ASN.1 BER file decoding
 

Hi,

Can somebody tell how to open ASN.1 coded hex file using any utiliy in Linux and how to decode it.

how to open ASN.1 coded hex file
Open as in "show structure" see "man asn1parse" from the OpenSSL toolkit.


how to decode it.
BER is a subformat of DER which is encoding for ASN.1.
Since OpenSSL generates PEM, to convert PEM to DER your route would be:
"openssl x509 -inform PEM -outform DER -in cert.pem -out cert.der"
so reversing the route should then be:
"openssl x509 -inform DER -outform PEM -in cert.der -out cert.pem".
"man x509" for more information.