image.py: Error on sign a firmware about mcuboot

[utzig]

Hmmm, I am not able to reproduce the error locally but seems related to dependencies. Please paste the output of pip show cryptography here.

[miyatsu]

The output of pip show cryptography get nothing.
When I checkout to tag v1.0, and run the same .sh, every thing is fine.
I will try this on other machine.

[utzig]

Recently imgtool.py has moved to depending only on cryptography instead of a bunch of different python crypto libraries. Strangely you don't get import errors, but try again after installing cryptography (pip install cryptography with or without sudo depending on your setup).

[miyatsu]

Fixed after #199 , commit id f242901