openssh/openssh-6.6p1-GSSAPIEnablek5users.patch

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diff -up openssh-6.8p1/gss-serv-krb5.c.GSSAPIEnablek5users openssh-6.8p1/gss-serv-krb5.c
--- openssh-6.8p1/gss-serv-krb5.c.GSSAPIEnablek5users 2015-03-18 13:04:21.505306818 +0100
+++ openssh-6.8p1/gss-serv-krb5.c 2015-03-18 13:04:21.527306764 +0100
@@ -260,7 +260,6 @@ ssh_gssapi_krb5_cmdok(krb5_principal pri
FILE *fp;
char file[MAXPATHLEN];
char line[BUFSIZ] = "";
- char kuser[65]; /* match krb5_kuserok() */
struct stat st;
struct passwd *pw = the_authctxt->pw;
int found_principal = 0;
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@@ -269,7 +268,7 @@ ssh_gssapi_krb5_cmdok(krb5_principal pri
snprintf(file, sizeof(file), "%s/.k5users", pw->pw_dir);
/* If both .k5login and .k5users DNE, self-login is ok. */
- if (!k5login_exists && (access(file, F_OK) == -1)) {
+ if ( !options.enable_k5users || (!k5login_exists && (access(file, F_OK) == -1))) {
return ssh_krb5_kuserok(krb_context, principal, luser,
k5login_exists);
}
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diff -up openssh-6.8p1/servconf.c.GSSAPIEnablek5users openssh-6.8p1/servconf.c
--- openssh-6.8p1/servconf.c.GSSAPIEnablek5users 2015-03-18 13:04:21.516306791 +0100
+++ openssh-6.8p1/servconf.c 2015-03-18 13:05:26.846146608 +0100
@@ -168,6 +168,7 @@ initialize_server_options(ServerOptions
options->version_addendum = NULL;
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options->fingerprint_hash = -1;
options->use_kuserok = -1;
+ options->enable_k5users = -1;
}
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/* Returns 1 if a string option is unset or set to "none" or 0 otherwise. */
@@ -348,6 +349,8 @@ fill_default_server_options(ServerOption
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options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
if (options->use_kuserok == -1)
options->use_kuserok = 1;
+ if (options->enable_k5users == -1)
+ options->enable_k5users = 0;
/* Turn privilege separation on by default */
if (use_privsep == -1)
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use_privsep = PRIVSEP_NOSANDBOX;
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@@ -406,7 +409,7 @@ typedef enum {
sBanner, sShowPatchLevel, sUseDNS, sHostbasedAuthentication,
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sHostbasedUsesNameFromPacketOnly, sHostbasedAcceptedKeyTypes,
sClientAliveInterval, sClientAliveCountMax, sAuthorizedKeysFile,
- sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
+ sGssAuthentication, sGssCleanupCreds, sGssEnablek5users, sGssStrictAcceptor,
sGssKeyEx, sGssStoreRekey, sAcceptEnv, sPermitTunnel,
sMatch, sPermitOpen, sForceCommand, sChrootDirectory,
sUsePrivilegeSeparation, sAllowAgentForwarding,
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@@ -484,6 +487,7 @@ static struct {
{ "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
{ "gssapikeyexchange", sGssKeyEx, SSHCFG_GLOBAL },
{ "gssapistorecredentialsonrekey", sGssStoreRekey, SSHCFG_GLOBAL },
+ { "gssapienablek5users", sGssEnablek5users, SSHCFG_ALL },
#else
{ "gssapiauthentication", sUnsupported, SSHCFG_ALL },
{ "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
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@@ -491,6 +495,7 @@ static struct {
{ "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
{ "gssapikeyexchange", sUnsupported, SSHCFG_GLOBAL },
{ "gssapistorecredentialsonrekey", sUnsupported, SSHCFG_GLOBAL },
+ { "gssapienablek5users", sUnsupported, SSHCFG_ALL },
#endif
{ "gssusesessionccache", sUnsupported, SSHCFG_GLOBAL },
{ "gssapiusesessioncredcache", sUnsupported, SSHCFG_GLOBAL },
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@@ -1623,6 +1628,10 @@ process_server_config_line(ServerOptions
intptr = &options->use_kuserok;
goto parse_flag;
+ case sGssEnablek5users:
+ intptr = &options->enable_k5users;
+ goto parse_flag;
+
case sPermitOpen:
arg = strdelim(&cp);
if (!arg || *arg == '\0')
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@@ -1947,6 +1956,7 @@ copy_set_server_options(ServerOptions *d
M_CP_INTOPT(ip_qos_interactive);
M_CP_INTOPT(ip_qos_bulk);
M_CP_INTOPT(use_kuserok);
+ M_CP_INTOPT(enable_k5users);
M_CP_INTOPT(rekey_limit);
M_CP_INTOPT(rekey_interval);
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@@ -2207,6 +2217,7 @@ dump_config(ServerOptions *o)
dump_cfg_fmtint(sUsePrivilegeSeparation, use_privsep);
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dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
dump_cfg_fmtint(sKerberosUseKuserok, o->use_kuserok);
+ dump_cfg_fmtint(sGssEnablek5users, o->enable_k5users);
/* string arguments */
dump_cfg_string(sPidFile, o->pid_file);
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diff -up openssh-6.8p1/servconf.h.GSSAPIEnablek5users openssh-6.8p1/servconf.h
--- openssh-6.8p1/servconf.h.GSSAPIEnablek5users 2015-03-18 13:04:21.506306815 +0100
+++ openssh-6.8p1/servconf.h 2015-03-18 13:04:21.528306762 +0100
@@ -177,7 +177,8 @@ typedef struct {
int num_permitted_opens;
- int use_kuserok;
+ int use_kuserok;
+ int enable_k5users;
char *chroot_directory;
char *revoked_keys_file;
char *trusted_user_ca_keys;
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diff -up openssh-6.8p1/sshd_config.GSSAPIEnablek5users openssh-6.8p1/sshd_config
--- openssh-6.8p1/sshd_config.GSSAPIEnablek5users 2015-03-18 13:04:21.506306815 +0100
+++ openssh-6.8p1/sshd_config 2015-03-18 13:04:21.528306762 +0100
@@ -94,6 +94,7 @@ GSSAPIAuthentication yes
GSSAPICleanupCredentials no
#GSSAPIStrictAcceptorCheck yes
#GSSAPIKeyExchange no
+#GSSAPIEnablek5users no
# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
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diff -up openssh-6.8p1/sshd_config.5.GSSAPIEnablek5users openssh-6.8p1/sshd_config.5
--- openssh-6.8p1/sshd_config.5.GSSAPIEnablek5users 2015-03-18 13:04:21.506306815 +0100
+++ openssh-6.8p1/sshd_config.5 2015-03-18 13:04:21.528306762 +0100
@@ -576,6 +576,12 @@ on logout.
The default is
.Dq yes .
Note that this option applies to protocol version 2 only.
+.It Cm GSSAPIEnablek5users
+Specifies whether to look at .k5users file for GSSAPI authentication
+access control. Further details are described in
+.Xr ksu 1 .
+The default is
+.Dq no .
.It Cm GSSAPIStrictAcceptorCheck
Determines whether to be strict about the identity of the GSSAPI acceptor
a client authenticates against. If