Is there generic Encryption / Masking Tool available ? Post: 302983242

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Top Forums Shell Programming and Scripting Is there generic Encryption / Masking Tool available ? Post 302983242 by Don Cragun on Saturday 8th of October 2016 01:44:38 PM

10-08-2016

Registered User

The crypt() function is required by the POSIX Standard (and is there so passwords can be encrypted). But that is a one-way operation. You can use crypt() to encrypt your password and you can use crypt() to encode a user-entered password guess and then use strcmp() to see if the two encrypted strings match.

There is also the encrypt() function (which is in the current standards) and the crypt utility (which is not in the current standards), which are capable of encoding and decoding text. But, US government regulations prohibit exporting that code to many other countries. So while a Solaris system shipped by Oracle to a US customer might contain the crypt utility and the encrypt() function, a corresponding Solaris system sent to China, Iran, or Russia (and maybe any other country outside the US borders) would get a an encrypt() function in libc that always fails and returns with errno set to ENOTSUP when asked to decode encrypted text (and maybe also when asked to encode text). I no idea whether systems Oracle ships with the reduced capability encrypt() are shipped with a non-functioning crypt utility or if it is dropped from the distribution completely.

Don Cragun

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encrypt

crypt(3C)																 crypt(3C)

NAME

       crypt  - generate hashing encryption

SYNOPSIS

   Obsolescent Interfaces
DESCRIPTION

   crypt():
       is  the	password encryption function.  It is based on a one way hashing encryption algorithm with variations intended (among other things)
       to frustrate use of hardware implementations of a key search.

       key is a user's typed password.	salt is a two-character string chosen from the set this string is used to perturb the hashing algorithm in
       one of 4096 different ways, after which the password is used as the key to encrypt repeatedly a constant string.  The returned value points
       to the encrypted password.  The first two characters are the salt itself.

   Obsolescent Interfaces
       generate hashing encryption.

WARNINGS

       The return value for points to data whose content is overwritten by each call.

       and are obsolescent interfaces  supported only for compatibility with existing DCE applications. New multithreaded applications should use

SEE ALSO

       crypt(1), login(1), passwd(1), getpass(3C), passwd(4), thread_safety(5).

STANDARDS CONFORMANCE

																	 crypt(3C)