[openssl-users] Getting the retry reason for a "failed" BIO_write/BIO_read

Viktor Dukhovni openssl-users at dukhovni.org
Mon Oct 10 06:49:29 UTC 2016

> On Oct 10, 2016, at 2:20 AM, Ajay Garg <ajaygargnsit at gmail.com> wrote:
>            BIO *inter_bio;               // intermediate-bio, have no idea what it really is used for.

The internal BIO from BIO_new_bio_pair must be attached to the SSL
handle via:

    SSL_set_bio(ssl, internal_bio, internal_bio);

When SSL writes ciphertext to the internal bio, you can read that via
the network_bio.  When you write to the network_bio, SSL can read the
data via the internal_bio.


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