Stack Overflow
Stack Overflow

Questions tagged [pointycastle]

pointycastle is a Dart package for common cryptographic operations. Most of the classes are ports of Bouncy Castle from Java to Dart.

27 questions
5
votes
1 answer

Input data length must be a multiple of cipher's block size in AES CTR

I encrypt a string using Dart's encrypt package. The code I encrypted is below. String encrypt(String kelime) { final key = Key.fromUtf8('H4WtkvK4qyehIe2kjQfH7we1xIHFK67e'); //32 length final iv = IV.fromUtf8('HgNRbGHbDSz9T0CC'); final…
Stick
  • 154
  • 1
  • 8
3
votes
0 answers

Dart: PointyCastle export Diffie-Hellman keys to PEM

I'm trying to export Diffie-Hellman(modular version) keys to PEM format, using PointyCastle, since it offers ASN1 serialization/deserialization. This is my method for the conversion (for DhPublicKey): Uint8List toSpki() { ASN1Sequence outer =…
mrpurpleknight
  • 31
  • 3
3
votes
3 answers

Compatible AES encryption and decryption for Flutter and javascript

I am trying to write two functions in flutter and Javascript which I can use throughout my project to encrypt or decrypt data using AES when data is exchanged. For Flutter, I am using the pointycastle package based on…
Nguyen Phạm
  • 45
  • 1
  • 2
  • 7
2
votes
0 answers

PointyCastle seems very slow compared to another AES software implemented package

I had another question posted at Throughput for PointyCastle's aes cbc? but I don't consider this a duplicate. I am trying to encrypt files using AES-CBC in flutter and came across the PointyCastle and Cryptography packages. Both appear to be…
mirkaim
  • 145
  • 1
  • 10
2
votes
0 answers

SHA-384/PSS Signature verification using PointyCastle in Dart

I have a public key, a message and a signature. I want to verify that the signature is correct using SHA-384/PSS signer from PointyCastle. I managed to build something but the signature verification fails and I suppose it is because of salt…
Gyuri Majercsik
  • 2,141
  • 1
  • 17
  • 29
2
votes
1 answer

How to encrypt and decrypt using AES CBC 256bit and PKCS5Padding in dart and also retrieve parameters

I have some java code which I am trying to replicate in Dart (class can be found at here) /** * Encrypt object with password * @param data Object to be encrypted * @param secret Password to use for encryption * @return…
Fern
  • 93
  • 6
  • 16
1
vote
1 answer

"crypto/rsa: decryption error" when trying to use rsa encryption and decryption in dart (pointycastle) and golang

I'm trying to encrypt a message in dart (using pointycastle) and decrypt it in golang (using the standard library). The private and public keys do match. The message is sent over TCP. dart code: // import 'package:encrypt/encrypt.dart' as enc; final…
Vandermondium
  • 11
  • 3
1
vote
1 answer

Dart: Encrypt and decrypt in AES with PointyCastle plug-in

I am trying to perform encryption and decryption using the plug-in that I will show you below. The decryption works perfectly for me as I have used an AES cipher from my backend and it converts it perfectly. The problem is the following: When you…
DomingoMG
  • 1,827
  • 2
  • 23
  • 44
1
vote
2 answers

Uint64List not supported on flutter web

i have an error with Uint64List in flutter Web (in pointycastle lib) var length = Uint8List.view((Uint64List(2)..[0] = iv.length * 8).buffer); "Error: Unsupported operation: Uint64List not supported on the…
redDwarf
  • 336
  • 1
  • 9
1
vote
2 answers

how to convert AsymmetricKeyPair to base64 encoding string in dart

I‘m a rookie in PointyCastle,how can I generate ecc base64 key pairs with PointyCastle in dart AsymmetricKeyPair generateKeyPair({curve = 'secp256r1'}) { var param = curve == 'secp256r1' ? ECCurve_secp256r1() :…
John
  • 645
  • 1
  • 8
  • 23
1
vote
1 answer

Encryption in Flutter and Decryption in java (AES-256)

I am trying to implement encryption in Flutter, I'm using java as a backend and dart for the mobile application. I have taken code from this Encryption in Java and Decryption in Flutter (AES-256) But it only supplies decryption in Flutter, and I…
yong ho
  • 3,892
  • 9
  • 40
  • 81
1
vote
1 answer

How to import randomly generated 4096bit Java RSA public key from String

I have a network app that I'm trying to use with Java and Flutter and encryption. I'm using a 4096 bit RSA randomly generated keypair in Java and I'm using it to encrypt a randomly generated AES 256 bit key I only need the Dart code as the Java code…
Fern
  • 93
  • 6
  • 16
1
vote
1 answer

Get RSA Public or Private Key from KeyPair Generation Flutter

I have added pointycastle and generated a keypair, encrypting the trial "Hello World" string. From this, I want to get the values of the Private and Public Key. Is there anywhere they are stored, because whenever I try to print the values of…
Epic Gamer_1
  • 104
  • 3
  • 12
1
vote
1 answer

Encrypting binary array with AES ECB in Dart

I'm looking for a way to encrypt a binary array in Dart. I've had a look at some of the more common libraries such as https://pub.dartlang.org/packages/encrypt, but many of them can only handle AES keys and data in String form, not binary arrays.…
heinz_dieter
  • 315
  • 1
  • 4
  • 12
0
votes
0 answers

Throughput for PointyCastle's aes cbc?

I'm trying to encrypt files with the PointyCastle package for flutter. I don't see any information anywhere for throughput benchmarks but when testing a 100mb file, it is taking about 10 seconds which seems very high compared to another flutter aes…
mirkaim
  • 145
  • 1
  • 10
1
2