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 public interface ExtensionThis interface represents an X.509 extension.Extensions provide a means of associating additional attributes with users or public keys and for managing a certification hierarchy. The extension format also allows communities to define private extensions to carry information unique to those communities. Each extension contains an object identifier, a criticality setting indicating whether it is a critical or a non-critical extension, and and an ASN.1 DER-encoded value. Its ASN.1 definition is: Extension ::= SEQUENCE { extnId OBJECT IDENTIFIER, critical BOOLEAN DEFAULT FALSE, extnValue OCTET STRING -- contains a DER encoding of a value -- of the type registered for use with -- the extnId object identifier value }This interface is designed to provide access to a single extension, unlike X509Extensionwhich is more suitable for accessing a set of extensions.- Since:
- 1.7
 
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Method SummaryAll Methods Instance Methods Abstract Methods Modifier and Type Method Description voidencode(OutputStream out)Generates the extension's DER encoding and writes it to the output stream.StringgetId()Gets the extensions's object identifier.byte[]getValue()Gets the extensions's DER-encoded value.booleanisCritical()Gets the extension's criticality setting.
 
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Method Detail- 
getIdString getId() Gets the extensions's object identifier.- Returns:
- the object identifier as a String
 
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isCriticalboolean isCritical() Gets the extension's criticality setting.- Returns:
- true if this is a critical extension.
 
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getValuebyte[] getValue() Gets the extensions's DER-encoded value. Note, this is the bytes that are encoded as an OCTET STRING. It does not include the OCTET STRING tag and length.- Returns:
- a copy of the extension's value, or nullif no extension value is present.
 
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encodevoid encode(OutputStream out) throws IOException Generates the extension's DER encoding and writes it to the output stream.- Parameters:
- out- the output stream
- Throws:
- IOException- on encoding or output error.
- NullPointerException- if- outis- null.
 
 
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