Curl is a tool and libcurl is a library for transferring data with URL syntax, supporting FTP, FTPS, HTTP, HTTPS, GOPHER, TFTP, SCP, SFTP, TELNET, DICT, LDAP, LDAPS, FILE, IMAP, SMTP, POP3, RTSP and RTMP. libcurl offers a myriad of powerful features
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Max Faxälv 0a5ea09a91
spnego_gssapi: implement TLS channel bindings for openssl
Channel Bindings are used to tie the session context to a specific TLS
channel. This is to provide additional proof of valid identity,
mitigating authentication relay attacks.

Major web servers have the ability to require (None/Accept/Require)
GSSAPI channel binding, rendering Curl unable to connect to such
websites unless support for channel bindings is implemented.

IIS calls this feature Extended Protection (EPA), which is used in
Enterprise environments using Kerberos for authentication.

This change require krb5 >= 1.19, otherwise channel bindings won't be
forwarded through SPNEGO.

Co-Authored-By: Steffen Kieß <947515+steffen-kiess@users.noreply.github.com>
Closes #13098
2024-08-12 19:16:54 +02:00
.circleci GHA/macos: improve, fix gcc/llvm, add new test matrix 2024-07-19 12:45:18 +02:00
.github autotools: add `--with-windows-unicode` option 2024-08-10 10:02:49 +02:00
CMake cmake: allow `pkg-config` in more envs 2024-08-12 14:57:10 +02:00
LICENSES copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
docs build: tidy up internal macro names for `libcurl.pc` 2024-08-12 14:56:41 +02:00
include tidy-up: OS names 2024-08-04 19:17:45 +02:00
lib spnego_gssapi: implement TLS channel bindings for openssl 2024-08-12 19:16:54 +02:00
m4 tidy-up: delete unused `m4/xc-translit.m4` 2024-08-09 10:45:40 +02:00
packages build: tidy up internal macro names for `libcurl.pc` 2024-08-12 14:56:41 +02:00
plan9 copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
projects tidy-up: OS names 2024-08-04 19:17:45 +02:00
scripts dist: add CI job to detect files missing from distro 2024-08-10 10:02:49 +02:00
src build: tidy up internal macro names for `libcurl.pc` 2024-08-12 14:56:41 +02:00
tests build: tidy up internal macro names for `libcurl.pc` 2024-08-12 14:56:41 +02:00
winbuild tidy-up: OS names 2024-08-04 19:17:45 +02:00
.azure-pipelines.yml GHA/non-native: improve, migrate x86_64 FreeBSD with tests from Cirrus CI 2024-07-29 20:46:40 +02:00
.dcignore copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
.dir-locals.el copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
.git-blame-ignore-revs copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
.gitattributes winbuild: MS-DOS batch tidy-ups 2024-07-02 19:26:15 +02:00
.gitignore CHANGES: rename to CHANGES.md, no longer generated 2024-08-01 13:37:12 +02:00
.mailmap mailmap: dedupe an author showing up twice in shortlog -s 2024-07-30 14:25:30 +02:00
CHANGES.md CHANGES: rename to CHANGES.md, no longer generated 2024-08-01 13:37:12 +02:00
CMakeLists.txt cmake: allow `pkg-config` in more envs 2024-08-12 14:57:10 +02:00
COPYING COPYING: update copyright year 2024-01-08 18:40:06 +01:00
Dockerfile Dockerfile: update debian:bookworm-slim to 39868a6 2024-07-03 08:39:27 +02:00
GIT-INFO.md GIT-INFO.md: remove version requirements 2024-07-08 23:06:05 +02:00
Makefile.am dist: add CI job to detect files missing from distro 2024-08-10 10:02:49 +02:00
Makefile.dist Makefile.mk: drop Windows support 2023-12-16 13:12:22 +00:00
README docs: minor grammar fixes 2022-09-29 10:44:12 +02:00
README.md tidy-up: mostly whitespace nits 2023-08-31 23:02:10 +00:00
RELEASE-NOTES RELEASE-NOTES: synced 2024-08-12 13:48:08 +02:00
REUSE.toml CHANGES: rename to CHANGES.md, no longer generated 2024-08-01 13:37:12 +02:00
SECURITY.md SECURITY-PROCESS.md. call it vulnerability disclosure policy 2023-09-14 17:04:33 +02:00
acinclude.m4 tidy-up: OS names 2024-08-04 19:17:45 +02:00
appveyor.sh CI: enable parallel testing in CI builds 2024-08-03 16:12:44 +02:00
appveyor.yml GHA/non-native: improve, migrate x86_64 FreeBSD with tests from Cirrus CI 2024-07-29 20:46:40 +02:00
buildconf copyright: update all copyright lines and remove year ranges 2023-01-03 09:19:21 +01:00
buildconf.bat buildconf.bat: remove outdated groff/nroff use 2024-03-07 22:38:16 +01:00
configure.ac build: tidy up internal macro names for `libcurl.pc` 2024-08-12 14:56:41 +02:00
curl-config.in build: tidy up internal macro names for `libcurl.pc` 2024-08-12 14:56:41 +02:00
libcurl.def lib: add curl_multi_waitfds 2024-04-09 16:53:40 +02:00
libcurl.pc.in build: tidy up internal macro names for `libcurl.pc` 2024-08-12 14:56:41 +02:00
maketgz dist: drop buildconf 2024-08-06 13:43:20 +02:00
renovate.json GHA: unify http3 workflows into one 2024-06-01 10:57:23 +02:00

README.md

curl logo

Curl is a command-line tool for transferring data specified with URL syntax. Find out how to use curl by reading the curl.1 man page or the MANUAL document. Find out how to install Curl by reading the INSTALL document.

libcurl is the library curl is using to do its job. It is readily available to be used by your software. Read the libcurl.3 man page to learn how.

You can find answers to the most frequent questions we get in the FAQ document.

Study the COPYING file for distribution terms.

Contact

If you have problems, questions, ideas or suggestions, please contact us by posting to a suitable mailing list.

All contributors to the project are listed in the THANKS document.

Commercial support

For commercial support, maybe private and dedicated help with your problems or applications using (lib)curl visit the support page.

Website

Visit the curl website for the latest news and downloads.

Git

To download the latest source from the Git server, do this:

git clone https://github.com/curl/curl.git

(you will get a directory named curl created, filled with the source code)

Security problems

Report suspected security problems via our HackerOne page and not in public.

Notice

Curl contains pieces of source code that is Copyright (c) 1998, 1999 Kungliga Tekniska Högskolan. This notice is included here to comply with the distribution terms.

Backers

Thank you to all our backers! 🙏 Become a backer.

Sponsors

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