GSSAPI key exchange support

This patch has been rejected upstream: "None of the OpenSSH developers are
in favour of adding this, and this situation has not changed for several
years.  This is not a slight on Simon's patch, which is of fine quality, but
just that a) we don't trust GSSAPI implementations that much and b) we don't
like adding new KEX since they are pre-auth attack surface.  This one is
particularly scary, since it requires hooks out to typically root-owned
system resources."

However, quite a lot of people rely on this in Debian, and it's better to
have it merged into the main openssh package rather than having separate
-krb5 packages (as we used to have).  It seems to have a generally good
security history.

Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1242
Last-Updated: 2015-08-19

Patch-Name: gssapi.patch

1 files changed, 113 insertions, 0 deletions

diff --git a/ChangeLog.gssapi b/ChangeLog.gssapi
new file mode 100644
index 000000000..f117a336a
--- /dev/null
+++ b/ChangeLog.gssapi
@@ -0,0 +1,113 @@
+20110101
+  - Finally update for OpenSSH 5.6p1
+  - Add GSSAPIServerIdentity option from Jim Basney
+ 
+20100308
+  - [ Makefile.in, key.c, key.h ]
+    Updates for OpenSSH 5.4p1
+  - [ servconf.c ]
+    Include GSSAPI options in the sshd -T configuration dump, and flag
+    some older configuration options as being unsupported. Thanks to Colin 
+    Watson.
+  -
+
+20100124
+  - [ sshconnect2.c ]
+    Adapt to deal with additional element in Authmethod structure. Thanks to
+    Colin Watson
+
+20090615
+  - [ gss-genr.c gss-serv.c kexgssc.c kexgsss.c monitor.c sshconnect2.c
+      sshd.c ]
+    Fix issues identified by Greg Hudson following a code review
+        Check return value of gss_indicate_mechs
+        Protect GSSAPI calls in monitor, so they can only be used if enabled
+        Check return values of bignum functions in key exchange
+        Use BN_clear_free to clear other side's DH value
+        Make ssh_gssapi_id_kex more robust
+        Only configure kex table pointers if GSSAPI is enabled
+        Don't leak mechanism list, or gss mechanism list
+        Cast data.length before printing
+        If serverkey isn't provided, use an empty string, rather than NULL
+
+20090201
+  - [ gss-genr.c gss-serv.c kex.h kexgssc.c readconf.c readconf.h ssh-gss.h
+      ssh_config.5 sshconnet2.c ]
+    Add support for the GSSAPIClientIdentity option, which allows the user
+    to specify which GSSAPI identity to use to contact a given server
+
+20080404
+  - [ gss-serv.c ]
+    Add code to actually implement GSSAPIStrictAcceptCheck, which had somehow
+    been omitted from a previous version of this patch. Reported by Borislav
+    Stoichkov
+
+20070317
+  - [ gss-serv-krb5.c ]
+    Remove C99ism, where new_ccname was being declared in the middle of a 
+    function
+
+20061220
+  - [ servconf.c ]
+    Make default for GSSAPIStrictAcceptorCheck be Yes, to match previous, and 
+    documented, behaviour. Reported by Dan Watson.
+
+20060910
+  - [ gss-genr.c kexgssc.c kexgsss.c kex.h monitor.c sshconnect2.c sshd.c
+      ssh-gss.h ]
+    add support for gss-group14-sha1 key exchange mechanisms
+  - [ gss-serv.c servconf.c servconf.h sshd_config sshd_config.5 ]
+    Add GSSAPIStrictAcceptorCheck option to allow the disabling of
+    acceptor principal checking on multi-homed machines.
+    <Bugzilla #928>
+  - [ sshd_config ssh_config ]
+    Add settings for GSSAPIKeyExchange and GSSAPITrustDNS to the sample
+    configuration files
+  - [ kexgss.c kegsss.c sshconnect2.c sshd.c ]
+    Code cleanup. Replace strlen/xmalloc/snprintf sequences with xasprintf()
+    Limit length of error messages displayed by client
+
+20060909
+  - [ gss-genr.c gss-serv.c ]
+    move ssh_gssapi_acquire_cred() and ssh_gssapi_server_ctx to be server
+    only, where they belong 
+    <Bugzilla #1225>
+
+20060829
+  - [ gss-serv-krb5.c ]
+    Fix CCAPI credentials cache name when creating KRB5CCNAME environment 
+    variable
+
+20060828
+  - [ gss-genr.c ]
+    Avoid Heimdal context freeing problem
+    <Fixed upstream 20060829>
+
+20060818
+  - [ gss-genr.c ssh-gss.h sshconnect2.c ]
+    Make sure that SPENGO is disabled 
+    <Bugzilla #1218 - Fixed upstream 20060818>
+
+20060421
+  - [ gssgenr.c, sshconnect2.c ]
+    a few type changes (signed versus unsigned, int versus size_t) to
+    fix compiler errors/warnings 
+    (from jbasney AT ncsa.uiuc.edu)
+  - [ kexgssc.c, sshconnect2.c ]
+    fix uninitialized variable warnings
+    (from jbasney AT ncsa.uiuc.edu)
+  - [ gssgenr.c ]
+    pass oid to gss_display_status (helpful when using GSSAPI mechglue)
+    (from jbasney AT ncsa.uiuc.edu)
+    <Bugzilla #1220 >
+  - [ gss-serv-krb5.c ]
+    #ifdef HAVE_GSSAPI_KRB5 should be #ifdef HAVE_GSSAPI_KRB5_H
+    (from jbasney AT ncsa.uiuc.edu)
+    <Fixed upstream 20060304>
+  - [ readconf.c, readconf.h, ssh_config.5, sshconnect2.c 
+    add client-side GssapiKeyExchange option
+    (from jbasney AT ncsa.uiuc.edu)
+  - [ sshconnect2.c ]
+    add support for GssapiTrustDns option for gssapi-with-mic
+    (from jbasney AT ncsa.uiuc.edu)
+    <gssapi-with-mic support is Bugzilla #1008>