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.TH crypto 6 "crypto 1.5.2" "Ericsson AB" "ERLANG APPLICATION DEFINITION"
.SH APPLICATION
crypto \- The Crypto Application
.SH DESCRIPTION
.LP
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\&.
.LP
.SH CONFIGURATION
.LP
The following environment configuration parameters are defined for the Crypto application\&. Refer to application(3) for more information about configuration parameters\&.
.RS 2
.TP 4
.B
\fIdebug = true | false <optional>\fR:
Causes debug information to be written to standard error or standard output\&. Default is \fIfalse\fR\&.
.RE
.SH OPENSSL LIBRARIES
.LP
The current implementation of the Erlang Crypto application is based on the \fIOpenSSL\fR package version 0\&.9\&.7 or higher\&. There are source and binary releases on the web\&.
.LP
Source releases of OpenSSL can be downloaded from the OpenSSL <http://www\&.openssl\&.org> project home page, or mirror sites listed there\&.
.LP
The same URL also contains links to some compiled binaries and libraries of OpenSSL (see the \fIRelated/Binaries\fR 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\&.
.LP
For some Unix flavours there are binary packages available on the net\&.
.LP
If you cannot find a suitable binary OpenSSL package, you have to fetch an OpenSSL source release and compile it\&.
.LP
You then have to compile and install the library \fIlibcrypto\&.so\fR (Unix), or the library \fIlibeay32\&.dll\fR (Win32)\&.
.LP
For Unix The \fIcrypto_drv\fR dynamic driver is delivered linked to OpenSSL libraries in \fI/usr/local/lib\fR, but the default dynamic linking will also accept libraries in \fI/lib\fR and \fI/usr/lib\fR\&.
.LP
If that is not applicable to the particular Unix operating system used, the example \fIMakefile\fR in the Crypto \fIpriv/obj\fR directory, should be used as a basis for relinking the final version of the port program\&.
.LP
For \fIWin32\fR it is only required that the library can be found from the \fIPATH\fR environment variable, or that they reside in the appropriate \fISYSTEM32\fR directory; hence no particular relinking is need\&. Hence no example \fIMakefile\fR for Win32 is provided\&.
.SH SEE ALSO
.LP
application(3)
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