FLUTTER ECOSYSTEM

jerson/flutter-rsa

RSA for flutter made with golang for fast performance with support for android, ios, macos, linux, windows and web

flutter-rsa project cover
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92
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31
Last push (UTC)
Oct 25, 2025
Project status
Active
Gerson Alexander Pardo Gamez GitHub avatar
GITHUB User

Gerson Alexander Pardo Gamez ↗

Software Engineer: Go (Golang), Flutter and React Native

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Technical topics

Packages published by this repository

Dependencies used

Dependency list 9 items
  • flutter{"sdk":"flutter"}
  • flutter_web_plugins{"sdk":"flutter"}
  • ffi^2.1.3
  • flat_buffers^23.5.26
  • path^1.9.0
  • web>=0.5.0 <2.0.0
  • plugin_platform_interface^2.0.2
  • flutter_lintsDevelopment^5.0.0
  • flutter_testDevelopment{"sdk":"flutter"}

Original README

English project snapshot. Visit GitHub for the latest content.

Expand / collapse project README

Fast RSA

Library for use RSA with support for android, ios, macos, windows, linux and web

Integration Tests Android

Integration Tests Linux

Integration Tests Windows

Integration Tests iOS

Integration Tests macOS

Contents

Usage

Async Methods
Encrypt methods
import 'package:fast_rsa/fast_rsa.dart';

var result = await RSA.encryptOAEP(message, label, Hash.HASH_SHA256, publicKey)
var result = await RSA.encryptPKCS1v15(message, publicKey)

var result = await RSA.encryptOAEPBytes(messageBytes, label, Hash.SHA256, publicKey)
var result = await RSA.encryptPKCS1v15Bytes(messageBytes, publicKey)

Decrypt methods
import 'package:fast_rsa/fast_rsa.dart';

var result = await RSA.decryptOAEP(message, label, Hash.HASH_SHA256, privateKey)
var result = await RSA.decryptPKCS1v15(message, privateKey)

var result = await RSA.decryptOAEPBytes(messageBytes, label, Hash.SHA256, privateKey)
var result = await RSA.decryptPKCS1v15Bytes(messageBytes, privateKey)

Sign methods
import 'package:fast_rsa/fast_rsa.dart';

var result = await RSA.signPSS(message, Hash.SHA256, SaltLength.SALTLENGTH_AUTO, privateKey)
var result = await RSA.signPKCS1v15(message, Hash.SHA256, privateKey)

var result = await RSA.signPSSBytes(messageBytes, Hash.SHA256, SaltLength.SALTLENGTH_AUTO, privateKey)
var result = await RSA.signPKCS1v15Bytes(messageBytes, Hash.SHA256, privateKey)

Verify methods
import 'package:fast_rsa/fast_rsa.dart';

var result = await RSA.verifyPSS(signature, message, Hash.SHA256, SaltLength.SALTLENGTH_AUTO, publicKey)
var result = await RSA.verifyPKCS1v15(signature, message, Hash.SHA256, publicKey)

var result = await RSA.verifyPSSBytes(signatureBytes, messageBytes, Hash.SHA256, SaltLength.SALTLENGTH_AUTO, publicKey)
var result = await RSA.verifyPKCS1v15Bytes(signatureBytes, messageBytes, Hash.SHA256, publicKey)

Generate Methods
import 'package:fast_rsa/fast_rsa.dart';

var result = await RSA.generate(2048)

Convert Methods
import 'package:fast_rsa/fast_rsa.dart';

var result = await RSA.convertJWKToPrivateKey(data, keyId);
var result = await RSA.convertJWKToPublicKey(data, keyId);

var result = await RSA.convertKeyPairToPKCS12(privateKey, certificate, password);
var result = await RSA.convertPKCS12ToKeyPair(pkcs12, password);

var result = await RSA.convertPrivateKeyToPKCS8(privateKey);
var result = await RSA.convertPrivateKeyToPKCS1(privateKey);
var result = await RSA.convertPrivateKeyToJWK(privateKey);

var result = await RSA.convertPrivateKeyToPublicKey(privateKey);

var result = await RSA.convertPublicKeyToPKIX(publicKey);
var result = await RSA.convertPublicKeyToPKCS1(publicKey);
var result = await RSA.convertPublicKeyToJWK(publicKey);

var result = await RSA.encryptPrivateKey(privateKey, password, PEMCipher.PEMCIPHER_AES256);
var result = await RSA.decryptPrivateKey(privateKeyEncrypted, password);
Util Methods
import 'package:fast_rsa/fast_rsa.dart';

var result = await RSA.hash(message, Hash.SHA256);
var result = await RSA.base64(message);

Sync Methods
Encrypt methods
import 'package:fast_rsa/fast_rsa_sync.dart';

var result = RSASync.encryptOAEP(message, label, Hash.HASH_SHA256, publicKey);
var result = RSASync.encryptPKCS1v15(message, publicKey);

var result = RSASync.encryptOAEPBytes(messageBytes, label, Hash.SHA256, publicKey);
var result = RSASync.encryptPKCS1v15Bytes(messageBytes, publicKey);

Decrypt methods
import 'package:fast_rsa/fast_rsa_sync.dart';

var result = RSASync.decryptOAEP(message, label, Hash.HASH_SHA256, privateKey);
var result = RSASync.decryptPKCS1v15(message, privateKey);

var result = RSASync.decryptOAEPBytes(messageBytes, label, Hash.SHA256, privateKey);
var result = RSASync.decryptPKCS1v15Bytes(messageBytes, privateKey);

Sign methods
import 'package:fast_rsa/fast_rsa_sync.dart';

var result = RSASync.signPSS(message, Hash.SHA256, SaltLength.SALTLENGTH_AUTO, privateKey);
var result = RSASync.signPKCS1v15(message, Hash.SHA256, privateKey);

var result = RSASync.signPSSBytes(messageBytes, Hash.SHA256, SaltLength.SALTLENGTH_AUTO, privateKey);
var result = RSASync.signPKCS1v15Bytes(messageBytes, Hash.SHA256, privateKey);

Verify methods
import 'package:fast_rsa/fast_rsa_sync.dart';

var result = RSASync.verifyPSS(signature, message, Hash.SHA256, SaltLength.SALTLENGTH_AUTO, publicKey);
var result = RSASync.verifyPKCS1v15(signature, message, Hash.SHA256, publicKey);

var result = RSASync.verifyPSSBytes(signatureBytes, messageBytes, Hash.SHA256, SaltLength.SALTLENGTH_AUTO, publicKey);
var result = RSASync.verifyPKCS1v15Bytes(signatureBytes, messageBytes, Hash.SHA256, publicKey);

Generate Methods
import 'package:fast_rsa/fast_rsa_sync.dart';

var result = RSASync.generate(2048)

Convert Methods
import 'package:fast_rsa/fast_rsa_sync.dart';

var result = RSASync.convertJWKToPrivateKey(data, keyId);
var result = RSASync.convertJWKToPublicKey(data, keyId);

var result = RSASync.convertKeyPairToPKCS12(privateKey, certificate, password);
var result = RSASync.convertPKCS12ToKeyPair(pkcs12, password);

var result = RSASync.convertPrivateKeyToPKCS8(privateKey);
var result = RSASync.convertPrivateKeyToPKCS1(privateKey);
var result = RSASync.convertPrivateKeyToJWK(privateKey);

var result = RSASync.convertPrivateKeyToPublicKey(privateKey);

var result = RSASync.convertPublicKeyToPKIX(publicKey);
var result = RSASync.convertPublicKeyToPKCS1(publicKey);
var result = RSASync.convertPublicKeyToJWK(publicKey);

var result = RSASync.encryptPrivateKey(privateKey, password, PEMCipher.PEMCIPHER_AES256);
var result = RSASync.decryptPrivateKey(privateKeyEncrypted, password);
Util Methods
import 'package:fast_rsa/fast_rsa_sync.dart';

var result = RSASync.hash(message, Hash.SHA256);
var result = RSASync.base64(message);

Setup

Android

No additional setup required.

iOS

No additional setup required.

Web

add to you pubspec.yaml

assets:
  - packages/fast_rsa/web/assets/worker.js
  - packages/fast_rsa/web/assets/wasm_exec.js
  - packages/fast_rsa/web/assets/rsa.wasm

ref: https://github.com/jerson/flutter-rsa/blob/master/example/pubspec.yaml

MacOS

no additional setup required

Linux

No additional setup required.

Windows

No additional setup required.

Example

Inside example folder

cd example && flutter run

check our web demo: [https://flutter-rsa.jerson.dev/]

Native Code

the native library is made in Golang and build with gomobile for faster performance

https://github.com/jerson/rsa-mobile