Musca-B1 RSA keypair

A default RSA key pair is given to the Musca-B1 target.

Public key was pre-compiled to targets/TARGET_ARM_SSG/TARGET_MUSCA_B1/prebuilt/mcuboot.bin and private key is in musca_b1-root-rsa-3072.pem.

DO NOT use them in production code, they are exclusively for testing!

Private key must be stored in a safe place outside of the repository.

tools/psa/tfm/bin_utils/imgtool.py can be used to generate new key pairs.