Foundation PassportLatest release: v1.0.8 ( 31st December 2021 ) 🔍 Last analysed 10th January 2022 . Reproducible when tested
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The following Analysis is not a full code review! We plan to make code reviews available in the future but even then it will never be a stamp of approval but rather a list of incidents and questionable coding practice. Nasa sends probes to space that crash due to software bugs despite a huge budget and stringent scrutiny.
Do your own research!
Try out searching for "lost bitcoins", "stole my money" or "scammers" together with the wallet's name, even if you think the wallet is generally trustworthy. For all the bigger wallets you will find accusations. Make sure you understand why they were made and if you are comfortable with the provider's reaction.
The Analysis ¶
The provider released a new version. Here we try to reproduce it again, using our test script (?):
$ ./scripts/test/hardware/passport.sh 1.0.8 ... ad6b4f5f4ae0b7e05ec35415713ea1ff7dde3edf10870876b1c8bd07391419d1 build-Passport/firmware.bin root@cae95eed5f75:/passport-firmware/ports/stm32# exit ad6b4f5f4ae0b7e05ec35415713ea1ff7dde3edf10870876b1c8bd07391419d1 - ad6b4f5f4ae0b7e05ec35415713ea1ff7dde3edf10870876b1c8bd07391419d1 firmware-passport-v1.0.8.bin
As with other hardware wallets, we did not check if those clipped bytes are signatures or valid but leave that to actual code reviews: If the code of the hardware wallet does what is claimed, it interprets those bytes as signatures and checks them. In other words, if the public source code is secure, then the link with the binary is established. This product is reproducible.
The binary provided was reproducible from the code provided.
As part of our Methodology, we ask:Does the binary we built differ from what we downloaded? If not, we tag it Reproducible
If we can reproduce the binary we downloaded from the public source code, with all bytes accounted for, we call the product reproducible. This does not mean we audited the code but it’s the precondition to make sure the public code has relevance for the provided binary.
If the provider puts your funds at risk on purpose or by accident, security researchers can see this if they care to look. It also means that inside the company, engineers can verify that the release manager is releasing the product based on code known to all engineers on the team. A scammer would have to work under the potential eyes of security researchers. He would have to take more effort in hiding any exploit.
“Reproducible” does not mean “verified”. There is good reason to believe that security researchers as of today would not detect very blatant backdoors in the public source code before it gets exploited, much less if the attacker takes moderate efforts to hide it. This is especially true for less popular projects.
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