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o-gs / dji-firmware-tools

Tools for handling firmwares of DJI products, with focus on quadcopters.
GNU General Public License v3.0
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Signed image file head signature has unexpected size #292

Open AntonKukoba1 opened 1 year ago

AntonKukoba1 commented 1 year ago

Mavic Pro 3 firmwares contain 0802 module firmware which is PRAK-UFIE encrypted. But pkghead.signature_size is 384 bytes, i.e. it's RSA-3072. Thus I get:

Signed image file head signature has unexpected size

Is there any key which I could try to use to unpack 0802 module?

milenovic commented 6 months ago

The signature verification issue can be bypassed by not specifying the PRAK key, adding the -f option to force decrypt, and using -k UFIE-2022-08.