chore: add patch check

main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"embed"
+	"fmt"
 	"io"
 	"io/fs"
 	"log"
@@ -9,6 +10,7 @@ import (
 	"github.com/evcc-io/evcc/cmd"
 	"github.com/evcc-io/evcc/server"
 	_ "github.com/evcc-io/evcc/util/goversion" // require minimum go version
+	"golang.org/x/crypto/cryptobyte"
 )
 
 //go:embed dist
@@ -30,5 +32,12 @@ func main() {
 	// see https://github.com/golang/oauth2/issues/487
 	log.SetOutput(io.Discard)
 
+	// Test if go is patched for accepting the buggy Elli certificate
+	var res bool
+	b := cryptobyte.String([]byte{0x01, 0x01, 0x01})
+	if ok := b.ReadASN1Boolean(&res); !ok || !res {
+		panic(fmt.Sprintf("Crypto patch missing. Run `make patch-asn1` before compiling. Debug: %v/%v (want: true/true).", ok, res))
+	}
+
 	cmd.Execute()
 }