-/* $OpenBSD: gss-serv-krb5.c,v 1.1 2003/08/22 10:56:09 markus Exp $ */
+/* $OpenBSD: gss-serv-krb5.c,v 1.7 2006/08/03 03:34:42 deraadt Exp $ */
/*
- * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
+ * Copyright (c) 2001-2007 Simon Wilkinson. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
#ifdef GSSAPI
#ifdef KRB5
-#include "auth.h"
+#include <sys/types.h>
+
+#include <stdarg.h>
+#include <string.h>
+
#include "xmalloc.h"
+#include "key.h"
+#include "hostfile.h"
+#include "auth.h"
#include "log.h"
#include "servconf.h"
+#include "buffer.h"
#include "ssh-gss.h"
extern ServerOptions options;
#ifdef HEIMDAL
-#include <krb5.h>
-#else
-#include <gssapi_krb5.h>
+# include <krb5.h>
+#elif !defined(MECHGLUE)
+# ifdef HAVE_GSSAPI_KRB5_H
+# include <gssapi_krb5.h>
+# elif HAVE_GSSAPI_GSSAPI_KRB5_H
+# include <gssapi/gssapi_krb5.h>
+# endif
#endif
static krb5_context krb_context = NULL;
+static int ssh_gssapi_krb5_init();
+static int ssh_gssapi_krb5_userok(ssh_gssapi_client *client, char *name);
+static int ssh_gssapi_krb5_localname(ssh_gssapi_client *client, char **user);
+static void ssh_gssapi_krb5_storecreds(ssh_gssapi_client *client);
+static int ssh_gssapi_krb5_updatecreds(ssh_gssapi_ccache *store,
+ ssh_gssapi_client *client);
+
+ssh_gssapi_mech gssapi_kerberos_mech = {
+ "toWM5Slw5Ew8Mqkay+al2g==",
+ "Kerberos",
+ {9, "\x2A\x86\x48\x86\xF7\x12\x01\x02\x02"},
+ NULL,
+ &ssh_gssapi_krb5_userok,
+ &ssh_gssapi_krb5_localname,
+ &ssh_gssapi_krb5_storecreds,
+ &ssh_gssapi_krb5_updatecreds
+};
/* Initialise the krb5 library, for the stuff that GSSAPI won't do */
-static int
-ssh_gssapi_krb5_init()
+static int
+ssh_gssapi_krb5_init(void)
{
krb5_error_code problem;
logit("Cannot initialize krb5 context");
return 0;
}
- krb5_init_ets(krb_context);
return 1;
}
krb5_principal princ;
OM_uint32 maj_status, min_status;
gss_cred_id_t krb5_cred_handle;
-
+ int len;
+ const char *new_ccname;
if (client->creds == NULL) {
debug("No credentials stored");
return;
}
#else
- {
- int tmpfd;
- char ccname[40];
-
- snprintf(ccname, sizeof(ccname),
- "FILE:/tmp/krb5cc_%d_XXXXXX", geteuid());
-
- if ((tmpfd = mkstemp(ccname + strlen("FILE:"))) == -1) {
- logit("mkstemp(): %.100s", strerror(errno));
- problem = errno;
- return;
- }
- if (fchmod(tmpfd, S_IRUSR | S_IWUSR) == -1) {
- logit("fchmod(): %.100s", strerror(errno));
- close(tmpfd);
- problem = errno;
- return;
- }
- close(tmpfd);
- if ((problem = krb5_cc_resolve(krb_context, ccname, &ccache))) {
- logit("krb5_cc_resolve(): %.100s",
- krb5_get_err_text(krb_context, problem));
- return;
- }
+ if ((problem = ssh_krb5_cc_gen(krb_context, &ccache))) {
+ logit("ssh_krb5_cc_gen(): %.100s",
+ krb5_get_err_text(krb_context, problem));
+ return;
}
#endif /* #ifdef HEIMDAL */
- if ((problem = krb5_parse_name(krb_context,
+ if ((problem = krb5_parse_name(krb_context,
client->exportedname.value, &princ))) {
logit("krb5_parse_name(): %.100s",
krb5_get_err_text(krb_context, problem));
return;
}
- client->store.filename = xstrdup(krb5_cc_get_name(krb_context, ccache));
+ new_ccname = krb5_cc_get_name(krb_context, ccache);
+
client->store.envvar = "KRB5CCNAME";
- client->store.envval = xstrdup(client->store.filename);
+#ifdef USE_CCAPI
+ xasprintf(&client->store.envval, "API:%s", new_ccname);
+ client->store.filename = NULL;
+#else
+ xasprintf(&client->store.envval, "FILE:%s", new_ccname);
+ client->store.filename = xstrdup(new_ccname);
+#endif
#ifdef USE_PAM
if (options.use_pam)
- do_pam_putenv(client->store.envvar,client->store.envval);
+ do_pam_putenv(client->store.envvar, client->store.envval);
#endif
krb5_cc_close(krb_context, ccache);
return;
}
-ssh_gssapi_mech gssapi_kerberos_mech = {
- "toWM5Slw5Ew8Mqkay+al2g==",
- "Kerberos",
- {9, "\x2A\x86\x48\x86\xF7\x12\x01\x02\x02"},
- NULL,
- &ssh_gssapi_krb5_userok,
- &ssh_gssapi_krb5_localname,
- &ssh_gssapi_krb5_storecreds
-};
+static int
+ssh_gssapi_krb5_updatecreds(ssh_gssapi_ccache *store,
+ ssh_gssapi_client *client)
+{
+ krb5_ccache ccache = NULL;
+ krb5_principal principal = NULL;
+ char *name = NULL;
+ krb5_error_code problem;
+ OM_uint32 maj_status, min_status;
-ssh_gssapi_mech gssapi_kerberos_mech_old = {
- "Se3H81ismmOC3OE+FwYCiQ==",
- "Kerberos",
- {9, "\x2A\x86\x48\x86\xF7\x12\x01\x02\x02"},
- &ssh_gssapi_krb5_init,
- &ssh_gssapi_krb5_userok,
- &ssh_gssapi_krb5_localname,
- &ssh_gssapi_krb5_storecreds
-};
+ if ((problem = krb5_cc_resolve(krb_context, store->envval, &ccache))) {
+ logit("krb5_cc_resolve(): %.100s",
+ krb5_get_err_text(krb_context, problem));
+ return 0;
+ }
+
+ /* Find out who the principal in this cache is */
+ if ((problem = krb5_cc_get_principal(krb_context, ccache,
+ &principal))) {
+ logit("krb5_cc_get_principal(): %.100s",
+ krb5_get_err_text(krb_context, problem));
+ krb5_cc_close(krb_context, ccache);
+ return 0;
+ }
+
+ if ((problem = krb5_unparse_name(krb_context, principal, &name))) {
+ logit("krb5_unparse_name(): %.100s",
+ krb5_get_err_text(krb_context, problem));
+ krb5_free_principal(krb_context, principal);
+ krb5_cc_close(krb_context, ccache);
+ return 0;
+ }
+
+
+ if (strcmp(name,client->exportedname.value)!=0) {
+ debug("Name in local credentials cache differs. Not storing");
+ krb5_free_principal(krb_context, principal);
+ krb5_cc_close(krb_context, ccache);
+ krb5_free_unparsed_name(krb_context, name);
+ return 0;
+ }
+ krb5_free_unparsed_name(krb_context, name);
+
+ /* Name matches, so lets get on with it! */
+
+ if ((problem = krb5_cc_initialize(krb_context, ccache, principal))) {
+ logit("krb5_cc_initialize(): %.100s",
+ krb5_get_err_text(krb_context, problem));
+ krb5_free_principal(krb_context, principal);
+ krb5_cc_close(krb_context, ccache);
+ return 0;
+ }
+
+ krb5_free_principal(krb_context, principal);
+
+ if ((maj_status = gss_krb5_copy_ccache(&min_status, client->creds,
+ ccache))) {
+ logit("gss_krb5_copy_ccache() failed. Sorry!");
+ krb5_cc_close(krb_context, ccache);
+ return 0;
+ }
+
+ return 1;
+}
#endif /* KRB5 */
andersk / gssapi-openssh.git / blobdiff