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Support providing keys as PEM string
This comes with some necessary refactoring or the key reading machinery.
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38 changes: 38 additions & 0 deletions
38
core/src/main/java/io/aiven/kafka/tieredstorage/security/RsaKeyFormat.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| /* | ||
| * Copyright 2023 Aiven Oy | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
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| package io.aiven.kafka.tieredstorage.security; | ||
|
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| public enum RsaKeyFormat { | ||
| PEM("pem"), | ||
| PEM_FILE("pem_file"); | ||
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| public final String name; | ||
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| RsaKeyFormat(final String name) { | ||
| this.name = name; | ||
| } | ||
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| public static RsaKeyFormat parse(final String value) { | ||
| if (value.equals(PEM.name)) { | ||
| return PEM; | ||
| } else if (value.equals(PEM_FILE.name)) { | ||
| return PEM_FILE; | ||
| } else { | ||
| throw new IllegalArgumentException("Unsupported value: " + value); | ||
| } | ||
| } | ||
| } |
84 changes: 84 additions & 0 deletions
84
core/src/main/java/io/aiven/kafka/tieredstorage/security/RsaKeyReader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| /* | ||
| * Copyright 2023 Aiven Oy | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
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| package io.aiven.kafka.tieredstorage.security; | ||
|
|
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| import java.io.ByteArrayInputStream; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.io.InputStreamReader; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.Path; | ||
| import java.security.KeyFactory; | ||
| import java.security.KeyPair; | ||
| import java.security.NoSuchAlgorithmException; | ||
| import java.security.spec.InvalidKeySpecException; | ||
| import java.security.spec.PKCS8EncodedKeySpec; | ||
| import java.security.spec.X509EncodedKeySpec; | ||
| import java.util.Objects; | ||
|
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| import org.bouncycastle.util.io.pem.PemReader; | ||
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| public class RsaKeyReader { | ||
| static KeyPair readKeyPair(final String publicKey, | ||
| final RsaKeyFormat publicKeyFormat, | ||
| final String privateKey, | ||
| final RsaKeyFormat privateKeyFormat) { | ||
| final KeyFactory keyFactory; | ||
| try { | ||
| keyFactory = KeyFactory.getInstance("RSA"); | ||
| } catch (final NoSuchAlgorithmException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| try { | ||
| final byte[] publicKeyPemContent = readPemContent(publicKey, publicKeyFormat); | ||
| final var publicKeySpec = new X509EncodedKeySpec(publicKeyPemContent); | ||
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| final byte[] privateKeyPemContent = readPemContent(privateKey, privateKeyFormat); | ||
| final var privateKeySpec = new PKCS8EncodedKeySpec(privateKeyPemContent); | ||
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| return new KeyPair( | ||
| keyFactory.generatePublic(publicKeySpec), | ||
| keyFactory.generatePrivate(privateKeySpec)); | ||
| } catch (final IOException | InvalidKeySpecException e) { | ||
| throw new RuntimeException("Couldn't read RSA key pair", e); | ||
| } | ||
| } | ||
|
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| private static byte[] readPemContent(final String key, | ||
| final RsaKeyFormat keyFormat) throws IOException { | ||
| final InputStream inputStream; | ||
| if (keyFormat == RsaKeyFormat.PEM) { | ||
| inputStream = new ByteArrayInputStream(key.getBytes()); | ||
| } else if (keyFormat == RsaKeyFormat.PEM_FILE) { | ||
| inputStream = Files.newInputStream(Path.of(key)); | ||
| } else { | ||
| throw new IllegalArgumentException("Unsupported RSA key format: " + keyFormat); | ||
| } | ||
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| try (inputStream; | ||
| final InputStreamReader inputStreamReader = new InputStreamReader(inputStream); | ||
| final var pemReader = new PemReader(inputStreamReader)) { | ||
| final var pemObject = pemReader.readPemObject(); | ||
| if (Objects.isNull(pemObject)) { | ||
| throw new IllegalArgumentException("Couldn't read PEM"); | ||
| } | ||
| return pemObject.getContent(); | ||
| } catch (final IOException e) { | ||
| throw new IllegalArgumentException("Couldn't read PEM", e); | ||
| } | ||
| } | ||
| } |
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