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Merge pull request #297 from michael-doubez/jws-signing-verification
Add JWKS parameters for verifying web token signatures
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| # Text by default | ||
| * text=auto | ||
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| # Images | ||
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| /* | ||
| * The MIT License | ||
| * | ||
| * Copyright (c) 2024 JenkinsCI oic-auth-plugin developers | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in | ||
| * all copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| * THE SOFTWARE. | ||
| */ | ||
| package org.jenkinsci.plugins.oic; | ||
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| import com.google.api.client.auth.openidconnect.IdToken; | ||
| import com.google.api.client.auth.openidconnect.IdTokenVerifier; | ||
| import com.google.api.client.json.webtoken.JsonWebSignature; | ||
| import hudson.Util; | ||
| import java.io.IOException; | ||
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| /** | ||
| * Extend IdTokenVerifier to verify UserInfo webtoken | ||
| */ | ||
| public class OicJsonWebTokenVerifier extends IdTokenVerifier { | ||
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| /** Bypass Signature verification if no JWKS url configured */ | ||
| private final boolean hasNoJwksServerUrl; | ||
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| /** Payload indicating userInfo */ | ||
| private static final IdToken.Payload NO_PAYLOAD = new IdToken.Payload(); | ||
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| /** | ||
| * Default verifier | ||
| */ | ||
| public OicJsonWebTokenVerifier() { | ||
| super(); | ||
| hasNoJwksServerUrl = true; | ||
| } | ||
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| /** | ||
| * Verifier with custom builder | ||
| */ | ||
| public OicJsonWebTokenVerifier(String jwksServerUrl, IdTokenVerifier.Builder builder) { | ||
| super(builder.setCertificatesLocation(jwksServerUrl)); | ||
| hasNoJwksServerUrl = (Util.fixEmptyAndTrim(jwksServerUrl) == null); | ||
| } | ||
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| /** Verify real idtoken */ | ||
| public boolean verifyIdToken(IdToken idToken) throws IOException { | ||
| if (hasNoJwksServerUrl) { | ||
| /* avoid Google's certificate fallback mechanism */ | ||
| return super.verifyPayload(idToken); | ||
| } | ||
| return verifyOrThrow(idToken); | ||
| } | ||
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| /** Verify userinfo jwt token */ | ||
| public boolean verifyUserInfo(JsonWebSignature userinfo) throws IOException { | ||
| if (hasNoJwksServerUrl) { | ||
| /* avoid Google's certificate fallback mechanism */ | ||
| return true; | ||
| } | ||
| IdToken idToken = new IdToken( | ||
| userinfo.getHeader(), | ||
| NO_PAYLOAD, /* bypass verification of payload */ | ||
| userinfo.getSignatureBytes(), | ||
| userinfo.getSignedContentBytes()); | ||
| return verifyOrThrow(idToken); | ||
| } | ||
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| /** hack: verify payload only if idtoken is not userinfo */ | ||
| @Override | ||
| protected boolean verifyPayload(IdToken idToken) { | ||
| if (idToken.getPayload() == NO_PAYLOAD) { | ||
| return true; | ||
| } | ||
| return super.verifyPayload(idToken); | ||
| } | ||
| } | ||
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