[taler-exchange] branch master updated: add new cmd to revoke denominations via HTTP API

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grothoff pushed a commit to branch master
in repository exchange.

The following commit(s) were added to refs/heads/master by this push:
     new b1932df0 add new cmd to revoke denominations via HTTP API
b1932df0 is described below

commit b1932df0ce88c7d39502af58f19e0a709e08048c
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Fri Nov 27 00:26:30 2020 +0100

    add new cmd to revoke denominations via HTTP API
---
 src/include/taler_testing_lib.h                |   9 +-
 src/testing/Makefile.am                        |   1 +
 src/testing/testing_api_cmd_revoke_denom_key.c | 297 +++++++++++++++++++++++++
 3 files changed, 305 insertions(+), 2 deletions(-)

diff --git a/src/include/taler_testing_lib.h b/src/include/taler_testing_lib.h
index 05172644..9ddc28a3 100644
--- a/src/include/taler_testing_lib.h
+++ b/src/include/taler_testing_lib.h
@@ -2104,14 +2104,19 @@ TALER_TESTING_cmd_offline_sign_keys (const char *label,
  * Revoke an exchange denomination key.
  *
  * @param label command label.
+ * @param expected_http_status expected HTTP status from exchange
+ * @param bad_sig should we use a bogus signature?
  * @param denom_ref reference to a command that identifies
  *        a denomination key (i.e. because it was used to
  *        withdraw a coin).
  * @return the command
  */
 struct TALER_TESTING_Command
-TALER_TESTING_cmd_revoke_denom_key (const char *label,
-                                    const char *denom_ref);
+TALER_TESTING_cmd_revoke_denomination (
+  const char *label,
+  unsigned int expected_response_code,
+  bool bad_sig,
+  const char *denom_ref);
 
 
 /**
diff --git a/src/testing/Makefile.am b/src/testing/Makefile.am
index 0850f842..a2a016ac 100644
--- a/src/testing/Makefile.am
+++ b/src/testing/Makefile.am
@@ -64,6 +64,7 @@ libtalertesting_la_SOURCES = \
   testing_api_cmd_refund.c \
   testing_api_cmd_refresh.c \
   testing_api_cmd_revoke.c \
+  testing_api_cmd_revoke_denom_key.c \
   testing_api_cmd_rewind.c \
   testing_api_cmd_serialize_keys.c \
   testing_api_cmd_signal.c \
diff --git a/src/testing/testing_api_cmd_revoke_denom_key.c 
b/src/testing/testing_api_cmd_revoke_denom_key.c
new file mode 100644
index 00000000..133838e3
--- /dev/null
+++ b/src/testing/testing_api_cmd_revoke_denom_key.c
@@ -0,0 +1,297 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2014-2020 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 testing/testing_api_cmd_revoke_denom_key.c
+ * @brief Implement the revoke test command.
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "taler_json_lib.h"
+#include <gnunet/gnunet_curl_lib.h>
+#include "taler_signatures.h"
+#include "taler_testing_lib.h"
+
+
+/**
+ * State for a "revoke" CMD.
+ */
+struct RevokeState
+{
+  /**
+   * Expected HTTP status code.
+   */
+  unsigned int expected_response_code;
+
+  /**
+   * Command that offers a denomination to revoke.
+   */
+  const char *coin_reference;
+
+  /**
+   * The interpreter state.
+   */
+  struct TALER_TESTING_Interpreter *is;
+
+  /**
+   * Handle for the operation.
+   */
+  struct TALER_EXCHANGE_ManagementRevokeDenominationKeyHandle *kh;
+
+  /**
+   * Should we use a bogus signature?
+   */
+  bool bad_sig;
+
+};
+
+
+/**
+ * Function called with information about the post revocation operation result.
+ *
+ * @param cls closure with a `struct RevokeState *`
+ * @param hr HTTP response data
+ */
+static void
+success_cb (
+  void *cls,
+  const struct TALER_EXCHANGE_HttpResponse *hr)
+{
+  struct RevokeState *rs = cls;
+
+  rs->kh = NULL;
+  if (rs->expected_response_code != hr->http_status)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Unexpected response code %u to command %s in %s:%u\n",
+                hr->http_status,
+                rs->is->commands[rs->is->ip].label,
+                __FILE__,
+                __LINE__);
+    json_dumpf (hr->reply,
+                stderr,
+                0);
+    TALER_TESTING_interpreter_fail (rs->is);
+    return;
+  }
+  TALER_TESTING_interpreter_next (rs->is);
+}
+
+
+/**
+ * Cleanup the state.
+ *
+ * @param cls closure, must be a `struct RevokeState`.
+ * @param cmd the command which is being cleaned up.
+ */
+static void
+revoke_cleanup (void *cls,
+                const struct TALER_TESTING_Command *cmd)
+{
+  struct RevokeState *rs = cls;
+
+  if (NULL != rs->kh)
+  {
+    TALER_EXCHANGE_management_revoke_denomination_key_cancel (rs->kh);
+    rs->kh = NULL;
+  }
+  GNUNET_free (rs);
+}
+
+
+/**
+ * Offer internal data from a "revoke" CMD to other CMDs.
+ *
+ * @param cls closure
+ * @param[out] ret result (could be anything)
+ * @param trait name of the trait
+ * @param index index number of the object to offer.
+ * @return #GNUNET_OK on success
+ */
+static int
+revoke_traits (void *cls,
+               const void **ret,
+               const char *trait,
+               unsigned int index)
+{
+  struct RevokeState *rs = cls;
+  struct TALER_TESTING_Trait traits[] = {
+    TALER_TESTING_trait_end ()
+  };
+
+  (void) rs;
+  return TALER_TESTING_get_trait (traits,
+                                  ret,
+                                  trait,
+                                  index);
+}
+
+
+/**
+ * Run the "revoke" command.  The core of the function
+ * is to call the "keyup" utility passing it the base32
+ * encoding of the denomination to revoke.
+ *
+ * @param cls closure.
+ * @param cmd the command to execute.
+ * @param is the interpreter state.
+ */
+static void
+revoke_run (void *cls,
+            const struct TALER_TESTING_Command *cmd,
+            struct TALER_TESTING_Interpreter *is)
+{
+  struct RevokeState *rs = cls;
+  const struct TALER_TESTING_Command *coin_cmd;
+  const struct TALER_EXCHANGE_DenomPublicKey *denom_pub;
+  char *exchange_url;
+  struct TALER_MasterSignatureP master_sig;
+
+  rs->is = is;
+  /* Get denom pub from trait */
+  coin_cmd = TALER_TESTING_interpreter_lookup_command (is,
+                                                       rs->coin_reference);
+
+  if (NULL == coin_cmd)
+  {
+    GNUNET_break (0);
+    TALER_TESTING_interpreter_fail (is);
+    return;
+  }
+  GNUNET_assert (GNUNET_OK ==
+                 TALER_TESTING_get_trait_denom_pub (coin_cmd,
+                                                    0,
+                                                    &denom_pub));
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "Trying to revoke denom '%s..'\n",
+              TALER_B2S (&denom_pub->h_key));
+  if (rs->bad_sig)
+  {
+    memset (&master_sig,
+            42,
+            sizeof (master_sig));
+  }
+  else
+  {
+    char *fn;
+    struct TALER_MasterPrivateKeyP master_priv;
+
+    if (GNUNET_OK !=
+        GNUNET_CONFIGURATION_get_value_filename (is->cfg,
+                                                 "exchange-offline",
+                                                 "MASTER_PRIV_FILE",
+                                                 &fn))
+    {
+      GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+                                 "exchange-offline",
+                                 "MASTER_PRIV_FILE");
+      TALER_TESTING_interpreter_next (rs->is);
+      return;
+    }
+    if (GNUNET_SYSERR ==
+        GNUNET_DISK_directory_create_for_file (fn))
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  "Could not setup directory for master private key file 
`%s'\n",
+                  fn);
+      GNUNET_free (fn);
+      TALER_TESTING_interpreter_next (rs->is);
+      return;
+    }
+    if (GNUNET_OK !=
+        GNUNET_CRYPTO_eddsa_key_from_file (fn,
+                                           GNUNET_YES,
+                                           &master_priv.eddsa_priv))
+    {
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  "Could not load master private key from `%s'\n",
+                  fn);
+      GNUNET_free (fn);
+      TALER_TESTING_interpreter_next (rs->is);
+      return;
+    }
+    GNUNET_free (fn);
+
+    /* now sign */
+    {
+      struct TALER_MasterDenominationKeyRevocationPS kv = {
+        .purpose.purpose = htonl (
+          TALER_SIGNATURE_MASTER_DENOMINATION_KEY_REVOKED),
+        .purpose.size = htonl (sizeof (kv)),
+        .h_denom_pub = denom_pub->h_key
+      };
+
+      GNUNET_CRYPTO_eddsa_sign (&master_priv.eddsa_priv,
+                                &kv,
+                                &master_sig.eddsa_signature);
+    }
+  }
+  if (GNUNET_OK !=
+      GNUNET_CONFIGURATION_get_value_string (is->cfg,
+                                             "exchange",
+                                             "BASE_URL",
+                                             &exchange_url))
+  {
+    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+                               "exchange",
+                               "BASE_URL");
+    TALER_TESTING_interpreter_next (rs->is);
+    return;
+  }
+  rs->kh = TALER_EXCHANGE_management_revoke_denomination_key (
+    is->ctx,
+    exchange_url,
+    &denom_pub->h_key,
+    &master_sig,
+    &success_cb,
+    rs);
+  GNUNET_free (exchange_url);
+  if (NULL == rs->kh)
+  {
+    GNUNET_break (0);
+    TALER_TESTING_interpreter_fail (is);
+    return;
+  }
+}
+
+
+struct TALER_TESTING_Command
+TALER_TESTING_cmd_revoke_denomination (
+  const char *label,
+  unsigned int expected_response_code,
+  bool bad_sig,
+  const char *denom_ref)
+{
+  struct RevokeState *rs;
+
+  rs = GNUNET_new (struct RevokeState);
+  rs->expected_response_code = expected_response_code;
+  rs->coin_reference = denom_ref;
+  rs->bad_sig = bad_sig;
+  {
+    struct TALER_TESTING_Command cmd = {
+      .cls = rs,
+      .label = label,
+      .run = &revoke_run,
+      .cleanup = &revoke_cleanup,
+      .traits = &revoke_traits
+    };
+
+    return cmd;
+  }
+}

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