This is the source code for iDecryptIt, an IPSW firmware decryption tool. It is currently in the process of an almost complete rewrite.
iDecryptIt is licensed under GNU General Public License 3.0 or later (SPDX identifier: GPL-3.0-or-later). The source code of xpwn (with commit hash ac362d4f) was consulted for the creation of the various file format readers.