Last active
July 14, 2018 12:24
-
-
Save jeffotoni/be6a7441bd764cfdcb87766f55950a64 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<input type='file' accept='*' onchange='openFile(event)'><br> | |
<textarea id='output' rows=9 cols=35></textarea> | |
<script> | |
var openFile = function(event) { | |
var output = document.getElementById('output'); | |
var input = event.target; | |
var reader = new FileReader(); | |
reader.onload = function(){ | |
var dataText = reader.result; | |
output.value = dataText | |
encryptText(dataText, "senha1224"). | |
then(buffCry => { | |
console.log(buffCry); | |
output.value += "\n\ncrypt:\n" + ab2str(buffCry); | |
} , err => { | |
output.value += "\n\ncrypt:\n" + err | |
}); | |
}; | |
// reader.readAsArrayBuffer(input.files[0]); | |
reader.readAsBinaryString(input.files[0]); | |
}; | |
const encryptText = async (plainText, password) => { | |
const ptUtf8 = new TextEncoder().encode(plainText); | |
const pwUtf8 = new TextEncoder().encode(password); | |
const pwHash = await crypto.subtle.digest('SHA-256', pwUtf8); | |
const iv = crypto.getRandomValues(new Uint8Array(12)); | |
const alg = { name: 'AES-GCM', iv: iv }; | |
const key = await crypto.subtle.importKey('raw', pwHash, alg, false, ['encrypt']); | |
return crypto.subtle.encrypt(alg, key, ptUtf8); | |
} | |
function ab2str(buf) { | |
return String.fromCharCode.apply(null, new Uint8Array(buf)); | |
} | |
function str2ab(str) { | |
var buf = new ArrayBuffer(str.length*2); // 2 bytes for each char | |
var bufView = new Uint16Array(buf); | |
for (var i=0, strLen=str.length; i < strLen; i++) { | |
bufView[i] = str.charCodeAt(i); | |
} | |
return buf; | |
} | |
</script> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment