This is xnu-8019. See this file in:
Directory listing for xnu-8019//libkern/crypto
corecrypto_aes.c
corecrypto_aesxts.c
corecrypto_chacha20poly1305.c
corecrypto_des.c
corecrypto_md5.c
corecrypto_rand.c
corecrypto_rsa.c
corecrypto_sha1.c
corecrypto_sha2.c
register_crypto.c