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oracle.security.crypto.asn1
Class ASN1Utils

java.lang.Object
oracle.security.crypto.asn1.ASN1Utils

public class ASN1Utils

extends java.lang.Object

ASN1 auxiliary routines for performing I/O and interconverting ASN.1 format to Java formats.

Field Summary

static int[]	attrTypeID ITU X.520 standard naming attributes arc.
static int[]	dds
static int[]	entrustID Entrust OID arc.
static int[]	iana IANA (Internet Assigned Numbers Authority) arc.
static int[]	netscapeID Netscape OID arc.
static int[]	nistAlgorithms NIST (National Institute of Standards and Technology) proposed algorithms arc.
static int[]	oiwAlgID NIST Open Systems Implementation Workshop (OIW) arc.
static int[]	phaosID Phaos OID arc.
static int[]	pkcsID PKCS series arc.
static int[]	rsaID RSA OID arc.
static int[]	xcmID ANSI X9.57 Certificate Management (aka "x9algorithms") arc.
static int[]	xecdsaID ANSI X9.62 ECDSA Object Identifier arc.
static int[]	xkaID ANSI X9.42 Key Agreement Object Identifier arc.

Method Summary

static ASN1Object	addImplicitTag(ASN1Object o, int tag) Returns the same object but with a different tag (and the context-specific tag class).
static int	getTag(int tagOctet) Returns the tag contained in the given BER tag octet.
static ASN1Object	inputASN1Object(byte[] encoding)
static ASN1Object	inputASN1Object(java.io.InputStream is)
static int	inputBase128(java.io.InputStream is)
static boolean	isPrefix(int[] a, int[] b) Return true if a is a prefix of b.
static int	lengthBase128(int n)
static int	lengthBase256(int n)
static void	outputBase128(int n, java.io.OutputStream os) Outputs an integer in base 128, with as few bytes as possible, most significant byte first, with each byte except the last having its most significant bit set to 1.
static void	outputEndOfContents(java.io.OutputStream os)
static void	outputHeader(java.io.OutputStream os, int tag, int tagClass) Outputs a constructed, indefinite-length header.
static void	outputLengthBytes(java.io.OutputStream os, int n) Outputs the length bytes for a definite-length encoding an object of the specified length.
static byte[]	toBytesBase128(int n)

Methods inherited from class java.lang.Object

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

Field Detail

rsaID

public static final int[] rsaID

RSA OID arc.

netscapeID

public static final int[] netscapeID

Netscape OID arc.

entrustID

public static final int[] entrustID

Entrust OID arc.

phaosID

public static final int[] phaosID

Phaos OID arc.

pkcsID

public static final int[] pkcsID

PKCS series arc.

attrTypeID

public static final int[] attrTypeID

ITU X.520 standard naming attributes arc.

oiwAlgID

public static final int[] oiwAlgID

NIST Open Systems Implementation Workshop (OIW) arc.

xcmID

public static final int[] xcmID

ANSI X9.57 Certificate Management (aka "x9algorithms") arc.

xkaID

public static final int[] xkaID

ANSI X9.42 Key Agreement Object Identifier arc.

xecdsaID

public static final int[] xecdsaID

ANSI X9.62 ECDSA Object Identifier arc.

iana

public static final int[] iana

IANA (Internet Assigned Numbers Authority) arc.

nistAlgorithms

public static final int[] nistAlgorithms

NIST (National Institute of Standards and Technology) proposed algorithms arc.

dds

public static final int[] dds

Method Detail

inputASN1Object

public static ASN1Object inputASN1Object(java.io.InputStream is)
                                  throws java.io.IOException

Throws:

java.io.IOException

inputASN1Object

public static ASN1Object inputASN1Object(byte[] encoding)
                                  throws java.io.IOException

Throws:

java.io.IOException

outputLengthBytes

public static void outputLengthBytes(java.io.OutputStream os,
                                     int n)
                              throws java.io.IOException

Outputs the length bytes for a definite-length encoding an object of the specified length.

Parameters:

os - the output stream

n - the length (must be nonnegative)

Throws:

java.io.IOException

outputBase128

public static void outputBase128(int n,
                                 java.io.OutputStream os)
                          throws java.io.IOException

Outputs an integer in base 128, with as few bytes as possible, most significant byte first, with each byte except the last having its most significant bit set to 1.

This is used for encoding high tag numbers, and for most of the components of an ASN.1 object identifier.

Parameters:

n - the value to output, which must be nonnegative

os - the output stream

Throws:

java.io.IOException

toBytesBase128

public static byte[] toBytesBase128(int n)

inputBase128

public static int inputBase128(java.io.InputStream is)
                        throws java.io.IOException

Throws:

java.io.IOException

lengthBase128

public static int lengthBase128(int n)

lengthBase256

public static int lengthBase256(int n)

isPrefix

public static boolean isPrefix(int[] a,
                               int[] b)

Return true if a is a prefix of b.

outputHeader

public static void outputHeader(java.io.OutputStream os,
                                int tag,
                                int tagClass)
                         throws java.io.IOException

Outputs a constructed, indefinite-length header.

Throws:

java.io.IOException

outputEndOfContents

public static void outputEndOfContents(java.io.OutputStream os)
                                throws java.io.IOException

Throws:

java.io.IOException

getTag

public static int getTag(int tagOctet)

Returns the tag contained in the given BER tag octet.

Returns:

the tag value, if tag is in the range 0..30, or -1 otherwise.

addImplicitTag

public static ASN1Object addImplicitTag(ASN1Object o,
                                        int tag)

Returns the same object but with a different tag (and the context-specific tag class).

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