Merge branch 'master' of ssh://taler.net:/var/git/exchange

11 files changed, 128 insertions, 1967 deletions

diff --git a/src/util/Makefile.am b/src/util/Makefile.am
index 8efc3987..22bc788b 100644
--- a/src/util/Makefile.am
+++ b/src/util/Makefile.am
@@ -1,11 +1,32 @@
 # This Makefile.am is in the public domain
-AM_CPPFLAGS = -I$(top_srcdir)/src/include $(LIBGCRYPT_CFLAGS) $(POSTGRESQL_CPPFLAGS)
+AM_CPPFLAGS = -I$(top_srcdir)/src/include $(LIBGCRYPT_CFLAGS)
 
 if USE_COVERAGE
   AM_CFLAGS = --coverage -O0
   XLIB = -lgcov
 endif
 
+
+pkgcfgdir = $(prefix)/share/taler/config.d/
+
+pkgcfg_DATA = \
+  paths.conf
+
+EXTRA_DIST = \
+  paths.conf
+
+dist_bin_SCRIPTS = taler-config
+
+# See https://www.gnu.org/software/autoconf/manual/autoconf-2.63/html_node/Installation-Directory-Variables.html
+# for and explanation and why this ugliness is necessary.
+edit = sed -e 's|@libdir[@]|$(libdir)|g'
+taler-config: Makefile $(srcdir)/taler-config.in
+	rm -f $@ $@.tmp
+	$(edit) '$(srcdir)/$@.in' >$@.tmp
+	chmod +x $@.tmp
+	chmod a-w $@.tmp
+	mv $@.tmp $@
+
 if WALLET_ONLY
 lib_LTLIBRARIES = \
   libtalerutil_wallet.la
@@ -31,15 +52,11 @@ libtalerutil_la_SOURCES = \
   amount.c \
   crypto.c \
   util.c \
-  json.c \
-  os_installation.c \
-  plugin.c \
-  wireformats.c
+  os_installation.c
 
 libtalerutil_la_LIBADD = \
   -lgnunetutil \
   $(LIBGCRYPT_LIBS) \
-  -ljansson \
   -lmicrohttpd $(XLIB)
 
 libtalerutil_la_LDFLAGS = \
@@ -48,13 +65,11 @@ libtalerutil_la_LDFLAGS = \
 
 TESTS = \
  test_amount \
- test_crypto \
- test_json
+ test_crypto
 
-check_PROGRAMS= \
+check_PROGRAMS = \
  test_amount \
- test_crypto \
- test_json
+ test_crypto
 
 
 test_amount_SOURCES = \
@@ -68,10 +83,3 @@ test_crypto_SOURCES = \
 test_crypto_LDADD = \
   -lgnunetutil \
   libtalerutil.la
-
-test_json_SOURCES = \
-  test_json.c
-test_json_LDADD = \
-  -lgnunetutil \
-  -ljansson \
-  libtalerutil.la
diff --git a/src/util/amount.c b/src/util/amount.c
index dc2d2e40..4ac7d30a 100644
--- a/src/util/amount.c
+++ b/src/util/amount.c
@@ -151,6 +151,30 @@ TALER_string_to_amount (const char *str,
 
 
 /**
+ * Parse denomination description, in the format "T:V.F".
+ *
+ * @param str denomination description
+ * @param denom denomination to write the result to, in NBO
+ * @return #GNUNET_OK if the string is a valid denomination specification,
+ *         #GNUNET_SYSERR if it is invalid.
+ */
+int
+TALER_string_to_amount_nbo (const char *str,
+                            struct TALER_AmountNBO *denom)
+{
+  struct TALER_Amount amount;
+
+  if (GNUNET_OK !=
+      TALER_string_to_amount (str,
+                              &amount))
+    return GNUNET_SYSERR;
+  TALER_amount_hton (denom,
+                     &amount);
+  return GNUNET_OK;
+}
+
+
+/**
  * Convert amount from host to network representation.
  *
  * @param res where to store amount in network representation
diff --git a/src/util/json.c b/src/util/json.c
deleted file mode 100644
index 6aca7548..00000000
--- a/src/util/json.c
+++ /dev/null
@@ -1,400 +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 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 util/json.c
- * @brief helper functions for JSON processing using libjansson
- * @author Sree Harsha Totakura <sreeharsha@totakura.in>
- */
-#include "platform.h"
-#if HAVE_GNUNET_GNUNET_UTIL_TALER_WALLET_LIB_H
-#include <gnunet/gnunet_util_taler_wallet_lib.h>
-#endif
-#if HAVE_GNUNET_GNUNET_UTIL_LIB_H
-#include <gnunet/gnunet_util_lib.h>
-#endif
-#include "taler_util.h"
-
-/**
- * Shorthand for exit jumps.
- */
-#define EXITIF(cond)                                              \
-  do {                                                            \
-    if (cond) { GNUNET_break (0); goto EXITIF_exit; }             \
-  } while (0)
-
-/**
- * Shorthand for JSON parsing related exit jumps.
- */
-#define UNPACK_EXITIF(cond)                                             \
-  do {                                                                  \
-    if (cond) { TALER_json_warn (error); goto EXITIF_exit; }            \
-  } while (0)
-
-
-/**
- * Convert a TALER amount to a JSON
- * object.
- *
- * @param amount the amount
- * @return a json object describing the amount
- */
-json_t *
-TALER_json_from_amount (const struct TALER_Amount *amount)
-{
-  json_t *j;
-
-  if ( (amount->value != (uint64_t) ((json_int_t) amount->value)) ||
-       (0 > ((json_int_t) amount->value)) )
-  {
-    /* Theoretically, json_int_t can be a 32-bit "long", or we might
-       have a 64-bit value which converted to a 63-bit signed long
-       long causes problems here.  So we check.  Note that depending
-       on the platform, the compiler may be able to statically tell
-       that at least the first check is always false. */
-    GNUNET_break (0);
-    return NULL;
-  }
-  j = json_pack ("{s:s, s:I, s:I}",
-                 "currency", amount->currency,
-                 "value", (json_int_t) amount->value,
-                 "fraction", (json_int_t) amount->fraction);
-  GNUNET_assert (NULL != j);
-  return j;
-}
-
-
-/**
- * Convert absolute timestamp to a json string.
- *
- * @param stamp the time stamp
- * @return a json string with the timestamp in @a stamp
- */
-json_t *
-TALER_json_from_abs (struct GNUNET_TIME_Absolute stamp)
-{
-  json_t *j;
-  char *mystr;
-  int ret;
-
-  GNUNET_assert (GNUNET_OK ==
-                 TALER_round_abs_time (&stamp));
-  if (stamp.abs_value_us == GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us)
-    return json_string ("/never/");
-  ret = GNUNET_asprintf (&mystr,
-                         "/Date(%llu)/",
-                         (unsigned long long) (stamp.abs_value_us / (1000LL * 1000LL)));
-  GNUNET_assert (ret > 0);
-  j = json_string (mystr);
-  GNUNET_free (mystr);
-  return j;
-}
-
-
-/**
- * Convert RSA public key to JSON.
- *
- * @param pk public key to convert
- * @return corresponding JSON encoding
- */
-json_t *
-TALER_json_from_rsa_public_key (struct GNUNET_CRYPTO_rsa_PublicKey *pk)
-{
-  char *buf;
-  size_t buf_len;
-  json_t *ret;
-
-  buf_len = GNUNET_CRYPTO_rsa_public_key_encode (pk,
-                                                 &buf);
-  ret = TALER_json_from_data (buf,
-                              buf_len);
-  GNUNET_free (buf);
-  return ret;
-}
-
-
-/**
- * Convert JSON to RSA public key.
- *
- * @param json JSON encoding to convert
- * @return corresponding public key
- */
-struct GNUNET_CRYPTO_rsa_PublicKey *
-TALER_json_to_rsa_public_key (json_t *json)
-{
-  const char *enc;
-  char *buf;
-  size_t len;
-  size_t buf_len;
-  struct GNUNET_CRYPTO_rsa_PublicKey *pk;
-
-  buf = NULL;
-  EXITIF (NULL == (enc = json_string_value (json)));
-  len = strlen (enc);
-  buf_len =  (len * 5) / 8;
-  buf = GNUNET_malloc (buf_len);
-  EXITIF (GNUNET_OK !=
-	  GNUNET_STRINGS_string_to_data (enc,
-					 len,
-					 buf,
-					 buf_len));
-  EXITIF (NULL == (pk = GNUNET_CRYPTO_rsa_public_key_decode (buf,
-							     buf_len)));
-  GNUNET_free (buf);
-  return pk;
- EXITIF_exit:
-  GNUNET_free_non_null (buf);
-  return NULL;
-}
-
-
-/**
- * Convert JSON to RSA signature.
- *
- * @param json JSON encoding to convert
- * @return corresponding signature
- */
-struct GNUNET_CRYPTO_rsa_Signature *
-TALER_json_to_rsa_signature (json_t *json)
-{
-  const char *enc;
-  char *buf;
-  size_t len;
-  size_t buf_len;
-  struct GNUNET_CRYPTO_rsa_Signature *sig;
-
-  buf = NULL;
-  EXITIF (NULL == (enc = json_string_value (json)));
-  len = strlen (enc);
-  buf_len =  (len * 5) / 8;
-  buf = GNUNET_malloc (buf_len);
-  EXITIF (GNUNET_OK !=
-	  GNUNET_STRINGS_string_to_data (enc,
-					 len,
-					 buf,
-					 buf_len));
-  EXITIF (NULL == (sig = GNUNET_CRYPTO_rsa_signature_decode (buf,
-							     buf_len)));
-  GNUNET_free (buf);
-  return sig;
- EXITIF_exit:
-  GNUNET_free_non_null (buf);
-  return NULL;
-}
-
-
-/**
- * Convert RSA signature to JSON.
- *
- * @param sig signature to convert
- * @return corresponding JSON encoding
- */
-json_t *
-TALER_json_from_rsa_signature (struct GNUNET_CRYPTO_rsa_Signature *sig)
-{
-  char *buf;
-  size_t buf_len;
-  json_t *ret;
-
-  buf_len = GNUNET_CRYPTO_rsa_signature_encode (sig,
-                                                &buf);
-  ret = TALER_json_from_data (buf,
-                              buf_len);
-  GNUNET_free (buf);
-  return ret;
-}
-
-
-/**
- * Convert binary data to a JSON string
- * with the base32crockford encoding.
- *
- * @param data binary data
- * @param size size of @a data in bytes
- * @return json string that encodes @a data
- */
-json_t *
-TALER_json_from_data (const void *data,
-                      size_t size)
-{
-  char *buf;
-  json_t *json;
-
-  buf = GNUNET_STRINGS_data_to_string_alloc (data, size);
-  json = json_string (buf);
-  GNUNET_free (buf);
-  return json;
-}
-
-
-/**
- * Parse given JSON object to Amount
- *
- * @param json the json object representing Amount
- * @param[out] r_amount where the amount has to be written
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
-int
-TALER_json_to_amount (json_t *json,
-                      struct TALER_Amount *r_amount)
-{
-  json_int_t value;
-  json_int_t fraction;
-  const char *currency;
-
-  memset (r_amount,
-          0,
-          sizeof (struct TALER_Amount));
-  if (0 != json_unpack (json,
-                        "{s:I, s:I, s:s}",
-                        "value", &value,
-                        "fraction", &fraction,
-                        "currency", &currency))
-  {
-    char *json_enc;
-
-    if (NULL == (json_enc = json_dumps (json,
-                                        JSON_COMPACT | JSON_ENCODE_ANY)))
-    {
-      GNUNET_break (0);
-      return GNUNET_SYSERR;
-    }
-    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                "Malformed JSON amount: %s\n",
-                json_enc);
-    free (json_enc);
-    return GNUNET_SYSERR;
-  }
-  if ( (value < 0) ||
-       (fraction < 0) ||
-       (value > UINT64_MAX) ||
-       (fraction > UINT32_MAX) )
-  {
-    GNUNET_break_op (0);
-    return GNUNET_SYSERR;
-  }
-  if (strlen (currency) >= TALER_CURRENCY_LEN)
-  {
-    GNUNET_break_op (0);
-    return GNUNET_SYSERR;
-  }
-  r_amount->value = (uint64_t) value;
-  r_amount->fraction = (uint32_t) fraction;
-  strcpy (r_amount->currency, currency);
-  (void) TALER_amount_normalize (r_amount);
-  return GNUNET_OK;
-}
-
-
-/**
- * Parse given JSON object to absolute time.
- *
- * @param json the json object representing Amount
- * @param[out] abs where the amount has to be written
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
-int
-TALER_json_to_abs (json_t *json,
-                   struct GNUNET_TIME_Absolute *abs)
-{
-  const char *val;
-  unsigned long long int tval;
-
-  val = json_string_value (json);
-  if (NULL == val)
-  {
-    GNUNET_break_op (0);
-    return GNUNET_SYSERR;
-  }
-  if ( (0 == strcasecmp (val,
-                         "/forever/")) ||
-       (0 == strcasecmp (val,
-                         "/never/")) )
-  {
-    *abs = GNUNET_TIME_UNIT_FOREVER_ABS;
-    return GNUNET_OK;
-  }
-  if (1 != sscanf (val,
-                   "/Date(%llu)/",
-                   &tval))
-  {
-    GNUNET_break_op (0);
-    return GNUNET_SYSERR;
-  }
-  /* Time is in seconds in JSON, but in microseconds in GNUNET_TIME_Absolute */
-  abs->abs_value_us = tval * 1000LL * 1000LL;
-  if ( (abs->abs_value_us) / 1000LL / 1000LL != tval)
-  {
-    /* Integer overflow */
-    GNUNET_break_op (0);
-    return GNUNET_SYSERR;
-  }
-  return GNUNET_OK;
-}
-
-
-/**
- * Parse given JSON object to data
- *
- * @param json the json object representing data
- * @param out the pointer to hold the parsed data.
- * @param out_size the size of @a out
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
-int
-TALER_json_to_data (json_t *json,
-                    void *out,
-                    size_t out_size)
-{
-  const char *enc;
-  unsigned int len;
-
-  EXITIF (NULL == (enc = json_string_value (json)));
-  len = strlen (enc);
-  EXITIF (((len * 5) / 8) != out_size);
-  EXITIF (GNUNET_OK != GNUNET_STRINGS_string_to_data (enc, len, out, out_size));
-  return GNUNET_OK;
- EXITIF_exit:
-  return GNUNET_SYSERR;
-}
-
-
-/**
- * Hash a JSON for binary signing.
- *
- * @param[in] json some JSON value
- * @param[out] hc resulting hash code
- * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
- */
-int
-TALER_hash_json (json_t *json,
-                 struct GNUNET_HashCode *hc)
-{
-  char *wire_enc;
-  size_t len;
-
-  if (NULL == (wire_enc = json_dumps (json,
-                                      JSON_COMPACT | JSON_SORT_KEYS)))
-    return GNUNET_SYSERR;
-  len = strlen (wire_enc) + 1;
-  GNUNET_CRYPTO_hash (wire_enc,
-                      len,
-                      hc);
-  free (wire_enc);
-  return GNUNET_OK;
-}
-
-
-/* End of util/json.c */
diff --git a/src/util/os_installation.c b/src/util/os_installation.c
index 0eab118f..5aa34f1b 100644
--- a/src/util/os_installation.c
+++ b/src/util/os_installation.c
@@ -1,701 +1,64 @@
 /*
-     This file is part of GNUnet.
-     Copyright (C) 2006-2014 GNUnet e.V.
+     This file is part of GNU Taler.
+     Copyright (C) 2016 Inria
 
-     GNUnet is free software; you can redistribute it and/or modify
+     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.
 
-     GNUnet is distributed in the hope that it will be useful, but
+     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 GNUnet; see the file COPYING.  If not, write to the
+     along with Taler; see the file COPYING.  If not, write to the
      Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
      Boston, MA 02110-1301, USA.
 */
 
 /**
  * @file os_installation.c
- * @brief get paths used by the program; based heavily on the
- *        corresponding GNUnet file, just adapted for Taler.
- * @author Milan
+ * @brief initialize libgnunet OS subsystem for Taler.
+ * @author Christian Grothoff
  */
 #include "platform.h"
 #include <gnunet/gnunet_util_lib.h>
-#if DARWIN
-#include <mach-o/ldsyms.h>
-#include <mach-o/dyld.h>
-#elif WINDOWS
-#include <windows.h>
-#endif
 
 
-#define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
-
-#define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util", syscall, filename)
-
-
-#if LINUX
 /**
- * Try to determine path by reading /proc/PID/exe
- *
- * @return NULL on error
+ * Default project data used for installation path detection
+ * for GNU Taler.
  */
-static char *
-get_path_from_proc_maps ()
-{
-  char fn[64];
-  char line[1024];
-  char dir[1024];
-  FILE *f;
-  char *lgu;
-
-  GNUNET_snprintf (fn, sizeof (fn), "/proc/%u/maps", getpid ());
-  if (NULL == (f = FOPEN (fn, "r")))
-    return NULL;
-  while (NULL != fgets (line, sizeof (line), f))
-  {
-    if ((1 ==
-         SSCANF (line, "%*x-%*x %*c%*c%*c%*c %*x %*2x:%*2x %*u%*[ ]%1023s", dir)) &&
-        (NULL != (lgu = strstr (dir, "libtalerutil"))))
-    {
-      lgu[0] = '\0';
-      FCLOSE (f);
-      return GNUNET_strdup (dir);
-    }
-  }
-  FCLOSE (f);
-  return NULL;
-}
+static const struct GNUNET_OS_ProjectData taler_pd = {
+  .libname = "libtalerutil",
+  .project_dirname = "taler",
+  .binary_name = "taler-exchange-httpd",
+  .env_varname = "TALER_PREFIX",
+  .bug_email = "taler@gnu.org",
+  .homepage = "http://www.gnu.org/s/taler/",
+};
 
 
 /**
- * Try to determine path by reading /proc/PID/exe
- *
- * @return NULL on error
+ * Return default project data used by Taler.
  */
-static char *
-get_path_from_proc_exe ()
+const struct GNUNET_OS_ProjectData *
+TALER_project_data_default (void)
 {
-  char fn[64];
-  char lnk[1024];
-  ssize_t size;
-
-  GNUNET_snprintf (fn, sizeof (fn), "/proc/%u/exe", getpid ());
-  size = readlink (fn, lnk, sizeof (lnk) - 1);
-  if (size <= 0)
-  {
-    LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_ERROR, "readlink", fn);
-    return NULL;
-  }
-  GNUNET_assert (size < sizeof (lnk));
-  lnk[size] = '\0';
-  while ((lnk[size] != '/') && (size > 0))
-    size--;
-  /* test for being in lib/taler/libexec/ or lib/MULTIARCH/taler/libexec */
-  if ( (size > strlen ("/taler/libexec/")) &&
-       (0 == strcmp ("/taler/libexec/",
-		     &lnk[size - strlen ("/taler/libexec/")])) )
-    size -= strlen ("taler/libexec/");
-  if ((size < 4) || (lnk[size - 4] != '/'))
-  {
-    /* not installed in "/bin/" -- binary path probably useless */
-    return NULL;
-  }
-  lnk[size] = '\0';
-  return GNUNET_strdup (lnk);
+  return &taler_pd;
 }
-#endif
-
-
-#if WINDOWS
-static HINSTANCE dll_instance;
 
 
 /**
- * GNUNET_util_cl_init() in common_logging.c is preferred.
- * This function is only for thread-local storage (not used in GNUnet)
- * and hInstance saving.
+ * Initialize libtalerutil.
  */
-BOOL WINAPI
-DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
+void __attribute__ ((constructor))
+TALER_OS_init ()
 {
-  switch (fdwReason)
-  {
-    case DLL_PROCESS_ATTACH:
-      dll_instance = hinstDLL;
-      break;
-    case DLL_THREAD_ATTACH:
-      break;
-    case DLL_THREAD_DETACH:
-      break;
-    case DLL_PROCESS_DETACH:
-      break;
-  }
-  return TRUE;
+  GNUNET_OS_init (&taler_pd);
 }
 
 
-/**
- * Try to determine path with win32-specific function
- *
- * @return NULL on error
- */
-static char *
-get_path_from_module_filename ()
-{
-  size_t pathlen = 512;
-  DWORD real_pathlen;
-  wchar_t *idx;
-  wchar_t *modulepath = NULL;
-  char *upath;
-  uint8_t *u8_string;
-  size_t u8_string_length;
-
-  /* This braindead function won't tell us how much space it needs, so
-   * we start at 1024 and double the space up if it doesn't fit, until
-   * it fits, or we exceed the threshold.
-   */
-  do
-  {
-    pathlen = pathlen * 2;
-    modulepath = GNUNET_realloc (modulepath, pathlen * sizeof (wchar_t));
-    SetLastError (0);
-    real_pathlen = GetModuleFileNameW (dll_instance, modulepath, pathlen * sizeof (wchar_t));
-  } while (real_pathlen >= pathlen && pathlen < 16*1024);
-  if (real_pathlen >= pathlen)
-    GNUNET_assert (0);
-  /* To be safe */
-  modulepath[real_pathlen] = '\0';
-
-  idx = modulepath + real_pathlen;
-  while ((idx > modulepath) && (*idx != L'\\') && (*idx != L'/'))
-    idx--;
-  *idx = L'\0';
-
-  /* Now modulepath holds full path to the directory where libtalerutil is.
-   * This directory should look like <TALER_PREFIX>/bin or <TALER_PREFIX>.
-   */
-  if (wcschr (modulepath, L'/') || wcschr (modulepath, L'\\'))
-  {
-    /* At least one directory component (i.e. we're not in a root directory) */
-    wchar_t *dirname = idx;
-    while ((dirname > modulepath) && (*dirname != L'\\') && (*dirname != L'/'))
-      dirname--;
-    *dirname = L'\0';
-    if (dirname > modulepath)
-    {
-      dirname++;
-      /* Now modulepath holds full path to the parent directory of the directory
-       * where libtalerutil is.
-       * dirname holds the name of the directory where libtalerutil is.
-       */
-      if (wcsicmp (dirname, L"bin") == 0)
-      {
-        /* pass */
-      }
-      else
-      {
-        /* Roll back our changes to modulepath */
-        dirname--;
-        *dirname = L'/';
-      }
-    }
-  }
-
-  /* modulepath is TALER_PREFIX */
-  u8_string = u16_to_u8 (modulepath, wcslen (modulepath), NULL, &u8_string_length);
-  if (NULL == u8_string)
-    GNUNET_assert (0);
-
-  upath = GNUNET_malloc (u8_string_length + 1);
-  memcpy (upath, u8_string, u8_string_length);
-  upath[u8_string_length] = '\0';
-
-  free (u8_string);
-  GNUNET_free (modulepath);
-
-  return upath;
-}
-#endif
-
-
-#if DARWIN
-/**
- * Signature of the '_NSGetExecutablePath" function.
- *
- * @param buf where to write the path
- * @param number of bytes available in 'buf'
- * @return 0 on success, otherwise desired number of bytes is stored in 'bufsize'
- */
-typedef int (*MyNSGetExecutablePathProto) (char *buf, size_t * bufsize);
-
-
-/**
- * Try to obtain the path of our executable using '_NSGetExecutablePath'.
- *
- * @return NULL on error
- */
-static char *
-get_path_from_NSGetExecutablePath ()
-{
-  static char zero = '\0';
-  char *path;
-  size_t len;
-  MyNSGetExecutablePathProto func;
-
-  path = NULL;
-  if (NULL == (func =
-	       (MyNSGetExecutablePathProto) dlsym (RTLD_DEFAULT, "_NSGetExecutablePath")))
-    return NULL;
-  path = &zero;
-  len = 0;
-  /* get the path len, including the trailing \0 */
-  (void) func (path, &len);
-  if (0 == len)
-    return NULL;
-  path = GNUNET_malloc (len);
-  if (0 != func (path, &len))
-  {
-    GNUNET_free (path);
-    return NULL;
-  }
-  len = strlen (path);
-  while ((path[len] != '/') && (len > 0))
-    len--;
-  path[len] = '\0';
-  return path;
-}
-
-
-/**
- * Try to obtain the path of our executable using '_dyld_image' API.
- *
- * @return NULL on error
- */
-static char *
-get_path_from_dyld_image ()
-{
-  const char *path;
-  char *p;
-  char *s;
-  unsigned int i;
-  int c;
-
-  c = _dyld_image_count ();
-  for (i = 0; i < c; i++)
-  {
-    if (((const void *) _dyld_get_image_header (i)) != (const void *)&_mh_dylib_header)
-      continue;
-    path = _dyld_get_image_name (i);
-    if ( (NULL == path) || (0 == strlen (path)) )
-      continue;
-    p = GNUNET_strdup (path);
-    s = p + strlen (p);
-    while ((s > p) && ('/' != *s))
-      s--;
-    s++;
-    *s = '\0';
-    return p;
-  }
-  return NULL;
-}
-#endif
-
-
-/**
- * Return the actual path to a file found in the current
- * PATH environment variable.
- *
- * @param binary the name of the file to find
- * @return path to binary, NULL if not found
- */
-static char *
-get_path_from_PATH (const char *binary)
-{
-  char *path;
-  char *pos;
-  char *end;
-  char *buf;
-  const char *p;
-
-  if (NULL == (p = getenv ("PATH")))
-    return NULL;
-#if WINDOWS
-  /* On W32 look in CWD first. */
-  GNUNET_asprintf (&path, ".%c%s", PATH_SEPARATOR, p);
-#else
-  path = GNUNET_strdup (p);     /* because we write on it */
-#endif
-  buf = GNUNET_malloc (strlen (path) + strlen (binary) + 1 + 1);
-  pos = path;
-  while (NULL != (end = strchr (pos, PATH_SEPARATOR)))
-  {
-    *end = '\0';
-    sprintf (buf, "%s/%s", pos, binary);
-    if (GNUNET_DISK_file_test (buf) == GNUNET_YES)
-    {
-      pos = GNUNET_strdup (pos);
-      GNUNET_free (buf);
-      GNUNET_free (path);
-      return pos;
-    }
-    pos = end + 1;
-  }
-  sprintf (buf, "%s/%s", pos, binary);
-  if (GNUNET_YES == GNUNET_DISK_file_test (buf))
-  {
-    pos = GNUNET_strdup (pos);
-    GNUNET_free (buf);
-    GNUNET_free (path);
-    return pos;
-  }
-  GNUNET_free (buf);
-  GNUNET_free (path);
-  return NULL;
-}
-
-
-/**
- * Try to obtain the installation path using the "TALER_PREFIX" environment
- * variable.
- *
- * @return NULL on error (environment variable not set)
- */
-static char *
-get_path_from_TALER_PREFIX ()
-{
-  const char *p;
-
-  if (NULL != (p = getenv ("TALER_PREFIX")))
-    return GNUNET_strdup (p);
-  return NULL;
-}
-
-
-/**
- * @brief get the path to Taler bin/ or lib/, prefering the lib/ path
- * @author Milan
- *
- * @return a pointer to the executable path, or NULL on error
- */
-static char *
-os_get_taler_path ()
-{
-  char *ret;
-
-  if (NULL != (ret = get_path_from_TALER_PREFIX ()))
-    return ret;
-#if LINUX
-  if (NULL != (ret = get_path_from_proc_maps ()))
-    return ret;
-  /* try path *first*, before /proc/exe, as /proc/exe can be wrong */
-  if (NULL != (ret = get_path_from_PATH ("taler-mint-httpd")))
-    return ret;
-  if (NULL != (ret = get_path_from_proc_exe ()))
-    return ret;
-#endif
-#if WINDOWS
-  if (NULL != (ret = get_path_from_module_filename ()))
-    return ret;
-#endif
-#if DARWIN
-  if (NULL != (ret = get_path_from_dyld_image ()))
-    return ret;
-  if (NULL != (ret = get_path_from_NSGetExecutablePath ()))
-    return ret;
-#endif
-  if (NULL != (ret = get_path_from_PATH ("taler-mint-httpd")))
-    return ret;
-  /* other attempts here */
-  LOG (GNUNET_ERROR_TYPE_ERROR,
-       _("Could not determine installation path for %s.  Set `%s' environment variable.\n"),
-       "Taler", "TALER_PREFIX");
-  return NULL;
-}
-
-
-/**
- * @brief get the path to current app's bin/
- * @author Milan
- *
- * @return a pointer to the executable path, or NULL on error
- */
-static char *
-os_get_exec_path ()
-{
-  char *ret = NULL;
-
-#if LINUX
-  if (NULL != (ret = get_path_from_proc_exe ()))
-    return ret;
-#endif
-#if WINDOWS
-  if (NULL != (ret = get_path_from_module_filename ()))
-    return ret;
-#endif
-#if DARWIN
-  if (NULL != (ret = get_path_from_NSGetExecutablePath ()))
-    return ret;
-#endif
-  /* other attempts here */
-  return ret;
-}
-
-
-/**
- * @brief get the path to a specific Taler installation directory or,
- * with #GNUNET_OS_IPK_SELF_PREFIX, the current running apps installation directory
- * @author Milan
- * @return a pointer to the dir path (to be freed by the caller)
- */
-char *
-TALER_OS_installation_get_path (enum GNUNET_OS_InstallationPathKind dirkind)
-{
-  size_t n;
-  const char *dirname;
-  char *execpath = NULL;
-  char *tmp;
-  char *multiarch;
-  char *libdir;
-  int isbasedir;
-
-  /* if wanted, try to get the current app's bin/ */
-  if (dirkind == GNUNET_OS_IPK_SELF_PREFIX)
-    execpath = os_get_exec_path ();
-
-  /* try to get Taler's bin/ or lib/, or if previous was unsuccessful some
-   * guess for the current app */
-  if (NULL == execpath)
-    execpath = os_get_taler_path ();
-
-  if (NULL == execpath)
-    return NULL;
-
-  n = strlen (execpath);
-  if (0 == n)
-  {
-    /* should never happen, but better safe than sorry */
-    GNUNET_free (execpath);
-    return NULL;
-  }
-  /* remove filename itself */
-  while ((n > 1) && (DIR_SEPARATOR == execpath[n - 1]))
-    execpath[--n] = '\0';
-
-  isbasedir = 1;
-  if ((n > 6) &&
-      ((0 == strcasecmp (&execpath[n - 6], "/lib32")) ||
-       (0 == strcasecmp (&execpath[n - 6], "/lib64"))))
-  {
-    if ( (GNUNET_OS_IPK_LIBDIR != dirkind) &&
-	 (GNUNET_OS_IPK_LIBEXECDIR != dirkind) )
-    {
-      /* strip '/lib32' or '/lib64' */
-      execpath[n - 6] = '\0';
-      n -= 6;
-    }
-    else
-      isbasedir = 0;
-  }
-  else if ((n > 4) &&
-           ((0 == strcasecmp (&execpath[n - 4], "/bin")) ||
-            (0 == strcasecmp (&execpath[n - 4], "/lib"))))
-  {
-    /* strip '/bin' or '/lib' */
-    execpath[n - 4] = '\0';
-    n -= 4;
-  }
-  multiarch = NULL;
-  if (NULL != (libdir = strstr (execpath, "/lib/")))
-  {
-    /* test for multi-arch path of the form "PREFIX/lib/MULTIARCH/";
-       here we need to re-add 'multiarch' to lib and libexec paths later! */
-    multiarch = &libdir[5];
-    if (NULL == strchr (multiarch, '/'))
-      libdir[0] = '\0'; /* Debian multiarch format, cut of from 'execpath' but preserve in multicarch */
-    else
-      multiarch = NULL; /* maybe not, multiarch still has a '/', which is not OK */
-  }
-  /* in case this was a directory named foo-bin, remove "foo-" */
-  while ((n > 1) && (execpath[n - 1] == DIR_SEPARATOR))
-    execpath[--n] = '\0';
-  switch (dirkind)
-  {
-  case GNUNET_OS_IPK_PREFIX:
-  case GNUNET_OS_IPK_SELF_PREFIX:
-    dirname = DIR_SEPARATOR_STR;
-    break;
-  case GNUNET_OS_IPK_BINDIR:
-    dirname = DIR_SEPARATOR_STR "bin" DIR_SEPARATOR_STR;
-    break;
-  case GNUNET_OS_IPK_LIBDIR:
-    if (isbasedir)
-    {
-      GNUNET_asprintf (&tmp,
-                       "%s%s%s%s%s",
-                       execpath,
-                       DIR_SEPARATOR_STR "lib",
-                       (NULL != multiarch) ? DIR_SEPARATOR_STR : "",
-                       (NULL != multiarch) ? multiarch : "",
-                       DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR);
-      if (GNUNET_YES ==
-          GNUNET_DISK_directory_test (tmp, GNUNET_YES))
-      {
-        GNUNET_free (execpath);
-        return tmp;
-      }
-      GNUNET_free (tmp);
-      tmp = NULL;
-      if (4 == sizeof (void *))
-      {
-	dirname =
-	  DIR_SEPARATOR_STR "lib32" DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR;
-	GNUNET_asprintf (&tmp,
-                         "%s%s",
-                         execpath,
-                         dirname);
-      }
-      if (8 == sizeof (void *))
-      {
-	dirname =
-	  DIR_SEPARATOR_STR "lib64" DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR;
-	GNUNET_asprintf (&tmp,
-                         "%s%s",
-                         execpath,
-                         dirname);
-      }
-
-      if ( (NULL != tmp) &&
-           (GNUNET_YES ==
-            GNUNET_DISK_directory_test (tmp, GNUNET_YES)) )
-      {
-        GNUNET_free (execpath);
-        return tmp;
-      }
-      GNUNET_free (tmp);
-    }
-    dirname = DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR;
-    break;
-  case GNUNET_OS_IPK_DATADIR:
-    dirname =
-        DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR;
-    break;
-  case GNUNET_OS_IPK_LOCALEDIR:
-    dirname =
-        DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR "locale" DIR_SEPARATOR_STR;
-    break;
-  case GNUNET_OS_IPK_ICONDIR:
-    dirname =
-        DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR "icons" DIR_SEPARATOR_STR;
-    break;
-  case GNUNET_OS_IPK_DOCDIR:
-    dirname =
-        DIR_SEPARATOR_STR "share" DIR_SEPARATOR_STR "doc" DIR_SEPARATOR_STR \
-        "gnunet" DIR_SEPARATOR_STR;
-    break;
-  case GNUNET_OS_IPK_LIBEXECDIR:
-    if (isbasedir)
-    {
-      dirname =
-        DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR "libexec" DIR_SEPARATOR_STR;
-      GNUNET_asprintf (&tmp,
-                       "%s%s%s%s",
-                       execpath,
-                       DIR_SEPARATOR_STR "lib" DIR_SEPARATOR_STR,
-                       (NULL != multiarch) ? multiarch : "",
-                       dirname);
-      if (GNUNET_YES ==
-          GNUNET_DISK_directory_test (tmp, GNUNET_YES))
-      {
-        GNUNET_free (execpath);
-        return tmp;
-      }
-      GNUNET_free (tmp);
-      tmp = NULL;
-      if (4 == sizeof (void *))
-      {
-	dirname =
-	  DIR_SEPARATOR_STR "lib32" DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR \
-	  "libexec" DIR_SEPARATOR_STR;
-	GNUNET_asprintf (&tmp,
-                         "%s%s",
-                         execpath,
-                         dirname);
-      }
-      if (8 == sizeof (void *))
-      {
-	dirname =
-	  DIR_SEPARATOR_STR "lib64" DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR \
-	  "libexec" DIR_SEPARATOR_STR;
-	GNUNET_asprintf (&tmp,
-                         "%s%s",
-                         execpath,
-                         dirname);
-      }
-      if ( (NULL != tmp) &&
-           (GNUNET_YES ==
-            GNUNET_DISK_directory_test (tmp, GNUNET_YES)) )
-      {
-        GNUNET_free (execpath);
-        return tmp;
-      }
-
-      GNUNET_free (tmp);
-    }
-    dirname =
-      DIR_SEPARATOR_STR "taler" DIR_SEPARATOR_STR \
-      "libexec" DIR_SEPARATOR_STR;
-    break;
-  default:
-    GNUNET_free (execpath);
-    return NULL;
-  }
-  GNUNET_asprintf (&tmp,
-                   "%s%s",
-                   execpath,
-                   dirname);
-  GNUNET_free (execpath);
-  return tmp;
-}
-
-
-/**
- * Given the name of a taler-helper, taler-service or taler-daemon
- * binary, try to prefix it with the libexec/-directory to get the
- * full path.
- *
- * @param progname name of the binary
- * @return full path to the binary, if possible, otherwise copy of 'progname'
- */
-char *
-TALER_OS_get_libexec_binary_path (const char *progname)
-{
-  static char *cache;
-  char *libexecdir;
-  char *binary;
-
-  if ( (DIR_SEPARATOR == progname[0]) ||
-       (GNUNET_YES == GNUNET_STRINGS_path_is_absolute (progname, GNUNET_NO, NULL, NULL)) )
-    return GNUNET_strdup (progname);
-  if (NULL != cache)
-    libexecdir = cache;
-  else
-    libexecdir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_LIBEXECDIR);
-  if (NULL == libexecdir)
-    return GNUNET_strdup (progname);
-  GNUNET_asprintf (&binary,
-		   "%s%s",
-		   libexecdir,
-		   progname);
-  cache = libexecdir;
-  return binary;
-}
-
-
-
 /* end of os_installation.c */
diff --git a/src/util/paths.conf b/src/util/paths.conf
new file mode 100644
index 00000000..03febb0e
--- /dev/null
+++ b/src/util/paths.conf
@@ -0,0 +1,29 @@
+# This file is in the public domain.
+#
+[PATHS]
+# The PATHS section is special, as filenames including $-expression are
+# expanded using the values from PATHS or the system environment (PATHS
+# is checked first).  Taler also supports expanding $-expressions using
+# defaults with the syntax "${VAR:-default}".  Here, "default" can again
+# be a $-expression.
+#
+# We usually want $HOME for $TALER_HOME, but we allow testcases to
+# easily override this by setting $TALER_TEST_HOME.
+#
+TALER_HOME = ${TALER_TEST_HOME:-${HOME:-${USERPROFILE}}}
+
+# see XDG Base Directory Specification at
+# http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
+# for how these should be used.
+
+# Persistant data storage
+TALER_DATA_HOME = ${XDG_DATA_HOME:-$TALER_HOME/.local/share}/taler/
+
+# Configuration files
+TALER_CONFIG_HOME = ${XDG_CONFIG_HOME:-$TALER_HOME/.config}/taler/
+
+# Cached data, no big deal if lost
+TALER_CACHE_HOME = ${XDG_CACHE_HOME:-$TALER_HOME/.cache}/taler/
+
+# Runtime data (always lost on system boot)
+TALER_RUNTIME_DIR = ${TMPDIR:-${TMP:-/tmp}}/taler-system-runtime/
diff --git a/src/util/plugin.c b/src/util/plugin.c
deleted file mode 100644
index 6f8e03df..00000000
--- a/src/util/plugin.c
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
-  This file is part of TALER
-  Copyright (C) 2015 GNUnet e.V.
-
-  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 util/plugin.c
- * @brief Setup paths so that we can load Taler plugins
- * @author Christian Grothoff
- * @author Sree Harsha Totakura <sreeharsha@totakura.in>
- */
-#include "platform.h"
-#include "taler_util.h"
-#include <ltdl.h>
-
-/**
- * Libtool search path before we started.
- */
-static char *old_dlsearchpath;
-
-
-/**
- * Setup libtool paths.
- */
-void __attribute__ ((constructor))
-plugin_init ()
-{
-  int err;
-  const char *opath;
-  char *path;
-  char *cpath;
-
-  err = lt_dlinit ();
-  if (err > 0)
-  {
-    FPRINTF (stderr,
-             _("Initialization of plugin mechanism failed: %s!\n"),
-             lt_dlerror ());
-    return;
-  }
-  opath = lt_dlgetsearchpath ();
-  if (NULL != opath)
-    old_dlsearchpath = GNUNET_strdup (opath);
-  path = TALER_OS_installation_get_path (GNUNET_OS_IPK_LIBDIR);
-  if (NULL != path)
-  {
-    if (NULL != opath)
-    {
-      GNUNET_asprintf (&cpath, "%s:%s", opath, path);
-      lt_dlsetsearchpath (cpath);
-      GNUNET_free (path);
-      GNUNET_free (cpath);
-    }
-    else
-    {
-      lt_dlsetsearchpath (path);
-      GNUNET_free (path);
-    }
-  }
-}
-
-
-/**
- * Shutdown libtool.
- */
-void __attribute__ ((destructor))
-plugin_fini ()
-{
-  lt_dlsetsearchpath (old_dlsearchpath);
-  if (NULL != old_dlsearchpath)
-  {
-    GNUNET_free (old_dlsearchpath);
-    old_dlsearchpath = NULL;
-  }
-  lt_dlexit ();
-}
-
-/* end of plugin.c */
diff --git a/src/util/taler-config.in b/src/util/taler-config.in
new file mode 100644
index 00000000..eb4114c8
--- /dev/null
+++ b/src/util/taler-config.in
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+if ! type gnunet-config >/dev/null; then
+  echo "$0 needs gnunet-config to be installed"
+  exit 1
+fi
+
+# FIXME: not very portable ...
+export LD_PRELOAD=@libdir@/libtalerutil.so
+exec gnunet-config "$@"
diff --git a/src/util/test_amount.c b/src/util/test_amount.c
index 3f33334b..64047715 100644
--- a/src/util/test_amount.c
+++ b/src/util/test_amount.c
@@ -73,6 +73,19 @@ main(int argc,
   GNUNET_assert (4 == a1.value);
   GNUNET_assert (0 == a1.fraction);
 
+  /* test conversion with leading zero in fraction */
+  GNUNET_assert (GNUNET_OK ==
+		 TALER_string_to_amount ("eur:0.02",
+					 &a2));
+  GNUNET_assert (0 == strcasecmp ("eur",
+				  a2.currency));
+  GNUNET_assert (0 == a2.value);
+  GNUNET_assert (TALER_AMOUNT_FRAC_BASE / 100 * 2 == a2.fraction);
+  c = TALER_amount_to_string (&a2);
+  GNUNET_assert (0 == strcmp ("eur:0.02",
+                              c));
+  GNUNET_free (c);
+
   /* test conversion with leading space and with fraction */
   GNUNET_assert (GNUNET_OK ==
 		 TALER_string_to_amount (" eur:4.12",
diff --git a/src/util/test_json.c b/src/util/test_json.c
deleted file mode 100644
index 5e2f50fe..00000000
--- a/src/util/test_json.c
+++ /dev/null
@@ -1,182 +0,0 @@
-/*
-  This file is part of TALER
-  (C) 2015 GNUnet e.V.
-
-  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 util/test_json.c
- * @brief Tests for Taler-specific crypto logic
- * @author Christian Grothoff <christian@grothoff.org>
- */
-#include "platform.h"
-#include "taler_util.h"
-#include "taler_json_lib.h"
-
-
-/**
- * Test amount conversion from/to JSON.
- *
- * @return 0 on success
- */
-static int
-test_amount ()
-{
-  json_t *j;
-  struct TALER_Amount a1;
-  struct TALER_Amount a2;
-
-  GNUNET_assert (GNUNET_OK ==
-		 TALER_string_to_amount ("EUR:4.3",
-					 &a1));
-  j = TALER_json_from_amount (&a1);
-  GNUNET_assert (NULL != j);
-  GNUNET_assert (GNUNET_OK ==
-		 TALER_json_to_amount (j,
-				       &a2));
-  GNUNET_assert (0 ==
-		 TALER_amount_cmp (&a1,
-				   &a2));
-  json_decref (j);
-  return 0;
-}
-
-
-/**
- * Test time conversion from/to JSON.
- *
- * @return 0 on success
- */
-static int
-test_time ()
-{
-  json_t *j;
-  struct GNUNET_TIME_Absolute a1;
-  struct GNUNET_TIME_Absolute a2;
-
-  a1 = GNUNET_TIME_absolute_get ();
-  TALER_round_abs_time (&a1);
-  j = TALER_json_from_abs (a1);
-  GNUNET_assert (NULL != j);
-  GNUNET_assert (GNUNET_OK ==
-		 TALER_json_to_abs (j,
-				    &a2));
-  GNUNET_assert (a1.abs_value_us ==
-		 a2.abs_value_us);
-  json_decref (j);
-
-  a1 = GNUNET_TIME_UNIT_FOREVER_ABS;
-  j = TALER_json_from_abs (a1);
-  GNUNET_assert (NULL != j);
-  GNUNET_assert (GNUNET_OK ==
-		 TALER_json_to_abs (j,
-				    &a2));
-  GNUNET_assert (a1.abs_value_us ==
-		 a2.abs_value_us);
-  json_decref (j);
-  return 0;
-}
-
-
-/**
- * Test raw (binary) conversion from/to JSON.
- *
- * @return 0 on success
- */
-static int
-test_raw ()
-{
-  char blob[256];
-  char blob2[256];
-  unsigned int i;
-  json_t *j;
-
-  for (i=0;i<=256;i++)
-  {
-    memset (blob, i, i);
-    j = TALER_json_from_data (blob, i);
-    GNUNET_assert (NULL != j);
-    GNUNET_assert (GNUNET_OK ==
-		   TALER_json_to_data (j,
-				       blob2,
-				       i));
-    GNUNET_assert (0 ==
-		   memcmp (blob,
-			   blob2,
-			   i));
-  }
-  return 0;
-}
-
-
-/**
- * Test rsa conversions from/to JSON.
- *
- * @return 0 on success
- */
-static int
-test_rsa ()
-{
-  struct GNUNET_CRYPTO_rsa_PublicKey *pub;
-  struct GNUNET_CRYPTO_rsa_PublicKey *pub2;
-  struct GNUNET_CRYPTO_rsa_Signature *sig;
-  struct GNUNET_CRYPTO_rsa_Signature *sig2;
-  struct GNUNET_CRYPTO_rsa_PrivateKey *priv;
-  char msg[] = "Hello";
-  json_t *jp;
-  json_t *js;
-
-  priv = GNUNET_CRYPTO_rsa_private_key_create (1024);
-  pub = GNUNET_CRYPTO_rsa_private_key_get_public (priv);
-  sig = GNUNET_CRYPTO_rsa_sign (priv,
-				msg,
-				sizeof (msg));
-  GNUNET_assert (NULL != (jp = TALER_json_from_rsa_public_key (pub)));
-  GNUNET_assert (NULL != (js = TALER_json_from_rsa_signature (sig)));
-  GNUNET_assert (NULL != (pub2 = TALER_json_to_rsa_public_key (jp)));
-  GNUNET_assert (NULL != (sig2 = TALER_json_to_rsa_signature (js)));
-  GNUNET_break (0 ==
-		GNUNET_CRYPTO_rsa_signature_cmp (sig,
-						 sig2));
-  GNUNET_break (0 ==
-		GNUNET_CRYPTO_rsa_public_key_cmp (pub,
-						  pub2));
-  GNUNET_CRYPTO_rsa_signature_free (sig);
-  GNUNET_CRYPTO_rsa_signature_free (sig2);
-  GNUNET_CRYPTO_rsa_private_key_free (priv);
-  GNUNET_CRYPTO_rsa_public_key_free (pub);
-  GNUNET_CRYPTO_rsa_public_key_free (pub2);
-  return 0;
-}
-
-
-int
-main(int argc,
-     const char *const argv[])
-{
-  GNUNET_log_setup ("test-json",
-		    "WARNING",
-		    NULL);
-  if (0 != test_amount ())
-    return 1;
-  if (0 != test_time ())
-    return 1;
-  if (0 != test_raw ())
-    return 1;
-  if (0 != test_rsa ())
-    return 1;
-  /* FIXME: test EdDSA signature conversion... */
-  return 0;
-}
-
-/* end of test_json.c */
diff --git a/src/util/util.c b/src/util/util.c
index addafacf..d5fa8c05 100644
--- a/src/util/util.c
+++ b/src/util/util.c
@@ -56,7 +56,7 @@ TALER_b2s (const void *buf,
   GNUNET_free (tmp);
   ret[8] = '\0';
   return ret;
-}	   
+}
 
 
 /**
@@ -89,179 +89,4 @@ TALER_config_get_denom (struct GNUNET_CONFIGURATION_Handle *cfg,
 }
 
 
-/**
- * Round a time value so that it is suitable for transmission
- * via JSON encodings.
- *
- * @param at time to round
- * @return #GNUNET_OK if time was already rounded, #GNUNET_NO if
- *         it was just now rounded
- */
-int
-TALER_round_abs_time (struct GNUNET_TIME_Absolute *at)
-{
-  if (at->abs_value_us == GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us)
-    return GNUNET_OK;
-  if (0 == at->abs_value_us % 1000000)
-    return GNUNET_OK;
-  at->abs_value_us -= at->abs_value_us % 1000000;
-  return GNUNET_NO;
-}
-
-
-/**
- * Round a time value so that it is suitable for transmission
- * via JSON encodings.
- *
- * @param rt time to round
- * @return #GNUNET_OK if time was already rounded, #GNUNET_NO if
- *         it was just now rounded
- */
-int
-TALER_round_rel_time (struct GNUNET_TIME_Relative *rt)
-{
-  if (rt->rel_value_us == GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us)
-    return GNUNET_OK;
-  if (0 == rt->rel_value_us % 1000000)
-    return GNUNET_OK;
-  rt->rel_value_us -= rt->rel_value_us % 1000000;
-  return GNUNET_NO;
-}
-
-
-/**
- * Load configuration by parsing all configuration
- * files in the given directory.
- *
- * @param base_dir directory with the configuration files
- * @return NULL on error, otherwise configuration
- */
-struct GNUNET_CONFIGURATION_Handle *
-TALER_config_load (const char *base_dir)
-{
-  struct GNUNET_CONFIGURATION_Handle *cfg;
-  char *cfg_dir;
-  int res;
-
-  res = GNUNET_asprintf (&cfg_dir,
-                         "%s" DIR_SEPARATOR_STR "config",
-                         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;
-}
-
-
-
-/**
- * At what offset does the help text start?
- */
-#define BORDER 29
-
-/**
- * Print out details on command line options (implements --help).
- *
- * @param ctx command line processing context
- * @param scls additional closure (points to about text)
- * @param option name of the option
- * @param value not used (NULL)
- * @return #GNUNET_NO (do not continue, not an error)
- */
-int
-TALER_GETOPT_format_help_ (struct GNUNET_GETOPT_CommandLineProcessorContext *ctx,
-			   void *scls,
-			   const char *option,
-			   const char *value)
-{
-  const char *about = scls;
-  size_t slen;
-  unsigned int i;
-  int j;
-  size_t ml;
-  size_t p;
-  char *scp;
-  const char *trans;
-  const struct GNUNET_GETOPT_CommandLineOption *opt;
-
-  if (NULL != about)
-  {
-    printf ("%s\n%s\n",
-	    ctx->binaryOptions,
-	    gettext (about));
-    printf (_("Arguments mandatory for long options are also mandatory for short options.\n"));
-  }
-  opt = ctx->allOptions;
-  for (i=0;NULL != opt[i].description;i++)
-  {
-    if (opt[i].shortName == '\0')
-      printf ("      ");
-    else
-      printf ("  -%c, ", opt[i].shortName);
-    printf ("--%s", opt[i].name);
-    slen = 8 + strlen (opt[i].name);
-    if (opt[i].argumentHelp != NULL)
-    {
-      printf ("=%s", opt[i].argumentHelp);
-      slen += 1 + strlen (opt[i].argumentHelp);
-    }
-    if (slen > BORDER)
-    {
-      printf ("\n%*s", BORDER, "");
-      slen = BORDER;
-    }
-    if (slen < BORDER)
-    {
-      printf ("%*s", (int) (BORDER - slen), "");
-      slen = BORDER;
-    }
-    if (0 < strlen (opt[i].description))
-      trans = gettext (opt[i].description);
-    else
-      trans = "";
-    ml = strlen (trans);
-    p = 0;
-OUTER:
-    while (ml - p > 78 - slen)
-    {
-      for (j = p + 78 - slen; j > p; j--)
-      {
-        if (isspace ((unsigned char) trans[j]))
-        {
-          scp = GNUNET_malloc (j - p + 1);
-          memcpy (scp, &trans[p], j - p);
-          scp[j - p] = '\0';
-          printf ("%s\n%*s", scp, BORDER + 2, "");
-          GNUNET_free (scp);
-          p = j + 1;
-          slen = BORDER + 2;
-          goto OUTER;
-        }
-      }
-      /* could not find space to break line */
-      scp = GNUNET_malloc (78 - slen + 1);
-      memcpy (scp, &trans[p], 78 - slen);
-      scp[78 - slen] = '\0';
-      printf ("%s\n%*s", scp, BORDER + 2, "");
-      GNUNET_free (scp);
-      slen = BORDER + 2;
-      p = p + 78 - slen;
-    }
-    /* print rest */
-    if (p < ml)
-      printf ("%s\n", &trans[p]);
-    if (strlen (trans) == 0)
-      printf ("\n");
-  }
-  printf ("Report bugs to taler@gnu.org.\n"
-          "Taler home page: http://www.gnu.org/software/taler/\n"
-          "General help using GNU software: http://www.gnu.org/gethelp/\n");
-  return GNUNET_NO;
-}
-
-
-
 /* end of util.c */
diff --git a/src/util/wireformats.c b/src/util/wireformats.c
deleted file mode 100644
index cd5a9c3d..00000000
--- a/src/util/wireformats.c
+++ /dev/null
@@ -1,441 +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 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 util/wireformats.c
- * @brief helper functions for JSON processing using libjansson
- * @author Sree Harsha Totakura <sreeharsha@totakura.in>
- * @author Christian Grothoff
- */
-#include "platform.h"
-#include <gnunet/gnunet_util_lib.h>
-#include "taler_util.h"
-
-/**
- * Shorthand for exit jumps.
- */
-#define EXITIF(cond)                                              \
-  do {                                                            \
-    if (cond) { GNUNET_break (0); goto EXITIF_exit; }             \
-  } while (0)
-
-/**
- * Shorthand for JSON parsing related exit jumps.
- */
-#define UNPACK_EXITIF(cond)                                             \
-  do {                                                                  \
-    if (cond) { TALER_json_warn (error); goto EXITIF_exit; }            \
-  } while (0)
-
-
-/* Taken from GNU gettext */
-
-/**
- * Entry in the country table.
- */
-struct table_entry
-{
-  /**
-   * 2-Character international country code.
-   */
-  const char *code;
-
-  /**
-   * Long English name of the country.
-   */
-  const char *english;
-};
-
-/* Keep the following table in sync with gettext.
-   WARNING: the entries should stay sorted according to the code */
-/**
- * List of country codes.
- */
-static const struct table_entry country_table[] =
-  {
-    { "AE", "U.A.E." },
-    { "AF", "Afghanistan" },
-    { "AL", "Albania" },
-    { "AM", "Armenia" },
-    { "AN", "Netherlands Antilles" },
-    { "AR", "Argentina" },
-    { "AT", "Austria" },
-    { "AU", "Australia" },
-    { "AZ", "Azerbaijan" },
-    { "BA", "Bosnia and Herzegovina" },
-    { "BD", "Bangladesh" },
-    { "BE", "Belgium" },
-    { "BG", "Bulgaria" },
-    { "BH", "Bahrain" },
-    { "BN", "Brunei Darussalam" },
-    { "BO", "Bolivia" },
-    { "BR", "Brazil" },
-    { "BT", "Bhutan" },
-    { "BY", "Belarus" },
-    { "BZ", "Belize" },
-    { "CA", "Canada" },
-    { "CG", "Congo" },
-    { "CH", "Switzerland" },
-    { "CI", "Cote d'Ivoire" },
-    { "CL", "Chile" },
-    { "CM", "Cameroon" },
-    { "CN", "People's Republic of China" },
-    { "CO", "Colombia" },
-    { "CR", "Costa Rica" },
-    { "CS", "Serbia and Montenegro" },
-    { "CZ", "Czech Republic" },
-    { "DE", "Germany" },
-    { "DK", "Denmark" },
-    { "DO", "Dominican Republic" },
-    { "DZ", "Algeria" },
-    { "EC", "Ecuador" },
-    { "EE", "Estonia" },
-    { "EG", "Egypt" },
-    { "ER", "Eritrea" },
-    { "ES", "Spain" },
-    { "ET", "Ethiopia" },
-    { "FI", "Finland" },
-    { "FO", "Faroe Islands" },
-    { "FR", "France" },
-    { "GB", "United Kingdom" },
-    { "GD", "Caribbean" },
-    { "GE", "Georgia" },
-    { "GL", "Greenland" },
-    { "GR", "Greece" },
-    { "GT", "Guatemala" },
-    { "HK", "Hong Kong" },
-    { "HK", "Hong Kong S.A.R." },
-    { "HN", "Honduras" },
-    { "HR", "Croatia" },
-    { "HT", "Haiti" },
-    { "HU", "Hungary" },
-    { "ID", "Indonesia" },
-    { "IE", "Ireland" },
-    { "IL", "Israel" },
-    { "IN", "India" },
-    { "IQ", "Iraq" },
-    { "IR", "Iran" },
-    { "IS", "Iceland" },
-    { "IT", "Italy" },
-    { "JM", "Jamaica" },
-    { "JO", "Jordan" },
-    { "JP", "Japan" },
-    { "KE", "Kenya" },
-    { "KG", "Kyrgyzstan" },
-    { "KH", "Cambodia" },
-    { "KR", "South Korea" },
-    { "KW", "Kuwait" },
-    { "KZ", "Kazakhstan" },
-    { "LA", "Laos" },
-    { "LB", "Lebanon" },
-    { "LI", "Liechtenstein" },
-    { "LK", "Sri Lanka" },
-    { "LT", "Lithuania" },
-    { "LU", "Luxembourg" },
-    { "LV", "Latvia" },
-    { "LY", "Libya" },
-    { "MA", "Morocco" },
-    { "MC", "Principality of Monaco" },
-    { "MD", "Moldava" },
-    { "MD", "Moldova" },
-    { "ME", "Montenegro" },
-    { "MK", "Former Yugoslav Republic of Macedonia" },
-    { "ML", "Mali" },
-    { "MM", "Myanmar" },
-    { "MN", "Mongolia" },
-    { "MO", "Macau S.A.R." },
-    { "MT", "Malta" },
-    { "MV", "Maldives" },
-    { "MX", "Mexico" },
-    { "MY", "Malaysia" },
-    { "NG", "Nigeria" },
-    { "NI", "Nicaragua" },
-    { "NL", "Netherlands" },
-    { "NO", "Norway" },
-    { "NP", "Nepal" },
-    { "NZ", "New Zealand" },
-    { "OM", "Oman" },
-    { "PA", "Panama" },
-    { "PE", "Peru" },
-    { "PH", "Philippines" },
-    { "PK", "Islamic Republic of Pakistan" },
-    { "PL", "Poland" },
-    { "PR", "Puerto Rico" },
-    { "PT", "Portugal" },
-    { "PY", "Paraguay" },
-    { "QA", "Qatar" },
-    { "RE", "Reunion" },
-    { "RO", "Romania" },
-    { "RS", "Serbia" },
-    { "RU", "Russia" },
-    { "RW", "Rwanda" },
-    { "SA", "Saudi Arabia" },
-    { "SE", "Sweden" },
-    { "SG", "Singapore" },
-    { "SI", "Slovenia" },
-    { "SK", "Slovak" },
-    { "SN", "Senegal" },
-    { "SO", "Somalia" },
-    { "SR", "Suriname" },
-    { "SV", "El Salvador" },
-    { "SY", "Syria" },
-    { "TH", "Thailand" },
-    { "TJ", "Tajikistan" },
-    { "TM", "Turkmenistan" },
-    { "TN", "Tunisia" },
-    { "TR", "Turkey" },
-    { "TT", "Trinidad and Tobago" },
-    { "TW", "Taiwan" },
-    { "TZ", "Tanzania" },
-    { "UA", "Ukraine" },
-    { "US", "United States" },
-    { "UY", "Uruguay" },
-    { "VA", "Vatican" },
-    { "VE", "Venezuela" },
-    { "VN", "Viet Nam" },
-    { "YE", "Yemen" },
-    { "ZA", "South Africa" },
-    { "ZW", "Zimbabwe" }
-  };
-
-
-/**
- * Country code comparator function, for binary search with bsearch().
- *
- * @param ptr1 pointer to a `struct table_entry`
- * @param ptr2 pointer to a `struct table_entry`
- * @return result of strncmp()'ing the 2-digit country codes of the entries
- */
-static int
-cmp_country_code (const void *ptr1,
-                  const void *ptr2)
-{
-  const struct table_entry *cc1 = ptr1;
-  const struct table_entry *cc2 = ptr2;
-
-  return strncmp (cc1->code, cc2->code, 2);
-}
-
-
-/**
- * Validates given IBAN according to the European Banking Standards.  See:
- * http://www.europeanpaymentscouncil.eu/documents/ECBS%20IBAN%20standard%20EBS204_V3.2.pdf
- *
- * @param iban the IBAN number to validate
- * @return #GNUNET_YES if correctly formatted; #GNUNET_NO if not
- */
-static int
-validate_iban (const char *iban)
-{
-  char cc[2];
-  char ibancpy[35];
-  struct table_entry cc_entry;
-  unsigned int len;
-  char *nbuf;
-  unsigned int i;
-  unsigned int j;
-  unsigned long long dividend;
-  unsigned long long remainder;
-  int nread;
-  int ret;
-
-  len = strlen (iban);
-  if (len > 34)
-    return GNUNET_NO;
-  strncpy (cc, iban, 2);
-  strncpy (ibancpy, iban + 4, len - 4);
-  strncpy (ibancpy + len - 4, iban, 4);
-  ibancpy[len] = '\0';
-  cc_entry.code = cc;
-  cc_entry.english = NULL;
-  if (NULL ==
-      bsearch (&cc_entry,
-               country_table,
-               sizeof (country_table) / sizeof (struct table_entry),
-               sizeof (struct table_entry),
-               &cmp_country_code))
-    return GNUNET_NO;
-  nbuf = GNUNET_malloc ((len * 2) + 1);
-  for (i=0, j=0; i < len; i++)
-  {
-    if (isalpha ((int) ibancpy[i]))
-    {
-      EXITIF(2 != snprintf(&nbuf[j],
-                           3,
-                           "%2u",
-                           (ibancpy[i] - 'A' + 10)));
-      j += 2;
-      continue;
-    }
-    nbuf[j] = ibancpy[i];
-    j++;
-  }
-  for (j=0;'\0' != nbuf[j];j++)
-    GNUNET_assert (isdigit(nbuf[j]));
-  GNUNET_assert (sizeof(dividend) >= 8);
-  remainder = 0;
-  for (i=0; i<j; i+=16)
-  {
-    EXITIF (1 !=
-            (ret = sscanf (&nbuf[i],
-                           "%16llu %n",
-                           &dividend,
-                           &nread)));
-    if (0 != remainder)
-      dividend += remainder * (pow (10, nread));
-    remainder = dividend % 97;
-  }
-  if (1 == remainder)
-  {
-    GNUNET_free (nbuf);
-    return GNUNET_YES;
-  }
- EXITIF_exit:
-  GNUNET_free (nbuf);
-  return GNUNET_NO;
-}
-
-
-/**
- * Validate SEPA account details.
- *
- * @param wire JSON with the SEPA details
- * @return  #GNUNET_YES if correctly formatted; #GNUNET_NO if not
- */
-static int
-validate_sepa (const json_t *wire)
-{
-  json_error_t error;
-  const char *type;
-  const char *iban;
-  const char *name;
-  const char *bic;
-  uint64_t r;
-  const char *address;
-
-  UNPACK_EXITIF (0 != json_unpack_ex
-                 ((json_t *) wire,
-                  &error, JSON_STRICT,
-                  "{"
-                  "s:s," /* TYPE: sepa */
-                  "s:s," /* IBAN: iban */
-                  "s:s," /* name: beneficiary name */
-                  "s:s," /* BIC: beneficiary bank's BIC */
-                  "s:i," /* r: random 64-bit integer nounce */
-                  "s:s"  /* address: address of the beneficiary */
-                  "}",
-                  "type", &type,
-                  "IBAN", &iban,
-                  "name", &name,
-                  "bic", &bic,
-                  "r", &r,
-                  "address", &address));
-  if (1 != validate_iban (iban))
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-		"IBAN `%s' invalid\n",
-		iban);
-    return GNUNET_NO;
-  }
-  return GNUNET_YES;
- EXITIF_exit:
-  return GNUNET_NO;
-}
-
-
-/**
- * Validate TEST account details.  The "test" format is used
- * for testing, so this validator does nothing.
- *
- * @param wire JSON with the TEST details
- * @return  #GNUNET_YES if correctly formatted; #GNUNET_NO if not
- */
-static int
-validate_test (const json_t *wire)
-{
-  return GNUNET_YES;
-}
-
-
-/**
- * Handler for a wire format.
- */
-struct FormatHandler
-{
-  /**
-   * Type handled by this format handler.
-   */
-  const char *type;
-
-  /**
-   * Function to call to evaluate the format.
-   *
-   * @param wire the JSON to evaluate
-   * @return #GNUNET_YES if correctly formatted; #GNUNET_NO if not
-   */
-  int (*handler)(const json_t *wire);
-};
-
-
-/**
- * Check if the given wire format JSON object is correctly formatted
- *
- * @param allowed NULL-terminated array of allowed wire format types
- * @param wire the JSON wire format object
- * @return #GNUNET_YES if correctly formatted; #GNUNET_NO if not
- */
-int
-TALER_json_validate_wireformat (const char **allowed,
-				const json_t *wire)
-{
-  static const struct FormatHandler format_handlers[] = {
-    { "SEPA", &validate_sepa },
-    { "TEST", &validate_test },
-    { NULL, NULL}
-  };
-  unsigned int i;
-  const char *stype;
-  json_error_t error;
-
-  UNPACK_EXITIF (0 != json_unpack_ex
-                 ((json_t *) wire,
-                  &error, 0,
-                  "{s:s}",
-                  "type", &stype));
-  for (i=0;NULL != allowed[i];i++)
-    if (0 == strcasecmp (allowed[i],
-                         stype))
-      break;
-  if (NULL == allowed[i])
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-                "Wireformat `%s' does not match mint's allowed formats\n",
-                stype);
-    return GNUNET_NO;
-  }
-
-  for (i=0;NULL != format_handlers[i].type;i++)
-    if (0 == strcasecmp (format_handlers[i].type,
-                         stype))
-      return format_handlers[i].handler (wire);
-  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-              "Wireformat `%s' not supported\n",
-              stype);
-  return GNUNET_NO;
- EXITIF_exit:
-  return GNUNET_NO;
-}
-
-/* end of wireformats.c */