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crypto.dart
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crypto.dart
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import 'dart:convert'; // for the `utf8.encode` method
import 'package:crypto/crypto.dart';
import 'package:flutter/material.dart';
class MyCrypto extends StatefulWidget {
const MyCrypto({Key? key}) : super(key: key);
@override
State<MyCrypto> createState() => _MyCryptoState();
}
class _MyCryptoState extends State<MyCrypto> {
final TextEditingController _textEditingController = TextEditingController();
TextStyle textStyle = const TextStyle(
fontSize: 16,
fontWeight: FontWeight.bold,
);
String sha1Output = '';
String sha224Output = '';
String sha256Output = '';
String sha384Output = '';
String sha512Output = '';
String sha512224Output = '';
String sha512256Output = '';
String md5Output = '';
String hmacOutput = '';
@override
void initState() {
/// This is the `event listeners` of the TextEditingControllers
/// implemented using the [addListener] method
///
_textEditingController.addListener(_sha1Converter);
_textEditingController.addListener(_sha224Converter);
_textEditingController.addListener(_sha256Converter);
_textEditingController.addListener(_sha384Converter);
_textEditingController.addListener(_sha512Converter);
_textEditingController.addListener(_sha512224Converter);
_textEditingController.addListener(_sha512256Converter);
_textEditingController.addListener(_md5Converter);
_textEditingController.addListener(_hmacConverter);
super.initState();
}
@override
void dispose() {
super.dispose();
_textEditingController.dispose();
_textEditingController.removeListener(_sha1Converter);
_textEditingController.removeListener(_sha224Converter);
_textEditingController.removeListener(_sha256Converter);
_textEditingController.removeListener(_sha384Converter);
_textEditingController.removeListener(_sha512Converter);
_textEditingController.removeListener(_sha512224Converter);
_textEditingController.removeListener(_sha512256Converter);
_textEditingController.removeListener(_md5Converter);
_textEditingController.removeListener(_hmacConverter);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: const Text('Crypto')),
body: Padding(
padding: const EdgeInsets.all(10.0),
child: SingleChildScrollView(
controller: null,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const SizedBox(height: 10),
TextFormField(
controller: _textEditingController,
decoration: const InputDecoration(
labelText: 'Enter Your Text',
border: OutlineInputBorder(),
prefixIcon: Icon(Icons.tag),
),
),
const SizedBox(height: 20),
const Divider(thickness: 1, color: Colors.deepPurple),
Text('SHA-1:', style: textStyle),
Text('$sha1Output\n'),
const Divider(thickness: 1, color: Colors.deepPurple),
Text('SHA-224:', style: textStyle),
Text('$sha224Output\n'),
const Divider(thickness: 1, color: Colors.deepPurple),
Text('SHA-256', style: textStyle),
Text('$sha256Output\n'),
const Divider(thickness: 1, color: Colors.deepPurple),
Text('SHA-384:', style: textStyle),
Text('$sha384Output\n'),
const Divider(thickness: 1, color: Colors.deepPurple),
Text('SHA-512:', style: textStyle),
Text('$sha512Output\n'),
const Divider(thickness: 1, color: Colors.deepPurple),
Text('SHA-512/224:', style: textStyle),
Text('$sha512224Output\n'),
const Divider(thickness: 1, color: Colors.deepPurple),
Text('SHA-512/256:', style: textStyle),
Text('$sha512256Output\n'),
const Divider(thickness: 1, color: Colors.deepPurple),
Text('MD5: (Not Recommended)', style: textStyle),
Text('$md5Output\n'),
const Divider(thickness: 1, color: Colors.deepPurple),
Text('HMAC: (Most Secured)', style: textStyle),
Text('$hmacOutput\n'),
const Divider(thickness: 1, color: Colors.deepPurple),
],
),
),
),
);
}
_sha1Converter() {
// FIRST ENCODE TO UTF8 FORMAT
var bytes = utf8.encode(_textEditingController.text);
// AFTER ENCODING TO UTF-8 FORMAT IT WILL CONVERT TO SHA FORMAT
var digest = sha1.convert(bytes);
setState(() {
sha1Output = digest.toString();
});
}
_sha224Converter() {
var bytes = utf8.encode(_textEditingController.text);
var digest = sha224.convert(bytes);
setState(() {
sha224Output = digest.toString();
});
}
_sha256Converter() {
var bytes = utf8.encode(_textEditingController.text);
var digest = sha224.convert(bytes);
setState(() {
sha256Output = digest.toString();
});
}
_sha384Converter() {
var bytes = utf8.encode(_textEditingController.text);
var digest = sha224.convert(bytes);
setState(() {
sha384Output = digest.toString();
});
}
_sha512Converter() {
var bytes = utf8.encode(_textEditingController.text);
var digest = sha224.convert(bytes);
setState(() {
sha512Output = digest.toString();
});
}
_sha512224Converter() {
var bytes = utf8.encode(_textEditingController.text);
var digest = sha512224.convert(bytes);
setState(() {
sha512224Output = digest.toString();
});
}
_sha512256Converter() {
var bytes = utf8.encode(_textEditingController.text);
var digest = sha512256.convert(bytes);
setState(() {
sha512256Output = digest.toString();
});
}
_md5Converter() {
var bytes = utf8.encode(_textEditingController.text);
var digest = md5.convert(bytes);
setState(() {
md5Output = digest.toString();
});
}
_hmacConverter() {
var key = utf8.encode('p@ssw0rd'); //secret key being used
var bytes = utf8.encode(_textEditingController.text);
var hmacSha256 = Hmac(sha256, key); // HMAC-SHA256
var digest = hmacSha256.convert(bytes);
setState(() {
hmacOutput = digest.toString();
});
}
}