Method calcDigitalSignature

src/jrd/CryptoManager.cpp:1439–1477

	}

	void CryptoManager::calcDigitalSignature(thread_db* tdbb, string& signature, const Header& hdr)
	{
		/*
		We use the following items to calculate digital signature (hash of encrypted string)
		for database:
			hdr_flags & (hdr_crypt_process | hdr_encrypted)
			hdr_crypt_page
			hdr_crypt_plugin
			HDR_crypt_key
			HDR_crypt_hash
		*/

		signature.printf("%d %d %d %s",
			(hdr->hdr_flags & Ods::hdr_crypt_process ? 1 : 0),
			(hdr->hdr_flags & Ods::hdr_encrypted ? 1 : 0),
			hdr->hdr_crypt_page,
			hdr->hdr_crypt_plugin);

		ClumpletWriter hc(ClumpletWriter::UnTagged, hdr->hdr_page_size);
		hdr.getClumplets(hc);

		addClumplet(signature, hc, Ods::HDR_crypt_key);
		addClumplet(signature, hc, Ods::HDR_crypt_hash);

		const unsigned QUANTUM = 16;
		signature += string(QUANTUM - 1, '$');
		unsigned len = signature.length();
		len &= ~(QUANTUM - 1);

		loadPlugin(tdbb, hdr->hdr_crypt_plugin);

		string enc;
		FbLocalStatus sv;
		cryptPlugin->encrypt(&sv, len, signature.c_str(), enc.getBuffer(len));
		if (sv->getState() & IStatus::STATE_ERRORS)
			Arg::StatusVector(&sv).raise();

		Sha1::hashBased64(signature, enc);
	}


	void CryptoManager::digitalySignDatabase(thread_db* tdbb, CchHdr& hdr)