at.favre.lib.crypto.bkdf

Interface Version

All Known Implementing Classes:

Version.Default

public interface Version

Encapsulates the information which defines a BKDF version, including code, HKDF version and bcrypt mode

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Version.Default
static class	Version.UnsupportedBkdfVersionException Thrown if a version code is provided which is not recognized or supported
static class	Version.Util Wrapper class for static util methods

Field Summary

Fields

Modifier and Type	Field and Description
static Version	HKDF_HMAC512 Using HKDF-HMAC-SHA512 and 23 byte bcrypt output
static Version	HKDF_HMAC512_BCRYPT_24_BYTE Using HKDF-HMAC-SHA512 and 24 byte bcrypt output
static int	MAX_BCRYPT_HASH_LENGTH_BYTE
static int	MIN_BCRYPT_HASH_LENGTH_BYTE
static List<Version>	VERSIONS List of supported Version

Method Summary

Modifier and Type	Method and Description
int	getHashByteLength() Gets the used bcrypt hash byte length.
at.favre.lib.crypto.HKDF	getHkdf() What HKDF version to use (ie.
byte	getVersionCode() The version code used to identify the configuration

Field Detail

MIN_BCRYPT_HASH_LENGTH_BYTE

static final int MIN_BCRYPT_HASH_LENGTH_BYTE

See Also:

Constant Field Values

MAX_BCRYPT_HASH_LENGTH_BYTE

static final int MAX_BCRYPT_HASH_LENGTH_BYTE

See Also:

Constant Field Values

HKDF_HMAC512

static final Version HKDF_HMAC512

Using HKDF-HMAC-SHA512 and 23 byte bcrypt output

HKDF_HMAC512_BCRYPT_24_BYTE

static final Version HKDF_HMAC512_BCRYPT_24_BYTE

Using HKDF-HMAC-SHA512 and 24 byte bcrypt output

VERSIONS

static final List<Version> VERSIONS

List of supported Version

Method Detail

getVersionCode

byte getVersionCode()

The version code used to identify the configuration

Returns:

as byte

getHkdf

at.favre.lib.crypto.HKDF getHkdf()

What HKDF version to use (ie. which mac implementation is used)

Returns:

HKDF instance

getHashByteLength

int getHashByteLength()

Gets the used bcrypt hash byte length. This is usually 23 or 24 bytes. Choose if you want to use a more compatible approach (using only 23 byte output from bcrypt) or a more correct approach (using the full 24 byte blowfish provides) of using the underlying bcrypt hash.

Returns:

length of the used bcrypt hash (23 or 24 byte)