chore: remove non printable chars from gh token.

See falcosecurity/peribolos-syncer#17.

Signed-off-by: Federico Di Pierro <[email protected]>

go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/1Password/connect-sdk-go v1.5.3
 	github.com/google/go-github/v50 v50.2.0
 	github.com/jamesruan/sodium v1.0.14
+	github.com/pkg/errors v0.9.1
 	github.com/sirupsen/logrus v1.9.3
 	github.com/stretchr/testify v1.8.2
 	gopkg.in/yaml.v3 v3.0.1
@@ -18,7 +19,6 @@ require (
 	github.com/google/go-querystring v1.1.0 // indirect
 	github.com/kr/text v0.2.0 // indirect
 	github.com/opentracing/opentracing-go v1.2.0 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/uber/jaeger-client-go v2.30.0+incompatible // indirect
 	github.com/uber/jaeger-lib v2.4.1+incompatible // indirect

main.go

@@ -17,8 +17,10 @@ package main
 import (
 	"context"
 	"flag"
+	"github.com/pkg/errors"
 	"os"
 	"strings"
+	"unicode"
 
 	"github.com/falcosecurity/pigeon/pkg/pigeon"
 	"github.com/google/go-github/v50/github"
@@ -41,6 +43,26 @@ func init() {
 	flag.BoolVar(&verbose, "verbose", false, "enable verbose logging")
 }
 
+func getTokenFromFile(path string) (string, error) {
+	token, err := os.ReadFile(path)
+	if err != nil {
+		return "", errors.Wrap(err, "error reading token file")
+	}
+
+	return removeNonPrintableChars(string(token)), nil
+}
+
+func removeNonPrintableChars(s string) string {
+	return strings.Map(func(r rune) rune {
+		switch {
+		case unicode.IsPrint(r):
+			return r
+		default:
+			return -1
+		}
+	}, s)
+}
+
 func initOpts() {
 	flag.Parse()
 
@@ -55,12 +77,11 @@ func initOpts() {
 			logrus.Fatal(`Github token must be provided either through "gh-token" flag, or "GITHUB_AUTH_TOKEN" env."`)
 		}
 	}
-	ghTokBytes, err := os.ReadFile(ghToken)
+	var err error
+	ghToken, err = getTokenFromFile(ghToken)
 	if err != nil {
 		logrus.Fatal(err)
 	}
-	ghToken = string(ghTokBytes)
-	ghToken = strings.Trim(ghToken, "\n")
 
 	if confFile == "" {
 		logrus.Fatal(`"conf" flag must be set`)