/***************************************************************************
Included Headers And Module Declaration
***************************************************************************/
+#ident "$Id$"
+
#ifdef APXS1
#include "httpd.h"
#include "http_config.h"
#ifdef KRB5
#include <krb5.h>
+#include <gssapi.h>
#endif /* KRB5 */
#ifdef KRB4
#define MK_TABLE_TYPE table
#define MK_PSTRDUP ap_pstrdup
#define MK_PROXY STD_PROXY
-#define MK_RERROR_LEVEL ""
#define MK_USER r->connection->user
#define MK_AUTH_TYPE r->connection->ap_auth_type
#define MK_ARRAY_HEADER array_header
#define MK_TABLE_TYPE apr_table_t
#define MK_PSTRDUP apr_pstrdup
#define MK_PROXY PROXYREQ_PROXY
-#define MK_RERROR_LEVEL "0, "
#define MK_USER r->user
#define MK_AUTH_TYPE r->ap_auth_type
#define MK_ARRAY_HEADER apr_array_header_t
#endif /* KRB5 */
int krb_save_credentials;
char *krb_tmp_dir;
+ char *service_name;
} kerb_auth_config;
+typedef struct {
+ gss_ctx_id_t context;
+ gss_cred_id_t server_creds;
+} gss_connection_t;
+
+static gss_connection_t *gss_connection = NULL;
+
+static void
+cleanup_gss_connection(void *data)
+{
+ OM_uint32 minor_status;
+ gss_connection_t *gss_conn = (gss_connection_t *)data;
+
+ if (data == NULL)
+ return;
+ if (gss_conn->context != GSS_C_NO_CONTEXT)
+ gss_delete_sec_context(&minor_status, &gss_conn->context,
+ GSS_C_NO_BUFFER);
+ if (gss_conn->server_creds != GSS_C_NO_CREDENTIAL)
+ gss_release_cred(&minor_status, &gss_conn->server_creds);
+}
const char *arg)
{
int offset = (int) (long) cmd->info;
- if
#ifdef KRB5
- (!strncasecmp(arg, "v5", 2))
+ if (!strncasecmp(arg, "v5", 2))
*(char **) ((char *)struct_ptr + offset) = MK_PSTRDUP(cmd->pool, "KerberosV5");
- else if
+ else
#endif /* KRB5 */
#ifdef KRB4
- (!strncasecmp(arg, "v4", 2))
+ if (!strncasecmp(arg, "v4", 2))
*(char **) ((char *)struct_ptr + offset) = MK_PSTRDUP(cmd->pool, "KerberosV4");
+ else
#endif /* KRB4 */
- else if
- (!strncasecmp(arg, "dualv5v4", 8))
+ if (!strncasecmp(arg, "dualv5v4", 8))
*(char **) ((char *)struct_ptr + offset) = MK_PSTRDUP(cmd->pool, "KerberosDualV5V4");
else if
(!strncasecmp(arg, "dualv4v5", 8))
"KrbTmpdir",
ap_set_string_slot,
(void*)XtOffsetOf(kerb_auth_config, krb_tmp_dir),
- OR_AUTHCFG,
+ RSRC_CONF & ACCESS_CONF,
TAKE1,
"Path to store ticket files and such in."
},
"KrbTmpdir",
ap_set_string_slot,
(void*)APR_XtOffsetOf(kerb_auth_config, krb_tmp_dir),
- OR_AUTHCFG,
+ RSRC_CONF & ACCESS_CONF,
"Path to store ticket files and such in."
),
#endif /* APXS1 */
+#ifndef HEIMDAL
+krb5_error_code
+krb5_verify_user(krb5_context context, krb5_principal principal,
+ krb5_ccache ccache, const char *password, krb5_boolean secure,
+ const char *service)
+{
+ int problem;
+ krb5_creds my_creds;
+ krb5_data tgtname = {
+ 0,
+ KRB5_TGS_NAME_SIZE,
+ KRB5_TGS_NAME
+ }
+
+ memset((char *)&my_creds, 0, sizeof(my_creds));
+ my_creds.client = principal;
+
+ if (krb5_build_principal_ext(kcontext, &server,
+ krb5_princ_realm(kcontext, me)->length,
+ krb5_princ_realm(kcontext, me)->data,
+ tgtname.length, tgtname.data,
+ krb5_princ_realm(kcontext, me)->length,
+ krb5_princ_realm(kcontext, me)->data,
+ 0)) {
+ return ret;
+ }
+
+ my_creds.server = server;
+ if (krb5_timeofday(kcontext, &now))
+ return -1;
+
+ my_creds.times.starttime = 0;
+ /* XXX
+ my_creds.times.endtime = now + lifetime;
+ my_creds.times.renew_till = now + renewal;
+ */
+
+ ret = krb5_get_in_tkt_with_password(kcontext, options, 0, NULL, 0,
+ pass, ccache, &my_creds, 0);
+ if (ret) {
+ return ret;
+ }
+
+ return 0;
+}
+#endif
/***************************************************************************
Username/Password Validation
***************************************************************************/
#ifdef KRB5
-int kerb5_password_validate(const char *user, const char *pass) {
+int kerb5_password_validate(request_rec *r, const char *user, const char *pass)
+{
+ kerb_auth_config *conf =
+ (kerb_auth_config *)ap_get_module_config(r->per_dir_config,
+ &kerb_auth_module);
int ret;
krb5_context kcontext;
krb5_principal server, me;
krb5_creds my_creds;
krb5_timestamp now;
- krb5_deltat lifetime = 0;
+ krb5_ccache ccache = NULL;
+ krb5_deltat lifetime = 300; /* 5 minutes */
+ krb5_deltat renewal = 0;
+ krb5_flags options = 0;
krb5_data tgtname = {
+#ifndef HEIMDAL
0,
+#endif
KRB5_TGS_NAME_SIZE,
KRB5_TGS_NAME
};
+ char *c, ccname[MAX_STRING_LEN];
if (krb5_init_context(&kcontext))
return 0;
- memset((char *)&my_creds, 0, sizeof(my_creds));
- if(krb5_parse_name(kcontext, user, &me))
- return 0;
- my_creds.client = me;
+ if (conf->krb_forwardable) {
+ options |= KDC_OPT_FORWARDABLE;
+ }
- if (krb5_build_principal_ext(kcontext, &server,
- krb5_princ_realm(kcontext, me)->length,
- krb5_princ_realm(kcontext, me)->data,
- tgtname.length, tgtname.data,
- krb5_princ_realm(kcontext, me)->length,
- krb5_princ_realm(kcontext, me)->data,
- 0)) {
- return 0;
+ if (conf->krb_renewable) {
+ options |= KDC_OPT_RENEWABLE;
+ renewal = 86400; /* 24 hours */
}
- my_creds.server = server;
- if (krb5_timeofday(kcontext, &now))
- return 0;
- my_creds.times.starttime = 0;
- my_creds.times.endtime = now + lifetime;
- my_creds.times.renew_till = 0;
- ret = krb5_get_in_tkt_with_password(kcontext, 0, 0, NULL, 0,
- pass, NULL, &my_creds, 0);
- if (ret) {
- return 0;
+ if (conf->krb_lifetime) {
+ lifetime = atoi(conf->krb_lifetime);
}
- krb5_free_cred_contents(kcontext, &my_creds);
+ code = krb5_cc_gen_new(kcontext, &krb5_mcc_ops, &ccache);
+ if (code) {
+ snprintf(errstr, sizeof(errstr), "krb5_cc_gen_new(): %.100s",
+ krb5_get_err_text(kcontext, code));
+ ap_log_reason (errstr, r->uri, r);
+ ret = SERVER_ERROR;
+ goto end;
+ }
+
+ realms = conf->krb5_auth_realm;
+ do {
+ code = 0;
+ if (realms) {
+ code = krb5_set_default_realm(kcontext,
+ ap_getword_white(r->pool, &realms));
+ if (code)
+ continue;
+ }
+
+ code = krb5_parse_name(kcontext, r->connection->user, &princ);
+ if (code)
+ continue;
+
+ code = krb5_verify_user(kcontext, princ, ccache, sent_pw,
+ 1, "khttp");
+ if (code == 0)
+ break;
+
+ /* ap_getword_white() used above shifts the parameter, so it's not
+ needed to touch the realms variable */
+ } while (realms && *realms);
+
+ memset((char *)pass, 0, strlen(pass));
+
+ if (code) {
+ snprintf(errstr, sizeof(errstr), "Verifying krb5 password failed: %s",
+ krb5_get_err_text(kcontext, code));
+ ap_log_reason (errstr, r->uri, r);
+ ret = HTTP_UNAUTHORIZED;
+ return 0;
+ }
+
+ if (conf->krb_save_credentials) {
+ sprintf(ccname, "FILE:%s/k5cc_ap_%s",
+ conf->krb_tmp_dir ? conf->krb_tmp_dir : "/tmp",
+ MK_USER);
+
+ for (c = ccname + strlen(conf->krb_tmp_dir ? conf->krb_tmp_dir : "/tmp") + 1; *c; c++) {
+ if (*c == '/')
+ *c = '.';
+ }
+
+ ap_table_setn(r->subprocess_env, "KRB5CCNAME", ccname);
+ if (krb5_cc_set_default_name(kcontext, ccname)) {
+ return 0;
+ }
+ unlink(ccname+strlen("FILE:"));
+
+ if (krb5_cc_resolve(kcontext, ccname, &ccache))
+ return 0;
+
+ problem = krb5_cc_get_principal(krb_ctx, mem_ccache, &me);
+
+ if (krb5_cc_initialize(kcontext, ccache, me))
+ return 0;
+
+ problem = krb5_cc_copy_cache(krb_ctx, delegated_cred, ccache);
+ if (problem) {
+ return 0;
+ }
+
+ krb5_cc_close(krb_ctx, ccache);
+ }
return 1;
}
#endif /* KRB5 */
#ifdef KRB4
-int kerb4_password_validate(const char *user, const char *pass) {
+int kerb4_password_validate(request_rec *r, const char *user, const char *pass)
+{
+ kerb_auth_config *conf =
+ (kerb_auth_config *)ap_get_module_config(r->per_dir_config,
+ &kerb_auth_module);
int ret;
- char realm[REALM_SZ];
-
- ret = krb_get_lrealm(realm, 1);
- if (ret != KSUCCESS)
+ int lifetime = DEFAULT_TKT_LIFE;
+ char *c, *tfname;
+ char *username = NULL;
+ char *instance = NULL;
+ char *realm = NULL;
+
+ username = (char *)ap_pstrdup(r->pool, user);
+ if (!username) {
return 0;
+ }
+
+ instance = strchr(username, '.');
+ if (instance) {
+ *instance++ = '\0';
+ }
+ else {
+ instance = "";
+ }
+
+ realm = strchr(username, '@');
+ if (realm) {
+ *realm++ = '\0';
+ }
+ else {
+ realm = "";
+ }
- ret = krb_get_pw_in_tkt((char *)user, "", realm, "krbtgt", realm,
- DEFAULT_TKT_LIFE, (char *)pass);
+ if (conf->krb_lifetime) {
+ lifetime = atoi(conf->krb_lifetime);
+ }
+
+ if (conf->krb_force_instance) {
+ instance = conf->krb_force_instance;
+ }
+
+ if (conf->krb_save_credentials) {
+ tfname = (char *)malloc(sizeof(char) * MAX_STRING_LEN);
+ sprintf(tfname, "%s/k5cc_ap_%s",
+ conf->krb_tmp_dir ? conf->krb_tmp_dir : "/tmp",
+ MK_USER);
+
+ if (!strcmp(instance, "")) {
+ tfname = strcat(tfname, ".");
+ tfname = strcat(tfname, instance);
+ }
+
+ if (!strcmp(realm, "")) {
+ tfname = strcat(tfname, ".");
+ tfname = strcat(tfname, realm);
+ }
+
+ for (c = tfname + strlen(conf->krb_tmp_dir ? conf->krb_tmp_dir :
+ "/tmp") + 1; *c; c++) {
+ if (*c == '/')
+ *c = '.';
+ }
+
+ krb_set_tkt_string(tfname);
+ }
+
+ if (!strcmp(realm, "")) {
+ realm = (char *)malloc(sizeof(char) * (REALM_SZ + 1));
+ ret = krb_get_lrealm(realm, 1);
+ if (ret != KSUCCESS)
+ return 0;
+ }
+
+ ret = krb_get_pw_in_tkt((char *)user, instance, realm, "krbtgt", realm,
+ lifetime, (char *)pass);
switch (ret) {
case INTK_OK:
case INTK_W_NOTALL:
}
#endif /* KRB4 */
+static int
+get_gss_creds(request_rec *r,
+ kerb_auth_config *conf,
+ gss_cred_id_t *server_creds)
+{
+ int ret = 0;
+ gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
+ OM_uint32 major_status, minor_status;
+ gss_name_t server_name = GSS_C_NO_NAME;
+
+ if (conf->service_name) {
+ input_token.value = conf->service_name;
+ input_token.length = strlen(conf->service_name) + 1;
+ }
+ else {
+ input_token.value = "khttp";
+ input_token.length = 6;
+ }
+ major_status = gss_import_name(&minor_status, &input_token,
+ (conf->service_name) ?
+ GSS_C_NT_USER_NAME : GSS_C_NT_HOSTBASED_SERVICE,
+ &server_name);
+ if (GSS_ERROR(major_status)) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "%s", get_gss_error(r->pool, minor_status,
+ "gss_import_name() failed"));
+ ret = SERVER_ERROR;
+ goto fail;
+ }
+
+#ifdef KRB5
+ if (conf->krb_5_keytab)
+ setenv("KRB5_KTNAME", conf->krb_5_keytab, 1);
+#endif
+ major_status = gss_acquire_cred(&minor_status, server_name, GSS_C_INDEFINITE,
+ GSS_C_NO_OID_SET, GSS_C_ACCEPT,
+ server_creds, NULL, NULL);
+#ifdef KRB5
+ if (conf->krb_5_keytab)
+ unsetenv("KRB5_KTNAME");
+#endif
+ if (GSS_ERROR(major_status)) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "%s", get_gss_error(r->pool, minor_status,
+ "gss_acquire_cred() failed"));
+ ret = SERVER_ERROR;
+ goto fail;
+ }
+
+ return 0;
+
+fail:
+ /* XXX cleanup */
+
+ return ret;
+}
+
+static int
+negotiate_authenticate_user(request_rec *r,
+ kerb_auth_config *conf,
+ const char *auth_line)
+{
+ OM_uint32 major_status, minor_status, minor_status2;
+ gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
+ gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
+ const char *auth_param = NULL;
+ krb5_context krb_ctx = NULL;
+ int ret;
+ gss_name_t client_name = GSS_C_NO_NAME;
+ gss_cred_id_t delegated_cred = GSS_C_NO_CREDENTIAL;
+ char *p;
+
+ if (gss_connection == NULL) {
+ gss_connection = ap_pcalloc(r->connection->pool, sizeof(*gss_connection));
+ if (gss_connection == NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "ap_pcalloc() failed");
+ ret = SERVER_ERROR;
+ goto end;
+ }
+ memset(gss_connection, 0, sizeof(*gss_connection));
+ ap_register_cleanup(r->connection->pool, gss_connection, cleanup_gss_connection, ap_null_cleanup);
+ }
+
+ if (gss_connection->server_creds == GSS_C_NO_CREDENTIAL) {
+ ret = get_gss_creds(r, conf, &gss_connection->server_creds);
+ if (ret)
+ goto end;
+ }
+
+ /* ap_getword() shifts parameter */
+ auth_param = ap_getword_white(r->pool, &auth_line);
+ if (auth_param == NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "No Authorization parameter from client");
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+ input_token.length = ap_base64decode_len(auth_param);
+ input_token.value = ap_pcalloc(r->connection->pool, input_token.length);
+ if (input_token.value == NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "Not enough memory");
+ ret = SERVER_ERROR;
+ goto end;
+ }
+ input_token.length = ap_base64decode(input_token.value, auth_param);
+
+ major_status = gss_accept_sec_context(&minor_status,
+ &gss_connection->context,
+ gss_connection->server_creds,
+ &input_token,
+ GSS_C_NO_CHANNEL_BINDINGS,
+ &client_name,
+ NULL,
+ &output_token,
+ NULL,
+ NULL,
+ &delegated_cred);
+ if (output_token.length) {
+ char *token = NULL;
+ size_t len;
+
+ len = ap_base64encode_len(output_token.length);
+ token = ap_pcalloc(r->connection->pool, len + 1);
+ if (token == NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "Not enough memory");
+ ret = SERVER_ERROR;
+ gss_release_buffer(&minor_status2, &output_token);
+ goto end;
+ }
+ ap_base64encode(token, output_token.value, output_token.length);
+ token[len] = '\0';
+ ap_table_set(r->err_headers_out, "WWW-Authenticate",
+ ap_pstrcat(r->pool, "GSS-Negotiate ", token, NULL));
+ free(token);
+ gss_release_buffer(&minor_status2, &output_token);
+ }
+
+ if (GSS_ERROR(major_status)) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "%s", get_gss_error(r->pool, minor_status,
+ "gss_accept_sec_context() failed"));
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+ if (major_status & GSS_S_CONTINUE_NEEDED) {
+#if 0
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "only one authentication iteration allowed");
+#endif
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+ major_status = gss_export_name(&minor_status, client_name, &output_token);
+ gss_release_name(&minor_status, &client_name);
+ if (GSS_ERROR(major_status)) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "%s", get_gss_error(r->pool, minor_status,
+ "gss_export_name() failed"));
+ ret = SERVER_ERROR;
+ goto end;
+ }
+
+ r->connection->ap_auth_type = "Negotiate";
+ r->connection->user = ap_pstrdup(r->pool, output_token.value);
+#if 0
+ /* If the user comes from a realm specified by configuration don't include
+ its realm name in the username so that the authorization routine could
+ work for both Password-based and Ticket-based authentication. It's
+ administrators responsibility to include only such realm that have
+ unified principal instances, i.e. if the same principal name occures in
+ multiple realms, it must be always assigned to a single user.
+ */
+ p = strchr(r->connection->user, '@');
+ if (p != NULL) {
+ const char *realms = conf->gss_krb5_realms;
+
+ while (realms && *realms) {
+ if (strcmp(p+1, ap_getword_white(r->pool, &realms)) == 0) {
+ *p = '\0';
+ break;
+ }
+ }
+ }
+#endif
+
+ gss_release_buffer(&minor_status, &output_token);
+
+#if 0
+ /* This should be only done if afs token are requested or gss_save creds is
+ * specified */
+ /* gss_export_cred() from the GGF GSS Extensions could be used */
+ if (delegated_cred != GSS_C_NO_CREDENTIAL &&
+ (conf->gss_save_creds || (conf->gss_krb5_cells && k_hasafs()))) {
+ krb5_init_context(&krb_ctx);
+ do_afs_log(krb_ctx, r, delegated_cred->ccache, conf->gss_krb5_cells);
+ ret = store_krb5_creds(krb_ctx, r, conf, delegated_cred->ccache);
+ krb5_free_context(krb_ctx);
+ if (ret)
+ goto end;
+ }
+#endif
+ ret = OK;
+
+end:
+ if (delegated_cred)
+ gss_release_cred(&minor_status, &delegated_cred);
+
+ if (output_token.length)
+ gss_release_buffer(&minor_status, &output_token);
+
+ if (client_name != GSS_C_NO_NAME)
+ gss_release_name(&minor_status, &client_name);
+
+ return ret;
+}
/***************************************************************************
User Authentication
***************************************************************************/
-int kerb_authenticate_user(request_rec *r) {
+int kerb_authenticate_user(request_rec *r)
+{
const char *name; /* AuthName specified */
const char *type; /* AuthType specified */
int KerberosV5 = 0; /* Kerberos V5 check enabled */
name = ap_auth_name(r);
if (!name) {
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
- MK_RERROR_LEVEL "need AuthName: %s", r->uri);
return HTTP_INTERNAL_SERVER_ERROR;
}
if (!auth_line) {
MK_TABLE_SET(r->err_headers_out, "WWW-Authenticate",
- ap_pstrcat(r->pool, "Basic realm=\"", name, "\"", NULL));
+ (char *)ap_pstrcat(r->pool,
+ "Basic realm=\"", name, "\"", NULL));
return HTTP_UNAUTHORIZED;
}
#ifdef KRB5
if (KerberosV5 && !KerberosV4first && retcode != OK) {
MK_AUTH_TYPE = "KerberosV5";
- if (kerb5_password_validate(MK_USER, sent_pw)) {
+ if (kerb5_password_validate(r, MK_USER, sent_pw)) {
retcode = OK;
}
else {
#ifdef KRB4
if (KerberosV4 && retcode != OK) {
MK_AUTH_TYPE = "KerberosV4";
- if (kerb4_password_validate(MK_USER, sent_pw)) {
+ if (kerb4_password_validate(r, MK_USER, sent_pw)) {
retcode = OK;
}
else {
#if defined(KRB5) && defined(KRB4)
if (KerberosV5 && KerberosV4first && retcode != OK) {
MK_AUTH_TYPE = "KerberosV5";
- if (kerb5_password_validate(MK_USER, sent_pw)) {
+ if (kerb5_password_validate(r, MK_USER, sent_pw)) {
retcode = OK;
}
else {
/***************************************************************************
Access Verification
***************************************************************************/
-int kerb_check_user_access(request_rec *r) {
+int kerb_check_user_access(request_rec *r)
+{
register int x;
const char *t, *w;
const MK_ARRAY_HEADER *reqs_arr = ap_requires(r);
projects / mod_auth_kerb.cvs / .git / blobdiff