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fixed typos in picasso

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Signed-off-by: Julien CLEMENT <julien.clement@epita.fr>
This commit is contained in:
Julien CLEMENT 2023-05-04 10:20:56 +02:00
parent 8dcf9f9a82
commit e06fd7908f
1 changed files with 3 additions and 3 deletions
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jujure/content/writeups/fcsc_2023/picasso.md
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@ -164,7 +164,7 @@ allowed_moves += 0x28;
So I knew each sub-array is `0x28` bytes, and I saw that the index used to So I knew each sub-array is `0x28` bytes, and I saw that the index used to
iterrate the outer loop is the `shifter` variable, initialized to `0x3c` and iterrate the outer loop is the `shifter` variable, initialized to `0x3c` and
decremented by `4` each loop until it is strictly negative, so a total of `0x10` decremented by `4` each loop until it is strictly negative, so a total of `0x10`
iterations. We then have a matrix containing `0x10` arrays of `0x28`. iterations. We then have a matrix containing `0x10` arrays of `0x28` bytes.
I also knew that the `0x28` bytes corresponded to 5 `uint64_t` since the inner I also knew that the `0x28` bytes corresponded to 5 `uint64_t` since the inner
loop iterate over an `uint64_t *` loop iterate over an `uint64_t *`
@ -198,7 +198,7 @@ loop and basically lose.
So whatever this means, a valid move from a certain position in the board, must So whatever this means, a valid move from a certain position in the board, must
match with the `0` digit from the `board` being at certain indexes, which, for match with the `0` digit from the `board` being at certain indexes, which, for
now, since we did dig up the `allowed_moves` matrix yet, feel kind of arbitrary. now, since we did not dig up the `allowed_moves` matrix yet, feel kind of arbitrary.
Feeling confused ? Don't worry it will soon make sense. Feeling confused ? Don't worry it will soon make sense.
@ -508,4 +508,4 @@ Send your input on the remote service to retrieve the flag.
$ ./solve.py | nc challenges.france-cybersecurity-challenge.fr 2251 $ ./solve.py | nc challenges.france-cybersecurity-challenge.fr 2251
Password: Win! Password: Win!
FCSC{235b605a121bdd4b09adc4823bdf0967c446647c1ec69234813068a916fd83a6} FCSC{235b605a121bdd4b09adc4823bdf0967c446647c1ec69234813068a916fd83a6}
``` ```