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UserAuthenticator (Apache Derby 10.6 API Documentation)
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org.apache.derby.authentication</FONT>
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Interface UserAuthenticator</H2>
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<DT><PRE>public interface <B>UserAuthenticator</B></DL>
</PRE>

<P>
The UserAuthenticator interface provides operations to authenticate
 a user's credentials in order to successfully connect to a database.
 
 Any user authentication schemes could be implemented using this interface
 and registered at start-up time.
 <p>
 If an application requires its own authentication scheme, then it can
 implement this interface and register as the authentication scheme
 that Derby should call upon connection requests to the system.
   See the dcoumentation for the property <I>derby.authentication.provider</I>
 <p>
 A typical example would be to implement user authentication using
 LDAP, Sun NIS+, or even Windows User Domain, using this interface.
 <p>
 <i>Note</i>: Additional connection attributes can be specified on the 
 database connection URL and/or Properties object on jdbc connection. Values
 for these attributes can be retrieved at runtime by the (specialized)
 authentication scheme to further help user authentication, if one needs
 additional info other than user, password, and database name.
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<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/derby/authentication/UserAuthenticator.html#authenticateUser(java.lang.String, java.lang.String, java.lang.String, java.util.Properties)">authenticateUser</A></B>(java.lang.String&nbsp;userName,
                 java.lang.String&nbsp;userPassword,
                 java.lang.String&nbsp;databaseName,
                 java.util.Properties&nbsp;info)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Authenticate a user's credentials.</TD>
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<A NAME="authenticateUser(java.lang.String, java.lang.String, java.lang.String, java.util.Properties)"><!-- --></A><H3>
authenticateUser</H3>
<PRE>
boolean <B>authenticateUser</B>(java.lang.String&nbsp;userName,
                         java.lang.String&nbsp;userPassword,
                         java.lang.String&nbsp;databaseName,
                         java.util.Properties&nbsp;info)
                         throws java.sql.SQLException</PRE>
<DL>
<DD>Authenticate a user's credentials.
 <BR>
 E.g. if connection url is 
 <code>jdbc:derby:testdb;user=Fred;password=ScT7dmM2</code>
 then the userName will be Fred and within the Derby user authorization 
 system, Fred becomes a case-insensitive authorization identifier and 
 is known as FRED
<BR>
 if connection url is 
 <code>jdbc:derby:testdb;user="Fred";password=ScT7dmM2</code>
 then the userName will be "Fred" and within the Derby user authorization
 system, Fred becomes a case-sensitive authorization identifier and is
 known as Fred
 <BR>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>userName</CODE> - The user's name for the connection request. May be 
                      null.  The user name is passed in as is from the 
                      connection request.
                      Derby will pass in the user name that is set on
                      connection request as is, without changing the 
                      casing and without removing the delimiter quotes 
                      if any.<DD><CODE>userPassword</CODE> - The user's password for the connection request. 
                      May be null.<DD><CODE>databaseName</CODE> - The database that the user wants to connect to.
                                                Will be null if this is system level authentication.<DD><CODE>info</CODE> - A Properties object that contains additional 
                      connection information, that can help to 
                      authenticate the user. It has properties of the 
                      'info' object passed as part of 
                      DriverManager.getConnection() call and any 
                      attributes set on the JDBC URL.
<DT><B>Returns:</B><DD>false if the connection request should be denied, true if the 
          connection request should proceed.  If false is returned the 
          connection attempt will receive a SQLException with SQL State 
          08004.
<DT><B>Throws:</B>
<DD><CODE>java.sql.SQLException</CODE> - An exception processing the request, 
            connection request will be denied.  The SQL exception will 
            be returned to the connection attempt.</DL>
</DD>
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