A CSR is most commonly a PKCS#10 object and therefore defined in ASN.1 and encoded in DER. https://github.com/openssl/openssl/blob/master/crypto/include/internal/x509_int.h#L53 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mta.openssl.org/pipermail/openssl-users/attachments/20190829/91616ca4/attachment.html>