Initial commit

break_script/break_aes.jl

@@ -0,0 +1,20 @@
+#!/usr/bin/env julia
+
+include("util.jl")
+include("sbox.jl")
+include("plotutils.jl")
+
+function break_aes()
+    plaintexts = load_file("plaintexts.dat", UInt8)[1:10_000, :]
+    timings = load_file("timings.dat", UInt32)[1:10_000]
+    t_values = Vector{Float64}(undef, 0x100)
+    for key=0:0xFF
+        msb_set = (sbox[(plaintexts[:, 1] .⊻ key) .+ 1] .& 0x80) .!= 0
+        group_slow = timings[msb_set]
+        group_fast = timings[msb_set.==false]
+        t_values[key + 1] = t_val(group_fast, group_slow)
+    end
+    plot_discrete_tval(0:0xFF, t_values, "key")
+end
+
+@time break_aes()