From: kermit
Subject: Code snippet - random password generator
Date: Thu, 29 Mar 2001 16:53:21 -0800
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This script generates a random word 7 letters long plus 4 digits long.
Example code:
<cfset random_word = "">
<cfloop index="ii" from="1" to="7">
<cfset random_number = "#RandRange(1,26)#">
<cfset alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ">
<cfset random_letter = "#Mid(alphabet,random_number,1)#">
<cfset random_word = "#ListAppend(random_word,random_letter)#">
</cfloop>
<cfset random_word = "#Replace(random_word, ",", "", "ALL")#">
<cfset random_number = "#RandRange(1000,9999)#">
<cfset password = "#random_word##random_number#">
<cfoutput>PASSWORD: <b>#password#</b></cfoutput>
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From: Raymond B.
Subject: RE: Code snippet - random password generator
Date: Thu, 29 Mar 2001 18:37:14 -0800
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Why define the alphabet? Just use decimal values for the asci char set.
pass = "" ;
for (c=1; c le 7; c=c+1) {
pass = pass & chr(randRange(65,90)) ;
}
pass = pass & randRange(1000,9999) ;
That will do the exact same thing as below much more efficiently, if you
want case sensitive or nums mixed w/ chars it's just a couple extra
rangRanges()s (you can get creative and generate one of each class then
randRange(1,3) to choose which per digit).
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From: Jay Jennings
Subject: RE: Code snippet - random password generator
Date: Thu, 29 Mar 2001 18:55:39 -0800
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> Why define the alphabet? Just use decimal values for the asci char set.
So, just because I'm bored, in the unrolled loop I created I change the
alphabet to Raymond's chr:
<cfset random_word = random_word & chr(randRange(65,90))>
The speed increase was fairly slight:
Original code (executed 1000 times): 9994 ms (average)
Unrolled code (executed 1000 times): 1993 ms (average)
Unrolled w/chr (executed 1000 times): 1932 ms (average)
But it looks much nicer than repeating the alphabet in each line.
I was going to mention that when I generate passwords I tend to NOT use the
letters O, I and L and the numbers 1 and 0. Those create too many "my
password doesn't work!" tech support calls.
..jj..
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Hope this helps :)
-Gel
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