This authentication method uses SSL client certificates to perform authentication. It is therefore only available for SSL connections. When using this authentication method, the server will require that the client provide a valid, trusted certificate. No password prompt will be sent to the client. The
cn (Common Name) attribute of the certificate will be compared to the requested database user name, and if they match the login will be allowed. User name mapping can be used to allow
cn to be different from the database user name.
The following configuration options are supported for SSL certificate authentication:
Allows for mapping between system and database user names. See Section 20.2 for details.
pg_hba.conf record specifying certificate authentication, the authentication option
clientcert is assumed to be
verify-full, and it cannot be turned off since a client certificate is necessary for this method. What the
cert method adds to the basic
clientcert certificate validity test is a check that the
cn attribute matches the database user name.