         }
         return nil
     }
-    
-    
+
     /// Gets the notBefore date from the validity period of the certificate.
     public var notBefore: Date? {
         return block1[X509BlockPosition.dateValidity]?.sub(0)?.value as? Date
     }
-    
-    
+
     /// Gets the notAfter date from the validity period of the certificate.
     public var notAfter: Date? {
         return block1[X509BlockPosition.dateValidity]?.sub(1)?.value as? Date
     }
-    
-    
+
     /// Gets the signature value (the raw signature bits) from the certificate.
     public var signature: Data? {
         return asn1[0].sub(2)?.value as? Data
     }
-    
-    
+
     /// Gets the signature algorithm name for the certificate signature algorithm.
     public var sigAlgName: String? {
         return ASN1Object.oidDecodeMap[sigAlgOID ?? ""]
     }
-    
-    
+
     /// Gets the signature algorithm OID string from the certificate.
     public var sigAlgOID: String? {
         return block1.sub(2)?.sub(0)?.value as? String
     }
-    
-    
+
     /// Gets the DER-encoded signature algorithm parameters from this certificate's signature algorithm.
     public var sigAlgParams: Data? {
         return nil
     }
-    
-    
+
     /**
      Gets a boolean array representing bits of the KeyUsage extension, (OID = 2.5.29.15).
      ```

        }
        return result
    }
    
    public func issuer(oid: String) -> String? {
        if let subjectBlock = block1[X509BlockPosition.issuer] {
            if let oidBlock = subjectBlock.findOid(oid) {

        }
        return nil
    }

    // Format subject/issuer information in RFC1779
    private func blockDistinguishedName(block: ASN1Object) -> String {
        var result = ""
