diff options
Diffstat (limited to 'src/journal-remote/microhttpd-util.c')
-rw-r--r-- | src/journal-remote/microhttpd-util.c | 327 |
1 files changed, 0 insertions, 327 deletions
diff --git a/src/journal-remote/microhttpd-util.c b/src/journal-remote/microhttpd-util.c deleted file mode 100644 index 8a11fba044..0000000000 --- a/src/journal-remote/microhttpd-util.c +++ /dev/null @@ -1,327 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2012 Lennart Poettering - Copyright 2012 Zbigniew Jędrzejewski-Szmek - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include <stddef.h> -#include <stdio.h> -#include <string.h> - -#include "microhttpd-util.h" -#include "log.h" -#include "macro.h" -#include "util.h" -#include "strv.h" - -#ifdef HAVE_GNUTLS -#include <gnutls/gnutls.h> -#include <gnutls/x509.h> -#endif - -void microhttpd_logger(void *arg, const char *fmt, va_list ap) { - char *f; - - f = strjoina("microhttpd: ", fmt); - - DISABLE_WARNING_FORMAT_NONLITERAL; - log_internalv(LOG_INFO, 0, NULL, 0, NULL, f, ap); - REENABLE_WARNING; -} - - -static int mhd_respond_internal(struct MHD_Connection *connection, - enum MHD_RequestTerminationCode code, - char *buffer, - size_t size, - enum MHD_ResponseMemoryMode mode) { - struct MHD_Response *response; - int r; - - assert(connection); - - response = MHD_create_response_from_buffer(size, buffer, mode); - if (!response) - return MHD_NO; - - log_debug("Queing response %u: %s", code, buffer); - MHD_add_response_header(response, "Content-Type", "text/plain"); - r = MHD_queue_response(connection, code, response); - MHD_destroy_response(response); - - return r; -} - -int mhd_respond(struct MHD_Connection *connection, - enum MHD_RequestTerminationCode code, - const char *message) { - - return mhd_respond_internal(connection, code, - (char*) message, strlen(message), - MHD_RESPMEM_PERSISTENT); -} - -int mhd_respond_oom(struct MHD_Connection *connection) { - return mhd_respond(connection, MHD_HTTP_SERVICE_UNAVAILABLE, "Out of memory.\n"); -} - -int mhd_respondf(struct MHD_Connection *connection, - enum MHD_RequestTerminationCode code, - const char *format, ...) { - - char *m; - int r; - va_list ap; - - assert(connection); - assert(format); - - va_start(ap, format); - r = vasprintf(&m, format, ap); - va_end(ap); - - if (r < 0) - return respond_oom(connection); - - return mhd_respond_internal(connection, code, m, r, MHD_RESPMEM_MUST_FREE); -} - -#ifdef HAVE_GNUTLS - -static struct { - const char *const names[4]; - int level; - bool enabled; -} gnutls_log_map[] = { - { {"0"}, LOG_DEBUG }, - { {"1", "audit"}, LOG_WARNING, true}, /* gnutls session audit */ - { {"2", "assert"}, LOG_DEBUG }, /* gnutls assert log */ - { {"3", "hsk", "ext"}, LOG_DEBUG }, /* gnutls handshake log */ - { {"4", "rec"}, LOG_DEBUG }, /* gnutls record log */ - { {"5", "dtls"}, LOG_DEBUG }, /* gnutls DTLS log */ - { {"6", "buf"}, LOG_DEBUG }, - { {"7", "write", "read"}, LOG_DEBUG }, - { {"8"}, LOG_DEBUG }, - { {"9", "enc", "int"}, LOG_DEBUG }, -}; - -static void log_func_gnutls(int level, const char *message) { - assert_se(message); - - if (0 <= level && level < (int) ELEMENTSOF(gnutls_log_map)) { - if (gnutls_log_map[level].enabled) - log_internal(gnutls_log_map[level].level, 0, NULL, 0, NULL, "gnutls %d/%s: %s", level, gnutls_log_map[level].names[1], message); - } else { - log_debug("Received GNUTLS message with unknown level %d.", level); - log_internal(LOG_DEBUG, 0, NULL, 0, NULL, "gnutls: %s", message); - } -} - -static void log_reset_gnutls_level(void) { - int i; - - for (i = ELEMENTSOF(gnutls_log_map) - 1; i >= 0; i--) - if (gnutls_log_map[i].enabled) { - log_debug("Setting gnutls log level to %d", i); - gnutls_global_set_log_level(i); - break; - } -} - -static int log_enable_gnutls_category(const char *cat) { - unsigned i; - - if (streq(cat, "all")) { - for (i = 0; i < ELEMENTSOF(gnutls_log_map); i++) - gnutls_log_map[i].enabled = true; - log_reset_gnutls_level(); - return 0; - } else - for (i = 0; i < ELEMENTSOF(gnutls_log_map); i++) - if (strv_contains((char**)gnutls_log_map[i].names, cat)) { - gnutls_log_map[i].enabled = true; - log_reset_gnutls_level(); - return 0; - } - log_error("No such log category: %s", cat); - return -EINVAL; -} - -int setup_gnutls_logger(char **categories) { - char **cat; - int r; - - gnutls_global_set_log_function(log_func_gnutls); - - if (categories) { - STRV_FOREACH(cat, categories) { - r = log_enable_gnutls_category(*cat); - if (r < 0) - return r; - } - } else - log_reset_gnutls_level(); - - return 0; -} - -static int verify_cert_authorized(gnutls_session_t session) { - unsigned status; - gnutls_certificate_type_t type; - gnutls_datum_t out; - int r; - - r = gnutls_certificate_verify_peers2(session, &status); - if (r < 0) - return log_error_errno(r, "gnutls_certificate_verify_peers2 failed: %m"); - - type = gnutls_certificate_type_get(session); - r = gnutls_certificate_verification_status_print(status, type, &out, 0); - if (r < 0) - return log_error_errno(r, "gnutls_certificate_verification_status_print failed: %m"); - - log_debug("Certificate status: %s", out.data); - gnutls_free(out.data); - - return status == 0 ? 0 : -EPERM; -} - -static int get_client_cert(gnutls_session_t session, gnutls_x509_crt_t *client_cert) { - const gnutls_datum_t *pcert; - unsigned listsize; - gnutls_x509_crt_t cert; - int r; - - assert(session); - assert(client_cert); - - pcert = gnutls_certificate_get_peers(session, &listsize); - if (!pcert || !listsize) { - log_error("Failed to retrieve certificate chain"); - return -EINVAL; - } - - r = gnutls_x509_crt_init(&cert); - if (r < 0) { - log_error("Failed to initialize client certificate"); - return r; - } - - /* Note that by passing values between 0 and listsize here, you - can get access to the CA's certs */ - r = gnutls_x509_crt_import(cert, &pcert[0], GNUTLS_X509_FMT_DER); - if (r < 0) { - log_error("Failed to import client certificate"); - gnutls_x509_crt_deinit(cert); - return r; - } - - *client_cert = cert; - return 0; -} - -static int get_auth_dn(gnutls_x509_crt_t client_cert, char **buf) { - size_t len = 0; - int r; - - assert(buf); - assert(*buf == NULL); - - r = gnutls_x509_crt_get_dn(client_cert, NULL, &len); - if (r != GNUTLS_E_SHORT_MEMORY_BUFFER) { - log_error("gnutls_x509_crt_get_dn failed"); - return r; - } - - *buf = malloc(len); - if (!*buf) - return log_oom(); - - gnutls_x509_crt_get_dn(client_cert, *buf, &len); - return 0; -} - -static inline void gnutls_x509_crt_deinitp(gnutls_x509_crt_t *p) { - gnutls_x509_crt_deinit(*p); -} - -int check_permissions(struct MHD_Connection *connection, int *code, char **hostname) { - const union MHD_ConnectionInfo *ci; - gnutls_session_t session; - _cleanup_(gnutls_x509_crt_deinitp) gnutls_x509_crt_t client_cert = NULL; - _cleanup_free_ char *buf = NULL; - int r; - - assert(connection); - assert(code); - - *code = 0; - - ci = MHD_get_connection_info(connection, - MHD_CONNECTION_INFO_GNUTLS_SESSION); - if (!ci) { - log_error("MHD_get_connection_info failed: session is unencrypted"); - *code = mhd_respond(connection, MHD_HTTP_FORBIDDEN, - "Encrypted connection is required"); - return -EPERM; - } - session = ci->tls_session; - assert(session); - - r = get_client_cert(session, &client_cert); - if (r < 0) { - *code = mhd_respond(connection, MHD_HTTP_UNAUTHORIZED, - "Authorization through certificate is required"); - return -EPERM; - } - - r = get_auth_dn(client_cert, &buf); - if (r < 0) { - *code = mhd_respond(connection, MHD_HTTP_UNAUTHORIZED, - "Failed to determine distinguished name from certificate"); - return -EPERM; - } - - log_debug("Connection from %s", buf); - - if (hostname) { - *hostname = buf; - buf = NULL; - } - - r = verify_cert_authorized(session); - if (r < 0) { - log_warning("Client is not authorized"); - *code = mhd_respond(connection, MHD_HTTP_UNAUTHORIZED, - "Client certificate not signed by recognized authority"); - } - return r; -} - -#else -int check_permissions(struct MHD_Connection *connection, int *code, char **hostname) { - return -EPERM; -} - -int setup_gnutls_logger(char **categories) { - if (categories) - log_notice("Ignoring specified gnutls logging categories — gnutls not available."); - return 0; -} -#endif |