How to generate SHA256 ?

Question

1.44/5 (4 votes)

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The token is calculated as follows:
sha256(sha256(Request) + "/" + sha256(merchant + "/" + password)), where:

sha256 – calculation of data hash according to the SHA-256 algorithm and hash conversion to HEX in the uppercase format
Request – list of the "key"="value" pairs sorted by key and separated by the "&" character
merchant – Internet shop ID 
password – value set in the PosSecret parameter

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What I have tried:

Please help detail about this and provide sample sha256

Posted 25-Mar-20 21:08pm

Member 14783292

Updated 26-Mar-20 0:30am

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3 solutions

Solution 3

Here's the script you need:

<% ' IMPORTANT: save this file as UTF-8 BOM !!!

function sha256(ByVal input)
	Dim hAlg,hEnc,BinaryStream,enc
	set hAlg=CreateObject("System.Security.Cryptography.SHA256Managed")
	set hEnc=CreateObject("System.Text.UTF8Encoding")	
	input=hAlg.ComputeHash_2(hEnc.GetBytes_4(input))
	' --------- security check ----------
	if NOT varType(input)=8209 then
        Set BinaryStream=CreateObject("ADODB.Stream")
		with BinaryStream
			.Type=2
			.CharSet="utf-8"
			.Open
			.WriteText input
			.Position=0
			.Type=1
			.Position=0
			input=.Read
		end with	
		set BinaryStream=Nothing
	end if
	' ----------------------------------
	set enc=CreateObject("MSXML2.DomDocument").CreateElement("encode")
	enc.dataType="bin.hex"
	enc.nodeTypedValue=input
	sha256=enc.Text
	set enc=nothing
	set hEnc=nothing
	set hAlg=nothing
end function

%>

Posted 19-Jan-24 1:53am

Member 16185614

Updated 19-Jan-24 1:54am

v3

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Richard MacCutchan · Accepted Answer · 2020-03-26T00:31:00

Solution 2

SHA256 Class (System.Security.Cryptography) | Microsoft Docs[^]

Posted 26-Mar-20 0:31am

Richard MacCutchan

phil.o · Accepted Answer · 2020-03-25T21:25:00

Solution 1

Just use your favourite search engine for the words "SHA256 (language of your choice)", and follow some of the numerous documentations and examples which will show up.

Posted 25-Mar-20 21:25pm

phil.o

Comments

Member 14783292 26-Mar-20 3:45am

Yes thanks dear