java.lang.Object
- java.io.OutputStream
- - java.io.ByteArrayOutputStream
  - - org.mozilla.jss.netscape.security.util.DerOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable, DerEncoder
```
public class DerOutputStream
extends java.io.ByteArrayOutputStream
implements DerEncoder
```
Output stream marshaling DER-encoded data. This is eventually provided in the form of a byte array; there is no advance limit on the size of that byte array.
At this time, this class supports only a subset of the types of DER data encodings which are defined. That subset is sufficient for generating most X.509 certificates.

Field Summary
- Fields inherited from class java.io.ByteArrayOutputStream
  buf, count

Constructor Summary

Constructors
Constructor Description

DerOutputStream()
Construct an DER output stream.

DerOutputStream(int size)
Construct an DER output stream.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`derEncode(java.io.OutputStream out)`	Write the current contents of this `DerOutputStream` to an `OutputStream`.
`byte[]`	`getDateBytes(java.util.Date d, boolean UTC)`
`void`	`putBitString(byte[] bits)`	Marshals a DER bit string on the output stream.
`void`	`putBMPString(java.lang.String s)`	Marshals a string which is consists of BMP (unicode) characters
`void`	`putBoolean(boolean val)`	Marshals a DER boolean on the output stream.
`void`	`putDerValue(DerValue val)`	Marshals pre-encoded DER value onto the output stream.
`void`	`putEnumerated(int i)`	Marshals a DER enumerated value on the output stream.
`void`	`putGeneralizedTime(java.util.Date d)`	Marshals a DER Generalized Time/date value.
`void`	`putGeneralString(java.lang.String s)`
`void`	`putIA5String(java.lang.String s)`	Marshals a string which is consists of IA5(ASCII) characters
`void`	`putInteger(BigInt i)`	Marshals a DER unsigned integer on the output stream.
`void`	`putLength(int len)`	Put the encoding of the length in the stream.
`void`	`putNull()`	Marshals a DER "null" value on the output stream.
`void`	`putOctetString(byte[] octets)`	DER-encodes an ASN.1 OCTET STRING value on the output stream.
`void`	`putOID(ObjectIdentifier oid)`	Marshals an object identifier (OID) on the output stream.
`void`	`putOrderedSet(byte tag, DerEncoder[] set)`	Marshals the contents of a set on the output stream.
`void`	`putOrderedSetOf(byte tag, DerEncoder[] set)`	Marshals the contents of a set on the output stream.
`void`	`putPrintableString(java.lang.String s)`	Converts string to printable and writes to der output stream.
`void`	`putSequence(DerValue[] seq)`	Marshals a sequence on the output stream.
`void`	`putSet(byte tag, DerEncoder[] set)`	NSCP : Like putOrderSetOf, except not sorted.
`void`	`putSet(DerValue[] set)`	Marshals the contents of a set on the output stream without ordering the elements.
`void`	`putStringType(byte tag, java.lang.String s)`
`void`	`putTag(byte tagClass, boolean form, byte val)`	Put the tag of the attribute in the stream.
`void`	`putUnalignedBitString(boolean[] bitString)`	Marshals a DER bit string on the output stream.
`void`	`putUnalignedBitString(byte[] bitString)`	Marshals a DER bit string on the output stream.
`void`	`putUnalignedBitString(BitArray ba)`	Marshals a DER bit string on the output stream.
`void`	`putUnsignedInteger(byte[] integerBytes)`	Marshals a DER unsigned integer on the output stream.
`void`	`putUTCTime(java.util.Date d)`	Marshals a DER UTC time/date value.
`void`	`putUTF8String(java.lang.String s)`
`void`	`putVisibleString(java.lang.String s)`
`void`	`write(byte tag, byte[] buf)`	Writes tagged, pre-marshaled data.
`void`	`write(byte tag, DerOutputStream out)`	Writes tagged data using buffer-to-buffer copy.
`void`	`writeImplicit(byte tag, DerOutputStream value)`	Writes implicitly tagged data using buffer-to-buffer copy.

Methods inherited from class java.io.ByteArrayOutputStream
close, reset, size, toByteArray, toString, toString, toString, toString, write, write, writeBytes, writeTo

Methods inherited from class java.io.OutputStream
flush, nullOutputStream, write

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

- Constructor Detail
  - DerOutputStream
```
public DerOutputStream(int size)
```
    Construct an DER output stream.
    
    Parameters:
    
    size - how large a buffer to preallocate.
  - DerOutputStream
```
public DerOutputStream()
```
    Construct an DER output stream.
- Method Detail
  - write
```
public void write(byte tag,
                  byte[] buf)
           throws java.io.IOException
```
    Writes tagged, pre-marshaled data. This calcuates and encodes the length, so that the output data is the standard triple of { tag, length, data } used by all DER values.
    
    Parameters:
    
    tag - the DER value tag for the data, such as DerValue.tag_Sequence
    
    buf - buffered data, which must be DER-encoded
    
    Throws:
    
    java.io.IOException
  - write
```
public void write(byte tag,
                  DerOutputStream out)
           throws java.io.IOException
```
    Writes tagged data using buffer-to-buffer copy. As above, this writes a standard DER record. This is often used when efficiently encapsulating values in sequences.
    
    Parameters:
    
    tag - the DER value tag for the data, such as DerValue.tag_Sequence
    
    out - buffered data
    
    Throws:
    
    java.io.IOException
  - writeImplicit
```
public void writeImplicit(byte tag,
                          DerOutputStream value)
                   throws java.io.IOException
```
    Writes implicitly tagged data using buffer-to-buffer copy. As above, this writes a standard DER record. This is often used when efficiently encapsulating implicitly tagged values.
    Parameters:
    
    tag - the DER value of the context-specific tag that replaces original tag of the value in the output , such as in
    <field> [N] IMPLICIT <type>
    For example, FooLength [1] IMPLICIT INTEGER, with value=4; would be encoded as "81 01 04" whereas in explicit tagging it would be encoded as "A1 03 02 01 04". Notice that the tag is A1 and not 81, this is because with explicit tagging the form is always constructed.
    
    value - original value being implicitly tagged
    
    Throws:
    
    java.io.IOException
  - putDerValue
```
public void putDerValue(DerValue val)
                 throws java.io.IOException
```
    Marshals pre-encoded DER value onto the output stream.
    
    Throws:
    
    java.io.IOException
  - putBoolean
```
public void putBoolean(boolean val)
                throws java.io.IOException
```
    Marshals a DER boolean on the output stream.
    
    Throws:
    
    java.io.IOException
  - putInteger
```
public void putInteger(BigInt i)
                throws java.io.IOException
```
    Marshals a DER unsigned integer on the output stream.
    
    Throws:
    
    java.io.IOException
  - putUnsignedInteger
```
public void putUnsignedInteger(byte[] integerBytes)
                        throws java.io.IOException
```
    Marshals a DER unsigned integer on the output stream.
    
    Throws:
    
    java.io.IOException
  - putEnumerated
```
public void putEnumerated(int i)
                   throws java.io.IOException
```
    Marshals a DER enumerated value on the output stream.
    
    Throws:
    
    java.io.IOException
  - putBitString
```
public void putBitString(byte[] bits)
                  throws java.io.IOException
```
    Marshals a DER bit string on the output stream. The bit string must be byte-aligned.
    
    Parameters:
    
    bits - the bit string, MSB first
    
    Throws:
    
    java.io.IOException
  - putUnalignedBitString
```
public void putUnalignedBitString(BitArray ba)
                           throws java.io.IOException
```
    Marshals a DER bit string on the output stream. The bit strings need not be byte-aligned.
    
    Parameters:
    
    ba - the bit string, MSB first
    
    Throws:
    
    java.io.IOException
  - putUnalignedBitString
```
public void putUnalignedBitString(byte[] bitString)
                           throws java.io.IOException
```
    Marshals a DER bit string on the output stream. All trailing 0 bits will be stripped off in accordance with DER encoding.
    
    Parameters:
    
    bitString - the bit string, MSB first
    
    Throws:
    
    java.io.IOException
  - putUnalignedBitString
```
public void putUnalignedBitString(boolean[] bitString)
                           throws java.io.IOException
```
    Marshals a DER bit string on the output stream. All trailing 0 bits will be stripped off in accordance with DER encoding.
    
    Parameters:
    
    bitString - the bit string as an array of booleans.
    
    Throws:
    
    java.io.IOException
  - putOctetString
```
public void putOctetString(byte[] octets)
                    throws java.io.IOException
```
    DER-encodes an ASN.1 OCTET STRING value on the output stream.
    
    Parameters:
    
    octets - the octet string
    
    Throws:
    
    java.io.IOException
  - putNull
```
public void putNull()
             throws java.io.IOException
```
    Marshals a DER "null" value on the output stream. These are often used to indicate optional values which have been omitted.
    
    Throws:
    
    java.io.IOException
  - putOID
```
public void putOID(ObjectIdentifier oid)
            throws java.io.IOException
```
    Marshals an object identifier (OID) on the output stream. Corresponds to the ASN.1 "OBJECT IDENTIFIER" construct.
    
    Throws:
    
    java.io.IOException
  - putSequence
```
public void putSequence(DerValue[] seq)
                 throws java.io.IOException
```
    Marshals a sequence on the output stream. This supports both the ASN.1 "SEQUENCE" (zero to N values) and "SEQUENCE OF" (one to N values) constructs.
    
    Throws:
    
    java.io.IOException
  - putSet
```
public void putSet(DerValue[] set)
            throws java.io.IOException
```
    Marshals the contents of a set on the output stream without ordering the elements. Ok for BER encoding, but not for DER encoding. For DER encoding, use orderedPutSet() or orderedPutSetOf().
    
    Throws:
    
    java.io.IOException
  - putSet
```
public void putSet(byte tag,
                   DerEncoder[] set)
            throws java.io.IOException
```
    NSCP : Like putOrderSetOf, except not sorted. This may defy DER encoding but is needed for compatibility with communicator.
    
    Throws:
    
    java.io.IOException
  - putOrderedSetOf
```
public void putOrderedSetOf(byte tag,
                            DerEncoder[] set)
                     throws java.io.IOException
```
    Marshals the contents of a set on the output stream. Sets are semantically unordered, but DER requires that encodings of set elements be sorted into ascending lexicographical order before being output. Hence sets with the same tags and elements have the same DER encoding. This method supports the ASN.1 "SET OF" construct, but not "SET", which uses a different order.
    
    Throws:
    
    java.io.IOException
  - putOrderedSet
```
public void putOrderedSet(byte tag,
                          DerEncoder[] set)
                   throws java.io.IOException
```
    Marshals the contents of a set on the output stream. Sets are semantically unordered, but DER requires that encodings of set elements be sorted into ascending tag order before being output. Hence sets with the same tags and elements have the same DER encoding. This method supports the ASN.1 "SET" construct, but not "SET OF", which uses a different order.
    
    Throws:
    
    java.io.IOException
  - putPrintableString
```
public void putPrintableString(java.lang.String s)
                        throws java.io.IOException
```
    Converts string to printable and writes to der output stream.
    
    Throws:
    
    java.io.IOException
  - putVisibleString
```
public void putVisibleString(java.lang.String s)
                      throws java.io.IOException
```
    Throws:
    
    java.io.IOException
  - putBMPString
```
public void putBMPString(java.lang.String s)
                  throws java.io.IOException
```
    Marshals a string which is consists of BMP (unicode) characters
    
    Throws:
    
    java.io.IOException
  - putGeneralString
```
public void putGeneralString(java.lang.String s)
                      throws java.io.IOException
```
    Throws:
    
    java.io.IOException
  - putIA5String
```
public void putIA5String(java.lang.String s)
                  throws java.io.IOException
```
    Marshals a string which is consists of IA5(ASCII) characters
    
    Throws:
    
    java.io.IOException
  - putUTF8String
```
public void putUTF8String(java.lang.String s)
                   throws java.io.IOException
```
    Throws:
    
    java.io.IOException
  - putStringType
```
public void putStringType(byte tag,
                          java.lang.String s)
                   throws java.io.IOException
```
    Throws:
    
    java.io.IOException
  - getDateBytes
```
public byte[] getDateBytes(java.util.Date d,
                           boolean UTC)
```
  - putUTCTime
```
public void putUTCTime(java.util.Date d)
                throws java.io.IOException
```
    Marshals a DER UTC time/date value.
    YYMMDDhhmmss{Z|+hhmm|-hhmm} ... emits only using Zulu time and with seconds (even if seconds=0) as per IETF-PKIX partI.
    
    Throws:
    
    java.io.IOException
  - putGeneralizedTime
```
public void putGeneralizedTime(java.util.Date d)
                        throws java.io.IOException
```
    Marshals a DER Generalized Time/date value.
    YYYYMMDDhhmmss{Z|+hhmm|-hhmm} ... emits only using Zulu time and with seconds (even if seconds=0) as per IETF-PKIX partI.
    
    Throws:
    
    java.io.IOException
  - putLength
```
public void putLength(int len)
               throws java.io.IOException
```
    Put the encoding of the length in the stream.
    
    Parameters:
    
    len - the length of the attribute.
    
    Throws:
    
    java.io.IOException - on writing errors.
  - putTag
```
public void putTag(byte tagClass,
                   boolean form,
                   byte val)
```
    Put the tag of the attribute in the stream.
    
    Parameters:
    
    tagClass - the tag class type, one of UNIVERSAL, CONTEXT, APPLICATION or PRIVATE
    
    form - if true, the value is constructed, otherwise it is primitive.
    
    val - the tag value
  - derEncode
```
public void derEncode(java.io.OutputStream out)
               throws java.io.IOException
```
    Write the current contents of this DerOutputStream to an OutputStream.
    
    Specified by:
    
    derEncode in interface DerEncoder
    
    Parameters:
    
    out - the stream on which the DER encoding is written.
    
    Throws:
    
    java.io.IOException - on output error.

Constructor	Description
`DerOutputStream()`	Construct an DER output stream.
`DerOutputStream(int size)`	Construct an DER output stream.

Class DerOutputStream

Field Summary

Fields inherited from class java.io.ByteArrayOutputStream

Constructor Summary

Method Summary

Methods inherited from class java.io.ByteArrayOutputStream

Methods inherited from class java.io.OutputStream

Methods inherited from class java.lang.Object

Constructor Detail

DerOutputStream

DerOutputStream

Method Detail

write

write

writeImplicit

putDerValue

putBoolean

putInteger

putUnsignedInteger

putEnumerated

putBitString

putUnalignedBitString

putUnalignedBitString

putUnalignedBitString

putOctetString

putNull

putOID

putSequence

putSet

putSet

putOrderedSetOf

putOrderedSet

putPrintableString

putVisibleString

putBMPString

putGeneralString

putIA5String

putUTF8String

putStringType

getDateBytes

putUTCTime

putGeneralizedTime

putLength

putTag

derEncode