Cannot use HMACEngine with SHA2Engine

[micheleselea]

We can't use HMACEngine with SHA2Engine because SHA2Engine has not

enum
	{
		BLOCK_SIZE  = Engine::BLOCK_SIZE,
		DIGEST_SIZE = Engine::DIGEST_SIZE
	};

these works fine instead:

Poco::HMACEngine<Poco::MD5Engine> hmac(key);
Poco::HMACEngine<Poco::SHA1Engine> hmac1(key);

[micheleselea]

the only way I found to use it is like this:

class SHA256Engine : public Poco::SHA2Engine {
public:
	enum
	{
		BLOCK_SIZE = 64,
		DIGEST_SIZE = 32
	};
	SHA256Engine() :Poco::SHA2Engine(Poco::SHA2Engine::ALGORITHM::SHA_256) {
	}
	virtual ~SHA256Engine() {
	}
};

std::string secret("sharedsecrettest");
Poco::HMACEngine<SHA256Engine> hmac(secret);

[crew1274]

in 1.12.2 still has this issue

[micheleselea]

you can use SHA2Engine256