1 Long: curves 2 Arg: <algorithm list> 3 Help: (EC) TLS key exchange algorithm(s) to request 4 Protocols: TLS 5 Added: 7.73.0 6 Category: tls 7 --- 8 Tells curl to request specific curves to use during SSL session establishment 9 according to RFC 8422, 5.1. Multiple algorithms can be provided by separating 10 them with ":" (e.g. "X25519:P-521"). The parameter is available identically 11 in the "openssl s_client/s_server" utilities. 12 13 --curves allows a OpenSSL powered curl to make SSL-connections with exactly 14 the (EC) curve requested by the client, avoiding intransparent client/server 15 negotiations. 16 17 If this option is set, the default curves list built into openssl will be 18 ignored. 19