Package com.healthmarketscience.jackcess.crypt

Class AgileEncryptionConfig

java.lang.Object

com.healthmarketscience.jackcess.crypt.AgileEncryptionConfig

public class AgileEncryptionConfig
extends Object

The algorithms agile encryption is written with.

Agile carries its parameters in the file, so a reader honours whatever it finds, but ms access writes only two combinations and there is no evidence it opens any other. OFFICE_2010 and OFFICE_2013 are those two, measured from files ms access wrote. The enums below hold what has been verified rather than everything the format allows, so a configuration built by hand cannot name an algorithm which has never been tested.

The block size and the hash size are not settable, because each follows from the algorithm chosen. A descriptor which disagrees with itself parses and then fails to decrypt, so the file would look written and only ms access would say otherwise.

Author:

James Ahlborn

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AgileEncryptionConfig.Chaining	The chaining modes which can be written.
static class	AgileEncryptionConfig.Cipher	The ciphers which can be written, with the name the descriptor uses.
static class	AgileEncryptionConfig.Hash	The hashes which can be written, with the length each produces.

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_SALT_SIZE	the salt size ms access writes in both of its profiles
static int	DEFAULT_SPIN_COUNT	the spin count ms access writes in both of its profiles
static AgileEncryptionConfig	OFFICE_2010	what ms access writes by default, and still writes today
static AgileEncryptionConfig	OFFICE_2013	the stronger profile ms access 2013 writes

Constructor Summary

Constructors

Constructor	Description
AgileEncryptionConfig(AgileEncryptionConfig.Cipher cipher, AgileEncryptionConfig.Chaining chaining, int keyBits, AgileEncryptionConfig.Hash hash)	Uses the spin count and the salt size ms access writes, which are the same in both of its profiles.
AgileEncryptionConfig(AgileEncryptionConfig.Cipher cipher, AgileEncryptionConfig.Chaining chaining, int keyBits, AgileEncryptionConfig.Hash hash, int spinCount, int saltSize)

Method Summary

Modifier and Type	Method	Description
int	getBlockSize()	Returns the cipher block size, which follows from the cipher.
AgileEncryptionConfig.Chaining	getChaining()
AgileEncryptionConfig.Cipher	getCipher()
AgileEncryptionConfig.Hash	getHash()
int	getHashSize()	Returns the hash length, which follows from the hash.
int	getKeyBits()
int	getSaltSize()
int	getSpinCount()
String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

DEFAULT_SPIN_COUNT

public static final int DEFAULT_SPIN_COUNT

the spin count ms access writes in both of its profiles

See Also:

Constant Field Values

DEFAULT_SALT_SIZE

public static final int DEFAULT_SALT_SIZE

the salt size ms access writes in both of its profiles

See Also:

Constant Field Values

OFFICE_2010

public static final AgileEncryptionConfig OFFICE_2010

what ms access writes by default, and still writes today

OFFICE_2013

public static final AgileEncryptionConfig OFFICE_2013

the stronger profile ms access 2013 writes

Constructor Detail

AgileEncryptionConfig

public AgileEncryptionConfig(AgileEncryptionConfig.Cipher cipher,
                             AgileEncryptionConfig.Chaining chaining,
                             int keyBits,
                             AgileEncryptionConfig.Hash hash)

Uses the spin count and the salt size ms access writes, which are the same in both of its profiles.

AgileEncryptionConfig

public AgileEncryptionConfig(AgileEncryptionConfig.Cipher cipher,
                             AgileEncryptionConfig.Chaining chaining,
                             int keyBits,
                             AgileEncryptionConfig.Hash hash,
                             int spinCount,
                             int saltSize)

Method Detail

getCipher

public AgileEncryptionConfig.Cipher getCipher()

getChaining

public AgileEncryptionConfig.Chaining getChaining()

getKeyBits

public int getKeyBits()

getHash

public AgileEncryptionConfig.Hash getHash()

getSpinCount

public int getSpinCount()

getSaltSize

public int getSaltSize()

getBlockSize

public int getBlockSize()

Returns the cipher block size, which follows from the cipher.

getHashSize

public int getHashSize()

Returns the hash length, which follows from the hash.

toString

public String toString()

Overrides:

toString in class Object