On 12/29/2018 7:53 AM, Jakob Bohm via openssl-users wrote: > Well, these two latter arrays look like a stray copy of the HMAC > constants "ipad" and "opad", which (while looking like ASCII), are > defined as exact hex constants even on a non-ASCII machine, such > as PDP-11 or an IBM mainframe.
PDP-11 used ASCII. So did all of the PDP series, though some used a six-bit (no lowercase) variant for some purposes. -- Jordan Brown, Oracle Solaris
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