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feat(auth): implement auto-detection for k8s serviceaccount token (#383)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| /* | ||
| * Copyright The Cryostat Authors. | ||
| * | ||
| * 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.cryostat.agent; | ||
|
|
||
| import java.io.File; | ||
| import java.io.IOException; | ||
| import java.nio.charset.StandardCharsets; | ||
| import java.nio.file.Files; | ||
| import java.util.Base64; | ||
| import java.util.function.Function; | ||
|
|
||
| import io.cryostat.agent.util.StringUtils; | ||
|
|
||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| public enum AuthorizationType implements Function<String, String> { | ||
| NONE(v -> null), | ||
| BEARER(v -> String.format("Bearer %s", v)), | ||
| BASIC( | ||
| v -> | ||
| String.format( | ||
| "Basic %s", | ||
| Base64.getEncoder() | ||
| .encodeToString(v.getBytes(StandardCharsets.UTF_8)))), | ||
| KUBERNETES( | ||
| v -> { | ||
| try { | ||
| File file = new File(v); | ||
| String token = Files.readString(file.toPath()).strip(); | ||
| return String.format("Bearer %s", token); | ||
| } catch (IOException ioe) { | ||
| Logger log = LoggerFactory.getLogger(AuthorizationType.class); | ||
| log.warn(String.format("Failed to read serviceaccount token from %s", v), ioe); | ||
| return null; | ||
| } | ||
| }), | ||
| AUTO( | ||
| v -> { | ||
| String k8s = KUBERNETES.fn.apply(v); | ||
| if (StringUtils.isNotBlank(k8s)) { | ||
| return k8s; | ||
| } | ||
| return NONE.fn.apply(v); | ||
| }), | ||
| ; | ||
|
|
||
| private final Function<String, String> fn; | ||
|
|
||
| private AuthorizationType(Function<String, String> fn) { | ||
| this.fn = fn; | ||
| } | ||
|
|
||
| @Override | ||
| public String apply(String in) { | ||
| return fn.apply(in); | ||
| } | ||
|
|
||
| public static AuthorizationType fromString(String s) { | ||
| for (AuthorizationType t : AuthorizationType.values()) { | ||
| if (t.name().toLowerCase().equals(s.toLowerCase())) { | ||
| return t; | ||
| } | ||
| } | ||
| return NONE; | ||
| } | ||
| } |
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