PostgreSQL
21.12. Certificate Authentication
This authentication method uses SSL client certificates to perform authentication. It is therefore only available for SSL connections; see Section 19.9.2 for SSL configuration instructions. 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:
map-
Allows for mapping between system and database user names. See Section 21.2 for details.
It is redundant to use the clientcert option with cert authentication because cert authentication is effectively trust authentication with clientcert=verify-full.
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