From 19e135d381c55b2674eb911b6350114e424d8f41 Mon Sep 17 00:00:00 2001
From: Bjørn Christian Seime <bjorncs@oath.com>
Date: Fri, 27 Oct 2017 14:56:40 +0200
Subject: Add method to parse PEM encoded x509 certificates

---
 .../yahoo/container/jdisc/athenz/impl/CryptoUtils.java    | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'container-disc/src')

diff --git a/container-disc/src/main/java/com/yahoo/container/jdisc/athenz/impl/CryptoUtils.java b/container-disc/src/main/java/com/yahoo/container/jdisc/athenz/impl/CryptoUtils.java
index 395681f1f35..8b24cf94d8a 100644
--- a/container-disc/src/main/java/com/yahoo/container/jdisc/athenz/impl/CryptoUtils.java
+++ b/container-disc/src/main/java/com/yahoo/container/jdisc/athenz/impl/CryptoUtils.java
@@ -6,6 +6,7 @@ import org.bouncycastle.asn1.x509.Extension;
 import org.bouncycastle.asn1.x509.ExtensionsGenerator;
 import org.bouncycastle.asn1.x509.GeneralName;
 import org.bouncycastle.asn1.x509.GeneralNames;
+import org.bouncycastle.openssl.PEMParser;
 import org.bouncycastle.openssl.jcajce.JcaPEMWriter;
 import org.bouncycastle.operator.OperatorCreationException;
 import org.bouncycastle.operator.jcajce.JcaContentSignerBuilder;
@@ -16,11 +17,13 @@ import org.bouncycastle.util.io.pem.PemObject;
 
 import javax.security.auth.x500.X500Principal;
 import java.io.IOException;
+import java.io.StringReader;
 import java.io.StringWriter;
 import java.io.UncheckedIOException;
 import java.security.KeyPair;
 import java.security.KeyPairGenerator;
 import java.security.NoSuchAlgorithmException;
+import java.security.cert.X509Certificate;
 
 /**
  * @author bjorncs
@@ -79,4 +82,16 @@ class CryptoUtils {
             throw new UncheckedIOException(e);
         }
     }
+
+    static X509Certificate parseCertificate(String pemEncodedCertificate) {
+        try (PEMParser parser = new PEMParser(new StringReader(pemEncodedCertificate))) {
+            Object pemObject = parser.readObject();
+            if (!(pemObject instanceof X509Certificate)) {
+                throw new IllegalArgumentException("Expeceted X509Certificate instance, got " + pemObject);
+            }
+            return (X509Certificate) pemObject;
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
 }
-- 
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