refactor: Modify implementation of TLS (#457)

* refactor: Don't generate certificates programmatically

* build: Add testdata folder to .dockerignore

test/tls.go

@@ -1,72 +0,0 @@
-package test
-
-import (
-	"crypto/ecdsa"
-	"crypto/elliptic"
-	"crypto/rand"
-	"crypto/x509"
-	"crypto/x509/pkix"
-	"encoding/pem"
-	"fmt"
-	"log"
-	"math/big"
-	"os"
-	"time"
-)
-
-// UnsafeSelfSignedCertificates creates a pair of test certificates in the given test folder
-func UnsafeSelfSignedCertificates(testfolder string) (privateKeyPath string, publicKeyPath string) {
-	privateKeyPath = fmt.Sprintf("%s/cert.key", testfolder)
-	publicKeyPath = fmt.Sprintf("%s/cert.pem", testfolder)
-
-	key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
-	if err != nil {
-		log.Fatalf("Failed to generatekey: %v", err)
-	}
-
-	template := x509.Certificate{
-		SerialNumber: big.NewInt(1234),
-		Subject: pkix.Name{
-			Organization: []string{"Gatus test"},
-		},
-		NotBefore:             time.Now(),
-		NotAfter:              time.Now().Add(time.Hour * 24),
-		KeyUsage:              x509.KeyUsageDigitalSignature,
-		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
-		BasicConstraintsValid: true,
-		DNSNames:              []string{"localhost"},
-	}
-	derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, &key.PublicKey, key)
-	if err != nil {
-		log.Fatalf("Failed to create certificate: %v", err)
-	}
-
-	certOut, err := os.Create(publicKeyPath)
-	if err != nil {
-		log.Fatalf("Failed to open cert.pem for writing: %v", err)
-	}
-	if err := pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes}); err != nil {
-		log.Fatalf("Failed to write data to cert.pem: %v", err)
-	}
-	if err := certOut.Close(); err != nil {
-		log.Fatalf("Error closing cert.pem: %v", err)
-	}
-
-	keyOut, err := os.OpenFile(privateKeyPath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
-	if err != nil {
-		log.Fatalf("Failed to open %s for writing: %v", privateKeyPath, err)
-	}
-	privBytes, err := x509.MarshalPKCS8PrivateKey(key)
-	if err != nil {
-		log.Fatalf("Unable to marshal private key: %v", err)
-	}
-	if err := pem.Encode(keyOut, &pem.Block{Type: "PRIVATE KEY", Bytes: privBytes}); err != nil {
-		log.Fatalf("Failed to write data to key.pem: %v", err)
-	}
-	if err := keyOut.Close(); err != nil {
-		log.Fatalf("Error closing key.pem: %v", err)
-	}
-	log.Print("wrote key.pem\n")
-
-	return
-}