<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
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--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'>Hi,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'>Happy Holidays everyone.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'>I want to send client certificate, client key exchange and client verify in a single handshake message which appears as multiple handshake messages in a single record. But to sent the client verify I need to first make a hash of previous messages(client certificate and client key exchange) to create the signature.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'>Can anyone help me to find the function in OpenSSL 1.1.1-dev xx XXX xxxx (or right procedure that needs to be done before creating a certificate verify message)that can do a proper transcript(digest or hash not clear). I tried using <b>ssl3_finish_mac() </b>on the message containing client certificate and client key exchange and then tried to generate the signature in certificate verify message.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'>But it is giving me a digest error. I am new to the mailing list want a bit of help to proceed forward stuck here. Please reply in case if anything is not clear.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'>Here is a code snippet, how I am forming the data containing all client certificate , client key exchange and certificate verify messages inside write_state_machine().<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'>if(WPACKET_init(&pkt, s->init_buf)){<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'>//Client certificate formation<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> if(!ssl_set_handshake_header(s,&pkt,mt) || confunc != NULL && !confunc(s,&pkt) || !ssl_close_construct_packet(s,&pkt,mt)){<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> printf("PROBLEM\n");<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> }<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> transition(s); //transition to next state i.e client key exchange<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> get_construct_message_f(s, &pkt, &confunc, &mt);<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'>//client key exchange formation<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> if(!ssl_set_handshake_header(s,&pkt,mt) || confunc != NULL && !confunc(s,&pkt) || !ssl_close_construct_packet(s,&pkt,mt)){<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> printf("AGAIN A PROBLEMO\n");<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> }<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'>//ssl3_finish_mac(s, &s->init_buf->data[s->init_off], s->init_num);<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> st->write_state_work = post_work(s, st->write_state_work);<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> transition(s); // transition to next state i.e certificate verify<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> get_construct_message_f(s, &pkt, &confunc, &mt);<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'>//certificate verify message formation.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> if(!ssl_set_handshake_header(s,&pkt,mt) || confunc != NULL && !confunc(s,&pkt) || !ssl_close_construct_packet(s,&pkt,mt)){<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> printf("AGAIN A PROBLEMO\n");<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> }<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'> WPACKET_finish(&pkt);<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'>Please take a look at it, appreciate every bit of help.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Comic Sans MS"'><o:p> </o:p></span></p><p class=MsoNormal>Regards,<o:p></o:p></p><p class=MsoNormal>Saiteja</p><p class=MsoNormal><o:p> </o:p></p></div></body></html>