| Handshake Message |
Description |
ClientHello |
The client sends a Hello message to the server to initiate the negotiation of certain SSL session characteristics. |
ServerHello |
ServerHello is the first response to the client-initiated ClientHello message. ServerHello can contain a server certificate and demand the client to authenticate to the server. |
ServerKeyExchange |
If the server has no certificate or the certificate used does not support the Diffie-Hellman protocol, the server must exchange public keys with the client. |
ServerHelloDone |
This message indicates that the server's portion of the Hello message is complete. |
CertificateRequest |
The server sends this request to the client, asking the client to authenticate. The client will respond with either a certificate message or a NoCertificate alert. |
CertificateMessage |
The contents of this message differ between the chosen public key algorithms. The client will try to respond with a suitable certificate based on the chosen encryption algorithm. |
NoCertificate |
The client sends this alert stating that no suitable client certificate exists. This response can result in a termination of the SSL process if the server requires authentication. |
ClientKeyExchange |
If the client forced the server to do a key exchange, the client will respond with its public key. |
Finished |
This message is the last exchange between server and client before data transmission commences. |