Package net.schmizz.sshj.userauth.keyprovider

Class PuTTYKeyFile

java.lang.Object

net.schmizz.sshj.userauth.keyprovider.BaseFileKeyProvider

net.schmizz.sshj.userauth.keyprovider.PuTTYKeyFile

All Implemented Interfaces:

FileKeyProvider, KeyProvider

public class PuTTYKeyFile
extends BaseFileKeyProvider

Sample PuTTY file format

 PuTTY-User-Key-File-2: ssh-rsa
 Encryption: none
 Comment: rsa-key-20080514
 Public-Lines: 4
 AAAAB3NzaC1yc2EAAAABJQAAAIEAiPVUpONjGeVrwgRPOqy3Ym6kF/f8bltnmjA2
 BMdAtaOpiD8A2ooqtLS5zWYuc0xkW0ogoKvORN+RF4JI+uNUlkxWxnzJM9JLpnvA
 HrMoVFaQ0cgDMIHtE1Ob1cGAhlNInPCRnGNJpBNcJ/OJye3yt7WqHP4SPCCLb6nL
 nmBUrLM=
 Private-Lines: 8
 AAAAgGtYgJzpktzyFjBIkSAmgeVdozVhgKmF6WsDMUID9HKwtU8cn83h6h7ug8qA
 hUWcvVxO201/vViTjWVz9ALph3uMnpJiuQaaNYIGztGJBRsBwmQW9738pUXcsUXZ
 79KJP01oHn6Wkrgk26DIOsz04QOBI6C8RumBO4+F1WdfueM9AAAAQQDmA4hcK8Bx
 nVtEpcF310mKD3nsbJqARdw5NV9kCxPnEsmy7Sy1L4Ob/nTIrynbc3MA9HQVJkUz
 7V0va5Pjm/T7AAAAQQCYbnG0UEekwk0LG1Hkxh1OrKMxCw2KWMN8ac3L0LVBg/Tk
 8EnB2oT45GGeJaw7KzdoOMFZz0iXLsVLNUjNn2mpAAAAQQCN6SEfWqiNzyc/w5n/
 lFVDHExfVUJp0wXv+kzZzylnw4fs00lC3k4PZDSsb+jYCMesnfJjhDgkUA0XPyo8
 Emdk
 Private-MAC: 50c45751d18d74c00fca395deb7b7695e3ed6f77
 

Version:

$Id:$

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PuTTYKeyFile.Factory

Field Summary

Fields

Modifier and Type	Field	Description
private final Map<String,String>	headers	For each line that looks like "Xyz: vvv", it will be stored in this map.
private static final String	KEY_DERIVATION_HEADER
private Integer	keyFileVersion
private final Map<String,String>	payload
private byte[]	privateKey
private byte[]	publicKey
private byte[]	verifyHmac

Fields inherited from class net.schmizz.sshj.userauth.keyprovider.BaseFileKeyProvider

kp, pwdf, resource, type

Constructor Summary

Constructors

Constructor	Description
PuTTYKeyFile()

Method Summary

Modifier and Type	Method	Description
private byte[]	decrypt(byte[] privateKey, char[] passphrase)	Decrypt private key
int	getKeyFileVersion()
KeyType	getType()	Key type
private void	initCipher(char[] passphrase, Cipher cipher)	Initialize Java Cipher for decryption using Secret Key derived from passphrase according to PuTTY Key Version
boolean	isEncrypted()
protected void	parseKeyPair()
private Mac	prepareVerifyMacV2(char[] passphrase)
private Mac	prepareVerifyMacV3()
protected KeyPair	readKeyPair()
private void	verify(Mac mac)	Verify the MAC (only required for v1/v2 keys.

Methods inherited from class net.schmizz.sshj.userauth.keyprovider.BaseFileKeyProvider

getPrivate, getPublic, init, init, init, init, init, init, init, init

Methods inherited from class java.lang.Object

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

Field Details

KEY_DERIVATION_HEADER

private static final String KEY_DERIVATION_HEADER

See Also:

• Constant Field Values

keyFileVersion

private Integer keyFileVersion

privateKey

private byte[] privateKey

publicKey

private byte[] publicKey

verifyHmac

private byte[] verifyHmac

payload

private final Map<String,String> payload

headers

private final Map<String,String> headers

For each line that looks like "Xyz: vvv", it will be stored in this map.

Constructor Details

PuTTYKeyFile

public PuTTYKeyFile()

Method Details

getType

public KeyType getType()
                throws IOException

Key type

Specified by:

getType in interface KeyProvider

Overrides:

getType in class BaseFileKeyProvider

Returns:

the KeyType.

Throws:

IOException - if there is an I/O error retrieving the key type

isEncrypted

public boolean isEncrypted()
                    throws IOException

Throws:

IOException

readKeyPair

protected KeyPair readKeyPair()
                       throws IOException

Specified by:

readKeyPair in class BaseFileKeyProvider

Throws:

IOException

parseKeyPair

protected void parseKeyPair()
                     throws IOException

Throws:

IOException

initCipher

private void initCipher(char[] passphrase,
 Cipher cipher)
                 throws InvalidAlgorithmParameterException,
InvalidKeyException

Initialize Java Cipher for decryption using Secret Key derived from passphrase according to PuTTY Key Version

Throws:

InvalidAlgorithmParameterException

InvalidKeyException

verify

private void verify(Mac mac)
             throws IOException

Verify the MAC (only required for v1/v2 keys. v3 keys are automatically verified as part of the decryption process.

Throws:

IOException

prepareVerifyMacV2

private Mac prepareVerifyMacV2(char[] passphrase)
                        throws IOException

Throws:

IOException

prepareVerifyMacV3

private Mac prepareVerifyMacV3()
                        throws IOException

Throws:

IOException

decrypt

private byte[] decrypt(byte[] privateKey,
 char[] passphrase)
                throws IOException

Decrypt private key

Parameters:

privateKey - the SSH private key to be decrypted

passphrase - To decrypt

Throws:

IOException

getKeyFileVersion

public int getKeyFileVersion()