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RalphTro / epcis-event-hash-generator

ALGORITHM and SOFTWARE PROTOTYPE to uniquely identify/validate the integrity of any EPCIS event through a common, syntax-agnostic approach based on hashing. Takes an EPCIS Document (formatted in either XML or JSON-LD) and returns the corresponding hash value(s).
MIT License
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Reference Event Hash Example 1: check pre-hash string/hash value + adjust illustration #88

Closed RalphTro closed 1 year ago

RalphTro commented 1 year ago

Once #87 is addressed, double-check whether algorithm outputs the following pre-hash string for ReferenceEventHashAlgorithm:

eventType=ObjectEventeventTime=2020-03-04T10:00:30.000ZeventTimeZoneOffset=+01:00epcListepc=https://id.gs1.org/00/040123450000001112epc=https://id.gs1.org/00/040123450000002225epc=https://id.gs1.org/00/040123450000003338action=OBSERVEbizStep=https://ref.gs1.org/cbv/BizStep-departingreadPointid=https://id.gs1.org/414/4012345000115/254/987{https://ns.example.com/epcis/}myField1{https://ns.example.com/epcis/}mySubField1=2{https://ns.example.com/epcis/}mySubField2=5{https://ns.example.com/epcis/}myField2=0{https://ns.example.com/epcis/}myField3{https://ns.example.com/epcis/}mySubField3=1{https://ns.example.com/epcis/}mySubField3=3

...and calculates the following hash value: ni:///sha-256;6ae96341e0acc6d7a261364751f60e68278a81cdf51da0abb6b4e617014e39d7?ver=CBV2.0

Once this is ascertained, update illustation in readMe + check hash value in https://github.com/RalphTro/epcis-event-hash-generator/blob/master/tests/examples/ReferenceEventHashAlgorithm.hashes

RalphTro commented 1 year ago

Update: latest PR ('FixcheckDigit_Canonicalisation_Issue') calculates exactly this hash value.

RalphTro commented 1 year ago

Adjusted as of latest PR/readMe update