DERNode

Overview

DERNode is a class in Aspose.PDF FOSS for Java.

Represents a parsed ASN.1 DER (Distinguished Encoding Rules) node.

This class provides 22 methods for working with DERNode objects in Java programs. Available methods include: getChild, getChildCount, getChildren, getEncodedSize, getInteger, getOID, getString, getTag, getValue, isBitString, isConstructed, isContextTag, and 9 additional methods. All public members are accessible to any Java application after installing the Aspose.PDF FOSS for Java package. Properties: bitString, childCount, children, constructed, encodedSize, integer, and 8 more.

Properties

Name	Type	Access	Description
`tag`	`int`	Read	Returns the tag byte.
`value`	`byte[]`	Read	Returns the raw value bytes.
`children`	`List<DERNode>`	Read	Returns child nodes (for constructed types).
`constructed`	`boolean`	Read	Returns true if this is a constructed type.
`childCount`	`int`	Read	Returns the number of children.
`sequence`	`boolean`	Read	Gets the sequence.
`set`	`boolean`	Read	Gets the set.
`octetString`	`boolean`	Read	Gets the octet string.
`integer`	`BigInteger`	Read	Extracts an INTEGER value.
`oID`	`String`	Read	Decodes an OID to dotted string.
`bitString`	`boolean`	Read	Gets the bit string.
`null`	`boolean`	Read	Gets the null.
`string`	`String`	Read	Extracts a string value (PrintableString, UTF8String, IA5String, etc.).
`encodedSize`	`int`	Read	Returns the total DER-encoded size of this node.

Methods

Signature	Description
`parse(data: byte[])` → `DERNode`	Parses a DER-encoded byte array into a node tree.
`parse(data: byte[], offset: int, limit: int)` → `DERNode`	Parses starting at offset, consuming up to limit.
`parseAll(data: byte[], offset: int, limit: int)` → `List<DERNode>`	Parses all sequential nodes between offset and limit.
`getTag()` → `int`	Returns the tag byte.
`getValue()` → `byte[]`	Returns the raw value bytes.
`getChildren()` → `List<DERNode>`	Returns child nodes (for constructed types).
`isConstructed()` → `boolean`	Returns true if this is a constructed type.
`getChild(index: int)` → `DERNode`	Returns the child at the given index.
`getChildCount()` → `int`	Returns the number of children.
`isSequence()` → `boolean`	Returns true if sequence is set.
`isSet()` → `boolean`	Returns true if set is set.
`isOctetString()` → `boolean`	Returns true if octet string is set.
`isInteger()` → `boolean`	Returns true if integer is set.
`isOID()` → `boolean`	Returns true if oid is set.
`isBitString()` → `boolean`	Returns true if bit string is set.
`isNull()` → `boolean`	Returns true if null is set.
`isContextTag(n: int)` → `boolean`
`getInteger()` → `BigInteger`	Extracts an INTEGER value.
`getOID()` → `String`	Decodes an OID to dotted string.
`getString()` → `String`	Extracts a string value (PrintableString, UTF8String, IA5String, etc.).
`getEncodedSize()` → `int`	Returns the total DER-encoded size of this node.
`toString()` → `String`

DERNode

Overview

Properties

Methods

See Also