+/*
+ * Copyright (c) 2010 CESNET
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of CESNET nor the names of its contributors may
+ * be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
#include "mod_auth_gssapi.h"
module AP_MODULE_DECLARE_DATA auth_gssapi_module;
{ NULL }
};
-static void *
-gss_config_dir_create(apr_pool_t *p, char *d)
-{
- gss_auth_config *conf;
-
- conf = (gss_auth_config *) apr_pcalloc(p, sizeof(*conf));
- return conf;
-}
-
-void
-gss_log(const char *file, int line, int level, int status,
- const request_rec *r, const char *fmt, ...)
-{
- char errstr[1024];
- va_list ap;
-
- va_start(ap, fmt);
- vsnprintf(errstr, sizeof(errstr), fmt, ap);
- va_end(ap);
-
- ap_log_rerror(file, line, level | APLOG_NOERRNO, status, r, "%s", errstr);
-}
-
static void
set_http_headers(request_rec *r, const gss_auth_config *conf,
char *negotiate_ret_value)
if (negotiate_ret_value == NULL)
return;
- negoauth_param = (*negotiate_ret_value == '\0') ? "GSSAPI" :
- apr_pstrcat(r->pool, "GSSAPI ", negotiate_ret_value, NULL);
+ negoauth_param = (*negotiate_ret_value == '\0') ? "Negotiate" :
+ apr_pstrcat(r->pool, "Negotiate ", negotiate_ret_value, NULL);
apr_table_add(r->err_headers_out, header_name, negoauth_param);
}
-static apr_status_t
-cleanup_conn_ctx(void *data)
+static int
+gss_authenticate(request_rec *r, gss_auth_config *conf, gss_conn_ctx ctx,
+ const char *auth_line, char **negotiate_ret_value)
{
- gss_conn_ctx ctx = (gss_conn_ctx) data;
- OM_uint32 minor_status;
+ 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;
+ int ret;
+ gss_name_t client_name = GSS_C_NO_NAME;
+ gss_cred_id_t delegated_cred = GSS_C_NO_CREDENTIAL;
+ gss_cred_id_t server_creds = GSS_C_NO_CREDENTIAL;
+ OM_uint32 ret_flags = 0;
+ gss_OID_desc spnego_oid;
+ OM_uint32 (*accept_sec_context)
+ (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 *);
- if (ctx && ctx->context != GSS_C_NO_CONTEXT)
- gss_delete_sec_context(&minor_status, &ctx->context, GSS_C_NO_BUFFER);
+ *negotiate_ret_value = "\0";
- return APR_SUCCESS;
-}
+ spnego_oid.length = 6;
+ spnego_oid.elements = (void *)"\x2b\x06\x01\x05\x05\x02";
-static gss_conn_ctx
-gss_get_conn_ctx(request_rec *r)
-{
- char key[1024];
- gss_conn_ctx ctx = NULL;
-
- snprintf(key, sizeof(key), "mod_auth_gssapi:conn_ctx");
- apr_pool_userdata_get((void **)&ctx, key, r->connection->pool);
- /* XXX LOG */
- if (ctx == NULL) {
- ctx = (gss_conn_ctx) apr_palloc(r->connection->pool, sizeof(*ctx));
- if (ctx == NULL)
- return NULL;
- ctx->context = GSS_C_NO_CONTEXT;
- ctx->state = GSS_CTX_EMPTY;
- ctx->user = NULL;
- apr_pool_userdata_set(ctx, key, cleanup_conn_ctx, r->connection->pool);
- }
- return ctx;
+ if (conf->krb5_keytab) {
+ char *ktname;
+ /* we don't use the ap_* calls here, since the string passed to putenv()
+ * will become part of the enviroment and shouldn't be free()ed by apache
+ */
+ ktname = malloc(strlen("KRB5_KTNAME=") + strlen(conf->krb5_keytab) + 1);
+ if (ktname == NULL) {
+ gss_log(APLOG_MARK, APLOG_ERR, 0, r, "malloc() failed: not enough memory");
+ ret = HTTP_INTERNAL_SERVER_ERROR;
+ goto end;
+ }
+ sprintf(ktname, "KRB5_KTNAME=%s", conf->krb5_keytab);
+ putenv(ktname);
+#ifdef HEIMDAL
+ /* Seems to be also supported by latest MIT */
+ gsskrb5_register_acceptor_identity(conf->krb_5_keytab);
+#endif
+ }
+
+ /* ap_getword() shifts parameter */
+ auth_param = ap_getword_white(r->pool, &auth_line);
+ if (auth_param == NULL) {
+ gss_log(APLOG_MARK, APLOG_ERR, 0, r,
+ "No Authorization parameter in request from client");
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+ if (ctx->state == GSS_CTX_ESTABLISHED) {
+ gss_delete_sec_context(&minor_status, &ctx->context, GSS_C_NO_BUFFER);
+ ctx->context = GSS_C_NO_CONTEXT;
+ ctx->state = GSS_CTX_EMPTY;
+ }
+
+ 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) {
+ gss_log(APLOG_MARK, APLOG_ERR, 0, r,
+ "ap_pcalloc() failed (not enough memory)");
+ ret = HTTP_INTERNAL_SERVER_ERROR;
+ goto end;
+ }
+ input_token.length = apr_base64_decode(input_token.value, auth_param);
+
+ /* LOG length, type */
+
+#ifdef GSSAPI_SUPPORTS_SPNEGO
+ accept_sec_context = gss_accept_sec_context;
+#else
+ accept_sec_context = (cmp_gss_type(&input_token, &spnego_oid) == 0) ?
+ gss_accept_sec_context_spnego : gss_accept_sec_context;
+#endif
+
+ major_status = accept_sec_context(&minor_status,
+ &ctx->context,
+ server_creds,
+ &input_token,
+ GSS_C_NO_CHANNEL_BINDINGS,
+ NULL,
+ NULL,
+ &output_token,
+ &ret_flags,
+ NULL,
+ &delegated_cred);
+ gss_log(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "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 = apr_base64_encode_len(output_token.length) + 1;
+ token = apr_pcalloc(r->connection->pool, len + 1);
+ if (token == NULL) {
+ gss_log(APLOG_MARK, APLOG_ERR, 0, r,
+ "ap_pcalloc() failed (not enough memory)");
+ ret = HTTP_INTERNAL_SERVER_ERROR;
+ gss_release_buffer(&minor_status2, &output_token);
+ goto end;
+ }
+ apr_base64_encode(token, output_token.value, output_token.length);
+ token[len] = '\0';
+ *negotiate_ret_value = token;
+ gss_log(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);
+ }
+
+ if (GSS_ERROR(major_status)) {
+ gss_log(APLOG_MARK, APLOG_ERR, 0, r,
+ "%s", get_gss_error(r, major_status, minor_status,
+ "Failed to establish authentication"));
+#if 0
+ /* Don't offer the Negotiate method again if call to GSS layer failed */
+ /* XXX ... which means we don't return the "error" output */
+ *negotiate_ret_value = NULL;
+#endif
+ gss_delete_sec_context(&minor_status, &ctx->context, GSS_C_NO_BUFFER);
+ ctx->context = GSS_C_NO_CONTEXT;
+ ctx->state = GSS_CTX_EMPTY;
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+ if (major_status & GSS_S_CONTINUE_NEEDED) {
+ ctx->state = GSS_CTX_IN_PROGRESS;
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+ major_status = gss_inquire_context(&minor_status, ctx->context, &client_name,
+ NULL, NULL, NULL, NULL, NULL, NULL);
+ if (GSS_ERROR(major_status)) {
+ gss_log(APLOG_MARK, APLOG_ERR, 0, r,
+ "%s", get_gss_error(r, major_status, minor_status, "gss_inquire_context() failed"));
+ ret = HTTP_INTERNAL_SERVER_ERROR;
+ goto end;
+ }
+
+ major_status = gss_display_name(&minor_status, client_name, &output_token, NULL);
+ gss_release_name(&minor_status, &client_name);
+ if (GSS_ERROR(major_status)) {
+ gss_log(APLOG_MARK, APLOG_ERR, 0, r,
+ "%s", get_gss_error(r, major_status, minor_status,
+ "gss_display_name() failed"));
+ ret = HTTP_INTERNAL_SERVER_ERROR;
+ goto end;
+ }
+
+ ctx->state = GSS_CTX_ESTABLISHED;
+ ctx->user = apr_pstrdup(r->pool, output_token.value);
+ gss_release_buffer(&minor_status, &output_token);
+
+ 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);
+
+ if (server_creds != GSS_C_NO_CREDENTIAL)
+ gss_release_cred(&minor_status, &server_creds);
+
+ return ret;
}
static int
/* get the type specified in Apache configuration */
type = ap_auth_type(r);
- if (type == NULL || strcmp(type, "GSSAPI") != 0) {
+ if (type == NULL || strcmp(type, "Negotiate") != 0) {
gss_log(APLOG_MARK, APLOG_DEBUG, 0, r,
"AuthType '%s' is not for us, bailing out",
(type) ? type : "(NULL)");
}
auth_type = ap_getword_white(r->pool, &auth_line);
- if (strcasecmp(auth_type, "GSSAPI") != 0) {
+ if (strcasecmp(auth_type, "Negotiate") != 0) {
gss_log(APLOG_MARK, APLOG_DEBUG, 0, r,
"Unsupported authentication type (%s) requested by client",
(auth_type) ? auth_type : "(NULL)");
return HTTP_UNAUTHORIZED;
}
- conn_ctx = gss_get_conn_ctx(r);
- if (conn_ctx == NULL) {
+ if ((NULL == (conn_ctx = gss_retrieve_conn_ctx(r))) &&
+ (NULL == (conn_ctx = gss_create_conn_ctx(r, conf)))) {
gss_log(APLOG_MARK, APLOG_ERR, 0, r,
"Failed to create internal context: probably not enough memory");
return HTTP_INTERNAL_SERVER_ERROR;
/* optimizing hack */
if (conn_ctx->state == GSS_CTX_ESTABLISHED && auth_line == NULL) {
r->user = apr_pstrdup(r->pool, conn_ctx->user);
- r->ap_auth_type = "GSSAPI";
+ r->ap_auth_type = "Negotiate";
return OK;
}
/* XXXX subrequests ignored, only successful accesses taken into account! */
if (!ap_is_initial_req(r) && conn_ctx->state == GSS_CTX_ESTABLISHED) {
r->user = apr_pstrdup(r->pool, conn_ctx->user);
- r->ap_auth_type = "GSSAPI";
+ r->ap_auth_type = "Negotiate";
return OK;
}
if (ret == OK) {
r->user = apr_pstrdup(r->pool, conn_ctx->user);
- r->ap_auth_type = "GSSAPI";
+ r->ap_auth_type = "Negotiate";
}
/* debug LOG ??? */
projects / mod_auth_kerb.cvs / .git / blobdiff