curves.d 819 B

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