https://github.com/marcellodesales/jsonutils-java

https://github.com/marcellodesales/jsonutils-java

Last synced: 26 days ago
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• Host: GitHub
• URL: https://github.com/marcellodesales/jsonutils-java
• Owner: marcellodesales
• Created: 2016-09-17T19:38:57.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2016-09-17T23:31:21.000Z (over 8 years ago)
• Last Synced: 2023-06-30T20:37:09.780Z (over 1 year ago)
• Language: Java
• Size: 8.79 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
Json Utils

==========

* JSONMinify: properly Minifies JSON to be used on Github HMAC verification, specially for validation of HMAC signatures of Github Enterprise Webhook hooks.

JSONMinify.minify(payload)

-----

This is needed for verifying Github Enterprise HMAC Webhook signatures. Since the payload is a JSON payload, it needs to be the minified version of the JSON to properly generate a valid HMAC SHA1 value of the payload. Results are the same as using http://beautifytools.com/json-minifier.php.

```java

  /**

   * Computes a RFC 2104-compliant HMAC digest using SHA1 of a payloadFrom with a given key

   * (secret).

   *

   * @param payload is the payload provided by the user.

   * @param secret is the secret used by the user.

   * @return HMAC digest of payloadFrom using secret as key. Will return COMPUTED_INVALID_SIGNATURE

   *         on any exception during computation.

   * @throws InvalidKeyException when the key is invalid.

   */

  public static String sha1(String payload, String secret) throws InvalidKeyException {

    payload = payload.startsWith("[") || payload.startsWith("{") ? JSONMinify.minify(payload) : payload;

    final SecretKeySpec keySpec = new SecretKeySpec(secret.getBytes(UTF_8), HMAC_SHA1_ALGORITHM);

    try {

      Mac mac = Mac.getInstance(HMAC_SHA1_ALGORITHM);

      mac.init(keySpec);

      final byte[] rawHMACBytes = mac.doFinal(payload.getBytes(UTF_8));

      return Hex.encodeHexString(rawHMACBytes);

    } catch (NoSuchAlgorithmException e) {

      return null;  // not happening.

    }

  }

```

Gradle Dependency Coodinate

-------

```groovy

  compile 'com.github.marcellodesales:json-utils:1.0.0'

```

Maven Dependency Coordinate

-----

* Maven

```xml

  com.github.marcellodesales

  json-utils

  1.0.0

```

Dev

=====

* Initial Setup in Maven Central: https://issues.sonatype.org/browse/OSSRH-25026