Since Ed25519 curve primitives are available since cryptography package
version 2.6 need to bump its version.
Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
Some platforms prefer images in the Intel Hex (.hex) format. Implement
support for signing images in this format in imgtool.
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
Instead of relying on distro packages standardize the imgtool
dependencies into a requirements.txt.
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>