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feat: Also hash the file on encryption and decryption

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PapaTutuWawa
2022-10-05 15:05:43 +02:00
parent 35138e102e
commit 31f33a0413
6 changed files with 167 additions and 30 deletions
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23
packages/moxplatform_platform_interface/lib/src/crypto.dart
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@@ -16,17 +16,32 @@ extension CipherAlgorithmToIntExtension on CipherAlgorithm {
}
}
class CryptographyResult {
const CryptographyResult(this.plaintextHash, this.ciphertextHash);
final Uint8List plaintextHash;
final Uint8List ciphertextHash;
}
/// Wrapper around platform-native cryptography APIs
abstract class CryptographyImplementation {
/// Encrypt the file at [sourcePath] using [algorithm] and write the result back to
/// [destPath]. Note that this function runs off-thread as to not block the UI thread.
/// [destPath]. [hashSpec] is the name of the Hash function to use, i.e. "SHA-256".
/// Note that this function runs off-thread as to not block the UI thread.
///
/// Resolves to true if the encryption was successful. Resolves to fale on failure.
Future<bool> encryptFile(String sourcePath, String destPath, Uint8List key, Uint8List iv, CipherAlgorithm algorithm);
Future<CryptographyResult?> encryptFile(String sourcePath, String destPath, Uint8List key, Uint8List iv, CipherAlgorithm algorithm, String hashSpec);
/// Decrypt the file at [sourcePath] using [algorithm] and write the result back to
/// [destPath]. Note that this function runs off-thread as to not block the UI thread.
/// [destPath]. [hashSpec] is the name of the Hash function to use, i.e. "SHA-256".
/// Note that this function runs off-thread as to not block the UI thread.
///
/// Resolves to true if the encryption was successful. Resolves to fale on failure.
Future<bool> decryptFile(String sourcePath, String destPath, Uint8List key, Uint8List iv, CipherAlgorithm algorithm);
Future<CryptographyResult?> decryptFile(String sourcePath, String destPath, Uint8List key, Uint8List iv, CipherAlgorithm algorithm, String hashSpec);
/// Hashes the file at [path] using the Hash function with name [hashSpec].
/// Note that this function runs off-thread as to not block the UI thread.
///
/// Returns the hash of the file.
Future<Uint8List?> hashFile(String path, String hashSpec);
}

13
packages/moxplatform_platform_interface/lib/src/crypto_stub.dart
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@@ -3,12 +3,17 @@ import 'package:moxplatform_platform_interface/src/crypto.dart';
class StubCryptographyImplementation extends CryptographyImplementation {
@override
Future<bool> encryptFile(String sourcePath, String destPath, Uint8List key, Uint8List iv, CipherAlgorithm algorithm) async {
return false;
Future<CryptographyResult?> encryptFile(String sourcePath, String destPath, Uint8List key, Uint8List iv, CipherAlgorithm algorithm, String hashSpec) async {
return null;
}
@override
Future<bool> decryptFile(String sourcePath, String destPath, Uint8List key, Uint8List iv, CipherAlgorithm algorithm) async {
return false;
Future<CryptographyResult?> decryptFile(String sourcePath, String destPath, Uint8List key, Uint8List iv, CipherAlgorithm algorithm, String hashSpec) async {
return null;
}
@override
Future<Uint8List?> hashFile(String path, String hashSpec) async {
return null;
}
}