added vpcd-config

virtualsmartcard/configure.ac

@@ -124,6 +124,22 @@ else
 fi
 
 
+HAVE_QRENCODE=yes
+PKG_CHECK_EXISTS([libqrencode],
+				 [PKG_CHECK_MODULES([QRENCODE], [libqrencode])],
+				 [AC_MSG_WARN([libqrencode not found by pkg-config])])
+CPPFLAGS="$CPPFLAGS $QRENCODE_CFLAGS -I${srcdir}/src/opensc/src"
+LIBS="$LDFLAGS $QRENCODE_LIBS"
+AC_CHECK_HEADERS(qrencode.h, [], [ HAVE_QRENCODE=no ])
+AC_MSG_CHECKING([for QRcode_encodeString])
+AC_TRY_LINK_FUNC(QRcode_encodeString, [ AC_MSG_RESULT([yes]) ], [ HAVE_QRENCODE=no ])
+AM_CONDITIONAL(HAVE_QRENCODE, test "${HAVE_QRENCODE}" = "yes")
+AM_COND_IF(HAVE_QRENCODE, [AC_DEFINE(HAVE_QRENCODE, 1, [enable QR support])])
+CPPFLAGS="$saved_CPPFLAGS"
+LIBS="$saved_LIBS"
+
+
+
 PACKAGE_SUMMARY="Smart card emulator written in Python"
 AC_SUBST(PACKAGE_SUMMARY)
 
@@ -210,6 +226,8 @@ PTHREAD_LIBS:         ${PTHREAD_LIBS}
 PTHREAD_CFLAGS:       ${PTHREAD_CFLAGS}
 PCSC_CFLAGS:          ${PCSC_CFLAGS}
 PCSC_LIBS:            ${PCSC_LIBS}
+QRENCODE_CFLAGS:      ${QRENCODE_CFLAGS}
+QRENCODE_LIBS:        ${QRENCODE_LIBS}
 BUNDLE_HOST:          ${BUNDLE_HOST}
 LIB_PREFIX:           ${LIB_PREFIX}
 DYN_LIB_EXT:          ${DYN_LIB_EXT}
@@ -230,5 +248,6 @@ AC_CONFIG_FILES([Makefile
                  src/ifd-vpcd/Makefile
                  src/vpcd/Makefile
                  src/vpicc/Makefile
+                 src/vpcd-config/Makefile
                  ])
 AC_OUTPUT

virtualsmartcard/doc/README.txt

@@ -224,6 +224,13 @@ options of |vpicc|.
 
 .. program-output:: vicc --help
 
+.. versionadded:: 0.7
+    We implemented :command:`vpcd-config` which tries to guess the local IP
+    address and outputs |vpcd|'s configuration. |vpicc|'s options should be
+    chosen accordingly (:option:`--hostname` and :option:`--port`)
+    :command:`vpcd-config` also prints a QR code for configuration of the
+    :ref:`remote-reader`.
+
 On Windows you can start |vpicc| with :command:`python.exe src/vpicc/vicc.in`
 or :command:`python.exe vicc`. Note emulating the German ID card
 (:option:`--type nPA`) when running |vpicc| on Windows is currently not

virtualsmartcard/doc/README.txt.in

@@ -224,6 +224,13 @@ options of |vpicc|.
 
 .. program-output:: vicc --help
 
+.. versionadded:: 0.7
+    We implemented :command:`vpcd-config` which tries to guess the local IP
+    address and outputs |vpcd|'s configuration. |vpicc|'s options should be
+    chosen accordingly (:option:`--hostname` and :option:`--port`)
+    :command:`vpcd-config` also prints a QR code for configuration of the
+    :ref:`remote-reader`.
+
 On Windows you can start |vpicc| with :command:`python.exe src/vpicc/vicc.in`
 or :command:`python.exe vicc`. Note emulating the German ID card
 (:option:`--type nPA`) when running |vpicc| on Windows is currently not

virtualsmartcard/src/Makefile.am

@@ -1,4 +1,4 @@
-SUBDIRS  = vpcd vpicc ifd-vpcd
+SUBDIRS  = vpcd vpicc ifd-vpcd vpcd-config
 
 if BUILD_LIBPCSCLITE
 SUBDIRS += pcsclite-vpcd

virtualsmartcard/src/ifd-vpcd/ifd-vpcd.c

@@ -28,8 +28,8 @@
 /* pcscd allows at most 16 readers. We will use 10.
  * See PCSCLITE_MAX_READERS_CONTEXTS in pcsclite.h */
 #define VICC_MAX_SLOTS \
-        PCSCLITE_MAX_READERS_CONTEXTS > 6 ? \
+        (PCSCLITE_MAX_READERS_CONTEXTS > 6 ? \
-        PCSCLITE_MAX_READERS_CONTEXTS-6 : 1
+        PCSCLITE_MAX_READERS_CONTEXTS-6 : 1)
 const unsigned char vicc_max_slots = VICC_MAX_SLOTS;
 
 static struct vicc_ctx *ctx[VICC_MAX_SLOTS];

virtualsmartcard/src/ifd-vpcd/ifd-vpcd.h

@@ -23,7 +23,7 @@
 extern "C" {
 #endif
 
-extern const unsigned char VICC_MAX_SLOTS;
+extern const unsigned char vicc_max_slots;
 extern const char *hostname;
 
 #ifdef  __cplusplus

virtualsmartcard/src/vpcd-config/Makefile.am

@@ -0,0 +1,7 @@
+EXTRA_DIST 	        = qransi.c
+
+bin_PROGRAMS        = vpcd-config
+
+vpcd_config_CFLAGS  = $(PCSC_CFLAGS) $(QRENCODE_CFLAGS) -I$(srcdir)/../vpcd
+vpcd_config_SOURCES = vpcd-config.c local-ip.c
+vpcd_config_LDADD   = $(QRENCODE_LIBS)

virtualsmartcard/src/vpcd-config/local-ip.c

@@ -0,0 +1,51 @@
+/* Derived from http://www.binarytides.com/get-local-ip-c-linux/ by Silver Moon */
+
+/*
+ * Find local ip used as source ip in ip packets.
+ * Use getsockname and a udp connection
+ */
+
+#include<stdio.h> //printf
+#include<string.h>    //memset
+#include<errno.h> //errno
+#include<sys/socket.h>    //socket
+#include<netinet/in.h> //sockaddr_in
+#include<arpa/inet.h> //getsockname
+#include<unistd.h>    //close
+
+#define ERROR_STRING "Unable to guess local IP address"
+
+const char *local_ip (void)
+{
+    const char* google_dns_server = "8.8.8.8", *ip = NULL;
+    int dns_port = 53;
+    struct sockaddr_in name;
+    socklen_t namelen = sizeof(name);
+    struct sockaddr_in serv;
+    static char buffer[20];
+    int sock = socket ( AF_INET, SOCK_DGRAM, 0);
+    if(sock < 0) {
+        perror(ERROR_STRING);
+        return NULL;
+    }
+
+    memset( &serv, 0, sizeof(serv) );
+    serv.sin_family = AF_INET;
+    serv.sin_addr.s_addr = inet_addr( google_dns_server );
+    serv.sin_port = htons( dns_port );
+
+    if (0 != connect( sock , (const struct sockaddr*) &serv , sizeof(serv) )
+            || 0 != getsockname(sock, (struct sockaddr*) &name, &namelen)
+            || !inet_ntop(AF_INET, &name.sin_addr, buffer, sizeof(buffer) ))
+        goto err;
+
+    ip = buffer;
+
+err:
+    if (!ip)
+        printf("%s: %s\n" , ERROR_STRING, strerror(errno));
+    if (sock > 0)
+        close(sock);
+
+    return ip;
+}

virtualsmartcard/src/vpcd-config/qransi.c

@@ -0,0 +1,45 @@
+/* Derived from https://github.com/bengl/qransi by Bryan English */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <qrencode.h>
+
+#define WHITE "\033[47m  \033[0m"
+#define BLACK "\033[40m  \033[0m"
+
+void pixels(char* color, int size)
+{
+  int i;
+  for(i=0; i<size; i++)
+    printf("%s", color);
+}
+
+void whiteRow(int padding, int width)
+{
+  int i;
+  for(i=0; i<padding; i++) {
+    pixels(WHITE, (width+(padding*2)));
+    printf("\n");
+  }
+}
+
+int qransi (const char *encodable)
+{
+  int padding = 2;
+  QRecLevel level = QR_ECLEVEL_L;
+  int x, y, width;
+  unsigned char *data;
+  QRcode * code = QRcode_encodeString(encodable, 0, level, QR_MODE_8, 1);
+  width = code->width;
+  data = code->data;
+  whiteRow(padding, width);
+  for (y=0; y<width; y++) {
+    pixels(WHITE, padding);
+    for (x=0; x<width; x++, data++)
+      pixels(*data&1?BLACK:WHITE, 1); 
+    pixels(WHITE, padding);
+    printf("\n");
+  }
+  whiteRow(padding, width);
+  return 0;
+}

virtualsmartcard/src/vpcd-config/vpcd-config.c

@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2014 Frank Morgner
+ *
+ * This file is part of virtualsmartcard.
+ *
+ * virtualsmartcard 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.
+ *
+ * virtualsmartcard 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
+ * virtualsmartcard.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "vpcd.h"
+
+extern const char *local_ip (void);
+
+/* pcscd allows at most 16 readers. We will use 10.
+ * See PCSCLITE_MAX_READERS_CONTEXTS in pcsclite.h */
+#include <pcsclite.h>
+#define VICC_MAX_SLOTS \
+        (PCSCLITE_MAX_READERS_CONTEXTS > 6 ? \
+        PCSCLITE_MAX_READERS_CONTEXTS-6 : 1)
+
+#define ERROR_STRING "Unable to guess local IP address"
+
+
+
+#ifdef HAVE_QRENCODE
+
+#include "qransi.c"
+
+void print_qrcode(const char *uri)
+{
+    qransi (uri);
+}
+
+#else
+
+void print_qrcode(const char *uri)
+{
+    printf("https://api.qrserver.com/v1/create-qr-code/?data=%s\n", uri);
+}
+#endif
+
+
+ 
+int main ( int argc , char *argv[] )
+{
+    char slot;
+    char uri[60];
+    const char *ip = NULL;
+    int fail = 1, port;
+
+    ip = local_ip();
+    if (!ip)
+        goto err;
+
+    for (slot = 1; slot < VICC_MAX_SLOTS; slot++) {
+        port = VPCDPORT+slot-1;
+        printf("VPCD hostname:  %s\n", ip);
+        printf("VPCD port:      %d\n", port);
+        printf("On your NFC phone with the Remote Smart Card Reader app scan this code:\n", port);
+        sprintf(uri, "vpcd://%s:%d", ip, port);
+        print_qrcode(uri);
+        puts("");
+    }
+ 
+    fail = 0;
+
+err:
+    return fail;
+}