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gnu.java.security.der
Class DERReader  

java.lang.Object
  gnu.java.security.der.DERReader

All Implemented Interfaces:

DER

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public class DERReader

extends java.lang.Object

implements DER

This class decodes DER sequences into Java objects. The methods of this class do not have knowledge of higher-levels of structure in the DER stream -- such as ASN.1 constructions -- and it is therefore up to the calling application to determine if the data are structured properly by inspecting the DERValue that is returned.

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Field Summary
protected  java.io.ByteArrayOutputStream	encBuf
protected  java.io.InputStream	in

 

Fields inherited from interface gnu.java.security.der.DER

ANY, APPLICATION, BIT_STRING, BMP_STRING, BOOLEAN, CONSTRUCTED, CONSTRUCTED_VALUE, CONTEXT, ENUMERATED, GENERAL_STRING, GENERALIZED_TIME, GRAPHIC_STRING, IA5_STRING, INTEGER, ISO646_STRING, NULL, NUMERIC_STRING, OBJECT_IDENTIFIER, OCTET_STRING, PRINTABLE_STRING, PRIVATE, REAL, RELATIVE_OID, SEQUENCE, SET, T61_STRING, UNIVERSAL, UNIVERSAL_STRING, UTC_TIME, UTF8_STRING, VIDEOTEX_STRING

 

Constructor Summary

DERReader(byte[] in)           Create a new DER reader from a byte array.

DERReader(byte[] in, int off, int len)

DERReader(java.io.InputStream in)           Create a new DER readed from an input stream.

 

Method Summary
private static java.lang.String	fromIso88591(byte[] bytes)
private static java.lang.String	fromUtf16Be(byte[] bytes)
private static java.lang.String	fromUtf8(byte[] bytes)
private static java.lang.String	makeString(int tag, byte[] value)
private  java.util.Date	makeTime(int tag, byte[] value)
DERValue	read()           Decode a single value from the input stream, returning it in a new DERValue.
static DERValue	read(byte[] encoded)           Convenience method for reading a single primitive value from the given byte array.
protected  int	readLength()
private  java.lang.Object	readUniversal(int tag, int len)
void	skip(int bytes)

 

Methods inherited from class java.lang.Object

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

 

Field Detail

in

protected java.io.InputStream in

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encBuf

protected final java.io.ByteArrayOutputStream encBuf

Constructor Detail

DERReader

public DERReader(byte[] in)

Create a new DER reader from a byte array.

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DERReader

public DERReader(byte[] in,
                 int off,
                 int len)

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DERReader

public DERReader(java.io.InputStream in)

Create a new DER readed from an input stream.

Method Detail

read

public static DERValue read(byte[] encoded)
                     throws java.io.IOException

Convenience method for reading a single primitive value from the given byte array.

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skip

public void skip(int bytes)
          throws java.io.IOException

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read

public DERValue read()
              throws java.io.IOException

Decode a single value from the input stream, returning it in a new DERValue. By "single value" we mean any single type in its entirety -- including constructed types such as SEQUENCE and all the values they contain. Usually it is sufficient to call this method once to parse and return the top-level structure, then to inspect the returned value for the proper contents.

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readLength

protected int readLength()
                  throws java.io.IOException

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readUniversal

private java.lang.Object readUniversal(int tag,
                                       int len)
                                throws java.io.IOException

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makeString

private static java.lang.String makeString(int tag,
                                           byte[] value)
                                    throws java.io.IOException

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fromIso88591

private static java.lang.String fromIso88591(byte[] bytes)

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fromUtf16Be

private static java.lang.String fromUtf16Be(byte[] bytes)
                                     throws java.io.IOException

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fromUtf8

private static java.lang.String fromUtf8(byte[] bytes)
                                  throws java.io.IOException

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makeTime

private java.util.Date makeTime(int tag,
                                byte[] value)
                         throws java.io.IOException

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> gnu >> java >> security >> [ der overview ]	PREV CLASS  NEXT CLASS
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