Package org.opends.server.extensions

Class PBKDF2HmacSHA256PasswordStorageScheme

  • All Implemented Interfaces:
    ConfigurationChangeListener<PBKDF2PasswordStorageSchemeCfg>
    public class PBKDF2HmacSHA256PasswordStorageScheme
extends PasswordStorageScheme<PBKDF2PasswordStorageSchemeCfg>
    This class defines a Directory Server password storage scheme based on the PBKDF2 algorithm defined in RFC 2898. This is a one-way digest algorithm so there is no way to retrieve the original clear-text version of the password from the hashed value (although this means that it is not suitable for things that need the clear-text password like DIGEST-MD5). This implementation uses a configurable number of iterations.

    • Constructor Detail

      • PBKDF2HmacSHA256PasswordStorageScheme

        public PBKDF2HmacSHA256PasswordStorageScheme()

    • Method Detail

      • getStorageSchemeName

        public String getStorageSchemeName()
        Description copied from class: PasswordStorageScheme
        Retrieves the name of the password storage scheme provided by this handler.
        Returns:
        The name of the password storage scheme provided by this handler.

      • getAuthPasswordSchemeName

        public String getAuthPasswordSchemeName()
        Description copied from class: PasswordStorageScheme
        Retrieves the scheme name that should be used with this password storage scheme when it is used in the context of the authentication password syntax. This default implementation will return the same value as the getStorageSchemeName method.
        Returns:
        The scheme name that should be used with this password storage scheme when it is used in the context of the authentication password syntax.

      • isConfigurationChangeAcceptable

        public boolean isConfigurationChangeAcceptable​(PBKDF2PasswordStorageSchemeCfg configuration,
                                               List<org.forgerock.i18n.LocalizableMessage> unacceptableReasons)
        Description copied from interface: ConfigurationChangeListener
        Indicates whether the proposed change to the configuration is acceptable to this change listener.
        Specified by:
        isConfigurationChangeAcceptable in interface ConfigurationChangeListener<PBKDF2PasswordStorageSchemeCfg>
        Parameters:
        configuration - The new configuration containing the changes.
        unacceptableReasons - A list that can be used to hold messages about why the provided configuration is not acceptable.
        Returns:
        Returns true if the proposed change is acceptable, or false if it is not.

      • passwordMatches

        public boolean passwordMatches​(ByteSequence plaintextPassword,
                               ByteSequence storedPassword)
        Description copied from class: PasswordStorageScheme
        Indicates whether the provided plaintext password included in a bind request matches the given stored value. The provided stored value should not include the scheme name in curly braces.
        Specified by:
        passwordMatches in class PasswordStorageScheme<PBKDF2PasswordStorageSchemeCfg>
        Parameters:
        plaintextPassword - The plaintext password provided by the user as part of a simple bind attempt.
        storedPassword - The stored password to compare against the provided plaintext password.
        Returns:
        true if the provided plaintext password matches the provided stored password, or false if not.

      • supportsAuthPasswordSyntax

        public boolean supportsAuthPasswordSyntax()
        Description copied from class: PasswordStorageScheme
        Indicates whether this password storage scheme supports the ability to interact with values using the authentication password syntax defined in RFC 3112.
        Specified by:
        supportsAuthPasswordSyntax in class PasswordStorageScheme<PBKDF2PasswordStorageSchemeCfg>
        Returns:
        true if this password storage scheme supports the ability to interact with values using the authentication password syntax, or false if it does not.

      • encodeAuthPassword

        public ByteString encodeAuthPassword​(ByteSequence plaintext)
                              throws DirectoryException
        Description copied from class: PasswordStorageScheme
        Encodes the provided plaintext password for this storage scheme using the authentication password syntax defined in RFC 3112. Note that the provided plaintext password should not be altered in any way.
        Specified by:
        encodeAuthPassword in class PasswordStorageScheme<PBKDF2PasswordStorageSchemeCfg>
        Parameters:
        plaintext - The plaintext version of the password.
        Returns:
        The password that has been encoded in the authentication password syntax.
        Throws:
        DirectoryException - If a problem occurs while processing of if this storage scheme does not support the authentication password syntax.

      • authPasswordMatches

        public boolean authPasswordMatches​(ByteSequence plaintextPassword,
                                   String authInfo,
                                   String authValue)
        Description copied from class: PasswordStorageScheme
        Indicates whether the provided plaintext password matches the encoded password using the authentication password syntax with the given authInfo and authValue components.
        Specified by:
        authPasswordMatches in class PasswordStorageScheme<PBKDF2PasswordStorageSchemeCfg>
        Parameters:
        plaintextPassword - The plaintext password provided by the user.
        authInfo - The authInfo component of the password encoded in the authentication password syntax.
        authValue - The authValue component of the password encoded in the authentication password syntax.
        Returns:
        true if the provided plaintext password matches the encoded password according to the authentication password info syntax, or false if it does not or this storage scheme does not support the authentication password syntax.

      • getAuthPasswordPlaintextValue

        public ByteString getAuthPasswordPlaintextValue​(String authInfo,
                                                String authValue)
                                         throws DirectoryException
        Description copied from class: PasswordStorageScheme
        Retrieves the original plaintext value for the provided password stored in the authPassword syntax. Note that this should only be called if isReversible returns true.
        Specified by:
        getAuthPasswordPlaintextValue in class PasswordStorageScheme<PBKDF2PasswordStorageSchemeCfg>
        Parameters:
        authInfo - The authInfo component of the password encoded in the authentication password syntax.
        authValue - The authValue component of the password encoded in the authentication password syntax.
        Returns:
        The plaintext value for the provided stored password.
        Throws:
        DirectoryException - If it is not possible to obtain the plaintext value for the provided stored password, or if this storage scheme does not support the authPassword syntax..

      • isStorageSchemeSecure

        public boolean isStorageSchemeSecure()
        Description copied from class: PasswordStorageScheme
        Indicates whether this password storage scheme should be considered "secure". If the encoding used for this scheme does not obscure the value at all, or if it uses a method that is trivial to reverse (e.g., base64), then it should not be considered secure.

        This may be used to determine whether a password may be included in a set of search results, including the possibility of overriding access controls in the case that access controls would allow the password to be returned but the password is considered too insecure to reveal.
        Specified by:
        isStorageSchemeSecure in class PasswordStorageScheme<PBKDF2PasswordStorageSchemeCfg>
        Returns:
        false if it may be trivial to discover the original plain-text password from the encoded form, or true if the scheme offers sufficient protection that revealing the encoded password will not easily reveal the corresponding plain-text value.

      • encodeOffline

        public static String encodeOffline​(byte[] passwordBytes,
                                   String schemeName,
                                   String digestAlgo,
                                   int digestSize)
                            throws DirectoryException
        Generates an encoded password string from the given clear-text password. This method is primarily intended for use when it is necessary to generate a password with the server offline (e.g., when setting the initial root user password).
        Parameters:
        passwordBytes - The bytes that make up the clear-text password.
        schemeName - The storage scheme name
        digestAlgo - The digest algorithm name
        digestSize - The digest algorithm size in bytes
        Returns:
        The encoded password string, including the scheme name in curly braces.
        Throws:
        DirectoryException - If a problem occurs during processing.