| c: Copyright (C) Daniel Stenberg, <[email protected]>, et al. | |
| SPDX-License-Identifier: curl | |
| Long: curves | |
| Arg: <list> | |
| Help: (EC) TLS key exchange algorithms to request | |
| Protocols: TLS | |
| Added: 7.73.0 | |
| Category: tls | |
| Multi: single | |
| See-also: | |
| - ciphers | |
| Example: | |
| - --curves X25519 $URL | |
| # `--curves` | |
| Set 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` and `s_server` utilities. | |
| --curves allows a OpenSSL powered curl to make SSL-connections with exactly | |
| the (EC) curve requested by the client, avoiding nontransparent client/server | |
| negotiations. | |
| If this option is set, the default curves list built into OpenSSL are ignored. | |