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Godot's source code in Java to illustrate the eID card's main functionality

You should also have a look at the applets I finetuned for the eID card. Four applets are available (so far):

1. a tool to view the content of an eID card and which allows you to securely change your pin on your smartcard reader (provided you are using a DP 850), or via a pseudo-secure pinpad.
2. an ssh applet to establish a secure shell between your local computer and a (remote) ssh server. If the applet finds a DP 850 smartcard reader, you will be asked to enter your PIN on that reader, if not, you will be asked to enter your PIN through my very neat pseudo-secure PIN pad.
3. an sftp applet to establish a secure file transfer application to securely transfer files between your local computer and a (remote) ssh server. You can enter your PIN through the cool pseud-secure PIN pad, or on the pin pad reader.
4. an applet which allows you to read out your public (authentication) key. The (remote) ssh server requires this key in the ~/.ssh/authorized_keys file if you want to use the ssh and/or sftp applets...

The source code for these applets is available in the respective jar files. They are based on the source code you find below. The code has been tested using j2se version 1.4.2_05 sdk on Windows XP and Linux/debian with reasonably recent versions of the mainstream browsers (Opera, Mozilla, FireFox? , Internet Explorer, Netscape).

Open source software to illustrate the eID card's basic functionality -- no guarantees -- undocumented -- use at your own risk ];->>

System requirements:

1. a smartcard reader supported by your operating system and a properly configured pcsc service/daemon. The installation and configuration of your smartcard reader and corresponding system drivers is beyond this page's scope.
2. a decent computer system with java (mandatory) and openssl (optional: only necessary if you wish to interpret or verify the eid card's certificates). I use the linux variant of j2sdk1.4.2 as can be found at http://java.sun.com and the openssl which comes with a plain debian installation. I use j2sdk1.4.2 and win32openssl-v0.9.7d on windows xp. The installation and configuration of this software is beyond this page's scope. Have a look at my knoppix installation instructions if you do not feel comfortable with your alien operating system ];-)
3. a software bridge between the java application and the pcsc service/daemon. I use JPCSC, which is a JNI library offering Java applications the access to PCSC functions by mapping their requests to an underlying native PCSC implementation. The software found below thus depend on JPCSC to communicate with real smart cards. JPCSC depends on a properly installed and setup PCSC environment. Especially, the LD_LIBRARY_PATH should list the directories where the PCSC client libraries and the native JPCSC library libjpcsc.so are installed, the CLASSPATH variable should list the JPCSC jar file jpcsc.jar. If the installation procedure below is followed, these issues will automatically be dealt with. The ``official'' PCSC package can be found here. If you follow the procedure below, all system/environment settings will automatically be set up to provide a working environment.

# For windows users: unpack the zip file generation.one.v0007.zip in c:\ so that the unzip program can propagate its content into c:\eid. I use the script c:\eid\eid.script.bat to test the functionality described on this page (this batch file relies on the existance of a decent java virtual machine (i.e., the command ``java'') somewhere in the default path). This script creates a directory c:\eid.data to store its output.

# Quick pointer to what you need if you are using a Unix variant:

• # setting it up:
  1. # system configuration (may be a system-wide setting, or must be set before going any further)
  2. # unpack jpcsc (has to be done only once)
  3. # unpack eID code (has to be done only once)
  4. # compile eID code (has to be done only once)
• # reading out citizen-related stuff:
  1. # read out the citizen's main address
  2. # read out the citizen's personal details
  3. # read out the citizen's picture
• # generating signatures at the lowest level:
  1. # generate a non-repudiation signature with the eID card
  2. # generate an authentication signature with the eID card
• certificate-specific stuff:
  1. # read out the RootCA? certificate
  2. # read out the CA certificate
  3. # read out the RRN certificate
  4. # read out the citizen's certificates
  5. # convert these certificates to make them more human-readable
  6. # convert these certificates to prepare (cryptographic) certificate validation
  7. # verify all these certificates
  8. # show all these certificates

# Unix users may paste the following instructions:

• # propagating the eID configuration settings:

  # location of the eID-specific code and jpcsc library: export BELPIC=~/eid mkdir -p $BELPIC/tarfiles $BELPIC/sources $BELPIC/pcsc # specifying the java virtual machine which is used on this machine: if test :$JAVA_HOME: = ::;then export JAVA_HOME=/usr/lib/j2sdk1.4.2_05 fi if test -e $JAVA_HOME/bin/javac then echo -n else echo SERIOUS PROBLEM: Could not find a java compiler... fi export PATH=$JAVA_HOME/bin:$PATH # specification of the source code and jpcsc files: export CLASSPATH=$BELPIC/sources:$BELPIC/jpcsc/bin/jpcsc.jar # location of precompiled native jpcsc libary: export LD_LIBRARY_PATH=$BELPIC/jpcsc/build/linux:$BELPIC/pcsc/lib # determine where you will store the data read out from the eID card: export BELPICDATA=$BELPIC/data mkdir -p $BELPICDATA

• # unpack and configure pcsc:

  cd $BELPIC/pcsc wget https://alioth.debian.org/download.php/419/pcsc-lite-1.2.0.tar.gz tar -xzvf pcsc-lite-1.2.0.tar.gz cd pcsc-lite-1.2.0 ./configure --prefix=$BELPIC/pcsc --enable-usbdropdir=$BELPIC/pcsc/drivers --enable-muscledropdir=$BELPIC/pcsc/services make install cd $BELPIC/pcsc/lib ln -s libpcsclite.so.0 libpcsclite.so.1

• # extract the jpcsc archive into $BELPIC:

  cd $BELPIC/tarfiles if wget http://godot.studentenweb.org/site/EidCards/eidApplications/javaCode/jpcsc-0.8.0.zip then echo successfully fetched the bridge software between the java source code and the smartcard reader echo echo problem fetching the bridge software between the java source code and the smartcard reader =====================================;fi cd $BELPIC if unzip $BELPIC/tarfiles/jpcsc-0.8.0.zip then echo everything has successfully been untarred else echo problem untarring the bridge software =====================================;fi cd $BELPIC/jpcsc sed s/'usr\/local\/pcsc'/'${BELPIC}\/pcsc'/ Config > Config.tmp mv Config.tmp Config make

• # fetch and unpack the source code into $BELPIC/sources:

  cd $BELPIC/tarfiles if wget http://godot.studentenweb.org/site/EidCards/eidApplications/javaCode/generation.one.v0007.tgz then echo successfully fetched the source code else echo problem fetching the source code =====================================;fi cd $BELPIC/sources # All files are self-explanatory if tar -xzvf $BELPIC/tarfiles/generation.one.v0007.tgz then echo everything has successfully been untarred else echo problem untarring the source code =====================================;fi

• # compile the source code
  # you can toggle the booleans showApdus and/or debugMode if you wish to see more communication details

  if javac `find be -name \*java` then echo all the code has successfully been compiled else echo problem compiling the source code =====================================;fi

• # read out the citizen's certificates:

  if java be.godot.sc.apps.eid.be.ScReadNonRepudiationCertificate $BELPICDATA/citizen.identification.certificate.der then if java be.godot.sc.apps.eid.be.ScReadAuthenticationCertificate $BELPICDATA/citizen.authentication.certificate.der then echo successfully read out the authentication and non-repudiation certificates of the citizen else echo problem reading out the authentication certificate =====================================;fi else echo problem reading out the non-repudiation certificate =====================================;fi

• # read out the citizen's main address:

  if java be.godot.sc.apps.eid.be.ScReadCitizenAddressData $BELPICDATA/citizen.address.bin > $BELPICDATA/citizen.address.txt then cat $BELPICDATA/citizen.address.txt else echo problem reading out citizen address data =====================================;fi

• # read out the citizen's personal data:

  if java be.godot.sc.apps.eid.be.ScReadCitizenIdentityData $BELPICDATA/citizen.identity.file.bin > $BELPICDATA/citizen.identity.file.txt then cat $BELPICDATA/citizen.identity.file.txt else echo problem reading out the citizen data =====================================;fi

• # read out the citizen's picture file:

  if java be.godot.sc.apps.eid.be.ScReadCitizenPhoto $BELPICDATA/citizen.photo.jpg then echo successfully read the citizen photo else echo problem reading the citizen photo =====================================;fi

• # read out the government's Root CA certificate:

  if java be.godot.sc.apps.eid.be.ScReadRootCACertificate $BELPICDATA/citizen.rootca.der then echo successfully read the root ca certificate else echo problem reading the root ca certificate =====================================;fi

• # read out the government's CA certificate:

  if java be.godot.sc.apps.eid.be.ScReadCACertificate $BELPICDATA/citizen.ca.der then echo successfully read the citizen ca certificate else echo problem reading the citizen ca certificate =====================================;fi

• # read out the RRN certificate:

  if java be.godot.sc.apps.eid.be.ScReadRRNCertificate $BELPICDATA/rrn.certificate.der then echo successfully read the RRN certificate else echo problem reading the RRN certificate =====================================;fi

• # convert the various certificates from DER format to PEM format, which is necessary to verify these certificates:

  if openssl x509 -in $BELPICDATA/citizen.rootca.der -inform DER -outform PEM -out $BELPICDATA/citizen.rootca.pem then if openssl x509 -in $BELPICDATA/rrn.certificate.der -inform DER -outform PEM -out $BELPICDATA/rrn.certificate.pem then if openssl x509 -in $BELPICDATA/citizen.ca.der -inform DER -outform PEM -out $BELPICDATA/citizen.ca.pem then if openssl x509 -in $BELPICDATA/citizen.identification.certificate.der -inform DER -outform PEM -out $BELPICDATA/citizen.identification.certificate.pem then if openssl x509 -in $BELPICDATA/citizen.authentication.certificate.der -inform DER -outform PEM -out $BELPICDATA/citizen.authentication.certificate.pem; then echo successfully converted all certificates from DER to PEM format else echo problem converting the authentication certificate =====================================;fi else echo problem converting the non-repudiation certificate =====================================;fi else echo problem converting the citizen ca certificate =====================================;fi else echo problem converting the root ca certificate =====================================;fi else echo problem converting the RRN certificate =====================================;fi

• # convert the various certificates from PEM format to TXT format, which makes them easier to read:

  cd $BELPICDATA for a in *pem;do if openssl x509 -in $a -text > `basename $a .pem`.txt then echo successfully converted $a else echo problem converting $a =====================================;fi done

• # verify the cryptographic correctness of the various certificates:

  if openssl verify -CAfile $BELPICDATA/citizen.rootca.pem $BELPICDATA/citizen.rootca.pem then if openssl verify -CAfile $BELPICDATA/citizen.rootca.pem $BELPICDATA/citizen.ca.pem then cat $BELPICDATA/citizen.rootca.pem $BELPICDATA/citizen.ca.pem > $BELPICDATA/trusted.certificates.txt if openssl verify -CAfile $BELPICDATA/trusted.certificates.txt $BELPICDATA/citizen.identification.certificate.pem then if openssl verify -CAfile $BELPICDATA/trusted.certificates.txt $BELPICDATA/citizen.authentication.certificate.pem then echo successfully verified the non-repudiation and authentication certificates of the citizen and the certificates of the root ca and the citizen ca else echo problem detected with the authentication certificate of the citizen =====================================;fi else echo problem detected with the non-repudiation certificate of the citizen =====================================;fi else echo problem detected with the citizen ca certificate =====================================;fi else echo problem detected with the root ca certificate =====================================;fi

• # show the various certificates using openssl:

  if openssl x509 -in $BELPICDATA/citizen.rootca.der -inform DER -text -noout then if openssl x509 -in $BELPICDATA/citizen.ca.der -inform DER -text -noout then if openssl x509 -in $BELPICDATA/citizen.identification.certificate.der -inform DER -text -noout then if openssl x509 -in $BELPICDATA/citizen.authentication.certificate.der -inform DER -text -noout then echo successful dump of the authentication and non-repudiation certificates of the citizen and of the root ca and the citizen ca else echo problem dumping the authentication certificate =====================================;fi else echo problem dumping the non-repudiation certificate =====================================;fi else echo problem dumping the citizen ca certificate =====================================;fi else echo problem dumping the root ca certificate =====================================;fi

  

• # generate and verify a non-repudiation/identification signature:

  if java be.godot.sc.apps.eid.be.ScGenerateAndVerifyNonRepudiationSignature then echo non-repudiation signature successfully generated else echo problem generating the non-repudiation signature =====================================;fi

• # generate and verify an authentication signature:

  if java be.godot.sc.apps.eid.be.ScGenerateAndVerifyAuthenticationSignature then echo authentication signature successfully generated else echo problem generating the authentication signature =====================================;fi

  

• # verify the digital signature produced by a Belgian eID card using, e.g., Mozilla Mail. Mozilla Mail creates s/mime messages that can be validated as follows (assume the email message is stored in smime.txt). Make sure the file smime.txt contains only one email message which starts with something like 'From whoever@whereverREMOVE_THESE_UPPERCASE_LETTERS.com Tue Jul 10 18:07:25 2004'. If the sender's certificate was issued by a Non-Belgian eID card CA, you should add that certificate's root ca's certificate in pem-format to the cafile:

  wget http://certs.eid.belgium.be/belgiumrca.crt openssl x509 -in belgiumrca.crt -inform der -outform pem -out cafile echo starting signature verification... if openssl smime -in smime.txt -CAfile cafile -verify -out email.content.txt -signer signer.certificate then echo the email signer used the following certificate: openssl x509 -in signer.certificate -text -noout echo echo the email contains: === begin ======= cat email.content.txt echo echo email content: === end ======= echo signature was cryptographically correct else echo signature was ======== INVALID ============ fi

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