(BTW, I have simulated the key schedule algorithm and the keystream matches the test vector here for a 5-byte key 0x0102030405, so I am at least mostly confident in my code's math.)
(BTW, I have simulated the key schedule algorithm and the keystream matches the test vector here for a 5-byte key 0x0102030405, so I am at least mostly confident in my code's math.)
I've been playing around with 8051 assembly lately and thought I would make a little project of implementing RC4, since it is pretty interesting and the algorithm doesn't seem too hard. Plus, taking mod 256 is REALLY easy when you're only working with single bytes :).
Below I've included my (hopefully well-commented) code. I based my algorithm on the description given on Wikipedia here and use the same naming conventions (ii, jj, S[i]S[i]). I am new to the 8051 and assembly in general and am just looking for any optimization advice. Do my uses of subroutines and the way I assigned i-l make sense? Am I failing to use important standard conventions?
I've been playing around with 8051 assembly lately and thought I would make a little project of implementing RC4, since it is pretty interesting and the algorithm doesn't seem too hard. Plus, taking mod 256 is REALLY easy when you're only working with single bytes :)
Below I've included my (hopefully well-commented) code. I based my algorithm on the description given on Wikipedia here and use the same naming conventions (i, j, S[i]). I am new to the 8051 and assembly in general and am just looking for any optimization advice. Do my uses of subroutines and the way I assigned i-l make sense? Am I failing to use important standard conventions?
I've been playing around with 8051 assembly lately and thought I would make a little project of implementing RC4, since it is pretty interesting and the algorithm doesn't seem too hard. Plus, taking mod 256 is REALLY easy when you're only working with single bytes.
Below I've included my (hopefully well-commented) code. I based my algorithm on the description given on Wikipedia here and use the same naming conventions (i, j, S[i]). I am new to the 8051 and assembly in general and am just looking for any optimization advice. Do my uses of subroutines and the way I assigned i-l make sense? Am I failing to use important standard conventions?