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S/Key implementation question
Just out of curiosity I've been looking at the implementation of S/Key. I
have been unable to figure out what purpose this function has:
/* Make sure line is all seven bits */
*s++ &= 0x7f;
It's called with the seed and pass phrase passed to i before it is passed
through the hash algorithm. What function does this serve? I haven't
been able to identify anything in the related rfc (1938). Can someone
give me an idea?
Please reply to me as I am not a normal list subscriber.