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break script: Print key

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This commit is contained in:
Manuel Vögele
2019-05-14 15:02:48 +02:00
parent 3bd80e8be5
commit 3887b041f6
1 changed files with 16 additions and 11 deletions
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19
break_script/break_aes.jl
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@@ -1,28 +1,33 @@
#!/usr/bin/env julia #!/usr/bin/env julia
include("util.jl") include("util.jl")
include("sbox.jl") #include("sbox.jl")
include("plotutils.jl") include("plotutils.jl")
import CSV
using Formatting
function parse_csv(filename) function parse_csv(filename)
println("Starting parsing")
data = CSV.read(filename, header=0) data = CSV.read(filename, header=0)
println("Parsing done") plaintexts::Matrix{UInt8} = convert(Matrix{UInt8}, data[:, 1:16])#[1:50, :]
plaintexts::Matrix{UInt8} = convert(Matrix{UInt8}, data[:, 1:16]) timings::Matrix{UInt32} = convert(Matrix{UInt32}, data[:, 17:17])#[1:50]
timings::Matrix{UInt32} = convert(Matrix{UInt32}, data[:, 17:17])
return plaintexts, timings return plaintexts, timings
end end
function break_aes() function break_aes()
plaintexts, timings = parse_csv("timing.csv") plaintexts, timings = parse_csv("timing.csv")
t_values = Vector{Float64}(undef, 0x100) t_values = Vector{Float64}(undef, 0x100)
for keybyte=1:16
for key=0:0xFF for key=0:0xFF
msb_set = (sbox[(plaintexts[:, 1] .⊻ key) .+ 1] .& 0x80) .!= 0 msb_set = (sbox[(plaintexts[:, keybyte] .⊻ key) .+ 1] .& 0x80) .!= 0
group_slow = timings[msb_set] group_slow = timings[msb_set]
group_fast = timings[msb_set.==false] group_fast = timings[msb_set.==false]
t_values[key + 1] = t_val(group_fast, group_slow) t_values[key + 1] = t_val(group_fast, group_slow)
end end
print(format("{:02x} ", argmax(t_values) - 1))
end
println()
plot_discrete_tval(0:0xFF, t_values, "key") plot_discrete_tval(0:0xFF, t_values, "key")
end end
@time break_aes() break_aes()