*/
/*
- * Copyright (c) 2004 Masarykova universita
+ * Copyright (c) 2004-2006 Masarykova universita
* (Masaryk University, Brno, Czech Republic)
* All rights reserved.
*
#include <stdio.h>
#include <stdarg.h>
-#define MODAUTHKERB_VERSION "5.0-rc6"
+#define MODAUTHKERB_VERSION "5.4"
+
#define MECH_NEGOTIATE "Negotiate"
+#define SERVICE_NAME "HTTP"
#include <httpd.h>
#include <http_config.h>
#include <http_request.h>
#ifdef STANDARD20_MODULE_STUFF
-#include <ap_compat.h>
#include <apr_strings.h>
#include <apr_base64.h>
+#else
+#define apr_pstrdup ap_pstrdup
+#define apr_psprintf ap_psprintf
+#define apr_pstrcat ap_pstrcat
+#define apr_pcalloc ap_pcalloc
+#define apr_table_setn ap_table_setn
+#define apr_table_add ap_table_add
+#define apr_base64_decode_len ap_base64decode_len
+#define apr_base64_decode ap_base64decode
+#define apr_base64_encode_len ap_base64encode_len
+#define apr_base64_encode ap_base64encode
+#define apr_pool_cleanup_null ap_null_cleanup
+#define apr_pool_cleanup_register ap_register_cleanup
+#endif /* STANDARD20_MODULE_STUFF */
+
+#if AP_SERVER_MAJORVERSION_NUMBER == 2 && AP_SERVER_MINORVERSION_NUMBER== 2
+#define APACHE22
+#include "mod_auth.h"
+#endif
+
+#ifdef _WIN32
+#define vsnprintf _vsnprintf
+#define snprintf _snprintf
#endif
#ifdef KRB5
# include <gssapi/gssapi_krb5.h>
# define GSS_C_NT_USER_NAME gss_nt_user_name
# define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
+# define GSS_KRB5_NT_PRINCIPAL_NAME gss_nt_krb5_name
# define krb5_get_err_text(context,code) error_message(code)
#endif
-#include "spnegokrb5.h"
+#ifndef GSSAPI_SUPPORTS_SPNEGO
+# include "spnegokrb5.h"
+#endif
#endif /* KRB5 */
#ifdef KRB4
#include <netdb.h> /* gethostbyname() */
#endif /* KRB4 */
-#ifdef WIN32
-#define vsnprintf _vsnprintf
-#define snprintf _snprintf
-#else
-/* XXX remove dependency on unistd.h ??? */
+#if HAVE_UNISTD_H
#include <unistd.h>
#endif
+#ifndef KRB5_LIB_FUNCTION
+# if defined(_WIN32)
+# define KRB5_LIB_FUNCTION _stdcall
+# else
+# define KRB5_LIB_FUNCTION
+# endif
+#endif
+
#ifdef STANDARD20_MODULE_STUFF
module AP_MODULE_DECLARE_DATA auth_kerb_module;
#else
char *krb_auth_realms;
int krb_save_credentials;
int krb_verify_kdc;
- char *krb_service_name;
+ const char *krb_service_name;
int krb_authoritative;
int krb_delegate_basic;
+#if 0
+ int krb_ssl_preauthentication;
+#endif
#ifdef KRB5
char *krb_5_keytab;
int krb_method_gssapi;
int krb_method_k5pass;
+ int krb5_do_auth_to_local;
#endif
#ifdef KRB4
char *krb_4_srvtab;
#endif
} kerb_auth_config;
+typedef struct krb5_conn_data {
+ char *authline;
+ char *user;
+ char *mech;
+ int last_return;
+} krb5_conn_data;
+
static void
set_kerb_auth_headers(request_rec *r, const kerb_auth_config *conf,
int use_krb4, int use_krb5pwd, char *negotiate_ret_value);
static const char*
-krb5_save_realms(cmd_parms *cmd, kerb_auth_config *sec, const char *arg);
+krb5_save_realms(cmd_parms *cmd, void *sec, const char *arg);
#ifdef STANDARD20_MODULE_STUFF
#define command(name, func, var, type, usage) \
AP_INIT_ ## type (name, (void*) func, \
- (void*)APR_XtOffsetOf(kerb_auth_config, var), \
+ (void*)APR_OFFSETOF(kerb_auth_config, var), \
OR_AUTHCFG | RSRC_CONF, usage)
#else
#define command(name, func, var, type, usage) \
FLAG, "Verify tickets against keytab to prevent KDC spoofing attacks."),
command("KrbServiceName", ap_set_string_slot, krb_service_name,
- TAKE1, "Service name to be used by Apache for authentication."),
+ TAKE1, "Full or partial service name to be used by Apache for authentication."),
command("KrbAuthoritative", ap_set_flag_slot, krb_authoritative,
FLAG, "Set to 'off' to allow access control to be passed along to lower modules iff the UserID is not known to this module."),
command("KrbDelegateBasic", ap_set_flag_slot, krb_delegate_basic,
FLAG, "Always offer Basic authentication regardless of KrbMethodK5Pass and pass on authentication to lower modules if Basic headers arrive."),
+#if 0
+ command("KrbEnableSSLPreauthentication", ap_set_flag_slot, krb_ssl_preauthentication,
+ FLAG, "Don't do Kerberos authentication if the user is already authenticated using SSL and her client certificate."),
+#endif
+
#ifdef KRB5
command("Krb5Keytab", ap_set_file_slot, krb_5_keytab,
TAKE1, "Location of Kerberos V5 keytab file."),
command("KrbMethodK5Passwd", ap_set_flag_slot, krb_method_k5pass,
FLAG, "Enable Kerberos V5 password authentication."),
+
+ command("KrbLocalUserMapping", ap_set_flag_slot, krb5_do_auth_to_local,
+ FLAG, "Set to 'on' to have Kerberos do auth_to_local mapping of principal names to system user names."),
#endif
#ifdef KRB4
{ NULL }
};
-#ifdef WIN32
+#ifdef _WIN32
int
mkstemp(char *template)
{
#include "mit-internals.h"
/* This is our replacement krb5_rc_store function */
-static krb5_error_code
+static krb5_error_code KRB5_LIB_FUNCTION
mod_auth_kerb_rc_store(krb5_context context, krb5_rcache rcache,
krb5_donot_replay_internal *donot_replay)
{
};
#endif
-
/***************************************************************************
Auth Configuration Initialization
***************************************************************************/
{
kerb_auth_config *rec;
- rec = (kerb_auth_config *) ap_pcalloc(p, sizeof(kerb_auth_config));
+ rec = (kerb_auth_config *) apr_pcalloc(p, sizeof(kerb_auth_config));
((kerb_auth_config *)rec)->krb_verify_kdc = 1;
- ((kerb_auth_config *)rec)->krb_service_name = "HTTP";
+ ((kerb_auth_config *)rec)->krb_service_name = NULL;
((kerb_auth_config *)rec)->krb_authoritative = 1;
((kerb_auth_config *)rec)->krb_delegate_basic = 0;
+#if 0
+ ((kerb_auth_config *)rec)->krb_ssl_preauthentication = 0;
+#endif
#ifdef KRB5
+ ((kerb_auth_config *)rec)->krb5_do_auth_to_local = 0;
((kerb_auth_config *)rec)->krb_method_k5pass = 1;
((kerb_auth_config *)rec)->krb_method_gssapi = 1;
#endif
}
static const char*
-krb5_save_realms(cmd_parms *cmd, kerb_auth_config *sec, const char *arg)
+krb5_save_realms(cmd_parms *cmd, void *vsec, const char *arg)
{
- sec->krb_auth_realms= ap_pstrdup(cmd->pool, arg);
+ kerb_auth_config *sec = (kerb_auth_config *) vsec;
+ sec->krb_auth_realms= apr_pstrdup(cmd->pool, arg);
return NULL;
}
-void log_rerror(const char *file, int line, int level, int status,
- const request_rec *r, const char *fmt, ...)
+static void
+log_rerror(const char *file, int line, int level, int status,
+ const request_rec *r, const char *fmt, ...)
{
char errstr[1024];
va_list ap;
Username/Password Validation for Krb4
***************************************************************************/
static int
-verify_krb4_user(request_rec *r, char *name, char *instance, char *realm,
- char *password, char *linstance, char *srvtab, int krb_verify_kdc)
+verify_krb4_user(request_rec *r, const char *name, const char *instance,
+ const char *realm, const char *password, const char *linstance, const char *srvtab, int krb_verify_kdc)
{
int ret;
char *phost;
return ret;
}
- ret = krb_rd_req(&ticket, linstance, phost, addr, &authdata, srvtab);
+ ret = krb_rd_req(&ticket, (char *)linstance, phost, addr, &authdata, (char *)srvtab);
if (ret) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"Cannot verify krb4 ticket: krb_rd_req() failed: %s",
const char *auth_line)
{
int ret;
- const char *sent_pw;
+ char *sent_pw;
const char *sent_name;
char *sent_instance;
char tkt_file[32];
int all_principals_unkown;
sent_pw = ap_pbase64decode(r->pool, auth_line);
- sent_name = ap_getword (r->pool, &sent_pw, ':');
-
- /* do not allow user to override realm setting of server */
- if (strchr(sent_name, '@')) {
- log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "specifying realm in user name is prohibited");
- return HTTP_UNAUTHORIZED;
- }
+ sent_name = ap_getword_nulls_nc (r->pool, (char **) &sent_pw, ':');
sent_instance = strchr(sent_name, '.');
if (sent_instance)
return HTTP_INTERNAL_SERVER_ERROR;
}
- tkt_file_p = ap_pstrdup(r->pool, tkt_file);
- ap_register_cleanup(r->pool, tkt_file_p,
- krb4_cache_cleanup, ap_null_cleanup);
-
+ tkt_file_p = apr_pstrdup(r->pool, tkt_file);
+ apr_pool_cleanup_register(r->pool, tkt_file_p, krb4_cache_cleanup,
+ apr_pool_cleanup_null);
+
krb_set_tkt_string(tkt_file);
all_principals_unkown = 1;
realm = lrealm;
}
+ /* XXX conf->krb_service_name */
ret = verify_krb4_user(r, (char *)sent_name,
(sent_instance) ? sent_instance : "",
(char *)realm, (char *)sent_pw,
goto end;
}
- user = ap_pstrdup(r->pool, sent_name);
+ user = apr_pstrdup(r->pool, sent_name);
if (sent_instance)
- user = ap_pstrcat(r->pool, user, ".", sent_instance, NULL);
- user = ap_pstrcat(r->pool, user, "@", realm, NULL);
+ user = apr_pstrcat(r->pool, user, ".", sent_instance, NULL);
+ user = apr_pstrcat(r->pool, user, "@", realm, NULL);
MK_USER = user;
MK_AUTH_TYPE = "Basic";
- ap_table_setn(r->subprocess_env, "KRBTKFILE", tkt_file_p);
+ apr_table_setn(r->subprocess_env, "KRBTKFILE", tkt_file_p);
if (!conf->krb_save_credentials)
krb4_cache_cleanup(tkt_file);
} else
keytab = ap_req_keytab;
+#ifdef HAVE_KRB5_CC_NEW_UNIQUE
+ ret = krb5_cc_new_unique(context, "MEMORY", NULL, &local_ccache);
+#else
ret = krb5_cc_resolve(context, "MEMORY:", &local_ccache);
+#endif
+
if (ret) {
log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"krb5_cc_resolve() failed when verifying KDC");
/* Inspired by krb5_verify_user from Heimdal */
static krb5_error_code
verify_krb5_user(request_rec *r, krb5_context context, krb5_principal principal,
- const char *password, const char *service, krb5_keytab keytab,
- int krb_verify_kdc, krb5_ccache *ccache)
+ const char *password, krb5_principal server,
+ krb5_keytab keytab, int krb_verify_kdc, const char *krb_service_name, krb5_ccache *ccache)
{
krb5_creds creds;
- krb5_principal server = NULL;
+ krb5_get_init_creds_opt options;
krb5_error_code ret;
krb5_ccache ret_ccache = NULL;
char *name = NULL;
+ krb5_keytab_entry entry;
+ krb5_kt_cursor cursor;
/* XXX error messages shouldn't be logged here (and in the while() loop in
* authenticate_user_krb5pwd() as weell), in order to avoid confusing log
free(name);
}
+ krb5_get_init_creds_opt_init(&options);
ret = krb5_get_init_creds_password(context, &creds, principal,
(char *)password, NULL,
- NULL, 0, NULL, NULL);
+ NULL, 0, NULL, &options);
if (ret) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"krb5_get_init_creds_password() failed: %s",
goto end;
}
- ret = krb5_sname_to_principal(context, ap_get_server_name(r), service,
- KRB5_NT_SRV_HST, &server);
- if (ret) {
- log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "krb5_sname_to_principal() failed: %s",
- krb5_get_err_text(context, ret));
- goto end;
- }
- /* XXX log_debug: lookig for <server_princ> in keytab */
-
/* XXX
{
char *realm;
}
*/
- if (krb_verify_kdc &&
+ /*if (krb_verify_kdc &&
(ret = verify_krb5_init_creds(r, context, &creds, server, keytab))) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"failed to verify krb5 credentials: %s",
krb5_get_err_text(context, ret));
goto end;
+ }*/
+
+ if (krb_verify_kdc) {
+ if (krb_service_name && strcmp(krb_service_name,"Any") == 0) {
+ ret = krb5_kt_start_seq_get(context, keytab, &cursor);
+ if(!ret) {
+ while((krb5_kt_next_entry(context, keytab, &entry, &cursor)) == 0){
+ if ((ret = verify_krb5_init_creds(r, context, &creds, entry.principal, keytab)) == 0)
+ break;
+ }
+ }
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "failed to verify krb5 credentials: %s",
+ krb5_get_err_text(context, ret));
+ krb5_kt_end_seq_get(context, keytab, &cursor);
+ krb5_kt_close(context, keytab);
+ goto end;
+ }
+ krb5_kt_end_seq_get(context, keytab, &cursor);
+ krb5_kt_close(context, keytab);
+ }
+ else {
+ if ((ret = verify_krb5_init_creds(r, context, &creds, server, keytab))) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "failed to verify krb5 credentials: %s",
+ krb5_get_err_text(context, ret));
+ goto end;
+ }
+ }
}
+#ifdef HAVE_KRB5_CC_NEW_UNIQUE
+ ret = krb5_cc_new_unique(context, "MEMORY", NULL, &ret_ccache);
+#else
ret = krb5_cc_resolve(context, "MEMORY:", &ret_ccache);
+#endif
+
if (ret) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"generating new memory ccache failed: %s",
end:
krb5_free_cred_contents(context, &creds);
- if (server)
- krb5_free_principal(context, server);
if (ret_ccache)
krb5_cc_destroy(context, ret_ccache);
int ret;
krb5_ccache tmp_ccache = NULL;
- ccname = ap_psprintf(r->pool, "FILE:%s/krb5cc_apache_XXXXXX", P_tmpdir);
+ ccname = apr_psprintf(r->pool, "FILE:%s/krb5cc_apache_XXXXXX", P_tmpdir);
fd = mkstemp(ccname + strlen("FILE:"));
if (fd < 0) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
goto end;
}
- ap_table_setn(r->subprocess_env, "KRB5CCNAME", ccname);
- ap_register_cleanup(r->pool, ccname,
- krb5_cache_cleanup, ap_null_cleanup);
+ apr_table_setn(r->subprocess_env, "KRB5CCNAME", ccname);
+ apr_pool_cleanup_register(r->pool, ccname, krb5_cache_cleanup,
+ apr_pool_cleanup_null);
*ccache = tmp_ccache;
tmp_ccache = NULL;
return OK;
}
-
-int authenticate_user_krb5pwd(request_rec *r,
- kerb_auth_config *conf,
- const char *auth_line)
+static int
+authenticate_user_krb5pwd(request_rec *r,
+ kerb_auth_config *conf,
+ const char *auth_line)
{
const char *sent_pw = NULL;
const char *sent_name = NULL;
krb5_context kcontext = NULL;
krb5_error_code code;
krb5_principal client = NULL;
+ krb5_principal server = NULL;
krb5_ccache ccache = NULL;
krb5_keytab keytab = NULL;
int ret;
}
sent_pw = ap_pbase64decode(r->pool, auth_line);
- sent_name = ap_getword (r->pool, &sent_pw, ':');
+ sent_name = ap_getword_nulls_nc (r->pool, (char **) &sent_pw, ':');
if (sent_pw == NULL || *sent_pw == '\0') {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
if (conf->krb_5_keytab)
krb5_kt_resolve(kcontext, conf->krb_5_keytab, &keytab);
+ if (conf->krb_service_name && strchr(conf->krb_service_name, '/') != NULL)
+ ret = krb5_parse_name (kcontext, conf->krb_service_name, &server);
+ else
+ ret = krb5_sname_to_principal(kcontext, ap_get_server_name(r),
+ (conf->krb_service_name) ? conf->krb_service_name : SERVICE_NAME,
+ KRB5_NT_SRV_HST, &server);
+
+ if (ret) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Error parsing server name (%s): %s",
+ (conf->krb_service_name) ? conf->krb_service_name : SERVICE_NAME,
+ krb5_get_err_text(kcontext, ret));
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+ code = krb5_unparse_name(kcontext, server, &name);
+ if (code) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "krb5_unparse_name() failed: %s",
+ krb5_get_err_text(kcontext, code));
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "Using %s as server principal for password verification", name);
+ free(name);
+ name = NULL;
+
p = strchr(sent_name, '@');
if (p) {
*p++ = '\0';
do {
name = (char *) sent_name;
if (realms && (realm = ap_getword_white(r->pool, &realms)))
- name = ap_psprintf(r->pool, "%s@%s", sent_name, realm);
+ name = apr_psprintf(r->pool, "%s@%s", sent_name, realm);
if (client) {
krb5_free_principal(kcontext, client);
continue;
}
- code = verify_krb5_user(r, kcontext, client, sent_pw,
- conf->krb_service_name,
- keytab, conf->krb_verify_kdc, &ccache);
+ code = verify_krb5_user(r, kcontext, client, sent_pw,
+ server, keytab, conf->krb_verify_kdc, conf->krb_service_name, &ccache);
if (!conf->krb_authoritative && code) {
/* if we're not authoritative, we allow authentication to pass on
* to another modules if (and only if) the user is not known to us */
ret = HTTP_UNAUTHORIZED;
goto end;
}
- MK_USER = ap_pstrdup (r->pool, name);
+ MK_USER = apr_pstrdup (r->pool, name);
MK_AUTH_TYPE = "Basic";
free(name);
ret, (MK_USER)?MK_USER:"(NULL)", (MK_AUTH_TYPE)?MK_AUTH_TYPE:"(NULL)");
if (client)
krb5_free_principal(kcontext, client);
+ if (server)
+ krb5_free_principal(kcontext, server);
if (ccache)
krb5_cc_destroy(kcontext, ccache);
if (keytab)
********************************************************************/
static const char *
-get_gss_error(MK_POOL *p, OM_uint32 err_maj, OM_uint32 err_min, char *prefix)
+get_gss_error(request_rec *r, OM_uint32 err_maj, OM_uint32 err_min, char *prefix)
{
OM_uint32 maj_stat, min_stat;
OM_uint32 msg_ctx = 0;
gss_buffer_desc status_string;
char *err_msg;
- err_msg = ap_pstrdup(p, prefix);
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "GSS-API major_status:%8.8x, minor_status:%8.8x",
+ err_maj, err_min);
+
+ err_msg = apr_pstrdup(r->pool, prefix);
do {
maj_stat = gss_display_status (&min_stat,
err_maj,
GSS_C_NO_OID,
&msg_ctx,
&status_string);
- if (GSS_ERROR(maj_stat))
- break;
- err_msg = ap_pstrcat(p, err_msg, ": ", (char*) status_string.value, NULL);
- gss_release_buffer(&min_stat, &status_string);
-
+ if (!GSS_ERROR(maj_stat)) {
+ err_msg = apr_pstrcat(r->pool, err_msg, ": ",
+ (char*) status_string.value, NULL);
+ gss_release_buffer(&min_stat, &status_string);
+ }
+ } while (!GSS_ERROR(maj_stat) && msg_ctx != 0);
+
+ msg_ctx = 0;
+ err_msg = apr_pstrcat(r->pool, err_msg, " (", NULL);
+ do {
maj_stat = gss_display_status (&min_stat,
err_min,
GSS_C_MECH_CODE,
&msg_ctx,
&status_string);
if (!GSS_ERROR(maj_stat)) {
- err_msg = ap_pstrcat(p, err_msg,
- " (", (char*) status_string.value, ")", NULL);
+ err_msg = apr_pstrcat(r->pool, err_msg, ", ",
+ (char *) status_string.value, NULL);
gss_release_buffer(&min_stat, &status_string);
}
} while (!GSS_ERROR(maj_stat) && msg_ctx != 0);
+ err_msg = apr_pstrcat(r->pool, err_msg, ")", NULL);
return err_msg;
}
if (GSS_ERROR(maj_stat)) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"Cannot store delegated credential (%s)",
- get_gss_error(r->pool, maj_stat, min_stat, "gss_krb5_copy_ccache"));
+ get_gss_error(r, maj_stat, min_stat, "gss_krb5_copy_ccache"));
goto end;
}
OM_uint32 major_status, minor_status, minor_status2;
gss_name_t server_name = GSS_C_NO_NAME;
char buf[1024];
+ int have_server_princ;
+
- snprintf(buf, sizeof(buf), "%s@%s", conf->krb_service_name,
- ap_get_server_name(r));
+ have_server_princ = conf->krb_service_name && strchr(conf->krb_service_name, '/') != NULL;
+ if (have_server_princ)
+ strncpy(buf, conf->krb_service_name, sizeof(buf));
+ else if (conf->krb_service_name && strcmp(conf->krb_service_name,"Any") == 0) {
+ *server_creds = GSS_C_NO_CREDENTIAL;
+ return 0;
+ }
+ else
+ snprintf(buf, sizeof(buf), "%s@%s",
+ (conf->krb_service_name) ? conf->krb_service_name : SERVICE_NAME,
+ ap_get_server_name(r));
token.value = buf;
token.length = strlen(buf) + 1;
major_status = gss_import_name(&minor_status, &token,
- GSS_C_NT_HOSTBASED_SERVICE,
+ (have_server_princ) ? (gss_OID) GSS_KRB5_NT_PRINCIPAL_NAME : (gss_OID) GSS_C_NT_HOSTBASED_SERVICE,
&server_name);
memset(&token, 0, sizeof(token));
if (GSS_ERROR(major_status)) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "%s", get_gss_error(r->pool, major_status, minor_status,
+ "%s", get_gss_error(r, major_status, minor_status,
"gss_import_name() failed"));
return HTTP_INTERNAL_SERVER_ERROR;
}
/* Perhaps we could just ignore this error but it's safer to give up now,
I think */
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "%s", get_gss_error(r->pool, major_status, minor_status,
+ "%s", get_gss_error(r, major_status, minor_status,
"gss_display_name() failed"));
return HTTP_INTERNAL_SERVER_ERROR;
}
gss_release_name(&minor_status2, &server_name);
if (GSS_ERROR(major_status)) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "%s", get_gss_error(r->pool, major_status, minor_status,
+ "%s", get_gss_error(r, major_status, minor_status,
"gss_acquire_cred() failed"));
return HTTP_INTERNAL_SERVER_ERROR;
}
{
krb5_gss_cred_id_t gss_creds = (krb5_gss_cred_id_t) *server_creds;
- if (gss_creds && gss_creds->rcache && gss_creds->rcache->ops &&
- gss_creds->rcache->ops->type &&
- memcmp(gss_creds->rcache->ops->type, "dfl", 3) == 0)
+ /* First we try to verify we are linked with 1.3.x to prevent from
+ crashing when linked with 1.4.x */
+ if (gss_creds && (gss_creds->usage == GSS_C_ACCEPT)) {
+ if (gss_creds->rcache && gss_creds->rcache->ops &&
+ gss_creds->rcache->ops->type &&
+ memcmp(gss_creds->rcache->ops->type, "dfl", 3) == 0)
/* Override the rcache operations */
gss_creds->rcache->ops = &mod_auth_kerb_rc_ops;
+ }
}
#endif
int ret;
gss_name_t client_name = GSS_C_NO_NAME;
gss_cred_id_t delegated_cred = GSS_C_NO_CREDENTIAL;
- OM_uint32
- (*accept_sec_token)(OM_uint32 *, gss_ctx_id_t *, const gss_cred_id_t,
+ OM_uint32 (KRB5_LIB_FUNCTION *accept_sec_token)
+ (OM_uint32 *, gss_ctx_id_t *, const gss_cred_id_t,
const gss_buffer_t, const gss_channel_bindings_t,
gss_name_t *, gss_OID *, gss_buffer_t, OM_uint32 *,
OM_uint32 *, gss_cred_id_t *);
gss_OID_desc spnego_oid;
gss_ctx_id_t context = GSS_C_NO_CONTEXT;
gss_cred_id_t server_creds = GSS_C_NO_CREDENTIAL;
+ OM_uint32 ret_flags = 0;
*negotiate_ret_value = "\0";
goto end;
}
- input_token.length = ap_base64decode_len(auth_param) + 1;
- input_token.value = ap_pcalloc(r->connection->pool, input_token.length);
+ input_token.length = apr_base64_decode_len(auth_param) + 1;
+ input_token.value = apr_pcalloc(r->connection->pool, input_token.length);
if (input_token.value == NULL) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"ap_pcalloc() failed (not enough memory)");
ret = HTTP_INTERNAL_SERVER_ERROR;
goto end;
}
- input_token.length = ap_base64decode(input_token.value, auth_param);
+ input_token.length = apr_base64_decode(input_token.value, auth_param);
+#ifdef GSSAPI_SUPPORTS_SPNEGO
+ accept_sec_token = gss_accept_sec_context;
+#else
accept_sec_token = (cmp_gss_type(&input_token, &spnego_oid) == 0) ?
gss_accept_sec_context_spnego : gss_accept_sec_context;
+#endif
- /* pridat: Read client Negotiate data of length XXX, prefix YYY */
- log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "Verifying client data using %s",
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "Verifying client data using KRB5 GSS-API %s",
(accept_sec_token == gss_accept_sec_context)
- ? "KRB5 GSS-API"
- : "SPNEGO GSS-API");
+ ? ""
+ : "with our SPNEGO lib");
major_status = accept_sec_token(&minor_status,
&context,
&client_name,
NULL,
&output_token,
- NULL,
+ &ret_flags,
NULL,
&delegated_cred);
log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
- "Verification returned code %d", major_status);
+ "Client %s us their credential",
+ (ret_flags & GSS_C_DELEG_FLAG) ? "delegated" : "didn't delegate");
if (output_token.length) {
char *token = NULL;
size_t len;
- len = ap_base64encode_len(output_token.length) + 1;
- token = ap_pcalloc(r->connection->pool, len + 1);
+ len = apr_base64_encode_len(output_token.length) + 1;
+ token = apr_pcalloc(r->connection->pool, len + 1);
if (token == NULL) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"ap_pcalloc() failed (not enough memory)");
gss_release_buffer(&minor_status2, &output_token);
goto end;
}
- ap_base64encode(token, output_token.value, output_token.length);
+ apr_base64_encode(token, output_token.value, output_token.length);
token[len] = '\0';
*negotiate_ret_value = token;
log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
"GSS-API token of length %d bytes will be sent back",
output_token.length);
gss_release_buffer(&minor_status2, &output_token);
+ set_kerb_auth_headers(r, conf, 0, 0, *negotiate_ret_value);
}
if (GSS_ERROR(major_status)) {
"Warning: received token seems to be NTLM, which isn't supported by the Kerberos module. Check your IE configuration.");
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "%s", get_gss_error(r->pool, major_status, minor_status,
+ "%s", get_gss_error(r, major_status, minor_status,
"gss_accept_sec_context() failed"));
/* Don't offer the Negotiate method again if call to GSS layer failed */
*negotiate_ret_value = NULL;
gss_release_name(&minor_status, &client_name);
if (GSS_ERROR(major_status)) {
log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
- "%s", get_gss_error(r->pool, major_status, minor_status,
- "gss_export_name() failed"));
+ "%s", get_gss_error(r, major_status, minor_status,
+ "gss_display_name() failed"));
ret = HTTP_INTERNAL_SERVER_ERROR;
goto end;
}
MK_AUTH_TYPE = MECH_NEGOTIATE;
- MK_USER = ap_pstrdup(r->pool, output_token.value);
+ MK_USER = apr_pstrdup(r->pool, output_token.value);
if (conf->krb_save_credentials && delegated_cred != GSS_C_NO_CREDENTIAL)
store_gss_creds(r, conf, (char *)output_token.value, delegated_cred);
-
- if (*negotiate_ret_value)
- set_kerb_auth_headers(r, conf, 0, 0, *negotiate_ret_value);
-
+
gss_release_buffer(&minor_status, &output_token);
ret = OK;
return ret;
}
-#endif /* KRB5 */
static int
-already_succeeded(request_rec *r)
+do_krb5_an_to_ln(request_rec *r) {
+ krb5_error_code code;
+ int ret = HTTP_INTERNAL_SERVER_ERROR;
+ char *MK_USER_LNAME = NULL;
+ krb5_context kcontext = NULL;
+ krb5_principal client = NULL;
+
+ code = krb5_init_context(&kcontext);
+ if (code) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Cannot initialize Kerberos5 context (%d)", code);
+ goto end;
+ }
+
+ code = krb5_parse_name(kcontext, MK_USER, &client);
+ if (code) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "krb5_parse_name() failed: %s",
+ krb5_get_err_text(kcontext, code));
+ goto end;
+ }
+ MK_USER_LNAME = apr_pcalloc(r->pool, strlen(MK_USER)+1);
+ if (MK_USER_LNAME == NULL) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "ap_pcalloc() failed (not enough memory)");
+ goto end;
+ }
+ code = krb5_aname_to_localname(kcontext, client, strlen(MK_USER), MK_USER_LNAME);
+ if (code) {
+ if (code != KRB5_LNAME_NOTRANS) {
+ log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "krb5_aname_to_localname() failed: %s",
+ krb5_get_err_text(kcontext, code));
+
+ }
+ else {
+ log_rerror(APLOG_MARK, APLOG_NOTICE, 0, r,
+ "krb5_aname_to_localname() found no "
+ "mapping for principal %s",
+ MK_USER);
+ }
+ }
+ else {
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "kerb_authenticate_a_name_to_local_name %s -> %s",
+ (MK_USER)?MK_USER:"(NULL)", (MK_USER_LNAME)?MK_USER_LNAME:"(NULL)");
+ MK_USER = apr_pstrdup(r->pool, MK_USER_LNAME);
+ ret = OK;
+ }
+ end:
+ if (client)
+ krb5_free_principal(kcontext, client);
+ if (kcontext)
+ krb5_free_context(kcontext);
+ return ret;
+}
+
+
+#endif /* KRB5 */
+
+static krb5_conn_data *
+already_authorized(request_rec *r, char *auth_line)
{
- if (ap_is_initial_req(r) || MK_AUTH_TYPE == NULL)
- return 0;
- if (strcmp(MK_AUTH_TYPE, MECH_NEGOTIATE) ||
- (strcmp(MK_AUTH_TYPE, "Basic") && strchr(MK_USER, '@')))
- return 1;
- return 0;
+ krb5_conn_data *conn_data;
+ char keyname[1024];
+
+ snprintf(keyname, sizeof(keyname) - 1,
+ "mod_auth_kerb::connection::%s::%ld", r->connection->remote_ip,
+ r->connection->id);
+
+ if (apr_pool_userdata_get((void**)&conn_data, keyname, r->connection->pool) != 0)
+ return NULL;
+
+ if(conn_data) {
+ if(strcmp(conn_data->authline, auth_line) == 0) {
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, "matched previous auth request");
+ return conn_data;
+ }
+ }
+ return NULL;
+}
+
+static void
+save_authorized(request_rec *r, char *auth_line, const char *auth_type, int ret) {
+ krb5_conn_data *prevauth;
+ prevauth = (krb5_conn_data *)apr_palloc(r->connection->pool, sizeof(krb5_conn_data));
+
+ char keyname[1024];
+
+ prevauth->user = apr_pstrdup(r->connection->pool, MK_USER);
+ prevauth->authline = apr_pstrdup(r->connection->pool, auth_line);
+ prevauth->mech = apr_pstrdup(r->connection->pool, auth_type);
+ prevauth->last_return = ret;
+
+ snprintf(keyname, sizeof(keyname) - 1,
+ "mod_auth_kerb::connection::%s::%ld",
+ r->connection->remote_ip, r->connection->id);
+ apr_pool_userdata_set(prevauth, keyname, NULL, r->connection->pool);
}
static void
#ifdef KRB5
if (negotiate_ret_value != NULL && conf->krb_method_gssapi) {
negoauth_param = (*negotiate_ret_value == '\0') ? MECH_NEGOTIATE :
- ap_pstrcat(r->pool, MECH_NEGOTIATE " ", negotiate_ret_value, NULL);
- ap_table_add(r->err_headers_out, header_name, negoauth_param);
+ apr_pstrcat(r->pool, MECH_NEGOTIATE " ", negotiate_ret_value, NULL);
+ apr_table_add(r->err_headers_out, header_name, negoauth_param);
}
if ((use_krb5pwd && conf->krb_method_k5pass) || conf->krb_delegate_basic) {
- ap_table_add(r->err_headers_out, header_name,
- ap_pstrcat(r->pool, "Basic realm=\"", auth_name, "\"", NULL));
+ apr_table_add(r->err_headers_out, header_name,
+ apr_pstrcat(r->pool, "Basic realm=\"", auth_name, "\"", NULL));
set_basic = 1;
}
#endif
#ifdef KRB4
if (!set_basic &&
((use_krb4 && conf->krb_method_k4pass) || conf->krb_delegate_basic))
- ap_table_add(r->err_headers_out, header_name,
- ap_pstrcat(r->pool, "Basic realm=\"", auth_name, "\"", NULL));
+ apr_table_add(r->err_headers_out, header_name,
+ apr_pstrcat(r->pool, "Basic realm=\"", auth_name, "\"", NULL));
#endif
}
-int kerb_authenticate_user(request_rec *r)
+static int
+authenticate_user(request_rec *r, char *auth_line, const char *type, int use_krb4, int use_krb5)
{
- kerb_auth_config *conf =
- (kerb_auth_config *) ap_get_module_config(r->per_dir_config,
- &auth_kerb_module);
- const char *auth_type = NULL;
- const char *auth_line = NULL;
- const char *type = NULL;
- int use_krb5 = 0, use_krb4 = 0;
int ret;
- static int last_return = HTTP_UNAUTHORIZED;
+ krb5_conn_data *prevauth = NULL;
+ kerb_auth_config *conf =
+ (kerb_auth_config *) ap_get_module_config(r->per_dir_config,
+ &auth_kerb_module);
char *negotiate_ret_value = NULL;
-
- /* get the type specified in .htaccess */
- type = ap_auth_type(r);
-
- log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
- "kerb_authenticate_user entered with user %s and auth_type %s",
- (MK_USER)?MK_USER:"(NULL)",type?type:"(NULL)");
-
- if (type && strcasecmp(type, "Kerberos") == 0)
- use_krb5 = use_krb4 = 1;
- else if(type && strcasecmp(type, "KerberosV5") == 0)
- use_krb5 = 1;
- else if(type && strcasecmp(type, "KerberosV4") == 0)
- use_krb4 = 1;
- else
- return DECLINED;
-
- /* get what the user sent us in the HTTP header */
- auth_line = MK_TABLE_GET(r->headers_in, (r->proxyreq == PROXYREQ_PROXY)
- ? "Proxy-Authorization"
- : "Authorization");
+ const char *auth_type = NULL;
+
if (!auth_line) {
set_kerb_auth_headers(r, conf, use_krb4, use_krb5,
(use_krb5) ? "\0" : NULL);
return HTTP_UNAUTHORIZED;
}
- auth_type = ap_getword_white(r->pool, &auth_line);
+ auth_type = ap_getword_white(r->pool, (const char **)&auth_line);
/* If we are delegating Basic to other modules, DECLINE the request */
if (conf->krb_delegate_basic &&
#endif
(strcasecmp(auth_type, "Basic") == 0))
return DECLINED;
-
- if (already_succeeded(r))
- return last_return;
-
- ret = HTTP_UNAUTHORIZED;
+ if ((prevauth = already_authorized(r, auth_line)) == NULL) {
+ ret = HTTP_UNAUTHORIZED;
#ifdef KRB5
if (use_krb5 && conf->krb_method_gssapi &&
strcasecmp(auth_type, MECH_NEGOTIATE) == 0) {
ret = authenticate_user_gss(r, conf, auth_line, &negotiate_ret_value);
- } else if (use_krb5 && conf->krb_method_k5pass &&
- strcasecmp(auth_type, "Basic") == 0) {
+ } else if (use_krb5 && (conf->krb_method_k5pass || strcasecmp(type, "Basic"))){
ret = authenticate_user_krb5pwd(r, conf, auth_line);
}
#endif
#ifdef KRB4
- if (ret == HTTP_UNAUTHORIZED && use_krb4 && conf->krb_method_k4pass &&
- strcasecmp(auth_type, "Basic") == 0)
+ if (ret == HTTP_UNAUTHORIZED && use_krb4 && (conf->krb_method_k4pass || strcasecmp(type, "Basic")))
ret = authenticate_user_krb4pwd(r, conf, auth_line);
#endif
- if (ret == HTTP_UNAUTHORIZED)
- set_kerb_auth_headers(r, conf, use_krb4, use_krb5, negotiate_ret_value);
+ if (ret == HTTP_UNAUTHORIZED)
+ set_kerb_auth_headers(r, conf, use_krb4, use_krb5, negotiate_ret_value);
- /* XXX log_debug: if ret==OK, log(user XY authenticated) */
+ } else {
+ ret = prevauth->last_return;
+ MK_USER = prevauth->user;
+ MK_AUTH_TYPE = prevauth->mech;
+ }
+
+ /*
+ * save who was auth'd, if it's not already stashed.
+ */
+ if(!prevauth) {
+ save_authorized(r, auth_line, auth_type, ret);
+ }
- last_return = ret;
+ if (ret == OK && conf->krb5_do_auth_to_local) {
+ ret = do_krb5_an_to_ln(r);
+ }
return ret;
}
+static authn_status authn_krb_password(request_rec *r, const char *user,
+ const char *password)
+{
+ char *auth_line = NULL;
+ int ret;
+ const char *type = NULL;
+
+ type = ap_auth_type(r);
+ auth_line = ap_pbase64encode (r->pool, apr_psprintf(r->pool, "%s:%s", user, password));
+ auth_line = apr_psprintf(r->pool, "Basic %s", auth_line);
+
+ ret = authenticate_user(r, auth_line, type, 1, 1);
+
+ if (ret == OK) return AUTH_GRANTED;
+ else return AUTH_USER_NOT_FOUND;
+}
+
+static int
+kerb_authenticate_user(request_rec *r)
+{
+ kerb_auth_config *conf =
+ (kerb_auth_config *) ap_get_module_config(r->per_dir_config,
+ &auth_kerb_module);
+ char *auth_line = NULL;
+ int ret, use_krb4 = 0, use_krb5 = 0;
+ const char *type = NULL;
+
+ /* get the type specified in .htaccess */
+ type = ap_auth_type(r);
+
+ log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "kerb_authenticate_user entered with user %s and auth_type %s",
+ (MK_USER)?MK_USER:"(NULL)",type?type:"(NULL)");
+
+ if (type && strcasecmp(type, "Kerberos") == 0)
+ use_krb5 = use_krb4 = 1;
+ else if(type && strcasecmp(type, "KerberosV5") == 0)
+ use_krb5 = 1;
+ else if(type && strcasecmp(type, "KerberosV4") == 0)
+ use_krb4 = 1;
+ else
+ return DECLINED;
+
+#if 0
+ if (conf->krb_ssl_preauthentication) {
+ const char *ssl_client_verify = ssl_var_lookup(r->pool, r->server,
+ r->connection, r, "SSL_CLIENT_VERIFY");
+
+ if (ssl_client_verify && strcmp(ssl_client_verify, "SUCCESS") == 0)
+ return OK;
+ }
+#endif
+
+ /* get what the user sent us in the HTTP header */
+ auth_line = (char *)MK_TABLE_GET(r->headers_in, (r->proxyreq == PROXYREQ_PROXY)
+ ? "Proxy-Authorization"
+ : "Authorization");
+ ret = authenticate_user(r, auth_line, type, use_krb4, use_krb5);
+
+ return ret;
+}
+
+int
+have_rcache_type(const char *type)
+{
+ krb5_error_code ret;
+ krb5_context context;
+ krb5_rcache id = NULL;
+ int found;
+
+ ret = krb5_init_context(&context);
+ if (ret)
+ return 0;
+
+ ret = krb5_rc_resolve_full(context, &id, "none:");
+ found = (ret == 0);
+
+ if (ret == 0)
+ krb5_rc_destroy(context, id);
+ krb5_free_context(context);
+
+ return found;
+}
/***************************************************************************
Module Setup/Configuration
***************************************************************************/
#ifndef STANDARD20_MODULE_STUFF
+static void
+kerb_module_init(server_rec *dummy, pool *p)
+{
+#ifndef HEIMDAL
+ /* Suppress the MIT replay cache. Requires MIT Kerberos 1.4.0 or later.
+ 1.3.x are covered by the hack overiding the replay calls */
+ if (getenv("KRB5RCACHETYPE") == NULL && have_rcache_type("none"))
+ putenv(strdup("KRB5RCACHETYPE=none"));
+#endif
+}
+
module MODULE_VAR_EXPORT auth_kerb_module = {
STANDARD_MODULE_STUFF,
- NULL, /* module initializer */
+ kerb_module_init, /* module initializer */
kerb_dir_create_config, /* per-directory config creator */
NULL, /* per-directory config merger */
NULL, /* per-server config creator */
apr_pool_t *ptemp, server_rec *s)
{
ap_add_version_component(p, "mod_auth_kerb/" MODAUTHKERB_VERSION);
+#ifndef HEIMDAL
+ /* Suppress the MIT replay cache. Requires MIT Kerberos 1.4.0 or later.
+ 1.3.x are covered by the hack overiding the replay calls */
+ if (getenv("KRB5RCACHETYPE") == NULL && have_rcache_type("none"))
+ putenv(strdup("KRB5RCACHETYPE=none"));
+#endif
+
return OK;
}
-void kerb_register_hooks(apr_pool_t *p)
+static void
+kerb_register_hooks(apr_pool_t *p)
{
+#ifdef APACHE22
+ static const authn_provider authn_krb_provider = {
+ &authn_krb_password,
+ NULL
+ };
+
+ ap_register_provider(p, AUTHN_PROVIDER_GROUP, "kerberos", "0", &authn_krb_provider);
+#endif
ap_hook_post_config(kerb_init_handler, NULL, NULL, APR_HOOK_MIDDLE);
ap_hook_check_user_id(kerb_authenticate_user, NULL, NULL, APR_HOOK_MIDDLE);
}
projects / mod_auth_kerb.cvs / .git / blobdiff