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openssh/openssh-5.8p2-kuserok.patch

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diff -up openssh-5.8p2/auth-krb5.c.kuserok openssh-5.8p2/auth-krb5.c
--- openssh-5.8p2/auth-krb5.c.kuserok 2011-05-19 16:55:57.176106243 +0200
+++ openssh-5.8p2/auth-krb5.c 2011-05-19 16:56:02.009109884 +0200
@@ -54,6 +54,20 @@
extern ServerOptions options;
+int
+ssh_krb5_kuserok(krb5_context krb5_ctx, krb5_principal krb5_user, const char *client)
+{
+ if (options.use_kuserok)
+ return krb5_kuserok(krb5_ctx, krb5_user, client);
+ else {
+ char kuser[65];
+
+ if (krb5_aname_to_localname(krb5_ctx, krb5_user, sizeof(kuser), kuser))
+ return 0;
+ return strcmp(kuser, client) == 0;
+ }
+}
+
static int
krb5_init(void *context)
{
@@ -146,7 +160,7 @@ auth_krb5_password(Authctxt *authctxt, c
if (problem)
goto out;
- if (!krb5_kuserok(authctxt->krb5_ctx, authctxt->krb5_user, client)) {
+ if (!ssh_krb5_kuserok(authctxt->krb5_ctx, authctxt->krb5_user, client)) {
problem = -1;
goto out;
}
diff -up openssh-5.8p2/gss-serv-krb5.c.kuserok openssh-5.8p2/gss-serv-krb5.c
--- openssh-5.8p2/gss-serv-krb5.c.kuserok 2011-05-19 16:56:01.000000000 +0200
+++ openssh-5.8p2/gss-serv-krb5.c 2011-05-20 05:48:50.681167894 +0200
@@ -68,6 +68,7 @@ static int ssh_gssapi_krb5_cmdok(krb5_pr
int);
static krb5_context krb_context = NULL;
+extern int ssh_krb5_kuserok(krb5_context, krb5_principal, const char *);
/* Initialise the krb5 library, for the stuff that GSSAPI won't do */
@@ -115,7 +116,7 @@ ssh_gssapi_krb5_userok(ssh_gssapi_client
/* NOTE: .k5login and .k5users must opened as root, not the user,
* because if they are on a krb5-protected filesystem, user credentials
* to access these files aren't available yet. */
- if (krb5_kuserok(krb_context, princ, luser) && k5login_exists) {
+ if (ssh_krb5_kuserok(krb_context, princ, luser) && k5login_exists) {
retval = 1;
logit("Authorized to %s, krb5 principal %s (krb5_kuserok)",
luser, (char *)client->displayname.value);
diff -up openssh-5.8p2/servconf.c.kuserok openssh-5.8p2/servconf.c
--- openssh-5.8p2/servconf.c.kuserok 2011-05-19 16:55:59.549112264 +0200
+++ openssh-5.8p2/servconf.c 2011-05-19 16:56:02.332106613 +0200
@@ -145,6 +145,7 @@ initialize_server_options(ServerOptions
options->authorized_principals_file = NULL;
options->ip_qos_interactive = -1;
options->ip_qos_bulk = -1;
+ options->use_kuserok = -1;
}
void
@@ -300,6 +301,8 @@ fill_default_server_options(ServerOption
if (use_privsep == -1)
use_privsep = 1;
+ if (options->use_kuserok == -1)
+ options->use_kuserok = 1;
#ifndef HAVE_MMAP
if (use_privsep && options->compression == 1) {
error("This platform does not support both privilege "
@@ -321,7 +324,7 @@ typedef enum {
sPermitRootLogin, sLogFacility, sLogLevel,
sRhostsRSAAuthentication, sRSAAuthentication,
sKerberosAuthentication, sKerberosOrLocalPasswd, sKerberosTicketCleanup,
- sKerberosGetAFSToken,
+ sKerberosGetAFSToken, sKerberosUseKuserok,
sKerberosTgtPassing, sChallengeResponseAuthentication,
sPasswordAuthentication, sKbdInteractiveAuthentication,
sListenAddress, sAddressFamily,
@@ -392,11 +395,13 @@ static struct {
#else
{ "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
#endif
+ { "kerberosusekuserok", sKerberosUseKuserok, SSHCFG_ALL },
#else
{ "kerberosauthentication", sUnsupported, SSHCFG_ALL },
{ "kerberosorlocalpasswd", sUnsupported, SSHCFG_GLOBAL },
{ "kerberosticketcleanup", sUnsupported, SSHCFG_GLOBAL },
{ "kerberosgetafstoken", sUnsupported, SSHCFG_GLOBAL },
+ { "kerberosusekuserok", sUnsupported, SSHCFG_ALL },
#endif
{ "kerberostgtpassing", sUnsupported, SSHCFG_GLOBAL },
{ "afstokenpassing", sUnsupported, SSHCFG_GLOBAL },
@@ -1374,6 +1379,10 @@ process_server_config_line(ServerOptions
*activep = value;
break;
+ case sKerberosUseKuserok:
+ intptr = &options->use_kuserok;
+ goto parse_flag;
+
case sPermitOpen:
arg = strdelim(&cp);
if (!arg || *arg == '\0')
@@ -1577,6 +1586,7 @@ copy_set_server_options(ServerOptions *d
M_CP_INTOPT(max_authtries);
M_CP_INTOPT(ip_qos_interactive);
M_CP_INTOPT(ip_qos_bulk);
+ M_CP_INTOPT(use_kuserok);
M_CP_STROPT(banner);
if (preauth)
@@ -1800,6 +1810,7 @@ dump_config(ServerOptions *o)
dump_cfg_fmtint(sUseDNS, o->use_dns);
dump_cfg_fmtint(sAllowTcpForwarding, o->allow_tcp_forwarding);
dump_cfg_fmtint(sUsePrivilegeSeparation, use_privsep);
+ dump_cfg_fmtint(sKerberosUseKuserok, o->use_kuserok);
/* string arguments */
dump_cfg_string(sPidFile, o->pid_file);
diff -up openssh-5.8p2/servconf.h.kuserok openssh-5.8p2/servconf.h
--- openssh-5.8p2/servconf.h.kuserok 2011-05-19 16:55:59.676167388 +0200
+++ openssh-5.8p2/servconf.h 2011-05-19 16:56:02.449168732 +0200
@@ -160,6 +160,7 @@ typedef struct {
int num_permitted_opens;
+ int use_kuserok;
char *chroot_directory;
char *revoked_keys_file;
char *trusted_user_ca_keys;
diff -up openssh-5.8p2/sshd_config.5.kuserok openssh-5.8p2/sshd_config.5
--- openssh-5.8p2/sshd_config.5.kuserok 2011-05-19 16:56:00.265169181 +0200
+++ openssh-5.8p2/sshd_config.5 2011-05-19 16:56:02.588114955 +0200
@@ -602,6 +602,10 @@ Specifies whether to automatically destr
file on logout.
The default is
.Dq yes .
+.It Cm KerberosUseKuserok
+Specifies whether to look at .k5login file for user's aliases.
+The default is
+.Dq yes .
.It Cm KexAlgorithms
Specifies the available KEX (Key Exchange) algorithms.
Multiple algorithms must be comma-separated.
@@ -743,6 +747,7 @@ Available keywords are
.Cm HostbasedUsesNameFromPacketOnly ,
.Cm KbdInteractiveAuthentication ,
.Cm KerberosAuthentication ,
+.Cm KerberosUseKuserok ,
.Cm MaxAuthTries ,
.Cm MaxSessions ,
.Cm PubkeyAuthentication ,
diff -up openssh-5.8p2/sshd_config.kuserok openssh-5.8p2/sshd_config
--- openssh-5.8p2/sshd_config.kuserok 2011-05-19 16:56:00.886106293 +0200
+++ openssh-5.8p2/sshd_config 2011-05-19 16:56:02.716105342 +0200
@@ -73,6 +73,7 @@ ChallengeResponseAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no
+#KerberosUseKuserok yes
# GSSAPI options
#GSSAPIAuthentication no
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