diff --git a/payload-processor/src/main/kotlin/no/nav/emottak/util/SertifikatUtil.kt b/payload-processor/src/main/kotlin/no/nav/emottak/util/SertifikatUtil.kt
new file mode 100644
index 00000000..955b927e
--- /dev/null
+++ b/payload-processor/src/main/kotlin/no/nav/emottak/util/SertifikatUtil.kt
@@ -0,0 +1,20 @@
+package no.nav.emottak.util
+
+import io.ktor.server.plugins.BadRequestException
+import java.io.ByteArrayInputStream
+import java.security.cert.CertificateException
+import java.security.cert.CertificateFactory
+import java.security.cert.X509Certificate
+
+internal fun isSelfSigned(certificate: X509Certificate) =
+    certificate.subjectX500Principal == certificate.issuerX500Principal
+
+internal fun createX509Certificate(byteArray: ByteArray): X509Certificate {
+    val cf = CertificateFactory.getInstance("X.509")
+    return try {
+        cf.generateCertificate(ByteArrayInputStream(byteArray)) as X509Certificate
+    }
+    catch (e: CertificateException) {
+        throw BadRequestException("")
+    }
+}
\ No newline at end of file