Class UnixCrypt
- java.lang.Object
-
- org.apache.commons.codec.digest.UnixCrypt
-
public class UnixCrypt extends java.lang.Object
Unix crypt(3) algorithm implementation.This class only implements the traditional 56 bit DES based algorithm. Please use DigestUtils.crypt() for a method that distinguishes between all the algorithms supported in the current glibc's crypt().
The Java implementation was taken from the JetSpeed Portal project (see org.apache.jetspeed.services.security.ldap.UnixCrypt).
This class is slightly incompatible if the given salt contains characters that are not part of the allowed range [a-zA-Z0-9./].
This class is immutable and thread-safe.
- Since:
- 1.7
-
-
Constructor Summary
Constructors Constructor Description UnixCrypt()
-
Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description private static int[]
body(int[] schedule, int eSwap0, int eSwap1)
private static int
byteToUnsigned(byte b)
static java.lang.String
crypt(byte[] original)
Generates a crypt(3) compatible hash using the DES algorithm.static java.lang.String
crypt(byte[] original, java.lang.String salt)
Generates a crypt(3) compatible hash using the DES algorithm.static java.lang.String
crypt(java.lang.String original)
Generates a crypt(3) compatible hash using the DES algorithm.static java.lang.String
crypt(java.lang.String original, java.lang.String salt)
Generates a crypt(3) compatible hash using the DES algorithm.private static int
dEncrypt(int el, int r, int s, int e0, int e1, int[] sArr)
private static int[]
desSetKey(byte[] key)
private static int
fourBytesToInt(byte[] b, int offset)
private static int
hPermOp(int a, int n, int m)
private static void
intToFourBytes(int iValue, byte[] b, int offset)
private static void
permOp(int a, int b, int n, int m, int[] results)
-
-
-
Method Detail
-
crypt
public static java.lang.String crypt(byte[] original)
Generates a crypt(3) compatible hash using the DES algorithm.A salt is generated for you using
ThreadLocalRandom
; for more secure salts consider usingSecureRandom
to generate your own salts and callingcrypt(byte[], String)
.- Parameters:
original
- plaintext password- Returns:
- a 13 character string starting with the salt string
-
crypt
public static java.lang.String crypt(byte[] original, java.lang.String salt)
Generates a crypt(3) compatible hash using the DES algorithm.Using unspecified characters as salt results incompatible hash values.
- Parameters:
original
- plaintext passwordsalt
- a two character string drawn from [a-zA-Z0-9./]. The salt may be null, in which case a salt is generated for you usingThreadLocalRandom
; for more secure salts consider usingSecureRandom
to generate your own salts.- Returns:
- a 13 character string starting with the salt string
- Throws:
java.lang.IllegalArgumentException
- if the salt does not match the allowed pattern
-
crypt
public static java.lang.String crypt(java.lang.String original)
Generates a crypt(3) compatible hash using the DES algorithm.A salt is generated for you using
ThreadLocalRandom
; for more secure salts consider usingSecureRandom
to generate your own salts and callingcrypt(String, String)
.- Parameters:
original
- plaintext password- Returns:
- a 13 character string starting with the salt string
-
crypt
public static java.lang.String crypt(java.lang.String original, java.lang.String salt)
Generates a crypt(3) compatible hash using the DES algorithm.- Parameters:
original
- plaintext passwordsalt
- a two character string drawn from [a-zA-Z0-9./]. The salt may be null, in which case a salt is generated for you usingThreadLocalRandom
; for more secure salts consider usingSecureRandom
to generate your own salts.- Returns:
- a 13 character string starting with the salt string
- Throws:
java.lang.IllegalArgumentException
- if the salt does not match the allowed pattern
-
body
private static int[] body(int[] schedule, int eSwap0, int eSwap1)
-
byteToUnsigned
private static int byteToUnsigned(byte b)
-
dEncrypt
private static int dEncrypt(int el, int r, int s, int e0, int e1, int[] sArr)
-
desSetKey
private static int[] desSetKey(byte[] key)
-
fourBytesToInt
private static int fourBytesToInt(byte[] b, int offset)
-
hPermOp
private static int hPermOp(int a, int n, int m)
-
intToFourBytes
private static void intToFourBytes(int iValue, byte[] b, int offset)
-
permOp
private static void permOp(int a, int b, int n, int m, int[] results)
-
-