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diff --git a/docs/tutorials/015/page21.html b/docs/tutorials/015/page21.html deleted file mode 100644 index daf4d2bc065..00000000000 --- a/docs/tutorials/015/page21.html +++ /dev/null @@ -1,107 +0,0 @@ -<!-- $Id$ --> -<HTML> -<HEAD> - <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> - <META NAME="Author" CONTENT="James CE Johnson"> - <TITLE>ACE Tutorial 015</TITLE> -</HEAD> -<BODY TEXT="#000000" BGCOLOR="#FFFFFF" LINK="#000FFF" VLINK="#FF0F0F"> - -<CENTER><B><FONT SIZE=+2>ACE Tutorial 015</FONT></B></CENTER> - -<CENTER><B><FONT SIZE=+2>Building a protocol stream</FONT></B></CENTER> - -<P> -<HR WIDTH="100%"> -The encryption implementation isn't any smarter than that of the -compressor. Still, the hooks are there for you to insert your -favorite library. -<HR> -<PRE> - -<font color=red>// $Id$</font> - -<font color=blue>#include</font> "<font color=green>Crypt.h</font>" -<font color=blue>#include</font> "<A HREF="../../../ace/SOCK_Stream.h">ace/SOCK_Stream.h</A>" - -<font color=red>/* The expected constructor... - */</font> -<font color=#008888>Crypt::Crypt</font>( void ) - : Protocol_Task() -{ -} - -<font color=#008888>Crypt::~Crypt</font>(void) -{ -} - -<font color=red>/* To send the data we'll apply a signature and encryption. - */</font> -int <font color=#008888>Crypt::send</font>(ACE_Message_Block *message, ACE_Time_Value *timeout) -{ - ACE_UNUSED_ARG(timeout); - - ACE_DEBUG ((LM_INFO, "<font color=green>(%P|%t) <font color=#008888>Crypt::send</font>() encrypting (%s)\n</font>", message->rd_ptr() )); - - <font color=red>// I suspect that some encryptors might change the data size.</font> - <font color=red>// It probably isn't safe to create a same-size destination buffer.</font> - ACE_Message_Block * encrypted = new ACE_Message_Block( - message->size() +16 ); - - <font color=red>// Perform a bogus encryption algorithm and add our safety</font> - <font color=red>// signature. Adding the original data size is also probably</font> - <font color=red>// a good idea that I haven't encorporated here.</font> - <font color=#008888>ACE_OS::sprintf</font>( encrypted->wr_ptr(), "<font color=green>ED:%s</font>", message->rd_ptr() ); - encrypted->wr_ptr( strlen(encrypted->wr_ptr())+1 ); - - <font color=red>// Send the encrypted data down the stream to the next module</font> - this->put_next( encrypted ); - - <font color=red>// We're done here.</font> - message->release(); - - return( 0 ); -} - -<font color=red>/* The upstream movement requires that we decrypt what the peer has - given us. -*/</font> -int <font color=#008888>Crypt::recv</font>(ACE_Message_Block *message, ACE_Time_Value *timeout) -{ - ACE_UNUSED_ARG(timeout); - - ACE_DEBUG ((LM_INFO, "<font color=green>(%P|%t) <font color=#008888>Crypt::recv</font>() decrypting (%s)\n</font>", message->rd_ptr() )); - - <font color=red>// Create a destination for the decrypted data. The same</font> - <font color=red>// block size caveat exists of course.</font> - ACE_Message_Block * decrypted = new ACE_Message_Block( - message->size() +16 ); - - <font color=red>// Check the signature as expected.</font> - if( <font color=#008888>ACE_OS::strncmp</font>( message->rd_ptr(), "<font color=green>ED:</font>", 3 ) ) - { - ACE_DEBUG ((LM_INFO, "<font color=green>(%P|%t) Improperly encrypted data.\n</font>" )); - message->release(); - return(-1); - } - - <font color=red>// Don't forget to skip past the signature before decrypting</font> - <font color=red>// or things will be quite exciting!</font> - message->rd_ptr( 3 ); - - <font color=red>// Perform a bogus decryption algorithm</font> - <font color=#008888>ACE_OS::sprintf</font>( decrypted->wr_ptr(), "<font color=green>%s</font>", message->rd_ptr() ); - decrypted->wr_ptr( strlen(decrypted->wr_ptr())+1 ); - - <font color=red>// Send the decrypted data down the stream to the next module</font> - this->put_next( decrypted ); - - <font color=red>// We're done here.</font> - message->release(); - - return( 0 ); -} -</PRE> -<P><HR WIDTH="100%"> -<CENTER>[<A HREF="../online-tutorials.html">Tutorial Index</A>] [<A HREF="page22.html">Continue This Tutorial</A>]</CENTER> - |