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oracle.security.crypto.asn1
Class ASN1Header

java.lang.Object
oracle.security.crypto.asn1.ASN1Header

All Implemented Interfaces:

ASN1, Streamable

public class ASN1Header

extends java.lang.Object

implements Streamable, ASN1

Represents the header (tag, encoding method, and length) of an ASN.1 object encoding.

Field Summary

Fields inherited from interface oracle.security.crypto.asn1.ASN1

APPLICATION, BIT_STRING, BMP_STRING, BOOLEAN, CONSTRUCTED, CONSTRUCTED_DEFINITE, CONSTRUCTED_INDEFINITE, CONTEXT_SPECIFIC, END_OF_CONTENTS, ENUMERATED, EXTERNAL, GENERAL_STRING, GENERALIZED_TIME, GRAPHIC_STRING, IA5STRING, INTEGER, ISO646_STRING, NULL, NUMERIC_STRING, OBJECT_DESCRIPTOR, OBJECT_IDENTIFIER, OCTET_STRING, PRIMITIVE, PRINTABLE_STRING, PRIVATE, REAL, SEQUENCE, SET, T61STRING, TAG, TAG_CLASS, TELETEX_STRING, UNIVERSAL, UNIVERSAL_STRING, UTCTIME, UTF8_STRING, VIDEOTEX_STRING, VISIBLE_STRING

Constructor Summary

ASN1Header()
Creates an uninitialized ASN.1 header.

ASN1Header(java.io.InputStream is)

ASN1Header(int t, int c)
Creates an ASN1 Header of the specified tag and tag class.

ASN1Header(int t, int c, int m, int l)
Creates an ASN1 Header of the specified tag, tag class, encoding method, and length.

Method Summary

void	checkEncodingMethod(int encodingMethod)
void	checkTag(int tag)
void	checkTagClass(int tagClass)
java.lang.String	encodingMethodToString(int encodingMethod)
int	getBodyLength() Returns the length of the body of this ASN.1 object.
int	getEncodingMethod()
int	getTag()
int	getTagClass()
byte[]	headerAndBody(java.io.InputStream is)
void	input(java.io.InputStream is) Reads this header from the specified input stream.
int	length() Returns the length of the DER encoding of this ASN.1 header.
void	output(java.io.OutputStream os) Writes this header to the specified output stream.
byte[]	readBody(java.io.InputStream is) Reads in the body from the specified input stream and returns it as a byte array.
void	skipBody(java.io.InputStream is)
java.lang.String	tagClassToString(int tagClass)
java.lang.String	tagToString(int tag)
java.lang.String	toString()
int	totalLength() Returns the total length of the ASN.1 object corresponding to this header.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ASN1Header

public ASN1Header()

Creates an uninitialized ASN.1 header.

ASN1Header

public ASN1Header(int t,
                  int c)

Creates an ASN1 Header of the specified tag and tag class. The encoding method is Constructed/Indefinite-length.

Parameters:

t - The universal-class tag for this type (e.g., ASN1.IA5STRING)

c - The tag class (e.g., ASN1.UNIVERSAL).

ASN1Header

public ASN1Header(int t,
                  int c,
                  int m,
                  int l)

Creates an ASN1 Header of the specified tag, tag class, encoding method, and length.

Parameters:

t - The universal-class tag for this type (e.g., ASN1.IA5STRING)

c - The tag class (e.g., ASN1.UNIVERSAL).

m - The encoding method.

l - The body length.

ASN1Header

public ASN1Header(java.io.InputStream is)
           throws java.io.IOException

Throws:

java.io.IOException

Method Detail

getTag

public int getTag()

getTagClass

public int getTagClass()

getEncodingMethod

public int getEncodingMethod()

getBodyLength

public int getBodyLength()

Returns the length of the body of this ASN.1 object. This is only meaningful for primitive and constructed, definite-length encodings; in the constructed, indefinite-length case, -1 is returned.

length

public int length()

Returns the length of the DER encoding of this ASN.1 header.

Specified by:

length in interface Streamable

totalLength

public int totalLength()

Returns the total length of the ASN.1 object corresponding to this header. That is, the length of this header plus the body length of the object it describes.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

tagClassToString

public java.lang.String tagClassToString(int tagClass)

tagToString

public java.lang.String tagToString(int tag)

encodingMethodToString

public java.lang.String encodingMethodToString(int encodingMethod)

checkTagClass

public void checkTagClass(int tagClass)
                   throws ASN1FormatException

Throws:

ASN1FormatException

checkTag

public void checkTag(int tag)
              throws ASN1FormatException

Throws:

ASN1FormatException

checkEncodingMethod

public void checkEncodingMethod(int encodingMethod)
                         throws ASN1FormatException

Throws:

ASN1FormatException

output

public void output(java.io.OutputStream os)
            throws java.io.IOException

Writes this header to the specified output stream.

Specified by:

output in interface Streamable

Throws:

java.io.IOException

input

public void input(java.io.InputStream is)
           throws java.io.IOException

Reads this header from the specified input stream.

Specified by:

input in interface Streamable

Throws:

java.io.IOException

skipBody

public void skipBody(java.io.InputStream is)
              throws java.io.IOException

Throws:

java.io.IOException

readBody

public byte[] readBody(java.io.InputStream is)
                throws java.io.IOException

Reads in the body from the specified input stream and returns it as a byte array.

Throws:

java.io.IOException

headerAndBody

public byte[] headerAndBody(java.io.InputStream is)
                     throws java.io.IOException

Throws:

java.io.IOException

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