chore: Seperate code into multiple files for client and server.

client/typing.go

@@ -0,0 +1,46 @@
+package client
+
+import (
+	"net"
+
+	"github.com/ProtonMail/gopenpgp/v3/crypto"
+)
+
+// Checks to see if a certificate is trusted in the client cache.
+//
+//   - `host`: The host of the server.
+//   - `certificateFingerprint`: A fingerprint of the servers key.
+//   - `isSelfSigned`: If true, the certificate is either actually self-signed, or
+//     verification is dsabled (CheckIfCertificatesAreSigned in BismuthClient is false)
+//   - `isTrustworthy`: If true, the certificate is signed by 51% of peers.
+type CertCheckCallback func(host, certificateFingerprint string, isSelfSigned, isTrustworthy bool) bool
+
+// Connects to a server using a provided method, with host being the host:
+//
+// OwnConnMethodCallback("google.com:80")
+type OwnConnMethodCallback func(address string) (net.Conn, error)
+
+// Bismuth Client
+type BismuthClient struct {
+	// GOpenPGP public key
+	PublicKey *crypto.Key
+	// GOpenPGP private key
+	PrivateKey *crypto.Key
+
+	// Check if the certificates are signed if enabled.
+	//
+	// If true, "cross-verifies" the server to make sure the certificates are signed.
+	//
+	// If false, all certificates will be reported as being self signed because we can't
+	// really prove otherwise.
+	CheckIfCertificatesAreSigned bool
+	// Checks to see if a certificate is trusted in the client cache.
+	// See CertCheckCallback for more typing information.
+	CertificateSignChecker CertCheckCallback
+
+	// Connects to a server (used for CheckIfCertificatesAreSigned if enabled/set to true).
+	ConnectToServer OwnConnMethodCallback
+
+	// GopenPGP instance
+	pgp *crypto.PGPHandle
+}