1 files changed, 299 insertions, 0 deletions
diff --git a/scd/apdu.c b/scd/apdu.c
new file mode 100644
index 000000000..8fa531926
--- /dev/null
+++ b/scd/apdu.c
@@ -0,0 +1,299 @@
+/* apdu.c - ISO 7816 APDU functions and low level I/O
+ *	Copyright (C) 2003 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <config.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dlfcn.h>
+
+#include "scdaemon.h"
+#include "apdu.h"
+
+#define HAVE_CTAPI 1
+
+#define MAX_READER 4 /* Number of readers we support concurrently. */
+#define CARD_CONNECT_TIMEOUT 30 /* Number of seconds to wait for
+                                   insertion of the card. */
+
+
+
+/* A global table to keep track of active readers. */
+static struct {
+  int used;            /* True if slot is used. */
+  unsigned short port; /* port number0 = unused, 1 - dev/tty */
+  int status;
+  unsigned char atr[33];
+  size_t atrlen;
+} reader_table[MAX_READER];                          
+
+
+/* ct API function pointer. */
+static char (*CT_init) (unsigned short ctn, unsigned short Pn);
+static char (*CT_data) (unsigned short ctn, unsigned char *dad,
+                        unsigned char *sad, unsigned short lc,
+                        unsigned char *cmd, unsigned short *lr,
+                        unsigned char *rsp);
+static char (*CT_close) (unsigned short ctn);
+
+
+
+
+
+/* 
+      Helper
+ */
+ 
+
+/* Find an unused reader slot for PORT and put it into the reader
+   table.  Return -1 on error or the index into the reader table. */
+static int 
+new_reader_slot (int port)    
+{
+  int i, reader = -1;
+
+  if (port < 0 || port > 0xffff)
+    {
+      log_error ("new_reader_slot: invalid port %d requested\n", port);
+      return -1;
+    }
+
+  for (i=0; i < MAX_READER; i++)
+    {
+      if (reader_table[i].used && reader_table[i].port == port)
+        {
+          log_error ("new_reader_slot: requested port %d already in use\n",
+                     reader);
+          return -1; 
+        }
+      else if (!reader_table[i].used && reader == -1)
+        reader = i;
+    }
+  if (reader == -1)
+    {
+      log_error ("new_reader_slot: out of slots\n");
+      return -1;
+    }
+  reader_table[reader].used = 1;
+  reader_table[reader].port = port;
+  return reader;
+}
+
+
+static void
+dump_reader_status (int reader)
+{
+  log_info ("reader %d: %s\n", reader,
+            reader_table[reader].status == 1? "Processor ICC present" :
+            reader_table[reader].status == 0? "Memory ICC present" :
+                                              "ICC not present" );
+ 
+  if (reader_table[reader].status != -1)
+    {
+      log_info ("reader %d: ATR=", reader);
+      log_printhex ("", reader_table[reader].atr,
+                    reader_table[reader].atrlen);
+    }
+}
+
+
+
+#ifdef HAVE_CTAPI
+/* 
+       ct API Interface 
+ */
+
+static const char *
+ct_error_string (int err)
+{
+  switch (err)
+    {
+    case 0: return "okay";
+    case -1: return "invalid data";
+    case -8: return "ct error";
+    case -10: return "transmission error";
+    case -11: return "memory allocation error";
+    case -128: return "HTSI error";
+    default: return "unknown CT-API error";
+    }
+}
+
+/* Wait for the card in READER and activate it.  Return -1 on error or
+   0 on success. */
+static int
+ct_activate_card (int reader)
+{
+  int rc, count;
+
+  for (count = 0; count < CARD_CONNECT_TIMEOUT; count++)
+    {
+      unsigned char dad[1], sad[1], cmd[11], buf[256];
+      unsigned short buflen;
+
+      /* Check whether card has been inserted. */
+      dad[0] = 1;     /* Destination address: CT. */    
+      sad[0] = 2;     /* Source address: Host. */
+
+      cmd[0] = 0x20;  /* Class byte. */
+      cmd[1] = 0x13;  /* Request status. */
+      cmd[2] = 0x00;  /* From kernel. */
+      cmd[3] = 0x80;  /* Return card's DO. */
+      cmd[4] = 0x00;
+
+      buflen = DIM(buf);
+
+      rc = CT_data (reader, dad, sad, 5, cmd, &buflen, buf);
+      if (rc || buflen < 2 || buf[buflen-2] != 0x90)
+        {
+          log_error ("ct_activate_card: can't get status of reader %d: %s\n",
+                     reader, ct_error_string (rc));
+          return -1;
+        }
+
+      if (buf[0] == 0x05)
+        { /* Connected, now activate the card. */           
+          dad[0] = 1;    /* Destination address: CT. */    
+          sad[0] = 2;    /* Source address: Host. */
+
+          cmd[0] = 0x20;  /* Class byte. */
+          cmd[1] = 0x12;  /* Request ICC. */
+          cmd[2] = 0x01;  /* From first interface. */
+          cmd[3] = 0x01;  /* Return card's ATR. */
+          cmd[4] = 0x00;
+
+          buflen = DIM(buf);
+
+          rc = CT_data (reader, dad, sad, 5, cmd, &buflen, buf);
+          if (rc || buflen < 2 || buf[buflen-2] != 0x90)
+            {
+              log_error ("ct_activate_card(%d): activation failed: %s\n",
+                         reader, ct_error_string (rc));
+              return -1;
+            }
+
+          /* Store the type and the ATR. */
+          if (buflen - 2 > DIM (reader_table[0].atr))
+            {
+              log_error ("ct_activate_card(%d): ATR too long\n", reader);
+              return -1;
+            }
+
+          reader_table[reader].status = buf[buflen - 1];
+          memcpy (reader_table[reader].atr, buf, buflen - 2);
+          reader_table[reader].atrlen = buflen - 2;
+          return 0;
+        }
+
+      sleep (1); /* FIXME: we should use a more reliable timer. */
+    }
+ 
+  log_info ("ct_activate_card(%d): timeout waiting for card\n", reader);
+  return -1;
+}
+
+
+/* Open a reader and return an internal handle for it.  PORT is a
+   non-negative value with the port number of the reader. USB readers
+   do habe port numbers starting at 32769. */
+static int
+open_ct_reader (int port)
+{
+  int rc, reader;
+
+  reader = new_reader_slot (port);
+  if (reader == -1)
+    return reader;
+
+  rc = CT_init (reader, (unsigned short)port);
+  if (rc)
+    {
+      log_error ("apdu_open_ct_reader failed on port %d: %s\n",
+                 port, ct_error_string (rc));
+      reader_table[reader].used = 0;
+      return -1;
+    }
+
+  rc = ct_activate_card (reader);
+  if (rc)
+    {
+      reader_table[reader].used = 0;
+      return -1;
+    }
+
+  dump_reader_status (reader);
+  return reader;
+}
+
+
+#endif /*HAVE_CTAPI*/
+
+
+#ifdef HAVE_PCSC
+/* 
+       PC/SC Interface
+ */
+
+
+#endif /*HAVE_PCSC*/
+
+
+/* 
+       Driver Access
+ */
+
+/* Open the reader and return an internal slot number or -1 on
+   error. */
+int
+apdu_open_reader (int port)
+{
+  static int ct_api_loaded;
+
+  if (!ct_api_loaded)
+    {
+      void *handle;
+
+      handle = dlopen ("libtowitoko.so", RTLD_LAZY);
+      if (!handle)
+        {
+          log_error ("apdu_open_reader: failed to open driver: %s",
+                     dlerror ());
+          return -1;
+        }
+      CT_init = dlsym (handle, "CT_init");
+      CT_data = dlsym (handle, "CT_data");
+      CT_close = dlsym (handle, "CT_close");
+      if (!CT_init || !CT_data || !CT_close)
+        {
+          log_error ("apdu_open_reader: invalid driver\n");
+          dlclose (handle);
+          return -1;
+        }
+      ct_api_loaded = 1;
+    }
+  return open_ct_reader (port);
+}
+
+
+
+
+
+
+