Hello all. I'm very confused by the following problem. I have some server code that used blocking sockets and OpenSSL. All worked well. Then I converted the server code to use non blocking sockets. I then reimplemented the OpenSSL layer to use the non blocking sockets and memory bio. It uses the transparent handshaking that OpenSSL can do, so in the non-blocking case I never call SSL_connect or SSL_accept. I just set things up by calling either SSL_set_connect_state() or SSL_set_accept_state().
The non blocking client side seems to work fine. But the server side code will not get beyond the initial handshake from a client. OpenSSL always returns SSL_R_NO_SHARED_CIPHER from SSL_read. I turned on CIPHER_DEBUG in the OpenSSL source and what I found was the following: Blocking Socket Code output (works ) ... rt=0 rte=0 dht=0 ecdht=0 re=1 ree=1 rs=0 ds=0 dhr=0 dhd=0 1:[00000001:00000001:00000101:00000085]0x1003a9698:AES256-SHA ... ( This is where the server successfully picks a cipher) Non Blocking Socket Code .... rt=0 rte=0 dht=0 ecdht=0 re=0 ree=0 rs=0 ds=0 dhr=0 dhd=0 0:[00000001:00000001:00000100:00000084]0x1003cacb8:AES256-SHA .... I built the self signed certificate in exactly the same way in both cases, so I'm not sure at all why it's failing and what the difference is in these debugging statements. I'm no OpenSSL expert, so if anyone has any idea what I'm doing wrong in the non-blocking case, I'd be very happy to hear about it. Thanks, Scott______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
