Add signer method for pre-hashed data to allow tls/crypto to use openssl engines #120
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I have added a new method cal;led SignPKCS1v15Hash which allows the tls/crypto Signer method to use an openssl engine to sign data. A TPM (Trusted Platform Module) can then be used with Go code, using the library from here
https://git.kernel.org/pub/scm/linux/kernel/git/jejb/openssl_tpm2_engine.git
There is also a function LoadPrivateKeyFromPEMForEngine which loads the engine with the reference to the private key.