Alamantus
/
otp-generator
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Code Issues Releases Wiki Activity

Add error message if input pad is too short.

This commit is contained in:
Robbie Antenesse 2018-02-20 23:38:46 -07:00
parent 0be7c788c3
commit d7991bb56c
2 changed files with 18 additions and 6 deletions
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1
index.html
View File

@ -18,6 +18,7 @@
<textarea id="input"></textarea><br>
<strong>One-Time Pad</strong><br>
<textarea id="inputPad"></textarea><br>
<em id="inputError" style="color:red"></em>
<button id="encryptInput">Encrypt</button><br>
<br>
<strong>Encrypted Message</strong><br>

23
index.js
View File

@ -14,8 +14,12 @@ const generatePad = (length) => {
return pad;
}
const stripString = (string) => {
return string.replace(/[\s]+/g, '&').replace(/[^a-zA-Z0-9\&]/g, '$');
}
export const encrypt = (string, pad = null) => {
const strippedString = string.replace(/[\s]+/g, '&').replace(/[^a-zA-Z0-9\&]/g, '$');
const strippedString = stripString(string);
pad = pad ? pad : generatePad(strippedString.length);
return {
oneTimePad: pad,
@ -38,12 +42,19 @@ export const decrypt = (string, pad) => {
}
document.getElementById('encryptInput').onclick = () => {
const error = document.getElementById('inputError');
const input = document.getElementById('input').value;
const inputPad = document.getElementById('inputPad').value;
const pad = inputPad !== '' && inputPad.length >= input.length ? inputPad.split('') : null;
const encryption = encrypt(input, pad);
document.getElementById('inputPad').value = encryption.oneTimePad.join('');
document.getElementById('encrypted').innerHTML = encryption.encryptedMessage;
const inputPad = stripString(document.getElementById('inputPad').value).toUpperCase();
const pad = inputPad !== '' ? inputPad.split('') : null;
if (pad !== null && pad.length < input.length) {
document.getElementById('inputPad').value = pad.join('');
error.innerHTML = 'The pad must be at least as long as the input';
} else {
error.innerHTML = '';
const encryption = encrypt(input, pad);
document.getElementById('inputPad').value = encryption.oneTimePad.join('');
document.getElementById('encrypted').innerHTML = encryption.encryptedMessage;
}
}
document.getElementById('decryptInput').onclick = () => {