curl-curl/docs/cmdline-opts/capath.md
Keno Fischer 40dcf5567c
docs: reflect that delimiter-separated capath is only OpenSSL
curl passes down the capath directly to the backends. OpenSSL will then
delimiter-separate this path internally to support multiple directories
(using its certificate hash scheme). However, the other backends
(wolfSSL, mbedTLS, gnutls) only expect a single directory (and do not
use the hash scheme, preferring to iterate the directory and load all
files). This adjusts the `--capath` documentation to reflect that
multiple paths is an OpenSSL-specific feature. Alternatively, curl could
delimiter-separate these itself, but I'm not sure it's worth it.

Ref https://github.com/JuliaLang/NetworkOptions.jl/issues/41

Closes #17737
2025-06-25 11:23:56 +02:00

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1003 B
Markdown

---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Long: capath
Arg: <dir>
Help: CA directory to verify peer against
Protocols: TLS
Category: tls
Added: 7.9.8
Multi: single
See-also:
- cacert
- dump-ca-embed
- insecure
Example:
- --capath /local/directory $URL
---
# `--capath`
Use the specified certificate directory to verify the peer. If curl is built against
OpenSSL, multiple paths can be provided by separating them with the appropriate platform-specific
separator (e.g. `path1:path2:path3` on Unix-style platforms for `path1;path2;path3` on Windows).
The certificates must be in PEM format, and if curl is built against OpenSSL, the
directory must have been processed using the c_rehash utility supplied with
OpenSSL. Using --capath can allow OpenSSL-powered curl to make SSL-connections
much more efficiently than using --cacert if the --cacert file contains many
CA certificates.
If this option is set, the default capath value is ignored.