Problems porting Openssl 1.1.1d to zos.

Wendell Nichols wnichols at
Mon Nov 11 15:42:21 UTC 2019

Is there anyone on this group with experience with ebcdic platforms, 
specifically zOS?  I have built 1.1.1d on zOS and connections to my 
server work for firefox 60 but not newer versions.  I don't know exactly 
where the cut off is or what they changed but current versions get an 
HMAC error.  I strongly suspect that it is keying the hmac with some 
combination of inputs that include an improperly translated text string, 
but I don't know for sure.  Its quite hard to track down when you don't 
have a debugger.

The error message:

> An error occurred during a connection to SSL 
> received a record with an incorrect Message Authentication Code. Error 

If anyone can suggest an approach to figuring this out I'd be grateful.

Wendell Nichols

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