Add a Geldkarte gadget application.

Minor other changes.

1 files changed, 337 insertions, 0 deletions

diff --git a/scd/app-geldkarte.c b/scd/app-geldkarte.c
new file mode 100644
index 000000000..3db42bf95
--- /dev/null
+++ b/scd/app-geldkarte.c
@@ -0,0 +1,337 @@
+/* app-geldkarte.c - The German Geldkarte application
+ * Copyright (C) 2004 g10 Code GmbH
+ * Copyright (C) 2009 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG 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 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG 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 this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+/* This is a read-only application to quickly dump information of a
+   German Geldkarte (debit card for small amounts).
+
+   Because this application does no use an AID it is best to test for
+   it after the test for other applications.
+*/
+
+
+#include <config.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <time.h>
+#include <ctype.h>
+
+#include "scdaemon.h"
+
+#include "i18n.h"
+#include "iso7816.h"
+#include "app-common.h"
+#include "tlv.h"
+
+
+
+/* Object with application (i.e. Geldkarte) specific data.  */
+struct app_local_s
+{
+  char kblz[2+1+4+1];
+  const char *banktype;
+  char *cardno;
+  char expires[7+1];
+  char validfrom[10+1];
+  char *country;
+  char currency[3+1];
+  unsigned int currency_mult100;
+  unsigned char chipid;
+  unsigned char osvers;
+};
+
+
+
+
+/* Deconstructor. */
+static void
+do_deinit (app_t app)
+{
+  if (app && app->app_local)
+    {
+      xfree (app->app_local->cardno);
+      xfree (app->app_local->country);
+      xfree (app->app_local);
+      app->app_local = NULL;
+    }
+}
+
+
+static gpg_error_t
+send_one_string (ctrl_t ctrl, const char *name, const char *string)
+{
+  if (!name || !string)
+    return 0;
+  send_status_info (ctrl, name, string, strlen (string), NULL, 0);
+  return 0;
+}
+
+/* Implement the GETATTR command.  This is similar to the LEARN
+   command but returns just one value via the status interface. */
+static gpg_error_t 
+do_getattr (app_t app, ctrl_t ctrl, const char *name)
+{
+  gpg_error_t err;
+  struct app_local_s *ld = app->app_local;
+  char numbuf[100];
+  
+  if (!strcmp (name, "X-KBLZ"))
+    err = send_one_string (ctrl, name, ld->kblz);
+  else if (!strcmp (name, "X-BANKINFO"))
+    err = send_one_string (ctrl, name, ld->banktype);
+  else if (!strcmp (name, "X-CARDNO"))
+    err = send_one_string (ctrl, name, ld->cardno);
+  else if (!strcmp (name, "X-EXPIRES"))
+    err = send_one_string (ctrl, name, ld->expires);
+  else if (!strcmp (name, "X-VALIDFROM"))
+    err = send_one_string (ctrl, name, ld->validfrom);
+  else if (!strcmp (name, "X-COUNTRY"))
+    err = send_one_string (ctrl, name, ld->country);
+  else if (!strcmp (name, "X-CURRENCY"))
+    err = send_one_string (ctrl, name, ld->currency);
+  else if (!strcmp (name, "X-CRNCMULT"))
+    {
+      snprintf (numbuf, sizeof numbuf, "%u", ld->currency_mult100);
+      err = send_one_string (ctrl, name, numbuf);
+    }
+  else if (!strcmp (name, "X-ZKACHIPID"))
+    {
+      snprintf (numbuf, sizeof numbuf, "0x%02X", ld->chipid);
+      err = send_one_string (ctrl, name, numbuf);
+    }
+  else if (!strcmp (name, "X-OSVERSION"))
+    {
+      snprintf (numbuf, sizeof numbuf, "0x%02X", ld->osvers);
+      err = send_one_string (ctrl, name, numbuf);
+    }
+  else
+    err = gpg_error (GPG_ERR_INV_NAME); 
+
+  return err;
+}
+
+
+static gpg_error_t
+do_learn_status (app_t app, ctrl_t ctrl)
+{
+  static const char *names[] = {
+    "X-KBLZ",
+    "X-BANKINFO",
+    "X-CARDNO",
+    "X-EXPIRES",
+    "X-VALIDFROM",
+    "X-COUNTRY",
+    "X-CURRENCY",
+    "X-CRNCMULT",
+    "X-ZKACHIPID",
+    "X-OSVERSION",
+    NULL
+  };
+  gpg_error_t err = 0;
+  int idx;
+
+  for (idx=0; names[idx] && !err; idx++)
+    err = do_getattr (app, ctrl, names[idx]);
+  return err;
+}
+
+
+static char *
+copy_bcd (const unsigned char *string, size_t length)
+{
+  const unsigned char *s;
+  size_t n;
+  size_t needed;
+  char *buffer, *dst;
+
+  if (!length)
+    return xtrystrdup ("");
+      
+  /* Skip leading zeroes. */
+  for (; length && !*string; length--, string++)
+    ;
+  s = string;
+  n = length;
+  needed = 0;
+  for (; n ; n--, s++)
+    {
+      if (!needed && !(*s & 0xf0))
+        ; /* Skip the leading zero in the first nibble.  */
+      else 
+        {
+          if ( ((*s >> 4) & 0x0f) > 9 )
+            {
+              errno = EINVAL;
+              return NULL;
+            }
+          needed++;
+        }
+      if ( n == 1 && (*s & 0x0f) > 9 )
+        ; /* Ignore the last digit if it has the sign.  */
+      else
+        {
+          needed++;
+          if ( (*s & 0x0f) > 9 )
+            {
+              errno = EINVAL;
+              return NULL;
+            }
+        }
+      
+    }
+  if (!needed) /* If it is all zero, print a "0". */
+    needed++;
+
+  buffer = dst = xtrymalloc (needed+1);
+  if (!buffer)
+    return NULL;
+
+  s = string;
+  n = length;
+  needed = 0;  
+  for (; n ; n--, s++)
+    {
+      if (!needed && !(*s & 0xf0))
+        ; /* Skip the leading zero in the first nibble.  */
+      else 
+        {
+          *dst++ = '0' + ((*s >> 4) & 0x0f);
+          needed++;
+        }
+
+      if ( n == 1 && (*s & 0x0f) > 9 )
+        ; /* Ignore the last digit if it has the sign.  */
+      else
+        {
+          *dst++ = '0' + (*s & 0x0f);
+          needed++;
+        }
+    }
+  if (!needed)
+    *dst++ = '0';  
+  *dst = 0;
+
+  return buffer;
+}
+
+
+
+
+/* Select the Geldkarte application.  */
+gpg_error_t
+app_select_geldkarte (app_t app)
+{
+  gpg_error_t err;
+  int slot = app->slot;
+  unsigned char *result = NULL;
+  size_t resultlen;
+  struct app_local_s *ld;
+  const char *banktype;
+  
+  err = iso7816_select_file (slot, 0x3f00, 1, NULL, NULL);
+  if (err)
+    goto leave;  /* Oops.  */
+
+  /* Read short EF 0xbc.  We require this record to be at least 24
+     bytes with the the first byte 0x67 and a correct the filler
+     byte. */
+  err = iso7816_read_record (slot, 1, 1, 0xbc, &result, &resultlen);
+  if (err)
+    goto leave;  /* No such record or other error - not a Geldkarte.  */
+  if (resultlen < 24 || *result != 0x67 || result[22])
+    {
+      err = gpg_error (GPG_ERR_NOT_FOUND);
+      goto leave;
+    }
+  
+  /* The short Bankleitzahl consists of 3 bytes at offset 1.  */
+  switch (result[1])
+    {
+    case 0x21: banktype = "Oeffentlich-rechtliche oder private Bank"; break;
+    case 0x22: banktype = "Privat- oder Geschaeftsbank"; break;
+    case 0x25: banktype = "Sparkasse"; break;
+    case 0x26:
+    case 0x29: banktype = "Genossenschaftsbank"; break;
+    default: 
+      err = gpg_error (GPG_ERR_NOT_FOUND);
+      goto leave; /* Probably not a Geldkarte. */
+    }
+  
+  app->apptype = "GELDKARTE";
+  app->fnc.deinit = do_deinit;
+
+  app->app_local = ld = xtrycalloc (1, sizeof *app->app_local);
+  if (!app->app_local)
+    {
+      err = gpg_err_code_from_syserror ();
+      goto leave;
+    }
+
+  snprintf (ld->kblz, sizeof ld->kblz, "%02X-%02X%02X", 
+            result[1], result[2], result[3]);
+  ld->banktype = banktype;
+  ld->cardno = copy_bcd (result+4, 5);
+  if (!ld->cardno)
+    {
+      err = gpg_err_code_from_syserror ();
+      goto leave;
+    }
+  
+  snprintf (ld->expires, sizeof ld->expires, "20%02X-%02X", 
+            result[10], result[11]);
+  snprintf (ld->validfrom, sizeof ld->validfrom, "20%02X-%02X-%02X",
+            result[12], result[13], result[14]);
+
+  ld->country = copy_bcd (result+15, 2);
+  if (!ld->country)
+    {
+      err = gpg_err_code_from_syserror ();
+      goto leave;
+    }
+
+  snprintf (ld->currency, sizeof ld->currency, "%c%c%c",
+            isascii (result[17])? result[17]:' ',
+            isascii (result[18])? result[18]:' ',
+            isascii (result[19])? result[19]:' ');
+
+  ld->currency_mult100 = (result[20] == 0x01? 1:
+                          result[20] == 0x02? 10:
+                          result[20] == 0x04? 100:
+                          result[20] == 0x08? 1000:
+                          result[20] == 0x10? 10000:
+                          result[20] == 0x20? 100000:0);
+
+  ld->chipid = result[21];
+  ld->osvers = result[23];
+
+  /* Setup the rest of the methods.  */
+  app->fnc.learn_status = do_learn_status;
+  app->fnc.getattr = do_getattr;
+
+
+ leave:
+  xfree (result);
+  if (err)
+    do_deinit (app);
+  return err;
+}