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‎.gitignore‎

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# https://dart.dev/guides/libraries/private-files
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# Created by `dart pub`
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.dart_tool/
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# Avoid committing pubspec.lock for library packages; see
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# https://dart.dev/guides/libraries/private-files#pubspeclock.
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pubspec.lock
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.DS_Store

‎.gitmodules‎

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[submodule "src/third_party/openssl"]
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path = src/third_party/openssl_repo
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url = https://github.com/openssl/openssl.git

‎CHANGELOG.md‎

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## 1.0.0
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- Initial version.

‎README.md‎

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<!--
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This README describes the package. If you publish this package to pub.dev,
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this README's contents appear on the landing page for your package.
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For information about how to write a good package README, see the guide for
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[writing package pages](https://dart.dev/tools/pub/writing-package-pages).
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For general information about developing packages, see the Dart guide for
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[creating packages](https://dart.dev/guides/libraries/create-packages)
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and the Flutter guide for
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[developing packages and plugins](https://flutter.dev/to/develop-packages).
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-->
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TODO: Put a short description of the package here that helps potential users
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know whether this package might be useful for them.
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## Features
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TODO: List what your package can do. Maybe include images, gifs, or videos.
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## Getting started
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TODO: List prerequisites and provide or point to information on how to
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start using the package.
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## Usage
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TODO: Include short and useful examples for package users. Add longer examples
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to `/example` folder.
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```dart
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const like = 'sample';
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```
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## Additional information
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TODO: Tell users more about the package: where to find more information, how to
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contribute to the package, how to file issues, what response they can expect
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from the package authors, and more.

‎analysis_options.yaml‎

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# This file configures the static analysis results for your project (errors,
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# warnings, and lints).
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#
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# This enables the 'recommended' set of lints from `package:lints`.
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# This set helps identify many issues that may lead to problems when running
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# or consuming Dart code, and enforces writing Dart using a single, idiomatic
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# style and format.
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#
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# If you want a smaller set of lints you can change this to specify
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# 'package:lints/core.yaml'. These are just the most critical lints
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# (the recommended set includes the core lints).
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# The core lints are also what is used by pub.dev for scoring packages.
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include: package:lints/recommended.yaml
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# Uncomment the following section to specify additional rules.
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# linter:
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# rules:
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# - camel_case_types
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# analyzer:
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# exclude:
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# - path/to/excluded/files/**
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# For more information about the core and recommended set of lints, see
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# https://dart.dev/go/core-lints
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# For additional information about configuring this file, see
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# https://dart.dev/guides/language/analysis-options

‎hooks/build.dart‎

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import 'package:code_assets/code_assets.dart';
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import 'package:hooks/hooks.dart';
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import 'package:logging/logging.dart';
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import 'package:native_toolchain_c/native_toolchain_c.dart';
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void main(List<String> args) async {
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await build(args, (input, output) async {
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if (input.config.buildCodeAssets == false) {
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// If code assets should not be built, skip the build.
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return;
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}
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final cBuilder = CBuilder.library(
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name: 'openssl3',
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assetName: 'src/third_party/openssl3.g.dart',
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sources: ['third_party/openssl/openssl3.c'],
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defines: {
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if (input.config.code.targetOS == OS.windows)
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// Ensure symbols are exported in dll.
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'SQLITE_API': '__declspec(dllexport)',
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},
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);
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await cBuilder.run(
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input: input,
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output: output,
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logger: Logger('')
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..level = Level.ALL
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..onRecord.listen((record) => print(record.message)),
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);
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});
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}

‎lib/openssl_dart.dart‎

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/// Support for doing something awesome.
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///
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/// More dartdocs go here.
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library;
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export 'src/openssl_dart_base.dart';
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// TODO: Export any libraries intended for clients of this package.

‎lib/src/openssl_dart_base.dart‎

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import 'dart:ffi' as ffi;
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import 'dart:typed_data';
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import 'package:ffi/ffi.dart';
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import 'third_party/openssl.g.dart' as openssl;
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class OpenSSL {
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static final OpenSSL _instance = OpenSSL._();
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factory OpenSSL() => _instance;
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OpenSSL._();
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Uint8List aesEncrypt(Uint8List plaintext, Uint8List key, Uint8List iv) {
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return _aes(plaintext, key, iv, encrypt: true);
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}
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Uint8List aesDecrypt(Uint8List ciphertext, Uint8List key, Uint8List iv) {
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return _aes(ciphertext, key, iv, encrypt: false);
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}
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Uint8List _aes(Uint8List input, Uint8List key, Uint8List iv, {required bool encrypt}) {
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if (key.length != 32) {
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throw ArgumentError.value(key.length, 'key', 'Key must be 32 bytes for AES-256-CBC');
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}
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if (iv.length != 16) {
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throw ArgumentError.value(iv.length, 'iv', 'IV must be 16 bytes for AES-256-CBC');
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}
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final ctx = openssl.EVP_CIPHER_CTX_new();
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if (ctx == ffi.nullptr) throw StateError('Failed to create EVP_CIPHER_CTX');
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final inPtr = malloc<ffi.Uint8>(input.isEmpty ? 1 : input.length);
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final keyPtr = malloc<ffi.Uint8>(key.length);
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final ivPtr = malloc<ffi.Uint8>(iv.length);
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final outPtr = malloc<ffi.Uint8>(input.length + openssl.EVP_MAX_BLOCK_LENGTH);
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final outLenPtr = malloc<ffi.Int>();
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try {
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inPtr.asTypedList(input.length).setAll(0, input);
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keyPtr.asTypedList(key.length).setAll(0, key);
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ivPtr.asTypedList(iv.length).setAll(0, iv);
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final initResult = encrypt
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? openssl.EVP_EncryptInit_ex(
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ctx,
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openssl.EVP_aes_256_cbc(),
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ffi.nullptr,
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keyPtr.cast<ffi.UnsignedChar>(),
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ivPtr.cast<ffi.UnsignedChar>(),
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)
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: openssl.EVP_DecryptInit_ex(
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ctx,
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openssl.EVP_aes_256_cbc(),
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ffi.nullptr,
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keyPtr.cast<ffi.UnsignedChar>(),
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ivPtr.cast<ffi.UnsignedChar>(),
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);
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_checkResult(initResult, 'init');
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final updateResult = encrypt
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? openssl.EVP_EncryptUpdate(
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ctx,
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outPtr.cast<ffi.UnsignedChar>(),
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outLenPtr,
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inPtr.cast<ffi.UnsignedChar>(),
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input.length,
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)
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: openssl.EVP_DecryptUpdate(
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ctx,
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outPtr.cast<ffi.UnsignedChar>(),
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outLenPtr,
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inPtr.cast<ffi.UnsignedChar>(),
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input.length,
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);
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_checkResult(updateResult, 'update');
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var outLen = outLenPtr.value;
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final finalResult = encrypt
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? openssl.EVP_EncryptFinal_ex(ctx, outPtr.elementAt(outLen).cast<ffi.UnsignedChar>(), outLenPtr)
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: openssl.EVP_DecryptFinal_ex(ctx, outPtr.elementAt(outLen).cast<ffi.UnsignedChar>(), outLenPtr);
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_checkResult(finalResult, 'final');
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outLen += outLenPtr.value;
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return Uint8List.fromList(outPtr.asTypedList(outLen));
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} finally {
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malloc.free(inPtr);
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malloc.free(keyPtr);
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malloc.free(ivPtr);
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malloc.free(outPtr);
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malloc.free(outLenPtr);
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openssl.EVP_CIPHER_CTX_free(ctx);
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}
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}
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void _checkResult(int result, String step) {
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if (result != 1) throw StateError('OpenSSL AES $step step failed, result: $result');
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}
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}

‎lib/src/third_party/openssl.g.dart‎

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// AUTO GENERATED FILE, DO NOT EDIT.
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//
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// Generated by `package:ffigen`.
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// ignore_for_file: type=lint, unused_import
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import 'dart:ffi' as ffi;
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@ffi.Native<
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ffi.Int Function(
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ffi.Pointer<evp_cipher_ctx_st>,
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ffi.Pointer<evp_cipher_st>,
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ffi.Pointer<engine_st>,
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ffi.Pointer<ffi.UnsignedChar>,
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ffi.Pointer<ffi.UnsignedChar>,
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)
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>()
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external int EVP_EncryptInit_ex(
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ffi.Pointer<evp_cipher_ctx_st> ctx,
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ffi.Pointer<evp_cipher_st> cipher,
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ffi.Pointer<engine_st> impl,
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ffi.Pointer<ffi.UnsignedChar> key,
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ffi.Pointer<ffi.UnsignedChar> iv,
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);
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@ffi.Native<
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ffi.Int Function(
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ffi.Pointer<evp_cipher_ctx_st>,
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ffi.Pointer<ffi.UnsignedChar>,
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ffi.Pointer<ffi.Int>,
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ffi.Pointer<ffi.UnsignedChar>,
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ffi.Int,
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)
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>()
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external int EVP_EncryptUpdate(
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ffi.Pointer<evp_cipher_ctx_st> ctx,
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ffi.Pointer<ffi.UnsignedChar> out,
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ffi.Pointer<ffi.Int> outl,
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ffi.Pointer<ffi.UnsignedChar> in$,
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int inl,
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);
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@ffi.Native<
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ffi.Int Function(
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ffi.Pointer<evp_cipher_ctx_st>,
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ffi.Pointer<ffi.UnsignedChar>,
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ffi.Pointer<ffi.Int>,
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)
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>()
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external int EVP_EncryptFinal_ex(
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ffi.Pointer<evp_cipher_ctx_st> ctx,
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ffi.Pointer<ffi.UnsignedChar> out,
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ffi.Pointer<ffi.Int> outl,
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);
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@ffi.Native<
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ffi.Int Function(
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ffi.Pointer<evp_cipher_ctx_st>,
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ffi.Pointer<evp_cipher_st>,
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ffi.Pointer<engine_st>,
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ffi.Pointer<ffi.UnsignedChar>,
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ffi.Pointer<ffi.UnsignedChar>,
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)
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>()
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external int EVP_DecryptInit_ex(
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ffi.Pointer<evp_cipher_ctx_st> ctx,
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ffi.Pointer<evp_cipher_st> cipher,
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ffi.Pointer<engine_st> impl,
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ffi.Pointer<ffi.UnsignedChar> key,
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ffi.Pointer<ffi.UnsignedChar> iv,
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);
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@ffi.Native<
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ffi.Int Function(
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ffi.Pointer<evp_cipher_ctx_st>,
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ffi.Pointer<ffi.UnsignedChar>,
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ffi.Pointer<ffi.Int>,
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ffi.Pointer<ffi.UnsignedChar>,
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ffi.Int,
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)
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>()
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external int EVP_DecryptUpdate(
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ffi.Pointer<evp_cipher_ctx_st> ctx,
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ffi.Pointer<ffi.UnsignedChar> out,
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ffi.Pointer<ffi.Int> outl,
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ffi.Pointer<ffi.UnsignedChar> in$,
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int inl,
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);
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@ffi.Native<
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ffi.Int Function(
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ffi.Pointer<evp_cipher_ctx_st>,
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ffi.Pointer<ffi.UnsignedChar>,
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ffi.Pointer<ffi.Int>,
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)
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>()
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external int EVP_DecryptFinal_ex(
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ffi.Pointer<evp_cipher_ctx_st> ctx,
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ffi.Pointer<ffi.UnsignedChar> outm,
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ffi.Pointer<ffi.Int> outl,
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);
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@ffi.Native<ffi.Pointer<evp_cipher_ctx_st> Function()>()
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external ffi.Pointer<evp_cipher_ctx_st> EVP_CIPHER_CTX_new();
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@ffi.Native<ffi.Void Function(ffi.Pointer<evp_cipher_ctx_st>)>()
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external void EVP_CIPHER_CTX_free(ffi.Pointer<evp_cipher_ctx_st> c);
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@ffi.Native<ffi.Pointer<evp_cipher_st> Function()>()
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external ffi.Pointer<evp_cipher_st> EVP_aes_256_cbc();
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final class evp_cipher_st extends ffi.Opaque {}
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final class evp_cipher_ctx_st extends ffi.Opaque {}
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final class engine_st extends ffi.Opaque {}
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const int EVP_MAX_BLOCK_LENGTH = 32;

‎pubspec.yaml‎

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name: openssl_dart
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description: A starting point for Dart libraries or applications.
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version: 1.0.0
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# repository: https://github.com/my_org/my_repo
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environment:
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sdk: ^3.10.1
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# Add regular dependencies here.
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dependencies:
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hooks: ^1.0.0
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code_assets: ^1.0.0
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native_toolchain_c: ^0.17.4
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logging: ^1.3.0
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ffi: ^2.1.5
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# path: ^1.9.0
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dev_dependencies:
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ffigen: ^20.1.1
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lints: ^6.0.0
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test: ^1.29.0

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