flutter/dart_jsonwebtoken
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v1.1.0

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Jonas Roussel
2020-08-28 15:03:22 +02:00
parent ad5bd22443
commit 91f7776fd6
4 changed files with 64 additions and 12 deletions
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64
lib/src/algorithms.dart
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@ -7,15 +7,27 @@ import 'package:pointycastle/pointycastle.dart' hide PrivateKey, PublicKey;
import 'package:rsa_pkcs/rsa_pkcs.dart' hide RSAPrivateKey, RSAPublicKey;
abstract class JWTAlgorithm {
static const HS256 = HS256Algorithm();
static const RS256 = RS256Algorithm();
static const HS256 = HMACAlgorithm('HS256');
static const HS384 = HMACAlgorithm('HS384');
static const HS512 = HMACAlgorithm('HS512');
static const RS256 = RSAAlgorithm('RS256');
static const RS384 = RSAAlgorithm('RS384');
static const RS512 = RSAAlgorithm('RS512');
static JWTAlgorithm fromName(String name) {
switch (name) {
case 'HS256':
return JWTAlgorithm.HS256;
case 'HS384':
return JWTAlgorithm.HS384;
case 'HS512':
return JWTAlgorithm.HS512;
case 'RS256':
return JWTAlgorithm.RS256;
case 'RS384':
return JWTAlgorithm.RS384;
case 'RS512':
return JWTAlgorithm.RS512;
default:
throw JWTInvalidError('unknown algorithm');
}
@ -28,18 +40,20 @@ abstract class JWTAlgorithm {
bool verify(Key key, List<int> body, List<int> signature);
}
class HS256Algorithm extends JWTAlgorithm {
const HS256Algorithm();
class HMACAlgorithm extends JWTAlgorithm {
final String _name;
const HMACAlgorithm(this._name);
@override
String get name => 'HS256';
String get name => _name;
@override
List<int> sign(Key key, List<int> body) {
assert(key is SecretKey, 'key must be a SecretKey');
final secretKey = key as SecretKey;
final hmac = Hmac(sha256, utf8.encode(secretKey.key));
final hmac = Hmac(_getHash(name), utf8.encode(secretKey.key));
return hmac.convert(body).bytes;
}
@ -57,13 +71,28 @@ class HS256Algorithm extends JWTAlgorithm {
return true;
}
Hash _getHash(String name) {
switch (name) {
case 'HS256':
return sha256;
case 'HS384':
return sha384;
case 'HS512':
return sha512;
default:
throw ArgumentError.value(name, 'name', 'unknown hash name');
}
}
}
class RS256Algorithm extends JWTAlgorithm {
const RS256Algorithm();
class RSAAlgorithm extends JWTAlgorithm {
final String _name;
const RSAAlgorithm(this._name);
@override
String get name => 'RS256';
String get name => _name;
@override
List<int> sign(Key key, List<int> body) {
@ -78,7 +107,7 @@ class RS256Algorithm extends JWTAlgorithm {
throw JWTInvalidError('invalid private RSA key');
}
final signer = Signer('SHA-256/RSA');
final signer = Signer('${_getHash(name)}/RSA');
final params = ParametersWithRandom(
PrivateKeyParameter<RSAPrivateKey>(
RSAPrivateKey(
@ -114,7 +143,7 @@ class RS256Algorithm extends JWTAlgorithm {
}
try {
final signer = Signer('SHA-256/RSA');
final signer = Signer('${_getHash(name)}/RSA');
final params = ParametersWithRandom(
PublicKeyParameter<RSAPublicKey>(
RSAPublicKey(
@ -132,4 +161,17 @@ class RS256Algorithm extends JWTAlgorithm {
return false;
}
}
String _getHash(String name) {
switch (name) {
case 'RS256':
return 'SHA-256';
case 'RS384':
return 'SHA-384';
case 'RS512':
return 'SHA-512';
default:
throw ArgumentError.value(name, 'name', 'unknown hash name');
}
}
}