org.smallmind.web.jwt.JWKKeyParser Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of web-jwt Show documentation
JWT Token API
The newest version!
/*
 * Copyright (c) 2007 through 2024 David Berkman
 *
 * This file is part of the SmallMind Code Project.
 *
 * The SmallMind Code Project is free software, you can redistribute
 * it and/or modify it under either, at your discretion...
 *
 * 1) The terms of GNU Affero General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 *
 * ...or...
 *
 * 2) The terms of the Apache License, Version 2.0.
 *
 * The SmallMind Code Project is distributed in the hope that it will
 * be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License or Apache License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * and the Apache License along with the SmallMind Code Project. If not, see
 *  or .
 *
 * Additional permission under the GNU Affero GPL version 3 section 7
 * ------------------------------------------------------------------
 * If you modify this Program, or any covered work, by linking or
 * combining it with other code, such other code is not for that reason
 * alone subject to any of the requirements of the GNU Affero GPL
 * version 3.
 */
package org.smallmind.web.jwt;

import java.io.IOException;
import java.math.BigInteger;
import com.fasterxml.jackson.databind.JsonNode;
import org.smallmind.nutsnbolts.http.Base64Codec;
import org.smallmind.nutsnbolts.security.key.KeyFactors;
import org.smallmind.nutsnbolts.security.key.KeyParseException;
import org.smallmind.nutsnbolts.security.key.KeyParser;
import org.smallmind.web.json.scaffold.util.JsonCodec;

public class JWKKeyParser implements KeyParser {

  private final KeyFactors keyFactors;

  public JWKKeyParser (String raw)
    throws IOException, KeyParseException {

    this(JsonCodec.readAsJsonNode(raw));
  }

  public JWKKeyParser (JsonNode rawNode)
    throws IOException, KeyParseException {

    if (!(rawNode.has("n") && rawNode.has("e"))) {
      throw new KeyParseException("JWK is missing attribute 'n' or 'e'");
    } else {

      String n = rawNode.get("n").asText();
      String e = rawNode.get("e").asText();

      keyFactors = new KeyFactors(new BigInteger(1, Base64Codec.urlSafeDecode(n)), new BigInteger(1, Base64Codec.urlSafeDecode(e)));
    }
  }

  @Override
  public KeyFactors extractFactors () {

    return keyFactors;
  }
}