curl-w32/docs/cmdline-opts/proxy-pinnedpubkey.md

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c SPDX-License-Identifier Long Arg Help Protocols Category Added Multi See-also Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. curl proxy-pinnedpubkey <hashes> FILE/HASHES public key to verify proxy with TLS proxy tls 7.59.0 single
pinnedpubkey
proxy
--proxy-pinnedpubkey keyfile $URL
--proxy-pinnedpubkey 'sha256//ce118b51897f4452dc' $URL

--proxy-pinnedpubkey

Tells curl to use the specified public key file (or hashes) to verify the proxy. This can be a path to a file which contains a single public key in PEM or DER format, or any number of base64 encoded sha256 hashes preceded by 'sha256//' and separated by ';'.

When negotiating a TLS or SSL connection, the server sends a certificate indicating its identity. A public key is extracted from this certificate and if it does not exactly match the public key provided to this option, curl aborts the connection before sending or receiving any data.