needed for foc/qemu/x86_32
- libc and nic driver are currently not available on RISC-V issue #4021
- to compare crypted text with host openssl Fixes #3905
The 'aes_cbc_4k' library is simple wrapper around libsparkcrypto to serve as a backend for storage encryption. It operates on data chunks of 4 KiB and uses AES-CBC while incorporating the block number and the private key as salt values.