MakePassword()
Last updated December 18, 2001
Version: 1 | Requires: ColdFusion 5 | Library: SecurityLib
Description:
Generates a random 8-character password
that is free of annoying easily confused characters such as 1 or l, O or 0. This is done by taking a UUID, combining parts of it into two-byte chunks, and treating the two-byte chunk as a hexadecimal number. This number is then converted into base-10 and converted into a chr().
This is done until 8 such chars are generated. The result is compared to see if any unwanted similar chars exist, and if so, the sequence is re-ran.
This is done by taking a UUID, combining parts of it into two-byte chunks, and treating the two-byte chunk as a hexadecimal number. This number is then
converted into base-10 and converted into a chr().
This is done until 8 such chars are generated. The result is compared to see if any
unwanted similar chars exist, and if so, the sequence is re-ran.
Return Values:
Returns a string.
Example:
Here is a random password: #MakePassword()#
</CFOUTPUT>
Parameters:
No arguments.
Full UDF Source:
<cfscript>
/**
* Generates an 8-character random password free of annoying similar-looking characters such as 1 or l.
*
* @return Returns a string.
* @author Alan McCollough (amccollough@anmc.org)
* @version 1, December 18, 2001
*/
function MakePassword()
{
var valid_password = 0;
var loopindex = 0;
var this_char = "";
var seed = "";
var new_password = "";
var new_password_seed = "";
while (valid_password eq 0){
new_password = "";
new_password_seed = CreateUUID();
for(loopindex=20; loopindex LT 35; loopindex = loopindex + 2){
this_char = inputbasen(mid(new_password_seed, loopindex,2),16);
seed = int(inputbasen(mid(new_password_seed,loopindex/2-9,1),16) mod 3)+1;
switch(seed){
case "1": {
new_password = new_password & chr(int((this_char mod 9) + 48));
break;
}
case "2": {
new_password = new_password & chr(int((this_char mod 26) + 65));
break;
}
case "3": {
new_password = new_password & chr(int((this_char mod 26) + 97));
break;
}
} //end switch
}
valid_password = iif(refind("(O|o|0|i|l|1|I|5|S)",new_password) gt 0,0,1);
}
return new_password;
}
</cfscript>
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