[openssl-dev] Need Help with BIO callback and/or BIO filter chain

[W Smith]

Hi,

I've been tasked with wrapping OpenSSL encrypted traffic in another protocol (HTTP).

I'm able to intrude on the data stream with the BIO callback feature (BIO_set_callback), and have also created a BIO filter to play with. My problem is that the BIO I have access to seems to be the BIO pair above encryption. I need to insert plain text/unencrypted data into the stream, which suggests I need to locate the ultimate source/sink.

All I have access to is the SSL context (SSL*) and the BIO*. The actual code is exceptionally convoluted/fragile, so it would be great to put my modifications only in the BIO callback or in a BIO filter.

Any comment on how that can be done or whether I should take another approach would be appreciated.

Thanks in advance,

W
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