{ 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)
apr_table_add(r->err_headers_out, header_name, negoauth_param);
}
-static apr_status_t
-cleanup_conn_ctx(void *data)
-{
- gss_conn_ctx ctx = (gss_conn_ctx) data;
- OM_uint32 minor_status;
-
- if (ctx && ctx->context != GSS_C_NO_CONTEXT)
- gss_delete_sec_context(&minor_status, &ctx->context, GSS_C_NO_BUFFER);
-
- return APR_SUCCESS;
-}
-
-static gss_conn_ctx
-gss_get_conn_ctx(request_rec *r)
+static int
+gss_authenticate(request_rec *r, gss_auth_config *conf, gss_conn_ctx ctx,
+ const char *auth_line, char **negotiate_ret_value)
{
- 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;
+ 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 *);
+
+ *negotiate_ret_value = "\0";
+
+ spnego_oid.length = 6;
+ spnego_oid.elements = (void *)"\x2b\x06\x01\x05\x05\x02";
+
+ 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
+ }
+
+ ret = get_gss_creds(r, conf, &server_creds);
+ if (ret)
+ goto end;
+
+ /* 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
projects / mod_auth_kerb.cvs / .git / blobdiff