Package org.keycloak.common.util

Class SecretGenerator

java.lang.Object

org.keycloak.common.util.SecretGenerator

public class SecretGenerator
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final char[]	ALPHANUM
static final char[]	DIGITS
static final int	SECRET_LENGTH_256_BITS
static final int	SECRET_LENGTH_384_BITS
static final int	SECRET_LENGTH_512_BITS
static final char[]	UPPER

Method Summary

Modifier and Type	Method	Description
static int	equivalentEntropySize(int byteLengthEntropy, int dstAlphabetLeng)	Returns the equivalent length for a destination alphabet to have the same entropy bits than a byte array random generated.
static int	equivalentEntropySize(int length, int srcAlphabetLength, int dstAlphabetLeng)	Returns the equivalent length for a destination alphabet to have the same entropy bits than another source alphabet.
String	generateSecureID()
UUID	generateSecureUUID()	Returns a pseudo-UUID where all bits are random to have a maximum entropy.
static SecretGenerator	getInstance()
byte[]	randomBytes()
byte[]	randomBytes(int length)
String	randomBytesHex(int length)
String	randomString()
String	randomString(int length)
String	randomString(int length, char[] symbols)

Methods inherited from class java.lang.Object

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

Field Details

SECRET_LENGTH_256_BITS

public static final int SECRET_LENGTH_256_BITS

See Also:

• Constant Field Values

SECRET_LENGTH_384_BITS

public static final int SECRET_LENGTH_384_BITS

See Also:

• Constant Field Values

SECRET_LENGTH_512_BITS

public static final int SECRET_LENGTH_512_BITS

See Also:

• Constant Field Values

UPPER

public static final char[] UPPER

DIGITS

public static final char[] DIGITS

ALPHANUM

public static final char[] ALPHANUM

Method Details

getInstance

public static SecretGenerator getInstance()

generateSecureID

public String generateSecureID()

randomString

public String randomString()

randomString

public String randomString(int length)

randomString

public String randomString(int length,
 char[] symbols)

randomBytes

public byte[] randomBytes()

randomBytes

public byte[] randomBytes(int length)

randomBytesHex

public String randomBytesHex(int length)

equivalentEntropySize

public static int equivalentEntropySize(int byteLengthEntropy,
 int dstAlphabetLeng)

Returns the equivalent length for a destination alphabet to have the same entropy bits than a byte array random generated.

Parameters:

byteLengthEntropy - The desired entropy in bytes

dstAlphabetLeng - The length of the destination alphabet

Returns:

The equivalent length in destination alphabet to have the same entropy bits

equivalentEntropySize

public static int equivalentEntropySize(int length,
 int srcAlphabetLength,
 int dstAlphabetLeng)

Returns the equivalent length for a destination alphabet to have the same entropy bits than another source alphabet.

Parameters:

length - The length of the string encoded in source alphabet

srcAlphabetLength - The length of the source alphabet

dstAlphabetLeng - The length of the destination alphabet

Returns:

The equivalent length (same entropy) in destination alphabet for a string of length in source alphabet

generateSecureUUID

public UUID generateSecureUUID()

Returns a pseudo-UUID where all bits are random to have a maximum entropy.

Returns:

UUID with all bits random