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NAME

       crypto - The Crypto Application

DESCRIPTION

       The  purpose of the Crypto application is to provide message digest and
       DES encryption for SMNPv3. It provides computation of  message  digests
       MD5 and SHA, and CBC-DES encryption and decryption.

CONFIGURATION

       The  following environment configuration parameters are defined for the
       Crypto application. Refer to  application(3erl)  for  more  information
       about configuration parameters.

         debug = true | false <optional>:
             Causes  debug  information  to  be  written  to standard error or
             standard output. Default is false.

OPENSSL LIBRARIES

       The current implementation of the Erlang Crypto application is based on
       the  OpenSSL  package  version  0.9.7  or  higher. There are source and
       binary releases on the web.

       Source  releases  of  OpenSSL  can  be  downloaded  from  the   OpenSSL
       <http://www.openssl.org>  project  home  page,  or  mirror sites listed
       there.

       The same  URL  also  contains  links  to  some  compiled  binaries  and
       libraries  of  OpenSSL  (see  the  Related/Binaries  menu) of which the
       Shining      Light      Productions       Win32       and       OpenSSL
       <http://www.shininglightpro.com/search.php?searchname=Win32+OpenSSL>
       pages are of interest for the Win32 user.

       For some Unix flavours there are binary packages available on the  net.

       If you cannot find a suitable binary OpenSSL package, you have to fetch
       an OpenSSL source release and compile it.

       You then have to compile and install the library  libcrypto.so  (Unix),
       or the library libeay32.dll (Win32).

       For  Unix  The crypto_drv dynamic driver is delivered linked to OpenSSL
       libraries in /usr/local/lib, but the default dynamic linking will  also
       accept libraries in /lib and /usr/lib.

       If that is not applicable to the particular Unix operating system used,
       the example Makefile in the Crypto priv/obj directory, should  be  used
       as a basis for relinking the final version of the port program.

       For  Win32  it  is only required that the library can be found from the
       PATH environment variable, or  that  they  reside  in  the  appropriate
       SYSTEM32  directory;  hence  no  particular relinking is need. Hence no
       example Makefile for Win32 is provided.

SEE ALSO

       application(3erl)