* New upstream release (closes: #536182). Yes, I know 5.3p1 has been out

  for a while, but there's no GSSAPI patch available for it yet.
  - Change the default cipher order to prefer the AES CTR modes and the
    revised "arcfour256" mode to CBC mode ciphers that are susceptible to
    CPNI-957037 "Plaintext Recovery Attack Against SSH".
  - Add countermeasures to mitigate CPNI-957037-style attacks against the
    SSH protocol's use of CBC-mode ciphers. Upon detection of an invalid
    packet length or Message Authentication Code, ssh/sshd will continue
    reading up to the maximum supported packet length rather than
    immediately terminating the connection. This eliminates most of the
    known differences in behaviour that leaked information about the
    plaintext of injected data which formed the basis of this attack
    (closes: #506115, LP: #379329).
  - ForceCommand directive now accepts commandline arguments for the
    internal-sftp server (closes: #524423, LP: #362511).
  - Add AllowAgentForwarding to available Match keywords list (closes:
    #540623).
  - Make ssh(1) send the correct channel number for
    SSH2_MSG_CHANNEL_SUCCESS and SSH2_MSG_CHANNEL_FAILURE messages to
    avoid triggering 'Non-public channel' error messages on sshd(8) in
    openssh-5.1.
  - Avoid printing 'Non-public channel' warnings in sshd(8), since the
    ssh(1) has sent incorrect channel numbers since ~2004 (this reverts a
    behaviour introduced in openssh-5.1; closes: #496017).
* Update to GSSAPI patch from
  http://www.sxw.org.uk/computing/patches/openssh-5.2p1-gsskex-all-20090726.patch,
  including cascading credentials support (LP: #416958).

1 files changed, 20 insertions, 8 deletions

diff --git a/ssh-gss.h b/ssh-gss.h
index 4e9e357b5..31d5a0835 100644
--- a/ssh-gss.h
+++ b/ssh-gss.h
@@ -1,6 +1,6 @@
 /* $OpenBSD: ssh-gss.h,v 1.10 2007/06/12 08:20:00 djm Exp $ */
 /*
- * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
+ * Copyright (c) 2001-2009 Simon Wilkinson. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -75,6 +75,7 @@ typedef struct {
         char *filename;
         char *envvar;
         char *envval;
+        struct passwd *owner;
         void *data;
 } ssh_gssapi_ccache;
 
@@ -82,8 +83,11 @@ typedef struct {
         gss_buffer_desc displayname;
         gss_buffer_desc exportedname;
         gss_cred_id_t creds;
+        gss_name_t name;
         struct ssh_gssapi_mech_struct *mech;
         ssh_gssapi_ccache store;
+        int used;
+        int updated;
 } ssh_gssapi_client;
 
 typedef struct ssh_gssapi_mech_struct {
@@ -94,6 +98,7 @@ typedef struct ssh_gssapi_mech_struct {
         int (*userok) (ssh_gssapi_client *, char *);
         int (*localname) (ssh_gssapi_client *, char **);
         void (*storecreds) (ssh_gssapi_client *);
+        int (*updatecreds) (ssh_gssapi_ccache *, ssh_gssapi_client *);
 } ssh_gssapi_mech;
 
 typedef struct {
@@ -104,7 +109,7 @@ typedef struct {
         gss_OID         oid; /* client */
         gss_cred_id_t   creds; /* server */
         gss_name_t      client; /* server */
-        gss_cred_id_t   client_creds; /* server */
+        gss_cred_id_t   client_creds; /* both */
 } Gssctxt;
 
 extern ssh_gssapi_mech *supported_mechs[];
@@ -128,16 +133,21 @@ void ssh_gssapi_build_ctx(Gssctxt **);
 void ssh_gssapi_delete_ctx(Gssctxt **);
 OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t);
 void ssh_gssapi_buildmic(Buffer *, const char *, const char *, const char *);
-int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *);
+int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *, const char *);
+OM_uint32 ssh_gssapi_client_identity(Gssctxt *, const char *);
+int ssh_gssapi_credentials_updated(Gssctxt *);
 
 /* In the server */
-typedef int ssh_gssapi_check_fn(Gssctxt **, gss_OID, const char *);
-char *ssh_gssapi_client_mechanisms(const char *host);
-char *ssh_gssapi_kex_mechs(gss_OID_set, ssh_gssapi_check_fn *, const char *);
+typedef int ssh_gssapi_check_fn(Gssctxt **, gss_OID, const char *, 
+    const char *);
+char *ssh_gssapi_client_mechanisms(const char *, const char *);
+char *ssh_gssapi_kex_mechs(gss_OID_set, ssh_gssapi_check_fn *, const char *,
+    const char *);
 gss_OID ssh_gssapi_id_kex(Gssctxt *, char *, int);
-int ssh_gssapi_server_check_mech(Gssctxt **,gss_OID, const char *);
+int ssh_gssapi_server_check_mech(Gssctxt **,gss_OID, const char *, 
+    const char *);
 OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID);
-int ssh_gssapi_userok(char *name);
+int ssh_gssapi_userok(char *name, struct passwd *);
 OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t);
 void ssh_gssapi_do_child(char ***, u_int *);
 void ssh_gssapi_cleanup_creds(void);
@@ -145,6 +155,8 @@ void ssh_gssapi_storecreds(void);
 
 char *ssh_gssapi_server_mechanisms(void);
 int ssh_gssapi_oid_table_ok();
+
+int ssh_gssapi_update_creds(ssh_gssapi_ccache *store);
 #endif /* GSSAPI */
 
 #endif /* _SSH_GSS_H */