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Remove some useless statements and switches

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This commit is contained in:
Hugo Pointcheval 2020-12-17 22:07:35 +01:00
parent ae23afdc0b
commit 356e95e70a
1 changed files with 30 additions and 32 deletions
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52
lib/symmetric_crypto.dart
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@ -27,25 +27,15 @@ enum Cipher { AES }
class KeyGenerator {
/// Generate a secret key.
///
/// You can specify a `keySize`. Default is 256 bits.
/// You can specify a `keySize`. Default is **256 bits**.
/// It returns an `Uint8List`.
Future<Uint8List> secretKey({KeySize keySize}) async {
int size;
switch (keySize) {
case KeySize.bits128:
size = 128;
break;
case KeySize.bits192:
size = 192;
break;
case KeySize.bits256:
size = 256;
break;
default:
// Default size = 256 bits
size = 256;
break;
}
Future<Uint8List> secretKey({KeySize keySize = KeySize.bits256}) async {
Map<KeySize, int> availableSizes = {
KeySize.bits128: 128,
KeySize.bits192: 192,
KeySize.bits256: 256
};
int size = availableSizes[keySize];
Uint8List key;
try {
@ -62,17 +52,23 @@ class KeyGenerator {
///
/// `keyLength` is in Bytes.
/// It returns an `Uint8List`.
Future<Uint8List> pbkdf2(String password, String salt, {int keyLength: 32, int iteration: 10000, Digest digest: Digest.sha256}) async {
Future<Uint8List> pbkdf2(String password, String salt,
{int keyLength: 32,
int iteration: 10000,
Digest digest: Digest.sha256}) async {
Uint8List key;
String algo;
if (digest == Digest.sha1) algo = 'sha1';
if (digest == Digest.sha256) algo = 'sha256';
if (digest == Digest.sha512) algo = 'sha512';
Map<Digest, String> availableDigests = {
Digest.sha1: 'sha1',
Digest.sha256: 'sha256',
Digest.sha512: 'sha512',
};
String algo = availableDigests[digest];
try {
key = await NativeCrypto().pbkdf2( password, salt, keyLength: keyLength, iteration: iteration, algorithm: algo);
log(key.toString());
key = await NativeCrypto().pbkdf2(password, salt,
keyLength: keyLength, iteration: iteration, algorithm: algo);
log("PBKDF2 KEY LENGTH: ${key.length} | DIGEST: $algo", name: TAG_DEBUG);
} on PlatformException catch (e) {
log(e.message, name: TAG_ERROR);
@ -187,14 +183,16 @@ class AES {
/// And returns plain text data as `Uint8List`.
///
/// You can pass a different key.
Future<Uint8List> decrypt(List<Uint8List> encryptedPayload, {Uint8List key}) async {
Future<Uint8List> decrypt(List<Uint8List> encryptedPayload,
{Uint8List key}) async {
if (!this._isInitialized && key == null)
throw DecryptionException(
'Instance not initialized. You can pass a key directly in decrypt method.');
Uint8List decryptedPayload;
try {
decryptedPayload = await NativeCrypto().symDecrypt(encryptedPayload, key ?? this.key);
decryptedPayload =
await NativeCrypto().symDecrypt(encryptedPayload, key ?? this.key);
} on DecryptionException catch (e) {
log(e.message, name: TAG_ERROR);
throw e;