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sha1 question

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# 8  
Old 03-06-2011
Quote:
Originally Posted by locoroco
These two scripts don't seem to match, so I don't know what I have done wrong.
[...]
My code is wrong, the here-string, <<< string, adds a trailing newline.

This should be OK (it still requires bash4,in order to avoid the call to another external command):

Code:
user=MyUser pass=mypass sessionid=mysessionid
_sha1=$(printf %s "${user,,}$pass"|sha1sum)
_sha1=${_sha1% *}$sessionid _sha1=$(printf %s $_sha1|sha1sum)
printf '%s\n' ${_sha1% *}

# 9  
Old 03-06-2011
This works for bash 3 and later.
Code:
#!/bin/bash

user=MyUser pass=mypass sessionid=mysessionid

user=$(echo $user | tr '[:upper:]' '[:lower:]')

_sha1=$(printf %s%s $user $pass | sha1)
_sha1=$(printf %s%s ${_sha1}${sessionid} | sha1)

printf '%s\n' ${_sha1}

Last edited by fpmurphy; 03-07-2011 at 01:22 AM.. Reason: fixed up error in code reported by Alister
# 10  
Old 03-06-2011
Hi, fpmurphy:

Quote:
Originally Posted by fpmurphy
Code:
_sha1=$(printf %s%s ${user}${pass} | tr '[:upper:]' '[:lower:]' | sha1sum)

The original php code does not modify $pass, so it should not be piped through tr.

Regards,
Alister
# 11  
Old 03-06-2011
Quote:
Originally Posted by alister
Hi, fpmurphy:
The original php code does not modify $pass, so it should not be piped through tr.
Err, does not give correct solution unless the pipe is there. And I am not modifying $pass!
# 12  
Old 03-06-2011
It works with that sample data because $pass is all lower case, but if there were an upper case character in $pass, the result would be incorrect.
This User Gave Thanks to alister For This Post:
fpmurphy
# 13  
Old 03-07-2011
Quote:
Originally Posted by alister
It works with that sample data because $pass is all lower case, but if there were an upper case character in $pass, the result would be incorrect.
Ah, well spotted. You are correct. I will fix my example code.
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