1 files changed, 56 insertions, 0 deletions
diff --git a/certService/src/main/java/org/onap/oom/certservice/certification/conversion/X509CertificateBuilder.java b/certService/src/main/java/org/onap/oom/certservice/certification/conversion/X509CertificateBuilder.java
new file mode 100644
index 00000000..88e77766
--- /dev/null
+++ b/certService/src/main/java/org/onap/oom/certservice/certification/conversion/X509CertificateBuilder.java
@@ -0,0 +1,56 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Cert Service
+ * ================================================================================
+ * Copyright (C) 2020 Nokia. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.oom.certservice.certification.conversion;
+
+import java.io.IOException;
+import java.math.BigInteger;
+import java.security.SecureRandom;
+import java.time.LocalDateTime;
+import java.time.ZoneOffset;
+import java.util.Date;
+import org.bouncycastle.asn1.ASN1Sequence;
+import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
+import org.bouncycastle.cert.X509v3CertificateBuilder;
+import org.bouncycastle.pkcs.PKCS10CertificationRequest;
+import org.springframework.stereotype.Component;
+
+@Component
+public class X509CertificateBuilder {
+
+    private static final int SECURE_NEXT_BYTES = 16;
+    private static final int VALID_PERIOD_IN_DAYS = 365;
+
+    public X509v3CertificateBuilder build(PKCS10CertificationRequest csr) throws IOException {
+        return new X509v3CertificateBuilder(csr.getSubject(), createSerial(),
+                Date.from(LocalDateTime.now().toInstant(ZoneOffset.UTC)),
+                Date.from(LocalDateTime.now().plusDays(VALID_PERIOD_IN_DAYS).toInstant(ZoneOffset.UTC)),
+                new PKCS10CertificationRequest(csr.getEncoded()).getSubject(),
+                SubjectPublicKeyInfo.getInstance(ASN1Sequence.getInstance(csr.getSubjectPublicKeyInfo().getEncoded())));
+
+    }
+
+    private BigInteger createSerial() {
+        byte[] serial = new byte[SECURE_NEXT_BYTES];
+        new SecureRandom().nextBytes(serial);
+        return new BigInteger(serial).abs();
+    }
+
+}