A command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET, TFTP, WS and WSS. libcurl offers a myriad of powerful features
Find a file
Matthew John Cheetham 3ea51e7a1f tests: add SPNEGO NTLM blocking tests
test2092 verifies that when only NTLM credentials are available and
CURL_DISABLE_NEGOTIATE_NTLM is active, SPNEGO auth is silently skipped
and the request is sent without an Authorization header.

test2093 verifies that Kerberos credentials still succeed when built
with CURL_DISABLE_NEGOTIATE_NTLM.

Both tests require the negotiate-ntlm-disabled feature, which is
reported by curl --version as "SPNEGO-no-NTLM" when the compile-time
option is active.

Signed-off-by: Matthew John Cheetham <mjcheetham@outlook.com>
2026-04-14 15:12:50 +01:00
.circleci
.github
CMake
docs
include
lib
LICENSES
m4
projects
scripts
src
tests
.clang-tidy.yml
.dir-locals.el
.editorconfig
.git-blame-ignore-revs
.gitattributes
.gitignore
.mailmap
acinclude.m4
appveyor.sh
appveyor.yml
buildconf
CHANGES.md
CMakeLists.txt
configure.ac
COPYING
curl-config.in
Dockerfile
GIT-INFO.md
libcurl.pc.in
Makefile.am
README
README.md
RELEASE-NOTES
renovate.json
REUSE.toml
SECURITY.md

curl logo

curl is a command-line tool for transferring data from or to a server using URLs. It supports these protocols: DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, MQTTS, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET, TFTP, WS and WSS.

Learn how to use curl by reading the man page or everything curl.

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 man page to learn how.

Open Source

curl is Open Source and is distributed under an MIT-like license.

Contact

Contact us on a suitable mailing list or use GitHub issues/ pull requests/ discussions.

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.

Source code

Download the latest source from the Git server:

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

Security problems

Report suspected security problems privately and not in public.

Backers

Thank you to all our backers 🙏 Become a backer.

Sponsors

Support this project by becoming a sponsor.