Examples of javax.crypto.Mac

javax.crypto.Mac
This class provides the public API for Message Authentication Code (MAC) algorithms.

   * @param key HMAC-SHA1密钥
   */
  public static byte[] hmacSha1(byte[] input, byte[] key) {
    try {
      SecretKey secretKey = new SecretKeySpec(key, HMACSHA1);
      Mac mac = Mac.getInstance(HMACSHA1);
      mac.init(secretKey);
      return mac.doFinal(input);
    } catch (GeneralSecurityException e) {
      throw ExceptionUtils.unchecked(e);
    }
  }

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        return base64Encoded;
    }


    private String sign(String toSign) throws UnsupportedEncodingException, NoSuchAlgorithmException, InvalidKeyException
    {
        Mac hmac = Mac.getInstance("HmacSHA1");
        hmac.init(new SecretKeySpec(AWS_SECRET_KEY.getBytes("UTF-8"), "HmacSHA1"));
        String signature = (new BASE64Encoder()).encode(hmac.doFinal(toSign.getBytes("UTF-8"))).replaceAll("\n", "");


        return signature;
    }

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            bytes[i] = (byte) (id);
            id >>>= 8;
        }


        try {
            Mac mac = Mac.getInstance(algorithm);
            mac.init(key);
            mac.update(bytes);


            return mac.doFinal();
        } catch (NoSuchAlgorithmException e) {
        } catch (InvalidKeyException e) {
        }
        assert false : "Should never have reached here";
        return null;

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        /**
         * Make sure that we can generate the  Mac.
         */
        try {
            Mac mac = Mac.getInstance(algorithm);
            mac.init(key);
        } catch (NoSuchAlgorithmException e) {
            assert false : "Should never have reached here";
        } catch (InvalidKeyException e) {
            assert false : "Should never have reached here";
        }

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            bytes[i] = (byte) (n);
            n >>>= 8;
        }


        try {
            Mac mac = Mac.getInstance(algorithm);
            mac.init(key);
            mac.update(bytes);


            return mac.doFinal();
        } catch (NoSuchAlgorithmException e) {
        } catch (InvalidKeyException e) {
        }
        assert false : "Should never have reached here";
        return null;

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   byte[] hmacSHA1(String data) {
      try {
         String key = keySupplier.get();
         checkState(key != null, "%s returned a null temporaryUrlKey!", keySupplier);
         Mac mac = Mac.getInstance("HmacSHA1");
         mac.init(new SecretKeySpec(key.getBytes(UTF_8), "HmacSHA1"));
         return mac.doFinal(data.getBytes(UTF_8));
      } catch (Exception e) {
         throw propagate(e);
      }
   }

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            // Acquire an HMAC/SHA1 from the raw key bytes.
            SecretKeySpec signingKey=
                    new SecretKeySpec(awsSecretAccessKey.getBytes(), HMAC_SHA1_ALGORITHM);


            // Acquire the MAC instance and initialize with the signing key.
            Mac mac=null;
            try {
                mac=Mac.getInstance(HMAC_SHA1_ALGORITHM);
            }
            catch(NoSuchAlgorithmException e) {
                // should not happen
                throw new RuntimeException("Could not find sha1 algorithm", e);
            }
            try {
                mac.init(signingKey);
            }
            catch(InvalidKeyException e) {
                // also should not happen
                throw new RuntimeException("Could not initialize the MAC algorithm", e);
            }


            // Compute the HMAC on the digest, and set it.
            String b64=Base64.encodeBytes(mac.doFinal(canonicalString.getBytes()));


            if(urlencode) {
                return urlencode(b64);
            }
            else {

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        this.currentInterval = currentInterval;
    }


    public byte[] digest() throws NoSuchAlgorithmException, InvalidKeyException {
        byte[] challenge = ByteBuffer.allocate(8).putLong(currentInterval).array();
        Mac mac = Mac.getInstance(hash.toString());
        SecretKeySpec macKey = new SecretKeySpec(secret, ALGORITHM);
        mac.init(macKey);
        return mac.doFinal(challenge);
    }

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   * @param keyBytes HMAC-SHA1密钥
   */
  public static byte[] hmacSha1(String input, byte[] keyBytes) {
    try {
      SecretKey secretKey = new SecretKeySpec(keyBytes, HMACSHA1);
      Mac mac = Mac.getInstance(HMACSHA1);
      mac.init(secretKey);
      return mac.doFinal(input.getBytes());
    } catch (GeneralSecurityException e) {
      throw new IllegalStateException("Security exception", e);
    }
  }

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            // Acquire an HMAC/SHA1 from the raw key bytes.
            SecretKeySpec signingKey=
                    new SecretKeySpec(awsSecretAccessKey.getBytes(), HMAC_SHA1_ALGORITHM);


            // Acquire the MAC instance and initialize with the signing key.
            Mac mac=null;
            try {
                mac=Mac.getInstance(HMAC_SHA1_ALGORITHM);
            }
            catch(NoSuchAlgorithmException e) {
                // should not happen
                throw new RuntimeException("Could not find sha1 algorithm", e);
            }
            try {
                mac.init(signingKey);
            }
            catch(InvalidKeyException e) {
                // also should not happen
                throw new RuntimeException("Could not initialize the MAC algorithm", e);
            }


            // Compute the HMAC on the digest, and set it.
            String b64=Base64.encodeBytes(mac.doFinal(canonicalString.getBytes()));


            if(urlencode) {
                return urlencode(b64);
            }
            else {

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