tls: fix inconsistent (hostname vs host)

Updated error messages and function arguments
Refs: nodejs#20892

lib/tls.js

@@ -86,15 +86,15 @@ exports.convertALPNProtocols = function(protocols, out) {
   }
 };
 
-function unfqdn(host) {
-  return host.replace(/[.]$/, '');
+function unfqdn(hostname) {
+  return hostname.replace(/[.]$/, '');
 }
 
-function splitHost(host) {
+function splitHost(hostname) {
   // String#toLowerCase() is locale-sensitive so we use
   // a conservative version that only lowercases A-Z.
   const replacer = (c) => String.fromCharCode(32 + c.charCodeAt(0));
-  return unfqdn(host).replace(/[A-Z]/g, replacer).split('.');
+  return unfqdn(hostname).replace(/[A-Z]/g, replacer).split('.');
 }
 
 function check(hostParts, pattern, wildcards) {
@@ -221,12 +221,12 @@ exports.checkServerIdentity = function checkServerIdentity(hostname, cert) {
         valid = wildcard(cn);
 
       if (!valid)
-        reason = `Host: ${hostname}. is not cert's CN: ${cn}`;
+        reason = `Hostname: ${hostname} is not cert's CN: ${cn}`;
     } else {
       valid = dnsNames.some(wildcard) || uriNames.some(noWildcard);
       if (!valid)
         reason =
-          `Host: ${hostname}. is not in the cert's altnames: ${altNames}`;
+          `Hostname: ${hostname} is not in the cert's altnames: ${altNames}`;
     }
   } else {
     reason = 'Cert is empty';

test/parallel/test-tls-check-server-identity.js

@@ -42,17 +42,17 @@ const tests = [
   {
     host: false,
     cert: { subject: { CN: 'a.com' } },
-    error: 'Host: false. is not cert\'s CN: a.com'
+    error: 'Hostname: false is not cert\'s CN: a.com'
   },
   {
     host: null,
     cert: { subject: { CN: 'a.com' } },
-    error: 'Host: null. is not cert\'s CN: a.com'
+    error: 'Hostname: null is not cert\'s CN: a.com'
   },
   {
     host: undefined,
     cert: { subject: { CN: 'a.com' } },
-    error: 'Host: undefined. is not cert\'s CN: a.com'
+    error: 'Hostname: undefined is not cert\'s CN: a.com'
   },
 
   // Basic CN handling
@@ -61,37 +61,37 @@ const tests = [
   {
     host: 'a.com',
     cert: { subject: { CN: 'b.com' } },
-    error: 'Host: a.com. is not cert\'s CN: b.com'
+    error: 'Hostname: a.com is not cert\'s CN: b.com'
   },
   { host: 'a.com', cert: { subject: { CN: 'a.com.' } } },
   {
     host: 'a.com',
     cert: { subject: { CN: '.a.com' } },
-    error: 'Host: a.com. is not cert\'s CN: .a.com'
+    error: 'Hostname: a.com is not cert\'s CN: .a.com'
   },
 
   // Wildcards in CN
   { host: 'b.a.com', cert: { subject: { CN: '*.a.com' } } },
   {
     host: 'ba.com',
     cert: { subject: { CN: '*.a.com' } },
-    error: 'Host: ba.com. is not cert\'s CN: *.a.com'
+    error: 'Hostname: ba.com is not cert\'s CN: *.a.com'
   },
   {
     host: '\n.b.com',
     cert: { subject: { CN: '*n.b.com' } },
-    error: 'Host: \n.b.com. is not cert\'s CN: *n.b.com'
+    error: 'Hostname: \n.b.com is not cert\'s CN: *n.b.com'
   },
   { host: 'b.a.com', cert: {
     subjectaltname: 'DNS:omg.com',
     subject: { CN: '*.a.com' } },
-    error: 'Host: b.a.com. is not in the cert\'s altnames: ' +
+    error: 'Hostname: b.a.com is not in the cert\'s altnames: ' +
            'DNS:omg.com'
   },
   {
     host: 'b.a.com',
     cert: { subject: { CN: 'b*b.a.com' } },
-    error: 'Host: b.a.com. is not cert\'s CN: b*b.a.com'
+    error: 'Hostname: b.a.com is not cert\'s CN: b*b.a.com'
   },
 
   // Empty Cert
@@ -114,15 +114,15 @@ const tests = [
       subjectaltname: 'DNS:*',
       subject: { CN: 'b.com' }
     },
-    error: 'Host: a.com. is not in the cert\'s altnames: ' +
+    error: 'Hostname: a.com is not in the cert\'s altnames: ' +
            'DNS:*'
   },
   {
     host: 'a.com', cert: {
       subjectaltname: 'DNS:*.com',
       subject: { CN: 'b.com' }
     },
-    error: 'Host: a.com. is not in the cert\'s altnames: ' +
+    error: 'Hostname: a.com is not in the cert\'s altnames: ' +
            'DNS:*.com'
   },
   {
@@ -136,15 +136,15 @@ const tests = [
       subjectaltname: 'DNS:*.a.com',
       subject: { CN: 'a.com' }
     },
-    error: 'Host: a.com. is not in the cert\'s altnames: ' +
+    error: 'Hostname: a.com is not in the cert\'s altnames: ' +
            'DNS:*.a.com'
   },
   {
     host: 'a.com', cert: {
       subjectaltname: 'DNS:*.a.com',
       subject: { CN: 'b.com' }
     },
-    error: 'Host: a.com. is not in the cert\'s altnames: ' +
+    error: 'Hostname: a.com is not in the cert\'s altnames: ' +
            'DNS:*.a.com'
   },
   {
@@ -166,7 +166,7 @@ const tests = [
       subjectaltname: 'DNS:*.a.com',
       subject: {}
     },
-    error: 'Host: a.com. is not in the cert\'s altnames: ' +
+    error: 'Hostname: a.com is not in the cert\'s altnames: ' +
            'DNS:*.a.com'
   },
   {
@@ -180,7 +180,7 @@ const tests = [
       subjectaltname: 'DNS:*.a.com',
       subject: {}
     },
-    error: 'Host: c.b.a.com. is not in the cert\'s altnames: ' +
+    error: 'Hostname: c.b.a.com is not in the cert\'s altnames: ' +
            'DNS:*.a.com'
   },
   {
@@ -200,7 +200,7 @@ const tests = [
       subjectaltname: 'DNS:*b.a.com',
       subject: {}
     },
-    error: 'Host: a.b.a.com. is not in the cert\'s altnames: ' +
+    error: 'Hostname: a.b.a.com is not in the cert\'s altnames: ' +
            'DNS:*b.a.com'
   },
   // Multiple DNS names
@@ -222,7 +222,7 @@ const tests = [
       subjectaltname: 'URI:http://*.b.a.com/',
       subject: {}
     },
-    error: 'Host: a.b.a.com. is not in the cert\'s altnames: ' +
+    error: 'Hostname: a.b.a.com is not in the cert\'s altnames: ' +
            'URI:http://*.b.a.com/'
   },
   // Invalid URI
@@ -238,7 +238,7 @@ const tests = [
       subjectaltname: 'IP Address:127.0.0.1',
       subject: {}
     },
-    error: 'Host: a.b.a.com. is not in the cert\'s altnames: ' +
+    error: 'Hostname: a.b.a.com is not in the cert\'s altnames: ' +
            'IP Address:127.0.0.1'
   },
   {
@@ -267,7 +267,7 @@ const tests = [
       subjectaltname: 'DNS:a.com',
       subject: { CN: 'localhost' }
     },
-    error: 'Host: localhost. is not in the cert\'s altnames: ' +
+    error: 'Hostname: localhost is not in the cert\'s altnames: ' +
            'DNS:a.com'
   },
   // IDNA
@@ -281,7 +281,7 @@ const tests = [
   {
     host: 'xn--bcher-kva.example.com',
     cert: { subject: { CN: 'xn--*.example.com' } },
-    error: 'Host: xn--bcher-kva.example.com. is not cert\'s CN: ' +
+    error: 'Hostname: xn--bcher-kva.example.com is not cert\'s CN: ' +
             'xn--*.example.com',
   },
 ];