to fix the following linker error:
/usr/bin/ld: nuttx.rel: in function `aes_encrypt_xform':
/github/workspace/sources/nuttx/crypto/xform.c:509: undefined reference to `aes_encrypt'
/usr/bin/ld: nuttx.rel: in function `aes_decrypt_xform':
/github/workspace/sources/nuttx/crypto/xform.c:514: undefined reference to `aes_decrypt'
/usr/bin/ld: nuttx.rel: in function `aes_setkey_xform':
/github/workspace/sources/nuttx/crypto/xform.c:519: undefined reference to `aes_setkey'
/usr/bin/ld: nuttx.rel: in function `aes_ctr_crypt':
/github/workspace/sources/nuttx/crypto/xform.c:566: undefined reference to `aes_encrypt'
/usr/bin/ld: nuttx.rel: in function `aes_ctr_setkey':
/github/workspace/sources/nuttx/crypto/xform.c:585: undefined reference to `aes_setkey'
/usr/bin/ld: nuttx.rel: in function `aes_ofb_encrypt':
/github/workspace/sources/nuttx/crypto/xform.c:694: undefined reference to `aes_encrypt'
/usr/bin/ld: nuttx.rel: in function `aes_ofb_setkey':
/github/workspace/sources/nuttx/crypto/xform.c:706: undefined reference to `aes_setkey'
/usr/bin/ld: nuttx.rel: in function `aes_cfb8_encrypt':
/github/workspace/sources/nuttx/crypto/xform.c:733: undefined reference to `aes_encrypt'
/usr/bin/ld: nuttx.rel: in function `aes_cfb8_decrypt':
/github/workspace/sources/nuttx/crypto/xform.c:751: undefined reference to `aes_encrypt'
/usr/bin/ld: nuttx.rel: in function `aes_cfb128_encrypt':
/github/workspace/sources/nuttx/crypto/xform.c:765: undefined reference to `aes_encrypt'
/usr/bin/ld: nuttx.rel: in function `aes_cfb128_decrypt':
/github/workspace/sources/nuttx/crypto/xform.c:781: undefined reference to `aes_encrypt'
/usr/bin/ld: nuttx.rel: in function `aes_gmac_setkey':
/github/workspace/sources/nuttx/crypto/gmac.c:135: undefined reference to `aes_setkey'
/usr/bin/ld: /github/workspace/sources/nuttx/crypto/gmac.c:143: undefined reference to `aes_encrypt'
/usr/bin/ld: nuttx.rel: in function `aes_gmac_final':
/github/workspace/sources/nuttx/crypto/gmac.c:195: undefined reference to `aes_encrypt'
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Entropy pool gathers environmental noise from device drivers, user-space, etc., and returns good random numbers, suitable for cryptographic use. Based on entropy pool design from *BSDs and uses BLAKE2Xs algorithm for CSPRNG output.
Patch also adds /dev/urandom support for using entropy pool RNG and new 'getrandom' system call for getting randomness without file-descriptor usage (thus avoiding file-descriptor exhaustion attacks). The 'getrandom' interface is similar as 'getentropy' and 'getrandom' available on OpenBSD and Linux respectively.
