Fix SSH public key validation (#5323)

Author: hzy46

src/webportal/src/app/user/fabric/user-profile/ssh-list-dialog.jsx

@@ -12,9 +12,23 @@ import {
   DialogFooter,
   TextField,
 } from 'office-ui-fabric-react';
+import sshpk from 'sshpk';
 
 import t from '../../../components/tachyons.scss';
 
+const validateSSHPublicKey = keyString => {
+  try {
+    const key = sshpk.parseKey(keyString, 'ssh');
+    if (sshpk.Key.isKey(key)) {
+      return true;
+    } else {
+      return false;
+    }
+  } catch (error) {
+    return false;
+  }
+};
+
 const SSHListDialog = ({ sshKeys, onDismiss, onAddPublickeys }) => {
   const [error, setError] = useState('');
   const [inputTitleError, setInputTitleError] = useState('');
@@ -37,13 +51,8 @@ const SSHListDialog = ({ sshKeys, onDismiss, onAddPublickeys }) => {
     } else {
       surefireTitle = true;
     }
-    if (
-      value.trim() === '' ||
-      !value.trim().match(/^ssh-rsa AAAA[0-9A-Za-z+/]+[=]{0,3}.*$/)
-    ) {
-      setInputValueError(
-        'Please input correct SSH Public key, it should be starting with ssh-rsa.',
-      );
+    if (value.trim() === '' || !validateSSHPublicKey(value.trim())) {
+      setInputValueError('Please input correct SSH Public key.');
     } else {
       surefireValue = true;
     }
@@ -81,7 +90,7 @@ const SSHListDialog = ({ sshKeys, onDismiss, onAddPublickeys }) => {
         <div>
           <div className={t.mt1}>
             <TextField
-              label='Title (Please give the SSH key a name):'
+              label='Title (Please give the SSH public key a name):'
               required={true}
               errorMessage={inputTitleError}
               onChange={e => {
@@ -93,7 +102,7 @@ const SSHListDialog = ({ sshKeys, onDismiss, onAddPublickeys }) => {
           </div>
           <div className={t.mt1}>
             <TextField
-              label='Value (SSH Public key, starts with ssh-rsa):'
+              label='SSH public key:'
               required={true}
               errorMessage={inputValueError}
               onChange={e => {