OpenSSL 3 port

The following are notes on the OpenSSL 3 port extracted from issue #215

SHAxyz_Init(), SHAxyz_Update(), SHAxyz_Final()

See discussion here

I doubt that we can replace SHA1_Init, SHA1_Update, SHA1_Final and the same API calls for SHA256, SHA384, and SHA512. We need access to the hash contexts so that the TPM 2 can offer an API for Init/Update/Final and an do a suspend/resume any time in between them.

They are renamed to this here in TPM 2:

#define tpmHashStateSHA1_t        SHA_CTX
#define tpmHashStateSHA256_t      SHA256_CTX
#define tpmHashStateSHA384_t      SHA512_CTX
#define tpmHashStateSHA512_t      SHA512_CTX
#define tpmHashStateSM3_256_t     SM3_CTX

EC_KEY_set_group(eckey, G)

See discussion here

The function EC_KEY_set_group(eckey, G) is deprecated but it is not obvious what the replacement is, if there is any.