138 lines
5.0 KiB
Diff
138 lines
5.0 KiB
Diff
diff --git a/gss-serv-krb5.c b/gss-serv-krb5.c
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index 961c564..0fcfd7b 100644
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--- a/gss-serv-krb5.c
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+++ b/gss-serv-krb5.c
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@@ -260,7 +260,6 @@ ssh_gssapi_krb5_cmdok(krb5_principal principal, const char *name,
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FILE *fp;
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char file[MAXPATHLEN];
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char line[BUFSIZ];
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- char kuser[65]; /* match krb5_kuserok() */
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struct stat st;
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struct passwd *pw = the_authctxt->pw;
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int found_principal = 0;
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@@ -269,7 +268,7 @@ ssh_gssapi_krb5_cmdok(krb5_principal principal, const char *name,
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snprintf(file, sizeof(file), "%s/.k5users", pw->pw_dir);
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/* If both .k5login and .k5users DNE, self-login is ok. */
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- if (!k5login_exists && (access(file, F_OK) == -1)) {
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+ if ( !options.enable_k5users || (!k5login_exists && (access(file, F_OK) == -1))) {
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return ssh_krb5_kuserok(krb_context, principal, luser,
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k5login_exists);
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}
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diff --git a/servconf.c b/servconf.c
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index e4164b1..87a311b 100644
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--- a/servconf.c
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+++ b/servconf.c
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@@ -164,6 +164,7 @@ initialize_server_options(ServerOptions *options)
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options->version_addendum = NULL;
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options->fingerprint_hash = -1;
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options->use_kuserok = -1;
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+ options->enable_k5users = -1;
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}
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void
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@@ -331,6 +332,8 @@ fill_default_server_options(ServerOptions *options)
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options->fingerprint_hash = SSH_FP_HASH_DEFAULT;
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if (options->use_kuserok == -1)
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options->use_kuserok = 1;
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+ if (options->enable_k5users == -1)
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+ options->enable_k5users = 0;
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/* Turn privilege separation on by default */
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if (use_privsep == -1)
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use_privsep = PRIVSEP_NOSANDBOX;
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@@ -371,7 +374,7 @@ typedef enum {
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sBanner, sShowPatchLevel, sUseDNS, sHostbasedAuthentication,
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sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
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sClientAliveCountMax, sAuthorizedKeysFile,
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- sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
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+ sGssAuthentication, sGssCleanupCreds, sGssEnablek5users, sGssStrictAcceptor,
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sGssKeyEx, sGssStoreRekey, sAcceptEnv, sPermitTunnel,
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sMatch, sPermitOpen, sForceCommand, sChrootDirectory,
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sUsePrivilegeSeparation, sAllowAgentForwarding,
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@@ -447,6 +450,7 @@ static struct {
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{ "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
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{ "gssapikeyexchange", sGssKeyEx, SSHCFG_GLOBAL },
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{ "gssapistorecredentialsonrekey", sGssStoreRekey, SSHCFG_GLOBAL },
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+ { "gssapienablek5users", sGssEnablek5users, SSHCFG_ALL },
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#else
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{ "gssapiauthentication", sUnsupported, SSHCFG_ALL },
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{ "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
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@@ -454,6 +458,7 @@ static struct {
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{ "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
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{ "gssapikeyexchange", sUnsupported, SSHCFG_GLOBAL },
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{ "gssapistorecredentialsonrekey", sUnsupported, SSHCFG_GLOBAL },
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+ { "gssapienablek5users", sUnsupported, SSHCFG_ALL },
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#endif
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{ "gssusesessionccache", sUnsupported, SSHCFG_GLOBAL },
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{ "gssapiusesessioncredcache", sUnsupported, SSHCFG_GLOBAL },
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@@ -1566,6 +1571,10 @@ process_server_config_line(ServerOptions *options, char *line,
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intptr = &options->use_kuserok;
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goto parse_flag;
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+ case sGssEnablek5users:
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+ intptr = &options->enable_k5users;
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+ goto parse_flag;
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+
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case sPermitOpen:
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arg = strdelim(&cp);
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if (!arg || *arg == '\0')
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@@ -1884,6 +1893,7 @@ copy_set_server_options(ServerOptions *dst, ServerOptions *src, int preauth)
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M_CP_INTOPT(ip_qos_interactive);
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M_CP_INTOPT(ip_qos_bulk);
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M_CP_INTOPT(use_kuserok);
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+ M_CP_INTOPT(enable_k5users);
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M_CP_INTOPT(rekey_limit);
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M_CP_INTOPT(rekey_interval);
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@@ -2143,6 +2153,7 @@ dump_config(ServerOptions *o)
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dump_cfg_fmtint(sUsePrivilegeSeparation, use_privsep);
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dump_cfg_fmtint(sFingerprintHash, o->fingerprint_hash);
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dump_cfg_fmtint(sKerberosUseKuserok, o->use_kuserok);
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+ dump_cfg_fmtint(sGssEnablek5users, o->enable_k5users);
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/* string arguments */
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dump_cfg_string(sPidFile, o->pid_file);
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diff --git a/servconf.h b/servconf.h
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index cf2a505..070a8ed 100644
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--- a/servconf.h
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+++ b/servconf.h
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@@ -175,7 +175,8 @@ typedef struct {
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int num_permitted_opens;
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- int use_kuserok;
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+ int use_kuserok;
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+ int enable_k5users;
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char *chroot_directory;
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char *revoked_keys_file;
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char *trusted_user_ca_keys;
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diff --git a/sshd_config b/sshd_config
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index 0d9454d..e731de1 100644
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--- a/sshd_config
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+++ b/sshd_config
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@@ -94,6 +94,7 @@ GSSAPIAuthentication yes
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GSSAPICleanupCredentials no
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#GSSAPIStrictAcceptorCheck yes
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#GSSAPIKeyExchange no
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+#GSSAPIEnablek5users no
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# Set this to 'yes' to enable PAM authentication, account processing,
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# and session processing. If this is enabled, PAM authentication will
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diff --git a/sshd_config.5 b/sshd_config.5
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index eb4dd9e..ce1229b 100644
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--- a/sshd_config.5
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+++ b/sshd_config.5
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@@ -548,6 +548,12 @@ on logout.
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The default is
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.Dq yes .
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Note that this option applies to protocol version 2 only.
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+.It Cm GSSAPIEnablek5users
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+Specifies whether to look at .k5users file for GSSAPI authentication
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+access control. Further details are described in
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+.Xr ksu 1 .
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+The default is
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+.Dq no .
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.It Cm GSSAPIStrictAcceptorCheck
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Determines whether to be strict about the identity of the GSSAPI acceptor
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a client authenticates against. If
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