test: improve test readability

by moving key and cert as files to fixtures

test/fixtures/keys/selfsigned-no-keycertsign/README.md

@@ -0,0 +1,2 @@
+# Self-signed certificate without keyCertSign bit
+The self-signed certificate ([cert.pem](./cert.pem)) and the key ([key.pem](./key.pem)) in this folder are used by the test [test-https-selfsigned-no-keycertsign-no-crash](../../../parallel/test-https-selfsigned-no-keycertsign-no-crash.js). The config ([cert.conf](./cert.conf)) and the file used to generate key and certificate in this folder ([https-renew-cert.sh](./https_renew_cert.sh)) are not used by the test but for reference.

test/fixtures/keys/selfsigned-no-keycertsign/cert.conf

@@ -0,0 +1,17 @@
+[req]
+distinguished_name = req_distinguished_name
+req_extensions = v3_req
+prompt = no
+
+[req_distinguished_name]
+C = DE
+CN = localhost
+
+[v3_req]
+keyUsage = digitalSignature, keyEncipherment
+extendedKeyUsage = serverAuth
+subjectAltName = @alt_names
+[alt_names]
+DNS.1 = 127.0.0.1
+DNS.2 = localhost
+IP.1 = 127.0.0.1

test/fixtures/keys/selfsigned-no-keycertsign/cert.pem

@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----
+MIIC9jCCAd6gAwIBAgIJANHflGRpZM1IMA0GCSqGSIb3DQEBCwUAMBQxEjAQBgNV
+BAMMCWxvY2FsaG9zdDAeFw0yMTAzMTUwOTEzMjdaFw0yMjAzMTUwOTEzMjdaMBQx
+EjAQBgNVBAMMCWxvY2FsaG9zdDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoC
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+ANpjy/orrVkqXriAbI/1xvBMInWdcMpXNeiOkxQeQdy8TLBk0ZViSJnf
+-----END CERTIFICATE-----

test/fixtures/keys/selfsigned-no-keycertsign/https_renew_cert.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+openssl genrsa -out rsa.pem 2048
+openssl rsa -in rsa.pem -out key.pem
+openssl req -sha256 -new -key key.pem -out csr.pem -subj "/CN=localhost"
+openssl x509 -req -extfile cert.conf -extensions v3_req -days 365 -in csr.pem -signkey key.pem -out cert.pem
+

test/fixtures/keys/selfsigned-no-keycertsign/key.pem

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIEogIBAAKCAQEA0y3pMvD2AjG5xGBkGfyjBq8QgwB13ExOOQeJHuMZ9oGu+9VM
+HzKawiLPD9ApMA2a7avcQ6p5H0e3bkpkUrE4oIMx3dooeG3fwcidcgXoJB7xzk/T
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+PetHcWtbU0Cl8blShaSwpxyCI01x3tUPw/b7tXMan/ImzjUgRe7kQXh2sf39V3b/
+fvzKXWBvOvc1lgG0pFgI/2xtGQQGTe74MzX5xFgw6eadRUnJeKI=
+-----END RSA PRIVATE KEY-----

test/parallel/test-https-selfsigned-no-keycertsign-no-crash.js

@@ -1,5 +1,6 @@
 'use strict';
 const common = require('../common');
+const fixtures = require('../common/fixtures');
 
 // This test starts an https server and tries
 // to connect to it using a self-signed certificate.
@@ -20,53 +21,13 @@ if (crypto.constants.OPENSSL_VERSION_NUMBER < minOpenSSL)
   common.skip('OpenSSL < 1.1.1h');
 
 const https = require('https');
+const path = require('path');
 
-const key = `-----BEGIN RSA PRIVATE KEY-----
-MIIEogIBAAKCAQEA0y3pMvD2AjG5xGBkGfyjBq8QgwB13ExOOQeJHuMZ9oGu+9VM
-HzKawiLPD9ApMA2a7avcQ6p5H0e3bkpkUrE4oIMx3dooeG3fwcidcgXoJB7xzk/T
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-fvzKXWBvOvc1lgG0pFgI/2xtGQQGTe74MzX5xFgw6eadRUnJeKI=
------END RSA PRIVATE KEY-----`;
+const key =
+  fixtures.readKey(path.join('selfsigned-no-keycertsign', 'key.pem'));
 
-const cert = `-----BEGIN CERTIFICATE-----
-MIIC9jCCAd6gAwIBAgIJANHflGRpZM1IMA0GCSqGSIb3DQEBCwUAMBQxEjAQBgNV
-BAMMCWxvY2FsaG9zdDAeFw0yMTAzMTUwOTEzMjdaFw0yMjAzMTUwOTEzMjdaMBQx
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-ANpjy/orrVkqXriAbI/1xvBMInWdcMpXNeiOkxQeQdy8TLBk0ZViSJnf
------END CERTIFICATE-----`;
+const cert =
+  fixtures.readKey(path.join('selfsigned-no-keycertsign', 'cert.pem'));
 
 const serverOptions = {
   key: key,