Add ChaCha and XSalsa20 to specs.

Author: timw

docs/specifications.html

@@ -231,7 +231,9 @@ <h4>Symmetric (Stream)</h4>
 <tr><td><b>RC4Engine</b></td><td>40 .. 2048</td><td>&nbsp;</td></tr>
 <tr><td><b>HC128Engine</b></td><td>128</td><td>&nbsp;</td></tr>
 <tr><td><b>HC256Engine</b></td><td>256</td><td>&nbsp;</td></tr>
-<tr><td><b>Salsa20Engine</b></td><td>128/256</td><td>&nbsp;</td></tr>
+<tr><td><b>ChaChaEngine</b></td><td>128/256</td><td>64 bit IV</td></tr>
+<tr><td><b>Salsa20Engine</b></td><td>128/256</td><td>64 bit IV</td></tr>
+<tr><td><b>XSalsa20Engine</b></td><td>256</td><td>192 bit IV</td></tr>
 <tr><td><b>ISAACEngine</b></td><td>32 .. 8192</td><td>&nbsp;</td></tr>
 <tr><td><b>VMPCEngine</b></td><td>8 .. 6144</td><td>&nbsp;</td></tr>
 <tr><td><b>Grainv1Engine</b></td><td>80</td><td>64 bit IV</td></tr>
@@ -575,7 +577,9 @@ <h4>Symmetric (Stream)</h4>
 <tr><td>RC4</td><td>40 .. 2048 bits <b>(128)</b></td><td>&nbsp;</td></tr>
 <tr><td>HC128</td><td>(128)</td><td>&nbsp;</td></tr>
 <tr><td>HC256</td><td>(256)</td><td>&nbsp;</td></tr>
-<tr><td>Salsa20</td><td>128/256<b>(128)</b></td><td>&nbsp;</td></tr>
+<tr><td>ChaCha</td><td><b>128</b>/256</td><td>64 bit IV</td></tr>
+<tr><td>Salsa20</td><td><b>128</b>/256</td><td>64 bit IV</td></tr>
+<tr><td>XSalsa20</td><td>256</td><td>182 bit IV</td></tr>
 <tr><td>VMPC</td><td>128/6144<b>(128)</b></td><td>&nbsp;</td></tr>
 <tr><td>Grainv1</b></td><td>80</td><td>64 bit IV</td></tr>
 <tr><td>Grain128</b></td><td>128</td><td>96 bit IV</td></tr>