[taler-exchange] 128/130: towards merging with master

[gnunet]

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grothoff pushed a commit to branch master
in repository exchange.

commit b7a35e0daa2a1e1b47810106b391e4a6d5016aa6
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Wed Nov 17 11:26:43 2021 +0100

    towards merging with master
---
 src/util/taler-crypto-worker.c | 269 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 269 insertions(+)

diff --git a/src/util/taler-crypto-worker.c b/src/util/taler-crypto-worker.c
new file mode 100644
index 00000000..e4480978
--- /dev/null
+++ b/src/util/taler-crypto-worker.c
@@ -0,0 +1,269 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2014-2021 Taler Systems SA
+
+  TALER is free software; you can redistribute it and/or modify it under the
+  terms of the GNU General Public License as published by the Free Software
+  Foundation; either version 3, or (at your option) any later version.
+
+  TALER 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 General Public License for more details.
+
+  You should have received a copy of the GNU General Public License along with
+  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file util/taler-crypto-worker.c
+ * @brief Standalone process to perform various cryptographic operations.
+ * @author Florian Dold
+ */
+#include "platform.h"
+#include "taler_util.h"
+#include <gnunet/gnunet_json_lib.h>
+#include <gnunet/gnunet_crypto_lib.h>
+#include "taler_error_codes.h"
+#include "taler_json_lib.h"
+#include "taler_signatures.h"
+#include "secmod_common.h"
+
+
+/**
+ * Return value from main().
+ */
+static int global_ret;
+
+
+/**
+ * Main function that will be run under the GNUnet scheduler.
+ *
+ * @param cls closure
+ * @param args remaining command-line arguments
+ * @param cfgfile name of the configuration file used (for saving, can be 
NULL!)
+ * @param cfg configuration
+ */
+static void
+run (void *cls,
+     char *const *args,
+     const char *cfgfile,
+     const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+  (void) cls;
+  (void) args;
+  (void) cfgfile;
+
+  json_t *req;
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "started crypto worker\n");
+
+  for (;;)
+  {
+    const char *op;
+    const json_t *args;
+    req = json_loadf (stdin, JSON_DISABLE_EOF_CHECK, NULL);
+    if (NULL == req)
+    {
+      if (feof (stdin))
+      {
+        GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+                    "end of input\n");
+        global_ret = 0;
+        return;
+      }
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  "invalid JSON\n");
+      global_ret = 1;
+      return;
+    }
+    op = json_string_value (json_object_get (req,
+                                             "op"));
+    if (! op)
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  "no op specified\n");
+      global_ret = 1;
+      return;
+    }
+    args = json_object_get (req, "args");
+    if (! args)
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  "no args specified\n");
+      global_ret = 1;
+      return;
+    }
+    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+                "got request\n");
+    if (0 == strcmp ("eddsa_verify",
+                     op))
+    {
+      struct GNUNET_CRYPTO_EddsaPublicKey pub;
+      struct GNUNET_CRYPTO_EddsaSignature sig;
+      struct GNUNET_CRYPTO_EccSignaturePurpose *msg;
+      size_t msg_size;
+      enum GNUNET_GenericReturnValue verify_ret;
+      json_t *resp;
+      struct GNUNET_JSON_Specification eddsa_verify_spec[] = {
+        GNUNET_JSON_spec_fixed_auto ("pub",
+                                     &pub),
+        GNUNET_JSON_spec_fixed_auto ("sig",
+                                     &sig),
+        GNUNET_JSON_spec_varsize ("msg",
+                                  &msg,
+                                  &msg_size),
+        GNUNET_JSON_spec_end ()
+      };
+      if (GNUNET_OK != GNUNET_JSON_parse (args,
+                                          eddsa_verify_spec,
+                                          NULL,
+                                          NULL))
+      {
+        GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                    "malformed op args\n");
+        global_ret = 1;
+        return;
+      }
+      verify_ret = GNUNET_CRYPTO_eddsa_verify_ (
+        ntohl (msg->purpose),
+        msg,
+        &sig,
+        &pub);
+      resp = GNUNET_JSON_PACK (
+        GNUNET_JSON_pack_bool ("valid",
+                               GNUNET_OK == verify_ret));
+      json_dumpf (resp, stdout, JSON_COMPACT);
+      printf ("\n");
+      fflush (stdout);
+      GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+                  "sent response\n");
+      continue;
+    }
+    if (0 == strcmp ("setup_refresh_planchet", op))
+    {
+      struct TALER_DenominationPublicKey denom_pub;
+      struct TALER_Amount fee_withdraw;
+      struct TALER_Amount value;
+      struct TALER_ReservePublicKeyP reserve_pub;
+      struct TALER_ReservePublicKeyP reserve_priv;
+      uint32_t coin_index;
+      json_t *resp;
+      struct GNUNET_JSON_Specification eddsa_verify_spec[] = {
+        GNUNET_JSON_spec_rsa_public_key ("denom_pub",
+                                         &denom_pub.rsa_public_key),
+        TALER_JSON_spec_amount_any ("fee_withdraw", &fee_withdraw),
+        TALER_JSON_spec_amount_any ("value", &value),
+        GNUNET_JSON_spec_fixed_auto ("reserve_pub", &reserve_pub),
+        GNUNET_JSON_spec_fixed_auto ("reserve_priv", &reserve_priv),
+        GNUNET_JSON_spec_uint32 ("coin_index", &coin_index),
+        GNUNET_JSON_spec_end ()
+      };
+      if (GNUNET_OK != GNUNET_JSON_parse (args,
+                                          eddsa_verify_spec,
+                                          NULL,
+                                          NULL))
+      {
+        GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                    "malformed op args\n");
+        global_ret = 1;
+        return;
+      }
+      TALER_planchet_setup_refresh (&transfer_secret,
+                                    coin_num_salt, &ps);
+      GNUNET_CRYPTO_eddsa_key_get_public (&ps.coin_priv.eddsa_priv,
+                                          &coin_pub);
+
+      resp = GNUNET_JSON_PACK (
+        GNUNET_JSON_pack_data_auto ("coin_priv", &ps.coin_priv),
+        GNUNET_JSON_pack_data_auto ("coin_pub", &coin_pub),
+        GNUNET_JSON_pack_data_auto ("blinding_key", &ps.blinding_key)
+        );
+      json_dumpf (resp, stdout, JSON_COMPACT);
+      printf ("\n");
+      fflush (stdout);
+      GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+                  "sent response\n");
+      continue;
+    }
+    if (0 == strcmp (op, "create_planchet"))
+    {
+      struct TALER_TransferSecretP transfer_secret;
+      uint32_t coin_num_salt;
+      struct TALER_PlanchetSecretsP ps;
+      struct TALER_CoinSpendPublicKeyP coin_pub;
+      json_t *resp;
+      struct GNUNET_JSON_Specification eddsa_verify_spec[] = {
+        GNUNET_JSON_spec_fixed_auto ("transfer_secret",
+                                     &transfer_secret),
+        GNUNET_JSON_spec_uint32 ("coin_index",
+                                 &coin_num_salt),
+        GNUNET_JSON_spec_end ()
+      };
+      if (GNUNET_OK != GNUNET_JSON_parse (args,
+                                          eddsa_verify_spec,
+                                          NULL,
+                                          NULL))
+      {
+        GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                    "malformed op args\n");
+        global_ret = 1;
+        return;
+      }
+      TALER_planchet_setup_refresh (&transfer_secret,
+                                    coin_num_salt, &ps);
+      GNUNET_CRYPTO_eddsa_key_get_public (&ps.coin_priv.eddsa_priv,
+                                          &coin_pub);
+
+      resp = GNUNET_JSON_PACK (
+        GNUNET_JSON_pack_data_auto ("coin_priv", &ps.coin_priv),
+        GNUNET_JSON_pack_data_auto ("coin_pub", &coin_pub),
+        GNUNET_JSON_pack_data_auto ("blinding_key", &ps.blinding_key)
+        );
+      json_dumpf (resp, stdout, JSON_COMPACT);
+      printf ("\n");
+      fflush (stdout);
+      GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+                  "sent response\n");
+      continue;
+    }
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "unsupported operation '%s'\n",
+                op);
+    global_ret = 1;
+    return;
+  }
+
+}
+
+
+/**
+ * The entry point.
+ *
+ * @param argc number of arguments in @a argv
+ * @param argv command-line arguments
+ * @return 0 on normal termination
+ */
+int
+main (int argc,
+      char **argv)
+{
+  struct GNUNET_GETOPT_CommandLineOption options[] = {
+    GNUNET_GETOPT_OPTION_END
+  };
+  int ret;
+
+  /* force linker to link against libtalerutil; if we do
+   not do this, the linker may "optimize" libtalerutil
+   away and skip #TALER_OS_init(), which we do need */
+  TALER_OS_init ();
+  ret = GNUNET_PROGRAM_run (argc, argv,
+                            "taler-crypto-worker",
+                            "Execute cryptographic operations read from stdin",
+                            options,
+                            &run,
+                            NULL);
+  if (GNUNET_NO == ret)
+    return 0;
+  if (GNUNET_SYSERR == ret)
+    return 1;
+  return global_ret;
+}

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