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<p class="MsoNormal">Dear friends,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> I am looking for optimizing the SSL_write() and SSL_read() operation on an embedded platform.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Below is the setup currently I have<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:.75in;text-indent:-.25in;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Hardware OpenSSL engine library for the platform is present for carrying out any HW AES encryption and AES decryption functionality<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:.75in;text-indent:-.25in;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>The platform requires data to be present in the specific HW memory range before the HW encryption or decryption API be called from the HW OpenSSL engine.
<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:.75in;text-indent:-.25in;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>The application calls SSL_read(pSSL, pbuf, num); and SSL_wirte(pSSL, pbuf, num);<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:.75in;text-indent:-.25in;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">4.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>If we pass a pointer “pbuf” from the HW memory range, we observe the buffer pointer pbuf is not passed to the HW OpenSSL engine, but some other intermediate buffer pointer is getting passed.
<o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:.75in;text-indent:-.25in;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style="mso-list:Ignore">5.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>We are now copying the data from the intermediate buffer passed to the HW OpenSSL engine into the HW memory range for doing the encryption or decryption. And copying back the data from the HW memory range into the intermediate buffer
passed to the HW openssl engine. <o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:.75in"><o:p> </o:p></p>
<p class="MsoNormal">Is there a way I can force the OpenSSL to pass the required buffer pointer to HW OpenSSL engine to avoid any memcpy in the HW OpenSSL engine.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Appreciate any help on this.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Jagan<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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