* Re: [PATCH v2] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-01 19:56 ` [PATCH v2] " brian m. carlson
@ 2015-01-03 11:19 ` Jeff King
2015-01-03 17:45 ` brian m. carlson
2015-01-05 16:02 ` Dan Langille (dalangil)
` (2 subsequent siblings)
3 siblings, 1 reply; 41+ messages in thread
From: Jeff King @ 2015-01-03 11:19 UTC (permalink / raw)
To: brian m. carlson
Cc: git, Dan Langille (dalangil), Jonathan Nieder, Junio C Hamano
On Thu, Jan 01, 2015 at 07:56:27PM +0000, brian m. carlson wrote:
> +void disable_passwordless_auth(struct active_request_slot *slot)
> +{
> +#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
> +#define HTTP_AUTH_PASSWORDLESS (CURLAUTH_GSSNEGOTIATE)
> + curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH,
> + CURLAUTH_ANY & ~HTTP_AUTH_PASSWORDLESS);
> +#endif
> +}
I like that you are trying to put a layer of abstraction around what
"passwordless" means here, but it seems like there are two layers. The
function itself abstracts the idea, and then there is an extra
HTTP_AUTH_PASSWORDLESS macro. Since the concept is already confined to
this function and used only once, it might be more readable to simply
get rid of HTTP_AUTH_PASSWORD.
> @@ -1035,6 +1047,9 @@ static int http_request(const char *url,
> curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
> curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
>
> + if (!http_passwordless_auth)
> + disable_passwordless_auth(slot);
> +
> ret = run_one_slot(slot, &results);
>
> if (options && options->content_type) {
> @@ -1139,6 +1154,7 @@ static int http_request_reauth(const char *url,
> }
>
> credential_fill(&http_auth);
> + http_passwordless_auth = 0;
>
> return http_request(url, result, target, options);
> }
This pattern gets repeated in several places. Now that
http_passwordless_auth is a global, can we handle it automatically for
the callers, as below (which, aside from compiling, is completely
untested by me)?
Note that this is in a slightly different boat than credential_fill.
Ideally we would also handle picking up credentials on behalf of the
callers of get_curl_handle/handle_curl_result. But that may involve
significant work and/or prompting the user, which we _must_ avoid if we
do not know if we are going to retry the request (and only the caller
knows that for sure). However, in the case of http_passwordless_auth, we
are just setting a flag, so it's OK to do it preemptively.
diff --git a/http.c b/http.c
index 040f362..2bbcdf1 100644
--- a/http.c
+++ b/http.c
@@ -62,6 +62,8 @@ static const char *user_agent;
static struct credential cert_auth = CREDENTIAL_INIT;
static int ssl_cert_password_required;
+/* Should we allow non-password-based authentication (e.g. GSSAPI)? */
+static int http_passwordless_auth = 1;
static struct curl_slist *pragma_header;
static struct curl_slist *no_pragma_header;
@@ -318,7 +320,12 @@ static CURL *get_curl_handle(void)
curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
#endif
#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
- curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
+ {
+ int flags = CURLAUTH_ANY;
+ if (!http_passwordless_auth)
+ flags &= ~CURLAUTH_GSSNEGOTIATE;
+ curl_easy_setopt(result, CURLOPT_HTTPAUTH, flags);
+ }
#endif
if (http_proactive_auth)
@@ -870,6 +877,7 @@ int handle_curl_result(struct slot_results *results)
credential_reject(&http_auth);
return HTTP_NOAUTH;
} else {
+ http_passwordless_auth = 0;
return HTTP_REAUTH;
}
} else {
Note that you could probably drop http_passwordless_auth completely, and
just keep a:
static int http_auth_methods = CURLAUTH_ANY;
and then drop CURLAUTH_GSSNEGOTIATE from it instead of setting the
passwordless_auth flag to 0 (again, it happens in one place, so I don't
know that it needs an extra layer of abstraction).
-Peff
^ permalink raw reply related [flat|nested] 41+ messages in thread* Re: [PATCH v2] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-03 11:19 ` Jeff King
@ 2015-01-03 17:45 ` brian m. carlson
2015-01-03 20:14 ` Jeff King
0 siblings, 1 reply; 41+ messages in thread
From: brian m. carlson @ 2015-01-03 17:45 UTC (permalink / raw)
To: Jeff King; +Cc: git, Dan Langille (dalangil), Jonathan Nieder, Junio C Hamano
[-- Attachment #1: Type: text/plain, Size: 2985 bytes --]
On Sat, Jan 03, 2015 at 06:19:23AM -0500, Jeff King wrote:
>This pattern gets repeated in several places. Now that
>http_passwordless_auth is a global, can we handle it automatically for
>the callers, as below (which, aside from compiling, is completely
>untested by me)?
This looks good (although I haven't tested it).
>Note that this is in a slightly different boat than credential_fill.
>Ideally we would also handle picking up credentials on behalf of the
>callers of get_curl_handle/handle_curl_result. But that may involve
>significant work and/or prompting the user, which we _must_ avoid if we
>do not know if we are going to retry the request (and only the caller
>knows that for sure). However, in the case of http_passwordless_auth, we
>are just setting a flag, so it's OK to do it preemptively.
Right. We already prompt the user for a username and password in that
case, so we already have the credentials that we need.
>diff --git a/http.c b/http.c
>index 040f362..2bbcdf1 100644
>--- a/http.c
>+++ b/http.c
>@@ -62,6 +62,8 @@ static const char *user_agent;
>
> static struct credential cert_auth = CREDENTIAL_INIT;
> static int ssl_cert_password_required;
>+/* Should we allow non-password-based authentication (e.g. GSSAPI)? */
>+static int http_passwordless_auth = 1;
>
> static struct curl_slist *pragma_header;
> static struct curl_slist *no_pragma_header;
>@@ -318,7 +320,12 @@ static CURL *get_curl_handle(void)
> curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
> #endif
> #ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
>- curl_easy_setopt(result, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
>+ {
>+ int flags = CURLAUTH_ANY;
I think this needs to be unsigned long or it can cause undefined
behavior, since libcurl uses unsigned long in the flags. I'll fix that
up when I reroll. I'll need your sign-off since it will essentially be
your work.
>+ if (!http_passwordless_auth)
>+ flags &= ~CURLAUTH_GSSNEGOTIATE;
>+ curl_easy_setopt(result, CURLOPT_HTTPAUTH, flags);
>+ }
> #endif
>
> if (http_proactive_auth)
>@@ -870,6 +877,7 @@ int handle_curl_result(struct slot_results *results)
> credential_reject(&http_auth);
> return HTTP_NOAUTH;
> } else {
>+ http_passwordless_auth = 0;
> return HTTP_REAUTH;
> }
> } else {
>
>
>Note that you could probably drop http_passwordless_auth completely, and
>just keep a:
>
> static int http_auth_methods = CURLAUTH_ANY;
>
>and then drop CURLAUTH_GSSNEGOTIATE from it instead of setting the
>passwordless_auth flag to 0 (again, it happens in one place, so I don't
>know that it needs an extra layer of abstraction).
This does seem to handle both cases well. It also has the pleasant
side effect of being static.
--
brian m. carlson / brian with sandals: Houston, Texas, US
+1 832 623 2791 | http://www.crustytoothpaste.net/~bmc | My opinion only
OpenPGP: RSA v4 4096b: 88AC E9B2 9196 305B A994 7552 F1BA 225C 0223 B187
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
^ permalink raw reply [flat|nested] 41+ messages in thread* Re: [PATCH v2] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-03 17:45 ` brian m. carlson
@ 2015-01-03 20:14 ` Jeff King
0 siblings, 0 replies; 41+ messages in thread
From: Jeff King @ 2015-01-03 20:14 UTC (permalink / raw)
To: git, Dan Langille (dalangil), Jonathan Nieder, Junio C Hamano
On Sat, Jan 03, 2015 at 05:45:09PM +0000, brian m. carlson wrote:
> >+ {
> >+ int flags = CURLAUTH_ANY;
>
> I think this needs to be unsigned long or it can cause undefined behavior,
> since libcurl uses unsigned long in the flags. I'll fix that up when I
> reroll. I'll need your sign-off since it will essentially be your work.
I think curl typically uses signed "long" for flags, but certainly
check the docs to be sure.
I was thinking it would be integer-promoted in this case, but I'm not
sure that works always (certainly it does not if CURLAUTH_ANY needs high
bits, but depending on how curl_easy_setopt is implemented, it may also
be implicitly cast as a pointer or something).
And certainly you can have my signoff:
Signed-off-by: Jeff King <peff@peff.net>
-Peff
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v2] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-01 19:56 ` [PATCH v2] " brian m. carlson
2015-01-03 11:19 ` Jeff King
@ 2015-01-05 16:02 ` Dan Langille (dalangil)
2015-01-05 21:23 ` Dan Langille (dalangil)
2015-01-08 0:29 ` [PATCH v3] " brian m. carlson
3 siblings, 0 replies; 41+ messages in thread
From: Dan Langille (dalangil) @ 2015-01-05 16:02 UTC (permalink / raw)
To: brian m. carlson
Cc: git@vger.kernel.org, Jeff King, Jonathan Nieder, Junio C Hamano
I’ve found the latest patch. Trying this now. Thanks.
—
Dan Langille
Infrastructure & Operations
Talos Group
Sourcefire, Inc.
> On Jan 1, 2015, at 2:56 PM, brian m. carlson <sandals@crustytoothpaste.net> wrote:
>
> Apache servers using mod_auth_kerb can be configured to allow the user
> to authenticate either using Negotiate (using the Kerberos ticket) or
> Basic authentication (using the Kerberos password). Often, one will
> want to use Negotiate authentication if it is available, but fall back
> to Basic authentication if the ticket is missing or expired.
>
> However, libcurl will try very hard to use something other than Basic
> auth, even over HTTPS. If Basic and something else are offered, libcurl
> will never attempt to use Basic, even if the other option fails.
> Teach the HTTP client code to stop trying authentication mechanisms that
> don't use a password (currently Negotiate) after the first failure,
> since if they failed the first time, they will never succeed.
>
> Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
> ---
> http.c | 16 ++++++++++++++++
> http.h | 3 +++
> remote-curl.c | 11 ++++++++++-
> 3 files changed, 29 insertions(+), 1 deletion(-)
>
> diff --git a/http.c b/http.c
> index 040f362..815194d 100644
> --- a/http.c
> +++ b/http.c
> @@ -62,6 +62,8 @@ static const char *user_agent;
>
> static struct credential cert_auth = CREDENTIAL_INIT;
> static int ssl_cert_password_required;
> +/* Should we allow non-password-based authentication (e.g. GSSAPI)? */
> +int http_passwordless_auth = 1;
>
> static struct curl_slist *pragma_header;
> static struct curl_slist *no_pragma_header;
> @@ -986,6 +988,16 @@ static void extract_content_type(struct strbuf *raw, struct strbuf *type,
> strbuf_addstr(charset, "ISO-8859-1");
> }
>
> +void disable_passwordless_auth(struct active_request_slot *slot)
> +{
> +#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
> +#define HTTP_AUTH_PASSWORDLESS (CURLAUTH_GSSNEGOTIATE)
> + curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH,
> + CURLAUTH_ANY & ~HTTP_AUTH_PASSWORDLESS);
> +#endif
> +}
> +
> +
> /* http_request() targets */
> #define HTTP_REQUEST_STRBUF 0
> #define HTTP_REQUEST_FILE 1
> @@ -1035,6 +1047,9 @@ static int http_request(const char *url,
> curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
> curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
>
> + if (!http_passwordless_auth)
> + disable_passwordless_auth(slot);
> +
> ret = run_one_slot(slot, &results);
>
> if (options && options->content_type) {
> @@ -1139,6 +1154,7 @@ static int http_request_reauth(const char *url,
> }
>
> credential_fill(&http_auth);
> + http_passwordless_auth = 0;
>
> return http_request(url, result, target, options);
> }
> diff --git a/http.h b/http.h
> index 473179b..71943d3 100644
> --- a/http.h
> +++ b/http.h
> @@ -98,6 +98,8 @@ extern int handle_curl_result(struct slot_results *results);
> int run_one_slot(struct active_request_slot *slot,
> struct slot_results *results);
>
> +void disable_passwordless_auth(struct active_request_slot *slot);
> +
> #ifdef USE_CURL_MULTI
> extern void fill_active_slots(void);
> extern void add_fill_function(void *data, int (*fill)(void *));
> @@ -112,6 +114,7 @@ extern int active_requests;
> extern int http_is_verbose;
> extern size_t http_post_buffer;
> extern struct credential http_auth;
> +extern int http_passwordless_auth;
>
> extern char curl_errorstr[CURL_ERROR_SIZE];
>
> diff --git a/remote-curl.c b/remote-curl.c
> index dd63bc2..4ca5447 100644
> --- a/remote-curl.c
> +++ b/remote-curl.c
> @@ -467,6 +467,9 @@ static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
> curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
> curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
>
> + if (!http_passwordless_auth)
> + disable_passwordless_auth(slot);
> +
> err = run_slot(slot, results);
>
> curl_slist_free_all(headers);
> @@ -510,8 +513,10 @@ static int post_rpc(struct rpc_state *rpc)
>
> do {
> err = probe_rpc(rpc, &results);
> - if (err == HTTP_REAUTH)
> + if (err == HTTP_REAUTH) {
> credential_fill(&http_auth);
> + http_passwordless_auth = 0;
> + }
> } while (err == HTTP_REAUTH);
> if (err != HTTP_OK)
> return -1;
> @@ -533,6 +538,9 @@ retry:
> curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
> curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
>
> + if (!http_passwordless_auth)
> + disable_passwordless_auth(slot);
> +
> if (large_request) {
> /* The request body is large and the size cannot be predicted.
> * We must use chunked encoding to send it.
> @@ -617,6 +625,7 @@ retry:
> err = run_slot(slot, NULL);
> if (err == HTTP_REAUTH && !large_request) {
> credential_fill(&http_auth);
> + http_passwordless_auth = 0;
> goto retry;
> }
> if (err != HTTP_OK)
> --
> 2.2.1.209.g41e5f3a
>
^ permalink raw reply [flat|nested] 41+ messages in thread* Re: [PATCH v2] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-01 19:56 ` [PATCH v2] " brian m. carlson
2015-01-03 11:19 ` Jeff King
2015-01-05 16:02 ` Dan Langille (dalangil)
@ 2015-01-05 21:23 ` Dan Langille (dalangil)
2015-01-05 23:53 ` brian m. carlson
2015-01-08 0:29 ` [PATCH v3] " brian m. carlson
3 siblings, 1 reply; 41+ messages in thread
From: Dan Langille (dalangil) @ 2015-01-05 21:23 UTC (permalink / raw)
To: brian m. carlson
Cc: git@vger.kernel.org, Jeff King, Jonathan Nieder, Junio C Hamano
I have tried both patches. Neither succeeds here. I patched git version 2.2.1 but I don’t think that affects this.
Before I flood the list with debug runs, I wanted to make sure I was testing with an appropriate configuration:
<Location /git>
SSLOptions +StdenvVars
Options +ExecCGI +FollowSymLinks +SymLinksIfOwnerMatch
# By default, allow access to anyone.
Order allow,deny
Allow from All
# Enable Kerberos authentication using mod_auth_kerb.
AuthType Kerberos
AuthName “us.example.org"
KrbAuthRealms us.example.org
# I have tried both with and without the following line:
KrbServiceName HTTP/us.example.org
Krb5Keytab /usr/local/etc/apache22/repo-test.keytab
KrbMethodNegotiate on
KrbSaveCredentials on
KrbVerifyKDC on
KrbServiceName Any
# I have tried with and without this line:
KrbMethodk5Passwd on
Require valid-user
</Location>
With a valid ticket, the above works for a git clone.
—
Dan Langille
Infrastructure & Operations
Talos Group
Sourcefire, Inc.
> On Jan 1, 2015, at 2:56 PM, brian m. carlson <sandals@crustytoothpaste.net> wrote:
>
> Apache servers using mod_auth_kerb can be configured to allow the user
> to authenticate either using Negotiate (using the Kerberos ticket) or
> Basic authentication (using the Kerberos password). Often, one will
> want to use Negotiate authentication if it is available, but fall back
> to Basic authentication if the ticket is missing or expired.
>
> However, libcurl will try very hard to use something other than Basic
> auth, even over HTTPS. If Basic and something else are offered, libcurl
> will never attempt to use Basic, even if the other option fails.
> Teach the HTTP client code to stop trying authentication mechanisms that
> don't use a password (currently Negotiate) after the first failure,
> since if they failed the first time, they will never succeed.
>
> Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
> ---
> http.c | 16 ++++++++++++++++
> http.h | 3 +++
> remote-curl.c | 11 ++++++++++-
> 3 files changed, 29 insertions(+), 1 deletion(-)
>
> diff --git a/http.c b/http.c
> index 040f362..815194d 100644
> --- a/http.c
> +++ b/http.c
> @@ -62,6 +62,8 @@ static const char *user_agent;
>
> static struct credential cert_auth = CREDENTIAL_INIT;
> static int ssl_cert_password_required;
> +/* Should we allow non-password-based authentication (e.g. GSSAPI)? */
> +int http_passwordless_auth = 1;
>
> static struct curl_slist *pragma_header;
> static struct curl_slist *no_pragma_header;
> @@ -986,6 +988,16 @@ static void extract_content_type(struct strbuf *raw, struct strbuf *type,
> strbuf_addstr(charset, "ISO-8859-1");
> }
>
> +void disable_passwordless_auth(struct active_request_slot *slot)
> +{
> +#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
> +#define HTTP_AUTH_PASSWORDLESS (CURLAUTH_GSSNEGOTIATE)
> + curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH,
> + CURLAUTH_ANY & ~HTTP_AUTH_PASSWORDLESS);
> +#endif
> +}
> +
> +
> /* http_request() targets */
> #define HTTP_REQUEST_STRBUF 0
> #define HTTP_REQUEST_FILE 1
> @@ -1035,6 +1047,9 @@ static int http_request(const char *url,
> curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
> curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
>
> + if (!http_passwordless_auth)
> + disable_passwordless_auth(slot);
> +
> ret = run_one_slot(slot, &results);
>
> if (options && options->content_type) {
> @@ -1139,6 +1154,7 @@ static int http_request_reauth(const char *url,
> }
>
> credential_fill(&http_auth);
> + http_passwordless_auth = 0;
>
> return http_request(url, result, target, options);
> }
> diff --git a/http.h b/http.h
> index 473179b..71943d3 100644
> --- a/http.h
> +++ b/http.h
> @@ -98,6 +98,8 @@ extern int handle_curl_result(struct slot_results *results);
> int run_one_slot(struct active_request_slot *slot,
> struct slot_results *results);
>
> +void disable_passwordless_auth(struct active_request_slot *slot);
> +
> #ifdef USE_CURL_MULTI
> extern void fill_active_slots(void);
> extern void add_fill_function(void *data, int (*fill)(void *));
> @@ -112,6 +114,7 @@ extern int active_requests;
> extern int http_is_verbose;
> extern size_t http_post_buffer;
> extern struct credential http_auth;
> +extern int http_passwordless_auth;
>
> extern char curl_errorstr[CURL_ERROR_SIZE];
>
> diff --git a/remote-curl.c b/remote-curl.c
> index dd63bc2..4ca5447 100644
> --- a/remote-curl.c
> +++ b/remote-curl.c
> @@ -467,6 +467,9 @@ static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
> curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
> curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
>
> + if (!http_passwordless_auth)
> + disable_passwordless_auth(slot);
> +
> err = run_slot(slot, results);
>
> curl_slist_free_all(headers);
> @@ -510,8 +513,10 @@ static int post_rpc(struct rpc_state *rpc)
>
> do {
> err = probe_rpc(rpc, &results);
> - if (err == HTTP_REAUTH)
> + if (err == HTTP_REAUTH) {
> credential_fill(&http_auth);
> + http_passwordless_auth = 0;
> + }
> } while (err == HTTP_REAUTH);
> if (err != HTTP_OK)
> return -1;
> @@ -533,6 +538,9 @@ retry:
> curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
> curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
>
> + if (!http_passwordless_auth)
> + disable_passwordless_auth(slot);
> +
> if (large_request) {
> /* The request body is large and the size cannot be predicted.
> * We must use chunked encoding to send it.
> @@ -617,6 +625,7 @@ retry:
> err = run_slot(slot, NULL);
> if (err == HTTP_REAUTH && !large_request) {
> credential_fill(&http_auth);
> + http_passwordless_auth = 0;
> goto retry;
> }
> if (err != HTTP_OK)
> --
> 2.2.1.209.g41e5f3a
>
^ permalink raw reply [flat|nested] 41+ messages in thread* Re: [PATCH v2] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-05 21:23 ` Dan Langille (dalangil)
@ 2015-01-05 23:53 ` brian m. carlson
2015-01-06 15:31 ` Dan Langille (dalangil)
0 siblings, 1 reply; 41+ messages in thread
From: brian m. carlson @ 2015-01-05 23:53 UTC (permalink / raw)
To: Dan Langille (dalangil)
Cc: git@vger.kernel.org, Jeff King, Jonathan Nieder, Junio C Hamano
[-- Attachment #1: Type: text/plain, Size: 1982 bytes --]
On Mon, Jan 05, 2015 at 09:23:32PM +0000, Dan Langille (dalangil) wrote:
>I have tried both patches. Neither succeeds here. I patched git
>version 2.2.1 but I don’t think that affects this.
You are patching the client side, correct? That's the side that needs
patching here.
Just so the list knows, I will be sending a reroll to the existing
patch, but the patches I've posted do indeed work in my testing.
>Before I flood the list with debug runs, I wanted to make sure I was
>testing with an appropriate configuration:
>
><Location /git>
> SSLOptions +StdenvVars
> Options +ExecCGI +FollowSymLinks +SymLinksIfOwnerMatch
>
> # By default, allow access to anyone.
> Order allow,deny
> Allow from All
>
> # Enable Kerberos authentication using mod_auth_kerb.
> AuthType Kerberos
> AuthName “us.example.org"
> KrbAuthRealms us.example.org
> # I have tried both with and without the following line:
> KrbServiceName HTTP/us.example.org
> Krb5Keytab /usr/local/etc/apache22/repo-test.keytab
> KrbMethodNegotiate on
> KrbSaveCredentials on
> KrbVerifyKDC on
> KrbServiceName Any
> # I have tried with and without this line:
> KrbMethodk5Passwd on
> Require valid-user
></Location>
I'm not sure why it's not working for you. Here's a snippet from my
config:
SetEnv GIT_HTTP_EXPORT_ALL 1
SetEnv REMOTE_USER $REDIRECT_REMOTE_USER
AuthType Kerberos
AuthName "Kerberos Login"
KrbMethodNegotiate on
KrbMethodK5Passwd off
KrbAuthRealms CRUSTYTOOTHPASTE.NET
Krb5Keytab /etc/krb5.apache.keytab
When I was testing, I set KrbMethodK5Passwd to on and it did in fact
work. I'm using Debian's Apache 2.4.10-9 with mod_auth_kerb 5.4-2.2.
--
brian m. carlson / brian with sandals: Houston, Texas, US
+1 832 623 2791 | http://www.crustytoothpaste.net/~bmc | My opinion only
OpenPGP: RSA v4 4096b: 88AC E9B2 9196 305B A994 7552 F1BA 225C 0223 B187
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v2] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-05 23:53 ` brian m. carlson
@ 2015-01-06 15:31 ` Dan Langille (dalangil)
2015-01-06 15:41 ` Dan Langille (dalangil)
2015-01-06 16:07 ` Dan Langille (dalangil)
0 siblings, 2 replies; 41+ messages in thread
From: Dan Langille (dalangil) @ 2015-01-06 15:31 UTC (permalink / raw)
To: brian m. carlson
Cc: git@vger.kernel.org, Jeff King, Jonathan Nieder, Junio C Hamano
On Jan 5, 2015, at 6:53 PM, brian m. carlson <sandals@crustytoothpaste.net> wrote:
>
> On Mon, Jan 05, 2015 at 09:23:32PM +0000, Dan Langille (dalangil) wrote:
>> I have tried both patches. Neither succeeds here. I patched git version 2.2.1 but I don’t think that affects this.
>
> You are patching the client side, correct? That's the side that needs patching here.
Yes, I am.
> Just so the list knows, I will be sending a reroll to the existing patch, but the patches I've posted do indeed work in my testing.
I appreciate the patches. I blame something here.
The patches don’t t apply cleanly to git-2.2.1 or to the latest git source I just cloned. I had to copy/paste some two chunks in http.c and everything in remote-curl.c.
Looking at the source, the place to patch is there, just on a different line number.
[dvl@porter93 /usr/ports/devel/git/work/git-2.2.1]$ sudo patch < ~dvl/patch2.txt
Hmm... Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff --git a/http.c b/http.c
|index 040f362..815194d 100644
|--- a/http.c
|+++ b/http.c
--------------------------
Patching file http.c using Plan A...
Hunk #1 succeeded at 62.
Hunk #2 succeeded at 988 with fuzz 2.
Hunk #3 failed at 1047.
Hunk #4 failed at 1154.
2 out of 4 hunks failed--saving rejects to http.c.rej
Hmm... The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff --git a/http.h b/http.h
|index 473179b..71943d3 100644
|--- a/http.h
|+++ b/http.h
--------------------------
Patching file http.h using Plan A...
Hunk #1 succeeded at 98 with fuzz 2.
Hunk #2 succeeded at 114.
Hmm... The next patch looks like a unified diff to me...
The text leading up to this was:
--------------------------
|diff --git a/remote-curl.c b/remote-curl.c
|index dd63bc2..4ca5447 100644
|--- a/remote-curl.c
|+++ b/remote-curl.c
--------------------------
Patching file remote-curl.c using Plan A...
Hunk #1 failed at 467.
Hunk #2 failed at 513.
Hunk #3 failed at 538.
Hunk #4 failed at 625.
4 out of 4 hunks failed--saving rejects to remote-curl.c.rej
done
>> Before I flood the list with debug runs, I wanted to make sure I was testing with an appropriate configuration:
>>
>> <Location /git>
>> SSLOptions +StdenvVars
>> Options +ExecCGI +FollowSymLinks +SymLinksIfOwnerMatch
>>
>> # By default, allow access to anyone.
>> Order allow,deny
>> Allow from All
>>
>> # Enable Kerberos authentication using mod_auth_kerb.
>> AuthType Kerberos
>> AuthName “us.example.org"
>> KrbAuthRealms us.example.org
>> # I have tried both with and without the following line:
>> KrbServiceName HTTP/us.example.org
>> Krb5Keytab /usr/local/etc/apache22/repo-test.keytab
>> KrbMethodNegotiate on
>> KrbSaveCredentials on
>> KrbVerifyKDC on
>> KrbServiceName Any
>> # I have tried with and without this line:
>> KrbMethodk5Passwd on
>> Require valid-user
>> </Location>
>
> I'm not sure why it's not working for you. Here's a snippet from my config:
>
> SetEnv GIT_HTTP_EXPORT_ALL 1
> SetEnv REMOTE_USER $REDIRECT_REMOTE_USER
> AuthType Kerberos
> AuthName "Kerberos Login"
> KrbMethodNegotiate on
> KrbMethodK5Passwd off
> KrbAuthRealms CRUSTYTOOTHPASTE.NET
> Krb5Keytab /etc/krb5.apache.keytab
>
> When I was testing, I set KrbMethodK5Passwd to on and it did in fact work. I'm using Debian's Apache 2.4.10-9 with mod_auth_kerb 5.4-2.2.
That didn’t seem to help, but perhaps the patching is the issue.
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v2] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-06 15:31 ` Dan Langille (dalangil)
@ 2015-01-06 15:41 ` Dan Langille (dalangil)
2015-01-06 16:07 ` Dan Langille (dalangil)
1 sibling, 0 replies; 41+ messages in thread
From: Dan Langille (dalangil) @ 2015-01-06 15:41 UTC (permalink / raw)
To: brian m. carlson
Cc: git@vger.kernel.org, Jeff King, Jonathan Nieder, Junio C Hamano
> On Jan 6, 2015, at 10:31 AM, Dan Langille (dalangil) <dalangil@cisco.com> wrote:
>
> On Jan 5, 2015, at 6:53 PM, brian m. carlson <sandals@crustytoothpaste.net> wrote:
>>
>> On Mon, Jan 05, 2015 at 09:23:32PM +0000, Dan Langille (dalangil) wrote:
>>> I have tried both patches. Neither succeeds here. I patched git version 2.2.1 but I don’t think that affects this.
>>
>> You are patching the client side, correct? That's the side that needs patching here.
>
> Yes, I am.
>
>> Just so the list knows, I will be sending a reroll to the existing patch, but the patches I've posted do indeed work in my testing.
>
> I appreciate the patches. I blame something here.
>
> The patches don’t t apply cleanly to git-2.2.1 or to the latest git source I just cloned. I had to copy/paste some two chunks in http.c and everything in remote-curl.c.
NOTE: I now realize these problems are caused by tabs being converted to spaces when downloading the patch. I’m going to test again.
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v2] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-06 15:31 ` Dan Langille (dalangil)
2015-01-06 15:41 ` Dan Langille (dalangil)
@ 2015-01-06 16:07 ` Dan Langille (dalangil)
2015-01-08 0:02 ` brian m. carlson
1 sibling, 1 reply; 41+ messages in thread
From: Dan Langille (dalangil) @ 2015-01-06 16:07 UTC (permalink / raw)
To: brian m. carlson
Cc: git@vger.kernel.org, Jeff King, Jonathan Nieder, Junio C Hamano
> On Jan 6, 2015, at 10:31 AM, Dan Langille (dalangil) <dalangil@cisco.com> wrote:
>
> On Jan 5, 2015, at 6:53 PM, brian m. carlson <sandals@crustytoothpaste.net> wrote:
>>
>> On Mon, Jan 05, 2015 at 09:23:32PM +0000, Dan Langille (dalangil) wrote:
>>> I have tried both patches. Neither succeeds here. I patched git version 2.2.1 but I don’t think that affects this.
>>
>> You are patching the client side, correct? That's the side that needs patching here.
>
> Yes, I am.
>
>> Just so the list knows, I will be sending a reroll to the existing patch, but the patches I've posted do indeed work in my testing.
>
> I appreciate the patches. I blame something here.
>
> The patches don’t t apply cleanly to git-2.2.1 or to the latest git source I just cloned. I had to copy/paste some two chunks in http.c and everything in remote-curl.c.
I tried again, with a proper copy of your patch. Cleanly patched versions of git 2.2.1 and from
a recent clone of the repo both give 'Authentication failed’ when doing a clone without a ticket.
I’m sure there’s something here which is at fault.
Here is the client side debugging. Is this what is expected? Tested with a clone of git from this morning.
[dan@porter93 ~/tmp/tmp]$ ~/src/git/git clone https://us.example.org/git/clamav-bytecode-compiler
Cloning into 'clamav-bytecode-compiler'...
warning: templates not found /usr/home/dan/share/git-core/templates
* Couldn't find host us.example.org in the .netrc file; using defaults
* Hostname was NOT found in DNS cache
* Trying 10.0.0.1...
* Connected to us.example.org (10.0.0.1) port 443 (#0)
* successfully set certificate verify locations:
* CAfile: /usr/local/share/certs/ca-root-nss.crt
CApath: none
* SSL connection using TLSv1.0 / DHE-RSA-CAMELLIA256-SHA
* Server certificate:
* subject: REDACTED
* start date: REDACTED
* expire date: REDACTED
* issuer: REDACTED
* SSL certificate verify result: self signed certificate in certificate chain (19), continuing anyway.
> GET /git/clamav-bytecode-compiler/info/refs?service=git-upload-pack HTTP/1.1
User-Agent: git/2.2.1.212.gc5b9256.dirty
Host: us.example.org
Accept: */*
Accept-Encoding: gzip
Pragma: no-cache
< HTTP/1.1 401 Authorization Required
< Date: Tue, 06 Jan 2015 16:02:38 GMT
< Server: Apache
< WWW-Authenticate: Negotiate
< Content-Length: 401
< Content-Type: text/html; charset=iso-8859-1
<
* Connection #0 to host us.example.org left intact
Username for 'https://us.example.org':
Password for 'https://dan@us.example.org':
* Couldn't find host us.example.org in the .netrc file; using defaults
* Connection 0 seems to be dead!
* Closing connection 0
* Hostname was found in DNS cache
* Trying 10.0.0.1...
* Connected to us.example.org (10.0.0.1) port 443 (#1)
* successfully set certificate verify locations:
* CAfile: /usr/local/share/certs/ca-root-nss.crt
CApath: none
* SSL re-using session ID
* SSL connection using TLSv1.0 / DHE-RSA-CAMELLIA256-SHA
* Server certificate:
* subject: REDACTED
* start date: REDACTED
* expire date: REDACTED
* issuer: REDACTED
* SSL certificate verify result: self signed certificate in certificate chain (19), continuing anyway.
> GET /git/clamav-bytecode-compiler/info/refs?service=git-upload-pack HTTP/1.1
User-Agent: git/2.2.1.212.gc5b9256.dirty
Host: us.example.org
Accept: */*
Accept-Encoding: gzip
Pragma: no-cache
< HTTP/1.1 401 Authorization Required
< Date: Tue, 06 Jan 2015 16:02:48 GMT
< Server: Apache
< WWW-Authenticate: Negotiate
< Content-Length: 401
< Content-Type: text/html; charset=iso-8859-1
<
* Connection #1 to host us.example.org left intact
fatal: Authentication failed for 'https://us.example.org/git/clamav-bytecode-compiler/'
[dan@porter93 ~/tmp/tmp]$
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v2] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-06 16:07 ` Dan Langille (dalangil)
@ 2015-01-08 0:02 ` brian m. carlson
0 siblings, 0 replies; 41+ messages in thread
From: brian m. carlson @ 2015-01-08 0:02 UTC (permalink / raw)
To: Dan Langille (dalangil)
Cc: git@vger.kernel.org, Jeff King, Jonathan Nieder, Junio C Hamano
[-- Attachment #1: Type: text/plain, Size: 757 bytes --]
On Tue, Jan 06, 2015 at 04:07:01PM +0000, Dan Langille (dalangil) wrote:
>< HTTP/1.1 401 Authorization Required
>< Date: Tue, 06 Jan 2015 16:02:48 GMT
>< Server: Apache
>< WWW-Authenticate: Negotiate
Your server is set up incorrectly. You should see a Negotiate line and
a Basic line as well. Right now, you only have Negotiate set up, so if
you don't have a ticket, it's going to fail.
I'd recommend making sure that you can access it using a web browser
after running kdestroy. That will ensure that it's working properly.
--
brian m. carlson / brian with sandals: Houston, Texas, US
+1 832 623 2791 | http://www.crustytoothpaste.net/~bmc | My opinion only
OpenPGP: RSA v4 4096b: 88AC E9B2 9196 305B A994 7552 F1BA 225C 0223 B187
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
^ permalink raw reply [flat|nested] 41+ messages in thread
* [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-01 19:56 ` [PATCH v2] " brian m. carlson
` (2 preceding siblings ...)
2015-01-05 21:23 ` Dan Langille (dalangil)
@ 2015-01-08 0:29 ` brian m. carlson
2015-01-20 16:40 ` Dan Langille (dalangil)
3 siblings, 1 reply; 41+ messages in thread
From: brian m. carlson @ 2015-01-08 0:29 UTC (permalink / raw)
To: git; +Cc: Dan Langille (dalangil), Jeff King, Junio C Hamano
Apache servers using mod_auth_kerb can be configured to allow the user
to authenticate either using Negotiate (using the Kerberos ticket) or
Basic authentication (using the Kerberos password). Often, one will
want to use Negotiate authentication if it is available, but fall back
to Basic authentication if the ticket is missing or expired.
However, libcurl will try very hard to use something other than Basic
auth, even over HTTPS. If Basic and something else are offered, libcurl
will never attempt to use Basic, even if the other option fails.
Teach the HTTP client code to stop trying authentication mechanisms that
don't use a password (currently Negotiate) after the first failure,
since if they failed the first time, they will never succeed.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Jeff King <peff@peff.net>
---
Peff's original change was to get_curl_handle; however, we retry the
second time with the same slot and we may not call get_curl_handle
again, so I had to move that change to get_active_slot. This has been
tested pushing with both Negotiate and Basic against an HTTPS server
both when info/refs was protected and when it was not.
http.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/http.c b/http.c
index 040f362..44b130c 100644
--- a/http.c
+++ b/http.c
@@ -62,6 +62,9 @@ static const char *user_agent;
static struct credential cert_auth = CREDENTIAL_INIT;
static int ssl_cert_password_required;
+#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
+static unsigned long http_auth_methods = CURLAUTH_ANY;
+#endif
static struct curl_slist *pragma_header;
static struct curl_slist *no_pragma_header;
@@ -580,6 +583,9 @@ struct active_request_slot *get_active_slot(void)
curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
+#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
+ curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
+#endif
if (http_auth.password)
init_curl_http_auth(slot->curl);
@@ -870,6 +876,9 @@ int handle_curl_result(struct slot_results *results)
credential_reject(&http_auth);
return HTTP_NOAUTH;
} else {
+#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
+ http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
+#endif
return HTTP_REAUTH;
}
} else {
@@ -986,6 +995,7 @@ static void extract_content_type(struct strbuf *raw, struct strbuf *type,
strbuf_addstr(charset, "ISO-8859-1");
}
+
/* http_request() targets */
#define HTTP_REQUEST_STRBUF 0
#define HTTP_REQUEST_FILE 1
--
2.2.1.209.g41e5f3a
^ permalink raw reply related [flat|nested] 41+ messages in thread* Re: [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-08 0:29 ` [PATCH v3] " brian m. carlson
@ 2015-01-20 16:40 ` Dan Langille (dalangil)
2015-01-21 0:22 ` Junio C Hamano
0 siblings, 1 reply; 41+ messages in thread
From: Dan Langille (dalangil) @ 2015-01-20 16:40 UTC (permalink / raw)
To: brian m. carlson; +Cc: git@vger.kernel.org, Jeff King, Junio C Hamano
I did not test this patch. Is that holding up a commit?
—
Dan Langille
Infrastructure & Operations
Talos Group
Sourcefire, Inc.
> On Jan 7, 2015, at 7:29 PM, brian m. carlson <sandals@crustytoothpaste.net> wrote:
>
> Apache servers using mod_auth_kerb can be configured to allow the user
> to authenticate either using Negotiate (using the Kerberos ticket) or
> Basic authentication (using the Kerberos password). Often, one will
> want to use Negotiate authentication if it is available, but fall back
> to Basic authentication if the ticket is missing or expired.
>
> However, libcurl will try very hard to use something other than Basic
> auth, even over HTTPS. If Basic and something else are offered, libcurl
> will never attempt to use Basic, even if the other option fails.
> Teach the HTTP client code to stop trying authentication mechanisms that
> don't use a password (currently Negotiate) after the first failure,
> since if they failed the first time, they will never succeed.
>
> Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
> Signed-off-by: Jeff King <peff@peff.net>
> ---
> Peff's original change was to get_curl_handle; however, we retry the
> second time with the same slot and we may not call get_curl_handle
> again, so I had to move that change to get_active_slot. This has been
> tested pushing with both Negotiate and Basic against an HTTPS server
> both when info/refs was protected and when it was not.
>
> http.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/http.c b/http.c
> index 040f362..44b130c 100644
> --- a/http.c
> +++ b/http.c
> @@ -62,6 +62,9 @@ static const char *user_agent;
>
> static struct credential cert_auth = CREDENTIAL_INIT;
> static int ssl_cert_password_required;
> +#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
> +static unsigned long http_auth_methods = CURLAUTH_ANY;
> +#endif
>
> static struct curl_slist *pragma_header;
> static struct curl_slist *no_pragma_header;
> @@ -580,6 +583,9 @@ struct active_request_slot *get_active_slot(void)
> curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 0);
> curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
> curl_easy_setopt(slot->curl, CURLOPT_FAILONERROR, 1);
> +#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
> + curl_easy_setopt(slot->curl, CURLOPT_HTTPAUTH, http_auth_methods);
> +#endif
> if (http_auth.password)
> init_curl_http_auth(slot->curl);
>
> @@ -870,6 +876,9 @@ int handle_curl_result(struct slot_results *results)
> credential_reject(&http_auth);
> return HTTP_NOAUTH;
> } else {
> +#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
> + http_auth_methods &= ~CURLAUTH_GSSNEGOTIATE;
> +#endif
> return HTTP_REAUTH;
> }
> } else {
> @@ -986,6 +995,7 @@ static void extract_content_type(struct strbuf *raw, struct strbuf *type,
> strbuf_addstr(charset, "ISO-8859-1");
> }
>
> +
> /* http_request() targets */
> #define HTTP_REQUEST_STRBUF 0
> #define HTTP_REQUEST_FILE 1
> --
> 2.2.1.209.g41e5f3a
>
^ permalink raw reply [flat|nested] 41+ messages in thread* Re: [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-20 16:40 ` Dan Langille (dalangil)
@ 2015-01-21 0:22 ` Junio C Hamano
2015-01-22 14:47 ` Dan Langille (dalangil)
2015-02-17 23:05 ` Dan Langille (dalangil)
0 siblings, 2 replies; 41+ messages in thread
From: Junio C Hamano @ 2015-01-21 0:22 UTC (permalink / raw)
To: Dan Langille (dalangil); +Cc: brian m. carlson, git@vger.kernel.org, Jeff King
"Dan Langille (dalangil)" <dalangil@cisco.com> writes:
> I did not test this patch. Is that holding up a commit?
I am hoping that you rebuilt the Git you use with this patch by the
time you wrote the message I am responding to and have been using it
for your daily Git needs ;-)
I believe it is queued on the 'next' branch so that others like you
who need the change can verify the improvements, and others unlike
you who do not need the change can make sure the change does not
cause unintended consequences.
Thanks.
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-21 0:22 ` Junio C Hamano
@ 2015-01-22 14:47 ` Dan Langille (dalangil)
2015-02-17 23:05 ` Dan Langille (dalangil)
1 sibling, 0 replies; 41+ messages in thread
From: Dan Langille (dalangil) @ 2015-01-22 14:47 UTC (permalink / raw)
To: Junio C Hamano; +Cc: brian m. carlson, git@vger.kernel.org, Jeff King
> On Jan 20, 2015, at 7:22 PM, Junio C Hamano <gitster@pobox.com> wrote:
>
> "Dan Langille (dalangil)" <dalangil@cisco.com> writes:
>
>> I did not test this patch. Is that holding up a commit?
>
> I am hoping that you rebuilt the Git you use with this patch by the
> time you wrote the message I am responding to and have been using it
> for your daily Git needs ;-)
Patch v2 has been used in our test environment with success. I got diverted to other projects before I could test Patch v3.
> I believe it is queued on the 'next' branch so that others like you
> who need the change can verify the improvements, and others unlike
> you who do not need the change can make sure the change does not
> cause unintended consequences.
Thank you.
—
Dan Langille
Infrastructure & Operations
Talos Group
Sourcefire, Inc.
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-01-21 0:22 ` Junio C Hamano
2015-01-22 14:47 ` Dan Langille (dalangil)
@ 2015-02-17 23:05 ` Dan Langille (dalangil)
2015-02-17 23:36 ` Junio C Hamano
1 sibling, 1 reply; 41+ messages in thread
From: Dan Langille (dalangil) @ 2015-02-17 23:05 UTC (permalink / raw)
To: Junio C Hamano; +Cc: brian m. carlson, git@vger.kernel.org, Jeff King
> On Jan 20, 2015, at 7:22 PM, Junio C Hamano <gitster@pobox.com> wrote:
>
> "Dan Langille (dalangil)" <dalangil@cisco.com> writes:
>
>> I did not test this patch. Is that holding up a commit?
>
> I am hoping that you rebuilt the Git you use with this patch by the
> time you wrote the message I am responding to and have been using it
> for your daily Git needs ;-)
>
> I believe it is queued on the 'next' branch so that others like you
> who need the change can verify the improvements, and others unlike
> you who do not need the change can make sure the change does not
> cause unintended consequences.
Is this the patch in question?
https://github.com/git/git/commit/4dbe66464b4fd695c5989cc272fa0edd6475037c
I ask because previous versions of the patch acted against http.h as well and my failure with it.
Could I expect that patch work against 2.3.0?
It applies cleanly, compiles, but cores when I try a ‘git clone’. Unmatched 2.3.0 succeeds.
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-02-17 23:05 ` Dan Langille (dalangil)
@ 2015-02-17 23:36 ` Junio C Hamano
2015-02-18 16:17 ` Dan Langille (dalangil)
0 siblings, 1 reply; 41+ messages in thread
From: Junio C Hamano @ 2015-02-17 23:36 UTC (permalink / raw)
To: Dan Langille (dalangil); +Cc: brian m. carlson, git@vger.kernel.org, Jeff King
"Dan Langille (dalangil)" <dalangil@cisco.com> writes:
>> On Jan 20, 2015, at 7:22 PM, Junio C Hamano <gitster@pobox.com> wrote:
>>
>> "Dan Langille (dalangil)" <dalangil@cisco.com> writes:
>>
>>> I did not test this patch. Is that holding up a commit?
>>
>> I am hoping that you rebuilt the Git you use with this patch by the
>> time you wrote the message I am responding to and have been using it
>> for your daily Git needs ;-)
>>
>> I believe it is queued on the 'next' branch so that others like you
>> who need the change can verify the improvements, and others unlike
>> you who do not need the change can make sure the change does not
>> cause unintended consequences.
>
> Is this the patch in question?
>
> https://github.com/git/git/commit/4dbe66464b4fd695c5989cc272fa0edd6475037c
>
> I ask because previous versions of the patch acted against http.h as
> well and my failure with it.
>
> Could I expect that patch work against 2.3.0?
>
> It applies cleanly, compiles, but cores when I try a ‘git clone’.
> Unmatched 2.3.0 succeeds.
It already is in 'master', so please holler if things break with
that version.
Thanks.
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-02-17 23:36 ` Junio C Hamano
@ 2015-02-18 16:17 ` Dan Langille (dalangil)
2015-02-19 20:35 ` brian m. carlson
0 siblings, 1 reply; 41+ messages in thread
From: Dan Langille (dalangil) @ 2015-02-18 16:17 UTC (permalink / raw)
To: Junio C Hamano; +Cc: brian m. carlson, git@vger.kernel.org, Jeff King
On Feb 17, 2015, at 6:36 PM, Junio C Hamano <gitster@pobox.com> wrote:
>
> "Dan Langille (dalangil)" <dalangil@cisco.com> writes:
>
>>> On Jan 20, 2015, at 7:22 PM, Junio C Hamano <gitster@pobox.com> wrote:
>>>
>>> "Dan Langille (dalangil)" <dalangil@cisco.com> writes:
>>>
>>>> I did not test this patch. Is that holding up a commit?
>>>
>>> I am hoping that you rebuilt the Git you use with this patch by the
>>> time you wrote the message I am responding to and have been using it
>>> for your daily Git needs ;-)
>>>
>>> I believe it is queued on the 'next' branch so that others like you
>>> who need the change can verify the improvements, and others unlike
>>> you who do not need the change can make sure the change does not
>>> cause unintended consequences.
>>
>> Is this the patch in question?
>>
>> https://github.com/git/git/commit/4dbe66464b4fd695c5989cc272fa0edd6475037c
>>
>> I ask because previous versions of the patch acted against http.h as
>> well and my failure with it.
>>
>> Could I expect that patch work against 2.3.0?
>>
>> It applies cleanly, compiles, but cores when I try a ‘git clone’.
>> Unmatched 2.3.0 succeeds.
>
> It already is in 'master', so please holler if things break with
> that version.
I just built from ‘master’, on FreeBSD 9.3:
cd ~/src
git clone https://github.com/git/git.git
cd git
gmake
Then tried ~/src/git/git clone https://OUR_REPO
It cores too, and I see: git-remote-https.core
—
Dan Langille
Infrastructure & Operations
Talos Group
Sourcefire, Inc.
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-02-18 16:17 ` Dan Langille (dalangil)
@ 2015-02-19 20:35 ` brian m. carlson
2015-02-24 21:03 ` Dan Langille (dalangil)
0 siblings, 1 reply; 41+ messages in thread
From: brian m. carlson @ 2015-02-19 20:35 UTC (permalink / raw)
To: Dan Langille (dalangil); +Cc: Junio C Hamano, git@vger.kernel.org, Jeff King
[-- Attachment #1: Type: text/plain, Size: 732 bytes --]
On Wed, Feb 18, 2015 at 04:17:46PM +0000, Dan Langille (dalangil) wrote:
> I just built from ‘master’, on FreeBSD 9.3:
>
> cd ~/src
> git clone https://github.com/git/git.git
> cd git
> gmake
>
> Then tried ~/src/git/git clone https://OUR_REPO
>
> It cores too, and I see: git-remote-https.core
Can you compile with debugging symbols and provide a backtrace? I'm not
seeing any such behavior on my end, and I'm not sure whether it's my
patch or something else that might be present in master.
--
brian m. carlson / brian with sandals: Houston, Texas, US
+1 832 623 2791 | http://www.crustytoothpaste.net/~bmc | My opinion only
OpenPGP: RSA v4 4096b: 88AC E9B2 9196 305B A994 7552 F1BA 225C 0223 B187
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-02-19 20:35 ` brian m. carlson
@ 2015-02-24 21:03 ` Dan Langille (dalangil)
2015-02-25 20:59 ` Dan Langille (dalangil)
0 siblings, 1 reply; 41+ messages in thread
From: Dan Langille (dalangil) @ 2015-02-24 21:03 UTC (permalink / raw)
To: brian m. carlson; +Cc: Junio C Hamano, git@vger.kernel.org, Jeff King
> On Feb 19, 2015, at 3:35 PM, brian m. carlson <sandals@crustytoothpaste.net> wrote:
>
> On Wed, Feb 18, 2015 at 04:17:46PM +0000, Dan Langille (dalangil) wrote:
>> I just built from ‘master’, on FreeBSD 9.3:
>>
>> cd ~/src
>> git clone https://github.com/git/git.git
>> cd git
>> gmake
>>
>> Then tried ~/src/git/git clone https://OUR_REPO
>>
>> It cores too, and I see: git-remote-https.core
>
> Can you compile with debugging symbols and provide a backtrace? I'm not
> seeing any such behavior on my end, and I'm not sure whether it's my
> patch or something else that might be present in master.
The problem originally occurred under VMware Fusion and I’m unable to get a backtrace from it.
I suspect memory constraints are a factor. There’s only 5GB RAM available to this VM.
I have tried in another VM and that succeeds. All good there. It has 40GB RAM.
I am going to try this on a third system. At present, we’re just 50/50 on success.
—
Dan Langille
Infrastructure & Operations
Talos Group
Sourcefire, Inc.
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-02-24 21:03 ` Dan Langille (dalangil)
@ 2015-02-25 20:59 ` Dan Langille (dalangil)
2015-03-10 18:05 ` Dan Langille (dalangil)
0 siblings, 1 reply; 41+ messages in thread
From: Dan Langille (dalangil) @ 2015-02-25 20:59 UTC (permalink / raw)
To: brian m. carlson; +Cc: Junio C Hamano, git@vger.kernel.org, Jeff King
> On Feb 24, 2015, at 4:03 PM, Dan Langille (dalangil) <dalangil@cisco.com> wrote:
>
>> On Feb 19, 2015, at 3:35 PM, brian m. carlson <sandals@crustytoothpaste.net> wrote:
>>
>> On Wed, Feb 18, 2015 at 04:17:46PM +0000, Dan Langille (dalangil) wrote:
>>> I just built from ‘master’, on FreeBSD 9.3:
>>>
>>> cd ~/src
>>> git clone https://github.com/git/git.git
>>> cd git
>>> gmake
>>>
>>> Then tried ~/src/git/git clone https://OUR_REPO
>>>
>>> It cores too, and I see: git-remote-https.core
>>
>> Can you compile with debugging symbols and provide a backtrace? I'm not
>> seeing any such behavior on my end, and I'm not sure whether it's my
>> patch or something else that might be present in master.
>
> The problem originally occurred under VMware Fusion and I’m unable to get a backtrace from it.
> I suspect memory constraints are a factor. There’s only 5GB RAM available to this VM.
>
> I have tried in another VM and that succeeds. All good there. It has 40GB RAM.
>
> I am going to try this on a third system. At present, we’re just 50/50 on success.
We have made progress I think.
With stock git:
tl;dr: 1 - with a ticket, you get prompted, but hitting ENTER succeeds.
2 - without a ticket, nothing works
With patched git:
tl;dr: 1 - with a ticket, entering credentials, SUCCEEDS; just hit enter, failure
2 - without a ticket, entering credentials, SUCCEEDS
Here is my test, with a valid kerberos ticket:
$ git clone https://git.example.com/git/clamav-bytecode-compiler
Cloning into 'clamav-bytecode-compiler'...
Username for 'https://git.example.com':
Password for 'https://git.example.com':
^Cmote: Counting objects: 224546
$
^ permalink raw reply [flat|nested] 41+ messages in thread* Re: [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-02-25 20:59 ` Dan Langille (dalangil)
@ 2015-03-10 18:05 ` Dan Langille (dalangil)
2015-03-10 22:29 ` brian m. carlson
0 siblings, 1 reply; 41+ messages in thread
From: Dan Langille (dalangil) @ 2015-03-10 18:05 UTC (permalink / raw)
To: brian m. carlson; +Cc: Junio C Hamano, git@vger.kernel.org, Jeff King
> On Feb 25, 2015, at 3:59 PM, Dan Langille (dalangil) <dalangil@cisco.com> wrote:
>
>> On Feb 24, 2015, at 4:03 PM, Dan Langille (dalangil) <dalangil@cisco.com> wrote:
>>
>>> On Feb 19, 2015, at 3:35 PM, brian m. carlson <sandals@crustytoothpaste.net> wrote:
>>>
>>> On Wed, Feb 18, 2015 at 04:17:46PM +0000, Dan Langille (dalangil) wrote:
>>>> I just built from ‘master’, on FreeBSD 9.3:
>>>>
>>>> cd ~/src
>>>> git clone https://github.com/git/git.git
>>>> cd git
>>>> gmake
>>>>
>>>> Then tried ~/src/git/git clone https://OUR_REPO
>>>>
>>>> It cores too, and I see: git-remote-https.core
>>>
>>> Can you compile with debugging symbols and provide a backtrace? I'm not
>>> seeing any such behavior on my end, and I'm not sure whether it's my
>>> patch or something else that might be present in master.
>>
>> The problem originally occurred under VMware Fusion and I’m unable to get a backtrace from it.
>> I suspect memory constraints are a factor. There’s only 5GB RAM available to this VM.
>>
>> I have tried in another VM and that succeeds. All good there. It has 40GB RAM.
>>
>> I am going to try this on a third system. At present, we’re just 50/50 on success.
>
>
> We have made progress I think.
>
> With stock git:
>
> tl;dr: 1 - with a ticket, you get prompted, but hitting ENTER succeeds.
> 2 - without a ticket, nothing works
>
>
> With patched git:
>
> tl;dr: 1 - with a ticket, entering credentials, SUCCEEDS; just hit enter, failure
If I have a valid ticket, why am I being prompted for credentials?
It appears patched git always wants credentials entered and ignores the valid ticket.
> 2 - without a ticket, entering credentials, SUCCEEDS
>
> Here is my test, with a valid kerberos ticket:
>
> $ git clone https://git.example.com/git/clamav-bytecode-compiler
> Cloning into 'clamav-bytecode-compiler'...
> Username for 'https://git.example.com':
> Password for 'https://git.example.com':
> ^Cmote: Counting objects: 224546
> $
>
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-03-10 18:05 ` Dan Langille (dalangil)
@ 2015-03-10 22:29 ` brian m. carlson
2015-03-11 19:33 ` Dan Langille (dalangil)
0 siblings, 1 reply; 41+ messages in thread
From: brian m. carlson @ 2015-03-10 22:29 UTC (permalink / raw)
To: Dan Langille (dalangil); +Cc: Junio C Hamano, git@vger.kernel.org, Jeff King
[-- Attachment #1: Type: text/plain, Size: 1459 bytes --]
On Tue, Mar 10, 2015 at 06:05:46PM +0000, Dan Langille (dalangil) wrote:
>> We have made progress I think.
>>
>> With stock git:
>>
>> tl;dr: 1 - with a ticket, you get prompted, but hitting ENTER succeeds.
>> 2 - without a ticket, nothing works
>>
>>
>> With patched git:
>>
>> tl;dr: 1 - with a ticket, entering credentials, SUCCEEDS; just hit enter, failure
>
>If I have a valid ticket, why am I being prompted for credentials?
libcurl won't even attempt authentication if you don't have a username
specified. I know that the web server should be able to figure it out
from your credentials, so it shouldn't matter what username you provide.
This is an unfortuate quirk of libcurl.
Also, are you using 2.3.0, or one of the earlier patched versions? That
might affect how it works.
>It appears patched git always wants credentials entered and ignores the
>valid ticket.
So what I think is happening is that you didn't specify a username, but
git got a 401, so it prompted. Now it actually attempts to use the
password you provided, whereas before it did not.
Does it work with a ticket if you specify a username, as in the
following URL?
https://bmc@git.crustytoothpaste.net/git/bmc/homedir.git
--
brian m. carlson / brian with sandals: Houston, Texas, US
+1 832 623 2791 | http://www.crustytoothpaste.net/~bmc | My opinion only
OpenPGP: RSA v4 4096b: 88AC E9B2 9196 305B A994 7552 F1BA 225C 0223 B187
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-03-10 22:29 ` brian m. carlson
@ 2015-03-11 19:33 ` Dan Langille (dalangil)
2015-03-11 21:59 ` brian m. carlson
0 siblings, 1 reply; 41+ messages in thread
From: Dan Langille (dalangil) @ 2015-03-11 19:33 UTC (permalink / raw)
To: brian m. carlson; +Cc: Junio C Hamano, git@vger.kernel.org, Jeff King
> On Mar 10, 2015, at 6:29 PM, brian m. carlson <sandals@crustytoothpaste.net> wrote:
>
> On Tue, Mar 10, 2015 at 06:05:46PM +0000, Dan Langille (dalangil) wrote:
>>> We have made progress I think.
>>>
>>> With stock git:
>>>
>>> tl;dr: 1 - with a ticket, you get prompted, but hitting ENTER succeeds.
>>> 2 - without a ticket, nothing works
>>>
>>>
>>> With patched git:
>>>
>>> tl;dr: 1 - with a ticket, entering credentials, SUCCEEDS; just hit enter, failure
>>
>> If I have a valid ticket, why am I being prompted for credentials?
>
> libcurl won't even attempt authentication if you don't have a username
> specified. I know that the web server should be able to figure it out
> from your credentials, so it shouldn't matter what username you provide.
> This is an unfortuate quirk of lib curl.
I understand.
> Also, are you using 2.3.0, or one of the earlier patched versions? That
> might affect how it works.
I am using git-2.3.0
>> It appears patched git always wants credentials entered and ignores the
>> valid ticket.
>
> So what I think is happening is that you didn't specify a username, but
> git got a 401, so it prompted. Now it actually attempts to use the
> password you provided, whereas before it did not.
>
> Does it work with a ticket if you specify a username, as in the
> following URL?
> https://bmc@git.crustytoothpaste.net/git/bmc/homedir.git
Yes, that does work. Our project is 98% of the way there now.
I looked at both libcurl and git environment variables to see if there
was a way to specify the user without putting it in the URL. I didn’t see one.
My next step is the git configuration, either server or client. Do you know
if I should stop looking now because it’s not there?
Thank you for your help in getting us this far. This helps us tremendously.
—
Dan Langille
Infrastructure & Operations
Talos Group
Sourcefire, Inc.
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-03-11 19:33 ` Dan Langille (dalangil)
@ 2015-03-11 21:59 ` brian m. carlson
2015-03-12 13:09 ` Dan Langille (dalangil)
0 siblings, 1 reply; 41+ messages in thread
From: brian m. carlson @ 2015-03-11 21:59 UTC (permalink / raw)
To: Dan Langille (dalangil); +Cc: Junio C Hamano, git@vger.kernel.org, Jeff King
[-- Attachment #1: Type: text/plain, Size: 1018 bytes --]
On Wed, Mar 11, 2015 at 07:33:05PM +0000, Dan Langille (dalangil) wrote:
>> On Mar 10, 2015, at 6:29 PM, brian m. carlson <sandals@crustytoothpaste.net> wrote:
>> Does it work with a ticket if you specify a username, as in the
>> following URL?
>> https://bmc@git.crustytoothpaste.net/git/bmc/homedir.git
>
>Yes, that does work. Our project is 98% of the way there now.
>
>I looked at both libcurl and git environment variables to see if there
>was a way to specify the user without putting it in the URL. I didn’t see one.
>
>My next step is the git configuration, either server or client. Do you know
>if I should stop looking now because it’s not there?
You might try looking at git config --help. It looks like there's a
credential.username option that might do what you want.
--
brian m. carlson / brian with sandals: Houston, Texas, US
+1 832 623 2791 | http://www.crustytoothpaste.net/~bmc | My opinion only
OpenPGP: RSA v4 4096b: 88AC E9B2 9196 305B A994 7552 F1BA 225C 0223 B187
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
^ permalink raw reply [flat|nested] 41+ messages in thread
* Re: [PATCH v3] remote-curl: fall back to Basic auth if Negotiate fails
2015-03-11 21:59 ` brian m. carlson
@ 2015-03-12 13:09 ` Dan Langille (dalangil)
0 siblings, 0 replies; 41+ messages in thread
From: Dan Langille (dalangil) @ 2015-03-12 13:09 UTC (permalink / raw)
To: brian m. carlson; +Cc: Junio C Hamano, git@vger.kernel.org, Jeff King
> On Mar 11, 2015, at 5:59 PM, brian m. carlson <sandals@crustytoothpaste.net> wrote:
>
> On Wed, Mar 11, 2015 at 07:33:05PM +0000, Dan Langille (dalangil) wrote:
>>> On Mar 10, 2015, at 6:29 PM, brian m. carlson <sandals@crustytoothpaste.net> wrote:
>>> Does it work with a ticket if you specify a username, as in the
>>> following URL?
>>> https://bmc@git.crustytoothpaste.net/git/bmc/homedir.git
>>
>> Yes, that does work. Our project is 98% of the way there now.
>>
>> I looked at both libcurl and git environment variables to see if there
>> was a way to specify the user without putting it in the URL. I didn’t see one.
>>
>> My next step is the git configuration, either server or client. Do you know
>> if I should stop looking now because it’s not there?
>
> You might try looking at git config --help. It looks like there's a
> credential.username option that might do what you want.
Brian et al,
Thank you for your help and patience with this. It is appreciated.
—
Dan Langille
Infrastructure & Operations
Talos Group
Sourcefire, Inc.
^ permalink raw reply [flat|nested] 41+ messages in thread