Client Certificate rfc4246
作者：互联网
https://datatracker.ietf.org/doc/html/rfc5246
7.4.6. Client Certificate
When this message will be sent:
This is the first message the client can send after receiving a
ServerHelloDone message. This message is only sent if the server
requests a certificate. If no suitable certificate is available,
the client MUST send a certificate message containing no
certificates. That is, the certificate_list structure has a
length of zero. If the client does not send any certificates, the
server MAY at its discretion自由裁量权 either continue the handshake without
client authentication, or respond with a fatal handshake_failure
alert. Also, if some aspect of the certificate chain was
unacceptable (e.g., it was not signed by a known, trusted CA), the
server MAY at its discretion either continue the handshake
(considering the client unauthenticated) or send a fatal alert.
Client certificates are sent using the Certificate structure
defined in Section 7.4.2.
Meaning of this message:
This message conveys传送 the client's certificate chain to the server;
the server will use it when verifying the CertificateVerify
message (when the client authentication is based on signing) or
calculating the premaster secret (for non-ephemeral Diffie-
Hellman). The certificate MUST be appropriate for the negotiated
cipher suite's key exchange algorithm, and any negotiated
extensions.
In particular:
- The certificate type MUST be X.509v3, unless explicitly negotiated
otherwise (e.g., [TLSPGP]).
- The end-entity certificate's public key (and associated
restrictions) has to be compatible with the certificate types
listed in CertificateRequest:
Client Cert. Type Certificate Key Type
rsa_sign RSA public key; the certificate MUST allow the
key to be used for signing with the signature
scheme and hash algorithm that will be
employed in the certificate verify message.
dss_sign DSA public key; the certificate MUST allow the
key to be used for signing with the hash
algorithm that will be employed in the
certificate verify message.
ecdsa_sign ECDSA-capable public key; the certificate MUST
allow the key to be used for signing with the
hash algorithm that will be employed in the
certificate verify message; the public key
MUST use a curve and point format supported by
the server.
rsa_fixed_dh Diffie-Hellman public key; MUST use the same
dss_fixed_dh parameters as server's key.
rsa_fixed_ecdh ECDH-capable public key; MUST use the
ecdsa_fixed_ecdh same curve as the server's key, and MUST use a
point format supported by the server.
- If the certificate_authorities list in the certificate request
message was non-empty, one of the certificates in the certificate
chain SHOULD be issued by one of the listed CAs.
- The certificates MUST be signed using an acceptable hash/
signature algorithm pair, as described in Section 7.4.4. Note
that this relaxes the constraints on certificate-signing
algorithms found in prior versions of TLS.
Note that, as with the server certificate, there are certificates
that use algorithms/algorithm combinations that cannot be currently
used with TLS.
标签：Certificate,certificate,server,rfc4246,Client,key,message,public,MUST 来源： https://www.cnblogs.com/chucklu/p/15671817.html