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-rw-r--r--src/rspamadm/signtool.c386
1 files changed, 386 insertions, 0 deletions
diff --git a/src/rspamadm/signtool.c b/src/rspamadm/signtool.c
new file mode 100644
index 000000000..c63c16090
--- /dev/null
+++ b/src/rspamadm/signtool.c
@@ -0,0 +1,386 @@
+/*-
+ * Copyright 2016 Vsevolod Stakhov
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "config.h"
+#include "rspamadm.h"
+#include "cryptobox.h"
+#include "printf.h"
+#include "ucl.h"
+#include "keypair_private.h"
+#include "libutil/str_util.h"
+#include "libutil/util.h"
+#include "unix-std.h"
+
+static gboolean openssl = FALSE;
+static gboolean verify = FALSE;
+static gboolean quiet = FALSE;
+static gchar *suffix = NULL;
+static gchar *pubkey_file = NULL;
+static gchar *pubkey = NULL;
+static gchar *keypair_file = NULL;
+
+static void rspamadm_signtool (gint argc, gchar **argv);
+static const char *rspamadm_signtool_help (gboolean full_help);
+
+struct rspamadm_command signtool_command = {
+ .name = "signtool",
+ .flags = 0,
+ .help = rspamadm_signtool_help,
+ .run = rspamadm_signtool
+};
+
+static GOptionEntry entries[] = {
+ {"openssl", 'o', 0, G_OPTION_ARG_NONE, &openssl,
+ "Generate openssl nistp256 keypair not curve25519 one", NULL},
+ {"verify", 'v', 0, G_OPTION_ARG_NONE, &verify,
+ "Verify signatures and not sign", NULL},
+ {"suffix", 'S', 0, G_OPTION_ARG_STRING, &suffix,
+ "Save signatures in file<suffix> files", NULL},
+ {"pubkey", 'p', 0, G_OPTION_ARG_STRING, &pubkey,
+ "Base32 encoded pubkey to verify", NULL},
+ {"pubfile", 'P', 0, G_OPTION_ARG_FILENAME, &pubkey_file,
+ "Load base32 encoded pubkey to verify from the file", NULL},
+ {"keypair", 'k', 0, G_OPTION_ARG_STRING, &keypair_file,
+ "UCL with keypair to load for signing", NULL},
+ {"quiet", 'q', 0, G_OPTION_ARG_NONE, &quiet,
+ "Be quiet", NULL},
+ {NULL, 0, 0, G_OPTION_ARG_NONE, NULL, NULL, NULL}
+};
+
+static const char *
+rspamadm_signtool_help (gboolean full_help)
+{
+ const char *help_str;
+
+ if (full_help) {
+ help_str = "Manage digital signatures\n\n"
+ "Usage: rspamadm signtool [-o] -k <keypair_file> [-v -p <pubkey> | -P <pubkey_file>] [-S <suffix>] file1 ...\n"
+ "Where options are:\n\n"
+ "-v: verify against pubkey instead of \n"
+ "-o: use ECDSA instead of EdDSA\n"
+ "-p: load pubkey as base32 string\n"
+ "-P: load pubkey paced in file\n"
+ "-k: load signing keypair from ucl file\n"
+ "-S: append suffix for signatures and store them in files\n"
+ "-q: be quiet\n"
+ "--help: shows available options and commands";
+ }
+ else {
+ help_str = "Create encryption key pairs";
+ }
+
+ return help_str;
+}
+
+static bool
+rspamadm_sign_file (const gchar *fname, const guchar *sk)
+{
+ gint fd_sig, fd_input;
+ guchar sig[rspamd_cryptobox_MAX_SIGBYTES], *map;
+ gchar sigpath[PATH_MAX];
+ struct stat st;
+
+ if (suffix == NULL) {
+ suffix = ".sig";
+ }
+
+ fd_input = rspamd_file_xopen (fname, O_RDONLY, 0);
+
+ if (fd_input == -1) {
+ rspamd_fprintf (stderr, "cannot open %s: %s\n", fname,
+ strerror (errno));
+ exit (errno);
+ }
+
+ g_assert (fstat (fd_input, &st) != -1);
+
+ rspamd_snprintf (sigpath, sizeof (sigpath), "%s%s", fname, suffix);
+ fd_sig = rspamd_file_xopen (sigpath, O_WRONLY | O_CREAT | O_TRUNC, 00644);
+
+ if (fd_sig == -1) {
+ close (fd_input);
+ rspamd_fprintf (stderr, "cannot open %s: %s\n", sigpath,
+ strerror (errno));
+ exit (errno);
+ }
+
+ map = mmap (NULL, st.st_size, PROT_READ, MAP_SHARED, fd_input, 0);
+ close (fd_input);
+
+ if (map == MAP_FAILED) {
+ close (fd_sig);
+ rspamd_fprintf (stderr, "cannot map %s: %s\n", fname,
+ strerror (errno));
+ exit (errno);
+ }
+
+ g_assert (rspamd_cryptobox_MAX_SIGBYTES >= rspamd_cryptobox_signature_bytes ());
+
+ rspamd_cryptobox_sign (sig, NULL, map, st.st_size, sk);
+ write (fd_sig, sig, rspamd_cryptobox_signature_bytes ());
+ close (fd_sig);
+ munmap (map, st.st_size);
+
+ if (!quiet) {
+ rspamd_fprintf (stdout, "signed %s; stored hash in %s\n",
+ fname, sigpath);
+ }
+
+ return true;
+}
+
+static bool
+rspamadm_verify_file (const gchar *fname, const guchar *pk)
+{
+ gint fd_sig, fd_input;
+ guchar *map, *map_sig;
+ gchar sigpath[PATH_MAX];
+ struct stat st, st_sig;
+ bool ret;
+
+ g_assert (rspamd_cryptobox_MAX_SIGBYTES >= rspamd_cryptobox_signature_bytes ());
+
+ if (suffix == NULL) {
+ suffix = ".sig";
+ }
+
+ fd_input = rspamd_file_xopen (fname, O_RDONLY, 0);
+
+ if (fd_input == -1) {
+ rspamd_fprintf (stderr, "cannot open %s: %s\n", fname,
+ strerror (errno));
+ exit (errno);
+ }
+
+ g_assert (fstat (fd_input, &st) != -1);
+
+ rspamd_snprintf (sigpath, sizeof (sigpath), "%s%s", fname, suffix);
+ fd_sig = rspamd_file_xopen (sigpath, O_RDONLY, 0);
+
+ if (fd_sig == -1) {
+ close (fd_input);
+ rspamd_fprintf (stderr, "cannot open %s: %s\n", sigpath,
+ strerror (errno));
+ exit (errno);
+ }
+
+ map = mmap (NULL, st.st_size, PROT_READ, MAP_SHARED, fd_input, 0);
+ close (fd_input);
+
+ if (map == MAP_FAILED) {
+ close (fd_sig);
+ rspamd_fprintf (stderr, "cannot open %s: %s\n", sigpath,
+ strerror (errno));
+ exit (errno);
+ }
+
+ g_assert (fstat (fd_sig, &st_sig) != -1);
+
+ if (st_sig.st_size != rspamd_cryptobox_signature_bytes ()) {
+ close (fd_sig);
+ rspamd_fprintf (stderr, "invalid signature size %s: %ud\n", fname,
+ (guint)st_sig.st_size);
+ munmap (map, st.st_size);
+ exit (errno);
+ }
+
+ map_sig = mmap (NULL, st_sig.st_size, PROT_READ, MAP_SHARED, fd_sig, 0);
+ close (fd_sig);
+
+ if (map_sig == MAP_FAILED) {
+ munmap (map, st.st_size);
+ rspamd_fprintf (stderr, "cannot map %s: %s\n", sigpath,
+ strerror (errno));
+ exit (errno);
+ }
+
+ ret = rspamd_cryptobox_verify (map_sig, map, st.st_size, pk);
+ munmap (map, st.st_size);
+ munmap (map_sig, st_sig.st_size);
+
+ if (!ret) {
+ rspamd_fprintf (stderr, "cannot verify %s using %s: invalid signature\n",
+ fname, sigpath);
+ }
+ else if (!quiet) {
+ rspamd_fprintf (stdout, "verified %s using %s\n",
+ fname, sigpath);
+ }
+
+ return ret;
+}
+
+
+static void
+rspamadm_signtool (gint argc, gchar **argv)
+{
+ GOptionContext *context;
+ GError *error = NULL;
+ struct ucl_parser *parser;
+ ucl_object_t *top;
+ const ucl_object_t *elt;
+ guchar *pk, *sk;
+ gsize fsize, flen, klen;
+ gint i;
+
+ context = g_option_context_new (
+ "keypair - create encryption keys");
+ g_option_context_set_summary (context,
+ "Summary:\n Rspamd administration utility version "
+ RVERSION
+ "\n Release id: "
+ RID);
+ g_option_context_add_main_entries (context, entries, NULL);
+
+ if (!g_option_context_parse (context, &argc, &argv, &error)) {
+ rspamd_fprintf (stderr, "option parsing failed: %s\n", error->message);
+ g_error_free (error);
+ exit (1);
+ }
+
+ if (openssl) {
+ if (!rspamd_cryptobox_openssl_mode (TRUE)) {
+ rspamd_fprintf (stderr, "cannot enable openssl mode (incompatible openssl)\n");
+ exit (1);
+ }
+ }
+
+ if (verify && (!pubkey && !pubkey_file)) {
+ rspamd_fprintf (stderr, "no pubkey for verification\n");
+ exit (1);
+ }
+ else if (!verify && (!keypair_file)) {
+ rspamd_fprintf (stderr, "no keypair for signing\n");
+ exit (1);
+ }
+
+ if (verify) {
+ g_assert (pubkey || pubkey_file);
+
+ if (pubkey_file) {
+ gint fd;
+ gchar *map;
+ struct stat st;
+
+ fd = open (pubkey_file, O_RDONLY);
+
+ if (fd == -1) {
+ rspamd_fprintf (stderr, "cannot open %s: %s\n", pubkey_file,
+ strerror (errno));
+ exit (errno);
+ }
+
+ g_assert (fstat (fd, &st) != -1);
+ fsize = st.st_size;
+ flen = fsize;
+ map = mmap (NULL, fsize, PROT_READ, MAP_SHARED, fd, 0);
+ close (fd);
+
+ if (map == MAP_FAILED) {
+ rspamd_fprintf (stderr, "cannot read %s: %s\n", pubkey_file,
+ strerror (errno));
+ exit (errno);
+ }
+
+ /* XXX: assume base32 pubkey now */
+ while (flen > 0 && g_ascii_isspace (map[flen - 1])) {
+ flen --;
+ }
+
+ pk = rspamd_decode_base32 (map, flen, &klen);
+
+ if (klen != rspamd_cryptobox_pk_sig_bytes () || pk == NULL) {
+ rspamd_fprintf (stderr, "bad size %s: %ud, %ud expected\n", klen,
+ rspamd_cryptobox_pk_sig_bytes ());
+ exit (errno);
+ }
+
+ munmap (map, fsize);
+ }
+ else {
+ pk = rspamd_decode_base32 (pubkey, strlen (pubkey), &klen);
+
+ if (klen != rspamd_cryptobox_pk_sig_bytes () || pk == NULL) {
+ rspamd_fprintf (stderr, "bad size %s: %ud, %ud expected\n", klen,
+ rspamd_cryptobox_pk_sig_bytes ());
+ exit (errno);
+ }
+ }
+
+ for (i = 1; i < argc; i++) {
+ /* XXX: support cmd line signature */
+ if (!rspamadm_verify_file (argv[i], pk)) {
+ exit (EXIT_FAILURE);
+ }
+ }
+
+ g_free (pk);
+ }
+ else {
+ g_assert (keypair_file != NULL);
+
+ parser = ucl_parser_new (0);
+
+ if (!ucl_parser_add_file (parser, keypair_file) ||
+ (top = ucl_parser_get_object (parser)) == NULL) {
+ rspamd_fprintf (stderr, "cannot load keypair: %s\n",
+ ucl_parser_get_error (parser));
+ exit (EINVAL);
+ }
+
+ ucl_parser_free (parser);
+
+ /* XXX: add generic routine to parse all keypair types */
+ elt = ucl_object_find_key (top, "keypair");
+
+ /* XXX: add secure cleanup */
+ if (elt == NULL || ucl_object_type (elt) != UCL_OBJECT) {
+ rspamd_fprintf (stderr, "cannot load keypair: absent keypair\n");
+ ucl_object_unref (top);
+ exit (EINVAL);
+ }
+
+ elt = ucl_object_find_key (elt, "privkey");
+
+ if (elt == NULL || ucl_object_type (elt) != UCL_STRING) {
+ rspamd_fprintf (stderr, "cannot load keypair: absent privkey\n");
+ ucl_object_unref (top);
+ exit (EINVAL);
+ }
+
+ sk = rspamd_decode_base32 (ucl_object_tostring (elt),
+ elt->len, &klen);
+ ucl_object_unref (top);
+
+ if (klen != rspamd_cryptobox_sk_sig_bytes () || sk == NULL) {
+ rspamd_fprintf (stderr, "bad size %s: %ud, %ud expected\n",
+ ucl_object_tostring (elt),klen,
+ rspamd_cryptobox_sk_sig_bytes ());
+ exit (errno);
+ }
+
+ for (i = 1; i < argc; i++) {
+ /* XXX: support cmd line signature */
+ if (!rspamadm_sign_file (argv[i], sk)) {
+ rspamd_explicit_memzero (sk, klen);
+ exit (EXIT_FAILURE);
+ }
+ }
+
+ rspamd_explicit_memzero (sk, klen);
+ g_free (sk);
+ }
+}
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