[PATCH v2] remote-curl: fall back to basic auth if Negotiate fails

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From: Christopher Schenk <christopher@xxxxxxxxxxx>

When the username and password are supplied in a url like this
https://myuser:secret@git.exampe/myrepo.git and the server supports the
negotiate authenticaten method git does not fall back to basic auth and
libcurl hardly tries to authenticate with the negotiate method.

Stop using the Negotiate authentication method after the first failure
because if it fails on the first try it will never succeed.

V1 of this patch somehow did not make it to the mailing list so i will
try to send this patch again

Signed-off-by: Christopher Schenk <christopher@xxxxxxxxxxx>
---
    remote-curl: fall back to basic auth if Negotiate fails
    
    When the username and password are supplied in a url like this
    https://myuser:secret@git.exampe/myrepo.git and the server supports the
    negotiate authenticaten method git does not fall back to basic auth and
    libcurl hardly tries to authenticate with the negotiate method.
    
    Stop using the Negotiate authentication method after the first failure
    because if it fails on the first try it will never succeed.
    
    Signed-off-by: Christopher Schenk christopher@xxxxxxxxxxx

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-849%2Fchschenk%2Fkerberos-basic-fallback-v2
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-849/chschenk/kerberos-basic-fallback-v2
Pull-Request: https://github.com/gitgitgadget/git/pull/849

Range-diff vs v1:

 1:  285a8a568444 ! 1:  7bfc0b431910 remote-curl: fall back to basic auth if Negotiate fails
     @@ Commit message
          Stop using the Negotiate authentication method after the first failure
          because if it fails on the first try it will never succeed.
      
     +    V1 of this patch somehow did not make it to the mailing list so i will
     +    try to send this patch again
     +
          Signed-off-by: Christopher Schenk <christopher@xxxxxxxxxxx>
      
       ## http.c ##


 http.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/http.c b/http.c
index 8b23a546afdf..36f113d46c23 100644
--- a/http.c
+++ b/http.c
@@ -1642,6 +1642,14 @@ static int handle_curl_result(struct slot_results *results)
 		return HTTP_MISSING_TARGET;
 	else if (results->http_code == 401) {
 		if (http_auth.username && http_auth.password) {
+#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
+			if (results->auth_avail & CURLAUTH_GSSNEGOTIATE) {
+				http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
+				http_auth_methods &= results->auth_avail;
+				http_auth_methods_restricted = 1;
+				return HTTP_REAUTH;
+			}
+#endif
 			credential_reject(&http_auth);
 			return HTTP_NOAUTH;
 		} else {

base-commit: 71ca53e8125e36efbda17293c50027d31681a41f
-- 
gitgitgadget



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