org.apache.derby.iapi.sql.dictionary

Class PasswordHasher

java.lang.Object

org.apache.derby.iapi.sql.dictionary.PasswordHasher

public class PasswordHasher
extends java.lang.Object

This machine performs the hashing of Derby passwords.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ID_PATTERN_CONFIGURABLE_HASH_SCHEME Pattern that is prefixed to the stored password in the configurable hash authentication scheme.
static java.lang.String	ID_PATTERN_CONFIGURABLE_STRETCHED_SCHEME Pattern that is prefixed to the stored password in the configurable hash authentication scheme if key stretching has been applied.
static java.lang.String	ID_PATTERN_SHA1_SCHEME Pattern that is prefixed to the stored password in the SHA-1 authentication scheme.

Constructor Summary

Constructors

Constructor and Description
PasswordHasher(java.lang.String hashingScheme) Construct from a hashed BUILTIN password stored in the PropertyConglomerate or from a SYSUSERS.HASHINGSCHEME column.
PasswordHasher(java.lang.String messageDigestAlgorithm, byte[] salt, int iterations) Construct from pieces.

Method Summary

Modifier and Type	Method and Description
java.lang.String	encodeHashingScheme() Encodes the hashing algorithm in a string suitable for storing in SYSUSERS.HASHINGSCHEME.
java.lang.String	hashAndEncode(java.lang.String userName, java.lang.String password) Hash a username/password pair and return an encoded representation suitable for storing as a BUILTIN password value in the PropertyConglomerate.
java.lang.String	hashPasswordIntoString(java.lang.String userName, java.lang.String password) Produce a hashed password using a plaintext username and password.

Methods inherited from class java.lang.Object

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

Field Detail

ID_PATTERN_SHA1_SCHEME

public static final java.lang.String ID_PATTERN_SHA1_SCHEME

Pattern that is prefixed to the stored password in the SHA-1 authentication scheme.

See Also:

Constant Field Values

ID_PATTERN_CONFIGURABLE_HASH_SCHEME

public static final java.lang.String ID_PATTERN_CONFIGURABLE_HASH_SCHEME

Pattern that is prefixed to the stored password in the configurable hash authentication scheme.

See Also:

Constant Field Values

ID_PATTERN_CONFIGURABLE_STRETCHED_SCHEME

public static final java.lang.String ID_PATTERN_CONFIGURABLE_STRETCHED_SCHEME

Pattern that is prefixed to the stored password in the configurable hash authentication scheme if key stretching has been applied. This scheme extends the configurable hash scheme by adding a random salt and applying the hash function multiple times when generating the hashed token.

See Also:

Constant Field Values

Constructor Detail

PasswordHasher

public PasswordHasher(java.lang.String messageDigestAlgorithm,
                      byte[] salt,
                      int iterations)

Construct from pieces. Used for databases at rev level 10.6 or later.

PasswordHasher

public PasswordHasher(java.lang.String hashingScheme)

Construct from a hashed BUILTIN password stored in the PropertyConglomerate or from a SYSUSERS.HASHINGSCHEME column.

Method Detail

hashPasswordIntoString

public java.lang.String hashPasswordIntoString(java.lang.String userName,
                                               java.lang.String password)
                                        throws StandardException

Produce a hashed password using a plaintext username and password. Turn it into a printable string.

Throws:

StandardException

encodeHashingScheme

public java.lang.String encodeHashingScheme()

Encodes the hashing algorithm in a string suitable for storing in SYSUSERS.HASHINGSCHEME.

hashAndEncode

public java.lang.String hashAndEncode(java.lang.String userName,
                                      java.lang.String password)
                               throws StandardException

Hash a username/password pair and return an encoded representation suitable for storing as a BUILTIN password value in the PropertyConglomerate.

Throws:

StandardException