[v5.0.3][Web] decrypt incorrect

[zs-dima]

decrypt incorrect in case of Web release.
the same code decrypt correctly in the debug or encrypt v5.0.1

final key = Key.fromUtf8("key");
final initializationVector = IV.fromLength(16);
final encrypter = Encrypter(AES(key, mode: AESMode.cbc, padding: 'PKCS7'));
return encrypter.decrypt64(this, iv: initializationVector);

Flutter 3.16.4
encrypt v5.0.3

[tipu0710]

Facing same issue on web. I'm using encrypt: ^5.0.3. It was working well before. Here is my code.

final _encrypter = Encrypter(
   AES(Key.fromUtf8('key')),
 );
 static final _iv = IV.fromLength(16);
String encrypt(String value) {
   final encrypted = _encrypter.encrypt(value, iv: _iv);
   return encrypted.base64;
 }

String decrypt(String value) {
   var decrypt = _encrypter.decrypt64(value, iv: _iv);
   return decrypt;
 }

[ArslanKhan99]

Same issue encryption is also wrong as when going to decrypt it its give symbols in return

[ArslanKhan99]

THIS ID DECRYPTED Value. This is printing console as it was working fine earlier �����Pl��fY�#��~675

[ArslanKhan99]

It is encryption seems okay but its also wrong because when try to decrypt it on server side it gives the same decrypt show above "x1kNa/Tk0yH13GhvwmfRGirqGqBFxOt03zqWOf5A6WQ="

[wsk321]

I encountered this issue today, and after reverting to version 5.0.0, it no longer appeared. I hope the author can address this issue for versions post 5.0.0.

[ArslanKhan99]

the old version was not longer available I sort this issue like below

get version 5.0.1 directory from my pub cached.
update the project according to my project and use this as local dependency its worked now.

[yogithesymbian]

I think I misunderstood the documentation.

Finally, I solved it with the help of ChatGPT! After using this library since 2022, the same problem resurfaced in 2024. Now it's resolved. I’m using it on my mobile (Android), and I believe it will work on other specific devices as well. I used padding set to 'PKCS7'.

My issue(story) is that when the decryption has different lengths, it produces different ASCII symbols. 😅 Two years ago, I solved it by simply replacing everything ascii thats already known by debugging.

[log] data encryption : AjLQ/Htb7J/10101p2XXXXXXXXXXXXXXXqFS5fqkBdo=  // "I have censored this data."
[log] data result decryption : {"id": 100001, "XXXX_XXXX": 1}�����//  "I have censored this data."

The numbers below are IDs:
1-99 are safe.
100 contains random ASCII characters (weird characters: �).

101-999 are safe (solved by replacing all ASCII with empty strings).
1,000 contains random ASCII characters (• weird characters: �������).

1,001-9,999 are safe (solved by replacing all ASCII with empty strings).
10,000 contains random ASCII characters (• weird characters: �����).

10,001-99,999 are safe (solved by replacing all ASCII with empty strings).
100,000 contains random ASCII characters (• weird ASCII characters: �����).

100,001-999,999 are safe.

That means my system has encrypted/decrypted more than 100,000 pieces of data :D

Here’s an example for decryption my code :

final encrypter = aes.Encrypter(
        aes.AES(
          key,
          mode: aes.AESMode.cbc,
          padding: 'PKCS7', //  solved !!!
        ),
);

[Eznic]

Im Facing The Same Issue, And I Solve It By Doing this

final Key key = Key.fromUtf8("key");

// Replace The Old Line
// final IV iv = IV.fromLength(16);

// With This Line
final IV iv = IV(Uint8List(16));

final Encrypter encrypter = Encrypter(AES(key, mode: AESMode.cbc, padding: 'PKCS7'));
return encrypter.decrypt64(this, iv: iv);

[DucThu-Dev]

Im Facing The Same Issue, And I Solve It By Doing this

final Key key = Key.fromUtf8("key");

// Replace The Old Line
// final IV iv = IV.fromLength(16);

// With This Line
final IV iv = IV(Uint8List(16));

final Encrypter encrypter = Encrypter(AES(key, mode: AESMode.cbc, padding: 'PKCS7'));
return encrypter.decrypt64(this, iv: iv);

This work! Thank you so much