io.jsonwebtoken.impl.crypto.DefaultJwtSignatureValidator Maven / Gradle / Ivy
/*
* Copyright (C) 2014 jsonwebtoken.io
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.jsonwebtoken.impl.crypto;
import io.jsonwebtoken.SignatureAlgorithm;
import io.jsonwebtoken.impl.TextCodec;
import io.jsonwebtoken.lang.Assert;
import java.nio.charset.Charset;
import java.security.Key;
public class DefaultJwtSignatureValidator implements JwtSignatureValidator {
private static final Charset US_ASCII = Charset.forName("US-ASCII");
private final SignatureValidator signatureValidator;
public DefaultJwtSignatureValidator(SignatureAlgorithm alg, Key key) {
this(DefaultSignatureValidatorFactory.INSTANCE, alg, key);
}
public DefaultJwtSignatureValidator(SignatureValidatorFactory factory, SignatureAlgorithm alg, Key key) {
Assert.notNull(factory, "SignerFactory argument cannot be null.");
this.signatureValidator = factory.createSignatureValidator(alg, key);
}
@Override
public boolean isValid(String jwtWithoutSignature, String base64UrlEncodedSignature) {
byte[] data = jwtWithoutSignature.getBytes(US_ASCII);
byte[] signature = TextCodec.BASE64URL.decode(base64UrlEncodedSignature);
return this.signatureValidator.isValid(data, signature);
}
}