-cleanup age-withdraw_reveal

debian/changelog

@@ -1,3 +1,15 @@
+taler-exchange (0.9.2-2) unstable; urgency=low
+
+  * Further improvements to Debian package.
+
+ -- Christian Grothoff <grothoff@gnu.org>  Sat, 3 Mar 2023 23:50:12 +0200
+
+taler-exchange (0.9.2-1) unstable; urgency=low
+
+  * Minor improvements to Debian package, also adds age-withdraw REST APIs.
+
+ -- Christian Grothoff <grothoff@gnu.org>  Sat, 3 Mar 2023 13:50:12 +0200
+
 taler-exchange (0.9.2) unstable; urgency=low
 
   * Packaging latest release.

debian/etc-taler-auditor/nginx/sites-available/taler-auditor

@@ -1,7 +1,18 @@
-location /taler-auditor/ {
-         proxy_pass http://unix:/var/lib/taler-auditor/auditor.sock;
-         proxy_redirect off;
-         proxy_set_header Host $host;
-         proxy_set_header X-Forwarded-Host "example.com";
-         proxy_set_header X-Forwarded-Proto "https";
+server {
+
+  listen 80;
+  listen [::]:80;
+
+  server_name localhost;
+
+  access_log /var/log/nginx/auditor.log;
+  error_log /var/log/nginx/auditor.err;
+
+  location /taler-auditor/ {
+    proxy_pass http://unix:/var/lib/taler-auditor/auditor.sock;
+    proxy_redirect off;
+    proxy_set_header Host $host;
+    proxy_set_header X-Forwarded-Host "localhost";
+    #proxy_set_header X-Forwarded-Proto "https";
+  }
 }

debian/etc-taler-exchange/nginx/sites-available/taler-exchange

@@ -4,6 +4,9 @@ server {
 
   server_name localhost;
 
+  access_log /var/log/nginx/exchange.log;
+  error_log /var/log/nginx/exchange.err;
+
   location /taler-exchange/ {
      proxy_pass http://unix:/run/taler/exchange-httpd/exchange-http.sock:/;
      proxy_redirect off;

debian/etc-taler-exchange/taler/conf.d/exchange-business.conf

@@ -6,11 +6,11 @@
 # which you can get using `taler-exchange-offline setup`.
 # This is just an example, your key will be different!
 # MASTER_PUBLIC_KEY = YE6Q6TR1EDB7FD0S68TGDZGF1P0GHJD2S0XVV8R2S62MYJ6HJ4ZG
-MASTER_PUBLIC_KEY =
+# MASTER_PUBLIC_KEY =
 
 # Publicly visible base URL of the exchange.
 # BASE_URL = https://example.com/
-BASE_URL =
+# BASE_URL =
 
 # For your terms of service and privacy policy, you should specify
 # an Etag that must be updated whenever there are significant
@@ -20,6 +20,8 @@ BASE_URL =
 # TERMS_ETAG =
 # PRIVACY_ETAG =
 
+SERVE = unix
+UNIXPATH_MODE = 666
 
 # Bank accounts used by the exchange should be specified here:
 [exchange-account-1]

debian/etc-taler-exchange/taler/secrets/exchange-db.secret.conf

@@ -4,7 +4,7 @@
 
 # Typically, there should only be a single line here, of the form:
 
-CONFIG=postgres:///DATABASE
+# CONFIG=postgres:///DATABASE
 
 # The details of the URI depend on where the database lives and how
 # access control was configured.

debian/taler-exchange-offline.postinst

@@ -4,20 +4,20 @@ set -e
 
 . /usr/share/debconf/confmodule
 
-TALER_HOME="/var/lib/taler"
-
 case "${1}" in
 configure)
 
   if ! getent group taler-exchange-offline >/dev/null; then
-    addgroup --quiet --system taler-exchange-offline
+    addgroup --quiet taler-exchange-offline
   fi
 
   if ! getent passwd taler-exchange-offline >/dev/null; then
-    adduser --quiet --system \
+    adduser --quiet \
+      --disabled-password \
+      --system \
+      --shell /bin/bash \
       --ingroup taler-exchange-offline \
-      --no-create-home \
-      --home ${TALER_HOME} taler-exchange-offline
+      taler-exchange-offline
   fi
 
   ;;

debian/taler-exchange.postinst

@@ -30,6 +30,7 @@ configure)
   if ! getent passwd ${_EUSERNAME} >/dev/null; then
     adduser --quiet --system --no-create-home --ingroup ${_GROUPNAME} --home ${TALER_HOME} ${_EUSERNAME}
     adduser --quiet ${_EUSERNAME} ${_DBGROUPNAME}
+    adduser --quiet ${_EUSERNAME} ${_GROUPNAME}
   fi
   if ! getent passwd ${_RSECUSERNAME} >/dev/null; then
     adduser --quiet --system --no-create-home --ingroup ${_GROUPNAME} --home ${TALER_HOME} ${_RSECUSERNAME}
@@ -53,10 +54,10 @@ configure)
     adduser --quiet ${_AGGRUSERNAME} ${_DBGROUPNAME}
   fi
 
-  if ! dpkg-statoverride --list /etc/taler/secrets/exchange-accountcredentials.secret.conf >/dev/null 2>&1; then
+  if ! dpkg-statoverride --list /etc/taler/secrets/exchange-accountcredentials-1.secret.conf >/dev/null 2>&1; then
     dpkg-statoverride --add --update \
       ${_WIREUSERNAME} root 460 \
-      /etc/taler/secrets/exchange-accountcredentials.secret.conf
+      /etc/taler/secrets/exchange-accountcredentials-1.secret.conf
   fi
 
   if ! dpkg-statoverride --list /etc/taler/secrets/exchange-db.secret.conf >/dev/null 2>&1; then

debian/taler-exchange.tmpfiles

@@ -1,7 +1,8 @@
 #Type Path        Mode UID  GID  Age Argument
 d /run/taler/exchange-secmod-rsa 0755 taler-exchange-secmod-rsa taler-exchange-secmod  - -
+d /run/taler/exchange-secmod-cs 0755 taler-exchange-secmod-cs taler-exchange-secmod  - -
 d /run/taler/exchange-secmod-eddsa 0755 taler-exchange-secmod-eddsa taler-exchange-secmod  - -
 d /run/taler/exchange-httpd 0750 taler-exchange-httpd www-data  - -
-d /var/lib/taler/exchange-offline 0700 taler-exchange-offline taler-exchange-offline  - -
+d /var/lib/taler/exchange-secmod-cs 0700 taler-exchange-secmod-cs taler-exchange-secmod  - -
 d /var/lib/taler/exchange-secmod-rsa 0700 taler-exchange-secmod-rsa taler-exchange-secmod  - -
 d /var/lib/taler/exchange-secmod-eddsa 0700 taler-exchange-secmod-eddsa taler-exchange-secmod  - -

src/exchange/taler-exchange-httpd.c

@@ -1939,6 +1939,9 @@ exchange_serve_process_config (void)
       GNUNET_free (master_public_key_str);
       return GNUNET_SYSERR;
     }
+    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+                "Launching exchange with public key `%s'...\n",
+                master_public_key_str);
     GNUNET_free (master_public_key_str);
   }
 
@@ -1961,9 +1964,6 @@ exchange_serve_process_config (void)
                         &TEH_attribute_key.hash);
     GNUNET_free (attr_enc_key_str);
   }
-  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-              "Launching exchange with public key `%s'...\n",
-              GNUNET_p2s (&TEH_master_public_key.eddsa_pub));
 
   if (NULL ==
       (TEH_plugin = TALER_EXCHANGEDB_plugin_load (TEH_cfg)))

src/exchange/taler-exchange-httpd_age-withdraw_reveal.c

@@ -116,17 +116,17 @@ handle_age_withdraw_reveal_json (
       error = "denoms_h must not be empty";
     else if (actx->num_coins != json_array_size (j_coin_evs))
       error = "denoms_h and coins_evs must be arrays of the same size";
+    else if (actx->num_coins > TALER_MAX_FRESH_COINS)
+      /**
+       * The wallet had committed to more than the maximum coins allowed, the
+       * reserve has been charged, but now the user can not withdraw any money
+       * from it.  Note that the user can't get their money back in this case!
+       **/
+      error = "maximum number of coins that can be withdrawn has been exceeded";
     else if (actx->num_coins * (TALER_CNC_KAPPA - 1)
              != json_array_size (j_disclosed_coins))
       error = "the size of array disclosed_coins must be "
-              TALER_CNC_KAPPA_MINUS_ONE_STR " times of the size of denoms_h";
-    else if (actx->num_coins > TALER_MAX_FRESH_COINS)
-      /**
-       * FIXME?: If the user had commited to more than the maximum coins allowed,
-       * the reserve has been charged, but now the user can not withdraw any money
-       * from it. How can the user get their money back?
-       **/
-      error = "maximum number of coins that can be withdrawn has been exceeded";
+              TALER_CNC_KAPPA_MINUS_ONE_STR " times the size of denoms_h";
 
     if (NULL != error)
       return TALER_MHD_reply_with_error (connection,
@@ -135,22 +135,23 @@ handle_age_withdraw_reveal_json (
                                          error);
   }
 
-  /* Parse denomination keys */
+  /* Continue parsing the parts */
   {
-    unsigned int idx;
-    json_t *jh;
+    unsigned int idx = 0;
+    json_t *value = NULL;
 
+    /* Parse denomination keys */
     actx->denoms_h = GNUNET_new_array (actx->num_coins,
                                        struct TALER_DenominationHashP);
 
-    json_array_foreach (j_denoms_h, idx, jh) {
+    json_array_foreach (j_denoms_h, idx, value) {
       struct GNUNET_JSON_Specification spec[] = {
         GNUNET_JSON_spec_fixed_auto (NULL, &actx->denoms_h[idx]),
         GNUNET_JSON_spec_end ()
       };
 
       if (GNUNET_OK !=
-          GNUNET_JSON_parse (jh, spec, NULL, NULL))
+          GNUNET_JSON_parse (value, spec, NULL, NULL))
       {
         char msg[256] = {0};
         GNUNET_snprintf (msg,
@@ -161,28 +162,22 @@ handle_age_withdraw_reveal_json (
                                               MHD_HTTP_BAD_REQUEST,
                                               TALER_EC_GENERIC_PARAMETER_MALFORMED,
                                               msg);
-        goto EXIT;
+        goto CLEANUP;
       }
-
     };
-  }
-
-  /* Parse blinded envelopes */
-  {
-    unsigned int idx;
-    json_t *ce;
 
+    /* Parse blinded envelopes */
     actx->coin_evs = GNUNET_new_array (actx->num_coins,
                                        struct TALER_BlindedCoinHashP);
 
-    json_array_foreach (j_coin_evs, idx, ce) {
+    json_array_foreach (j_coin_evs, idx, value) {
       struct GNUNET_JSON_Specification spec[] = {
         GNUNET_JSON_spec_fixed_auto (NULL, &actx->coin_evs[idx]),
         GNUNET_JSON_spec_end ()
       };
 
       if (GNUNET_OK !=
-          GNUNET_JSON_parse (ce, spec, NULL, NULL))
+          GNUNET_JSON_parse (value, spec, NULL, NULL))
       {
         char msg[256] = {0};
         GNUNET_snprintf (msg,
@@ -193,28 +188,23 @@ handle_age_withdraw_reveal_json (
                                               MHD_HTTP_BAD_REQUEST,
                                               TALER_EC_GENERIC_PARAMETER_MALFORMED,
                                               msg);
-        goto EXIT;
+        goto CLEANUP;
       }
     };
-  }
-
-  /* Parse diclosed keys */
-  {
-    unsigned int idx;
-    json_t *dc;
 
+    /* Parse diclosed keys */
     actx->disclosed_coins = GNUNET_new_array (
-      actx->num_coins * (TALER_CNC_KAPPA),
+      actx->num_coins * (TALER_CNC_KAPPA - 1),
       struct GNUNET_CRYPTO_EddsaPrivateKey);
 
-    json_array_foreach (j_coin_evs, idx, dc) {
+    json_array_foreach (j_disclosed_coins, idx, value) {
       struct GNUNET_JSON_Specification spec[] = {
         GNUNET_JSON_spec_fixed_auto (NULL, &actx->disclosed_coins[idx]),
         GNUNET_JSON_spec_end ()
       };
 
       if (GNUNET_OK !=
-          GNUNET_JSON_parse (dc, spec, NULL, NULL))
+          GNUNET_JSON_parse (value, spec, NULL, NULL))
       {
         char msg[256] = {0};
         GNUNET_snprintf (msg,
@@ -225,10 +215,9 @@ handle_age_withdraw_reveal_json (
                                               MHD_HTTP_BAD_REQUEST,
                                               TALER_EC_GENERIC_PARAMETER_MALFORMED,
                                               msg);
-        goto EXIT;
+        goto CLEANUP;
       }
     };
-
   }
 
   /* TODO:oec: find commitment */
@@ -241,8 +230,7 @@ handle_age_withdraw_reveal_json (
   /* TODO:oec: send response */
 
 
-  /* TODO */
-EXIT:
+CLEANUP:
   age_reveal_context_free (actx);
   return mhd_ret;
 }

src/util/crypto_confirmation.c

@@ -21,7 +21,7 @@
  */
 #include "platform.h"
 #include "taler_util.h"
-#include <taler/taler_mhd_lib.h>
+#include "taler_mhd_lib.h"
 #include <gnunet/gnunet_db_lib.h>
 #include <gcrypt.h>
 
@@ -29,7 +29,7 @@
  * How long is a TOTP code valid?
  */
 #define TOTP_VALIDITY_PERIOD GNUNET_TIME_relative_multiply ( \
-   GNUNET_TIME_UNIT_SECONDS, 30)
+    GNUNET_TIME_UNIT_SECONDS, 30)
 
 /**
  * Range of time we allow (plus-minus).
@@ -37,7 +37,6 @@
 #define TIME_INTERVAL_RANGE 2
 
 
-
 /**
  * Compute TOTP code at current time with offset
  * @a time_off for the @a key.
@@ -131,26 +130,22 @@ base32decode (const char *val,
    * 32 characters for decoding, using RFC 3548.
    */
   static const char *decTable__ = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
-  unsigned int wpos;
-  unsigned int rpos;
-  unsigned int bits;
-  unsigned int vbit;
-  unsigned char *udata;
+  unsigned char *udata = key;
+  unsigned int wpos = 0;
+  unsigned int rpos = 0;
+  unsigned int bits = 0;
+  unsigned int vbit = 0;
 
-  udata = val;
-  vbit = 0;
-  wpos = 0;
-  rpos = 0;
-  bits = 0;
   while ((rpos < val_size) || (vbit >= 8))
   {
     if ((rpos < val_size) && (vbit < 8))
     {
       char c = val[rpos++];
-      if (c == '=') { // padding character
+      if (c == '=')   // padding character
+      {
         break;
       }
-      const char *p = strchr(decTable__, toupper(c));
+      const char *p = strchr (decTable__, toupper (c));
       if (! p)
       { // invalid character
         return -1;
@@ -178,29 +173,29 @@ executive_totp (void *h_key,
   ret = NULL;
 
   for (int i = -TIME_INTERVAL_RANGE; i<= TIME_INTERVAL_RANGE; i++)
+  {
+    code = compute_totp (ts,
+                         i,
+                         h_key,
+                         h_key_len);
+    if (NULL == ret)
     {
-      code = compute_totp (ts,
-                           i,
-                           h_key,
-                           h_key_len);
-      if (NULL == ret)
-      {
-        GNUNET_asprintf (&ret,
-                         "%llu",
-                         (unsigned long long) code);
-      }
-      else
-      {
-        char *tmp;
-
-        GNUNET_asprintf (&tmp,
-                         "%s\n%llu",
-                         ret,
-                         (unsigned long long) code);
-        GNUNET_free (ret);
-        ret = tmp;
-      }
+      GNUNET_asprintf (&ret,
+                       "%llu",
+                       (unsigned long long) code);
     }
+    else
+    {
+      char *tmp;
+
+      GNUNET_asprintf (&tmp,
+                       "%s\n%llu",
+                       ret,
+                       (unsigned long long) code);
+      GNUNET_free (ret);
+      ret = tmp;
+    }
+  }
   return ret;
 
 }
@@ -263,13 +258,13 @@ TALER_build_pos_confirmation (const char *pos_key,
     return ret;
   case TALER_MCA_WITH_PRICE:
     {
-      struct GNUNET_HashCode *hkey;
+      struct GNUNET_HashCode hkey;
       struct TALER_AmountNBO ntotal;
 
       TALER_amount_hton (&ntotal,
                          total);
       GNUNET_assert (GNUNET_YES ==
-                     GNUNET_CRYPTO_kdf (hkey,
+                     GNUNET_CRYPTO_kdf (&hkey,
                                         sizeof (hkey),
                                         &ntotal,
                                         sizeof (ntotal),
@@ -278,7 +273,7 @@ TALER_build_pos_confirmation (const char *pos_key,
                                         NULL,
                                         0));
       GNUNET_free (key);
-      ret = executive_totp (hkey,
+      ret = executive_totp (&hkey,
                             sizeof(hkey),
                             ts);
       GNUNET_free (key);