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</head><body lang="EN-IN" link="#0563C1" vlink="#954F72" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"> We are trying to upgrade our application from openssl usage of 1.0.2 to openssl 3.0, during which we observe following errors.
<o:p></o:p></p>
<p class="MsoNormal">Need help to identify the alternatives.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Error1 : <span style="background:yellow;mso-highlight:yellow">
error: 'HMAC' was not declared in this scope HMAC(EVP_sha1(), (const void*) cookie_secret, COOKIE_SECRET_LENGTH</span>,<o:p></o:p></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo2">HMAC is deprecated in 3.0 but not finding the suitable replacement to use in application.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo2">We feel we can use EVP_MAC API’s, but not sure the exact API which replaces HMAC<o:p></o:p></li></ul>
<p class="MsoListParagraph"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Error2 : <span style="background:yellow;mso-highlight:yellow">
error: invalid use of incomplete type 'SSL' {aka 'struct ssl_st'} ssl->d1->mtu = MAX_SEND_PKT_SIZE</span>;<o:p></o:p></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo2">Our application is trying to set the MTU size but can not access d1 of 'struct ssl_st'.
<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo2">Any utility exposed to applications similar to API dtls1_ctrl which is mostly an internal one<o:p></o:p></li></ul>
<p class="MsoNormal"><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">Sunil <o:p></o:p></p>
</div>
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