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OpenDJ - Crypt Password Storage Scheme

Crypt Password Storage Scheme

The Crypt Password Storage Scheme provides a mechanism for encoding user passwords like Unix crypt does. Like on most Unix systems, the password may be encrypted using different algorithms, either Unix crypt, md5, sha256 or sha512.

This scheme contains only an implementation for the user password syntax, with a storage scheme name of "CRYPT". Like on most Unixes, the "CRYPT" storage scheme has different algorithms, the default being Unix crypt. Warning: even though Unix crypt is a one-way digest, it is very weak by today's standards. Only the first 8 characters in a password are used, and it only uses the bottom 7 bits of each character. It only supports a 12-bit salt (meaning that there are only 4096 possible ways to encode a given password), so it is vulnerable to dictionary attacks. You should therefore use this algorithm only in cases where an external application expects to retrieve the password and verify it outside of the directory, instead of by performing an LDAP bind.

Parent Component

The Crypt Password Storage Scheme component inherits from the Password Storage Scheme

Properties

A description of each property follows.


Basic Properties: Advanced Properties:
↓ crypt-password-storage-encryption-algorithm ↓ java-class
↓ enabled

Basic Properties

crypt-password-storage-encryption-algorithm

Description
Specifies the algorithm to use to encrypt new passwords. Select the crypt algorithm to use to encrypt new passwords. The value can either be "unix", which means the password is encrypted with the weak Unix crypt algorithm, or "md5" which means the password is encrypted with the BSD MD5 algorithm and has a $1$ prefix, or "sha256" which means the password is encrypted with the SHA256 algorithm and has a $5$ prefix, or "sha512" which means the password is encrypted with the SHA512 algorithm and has a $6$ prefix.
Default Value
unix
Allowed Values
md5 - New passwords are encrypted with the BSD MD5 algorithm.

sha256 - New passwords are encrypted with the Unix crypt SHA256 algorithm.

sha512 - New passwords are encrypted with the Unix crypt SHA512 algorithm.

unix - New passwords are encrypted with the Unix crypt algorithm. Passwords are truncated at 8 characters and the top bit of each character is ignored.


Multi-valued
No
Required
Yes
Admin Action Required
None
Advanced Property
No
Read-only
No

enabled

Description
Indicates whether the Password Storage Scheme is enabled for use.
Default Value
None
Allowed Values
true
false
Multi-valued
No
Required
Yes
Admin Action Required
None
Advanced Property
No
Read-only
No


Advanced Properties

java-class

Description
Specifies the fully-qualified name of the Java class that provides the Crypt Password Storage Scheme implementation.
Default Value
org.opends.server.extensions.CryptPasswordStorageScheme
Allowed Values
A java class that implements or extends the class(es) :
org.opends.server.api.PasswordStorageScheme
Multi-valued
No
Required
Yes
Admin Action Required
None
Advanced Property
Yes
Read-only
No