* command.c (scd_update_reader_status_file): Write status files.

* app-help.c (app_help_read_length_of_cert): Fixed calculation of
R_CERTOFF.

* pcsc-wrapper.c: New.
* Makefile.am (pkglib_PROGRAMS): Install it here.
* apdu.c (writen, readn): New.
(open_pcsc_reader, pcsc_send_apdu, close_pcsc_reader): Use the
pcsc-wrapper if we are using Pth.
(apdu_send_le): Reinitialize RESULTLEN.  Handle SW_EOF_REACHED
like SW_SUCCESS.

NEWS

@@ -1,6 +1,11 @@
 Noteworthy changes in version 1.9.8
 ------------------------------------------------
 
+ * [scdaemon] Overhauled the internal CCID driver.
+
+ * [scdaemon] Status files named ~/.gnupg/reader_<n>.status are now
+   written when using the internal CCID driver.
+
 
 Noteworthy changes in version 1.9.7 (2004-04-06)
 ------------------------------------------------

scd/ChangeLog

@@ -1,10 +1,17 @@
 2004-04-20  Werner Koch  <wk@gnupg.org>
 
+	* command.c (scd_update_reader_status_file): Write status files.
+
+	* app-help.c (app_help_read_length_of_cert): Fixed calculation of
+	R_CERTOFF.
+
 	* pcsc-wrapper.c: New.
 	* Makefile.am (pkglib_PROGRAMS): Install it here.
 	* apdu.c (writen, readn): New.
 	(open_pcsc_reader, pcsc_send_apdu, close_pcsc_reader): Use the
 	pcsc-wrapper if we are using Pth.
+	(apdu_send_le): Reinitialize RESULTLEN.  Handle SW_EOF_REACHED
+	like SW_SUCCESS.
 
 2004-04-19  Werner Koch  <wk@gnupg.org>
 

scd/apdu.c

@@ -913,7 +913,7 @@ pcsc_send_apdu (int slot, unsigned char *apdu, size_t apdulen,
     }
 
    full_len = len;
-
+   
    n = *buflen < len ? *buflen : len;
    if ((i=readn (slotp->pcsc.rsp_fd, buffer, n, &len)) || len != n)
      {
@@ -922,6 +922,7 @@ pcsc_send_apdu (int slot, unsigned char *apdu, size_t apdulen,
        goto command_failed;
      }
    *buflen = n;
+
    full_len -= len;
    if (full_len)
      {
@@ -1771,8 +1772,10 @@ apdu_send_le(int slot, int class, int ins, int p0, int p1,
              int lc, const char *data, int le,
              unsigned char **retbuf, size_t *retbuflen)
 {
-  unsigned char result[256+10]; /* 10 extra in case of bugs in the driver. */
+#define RESULTLEN 256
-  size_t resultlen = 256;
+  unsigned char result[RESULTLEN+10]; /* 10 extra in case of bugs in
+                                         the driver. */
+  size_t resultlen;
   unsigned char apdu[5+256+1];
   size_t apdulen;
   int sw;
@@ -1811,6 +1814,7 @@ apdu_send_le(int slot, int class, int ins, int p0, int p1,
   assert (sizeof (apdu) >= apdulen);
   /* As safeguard don't pass any garbage from the stack to the driver. */
   memset (apdu+apdulen, 0, sizeof (apdu) - apdulen);
+  resultlen = RESULTLEN;
   rc = send_apdu (slot, apdu, apdulen, result, &resultlen);
   if (rc || resultlen < 2)
     {
@@ -1867,8 +1871,9 @@ apdu_send_le(int slot, int class, int ins, int p0, int p1,
         {
           int len = (sw & 0x00ff);
           
-          log_debug ("apdu_send_simple(%d): %d more bytes available\n",
+          if (DBG_CARD_IO)
-                     slot, len);
+            log_debug ("apdu_send_simple(%d): %d more bytes available\n",
+                       slot, len);
           apdulen = 0;
           apdu[apdulen++] = class;
           apdu[apdulen++] = 0xC0;
@@ -1876,6 +1881,7 @@ apdu_send_le(int slot, int class, int ins, int p0, int p1,
           apdu[apdulen++] = 0;
           apdu[apdulen++] = len; 
           memset (apdu+apdulen, 0, sizeof (apdu) - apdulen);
+          resultlen = RESULTLEN;
           rc = send_apdu (slot, apdu, apdulen, result, &resultlen);
           if (rc || resultlen < 2)
             {
@@ -1893,9 +1899,11 @@ apdu_send_le(int slot, int class, int ins, int p0, int p1,
                 log_printhex ("     dump: ", result, resultlen);
             }
 
-          if ((sw & 0xff00) == SW_MORE_DATA || sw == SW_SUCCESS)
+          if ((sw & 0xff00) == SW_MORE_DATA
+              || sw == SW_SUCCESS
+              || sw == SW_EOF_REACHED )
             {
-              if (retbuf)
+              if (retbuf && resultlen)
                 {
                   if (p - *retbuf + resultlen > bufsize)
                     {
@@ -1935,6 +1943,7 @@ apdu_send_le(int slot, int class, int ins, int p0, int p1,
     log_printhex ("      dump: ", *retbuf, *retbuflen);
  
   return sw;
+#undef RESULTLEN
 }
 
 /* Send an APDU to the card in SLOT.  The APDU is created from all

scd/app-help.c

@@ -147,8 +147,13 @@ app_help_read_length_of_cert (int slot, int fid, size_t *r_certoff)
              is the certificate. */
           *r_certoff += hdrlen + objlen;
           if (*r_certoff > resultlen)
-            return 0; /* That should never happen. */
+            {
+              *r_certoff = 0;
+              return 0; /* That should never happen. */
+            }
         }
+      else
+        *r_certoff = 0;
     }
 
   return resultlen;

scd/ccid-driver.c

@@ -108,7 +108,7 @@
 
 /* Disable all debugging output for now. */
 #undef DBG_CARD_IO
-#define DBG_CARD_IO 1
+#define DBG_CARD_IO 0
 
 /* Define to print information pertaining the T=1 protocol. */
 #undef DEBUG_T1 

scd/command.c

@@ -1179,6 +1179,11 @@ send_status_info (CTRL ctrl, const char *keyword, ...)
 void
 scd_update_reader_status_file (void)
 {
+  static struct {
+    int any;
+    unsigned int status;
+    unsigned int changed;
+  } last[10];
   int slot;
   int used;
   unsigned int status, changed;
@@ -1187,9 +1192,35 @@ scd_update_reader_status_file (void)
      make sense to wait here for a operation to complete.  If we are
      so busy working with the card, delays in the status file updated
      are should be acceptable. */
-  for (slot=0; !apdu_enum_reader (slot, &used); slot++)
+  for (slot=0; (slot < DIM(last)
+                &&!apdu_enum_reader (slot, &used)); slot++)
     if (used && !apdu_get_status (slot, 0, &status, &changed))
       {
-        log_info ("status of slot %d is %u\n", slot, status);
+        if (!last[slot].any || last[slot].status != status
+            || last[slot].changed != changed )
+          {
+            char *fname;
+            char templ[50];
+            FILE *fp;
+
+            last[slot].any = 1;
+            last[slot].status = status;
+            last[slot].changed = changed;
+
+            log_info ("updating status of slot %d to 0x%04X\n", slot, status);
+            
+            sprintf (templ, "reader_%d.status", slot);
+            fname = make_filename (opt.homedir, templ, NULL );
+            fp = fopen (fname, "w");
+            if (fp)
+              {
+                fprintf (fp, "%s\n",
+                         (status & 1)? "USABLE":
+                         (status & 4)? "ACTIVE":
+                         (status & 2)? "PRESENT": "NOCARD");
+                fclose (fp);
+              }
+            xfree (fname);
+          }
       }
 }