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Code Issues Releases Wiki Activity

- Christian Krause filed bug #2221237

Browse Source 
(http://curl.haxx.se/bug/view.cgi?id=2221237) that identified an infinite
  loop during GSS authentication given some specific conditions. With his
  patience and great feedback I managed to narrow down the problem and
  eventually fix it although I can't test any of this myself!
This commit is contained in:
Daniel Stenberg 2008-12-08 13:52:20 +00:00
parent dff4ce92ad
commit 42365aa7ef
4 changed files with 44 additions and 17 deletions
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7
CHANGES
View File

@ -6,6 +6,13 @@
Changelog
Daniel Stenberg (8 Dec 2008)
- Christian Krause filed bug #2221237
(http://curl.haxx.se/bug/view.cgi?id=2221237) that identified an infinite
loop during GSS authentication given some specific conditions. With his
patience and great feedback I managed to narrow down the problem and
eventually fix it although I can't test any of this myself!
Daniel Fandrich (3 Dec 2008)
- Fixed the getifaddrs version of Curl_if2ip to work on systems without IPv6
support (e.g. Minix)

1
RELEASE-NOTES
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@ -24,6 +24,7 @@ This release includes the following bugfixes:
o fix SCP/SFTP busyloop by using a new libssh2 0.19 function
o bad fclose() after a fatal error in cookie code
o curl_multi_remove_handle() when the handle was in use in a HTTP pipeline
o GSS authentication infinite loop problem
This release includes the following known bugs:

32
lib/http.c
View File

@ -529,6 +529,7 @@ output_auth_headers(struct connectdata *conn,
if(result)
return result;
authstatus->done = TRUE;
data->state.negotiate.state = GSS_AUTHSENT;
}
else
#endif
@ -707,24 +708,39 @@ CURLcode Curl_http_input_auth(struct connectdata *conn,
* If the provided authentication is wanted as one out of several accepted
* types (using &), we OR this authentication type to the authavail
* variable.
*
* Note:
*
* ->picked is first set to the 'want' value (one or more bits) before the
* request is sent, and then it is again set _after_ all response 401/407
* headers have been received but then only to a single preferred method
* (bit).
*
*/
#ifdef HAVE_GSSAPI
if(checkprefix("GSS-Negotiate", start) ||
checkprefix("Negotiate", start)) {
int neg;
*availp |= CURLAUTH_GSSNEGOTIATE;
authp->avail |= CURLAUTH_GSSNEGOTIATE;
if(authp->picked == CURLAUTH_GSSNEGOTIATE) {
/* if exactly this is wanted, go */
int neg = Curl_input_negotiate(conn, (bool)(httpcode == 407), start);
if(data->state.negotiate.state == GSS_AUTHSENT) {
/* if we sent GSS authentication in the outgoing request and we get this
back, we're in trouble */
infof(data, "Authentication problem. Ignoring this.\n");
data->state.authproblem = TRUE;
}
else {
neg = Curl_input_negotiate(conn, (bool)(httpcode == 407), start);
if(neg == 0) {
DEBUGASSERT(!data->req.newurl);
data->req.newurl = strdup(data->change.url);
data->state.authproblem = (data->req.newurl == NULL);
}
else {
infof(data, "Authentication problem. Ignoring this.\n");
data->state.authproblem = TRUE;
if(!data->req.newurl)
return CURLE_OUT_OF_MEMORY;
data->state.authproblem = FALSE;
/* we received GSS auth info and we dealt with it fine */
data->state.negotiate.state = GSS_AUTHRECV;
}
}
}

3
lib/urldata.h
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@ -299,6 +299,9 @@ struct ntlmdata {
#ifdef HAVE_GSSAPI
struct negotiatedata {
/* when doing Negotiate we first need to receive an auth token and then we
need to send our header */
enum { GSS_AUTHNONE, GSS_AUTHRECV, GSS_AUTHSENT } state;
bool gss; /* Whether we're processing GSS-Negotiate or Negotiate */
const char* protocol; /* "GSS-Negotiate" or "Negotiate" */
OM_uint32 status;