ASN1Object class
Holds the encoded and decoded representation of an ASN1 object.
Object are allocated in two ways:
/// A value can be supplied representing the ASN1 Type for the object (Integer, String, etc.). The encoded bytes can be read by calling encodedBytes. /// Conversely, the object can be initialized from an incoming BER byte array. Using ASN1Object.fromBytes(). This byte stream can then be decoded to its correspoding ASN1 type.
Constructors
- ASN1Object.new({int tag = 0})
- Create an ASN1Object. Optionally set the tag
- ASN1Object.fromBytes(Uint8List bytes)
-
Create an ASN1Object from the given
bytes. - ASN1Object.preEncoded(int tag, Uint8List valBytes)
- Create an object that encapsulates a set of value bytes that are already encoded.
Properties
- encodedBytes → Uint8List
-
Get the encoded byte representation for this object. This can trigger
calling the subclasss
_encodemethod if the object has not yet been encodedno setter - extendedTag → int?
-
no setter
- hasExtendedTag → bool
-
no setter
- hashCode → int
-
The hash code for this object.
no setteroverride
- isEncoded → bool
-
Check if the encoding is ready.
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- tag → int
-
The BER tag representing this object
final
- totalEncodedByteLength → int
-
The total length of this object in bytes - including its value
bytes and the encoded tag and length bytes.
no setter
Methods
-
contentBytes(
) → Uint8List - Returns the real content of a tag. This might be equal to valueBytes for some tags.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toHexString(
) → String -
toString(
) → String -
A string representation of this object.
override
-
valueBytes(
) → Uint8List - Return just the value bytes.
Operators
-
operator ==(
Object other) → bool -
The equality operator.
override
Static Methods
-
decodeLength(
Uint8List encodedBytes, {int offset = 1}) → (int, int) - Decode the asn1 length field from the encoded bytes
-
encodeLength(
int length) → Uint8List - Encode a BER length - into 1 to 5 bytes as appropriate Values less than <= 127 are encoded in a single byte If the value is larger than 127, the first byte contains 0x80 + the number of following bytes used to represent the length The length is encoded by the ///fewest/// number of bytes possible - treated as an unsigned binary value.