}
				hexString.append(shaHex);
			}
			return hexString.toString();

		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
			throw new AesException(AesException.ComputeSignatureError);
		}
	}
}

AesException

@SuppressWarnings("serial")
public class AesException extends RuntimeException {

	public final static int OK = 0;
	public final static int ValidateSignatureError = -40001;
	public final static int ParseXmlError = -40002;
	public final static int ComputeSignatureError = -40003;
	public final static int IllegalAesKey = -40004;
	public final static int ValidateAppidError = -40005;
	public final static int EncryptAESError = -40006;
	public final static int DecryptAESError = -40007;
	public final static int IllegalBuffer = -40008;
	//public final static int EncodeBase64Error = -40009;
	//public final static int DecodeBase64Error = -40010;
	//public final static int GenReturnXmlError = -40011;

	private int code;

	private static String getMessage(int code) {
		switch (code) {
		case ValidateSignatureError:
			return "簽名驗證錯誤";
		case ParseXmlError:
			return "xml解析失敗";
		case ComputeSignatureError:
			return "sha加密生成簽名失敗";
		case IllegalAesKey:
			return "SymmetricKey非法";
		case ValidateAppidError:
			return "appid校驗失敗";
		case EncryptAESError:
			return "aes加密失敗";
		case DecryptAESError:
			return "aes解密失敗";
		case IllegalBuffer:
			return "解密後得到的buffer非法";
//		case EncodeBase64Error:
//			return "base64加密錯誤";
//		case DecodeBase64Error:
//			return "base64解密錯誤";
//		case GenReturnXmlError:
//			return "xml生成失敗";
		default:
			return null; // cannot be
		}
	}

	public int getCode() {
		return code;
	}

	public AesException(int code) {
		super(getMessage(code));
		this.code = code;
	}

}