Hi,
Happy Holidays everyone.
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.
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 ssl3_finish_mac() on the message containing client certificate and client
key exchange and then tried to generate the signature in certificate verify
message.
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.
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().
if(WPACKET_init(&pkt, s->init_buf)){
//Client certificate formation
if(!ssl_set_handshake_header(s,&pkt,mt) || confunc != NULL &&
!confunc(s,&pkt) || !ssl_close_construct_packet(s,&pkt,mt)){
printf("PROBLEM\n");
}
transition(s); //transition to next state i.e client key exchange
get_construct_message_f(s, &pkt, &confunc, &mt);
//client key exchange formation
if(!ssl_set_handshake_header(s,&pkt,mt) || confunc != NULL &&
!confunc(s,&pkt) || !ssl_close_construct_packet(s,&pkt,mt)){
printf("AGAIN A PROBLEMO\n");
}
//ssl3_finish_mac(s, &s->init_buf->data[s->init_off], s->init_num);
st->write_state_work = post_work(s, st->write_state_work);
transition(s); // transition to next state i.e certificate verify
get_construct_message_f(s, &pkt, &confunc, &mt);
//certificate verify message formation.
if(!ssl_set_handshake_header(s,&pkt,mt) || confunc != NULL &&
!confunc(s,&pkt) ||
!ssl_close_construct_packet(s,&pkt,mt)){
printf("AGAIN A PROBLEMO\n");
}
WPACKET_finish(&pkt);
Please take a look at it, appreciate every bit of help.
Regards,
Saiteja
--
openssl-users mailing list
To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users
