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authorKnut Franke <k.franke@science-computing.de>2016-01-26 13:02:47 (GMT)
committerJunio C Hamano <gitster@pobox.com>2016-01-26 18:53:09 (GMT)
commitef976395e26a25fb6d048d859a1c8cddb2640b9a (patch)
tree7630031feb3f75f6657d5a320d62b1692f53aa22
parent754884255bb580df159e58defa81cdd30b5c430c (diff)
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http: allow selection of proxy authentication method
CURLAUTH_ANY does not work with proxies which answer unauthenticated requests with a 307 redirect to an error page instead of a 407 listing supported authentication methods. Therefore, allow the authentication method to be set using the environment variable GIT_HTTP_PROXY_AUTHMETHOD or configuration variables http.proxyAuthmethod and remote.<name>.proxyAuthmethod (in analogy to http.proxy and remote.<name>.proxy). The following values are supported: * anyauth (default) * basic * digest * negotiate * ntlm Signed-off-by: Knut Franke <k.franke@science-computing.de> Signed-off-by: Elia Pinto <gitter.spiros@gmail.com> Helped-by: Junio C Hamano <gitster@pobox.com> Helped-by: Eric Sunshine <sunshine@sunshineco.com> Helped-by: Elia Pinto <gitter.spiros@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--Documentation/config.txt26
-rw-r--r--Documentation/technical/api-remote.txt4
-rw-r--r--http.c65
-rw-r--r--remote.c3
-rw-r--r--remote.h1
5 files changed, 96 insertions, 3 deletions
diff --git a/Documentation/config.txt b/Documentation/config.txt
index f617886..a6c3d0f 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -1600,6 +1600,27 @@ http.proxy::
`curl(1)`). This can be overridden on a per-remote basis; see
remote.<name>.proxy
+http.proxyAuthMethod::
+ Set the method with which to authenticate against the HTTP proxy. This
+ only takes effect if the configured proxy string contains a user name part
+ (i.e. is of the form 'user@host' or 'user@host:port'). This can be
+ overridden on a per-remote basis; see `remote.<name>.proxyAuthMethod`.
+ Both can be overridden by the 'GIT_HTTP_PROXY_AUTHMETHOD' environment
+ variable. Possible values are:
++
+--
+* `anyauth` - Automatically pick a suitable authentication method. It is
+ assumed that the proxy answers an unauthenticated request with a 407
+ status code and one or more Proxy-authenticate headers with supported
+ authentication methods. This is the default.
+* `basic` - HTTP Basic authentication
+* `digest` - HTTP Digest authentication; this prevents the password from being
+ transmitted to the proxy in clear text
+* `negotiate` - GSS-Negotiate authentication (compare the --negotiate option
+ of `curl(1)`)
+* `ntlm` - NTLM authentication (compare the --ntlm option of `curl(1)`)
+--
+
http.cookieFile::
File containing previously stored cookie lines which should be used
in the Git http session, if they match the server. The file format
@@ -2407,6 +2428,11 @@ remote.<name>.proxy::
the proxy to use for that remote. Set to the empty string to
disable proxying for that remote.
+remote.<name>.proxyAuthMethod::
+ For remotes that require curl (http, https and ftp), the method to use for
+ authenticating against the proxy in use (probably set in
+ `remote.<name>.proxy`). See `http.proxyAuthMethod`.
+
remote.<name>.fetch::
The default set of "refspec" for linkgit:git-fetch[1]. See
linkgit:git-fetch[1].
diff --git a/Documentation/technical/api-remote.txt b/Documentation/technical/api-remote.txt
index 2cfdd22..f10941b 100644
--- a/Documentation/technical/api-remote.txt
+++ b/Documentation/technical/api-remote.txt
@@ -51,6 +51,10 @@ struct remote
The proxy to use for curl (http, https, ftp, etc.) URLs.
+`http_proxy_authmethod`::
+
+ The method used for authenticating against `http_proxy`.
+
struct remotes can be found by name with remote_get(), and iterated
through with for_each_remote(). remote_get(NULL) will return the
default remote, given the current branch and configuration.
diff --git a/http.c b/http.c
index 0da9e66..f46bfc4 100644
--- a/http.c
+++ b/http.c
@@ -62,6 +62,24 @@ static long curl_low_speed_limit = -1;
static long curl_low_speed_time = -1;
static int curl_ftp_no_epsv;
static const char *curl_http_proxy;
+static const char *http_proxy_authmethod;
+static struct {
+ const char *name;
+ long curlauth_param;
+} proxy_authmethods[] = {
+ { "basic", CURLAUTH_BASIC },
+ { "digest", CURLAUTH_DIGEST },
+ { "negotiate", CURLAUTH_GSSNEGOTIATE },
+ { "ntlm", CURLAUTH_NTLM },
+#ifdef LIBCURL_CAN_HANDLE_AUTH_ANY
+ { "anyauth", CURLAUTH_ANY },
+#endif
+ /*
+ * CURLAUTH_DIGEST_IE has no corresponding command-line option in
+ * curl(1) and is not included in CURLAUTH_ANY, so we leave it out
+ * here, too
+ */
+};
static const char *curl_cookie_file;
static int curl_save_cookies;
struct credential http_auth = CREDENTIAL_INIT;
@@ -256,6 +274,9 @@ static int http_options(const char *var, const char *value, void *cb)
if (!strcmp("http.proxy", var))
return git_config_string(&curl_http_proxy, var, value);
+ if (!strcmp("http.proxyauthmethod", var))
+ return git_config_string(&http_proxy_authmethod, var, value);
+
if (!strcmp("http.cookiefile", var))
return git_config_string(&curl_cookie_file, var, value);
if (!strcmp("http.savecookies", var)) {
@@ -304,6 +325,40 @@ static void init_curl_http_auth(CURL *result)
#endif
}
+/* *var must be free-able */
+static void var_override(const char **var, char *value)
+{
+ if (value) {
+ free((void *)*var);
+ *var = xstrdup(value);
+ }
+}
+
+static void init_curl_proxy_auth(CURL *result)
+{
+ var_override(&http_proxy_authmethod, getenv("GIT_HTTP_PROXY_AUTHMETHOD"));
+
+#if LIBCURL_VERSION_NUM >= 0x070a07 /* CURLOPT_PROXYAUTH and CURLAUTH_ANY */
+ if (http_proxy_authmethod) {
+ int i;
+ for (i = 0; i < ARRAY_SIZE(proxy_authmethods); i++) {
+ if (!strcmp(http_proxy_authmethod, proxy_authmethods[i].name)) {
+ curl_easy_setopt(result, CURLOPT_PROXYAUTH,
+ proxy_authmethods[i].curlauth_param);
+ break;
+ }
+ }
+ if (i == ARRAY_SIZE(proxy_authmethods)) {
+ warning("unsupported proxy authentication method %s: using anyauth",
+ http_proxy_authmethod);
+ curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
+ }
+ }
+ else
+ curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
+#endif
+}
+
static int has_cert_password(void)
{
if (ssl_cert == NULL || ssl_cert_password_required != 1)
@@ -476,9 +531,7 @@ static CURL *get_curl_handle(void)
CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
#endif
}
-#if LIBCURL_VERSION_NUM >= 0x070a07
- curl_easy_setopt(result, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
-#endif
+ init_curl_proxy_auth(result);
set_curl_keepalive(result);
@@ -519,6 +572,9 @@ void http_init(struct remote *remote, const char *url, int proactive_auth)
if (remote && remote->http_proxy)
curl_http_proxy = xstrdup(remote->http_proxy);
+ if (remote)
+ var_override(&http_proxy_authmethod, remote->http_proxy_authmethod);
+
pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
@@ -617,6 +673,9 @@ void http_cleanup(void)
curl_http_proxy = NULL;
}
+ free((void *)http_proxy_authmethod);
+ http_proxy_authmethod = NULL;
+
if (cert_auth.password != NULL) {
memset(cert_auth.password, 0, strlen(cert_auth.password));
free(cert_auth.password);
diff --git a/remote.c b/remote.c
index 9d34b5a..0bb5a69 100644
--- a/remote.c
+++ b/remote.c
@@ -428,6 +428,9 @@ static int handle_config(const char *key, const char *value, void *cb)
} else if (!strcmp(subkey, ".proxy")) {
return git_config_string((const char **)&remote->http_proxy,
key, value);
+ } else if (!strcmp(subkey, ".proxyauthmethod")) {
+ return git_config_string((const char **)&remote->http_proxy_authmethod,
+ key, value);
} else if (!strcmp(subkey, ".vcs")) {
return git_config_string(&remote->foreign_vcs, key, value);
}
diff --git a/remote.h b/remote.h
index 4a039ba..4fd7a0f 100644
--- a/remote.h
+++ b/remote.h
@@ -54,6 +54,7 @@ struct remote {
* for curl remotes only
*/
char *http_proxy;
+ char *http_proxy_authmethod;
};
struct remote *remote_get(const char *name);