| Long: curves |
| Arg: <algorithm list> |
| Help: (EC) TLS key exchange algorithm(s) to request |
| Protocols: TLS |
| Added: 7.73.0 |
| Category: tls |
| Example: --curves X25519 $URL |
| --- |
| Tells curl to request specific curves to use during SSL session establishment |
| according to RFC 8422, 5.1. Multiple algorithms can be provided by separating |
| them with ":" (e.g. "X25519:P-521"). The parameter is available identically |
| in the "openssl s_client/s_server" utilities. |
| |
| --curves allows a OpenSSL powered curl to make SSL-connections with exactly |
| the (EC) curve requested by the client, avoiding intransparent client/server |
| negotiations. |
| |
| If this option is set, the default curves list built into openssl will be |
| ignored. |
