renaming mint->exchange

1 files changed, 0 insertions, 1011 deletions

diff --git a/src/mint/taler-mint-httpd_keystate.c b/src/mint/taler-mint-httpd_keystate.c
deleted file mode 100644
index f1856e673..000000000
--- a/src/mint/taler-mint-httpd_keystate.c
+++ /dev/null
@@ -1,1011 +0,0 @@
-/*
-  This file is part of TALER
-  Copyright (C) 2014, 2015 GNUnet e.V.
-
-  TALER is free software; you can redistribute it and/or modify it under the
-  terms of the GNU Affero 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 Affero General Public License for more details.
-
-  You should have received a copy of the GNU Affero General Public License along with
-  TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/licenses/>
-*/
-/**
- * @file taler-mint-httpd_keystate.c
- * @brief management of our coin signing keys
- * @author Florian Dold
- * @author Benedikt Mueller
- * @author Christian Grothoff
- */
-#include "platform.h"
-#include <pthread.h>
-#include "taler-mint-httpd_keystate.h"
-#include "taler-mint-httpd_responses.h"
-#include "taler_mintdb_plugin.h"
-
-
-/**
- * Snapshot of the (coin and signing) keys (including private keys) of
- * the mint.  There can be multiple instances of this struct, as it is
- * reference counted and only destroyed once the last user is done
- * with it.  The current instance is acquired using
- * #TMH_KS_acquire().  Using this function increases the
- * reference count.  The contents of this structure (except for the
- * reference counter) should be considered READ-ONLY until it is
- * ultimately destroyed (as there can be many concurrent users).
- */
-struct TMH_KS_StateHandle
-{
-  /**
-   * JSON array with denomination keys.  (Currently not really used
-   * after initialization.)
-   */
-  json_t *denom_keys_array;
-
-  /**
-   * JSON array with signing keys. (Currently not really used
-   * after initialization.)
-   */
-  json_t *sign_keys_array;
-
-  /**
-   * JSON array with auditor information. (Currently not really used
-   * after initialization.)
-   */
-  json_t *auditors_array;
-
-  /**
-   * Cached JSON text that the mint will send for a "/keys" request.
-   * Includes our @e TMH_master_public_key public key, the signing and
-   * denomination keys as well as the @e reload_time.
-   */
-  char *keys_json;
-
-  /**
-   * Mapping from denomination keys to denomination key issue struct.
-   * Used to lookup the key by hash.
-   */
-  struct GNUNET_CONTAINER_MultiHashMap *denomkey_map;
-
-  /**
-   * Hash context we used to combine the hashes of all denomination
-   * keys into one big hash.
-   */
-  struct GNUNET_HashContext *hash_context;
-
-  /**
-   * When did we initiate the key reloading?
-   */
-  struct GNUNET_TIME_Absolute reload_time;
-
-  /**
-   * When is the next key invalid and we have to reload? (We also
-   * reload on SIGUSR1.)
-   */
-  struct GNUNET_TIME_Absolute next_reload;
-
-  /**
-   * Mint signing key that should be used currently.
-   */
-  struct TALER_MINTDB_PrivateSigningKeyInformationP current_sign_key_issue;
-
-  /**
-   * Reference count.  The struct is released when the RC hits zero.
-   */
-  unsigned int refcnt;
-};
-
-
-/**
- * Mint key state.  Never use directly, instead access via
- * #TMH_KS_acquire() and #TMH_KS_release().
- */
-static struct TMH_KS_StateHandle *internal_key_state;
-
-/**
- * Mutex protecting access to #internal_key_state.
- */
-static pthread_mutex_t internal_key_state_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-/**
- * Pipe used for signaling reloading of our key state.
- */
-static int reload_pipe[2];
-
-
-/**
- * Convert the public part of a denomination key issue to a JSON
- * object.
- *
- * @param pk public key of the denomination key
- * @param dki the denomination key issue
- * @return a JSON object describing the denomination key isue (public part)
- */
-static json_t *
-denom_key_issue_to_json (const struct TALER_DenominationPublicKey *pk,
-                         const struct TALER_MINTDB_DenominationKeyInformationP *dki)
-{
-  struct TALER_Amount value;
-  struct TALER_Amount fee_withdraw;
-  struct TALER_Amount fee_deposit;
-  struct TALER_Amount fee_refresh;
-
-  TALER_amount_ntoh (&value,
-                     &dki->properties.value);
-  TALER_amount_ntoh (&fee_withdraw,
-                     &dki->properties.fee_withdraw);
-  TALER_amount_ntoh (&fee_deposit,
-                     &dki->properties.fee_deposit);
-  TALER_amount_ntoh (&fee_refresh,
-                     &dki->properties.fee_refresh);
-  return
-    json_pack ("{s:o, s:o, s:o, s:o, s:o, s:o, s:o, s:o, s:o, s:o}",
-               "master_sig",
-               TALER_json_from_data (&dki->signature,
-                                     sizeof (struct GNUNET_CRYPTO_EddsaSignature)),
-               "stamp_start",
-               TALER_json_from_abs (GNUNET_TIME_absolute_ntoh (dki->properties.start)),
-               "stamp_expire_withdraw",
-               TALER_json_from_abs (GNUNET_TIME_absolute_ntoh (dki->properties.expire_withdraw)),
-               "stamp_expire_deposit",
-               TALER_json_from_abs (GNUNET_TIME_absolute_ntoh (dki->properties.expire_spend)),
-               "stamp_expire_legal",
-               TALER_json_from_abs (GNUNET_TIME_absolute_ntoh (dki->properties.expire_legal)),
-               "denom_pub",
-               TALER_json_from_rsa_public_key (pk->rsa_public_key),
-               "value",
-               TALER_json_from_amount (&value),
-               "fee_withdraw",
-               TALER_json_from_amount (&fee_withdraw),
-               "fee_deposit",
-               TALER_json_from_amount (&fee_deposit),
-               "fee_refresh",
-               TALER_json_from_amount (&fee_refresh));
-}
-
-
-/**
- * Get the relative time value that describes how
- * far in the future do we want to provide coin keys.
- *
- * @return the provide duration
- */
-static struct GNUNET_TIME_Relative
-TALER_MINT_conf_duration_provide ()
-{
-  struct GNUNET_TIME_Relative rel;
-
-  if (GNUNET_OK !=
-      GNUNET_CONFIGURATION_get_value_time (cfg,
-                                           "mint_keys",
-                                           "lookahead_provide",
-                                           &rel))
-  {
-    GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
-                               "mint_keys",
-                               "lookahead_provide",
-                               "time value required");
-    GNUNET_assert (0);
-  }
-  return rel;
-}
-
-
-/**
- * Iterator for (re)loading/initializing denomination keys.
- *
- * @param cls closure
- * @param dki the denomination key issue
- * @param alias coin alias
- * @return #GNUNET_OK to continue to iterate,
- *  #GNUNET_NO to stop iteration with no error,
- *  #GNUNET_SYSERR to abort iteration with error!
- */
-static int
-reload_keys_denom_iter (void *cls,
-                        const char *alias,
-                        const struct TALER_MINTDB_DenominationKeyIssueInformation *dki)
-{
-  struct TMH_KS_StateHandle *ctx = cls;
-  struct GNUNET_TIME_Absolute now;
-  struct GNUNET_TIME_Absolute horizon;
-  struct GNUNET_HashCode denom_key_hash;
-  struct TALER_MINTDB_DenominationKeyIssueInformation *d2;
-  struct TALER_MINTDB_Session *session;
-  int res;
-
-  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-              "Loading denomination key `%s'\n",
-              alias);
-  horizon = GNUNET_TIME_relative_to_absolute (TALER_MINT_conf_duration_provide ());
-  if (GNUNET_TIME_absolute_ntoh (dki->issue.properties.start).abs_value_us >
-      horizon.abs_value_us)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-                "Skipping future denomination key `%s'\n",
-                alias);
-    return GNUNET_OK;
-  }
-  now = GNUNET_TIME_absolute_get ();
-  if (GNUNET_TIME_absolute_ntoh (dki->issue.properties.expire_spend).abs_value_us <
-      now.abs_value_us)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-                "Skipping expired denomination key `%s'\n",
-                alias);
-    return GNUNET_OK;
-  }
-
-  GNUNET_CRYPTO_rsa_public_key_hash (dki->denom_pub.rsa_public_key,
-                                     &denom_key_hash);
-  GNUNET_CRYPTO_hash_context_read (ctx->hash_context,
-                                   &denom_key_hash,
-                                   sizeof (struct GNUNET_HashCode));
-  session = TMH_plugin->get_session (TMH_plugin->cls,
-                                     TMH_test_mode);
-  if (NULL == session)
-    return GNUNET_SYSERR;
-  /* Try to insert DKI into DB until we succeed; note that if the DB
-     failure is persistent, this code may loop forever (as there is no
-     sane alternative, we cannot continue without the DKI being in the
-     DB). */
-  res = GNUNET_SYSERR;
-  while (GNUNET_OK != res)
-  {
-    res = TMH_plugin->start (TMH_plugin->cls,
-                             session);
-    if (GNUNET_OK != res)
-    {
-      /* Transaction start failed!? Very bad error, log and retry */
-      GNUNET_break (0);
-      continue;
-    }
-    res = TMH_plugin->get_denomination_info (TMH_plugin->cls,
-                                             session,
-                                             &dki->denom_pub,
-                                             NULL);
-    if (GNUNET_SYSERR == res)
-    {
-      /* Fetch failed!? Very bad error, log and retry */
-      GNUNET_break (0);
-      TMH_plugin->rollback (TMH_plugin->cls,
-                            session);
-      continue;
-    }
-    if (GNUNET_OK == res)
-    {
-      /* Record exists, we're good, just exit */
-      TMH_plugin->rollback (TMH_plugin->cls,
-                            session);
-      break;
-    }
-    res = TMH_plugin->insert_denomination_info (TMH_plugin->cls,
-                                                session,
-                                                &dki->denom_pub,
-                                                &dki->issue);
-    if (GNUNET_OK != res)
-    {
-      /* Insert failed!? Very bad error, log and retry */
-      GNUNET_break (0);
-      TMH_plugin->rollback (TMH_plugin->cls,
-                            session);
-      continue;
-    }
-    res = TMH_plugin->commit (TMH_plugin->cls,
-                              session);
-    /* If commit succeeded, we're done, otherwise we retry; this
-       time without logging, as theroetically commits can fail
-       in a transactional DB due to concurrent activities that
-       cannot be reconciled. This should be rare for DKIs, but
-       as it is possible we just retry until we succeed. */
-  }
-
-  d2 = GNUNET_new (struct TALER_MINTDB_DenominationKeyIssueInformation);
-  d2->issue = dki->issue;
-  d2->denom_priv.rsa_private_key
-    = GNUNET_CRYPTO_rsa_private_key_dup (dki->denom_priv.rsa_private_key);
-  d2->denom_pub.rsa_public_key
-    = GNUNET_CRYPTO_rsa_public_key_dup (dki->denom_pub.rsa_public_key);
-  res = GNUNET_CONTAINER_multihashmap_put (ctx->denomkey_map,
-                                           &denom_key_hash,
-                                           d2,
-                                           GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
-  if (GNUNET_OK != res)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                "Duplicate denomination key `%s'\n",
-                alias);
-    GNUNET_CRYPTO_rsa_private_key_free (d2->denom_priv.rsa_private_key);
-    GNUNET_CRYPTO_rsa_public_key_free (d2->denom_pub.rsa_public_key);
-    GNUNET_free (d2);
-    return GNUNET_OK;
-  }
-  json_array_append_new (ctx->denom_keys_array,
-                         denom_key_issue_to_json (&dki->denom_pub,
-                                                  &dki->issue));
-  return GNUNET_OK;
-}
-
-
-/**
- * Convert the public part of a sign key issue to a JSON object.
- *
- * @param ski the sign key issue
- * @return a JSON object describing the sign key issue (public part)
- */
-static json_t *
-sign_key_issue_to_json (const struct TALER_MintSigningKeyValidityPS *ski)
-{
-  return
-    json_pack ("{s:o, s:o, s:o, s:o, s:o, s:o}",
-               "stamp_start",
-               TALER_json_from_abs (GNUNET_TIME_absolute_ntoh (ski->start)),
-               "stamp_expire",
-               TALER_json_from_abs (GNUNET_TIME_absolute_ntoh (ski->expire)),
-               "stamp_end",
-               TALER_json_from_abs (GNUNET_TIME_absolute_ntoh (ski->end)),
-               "master_pub",
-               TALER_json_from_data (&ski->master_public_key,
-                                     sizeof (struct TALER_MasterPublicKeyP)),
-               "master_sig",
-               TALER_json_from_data (&ski->signature,
-                                     sizeof (struct TALER_MasterSignatureP)),
-               "key",
-               TALER_json_from_data (&ski->signkey_pub,
-                                     sizeof (struct TALER_MintPublicKeyP)));
-}
-
-
-/**
- * Iterator for sign keys.
- *
- * @param cls closure with the `struct TMH_KS_StateHandle *`
- * @param filename name of the file the key came from
- * @param ski the sign key issue
- * @return #GNUNET_OK to continue to iterate,
- *  #GNUNET_NO to stop iteration with no error,
- *  #GNUNET_SYSERR to abort iteration with error!
- */
-static int
-reload_keys_sign_iter (void *cls,
-                       const char *filename,
-                       const struct TALER_MINTDB_PrivateSigningKeyInformationP *ski)
-{
-  struct TMH_KS_StateHandle *ctx = cls;
-  struct GNUNET_TIME_Absolute now;
-  struct GNUNET_TIME_Absolute horizon;
-
-  horizon = GNUNET_TIME_relative_to_absolute (TALER_MINT_conf_duration_provide ());
-  if (GNUNET_TIME_absolute_ntoh (ski->issue.start).abs_value_us >
-      horizon.abs_value_us)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-                "Skipping future signing key `%s'\n",
-                filename);
-    return GNUNET_OK;
-  }
-  now = GNUNET_TIME_absolute_get ();
-  if (GNUNET_TIME_absolute_ntoh (ski->issue.expire).abs_value_us <
-      now.abs_value_us)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-                "Skipping expired signing key `%s'\n",
-                filename);
-    return GNUNET_OK;
-  }
-
-  /* The signkey is valid at this time, check if it's more recent than
-     what we have so far! */
-  if ( (GNUNET_TIME_absolute_ntoh (ctx->current_sign_key_issue.issue.start).abs_value_us <
-        GNUNET_TIME_absolute_ntoh (ski->issue.start).abs_value_us) &&
-       (GNUNET_TIME_absolute_ntoh (ski->issue.start).abs_value_us <
-        now.abs_value_us) )
-  {
-    /* We use the most recent one, if it is valid now (not just in the near future) */
-    ctx->current_sign_key_issue = *ski;
-  }
-  json_array_append_new (ctx->sign_keys_array,
-                         sign_key_issue_to_json (&ski->issue));
-
-  return GNUNET_OK;
-}
-
-
-/**
- * Convert information from an auditor to a JSON object.
- *
- * @param apub the auditor's public key
- * @param dki_len length of @a dki and @a asigs arrays
- * @param asigs the auditor's signatures
- * @param dki array of denomination coin data signed by the auditor
- * @return a JSON object describing the auditor information and signature
- */
-static json_t *
-auditor_to_json (const struct TALER_AuditorPublicKeyP *apub,
-                 unsigned int dki_len,
-                 const struct TALER_AuditorSignatureP **asigs,
-                 const struct TALER_DenominationKeyValidityPS **dki)
-{
-  unsigned int i;
-  json_t *ja;
-
-  ja = json_array ();
-  for (i=0;i<dki_len;i++)
-    json_array_append_new (ja,
-                           json_pack ("{s:o, s:o}",
-                                      "denom_pub_h",
-                                      TALER_json_from_data (&dki[i]->denom_hash,
-                                                            sizeof (struct GNUNET_HashCode)),
-                                      "auditor_sig",
-                                      TALER_json_from_data (asigs[i],
-                                                            sizeof (struct TALER_AuditorSignatureP))));
-  return
-    json_pack ("{s:o, s:o}",
-               "denomination_keys", ja,
-               "auditor_pub",
-               TALER_json_from_data (apub,
-                                     sizeof (struct TALER_AuditorPublicKeyP)));
-}
-
-
-/**
- * @brief Iterator called with auditor information.
- * Check that the @a mpub actually matches this mint, and then
- * add the auditor information to our /keys response (if it is
- * (still) applicable).
- *
- * @param cls closure with the `struct TMH_KS_StateHandle *`
- * @param apub the auditor's public key
- * @param mpub the mint's public key (as expected by the auditor)
- * @param dki_len length of @a dki and @a asigs
- * @param asigs array with the auditor's signatures, of length @a dki_len
- * @param dki array of denomination coin data signed by the auditor
- * @return #GNUNET_OK to continue to iterate,
- *  #GNUNET_NO to stop iteration with no error,
- *  #GNUNET_SYSERR to abort iteration with error!
- */
-static int
-reload_auditor_iter (void *cls,
-                     const struct TALER_AuditorPublicKeyP *apub,
-                     const struct TALER_MasterPublicKeyP *mpub,
-                     unsigned int dki_len,
-                     const struct TALER_AuditorSignatureP *asigs,
-                     const struct TALER_DenominationKeyValidityPS *dki)
-{
-  struct TMH_KS_StateHandle *ctx = cls;
-  unsigned int i;
-  unsigned int keep;
-  const struct TALER_AuditorSignatureP *kept_asigs[dki_len];
-  const struct TALER_DenominationKeyValidityPS *kept_dkis[dki_len];
-
-  /* Check if the signature is at least for this mint. */
-  if (0 != memcmp (&mpub->eddsa_pub,
-                   &TMH_master_public_key,
-                   sizeof (struct GNUNET_CRYPTO_EddsaPublicKey)))
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                "Auditing information provided for a different mint, ignored\n");
-    return GNUNET_OK;
-  }
-  /* Filter the auditor information for those for which the
-     keys actually match the denomination keys that are active right now */
-  keep = 0;
-  for (i=0;i<dki_len;i++)
-  {
-    if (GNUNET_YES ==
-        GNUNET_CONTAINER_multihashmap_contains (ctx->denomkey_map,
-                                                &dki[i].denom_hash))
-    {
-      kept_asigs[keep] = &asigs[i];
-      kept_dkis[keep] = &dki[i];
-      keep++;
-    }
-  }
-  /* add auditor information to our /keys response */
-  json_array_append_new (ctx->auditors_array,
-                         auditor_to_json (apub,
-                                          keep,
-                                          kept_asigs,
-                                          kept_dkis));
-  return GNUNET_OK;
-}
-
-
-/**
- * Iterator for freeing denomination keys.
- *
- * @param cls closure with the `struct TMH_KS_StateHandle`
- * @param key key for the denomination key
- * @param value coin details
- * @return #GNUNET_OK to continue to iterate,
- *  #GNUNET_NO to stop iteration with no error,
- *  #GNUNET_SYSERR to abort iteration with error!
- */
-static int
-free_denom_key (void *cls,
-                const struct GNUNET_HashCode *key,
-                void *value)
-{
-  struct TALER_MINTDB_DenominationKeyIssueInformation *dki = value;
-
-  GNUNET_CRYPTO_rsa_private_key_free (dki->denom_priv.rsa_private_key);
-  GNUNET_CRYPTO_rsa_public_key_free (dki->denom_pub.rsa_public_key);
-  GNUNET_free (dki);
-  return GNUNET_OK;
-}
-
-
-/**
- * Release key state, free if necessary (if reference count gets to zero).
- * Internal method used when the mutex is already held.
- *
- * @param key_state the key state to release
- */
-static void
-ks_release_ (struct TMH_KS_StateHandle *key_state)
-{
-  GNUNET_assert (0 < key_state->refcnt);
-  key_state->refcnt--;
-  if (0 == key_state->refcnt)
-  {
-    if (NULL != key_state->denom_keys_array)
-    {
-      json_decref (key_state->denom_keys_array);
-      key_state->denom_keys_array = NULL;
-    }
-    if (NULL != key_state->sign_keys_array)
-    {
-      json_decref (key_state->sign_keys_array);
-      key_state->sign_keys_array = NULL;
-    }
-    if (NULL != key_state->denomkey_map)
-    {
-      GNUNET_CONTAINER_multihashmap_iterate (key_state->denomkey_map,
-                                             &free_denom_key,
-                                             key_state);
-      GNUNET_CONTAINER_multihashmap_destroy (key_state->denomkey_map);
-      key_state->denomkey_map = NULL;
-    }
-    GNUNET_free_non_null (key_state->keys_json);
-    GNUNET_free (key_state);
-  }
-}
-
-
-/**
- * Release key state, free if necessary (if reference count gets to zero).
- *
- * @param location name of the function in which the lock is acquired
- * @param key_state the key state to release
- */
-void
-TMH_KS_release_ (const char *location,
-                 struct TMH_KS_StateHandle *key_state)
-{
-  GNUNET_assert (0 == pthread_mutex_lock (&internal_key_state_mutex));
-  ks_release_ (key_state);
-  GNUNET_assert (0 == pthread_mutex_unlock (&internal_key_state_mutex));
-}
-
-
-/**
- * Acquire the key state of the mint.  Updates keys if necessary.
- * For every call to #TMH_KS_acquire(), a matching call
- * to #TMH_KS_release() must be made.
- *
- * @param location name of the function in which the lock is acquired
- * @return the key state
- */
-struct TMH_KS_StateHandle *
-TMH_KS_acquire_ (const char *location)
-{
-  struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
-  struct TMH_KS_StateHandle *key_state;
-  json_t *keys;
-  struct TALER_MintKeySetPS ks;
-  struct TALER_MintSignatureP sig;
-
-  GNUNET_assert (0 == pthread_mutex_lock (&internal_key_state_mutex));
-  if ( (NULL != internal_key_state) &&
-       (internal_key_state->next_reload.abs_value_us <= now.abs_value_us) )
-  {
-    ks_release_ (internal_key_state);
-    internal_key_state = NULL;
-  }
-  if (NULL == internal_key_state)
-  {
-    key_state = GNUNET_new (struct TMH_KS_StateHandle);
-    key_state->hash_context = GNUNET_CRYPTO_hash_context_start ();
-
-
-    key_state->denom_keys_array = json_array ();
-    GNUNET_assert (NULL != key_state->denom_keys_array);
-
-    key_state->sign_keys_array = json_array ();
-    GNUNET_assert (NULL != key_state->sign_keys_array);
-
-    key_state->auditors_array = json_array ();
-    GNUNET_assert (NULL != key_state->auditors_array);
-
-    key_state->denomkey_map = GNUNET_CONTAINER_multihashmap_create (32,
-                                                                    GNUNET_NO);
-    key_state->reload_time = GNUNET_TIME_absolute_get ();
-    TALER_round_abs_time (&key_state->reload_time);
-    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-                "Loading keys from `%s'\n",
-                TMH_mint_directory);
-    TALER_MINTDB_denomination_keys_iterate (TMH_mint_directory,
-                                            &reload_keys_denom_iter,
-                                            key_state);
-    TALER_MINTDB_signing_keys_iterate (TMH_mint_directory,
-                                       &reload_keys_sign_iter,
-                                       key_state);
-    TALER_MINTDB_auditor_iterate (TMH_mint_directory,
-                                  &reload_auditor_iter,
-                                  key_state);
-    ks.purpose.size = htonl (sizeof (ks));
-    ks.purpose.purpose = htonl (TALER_SIGNATURE_MINT_KEY_SET);
-    ks.list_issue_date = GNUNET_TIME_absolute_hton (key_state->reload_time);
-    GNUNET_CRYPTO_hash_context_finish (key_state->hash_context,
-                                       &ks.hc);
-    key_state->hash_context = NULL;
-    GNUNET_assert (GNUNET_OK ==
-                   GNUNET_CRYPTO_eddsa_sign (&key_state->current_sign_key_issue.signkey_priv.eddsa_priv,
-                                             &ks.purpose,
-                                             &sig.eddsa_signature));
-    key_state->next_reload = GNUNET_TIME_absolute_ntoh (key_state->current_sign_key_issue.issue.expire);
-    if (0 == key_state->next_reload.abs_value_us)
-      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                  "No valid signing key found!\n");
-
-    keys = json_pack ("{s:o, s:o, s:o, s:o, s:o, s:o, s:o}",
-                      "master_public_key",
-                      TALER_json_from_data (&TMH_master_public_key,
-                                            sizeof (struct GNUNET_CRYPTO_EddsaPublicKey)),
-                      "signkeys", key_state->sign_keys_array,
-                      "denoms", key_state->denom_keys_array,
-                      "auditors", key_state->auditors_array,
-                      "list_issue_date", TALER_json_from_abs (key_state->reload_time),
-                      "eddsa_pub", TALER_json_from_data (&key_state->current_sign_key_issue.issue.signkey_pub,
-                                                         sizeof (struct TALER_MintPublicKeyP)),
-                      "eddsa_sig", TALER_json_from_data (&sig,
-                                                         sizeof (struct TALER_MintSignatureP)));
-    key_state->auditors_array = NULL;
-    key_state->sign_keys_array = NULL;
-    key_state->denom_keys_array = NULL;
-    key_state->keys_json = json_dumps (keys,
-                                       JSON_INDENT (2));
-    json_decref (keys);
-    internal_key_state = key_state;
-  }
-  key_state = internal_key_state;
-  key_state->refcnt++;
-  GNUNET_assert (0 == pthread_mutex_unlock (&internal_key_state_mutex));
-
-  return key_state;
-}
-
-
-/**
- * Look up the issue for a denom public key.
- *
- * @param key_state state to look in
- * @param denom_pub denomination public key
- * @param use purpose for which the key is being located
- * @return the denomination key issue,
- *         or NULL if denom_pub could not be found
- */
-struct TALER_MINTDB_DenominationKeyIssueInformation *
-TMH_KS_denomination_key_lookup (const struct TMH_KS_StateHandle *key_state,
-                                const struct TALER_DenominationPublicKey *denom_pub,
-				enum TMH_KS_DenominationKeyUse use)
-{
-  struct GNUNET_HashCode hc;
-  struct TALER_MINTDB_DenominationKeyIssueInformation *dki;
-  struct GNUNET_TIME_Absolute now;
-
-  GNUNET_CRYPTO_rsa_public_key_hash (denom_pub->rsa_public_key,
-                                     &hc);
-  dki = GNUNET_CONTAINER_multihashmap_get (key_state->denomkey_map,
-					   &hc);
-  if (NULL == dki)
-    return NULL;
-  now = GNUNET_TIME_absolute_get ();
-  if (now.abs_value_us <
-      GNUNET_TIME_absolute_ntoh (dki->issue.properties.start).abs_value_us)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-		"Not returning DKI for %s, as start time is in the future\n",
-		GNUNET_h2s (&hc));
-    return NULL;
-  }
-  now = GNUNET_TIME_absolute_get ();
-  switch (use)
-  {
-  case TMH_KS_DKU_WITHDRAW:
-    if (now.abs_value_us >
-	GNUNET_TIME_absolute_ntoh (dki->issue.properties.expire_withdraw).abs_value_us)
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-		  "Not returning DKI for %s, as time to create coins has passed\n",
-		  GNUNET_h2s (&hc));
-      return NULL;
-    }
-    break;
-  case TMH_KS_DKU_DEPOSIT:
-    if (now.abs_value_us >
-	GNUNET_TIME_absolute_ntoh (dki->issue.properties.expire_spend).abs_value_us)
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-		  "Not returning DKI for %s, as time to spend coin has passed\n",
-		  GNUNET_h2s (&hc));
-      return NULL;
-    }
-    break;
-  }
-  return dki;
-}
-
-
-/**
- * Handle a signal, writing relevant signal numbers to the pipe.
- *
- * @param signal_number the signal number
- */
-static void
-handle_signal (int signal_number)
-{
-  ssize_t res;
-  char c = signal_number;
-
-  res = write (reload_pipe[1],
-               &c,
-               1);
-  if ( (res < 0) &&
-       (EINTR != errno) )
-  {
-    GNUNET_break (0);
-    return;
-  }
-  if (0 == res)
-  {
-    GNUNET_break (0);
-    return;
-  }
-}
-
-
-/**
- * Call #handle_signal() to pass the received signal via
- * the control pipe.
- */
-static void
-handle_sigusr1 ()
-{
-  handle_signal (SIGUSR1);
-}
-
-
-/**
- * Call #handle_signal() to pass the received signal via
- * the control pipe.
- */
-static void
-handle_sigint ()
-{
-  handle_signal (SIGINT);
-}
-
-
-/**
- * Call #handle_signal() to pass the received signal via
- * the control pipe.
- */
-static void
-handle_sigterm ()
-{
-  handle_signal (SIGTERM);
-}
-
-
-/**
- * Call #handle_signal() to pass the received signal via
- * the control pipe.
- */
-static void
-handle_sighup ()
-{
-  handle_signal (SIGHUP);
-}
-
-
-/**
- * Call #handle_signal() to pass the received signal via
- * the control pipe.
- */
-static void
-handle_sigchld ()
-{
-  handle_signal (SIGCHLD);
-}
-
-
-/**
- * Read signals from a pipe in a loop, and reload keys from disk if
- * SIGUSR1 is received, terminate if SIGTERM/SIGINT is received, and
- * restart if SIGHUP is received.
- *
- * @return #GNUNET_SYSERR on errors,
- *         #GNUNET_OK to terminate normally
- *         #GNUNET_NO to restart an update version of the binary
- */
-int
-TMH_KS_loop (void)
-{
-  struct GNUNET_SIGNAL_Context *sigusr1;
-  struct GNUNET_SIGNAL_Context *sigterm;
-  struct GNUNET_SIGNAL_Context *sigint;
-  struct GNUNET_SIGNAL_Context *sighup;
-  struct GNUNET_SIGNAL_Context *sigchld;
-  int ret;
-
-  if (0 != pipe (reload_pipe))
-  {
-    fprintf (stderr,
-             "Failed to create pipe.\n");
-    return GNUNET_SYSERR;
-  }
-  sigusr1 = GNUNET_SIGNAL_handler_install (SIGUSR1,
-                                           &handle_sigusr1);
-  sigterm = GNUNET_SIGNAL_handler_install (SIGTERM,
-                                           &handle_sigterm);
-  sigint = GNUNET_SIGNAL_handler_install (SIGINT,
-                                          &handle_sigint);
-  sighup = GNUNET_SIGNAL_handler_install (SIGHUP,
-                                          &handle_sighup);
-  sigchld = GNUNET_SIGNAL_handler_install (SIGCHLD,
-                                           &handle_sigchld);
-
-  ret = 0;
-  while (0 == ret)
-  {
-    char c;
-    ssize_t res;
-
-    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-                "(re-)loading keys\n");
-    if (NULL != internal_key_state)
-    {
-      TMH_KS_release (internal_key_state);
-      internal_key_state = NULL;
-    }
-    /* This will re-initialize 'internal_key_state' with
-       an initial refcnt of 1 */
-    (void) TMH_KS_acquire ();
-
-read_again:
-    errno = 0;
-    res = read (reload_pipe[0],
-                &c,
-                1);
-    if ((res < 0) && (EINTR != errno))
-    {
-      GNUNET_break (0);
-      ret = GNUNET_SYSERR;
-      break;
-    }
-    if (EINTR == errno)
-      goto read_again;
-    switch (c)
-    {
-    case SIGUSR1:
-      /* reload internal key state, we do this in the loop */
-      break;
-    case SIGTERM:
-    case SIGINT:
-      /* terminate */
-      ret = GNUNET_OK;
-      break;
-    case SIGHUP:
-      /* restart updated binary */
-      ret = GNUNET_NO;
-      break;
-#if HAVE_DEVELOPER
-    case SIGCHLD:
-      /* running in test-mode, test finished, terminate */
-      ret = GNUNET_OK;
-      break;
-#endif
-    default:
-      /* unexpected character */
-      GNUNET_break (0);
-      break;
-    }
-  }
-  if (NULL != internal_key_state)
-  {
-    TMH_KS_release (internal_key_state);
-    internal_key_state = NULL;
-  }
-  GNUNET_SIGNAL_handler_uninstall (sigusr1);
-  GNUNET_SIGNAL_handler_uninstall (sigterm);
-  GNUNET_SIGNAL_handler_uninstall (sigint);
-  GNUNET_SIGNAL_handler_uninstall (sighup);
-  GNUNET_SIGNAL_handler_uninstall (sigchld);
-  return ret;
-}
-
-
-/**
- * Sign the message in @a purpose with the mint's signing key.
- *
- * @param purpose the message to sign
- * @param[out] pub set to the current public signing key of the mint
- * @param[out] sig signature over purpose using current signing key
- */
-void
-TMH_KS_sign (const struct GNUNET_CRYPTO_EccSignaturePurpose *purpose,
-             struct TALER_MintPublicKeyP *pub,
-             struct TALER_MintSignatureP *sig)
-
-{
-  struct TMH_KS_StateHandle *key_state;
-
-  key_state = TMH_KS_acquire ();
-  *pub = key_state->current_sign_key_issue.issue.signkey_pub;
-  GNUNET_assert (GNUNET_OK ==
-                 GNUNET_CRYPTO_eddsa_sign (&key_state->current_sign_key_issue.signkey_priv.eddsa_priv,
-                                           purpose,
-                                           &sig->eddsa_signature));
-  TMH_KS_release (key_state);
-}
-
-
-/**
- * Function to call to handle the request by sending
- * back static data from the @a rh.
- *
- * @param rh context of the handler
- * @param connection the MHD connection to handle
- * @param[in,out] connection_cls the connection's closure (can be updated)
- * @param upload_data upload data
- * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
- * @return MHD result code
- */
-int
-TMH_KS_handler_keys (struct TMH_RequestHandler *rh,
-                     struct MHD_Connection *connection,
-                     void **connection_cls,
-                     const char *upload_data,
-                     size_t *upload_data_size)
-{
-  struct TMH_KS_StateHandle *key_state;
-  struct MHD_Response *response;
-  int ret;
-
-  key_state = TMH_KS_acquire ();
-  response = MHD_create_response_from_buffer (strlen (key_state->keys_json),
-                                              key_state->keys_json,
-                                              MHD_RESPMEM_MUST_COPY);
-  TMH_KS_release (key_state);
-  if (NULL == response)
-  {
-    GNUNET_break (0);
-    return MHD_NO;
-  }
-  TMH_RESPONSE_add_global_headers (response);
-  (void) MHD_add_response_header (response,
-                                  "Content-Type",
-                                  rh->mime_type);
-  ret = MHD_queue_response (connection,
-                            rh->response_code,
-                            response);
-  MHD_destroy_response (response);
-  return ret;
-}
-
-
-/* end of taler-mint-httpd_keystate.c */