0
$\begingroup$

Where is an official documentation for ASN1 structure and values of x509 certs?

Using OpenSSL command like openssl asn1parse -in server.der -inform DER I can see how the cert is structured, but, for example, value OBJECT :sha256WithRSAEncryption is HEX 2A 86 48 86 F7 0D 01 01 0B, or countryName identifier is 55 04 06 - where are all this values documented?

$\endgroup$
1
3
$\begingroup$

ASN.1 is defined by the International Telecommunication Union (the ITU). ASN.1 stands for Abstract Syntax Notation One, and is a schema definition language. DER, as well as its base form BER, are serialization formats of the data defined by the ASN.1-specified schema.

ASN.1 and DER/CER/BER are specified in ITU-T-X series standards, available at the official ITU website. Information about OIDs are available at http://oid-info.com/

$\endgroup$
1

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.