Re: OID encoding help

Peter,

Thanks!

On 5/7/23 09:23, Peter Gutmann wrote:
> Robert Moskowitz <[email protected]> writes:
>
>> For initial work we will use oid = "1.3.6.1.4.1.6715.2.6.6", with the
>> Endorsement as type BIT-STRING.
> The 1 3 6 1 4 1 (note, no dots, that's a common IETF error) the encoding is
> { 0x2B x06 x01 x04 x01 }, then for the 6715 it's broken up into 7-bit values,
> so { 0x34 0x3B } with the high bit set for a continuation character on the
> first one, so 0xB4, then the remaining values as individual bytes.  Finally
> prepend an 0x06 and the length in bytes.
>
> So the final value is { 06 0A 2B 06 01 04 01 B4 3B 02 06 02 }.

Per my number above, shouldn't the last 3 bytes be 02 06 06  ?

Then given a 126-byte Endorsement of:

64508ac066306cc02001003ffe3ff8058eb731967e48293470a73efd272fb7de1fffd73a33c2ae5e12f1a0bb8da5baef394da2d9d5e8ed832001003ffe00000589bbba7c404b16bb7834240bb19829151f5a673f46c600cea5a89ee4833e82a30ccb7db9a55161759a6ac29bc5fd9393a2cc4e378d2f483fcea687ad52012b410e89ca2c86f0630e

Do I just concatinate these?  Or does the Endorsement need a length byte 
of 7E in front of it?

Bob


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