http: add support for specifying an SSL cipher list

Teach git about a new option, "http.sslCipherList", which permits one to
specify a list of ciphers to use when negotiating SSL connections.  The
setting can be overwridden by the GIT_SSL_CIPHER_LIST environment
variable.

Signed-off-by: Lars Kellogg-Stedman <lars@redhat.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/Documentation/config.txt b/Documentation/config.txt
index 1a8ddb4..0a01bf9 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -1561,6 +1561,19 @@ http.savecookies::
 	If set, store cookies received during requests to the file specified by
 	http.cookiefile. Has no effect if http.cookiefile is unset.
 
+http.sslCipherList::
+  A list of SSL ciphers to use when negotiating an SSL connection.
+  The available ciphers depend on whether libcurl was built against
+  NSS or OpenSSL and the particular configuration of the crypto
+  library in use.  Internally this sets the 'CURLOPT_SSL_CIPHER_LIST'
+  option; see the libcurl documentation for more details on the format
+  of this list.
++
+Can be overridden by the 'GIT_SSL_CIPHER_LIST' environment variable.
+To force git to use libcurl's default cipher list and ignore any
+explicit http.sslCipherList option, set 'GIT_SSL_CIPHER_LIST' to the
+empty string.
+
 http.sslVerify::
 	Whether to verify the SSL certificate when fetching or pushing
 	over HTTPS. Can be overridden by the 'GIT_SSL_NO_VERIFY' environment