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| c | SPDX-License-Identifier | Long | Arg | Help | Protocols | Added | Category | Multi | See-also | Example | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. | curl | curves | <algorithm list> | (EC) TLS key exchange algorithm(s) to request | TLS | 7.73.0 | tls | single |
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--curves
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 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.