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.
The Crypt Password Storage Scheme component inherits from the Password Storage Scheme
A description of each property follows.
| Basic Properties: | Advanced Properties: |
|---|---|
| ↓ crypt-password-storage-encryption-algorithm | ↓ java-class |
| ↓ enabled |
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 |
| 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 |
| 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 |