java.lang.Object
- org.apache.harmony.security.asn1.BerInputStream

Direct Known Subclasses:

DerInputStream
```
public class BerInputStream
extends Object
```
Decodes ASN.1 types encoded with BER (X.690)

See Also:

ASN.1

Field Summary

Fields
Modifier and Type	Field	Description
`protected byte[]`	`buffer`
`int`	`choiceIndex`	The last choice index
`Object`	`content`	Current decoded content
`protected int`	`contentOffset`	Current decoded content offset
`protected static int`	`INDEFINIT_LENGTH`	Indicates indefinite length of the current type
`protected boolean`	`isIndefinedLength`	Indicates defined or indefined reading mode for associated InputStream.
`protected boolean`	`isVerify`	Indicates verify or store mode.
`protected int`	`length`	Current decoded length
`protected int`	`offset`	The position in the buffer.
`int`	`oidElement`
`int`	`tag`	Current decoded tag
`protected int`	`tagOffset`	Current decoded tag offset
`int[]`	`times`	Keeps last decoded: year, month, day, hour, minute, second, millisecond

Constructor Summary

Constructors
Constructor	Description
`BerInputStream(byte[] encoded)`	Creates stream for decoding.
`BerInputStream(byte[] encoded, int offset, int expectedLength)`	Creates stream for decoding.
`BerInputStream(InputStream in)`	Creates stream for decoding.
`BerInputStream(InputStream in, int initialSize)`	Creates stream for decoding.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`compactBuffer()`	Reallocates the buffer in order to make it exactly the size of data it contains
`Object`	`get(Object key)`
`byte[]`	`getBuffer()`	Returns internal buffer used for decoding
`byte[]`	`getEncoded()`	Returns encoded array.
`int`	`getEndOffset()`	Returns end offset for the current encoded type
`int`	`getLength()`	Returns length of the current content for decoding
`static int`	`getLength(byte[] encoding)`	Returns the length of the encoding
`int`	`getOffset()`	Returns the current offset
`int`	`getTagOffset()`	Returns start offset for the current encoded type
`int`	`next()`	Decodes next encoded type.
`void`	`put(Object key, Object entry)`
`protected int`	`read()`	Reads the next encoded byte from the encoded input stream.
`void`	`readBitString()`	Decodes ASN.1 bitstring type
`void`	`readBoolean()`	Decodes ASN.1 boolean type
`void`	`readContent()`	Reads the next encoded content from the encoded input stream.
`void`	`readEnumerated()`	Decodes ASN.1 Enumerated type
`void`	`readGeneralizedTime()`	Decodes ASN.1 GeneralizedTime type
`void`	`readInteger()`	Decodes ASN.1 Integer type
`void`	`readOctetString()`	Decodes ASN.1 Octetstring type
`void`	`readOID()`	Decodes ASN.1 ObjectIdentifier type
`void`	`readSequence(ASN1Sequence sequence)`	Decodes ASN.1 Sequence type
`void`	`readSequenceOf(ASN1SequenceOf sequenceOf)`	Decodes ASN.1 SequenceOf type
`void`	`readSet(ASN1Set set)`	Decodes ASN.1 Set type
`void`	`readSetOf(ASN1SetOf setOf)`	Decodes ASN.1 SetOf type
`void`	`readString(ASN1StringType type)`	Decodes ASN.1 String type
`void`	`readUTCTime()`	Decodes ASN.1 UTCTime type
`void`	`reset(byte[] encoded)`	Resets this stream to initial state.
`void`	`setVerify()`	Sets verify mode.

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

- Field Detail
  - buffer
```
protected byte[] buffer
```
  - offset
```
protected int offset
```
    The position in the buffer. Next read must place data into the buffer from this offset
  - INDEFINIT_LENGTH
```
protected static final int INDEFINIT_LENGTH
```
    Indicates indefinite length of the current type
    
    See Also:
    
    Constant Field Values
  - tag
```
public int tag
```
    Current decoded tag
  - length
```
protected int length
```
    Current decoded length
  - content
```
public Object content
```
    Current decoded content
  - tagOffset
```
protected int tagOffset
```
    Current decoded tag offset
  - contentOffset
```
protected int contentOffset
```
    Current decoded content offset
  - choiceIndex
```
public int choiceIndex
```
    The last choice index
  - times
```
public int[] times
```
    Keeps last decoded: year, month, day, hour, minute, second, millisecond
  - oidElement
```
public int oidElement
```
  - isVerify
```
protected boolean isVerify
```
    Indicates verify or store mode. In store mode a decoded content is stored in a newly allocated appropriate object. The content variable holds a reference to the last created object. In verify mode a decoded content is not stored.
  - isIndefinedLength
```
protected boolean isIndefinedLength
```
    Indicates defined or indefined reading mode for associated InputStream. This mode is defined by reading a length for a first ASN.1 type from InputStream.
- Constructor Detail
  - BerInputStream
```
public BerInputStream(byte[] encoded)
               throws IOException
```
    Creates stream for decoding.
    
    Throws:
    
    IOException
  - BerInputStream
```
public BerInputStream(byte[] encoded,
                      int offset,
                      int expectedLength)
               throws IOException
```
    Creates stream for decoding.
    
    Parameters:
    
    encoded - bytes array to be decoded
    
    offset - the encoding offset
    
    expectedLength - expected length of full encoding, this includes identifier, length an content octets
    
    Throws:
    
    IOException
  - BerInputStream
```
public BerInputStream(InputStream in)
               throws IOException
```
    Creates stream for decoding. Allocates initial buffer of default size
    
    Throws:
    
    IOException
  - BerInputStream
```
public BerInputStream(InputStream in,
                      int initialSize)
               throws IOException
```
    Creates stream for decoding.
    
    Parameters:
    
    initialSize - the internal buffer initial size
    
    Throws:
    
    IOException
- Method Detail
  - reset
```
public final void reset(byte[] encoded)
                 throws IOException
```
    Resets this stream to initial state.
    
    Parameters:
    
    encoded - a new bytes array to be decoded
    
    Throws:
    
    IOException - if an error occurs
  - next
```
public int next()
         throws IOException
```
    Decodes next encoded type. Initializes tag, length, tagOffset and contentOffset variables
    
    Returns:
    
    next decoded tag
    
    Throws:
    
    IOException - if error occured
  - getLength
```
public static int getLength(byte[] encoding)
```
    Returns the length of the encoding
  - readBitString
```
public void readBitString()
                   throws IOException
```
    Decodes ASN.1 bitstring type
    
    Throws:
    
    IOException
  - readEnumerated
```
public void readEnumerated()
                    throws IOException
```
    Decodes ASN.1 Enumerated type
    
    Throws:
    
    IOException
  - readBoolean
```
public void readBoolean()
                 throws IOException
```
    Decodes ASN.1 boolean type
    
    Throws:
    
    IOException
  - readGeneralizedTime
```
public void readGeneralizedTime()
                         throws IOException
```
    Decodes ASN.1 GeneralizedTime type
    
    Throws:
    
    IOException - if error occured
  - readUTCTime
```
public void readUTCTime()
                 throws IOException
```
    Decodes ASN.1 UTCTime type
    
    Throws:
    
    IOException - if an I/O error occurs or the end of the stream is reached
  - readInteger
```
public void readInteger()
                 throws IOException
```
    Decodes ASN.1 Integer type
    
    Throws:
    
    IOException
  - readOctetString
```
public void readOctetString()
                     throws IOException
```
    Decodes ASN.1 Octetstring type
    
    Throws:
    
    IOException
  - readOID
```
public void readOID()
             throws IOException
```
    Decodes ASN.1 ObjectIdentifier type
    
    Throws:
    
    IOException
  - readSequence
```
public void readSequence(ASN1Sequence sequence)
                  throws IOException
```
    Decodes ASN.1 Sequence type
    
    Throws:
    
    IOException
  - readSequenceOf
```
public void readSequenceOf(ASN1SequenceOf sequenceOf)
                    throws IOException
```
    Decodes ASN.1 SequenceOf type
    
    Throws:
    
    IOException
  - readSet
```
public void readSet(ASN1Set set)
             throws IOException
```
    Decodes ASN.1 Set type
    
    Throws:
    
    IOException
  - readSetOf
```
public void readSetOf(ASN1SetOf setOf)
               throws IOException
```
    Decodes ASN.1 SetOf type
    
    Throws:
    
    IOException
  - readString
```
public void readString(ASN1StringType type)
                throws IOException
```
    Decodes ASN.1 String type
    
    Throws:
    
    IOException - if an I/O error occurs or the end of the stream is reached
  - getEncoded
```
public byte[] getEncoded()
```
    Returns encoded array. MUST be invoked after decoding corresponding ASN.1 notation
  - getBuffer
```
public final byte[] getBuffer()
```
    Returns internal buffer used for decoding
  - getLength
```
public final int getLength()
```
    Returns length of the current content for decoding
  - getOffset
```
public final int getOffset()
```
    Returns the current offset
  - getEndOffset
```
public final int getEndOffset()
```
    Returns end offset for the current encoded type
  - getTagOffset
```
public final int getTagOffset()
```
    Returns start offset for the current encoded type
  - setVerify
```
public final void setVerify()
```
    Sets verify mode.
  - read
```
protected int read()
            throws IOException
```
    Reads the next encoded byte from the encoded input stream.
    
    Throws:
    
    IOException
  - readContent
```
public void readContent()
                 throws IOException
```
    Reads the next encoded content from the encoded input stream. The method MUST be used for reading a primitive encoded content.
    
    Throws:
    
    IOException
  - compactBuffer
```
public void compactBuffer()
```
    Reallocates the buffer in order to make it exactly the size of data it contains
  - put
```
public void put(Object key,
                Object entry)
```
  - get
```
public Object get(Object key)
```

Class BerInputStream

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

buffer

offset

INDEFINIT_LENGTH

tag

length

content

tagOffset

contentOffset

choiceIndex

times

oidElement

isVerify

isIndefinedLength

Constructor Detail

BerInputStream

BerInputStream

BerInputStream

BerInputStream

Method Detail

reset

next

getLength

readBitString

readEnumerated

readBoolean

readGeneralizedTime

readUTCTime

readInteger

readOctetString

readOID

readSequence

readSequenceOf

readSet

readSetOf

readString

getEncoded

getBuffer

getLength

getOffset

getEndOffset

getTagOffset

setVerify

read

readContent

compactBuffer

put

get