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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black;background:white'>Hello, </span><span style='font-size:10.0pt;font-family:"Verdana",sans-serif;color:black'><br><span style='background:white'>I have a signedData package that contains an encryptedKeyPackage (specifically OID 2.16.840.1.101.2.1.2.78.2, aka id-ct-KP-encryptedKeyPkg) that I want to extract from it. I am somewhat able to extract the sequence that contains this data via the OpenSSL command line: </span><br><br><span style='background:white'>$ openssl asn1parse -in <my_pkg.der> -inform DER -strparse <hard-coded offset I computed></span><br><br><span style='background:white'>However, I am looking for the OpenSSL calls to do the same thing, ideally extract package contents by its OID without having to know the offset (such that I can extract the data from any given package by that particular OID). How would I go about doing this? I've been looking endlessly into asn1.h and x509.h, and am able to somewhat parse the entire package into a structure, but I could use some guidance as to how to further break it down into parts. Thank you, and I hope to hear a response back soon. </span></span><o:p></o:p></p></div></body></html>