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