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In an effort to increase the readability of the "--help all" output on narrow (80 column) terminals. Co-authored-by: Jay Satiro Closes #13169
29 lines
815 B
Markdown
29 lines
815 B
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Long: curves
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Arg: <list>
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Help: (EC) TLS key exchange algorithms to request
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Protocols: TLS
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Added: 7.73.0
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Category: tls
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Multi: single
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See-also:
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- ciphers
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Example:
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- --curves X25519 $URL
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---
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# `--curves`
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Set specific curves to use during SSL session establishment according to RFC
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8422, 5.1. Multiple algorithms can be provided by separating them with `:`
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(e.g. `X25519:P-521`). The parameter is available identically in the OpenSSL
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`s_client` and `s_server` utilities.
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--curves allows a OpenSSL powered curl to make SSL-connections with exactly
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the (EC) curve requested by the client, avoiding nontransparent client/server
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negotiations.
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If this option is set, the default curves list built into OpenSSL are ignored.
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