app: restructure and start building p15 output

pkg/tools/asn1obj/oid.go

@@ -0,0 +1,19 @@
+package asn1obj
+
+import "encoding/asn1"
+
+var (
+	OIDPkscs15Content     = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 15, 3, 1} // pkcs15content (PKCS #15 content type)
+	OIDrsaEncryptionPKCS1 = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 1}     // rsaEncryption (PKCS #1)
+)
+
+// ObjectIdentifier returns an ASN.1 OBJECT IDENTIFIER with the oidValue bytes
+func ObjectIdentifier(oid asn1.ObjectIdentifier) []byte {
+	// should never error
+	asn1result, err := asn1.Marshal(oid)
+	if err != nil {
+		panic(err)
+	}
+
+	return asn1result
+}