DiffieHellman: gracefully handle platforms that fail the sha256 self test, currently only known to be PowerPC. Added support for PHP's built-in hash functions (they were added in 5.1.2) and use them in lieu of the built-in sha256 implementation when available.
<!-- VAR toolbar_button --><a href="{HREF}" {PARENTFLAGS} {FLAGS}>{TEXT}</a>
<!-- ENDVAR toolbar_button -->
<!-- VAR toolbar_label --><div class="label">{TEXT}</div>
<!-- ENDVAR toolbar_label -->
<!-- VAR toolbar_button_selected --><a href="{HREF}" class="current" {PARENTFLAGS} {FLAGS}>{TEXT}</a>
<!-- ENDVAR toolbar_button_selected -->
<!-- VAR toolbar_menu_button --><li><a href="{HREF}" {FLAGS}>{TEXT}</a></li>
<!-- ENDVAR toolbar_menu_button -->
<!-- VAR toolbar_menu_block --><li>{HTML}</li>
<!-- ENDVAR toolbar_menu_block -->
<!-- VAR sidebar_button --><a href="{HREF}" {FLAGS}>{TEXT}</a><br style="display: none;" />
<!-- ENDVAR sidebar_button -->
<!-- VAR sidebar_raw --><span style="text-align: center;">{HTML}</span><br style="display: none;" />
<!-- ENDVAR sidebar_raw -->
<!-- VAR sidebar_heading --><div class="heading">{TEXT}</div>
<!-- ENDVAR sidebar_heading -->
<!-- VAR sidebar_top -->
<div class="recttop">
<table border="0" width="100%" cellspacing="0" cellpadding="0" style="font-size: 1px;">
<tr>
<td style="margin: 0; padding: 0; height: 12px;"> <img alt=" " src="{SCRIPTPATH}/themes/oxygen/images/{STYLE_ID}/border-menu-l.gif" width="12" height="12" /> </td>
<td style="margin: 0; padding: 0; height: 12px;" class="recttoptop"></td>
<td style="margin: 0; padding: 0; height: 12px;"> <img alt=" " src="{SCRIPTPATH}/themes/oxygen/images/{STYLE_ID}/border-menu-r.gif" width="12" height="12" /> </td>
</tr>
</table>
</div>
<div class="sidebar">
<!-- ENDVAR sidebar_top -->
<!-- VAR sidebar_section -->
<div class="slider">
<div class="heading">
<!-- BEGIN in_sidebar_admin -->{ADMIN_START}<!-- END in_sidebar_admin -->
<br style="display: none;" /><br style="display: none;" />
<a class="head" onclick="toggle(this); return false" href="#">{TITLE}</a>
<!-- BEGIN in_sidebar_admin -->{ADMIN_END}<!-- END in_sidebar_admin -->
<br style="display: none;" /><br style="display: none;" />
</div>
<div class="slideblock">{CONTENT}</div>
</div>
<!-- ENDVAR sidebar_section -->
<!-- VAR sidebar_section_raw -->
<div class="slider">
<div class="heading">
<!-- BEGIN in_sidebar_admin -->{ADMIN_START}<!-- END in_sidebar_admin -->
<br style="display: none;" /><br style="display: none;" />
<a class="head" onclick="toggle(this); return false" href="#">{TITLE}</a>
<!-- BEGIN in_sidebar_admin -->{ADMIN_END}<!-- END in_sidebar_admin -->
<br style="display: none;" /><br style="display: none;" />
</div>
<div class="slideblock2">{CONTENT}</div>
</div>
<!-- ENDVAR sidebar_section_raw -->
<!-- VAR sidebar_bottom -->
</div>
<div class="rectbot">
<table border="0" width="100%" cellspacing="0" cellpadding="0" style="font-size: 1px;">
<tr>
<td style="margin: 0; padding: 0; height: 12px;"> <img alt=" " src="{SCRIPTPATH}/themes/oxygen/images/{STYLE_ID}/border-bl.gif" width="12" height="12" /> </td>
<td style="margin: 0; padding: 0; height: 12px;" class="rectbottop"></td>
<td style="margin: 0; padding: 0; height: 12px;"> <img alt=" " src="{SCRIPTPATH}/themes/oxygen/images/{STYLE_ID}/border-br.gif" width="12" height="12" /> </td>
</tr>
</table>
</div>
<!-- ENDVAR sidebar_bottom -->