com.facebook.airlift.security.der

Class DerUtils

java.lang.Object

com.facebook.airlift.security.der.DerUtils

public final class DerUtils
extends Object

ASN.1 DER encoder methods necessary to process PEM files and to write a certificate signing request. NOTE: this API is only present for the two mentioned use cases, and is subject to change without warning.

Field Summary

Fields

Modifier and Type	Field and Description
static int	BIT_STRING_TAG
static int	BOOLEAN_TAG
static int	INTEGER_TAG
static int	NULL_TAG
static int	OBJECT_IDENTIFIER_TAG
static int	OCTET_STRING_TAG
static int	SEQUENCE_TAG
static int	UTC_TIME_TAG

Method Summary

Modifier and Type	Method and Description
static List<byte[]>	decodeSequence(byte[] sequence) Decodes a sequence of encoded values.
static byte[]	decodeSequenceOptionalElement(byte[] element) Decodes a optional element of a sequence.
static byte[]	encodeBitString(int padBits, byte[] value) Encodes a bit string padded with the specified number of bits.
static byte[]	encodeBooleanTrue() Encodes an integer.
static byte[]	encodeContextSpecificSequence(int tag, byte[]... encodedValues)
static byte[]	encodeContextSpecificTag(int tag, byte[] body)
static byte[]	encodeInteger(BigInteger value) Encodes an integer.
static byte[]	encodeInteger(long value) Encodes an integer.
static byte[]	encodeLength(int length) Encodes the length of a DER value.
static byte[]	encodeNull()
static byte[]	encodeOctetString(byte[] value) Encodes an octet string.
static byte[]	encodeOid(String oid)
static byte[]	encodeSequence(byte[]... encodedValues) Encodes a sequence of encoded values.
static byte[]	encodeTag(int tag, byte[] body)
static byte[]	encodeUtcTime(Instant value) Encodes an octet string.
static byte[]	encodeUtcTime(String value) Encodes an octet string.

Methods inherited from class java.lang.Object

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

Field Detail

SEQUENCE_TAG

public static final int SEQUENCE_TAG

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Constant Field Values

BOOLEAN_TAG

public static final int BOOLEAN_TAG

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Constant Field Values

INTEGER_TAG

public static final int INTEGER_TAG

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Constant Field Values

BIT_STRING_TAG

public static final int BIT_STRING_TAG

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Constant Field Values

OCTET_STRING_TAG

public static final int OCTET_STRING_TAG

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Constant Field Values

NULL_TAG

public static final int NULL_TAG

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Constant Field Values

OBJECT_IDENTIFIER_TAG

public static final int OBJECT_IDENTIFIER_TAG

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Constant Field Values

UTC_TIME_TAG

public static final int UTC_TIME_TAG

See Also:

Constant Field Values

Method Detail

encodeSequence

public static byte[] encodeSequence(byte[]... encodedValues)

Encodes a sequence of encoded values.

decodeSequence

public static List<byte[]> decodeSequence(byte[] sequence)

Decodes a sequence of encoded values.

decodeSequenceOptionalElement

public static byte[] decodeSequenceOptionalElement(byte[] element)

Decodes a optional element of a sequence.

encodeBitString

public static byte[] encodeBitString(int padBits,
                                     byte[] value)

Encodes a bit string padded with the specified number of bits. The encoding is a byte containing the padBits followed by the value bytes.

encodeBooleanTrue

public static byte[] encodeBooleanTrue()

Encodes an integer.

encodeInteger

public static byte[] encodeInteger(long value)

Encodes an integer.

encodeInteger

public static byte[] encodeInteger(BigInteger value)

Encodes an integer.

encodeOctetString

public static byte[] encodeOctetString(byte[] value)

Encodes an octet string.

encodeUtcTime

public static byte[] encodeUtcTime(String value)

Encodes an octet string.

encodeUtcTime

public static byte[] encodeUtcTime(Instant value)

Encodes an octet string.

encodeLength

public static byte[] encodeLength(int length)

Encodes the length of a DER value. The encoding of a 7bit value is simply the value. Values needing more than 7bits are encoded as a lead byte with the high bit set and containing the number of value bytes. Then the following bytes encode the length using the least number of bytes possible.

encodeOid

public static byte[] encodeOid(String oid)

encodeNull

public static byte[] encodeNull()

encodeTag

public static byte[] encodeTag(int tag,
                               byte[] body)

encodeContextSpecificTag

public static byte[] encodeContextSpecificTag(int tag,
                                              byte[] body)

encodeContextSpecificSequence

public static byte[] encodeContextSpecificSequence(int tag,
                                                   byte[]... encodedValues)