org.apache.sshd.common.kex

Class DHGroupData

java.lang.Object

org.apache.sshd.common.kex.DHGroupData

public final class DHGroupData
extends Object

Simple class holding the data for DH group key exchanges.

Author:

Apache MINA SSHD Project

Method Summary

Modifier and Type	Method and Description
static byte[]	getG()
static byte[]	getOakleyGroupPrimeValue(String name)
static byte[]	getP1()
static byte[]	getP14()
static byte[]	getP15()
static byte[]	getP16()
static byte[]	getP17()
static byte[]	getP18()
static byte[]	parseOakleyGroupPrimeValue(String str) Parses the string assumed to contain a HEX-encoded Oakely prime value in big endian format
static byte[]	readOakleyGroupPrimeValue(BufferedReader br) Reads a HEX encoded prime value from a possibly multi-line input as follows:
static byte[]	readOakleyGroupPrimeValue(InputStream stream)
static byte[]	readOakleyGroupPrimeValue(Reader r)
static byte[]	readOakleyGroupPrimeValue(Stream<String> lines)
static byte[]	readOakleyGroupPrimeValue(String name) Reads a HEX-encoded Oakley prime value from an internal resource file

Methods inherited from class java.lang.Object

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

Method Detail

getG

public static byte[] getG()

getP1

public static byte[] getP1()

getP14

public static byte[] getP14()

getP15

public static byte[] getP15()

getP16

public static byte[] getP16()

getP17

public static byte[] getP17()

getP18

public static byte[] getP18()

getOakleyGroupPrimeValue

public static byte[] getOakleyGroupPrimeValue(String name)

Parameters:

name - The name of the resource file containing the prime value data

Returns:

The prime value bytes suitable for building a BigInteger

readOakleyGroupPrimeValue

public static byte[] readOakleyGroupPrimeValue(String name)
                                        throws IOError

Reads a HEX-encoded Oakley prime value from an internal resource file

Parameters:

name - The name of the resource file containing the prime value data. See org.apache.sshd.common.kex package for available primes

Returns:

The prime value bytes suitable for building a BigInteger

Throws:

IOError - If failed to access/read the required resource

See Also:

readOakleyGroupPrimeValue(InputStream)

readOakleyGroupPrimeValue

public static byte[] readOakleyGroupPrimeValue(InputStream stream)
                                        throws IOException

Throws:

IOException

readOakleyGroupPrimeValue

public static byte[] readOakleyGroupPrimeValue(Reader r)
                                        throws IOException

Throws:

IOException

readOakleyGroupPrimeValue

public static byte[] readOakleyGroupPrimeValue(BufferedReader br)
                                        throws IOException

Reads a HEX encoded prime value from a possibly multi-line input as follows:

• Lines are trimmed and all whitespaces removed.
• Empty lines (after trimming) are ignored.
• Lines beginning with "#" are ignored (assumed to be comments).
• Remaining lines are appended to one big string assumed to contain the HEX-encoded value

Parameters:

br - The BufferedReader to read the data from

Returns:

The prime value bytes suitable for building a BigInteger

Throws:

IOException - If invalid data or no encoded value found

See Also:

parseOakleyGroupPrimeValue

readOakleyGroupPrimeValue

public static byte[] readOakleyGroupPrimeValue(Stream<String> lines)
                                        throws NumberFormatException

Throws:

NumberFormatException

parseOakleyGroupPrimeValue

public static byte[] parseOakleyGroupPrimeValue(String str)
                                         throws NumberFormatException

Parses the string assumed to contain a HEX-encoded Oakely prime value in big endian format

Parameters:

str - The HEX-encoded string to decode - ignored if null/empty

Returns:

The prime value bytes suitable for building a BigInteger or empty array if no input

Throws:

NumberFormatException - if malformed encoded value