-initial import for mint

1 files changed, 283 insertions, 0 deletions

diff --git a/src/mint/mint_common.c b/src/mint/mint_common.c
new file mode 100644
index 000000000..4afbf072b
--- /dev/null
+++ b/src/mint/mint_common.c
@@ -0,0 +1,283 @@
+/*
+  This file is part of TALER
+  (C) 2014 Christian Grothoff (and other contributing authors)
+
+  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, If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file mint_common.c
+ * @brief Common functionality for the mint
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ * @author Sree Harsha Totakura
+ */
+
+#include "platform.h"
+#include "mint.h"
+
+struct SignkeysIterateContext
+{
+  TALER_MINT_SignkeyIterator it;
+  void *it_cls;
+};
+
+
+struct DenomkeysIterateContext
+{
+  const char *alias;
+  TALER_MINT_DenomkeyIterator it;
+  void *it_cls;
+};
+
+
+static int
+signkeys_iterate_dir_iter (void *cls,
+                           const char *filename)
+{
+
+  struct SignkeysIterateContext *skc = cls;
+  ssize_t nread;
+  struct TALER_MINT_SignKeyIssue issue;
+  nread = GNUNET_DISK_fn_read (filename,
+                               &issue,
+                               sizeof (struct TALER_MINT_SignKeyIssue));
+  if (nread != sizeof (struct TALER_MINT_SignKeyIssue))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Invalid signkey file: '%s'\n", filename);
+    return GNUNET_OK;
+  }
+  return skc->it (skc->it_cls, &issue);
+}
+
+
+int
+TALER_MINT_signkeys_iterate (const char *mint_base_dir,
+                             TALER_MINT_SignkeyIterator it, void *cls)
+{
+  char *signkey_dir;
+  size_t len;
+  struct SignkeysIterateContext skc;
+
+  len = GNUNET_asprintf (&signkey_dir, ("%s" DIR_SEPARATOR_STR DIR_SIGNKEYS), mint_base_dir);
+  GNUNET_assert (len > 0);
+
+  skc.it = it;
+  skc.it_cls = cls;
+
+  return GNUNET_DISK_directory_scan (signkey_dir, &signkeys_iterate_dir_iter, &skc);
+}
+
+
+/**
+ * Import a denomination key from the given file
+ *
+ * @param filename the file to import the key from
+ * @param dki pointer to return the imported denomination key
+ * @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
+ */
+int
+TALER_MINT_read_denom_key (const char *filename,
+                           struct TALER_MINT_DenomKeyIssue *dki)
+{
+  uint64_t size;
+  size_t offset;
+  void *data;
+  struct TALER_RSA_PrivateKey *priv;
+  int ret;
+
+  ret = GNUNET_SYSERR;
+  data = NULL;
+  offset = sizeof (struct TALER_MINT_DenomKeyIssue)
+      - offsetof (struct TALER_MINT_DenomKeyIssue, signature);
+  if (GNUNET_OK != GNUNET_DISK_file_size (filename,
+                                          &size,
+                                          GNUNET_YES,
+                                          GNUNET_YES))
+    goto cleanup;
+  if (size <= offset)
+  {
+    GNUNET_break (0);
+    goto cleanup;
+  }
+  data = GNUNET_malloc (size);
+  if (size != GNUNET_DISK_fn_read (filename,
+                                   data,
+                                   size))
+    goto cleanup;
+  if (NULL == (priv = TALER_RSA_decode_key (data + offset, size - offset)))
+    goto cleanup;
+  dki->denom_priv = priv;
+  (void) memcpy (&dki->signature, data, offset);
+  ret = GNUNET_OK;
+
+ cleanup:
+  GNUNET_free_non_null (data);
+  return ret;
+}
+
+
+/**
+ * Exports a denomination key to the given file
+ *
+ * @param filename the file where to write the denomination key
+ * @param dki the denomination key
+ * @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure.
+ */
+int
+TALER_MINT_write_denom_key (const char *filename,
+                            const struct TALER_MINT_DenomKeyIssue *dki)
+{
+  struct TALER_RSA_PrivateKeyBinaryEncoded *priv_enc;
+  struct GNUNET_DISK_FileHandle *fh;
+  ssize_t wrote;
+  size_t wsize;
+  int ret;
+
+  fh = NULL;
+  priv_enc = NULL;
+  ret = GNUNET_SYSERR;
+  if (NULL == (fh = GNUNET_DISK_file_open
+               (filename,
+                GNUNET_DISK_OPEN_WRITE | GNUNET_DISK_OPEN_CREATE | GNUNET_DISK_OPEN_TRUNCATE,
+                GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE)))
+    goto cleanup;
+  if (NULL == (priv_enc = TALER_RSA_encode_key (dki->denom_priv)))
+    goto cleanup;
+  wsize = sizeof (struct TALER_MINT_DenomKeyIssue)
+      - offsetof (struct TALER_MINT_DenomKeyIssue, signature);
+  if (GNUNET_SYSERR == (wrote = GNUNET_DISK_file_write (fh,
+                                                        &dki->signature,
+                                                        wsize)))
+    goto cleanup;
+  if (wrote != wsize)
+    goto cleanup;
+  wsize = ntohs (priv_enc->len);
+  if (GNUNET_SYSERR == (wrote = GNUNET_DISK_file_write (fh,
+                                                        priv_enc,
+                                                        wsize)))
+    goto cleanup;
+  if (wrote != wsize)
+    goto cleanup;
+  ret = GNUNET_OK;
+ cleanup:
+  GNUNET_free_non_null (priv_enc);
+  if (NULL != fh)
+    (void) GNUNET_DISK_file_close (fh);
+  return ret;
+}
+
+
+static int
+denomkeys_iterate_keydir_iter (void *cls,
+                               const char *filename)
+{
+
+  struct DenomkeysIterateContext *dic = cls;
+  struct TALER_MINT_DenomKeyIssue issue;
+
+  if (GNUNET_OK != TALER_MINT_read_denom_key (filename, &issue))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Invalid denomkey file: '%s'\n", filename);
+    return GNUNET_OK;
+  }
+  return dic->it (dic->it_cls, dic->alias, &issue);
+}
+
+
+static int
+denomkeys_iterate_topdir_iter (void *cls,
+                               const char *filename)
+{
+
+  struct DenomkeysIterateContext *dic = cls;
+  dic->alias = GNUNET_STRINGS_get_short_name (filename);
+
+  // FIXME: differentiate between error case and normal iteration abortion
+  if (0 > GNUNET_DISK_directory_scan (filename, &denomkeys_iterate_keydir_iter, dic))
+    return GNUNET_SYSERR;
+  return GNUNET_OK;
+}
+
+
+int
+TALER_MINT_denomkeys_iterate (const char *mint_base_dir,
+                              TALER_MINT_DenomkeyIterator it, void *cls)
+{
+  char *dir;
+  size_t len;
+  struct DenomkeysIterateContext dic;
+  len = GNUNET_asprintf (&dir, ("%s" DIR_SEPARATOR_STR DIR_DENOMKEYS),
+                         mint_base_dir);
+  GNUNET_assert (len > 0);
+
+  dic.it = it;
+  dic.it_cls = cls;
+
+  // scan over alias dirs
+  return GNUNET_DISK_directory_scan (dir, &denomkeys_iterate_topdir_iter, &dic);
+}
+
+
+struct GNUNET_CONFIGURATION_Handle *
+TALER_MINT_config_load (const char *mint_base_dir)
+{
+  struct GNUNET_CONFIGURATION_Handle *cfg;
+  char *cfg_dir;
+  int res;
+
+  res = GNUNET_asprintf (&cfg_dir, "%s" DIR_SEPARATOR_STR "config", mint_base_dir);
+  GNUNET_assert (res > 0);
+
+  cfg = GNUNET_CONFIGURATION_create ();
+  res = GNUNET_CONFIGURATION_load_from (cfg, cfg_dir);
+  GNUNET_free (cfg_dir);
+  if (GNUNET_OK != res)
+   return NULL;
+  return cfg;
+}
+
+int
+TALER_TALER_DB_extract_amount_nbo (PGresult *result, unsigned int row,
+                            int indices[3], struct TALER_AmountNBO *denom_nbo)
+{
+  if ((indices[0] < 0) || (indices[1] < 0) || (indices[2] < 0))
+    return GNUNET_NO;
+  if (sizeof (uint32_t) != PQgetlength (result, row, indices[0]))
+    return GNUNET_SYSERR;
+  if (sizeof (uint32_t) != PQgetlength (result, row, indices[1]))
+    return GNUNET_SYSERR;
+  if (PQgetlength (result, row, indices[2]) > TALER_CURRENCY_LEN)
+    return GNUNET_SYSERR;
+  denom_nbo->value = *(uint32_t *) PQgetvalue (result, row, indices[0]);
+  denom_nbo->fraction = *(uint32_t *) PQgetvalue (result, row, indices[1]);
+  memset (denom_nbo->currency, 0, TALER_CURRENCY_LEN);
+  memcpy (denom_nbo->currency, PQgetvalue (result, row, indices[2]), PQgetlength (result, row, indices[2]));
+  return GNUNET_OK;
+}
+
+
+int
+TALER_TALER_DB_extract_amount (PGresult *result, unsigned int row,
+                        int indices[3], struct TALER_Amount *denom)
+{
+  struct TALER_AmountNBO denom_nbo;
+  int res;
+
+  res = TALER_TALER_DB_extract_amount_nbo (result, row, indices, &denom_nbo);
+  if (GNUNET_OK != res)
+    return res;
+  *denom = TALER_amount_ntoh (denom_nbo);
+  return GNUNET_OK;
+}
+
+/* end of mint_common.c */