do shell script Result Differs from Terminal Result

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do shell script Result Differs from Terminal Result

I'm attempting to write an AppleScript that needs to generate a SHA256 hash from a Variable.

Using do shell script, OpenSSL is given a string to hash. However the result given from AppleScript is different to the result given from Terminal.

AppleScript:

set myString to do shell script ("echo -n stringtohash | /usr/local/bin/openssl sha256 2>&1")

display dialog (myString)

Terminal:

Computer:~ Matt$ echo -n stringtohash | /usr/local/bin/openssl sha256 2>&1

(stdin)= bc287cfa8c0c84f0b1489bc70ec1bdf75e593c13dc8b8a19bc2d0039966d69d1

MacBook Pro (Retina, 15-inch, Late 2013), macOS Sierra (10.12.5)

Posted on Sep 1, 2017 12:14 AM

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Answer 1

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mattchesters Author

Level 1

4 points

Sep 1, 2017 1:28 AM in response to mattchesters

Found answer in previous discussion: "do shell script" returns different from Terminal. Why?

It looks like the shell built-in command uses a different encoding, so using printf or the standalone echo should give more consistent results:

do shell script "/bin/echo -n 'RolfAaberge'|openssl sha1"

Works for me:

do shell script ("/bin/echo -n stringtohash | /usr/local/bin/openssl sha256 2>&1")

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