Package org.apache.sshd.common.config.keys.loader.openssh.kdf

Class BCryptKdfOptions

java.lang.Object

org.apache.sshd.common.config.keys.loader.openssh.kdf.BCryptKdfOptions

All Implemented Interfaces:

OpenSSHKdfOptions, OpenSSHKeyDecryptor, NamedResource

public class BCryptKdfOptions
extends java.lang.Object
implements OpenSSHKdfOptions

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	BCryptKdfOptions.BCryptBadRoundsException

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_MAX_ROUNDS	Various discussions on the net seem to indicate that 64 is the value at which many computers seem to slow down noticeably, so we are rather generous here.
private static java.util.concurrent.atomic.AtomicInteger	MAX_ROUNDS_HOLDER
static java.lang.String	NAME
private int	numRounds
private byte[]	salt

Fields inherited from interface org.apache.sshd.common.NamedResource

BY_NAME_COMPARATOR, NAME_EXTRACTOR

Fields inherited from interface org.apache.sshd.common.config.keys.loader.openssh.OpenSSHKdfOptions

IS_NONE_KDF, MAX_KDF_NAME_LENGTH, MAX_KDF_OPTIONS_SIZE, NONE_KDF

Constructor Summary

Constructors

Constructor	Description
BCryptKdfOptions()

Method Summary

Modifier and Type	Method	Description
protected void	bcryptKdf(byte[] password, byte[] output)
byte[]	decodePrivateKeyBytes(SessionContext session, NamedResource resourceKey, java.lang.String cipherName, byte[] privateDataBytes, java.lang.String password)
boolean	equals(java.lang.Object obj)
static int	getMaxAllowedRounds()
java.lang.String	getName()
int	getNumRounds()
byte[]	getSalt()
int	hashCode()
protected void	initialize(java.io.InputStream stream, int maxSaltSize)
void	initialize(java.lang.String name, byte[] kdfOptions)
boolean	isEncrypted()
static void	setMaxAllowedRounds(int value)
void	setNumRounds(int numRounds)
void	setSalt(byte[] salt)
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

NAME

public static final java.lang.String NAME

See Also:

Constant Field Values

DEFAULT_MAX_ROUNDS

public static final int DEFAULT_MAX_ROUNDS

Various discussions on the net seem to indicate that 64 is the value at which many computers seem to slow down noticeably, so we are rather generous here. The default value (unless overridden by the -a parameter to the ssh-keygen command) is usually 16.

See Also:

Constant Field Values

MAX_ROUNDS_HOLDER

private static final java.util.concurrent.atomic.AtomicInteger MAX_ROUNDS_HOLDER

salt

private byte[] salt

numRounds

private int numRounds

Constructor Detail

BCryptKdfOptions

public BCryptKdfOptions()

Method Detail

initialize

public void initialize(java.lang.String name,
                       byte[] kdfOptions)
                throws java.io.IOException

Specified by:

initialize in interface OpenSSHKdfOptions

Throws:

java.io.IOException

initialize

protected void initialize(java.io.InputStream stream,
                          int maxSaltSize)
                   throws java.io.IOException

Throws:

java.io.IOException

isEncrypted

public boolean isEncrypted()

Specified by:

isEncrypted in interface OpenSSHKeyDecryptor

decodePrivateKeyBytes

public byte[] decodePrivateKeyBytes(SessionContext session,
                                    NamedResource resourceKey,
                                    java.lang.String cipherName,
                                    byte[] privateDataBytes,
                                    java.lang.String password)
                             throws java.io.IOException,
                                    java.security.GeneralSecurityException

Specified by:

decodePrivateKeyBytes in interface OpenSSHKeyDecryptor

Throws:

java.io.IOException

java.security.GeneralSecurityException

bcryptKdf

protected void bcryptKdf(byte[] password,
                         byte[] output)
                  throws java.io.IOException,
                         java.security.GeneralSecurityException

Throws:

java.io.IOException

java.security.GeneralSecurityException

getName

public final java.lang.String getName()

Specified by:

getName in interface NamedResource

Returns:

The resource name

getSalt

public byte[] getSalt()

setSalt

public void setSalt(byte[] salt)

getNumRounds

public int getNumRounds()

setNumRounds

public void setNumRounds(int numRounds)

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getMaxAllowedRounds

public static int getMaxAllowedRounds()

setMaxAllowedRounds

public static void setMaxAllowedRounds(int value)