How to use

computeCanonicalRequestHash

method

in

com.atlassian.jwt.core.HttpRequestCanonicalizer

  /**
   * Convenience method for building and appending JWT claims related to a {@link com.atlassian.jwt.CanonicalHttpRequest}.
   * Encapsulates the knowledge of what claims we make regarding the request.
   * @param jsonBuilder {@link com.atlassian.jwt.writer.JwtJsonBuilder} that constructs the JWT payload
   * @param request {@link com.atlassian.jwt.CanonicalHttpRequest} representing the incoming or outgoing HTTP request
   * @throws UnsupportedEncodingException if {@link java.net.URLEncoder} cannot encode the request's characters
   * @throws NoSuchAlgorithmException if the hashing algorithm does not exist at runtime
   */
  public static void appendHttpRequestClaims(JwtJsonBuilder jsonBuilder, CanonicalHttpRequest request) throws UnsupportedEncodingException, NoSuchAlgorithmException
  {
    jsonBuilder.queryHash(HttpRequestCanonicalizer.computeCanonicalRequestHash(request));
  }
}

  /**
   * Encapsulate the building of requirements that we place upon JWTs in incoming requests.
   * @param request incoming request
   * @return {@link Map} of claim name to verifier for claims upon which we place requirements
   * @throws UnsupportedEncodingException if {@link java.net.URLEncoder} cannot encode the request's characters
   * @throws NoSuchAlgorithmException if the hashing algorithm does not exist at runtime
   */
  public static Map<String, ? extends JwtClaimVerifier> build(CanonicalHttpRequest request) throws UnsupportedEncodingException, NoSuchAlgorithmException
  {
    return Collections.singletonMap(JwtConstants.Claims.QUERY_HASH,
        new JwtClaimEqualityVerifier(JwtConstants.Claims.QUERY_HASH, HttpRequestCanonicalizer.computeCanonicalRequestHash(request)));
  }
}

  public static String generateJwtSignature(HttpMethod httpMethod, URI uri, String addonKey, String secret, String contextPath, String subject) throws UnsupportedEncodingException, NoSuchAlgorithmException {
    JwtWriterFactory jwtWriterFactory = new NimbusJwtWriterFactory();
    JwtWriter jwtWriter = jwtWriterFactory.macSigningWriter(SigningAlgorithm.HS256, secret);

    // Parse param values and build a map
    final List<NameValuePair> rawParams = URLEncodedUtils.parse(uri, "UTF-8");
    final ImmutableMultimap.Builder<String, String> builder = ImmutableMultimap.builder();
    for (NameValuePair rawParam : rawParams) {
      builder.put(rawParam.getName(), rawParam.getValue());
    }

    final ImmutableMap.Builder<String, String[]> paramsMap = ImmutableMap.builder();
    for (Map.Entry<String, Collection<String>> stringCollectionEntry : builder.build().asMap().entrySet()) {
      final Collection<String> collection = stringCollectionEntry.getValue();
      paramsMap.put(stringCollectionEntry.getKey(), collection.toArray(new String[collection.size()]));
    }

    final JwtJsonBuilder jsonBuilder = new JsonSmartJwtJsonBuilder()
        .issuer(addonKey)
        .queryHash(HttpRequestCanonicalizer.computeCanonicalRequestHash(new CanonicalHttpUriRequest(httpMethod.name(), uri.getPath(), URI.create(contextPath).getPath(), paramsMap.build())));

    if (null != subject) {
      jsonBuilder.subject(subject);
    }

    return jwtWriter.jsonToJwt(jsonBuilder.build());
  }
}

  public static String generateJwtSignature(HttpMethod httpMethod, URI uri, String addonKey, String secret, String contextPath, String subject) throws UnsupportedEncodingException, NoSuchAlgorithmException {
    JwtWriterFactory jwtWriterFactory = new NimbusJwtWriterFactory();
    JwtWriter jwtWriter = jwtWriterFactory.macSigningWriter(SigningAlgorithm.HS256, secret);

    // Parse param values and build a map
    final List<NameValuePair> rawParams = URLEncodedUtils.parse(uri, "UTF-8");
    final ImmutableMultimap.Builder<String, String> builder = ImmutableMultimap.builder();
    for (NameValuePair rawParam : rawParams) {
      builder.put(rawParam.getName(), rawParam.getValue());
    }

    final ImmutableMap.Builder<String, String[]> paramsMap = ImmutableMap.builder();
    for (Map.Entry<String, Collection<String>> stringCollectionEntry : builder.build().asMap().entrySet()) {
      final Collection<String> collection = stringCollectionEntry.getValue();
      paramsMap.put(stringCollectionEntry.getKey(), collection.toArray(new String[collection.size()]));
    }

    final JwtJsonBuilder jsonBuilder = new JsonSmartJwtJsonBuilder()
        .issuer(addonKey)
        .queryHash(HttpRequestCanonicalizer.computeCanonicalRequestHash(new CanonicalHttpUriRequest(httpMethod.name(), uri.getPath(), URI.create(contextPath).getPath(), paramsMap.build())));

    if (null != subject) {
      jsonBuilder.subject(subject);
    }

    return jwtWriter.jsonToJwt(jsonBuilder.build());
  }
}