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Why are they DS fields? You are not really defining data structures - just big fields. Also they only seem to be being used for printing and you could use most anything for that - your real program assumedly doesn't print anything.

I think it might be useful for you to backtrack and lay out for us what you are trying to do.

For example - in my experience things like your exchange token are usually encoded for a fixed length - yet you seem to be dealing with a variable length field.

In other words I'm not convinced that we are helping you solve the real problem - rather we are dealing with problems caused by your attempts to debug the real problems.


On Nov 19, 2019, at 5:52 AM, Rishi Seth <rishiseth99@xxxxxxxxx> wrote:

ok,thanks all for your help and detailed explanation but considering my
scenario as these record and outrec are data structure fields so can't use
varying keyword so unable to use %trimr properly and program keeps writing
so called junk values after decrypted value so what can i do neither can
use them as stand alone fields nor could use varying keyword and end result
is getting those junk values written in my flat file could you please refer
below link to advise for this program code to resolve this issue.

*https://code.midrange.com/abc9f7368e.html <https://code.midrange.com/abc9f7368e.html>
<https://code.midrange.com/abc9f7368e.html <https://code.midrange.com/abc9f7368e.html>>*

Thanks

On Mon, Nov 18, 2019 at 11:29 PM Bruce Vining <bruce.vining@xxxxxxxxx <mailto:bruce.vining@xxxxxxxxx>>
wrote:

From an earlier posting:

-- From your code, the following does you no good because the target
--variable is not variable-length.

--eval pos1= %scan(' ':encodedExchangeToken);
--eval encodedExchangeToken = %subst(encodedExchangeToken:1:POS1-1);

-- If you change the target variable to variable length then you only
--have to do the following -- no scan required (this sets the prefix length
--correctly):

Just pointing out that not only is the %scan not required, it's flat out
wrong if there happens to be an embedded blank (x'40') in
encodeExchangeToken.

As pointed out by many, %trimr is a proper way to handle trailing blanks
being found in a varying field (though that's also assuming that there are
not one or more significant blanks (x'40's) in the last byte positions of
the varying field). When variable value length is important using fixed
length fields just introduces unnecessary risk.

On Mon, Nov 18, 2019 at 12:48 PM <dlclark@xxxxxxxxxxxxxxxx <mailto:dlclark@xxxxxxxxxxxxxxxx>> wrote:

From your code, the following does you no good because the target
variable is not variable-length.

eval pos1= %scan(' ':encodedExchangeToken);
eval encodedExchangeToken = %subst(encodedExchangeToken:1:POS1-1);

If you change the target variable to variable length then you
only
have to do the following -- no scan required (this sets the prefix length
correctly):

eval encodedExchangeToken = %trimr(encodedExchangeToken);

Then the following will work without any additional changes
required (RPG is smart enough to use only the prefix length and ignore
the
rest):

cmd = 'echo ' + '''' + encodedExchangeToken + ''' ! openssl +
enc -d -aes-128-ecb -K 363631653237354f494d31554c594c4a +
-nopad -nosalt -base64 -A';

Sincerely,

Dave Clark
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