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In which phase of TLS handshake server can require client certificate?
As dedicated step, Just before ServerKeyExchange message
As dedicated step, after ServerKeyExchange message
As part of ServerKeyExchange message.
RFC 5246:
7.4.4. Certificate Request
When this message will be sent:
A non-anonymous server can optionally request a certificate from
the client, if appropriate for the selected cipher suite. This
message, if sent, will immediately follow the ServerKeyExchange
message (if it is sent; otherwise, this message follows the
server's Certificate message).
Note: Explanation above does not reflect both correct answers, only one.
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