Connect to aisa.fi.muni.cz using Putty or ssh, with xlogin and faculty password


Use WinSCP to copy copy_to_aisa.zip to your home/local (if no local there create using mkdir).

Change directory                             cd ~/local
Unzip with:                                         unzip copy_to_aisa.zip
Change access permissions:     chmod 777 asn1-install.sh
Install compiler with:                      ./asn1-install.sh
Try                                                          asn1c -help

Or install on your laptop from: https://github.com/vlm/asn1c


View ASN.1 structure of a file:


See the content of a certificate in Practice/copy_to_aisa/asn1c-working/csca.der:

openssl x509 -text -noout -inform DER -in csca.der

 Certificate:

     Data:

         Version: 3 (0x2)

         Serial Number: 1 (0x1)

         Signature Algorithm: 1.2.840.113549.1.1.10

         Issuer: C=CZ, O=Czech Republic, OU=Ministry of Interior, CN=CSCA_CZ

         Validity

             Not Before: Jul 24 00:00:00 2006 GMT

             Not After : Oct 24 23:59:59 2021 GMT

          Subject: C=CZ, O=Czech Republic, OU=Ministry of Interior, CN=CSCA_CZ

          Subject Public Key Info:

          Public Key Algorithm: rsaEncryption

          RSA Public Key: (3072 bit)

          Modulus (3072 bit):


Convert certificate from DER to PEM:

openssl x509 -out csca.pem -inform DER -in csca.der



Prepare the C and H files for the ASN.1 structures:

asn1c sod.asn1

Compiled AlgorithmIdentifier.c

Compiled AlgorithmIdentifier.h

Compiled LDSSecurityObjectVersion.c

Compiled LDSSecurityObjectVersion.h

Compiled DigestAlgorithmIdentifier.c

Compiled DigestAlgorithmIdentifier.h

Compiled LDSSecurityObject.c

Compiled LDSSecurityObject.h

Compiled DataGroupHash.c

Compiled DataGroupHash.h

Compiled DataGroupNumber.c

Compiled DataGroupNumber.h

Symlinked /usr/local/share/asn1c/ANY.h -> ANY.h

Symlinked /usr/local/share/asn1c/ANY.c -> ANY.c

Symlinked /usr/local/share/asn1c/INTEGER.h -> INTEGER.h

Symlinked /usr/local/share/asn1c/NativeEnumerated.h -> NativeEnumerated.h

Symlinked /usr/local/share/asn1c/INTEGER.c -> INTEGER.c


Compile a sample application:


Remove converter_example.c: rm converter_example.c
Compile: gcc *.c -o LDSview -I. -DPDU=LDSSecurityObject
And execute: ./LDSview