Re: [EXTERNAL] Program to Calculate Hash using SHA-256 of a file

[Tim Bronski <tim.bronski@xxxxxxxxx>]

A HMAC and a plain SHA256 hash are not the same thing. Are you looking 
for a hash of a file or a "signature"?


On 8/17/2018 4:12 PM, Alan Shore wrote:
> Hi
> Look at this api
> Qc3CalculateHMAC
>
>
> I hope this helps
>
> This is what we used in a service program I wrote MANY moons ago
> It took me a while to sort this out - and Im sorry to say, but I cannot remember who - but someone from this list proved invaluable in helping me sort this out
>
> This is the code
> monitor;
>     Qc3CalculateHMAC( ConvdataToHash
>                     : DataLen
>                     : 'DATA0100'
>                     : SHA_256
>                     : 'ALGD0500'
>                     : my_key
>                     : 'KEYD0200'
>                     : '0'
>                     : *blanks
>                     : binaryHMAC
>                     : ErrorCode );
>   on-error;
>     HldErrorcode = ErrorCode;
>   endmon;
>
> d ConvdataToHash...
> d                 s            500a
> D DataLen         s             10i 0
> d SHA_256         c                   const(3)
> d binaryHMAC...
> D                 s          32765
>
> D my_key          DS                  qualified
> D    Type                       10i 0 inz(SHA_256)
> D    Len                        10i 0
> D    Fmt                         1a   inz('0')
> D                                3a
> D    Value                      92a
>
> D ErrorCode       DS                  qualified
> D    bytesProv                  10i 0 inz(0)
> D    bytesAvail                 10i 0 inz(0)
>
> Alan Shore
> E-mail : ASHORE@xxxxxxxx
> Phone [O] : (631) 200-5019
> Phone [C] : (631) 880-8640
> ‘If you're going through hell, keep going.’
> Winston Churchill
>
> -----Original Message-----
> From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of p.caroti@xxxxxxxx
> Sent: Friday, August 17, 2018 9:58 AM
> To: midrange-l@xxxxxxxxxxxx
> Subject: [EXTERNAL] Program to Calculate Hash using SHA-256 of a file
>
> Hi all
>
> I'm looking for an example how to calculate Hash using SHA-256 . be patient for my request : this should be run on V5R2m0 (it would be possible)
>
> I found this old link
> https://www.experts-exchange.com/questions/20502110/Need-to-call-MD5-algorit
> hm-from-RPGLE.html, but i don't know how to (if possible) adapt to SHA-256
>
> Thanks in in advance
>
>   
>
>
>
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