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Diffstat (limited to 'solve/notes')
| -rw-r--r-- | solve/notes | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/solve/notes b/solve/notes new file mode 100644 index 0000000..6e0966e --- /dev/null +++ b/solve/notes @@ -0,0 +1,12 @@ +fuck this challenge, no interesting concepts, only tricky details + +look into zsh source, sind out that RANDOM uses C srand / rand + +srand is called on zsh init with epoch sec+usec seed + +we can guess the seed, filter using known values and do trial decryptions +to find the right one + +tricky detail: subshell does not modify the rand state of the parent shell +so in the encoded piece generation the random value does not change.. +haha that did not cost me my sanity |