Package 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	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(String name)	Reads a HEX-encoded Oakley prime value from an internal resource file
static byte[]	readOakleyGroupPrimeValue(Stream<String> lines)

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