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Full Discussion: UNIX fun stuff - echo and dc - obfuscate/garble a string sort of
Top Forums UNIX for Dummies Questions & Answers UNIX fun stuff - echo and dc - obfuscate/garble a string sort of Post 302938409 by Don Cragun on Monday 16th of March 2015 01:22:34 AM
Old 03-16-2015
First: Note that:
Code:
dc <<EOF | echo
obfuscated string
EOF

produces exactly the same output as:
Code:
echo

The echo utility doesn't read arguments from standard input; it reads arguments from its argument list.

Second: If you're going to email a new password to your users, sending it to them in clear text and sending it to them with instructions saying something like:
Quote:
You can see your new password by executing the command:
echo 'obfuscated string' | dc
are equivalent. Anyone who intercepts that message will be able to run the command to produce the clear text just as easily as the user to whom the e-mail was addressed.

Third: If you send the obfuscated password and the way to turn it into plain text in separate e-mails, you have a better chance of keeping the clear text hidden. But if one e-mail message has been intercepted, there is no reason to believe that another message (containing the way to turn the obfuscated password into clear text) will not also be intercepted.

Fourth: You would be MUCH better off providing a secure method for the user to retrieve their password by distributing the new password:
  • in person (verifying employee IDs if you don't know your users),
  • providing a secure website (requiring the old password to get the new password), or
  • by a secure method of distributing hard copy of the new password (such as registered US snail mail).
This User Gave Thanks to Don Cragun For This Post:
newbie_01
 

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LEARN ABOUT CENTOS

locale::codes::langfam

Locale::Codes::LangFam(3)				User Contributed Perl Documentation				 Locale::Codes::LangFam(3)

NAME

       Locale::Codes::LangFam - standard codes for language extension identification

SYNOPSIS

	  use Locale::Codes::LangFam;

	  $lext = code2langfam('apa');		       # $lext gets 'Apache languages'
	  $code = langfam2code('Apache languages');    # $code gets 'apa'

	  @codes   = all_langfam_codes();
	  @names   = all_langfam_names();

DESCRIPTION

       The "Locale::Codes::LangFam" module provides access to standard codes used for identifying language families, such as those as defined in
       ISO 639-5.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 639-5
       language family codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language families. A code set may be specified using either a name, or a
       constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lext = code2langfam('apa','alpha');
	  $lext = code2langfam('apa',LOCALE_LANGFAM_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from ISO 639-5 such as 'apa' for Apache languages.

	   This is the default code set.

ROUTINES

       code2langfam ( CODE [,CODESET] )
       langfam2code ( NAME [,CODESET] )
       langfam_code2code ( CODE ,CODESET ,CODESET2 )
       all_langfam_codes ( [CODESET] )
       all_langfam_names ( [CODESET] )
       Locale::Codes::LangFam::rename_langfam  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangFam::add_langfam  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangFam::delete_langfam  ( CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangFam::delete_langfam_alias  ( NAME )
       Locale::Codes::LangFam::rename_langfam_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::delete_langfam_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.loc.gov/standards/iso639-5/id.php
	   ISO 639-5 .

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2013 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.16.3							    2013-02-27						 Locale::Codes::LangFam(3)
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