feat: add initial implementation of osiris, the TLS terminator for Anubis

Signed-off-by: Xe Iaso <me@xeiaso.net>

cmd/osiris/internal/config/tls_test.go

@@ -0,0 +1,48 @@
+package config
+
+import (
+	"errors"
+	"testing"
+)
+
+func TestTLSValid(t *testing.T) {
+	for _, tt := range []struct {
+		name  string
+		input TLS
+		err   error
+	}{
+		{
+			name: "simple selfsigned",
+			input: TLS{
+				Cert: "./testdata/tls/selfsigned.crt",
+				Key:  "./testdata/tls/selfsigned.key",
+			},
+		},
+		{
+			name: "files don't exist",
+			input: TLS{
+				Cert: "./testdata/tls/nonexistent.crt",
+				Key:  "./testdata/tls/nonexistent.key",
+			},
+			err: ErrCantReadTLS,
+		},
+		{
+			name: "invalid keypair",
+			input: TLS{
+				Cert: "./testdata/tls/invalid.crt",
+				Key:  "./testdata/tls/invalid.key",
+			},
+			err: ErrInvalidTLSKeypair,
+		},
+	} {
+		t.Run(tt.name, func(t *testing.T) {
+			if err := tt.input.Valid(); !errors.Is(err, tt.err) {
+				t.Logf("want: %v", tt.err)
+				t.Logf("got:  %v", err)
+				t.Error("got wrong error from validation function")
+			} else {
+				t.Log(err)
+			}
+		})
+	}
+}