Tag (FusionAuth JWT 5.2.3 API)

java.lang.Object
- io.fusionauth.der.Tag

```
public class Tag
extends Object
```
This object models a ASN.1 DER Tag.

Author:

Daniel DeGroff

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`BitString` Bit String Tag
`static int`	`Integer` Integer Tag
`static int`	`Null` Null Tag
`static int`	`ObjectIdentifier` Object Identifier Tag
`static int`	`OctetString` Octet String Tag
`boolean`	`primitive` True if this Tag is primitive.
`static int`	`PrintableString` PrintableString Tag
`byte`	`rawByte` The raw byte read from the DER encoded array.
`static int`	`Sequence` Sequence Tag
`static int`	`Set` Set and Set of
`TagClass`	`tagClass` The class of this tag read from bits 8 and 7 of the raw byte.
`static int`	`UTCTime` UTCTime Tag
`int`	`value` The tag value in decimal.

Constructor Summary

Constructors
Constructor and Description

Tag(int value)
Construct a new tag from the tag byte in the DER byte array.

Constructors
Constructor and Description
`Tag(int value)` Construct a new tag from the tag byte in the DER byte array.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`equals(Object o)`
`String`	`getName()`
`int`	`hashCode()`
`boolean`	`is(int tag)`
`boolean`	`isConstructed()`
`boolean`	`isPrimitive()`
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - BitString
```
public static final int BitString
```
    Bit String Tag
    
    See Also:
    
    Constant Field Values
  - Integer
```
public static final int Integer
```
    Integer Tag
    
    See Also:
    
    Constant Field Values
  - Null
```
public static final int Null
```
    Null Tag
    
    See Also:
    
    Constant Field Values
  - ObjectIdentifier
```
public static final int ObjectIdentifier
```
    Object Identifier Tag
    
    See Also:
    
    Constant Field Values
  - OctetString
```
public static final int OctetString
```
    Octet String Tag
    
    See Also:
    
    Constant Field Values
  - PrintableString
```
public static final int PrintableString
```
    PrintableString Tag
    19 decimal, 0x13 hex
    
    See Also:
    
    Constant Field Values
  - Sequence
```
public static final int Sequence
```
    Sequence Tag
    16 decimal, 0x10 hex, 0b00010000 binary
    Because the Sequence tag is always in a constructed form (not primitive), the tag will present as 0x30 because the 6th bit is a 1 indicating a constructed form. So the raw sequence of 0b00010000 becomes 0b00110000 which is 48 decimal.
    
    See Also:
    
    Constant Field Values
  - Set
```
public static final int Set
```
    Set and Set of
    17 decimal, 0x11 hex
    
    See Also:
    
    Constant Field Values
  - UTCTime
```
public static final int UTCTime
```
    UTCTime Tag
    23 decimal, 0x17 hex
    
    See Also:
    
    Constant Field Values
  - primitive
```
public final boolean primitive
```
    True if this Tag is primitive. False if this Tag is constructed.
  - rawByte
```
public final byte rawByte
```
    The raw byte read from the DER encoded array. This byte includes the class, form and tag number.
  - tagClass
```
public final TagClass tagClass
```
    The class of this tag read from bits 8 and 7 of the raw byte.
  - value
```
public final int value
```
    The tag value in decimal. This value will only represent the decimal value of bits 5 to 1.
    For example, if this is a sequence tag, this value will be 16 and you should expect primitive to be false. If you want the raw byte which will be 48 or 0x30 you can read rawByte.
- Constructor Detail
  - Tag
```
public Tag(int value)
```
    Construct a new tag from the tag byte in the DER byte array. The following depicts the layout of the tag byte.
```
   ---------------------------------------------------------
   |  b8  |  b7  |  b6  |  b5  |  b4  |  b3  |  b2  |  b1  |
   ---------------------------------------------------------
      |______|      |      |___________________________|
        |           |                         |
        |           |-- [0] Primitive         |
        |           |-- [1] Constructed       |
        |                                  Tag Number (value)
        | Class
        |---------------------------
        |-- 0  0  Universal
        |-- 0  1  Application
        |-- 1  0  Context Specific
        |-- 1  1  Private
 
```
    Parameters:
    
    value - the tag value from the DER byte array
- Method Detail
  - equals
```
public boolean equals(Object o)
```
    Overrides:
    
    equals in class Object
  - getName
```
public String getName()
```
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - is
```
public boolean is(int tag)
```
    Parameters:
    
    tag - a tag
    
    Returns:
    
    true if this tag has the same value as requested
  - isConstructed
```
public boolean isConstructed()
```
  - isPrimitive
```
public boolean isPrimitive()
```
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class Tag

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

BitString

Integer

Null

ObjectIdentifier

OctetString

PrintableString

Sequence

Set

UTCTime

primitive

rawByte

tagClass

value

Constructor Detail

Tag

Method Detail

equals

getName

hashCode

is

isConstructed

isPrimitive

toString