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java.lang.Object org.owasp.esapi.reference.DefaultRandomizer
public class DefaultRandomizer
Reference implementation of the Randomizer interface. This implementation builds on the JCE provider to provide a cryptographically strong source of entropy. The specific algorithm used is configurable in ESAPI.properties.
Randomizer
Method Summary | |
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static Randomizer |
getInstance()
|
boolean |
getRandomBoolean()
Returns a random boolean. |
byte[] |
getRandomBytes(int n)
Generates a specified number of random bytes. |
java.lang.String |
getRandomFilename(java.lang.String extension)
Returns an unguessable random filename with the specified extension. |
java.lang.String |
getRandomGUID()
Generates a random GUID. |
int |
getRandomInteger(int min,
int max)
Gets the random integer. |
long |
getRandomLong()
Gets the random long. |
float |
getRandomReal(float min,
float max)
Gets the random real. |
java.lang.String |
getRandomString(int length,
char[] characterSet)
Gets a random string of a desired length and character set. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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public static Randomizer getInstance()
public java.lang.String getRandomString(int length, char[] characterSet)
getRandomString
in interface Randomizer
length
- the length of the stringcharacterSet
- the set of characters to include in the created random string
public boolean getRandomBoolean()
getRandomBoolean
in interface Randomizer
public int getRandomInteger(int min, int max)
getRandomInteger
in interface Randomizer
min
- the minimum integer that will be returnedmax
- the maximum integer that will be returned
public long getRandomLong()
getRandomLong
in interface Randomizer
public float getRandomReal(float min, float max)
getRandomReal
in interface Randomizer
min
- the minimum real number that will be returnedmax
- the maximum real number that will be returned
public java.lang.String getRandomFilename(java.lang.String extension)
getRandomFilename
in interface Randomizer
extension
- extension to add to the random filename
public java.lang.String getRandomGUID() throws EncryptionException
For more information including algorithms used to create UUIDs, see the Internet-Draft UUIDs and GUIDs or the standards body definition at ISO/IEC 11578:1996.
getRandomGUID
in interface Randomizer
EncryptionException
- if hashing or encryption failspublic byte[] getRandomBytes(int n)
getRandomBytes
in interface Randomizer
n
- The requested number of random bytes.
n
random bytes are returned.
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