updated X509Certificate class

flutter_inappwebview.iml

@@ -26,6 +26,7 @@
       <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_inappwebview/example/.dart_tool" />
       <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_inappwebview/example/.pub" />
       <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_inappwebview/example/build" />
+      <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_inappwebview/example/ios/Flutter/App.framework/flutter_assets/packages" />
       <excludeFolder url="file://$MODULE_DIR$/flutter_inappbrowser_tests/.dart_tool" />
       <excludeFolder url="file://$MODULE_DIR$/flutter_inappbrowser_tests/.pub" />
       <excludeFolder url="file://$MODULE_DIR$/flutter_inappbrowser_tests/build" />

lib/src/X509Certificate/asn1_object.dart

@@ -25,6 +25,20 @@ class ASN1Object {
     return null;
   }
 
+  ASN1Object firstSub() {
+    if (subCount() > 0) {
+      return sub.first;
+    }
+    return null;
+  }
+
+  ASN1Object lastSub() {
+    if (subCount() > 0) {
+      return sub.last;
+    }
+    return null;
+  }
+
   int subCount() {
     return sub?.length ?? 0;
   }

lib/src/X509Certificate/key_usage.dart

@@ -0,0 +1,55 @@
+class KeyUsage {
+  final int _value;
+
+  const KeyUsage._internal(this._value);
+
+  static List<KeyUsage> values = [
+    KeyUsage.digitalSignature,
+    KeyUsage.nonRepudiation,
+    KeyUsage.keyEncipherment,
+    KeyUsage.dataEncipherment,
+    KeyUsage.keyAgreement,
+    KeyUsage.keyCertSign,
+    KeyUsage.cRLSign,
+    KeyUsage.encipherOnly,
+    KeyUsage.decipherOnly,
+  ];
+
+  static KeyUsage fromIndex(int value) {
+    return KeyUsage.values.firstWhere((element) => element.toValue() == value, orElse: () => null);
+  }
+
+  int toValue() => _value;
+
+  String name() => _KeyUsageMapName[this._value];
+
+  @override
+  String toString() => "($_value, ${name()})";
+
+  static const digitalSignature = const KeyUsage._internal(0);
+  static const nonRepudiation = const KeyUsage._internal(1);
+  static const keyEncipherment = const KeyUsage._internal(2);
+  static const dataEncipherment = const KeyUsage._internal(3);
+  static const keyAgreement = const KeyUsage._internal(4);
+  static const keyCertSign = const KeyUsage._internal(5);
+  static const cRLSign = const KeyUsage._internal(6);
+  static const encipherOnly = const KeyUsage._internal(7);
+  static const decipherOnly = const KeyUsage._internal(8);
+
+  bool operator ==(value) => value == _value;
+
+  @override
+  int get hashCode => _value.hashCode;
+
+  static const Map<int, String> _KeyUsageMapName = {
+    0: "digitalSignature",
+    1: "nonRepudiation",
+    2: "keyEncipherment",
+    3: "dataEncipherment",
+    4: "keyAgreement",
+    5: "keyCertSign",
+    6: "cRLSign",
+    7: "encipherOnly",
+    8: "decipherOnly",
+  };
+}

lib/src/X509Certificate/main.dart

@@ -3,6 +3,7 @@ export 'asn1_distinguished_names.dart';
 export 'asn1_identifier.dart';
 export 'asn1_object.dart';
 export 'oid.dart';
+export 'key_usage.dart';
 export 'x509_certificate.dart';
 export 'x509_extension.dart';
 export 'x509_public_key.dart';

lib/src/X509Certificate/oid.dart

@@ -236,14 +236,15 @@ class OID {
     "1.2.840.113549.1.1.11": "sha256WithRSAEncryption",
     "1.2.840.113549.1.1.12": "sha384WithRSAEncryption",
     "1.2.840.113549.1.1.13": "sha512WithRSAEncryption",
-    "1.2.840.113549.1.7.1": "data",
+    "1.2.840.113549.1.7.1": "pkcs7data",
-    "1.2.840.113549.1.7.2": "signedData",
+    "1.2.840.113549.1.7.2": "pkcs7signedData",
+    "1.2.840.113549.1.7.3": "pkcs7envelopedData",
     "1.2.840.113549.1.9.1": "emailAddress",
     "1.2.840.113549.1.9.16.2.47": "signingCertificateV2",
     "1.2.840.113549.1.9.3": "contentType",
     "1.2.840.113549.1.9.4": "messageDigest",
     "1.2.840.113549.1.9.5": "signingTime",
-    "1.2.840.10040.4.3": 'dsa-with-sha1',
+    "1.2.840.10040.4.3": "dsaWithSha1",
     "1.3.6.1.4.1.11129.2.4.2": "certificateExtension",
     "1.3.6.1.4.1.311.60.2.1.2": "jurisdictionOfIncorporationSP",
     "1.3.6.1.4.1.311.60.2.1.3": "jurisdictionOfIncorporationC",
@@ -264,7 +265,7 @@ class OID {
     "1.2.840.113549.2.5": "md5",
     "2.16.840.1.113733.1.7.23.6": "VeriSign EV policy",
     "2.23.140.1.1": "extendedValidation",
-    "2.23.140.1.2.2": "extendedValidation",
+    "2.23.140.1.2.2": "organizationValidated",
     "2.5.29.14": "subjectKeyIdentifier",
     "2.5.29.15": "keyUsage",
     "2.5.29.17": "subjectAltName",

lib/src/X509Certificate/x509_certificate.dart

@@ -228,16 +228,16 @@ class X509Certificate {
     return value;
   }
 
-  /// Gets the signature value (the raw signature bits) from the certificate.
+  ///Gets the signature value (the raw signature bits) from the certificate.
   List<int> get signature => asn1[0].subAtIndex(2)?.value as List<int>;
 
-  /// Gets the signature algorithm name for the certificate signature algorithm.
+  ///Gets the signature algorithm name for the certificate signature algorithm.
   String get sigAlgName => OID.fromValue(sigAlgOID ?? "")?.name();
 
-  /// Gets the signature algorithm OID string from the certificate.
+  ///Gets the signature algorithm OID string from the certificate.
   String get sigAlgOID => block1.subAtIndex(2)?.subAtIndex(0)?.value as String;
 
-  /// Gets the DER-encoded signature algorithm parameters from this certificate's signature algorithm.
+  ///Gets the DER-encoded signature algorithm parameters from this certificate's signature algorithm.
   List<int> get sigAlgParams => null;
 
   ///Gets a boolean array representing bits of the KeyUsage extension, (OID = 2.5.29.15).
@@ -262,7 +262,7 @@ class X509Certificate {
       if (sub != null && sub.length > 0) {
         var data = sub.last.subAtIndex(0)?.value as List<int>;
         int bits = (data != null && data.length > 0) ? data.first ?? 0 : 0;
-        for (var index = 0; index < 7; index++) {
+        for (var index = 0; index < 8; index++) {
           var value = bits & (1 << index).toUnsigned(8) != 0;
           result.insert(0, value);
         }
@@ -321,12 +321,53 @@ class X509Certificate {
 
   ///Gets the certificate constraints path length from the
   ///critical BasicConstraints extension, (OID = 2.5.29.19).
-  int get basicConstraints => extensionObject(oid: OID.basicConstraints)?.value as int ?? -1;
+  int get basicConstraints {
+    var sub = extensionObject(oid: OID.basicConstraints)?.block?.lastSub()?.lastSub()?.lastSub();
+    if (sub != null) {
+      if (sub.value is List<int>) {
+        return (sub.value as List<int>).length;
+      }
+    }
+    return -1;
+  }
+
+  ///Gets the raw bits from the Subject Key Identifier (SKID) extension, (OID = 2.5.29.14).
+  List<int> get subjectKeyIdentifier =>
+      extensionObject(oid: OID.subjectKeyIdentifier)?.block?.lastSub()?.lastSub()?.value ?? <int>[];
+
+  ///Gets the raw bits from the Authority Key Identifier extension, (OID = 2.5.29.35).
+  List<int> get authorityKeyIdentifier =>
+      extensionObject(oid: OID.authorityKeyIdentifier)?.block?.lastSub()?.lastSub()?.firstSub()?.value ?? <int>[];
+
+  ///Gets the list of certificate policies from the CertificatePolicies extension, (OID = 2.5.29.32).
+  List<String> get certificatePolicies =>
+      extensionObject(oid: OID.certificatePolicies)?.block?.lastSub()?.firstSub()?.sub?.map((e) => e.firstSub()?.value as String)?.toList() ?? <String>[];
+
+  ///Gets the list of CRL distribution points from the CRLDistributionPoints extension, (OID = 2.5.29.31).
+  List<String> get cRLDistributionPoints =>
+      extensionObject(oid: OID.cRLDistributionPoints)?.block?.lastSub()?.firstSub()?.sub?.map((e) => e.firstSub()?.firstSub()?.firstSub()?.value as String)?.toList() ?? <String>[];
+
+  ///Gets the map of the format (as a key) and location (as a value) of additional information
+  ///about the CA who issued the certificate in which this extension appears
+  ///from the AuthorityInfoAccess extension, (OID = 1.3.6.1.5.5.5.7.1.1).
+  Map<String, String> get authorityInfoAccess {
+    var result = <String, String>{};
+    var sub = extensionObject(oid: OID.authorityInfoAccess)?.block?.lastSub()?.firstSub()?.sub;
+    if (sub != null) {
+      sub.forEach((element) {
+        if (element.subCount() > 1) {
+          result.putIfAbsent(element.subAtIndex(0).value,
+              () => element.subAtIndex(1).value);
+        }
+      });
+    }
+    return result;
+  }
 
   List<ASN1Object> get extensionBlocks =>
       block1.atIndex(X509BlockPosition.extensions)?.subAtIndex(0)?.sub;
 
-  ///Gets the extension information of the given OID code or enum.
+  ///Gets the extension information of the given OID code or enum string value.
   X509Extension extensionObject({String oidValue, OID oid}) {
     if (oidValue == null && oid != null) {
       oidValue = oid.toValue();
@@ -346,21 +387,7 @@ class X509Certificate {
   ///Format subject/issuer information in RFC1779
   String blockDistinguishedName({@required ASN1Object block}) {
     var result = "";
-    List<ASN1DistinguishedNames> oidNames = [
+    for (var oidName in ASN1DistinguishedNames.values) {
-      ASN1DistinguishedNames.COMMON_NAME,
-      ASN1DistinguishedNames.DN_QUALIFIER,
-      ASN1DistinguishedNames.SERIAL_NUMBER,
-      ASN1DistinguishedNames.GIVEN_NAME,
-      ASN1DistinguishedNames.SURNAME,
-      ASN1DistinguishedNames.ORGANIZATIONAL_UNIT_NAME,
-      ASN1DistinguishedNames.ORGANIZATION_NAME,
-      ASN1DistinguishedNames.STREET_ADDRESS,
-      ASN1DistinguishedNames.LOCALITY_NAME,
-      ASN1DistinguishedNames.STATE_OR_PROVINCE_NAME,
-      ASN1DistinguishedNames.COUNTRY_NAME,
-      ASN1DistinguishedNames.EMAIL
-    ];
-    for (var oidName in oidNames) {
       var oidBlock = block.findOid(oidValue: oidName.oid());
       if (oidBlock != null) {
         if (result.isNotEmpty) {
@@ -419,6 +446,11 @@ class X509Certificate {
       "nonCriticalExtensionOIDs": nonCriticalExtensionOIDs,
       "encoded": encoded,
       "publicKey": publicKey?.toMap(),
+      "subjectKeyIdentifier": subjectKeyIdentifier,
+      "authorityKeyIdentifier": authorityKeyIdentifier,
+      "certificatePolicies": certificatePolicies,
+      "cRLDistributionPoints": cRLDistributionPoints,
+      "authorityInfoAccess": authorityInfoAccess,
     };
   }
 

lib/src/X509Certificate/x509_extension.dart

@@ -39,9 +39,9 @@ class X509Extension {
 
   List<String> get valueAsStrings {
     var result = <String>[];
-    var sub = <ASN1Object>[];
+    var sub;
     try {
-      sub = block.sub?.last?.sub?.last?.sub;
+      sub = block.sub?.last?.sub?.last?.sub ?? <ASN1Object>[];
     } catch (e) {}
 
     for (var item in sub) {