[age restriction] progress 14/n - withdraw and deposit

Age restriction support for
  - withdraw is done and tested
  - deposit is done and tested

TODOs:
  - melt/refresh/reveal
  - link

------

Added functions
 - TALER_age_restriction_commit
 - TALER_age_commitment_derive
 - TALER_age_commitment_hash
 - TALER_age_restriction_commitment_free_inside
 - Hash of age commitment passed around API boundaries

Exchangedb adjustments for denominations
 - all prepared statements re: denominations now handle age_mask
 - signature parameters adjusted

Hash and signature verification of /keys adjusted
 - Hashes of (normal) denominations and age-restricted denominations are
   calculated seperately
 - The hash of the age-restricted ones will then be added to the other
   hash
 - The total hash is signed/verified

Tests for withdraw with age restriction added
 - TALER_EXCHANGE_DenomPublickey now carries age_mask
 - TALER_TESTING_cmd_withdraw_amount* takes age parameter
 - TALER_TESTING_find_pk takes boolean age_restricted
 - WithdrawState carries age_commitment and its hash
 - withdraw_run derives new age commitment, if applicable
 - Added age parameter to testing (13 as example)

Various Fixes and changes
 - Fixes of post handler for /management/extensions
 - Fixes for offline tool extensions signing
 - Slight refactoring of extensions
 - Age restriction extension simplified
   - config is now global to extension
   - added global TEH_age_restriction_enabled and TEH_age_mask in
     taler-exchange-httpd
   - helper functions and macros introduced

1 files changed, 0 insertions, 31 deletions

diff --git a/src/json/json_helper.c b/src/json/json_helper.c
index 96e41b5e3..4ec9a6982 100644
--- a/src/json/json_helper.c
+++ b/src/json/json_helper.c
@@ -950,35 +950,4 @@ TALER_JSON_spec_i18n_str (const char *name,
 }
 
 
-enum GNUNET_GenericReturnValue
-TALER_JSON_parse_agemask (const json_t *root,
-                          struct TALER_AgeMask *mask)
-{
-  const char *name;
-  struct GNUNET_JSON_Specification spec[] = {
-    GNUNET_JSON_spec_string ("extension",
-                             &name),
-    GNUNET_JSON_spec_uint32 ("mask",
-                             &mask->mask),
-    GNUNET_JSON_spec_end ()
-  };
-
-  if (GNUNET_OK != GNUNET_JSON_parse (root,
-                                      spec,
-                                      NULL,
-                                      NULL))
-  {
-    return GNUNET_SYSERR;
-  }
-
-  if (! strncmp (name,
-                 "age_restriction",
-                 sizeof("age_restriction")))
-  {
-    return GNUNET_SYSERR;
-  }
-  return GNUNET_OK;
-}
-
-
 /* end of json/json_helper.c */