What libraries would you recommend for working with X.509 (.CER) certificate files in DER encoding?

Question

Java

I want to create a utility for printing certificate files (cer) according to a specific template. You need to open the certificate file and extract the value of all fields from there. What libraries can be used for this purpose? Interested in C ++ and JAVA (because I study them))).

Answer 1

OpenSSL look

Answer 2

org.bouncycastle.bcprov-jdk14 Can work well with certificates.
X509CertImpl Also java natively knows how to work with them, only handles do more.