decode problem with ASN INTEGER when value is colon seperated hex

[jacksonm]

When encountering a serialNumber (type of CertificateSerialNumber) with type of INTEGER and a value that has a hex encoding format, for example, like 00:00:00:00:00:00:00:00:00:00:00:00, (yes, I know, some CAs seem to have delusions of grandeur with their serial numbering policies) the returned data structure is similar to:

'serialNumber' => bless( {
'value' => [
237291436,
579135199,
318680686,
480253832,
1492158
],
'sign' => '+'
}, 'Math::BigInt' )

I tried changing the CertificateSerialNumber type to OCTET STRING, but I only got asn decode error. How to proceed with this situation?