Hi,
I am currently writing my own TLS socket handshake and have all of it
working besides the record's mac generation. I am using the
TLS_RSA_WITH_AES_256_CBC_SHA
cipher suite which I expect the mac generation to be done with a HMAC_SHA
function as specified in the TLS 1.0 rfc specification. I have OpenSSL printing
out the parameters it uses to generate the mac and they match the parameters
that I am using and yet when I use the OpenSSL HMAC function with MD_sha1()
as the first parameter I get a different value. I have tried everything that
I can think of and can not work out how to calculate a matching mac.
Does anyone have any information on where I might be making my mistake?
Thanks,
James
