Musca-S1 RSA keypair

A default RSA key pair is given to the Musca-S1 target.

Public keys were pre-compiled to targets/TARGET_ARM_SSG/TARGET_MUSCA_S1/prebuilt/mcuboot.bin and private key is in musca_s1-root-rsa-3072.pem for Secure image and musca_s1-root-rsa-3072_1.pem for Non-Secure image.

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.