$ cat writeup.md…
$ cat writeup.md…
Hack.lu2026
Task: decrypt a `VLT1` password safe; the Go+cgo vault delegates key derivation to a stripped native libkdf.so. Solution: reverse the native KDF, find strlen() truncating the binary SHA-256 digest, brute force the 2-byte effective PBKDF2 password and AES-GCM-decrypt with the header as AAD.
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