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89 lines
4.6 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 4//EN">
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<HTML><HEAD>
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<TITLE>Administration Reference</TITLE>
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<!-- Workbench Version (AIX) on 3 Oct 2000 at 16:18:30 -->
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<META HTTP-EQUIV="updated" CONTENT="Tue, 03 Oct 2000 16:18:29">
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<META HTTP-EQUIV="review" CONTENT="Wed, 03 Oct 2001 16:18:29">
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<A NAME="Top_Of_Page"></A>
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<H1>Administration Reference</H1>
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<HR><P ALIGN="center"> <A HREF="../index.htm"><IMG SRC="../books.gif" BORDER="0" ALT="[Return to Library]"></A> <A HREF="auarf002.htm#ToC"><IMG SRC="../toc.gif" BORDER="0" ALT="[Contents]"></A> <A HREF="auarf202.htm"><IMG SRC="../prev.gif" BORDER="0" ALT="[Previous Topic]"></A> <A HREF="#Bot_Of_Page"><IMG SRC="../bot.gif" BORDER="0" ALT="[Bottom of Topic]"></A> <A HREF="auarf204.htm"><IMG SRC="../next.gif" BORDER="0" ALT="[Next Topic]"></A> <A HREF="auarf284.htm#HDRINDEX"><IMG SRC="../index.gif" BORDER="0" ALT="[Index]"></A> <P>
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<P>
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<H2><A NAME="HDRKPWVALID" HREF="auarf002.htm#ToC_217">kpwvalid</A></H2>
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<A NAME="IDX5194"></A>
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<A NAME="IDX5195"></A>
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<A NAME="IDX5196"></A>
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<P><STRONG>Purpose</STRONG>
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<P>Checks quality of new password
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<P><STRONG>Description</STRONG>
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<P>The <B>kpwvalid</B> command checks the quality of a new password passed
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to it from the <B>kpasswd</B> or <B>kas setpassword</B>
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command. It is optional. If it exists, it must reside in the
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same AFS directory as the binaries for the <B>kpasswd</B> and
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<B>kas</B> command suites (create a symbolic link from the client
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machine's local disk to this directory). The directory's ACL
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must extend the <B>a</B> (<B>administer</B>) and <B>w</B>
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(<B>write</B>) permissions to the <B>system:administrators</B>
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group only. These requirements prevent unauthorized users from
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substituting a spurious <B>kpwvalid</B> binary.
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<P>The AFS distribution includes an example <B>kpwvalid</B> program that
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checks that the password is at least eight characters long; the code for
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it appears in the following <B>Examples</B> section.
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<P>The script or program must accept a sequence of password strings, one per
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line, on the standard input stream. The first is the current password
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and is ignored. Each subsequent string is a candidate password to be
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checked. The program must write the following to the standard output
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stream for each one:
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<UL>
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<P><LI><TT>0</TT> (zero) and a newline character to indicate that the password
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is acceptable
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<P><LI>A non-zero decimal number and a newline character to indicate that the
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password is not acceptable
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</UL>
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<P>Further, it must write any error messages only to the standard error
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stream, not to the standard output stream.
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<P><STRONG>Examples</STRONG>
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<P>The following example program, included in the AFS distribution, verifies
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that the requested password includes eight or more characters.
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<PRE> #include <stdio.h>
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/* prints 0 if the password is long enough, otherwise non-zero */
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main()
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{
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char oldpassword[512];
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char password[512];
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if (fgets(oldpassword, 512, stdin))
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while (fgets(password, 512, stdin)) {
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if (strlen(password) > 8) { /* password includes a newline */
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fputs("0\n",stdout);
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fflush(stdout);
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}
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else {
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fputs("Passwords must contain at least 8 characters.\n",
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stderr);
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fputs("1\n",stdout);
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fflush(stdout);
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}
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return 0;
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}
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</PRE>
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<P><STRONG>Related Information</STRONG>
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<P><A HREF="auarf194.htm#HDRKAS_SETPASSWORD">kas setpassword</A>
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<P><A HREF="auarf202.htm#HDRKPASSWD">kpasswd</A>
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<P>
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<HR><P ALIGN="center"> <A HREF="../index.htm"><IMG SRC="../books.gif" BORDER="0" ALT="[Return to Library]"></A> <A HREF="auarf002.htm#ToC"><IMG SRC="../toc.gif" BORDER="0" ALT="[Contents]"></A> <A HREF="auarf202.htm"><IMG SRC="../prev.gif" BORDER="0" ALT="[Previous Topic]"></A> <A HREF="#Top_Of_Page"><IMG SRC="../top.gif" BORDER="0" ALT="[Top of Topic]"></A> <A HREF="auarf204.htm"><IMG SRC="../next.gif" BORDER="0" ALT="[Next Topic]"></A> <A HREF="auarf284.htm#HDRINDEX"><IMG SRC="../index.gif" BORDER="0" ALT="[Index]"></A> <P>
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<br>© <A HREF="http://www.ibm.com/">IBM Corporation 2000.</A> All Rights Reserved
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