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Signed-off-by: Appu Goundan <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| /* | ||
| * Copyright 2023 The Sigstore 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 util; | ||
|
|
||
| import com.code_intelligence.jazzer.api.FuzzedDataProvider; | ||
| import com.google.common.hash.Hashing; | ||
| import dev.sigstore.trustroot.CertificateAuthorities; | ||
| import dev.sigstore.trustroot.CertificateAuthority; | ||
| import dev.sigstore.trustroot.ImmutableCertificateAuthorities; | ||
| import dev.sigstore.trustroot.ImmutableCertificateAuthority; | ||
| import dev.sigstore.trustroot.ImmutableLogId; | ||
| import dev.sigstore.trustroot.ImmutablePublicKey; | ||
| import dev.sigstore.trustroot.ImmutableSubject; | ||
| import dev.sigstore.trustroot.ImmutableTransparencyLog; | ||
| import dev.sigstore.trustroot.ImmutableTransparencyLogs; | ||
| import dev.sigstore.trustroot.ImmutableValidFor; | ||
| import dev.sigstore.trustroot.TransparencyLog; | ||
| import dev.sigstore.trustroot.TransparencyLogs; | ||
| import java.io.ByteArrayInputStream; | ||
| import java.net.URI; | ||
| import java.security.cert.CertPath; | ||
| import java.security.cert.Certificate; | ||
| import java.security.cert.CertificateException; | ||
| import java.security.cert.CertificateFactory; | ||
| import java.time.Instant; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
|
||
| public final class Tuf { | ||
|
|
||
| // arbitrarily decided max certificate size in bytes | ||
| private static final int MAX_CERT_SIZE = 10240; | ||
|
|
||
| // ecdsa key size in bytes | ||
| private static final int ECDSA_KEY_BYTES = 91; | ||
|
|
||
| public static TransparencyLogs transparencyLogsFrom(FuzzedDataProvider data) { | ||
| return ImmutableTransparencyLogs.builder().addTransparencyLog(genTlog(data)).build(); | ||
| } | ||
|
|
||
| public static CertificateAuthorities certificateAuthoritiesFrom(FuzzedDataProvider data) | ||
| throws CertificateException { | ||
| return ImmutableCertificateAuthorities.builder().addCertificateAuthority(genCA(data)).build(); | ||
| } | ||
|
|
||
| private static CertPath genCertPath(FuzzedDataProvider data) throws CertificateException { | ||
| List<Certificate> certList = new ArrayList<Certificate>(); | ||
| CertificateFactory cf = CertificateFactory.getInstance("X.509"); | ||
| certList.add( | ||
| cf.generateCertificate(new ByteArrayInputStream(data.consumeBytes(MAX_CERT_SIZE)))); | ||
| certList.add( | ||
| cf.generateCertificate(new ByteArrayInputStream(data.consumeBytes(MAX_CERT_SIZE)))); | ||
| return cf.generateCertPath(certList); | ||
| } | ||
|
|
||
| private static CertificateAuthority genCA(FuzzedDataProvider data) throws CertificateException { | ||
| return ImmutableCertificateAuthority.builder() | ||
| .validFor(ImmutableValidFor.builder().start(Instant.EPOCH).build()) | ||
| .subject(ImmutableSubject.builder().commonName("test").organization("test").build()) | ||
| .certPath(genCertPath(data)) | ||
| .uri(URI.create("test")) | ||
| .build(); | ||
| } | ||
|
|
||
| private static TransparencyLog genTlog(FuzzedDataProvider data) { | ||
| var pk = | ||
| ImmutablePublicKey.builder() | ||
| .keyDetails("PKIX_ECDSA_P256_SHA_256") | ||
| .rawBytes(data.consumeBytes(ECDSA_KEY_BYTES)) | ||
| .validFor(ImmutableValidFor.builder().start(Instant.EPOCH).build()) | ||
| .build(); | ||
| var logId = Hashing.sha256().hashBytes(pk.getRawBytes()).asBytes(); | ||
| return ImmutableTransparencyLog.builder() | ||
| .baseUrl(URI.create("test")) | ||
| .hashAlgorithm("SHA2_256") | ||
| .publicKey(pk) | ||
| .logId(ImmutableLogId.builder().keyId(logId).build()) | ||
| .build(); | ||
| } | ||
| } |
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