After I do the SSL initialization, I do the following in my server code.
while(1){
if((s=accept(sock,0,0))<0)
err_exit("Problem accepting");
sbio=BIO_new_socket(s,BIO_NOCLOSE);
ssl=SSL_new(ctx);
SSL_set_bio(ssl,sbio,sbio);
SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, verify_callback);
if((r=SSL_accept(ssl)<=0))
err_exit("SSL accept error");
peer = SSL_get_peer_certificate(ssl);
if (peer == NULL) {
printf("Null presented by peer \n");
}
The first time the client connects and does the SSL handhshake, when the
server makes a request for a client certificate, it gets a NULL. But on
subsequent calls from the client, the server is able to get the client
certificate.
What could be going wrong the first time this happens?
If I make it SSL_set_verify() instead of SSL_CTX_set_verify(), the server
gets the peer certificate but the callback function is not called.
I am confused as to why this is happening and would appreciate any ideas to
solving this problem.
Thanks
Ramdas
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