136 lines
7.5 KiB
HTML
136 lines
7.5 KiB
HTML
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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="dc.language" scheme="rfc1766" content="en-us" />
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<meta name="dc.date" scheme="iso8601" content="2005-09-19" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="keywords" content="SET ENCRYPTION PASSWORD statement,
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SET ENCRYPTION PASSWORD, SQL statements" />
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<title>SET ENCRYPTION PASSWORD</title>
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<link rel="stylesheet" type="text/css" href="ibmidwb.css" />
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<link rel="stylesheet" type="text/css" href="ic.css" />
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</head>
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<body>
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<a id="Top_Of_Page" name="Top_Of_Page"></a><!-- Java sync-link -->
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<script language = "Javascript" src = "../rzahg/synch.js" type="text/javascript"></script>
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<a name="setep"></a>
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<h2 id="setep"><a href="rbafzmst02.htm#ToC_1306">SET ENCRYPTION PASSWORD</a></h2><a id="idx3150" name="idx3150"></a><a id="idx3151" name="idx3151"></a>
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<p>The SET ENCRYPTION PASSWORD statement sets the default password and hint
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that will be used by the encryption and decryption functions. The password
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is not associated with authentication and is only used for data encryption
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and decryption.</p>
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<a name="wq1759"></a>
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<h3 id="wq1759"><a href="rbafzmst02.htm#ToC_1307">Invocation</a></h3>
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<p>This statement can be embedded in an application program or issued interactively.
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It is an executable statement that can be dynamically prepared.</p>
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<a name="wq1760"></a>
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<h3 id="wq1760"><a href="rbafzmst02.htm#ToC_1308">Authorization</a></h3>
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<p>No authorization is required to execute this statement.</p>
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<a name="wq1761"></a>
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<h3 id="wq1761"><a href="rbafzmst02.htm#ToC_1309">Syntax</a></h3>
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<a href="rbafzmstsetep.htm#synsetep"><img src="c.gif" alt="Click to skip syntax diagram" /></a>
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<pre class="cgraphic"><span><img src="c.gif" alt="Read syntax diagram" longdesc="rbafzmstsyn383.htm"
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border="0" /></span><a href="#skipsyn-382"><img src="c.gif" alt="Skip visual syntax diagram"
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border="0" /></a> .-=-.
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>>-SET--ENCRYPTION PASSWORD--+---+------------------------------>
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>--+-<span class="italic">password-variable</span>--------+--------------------------------->
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'-<span class="italic">password-string-constant</span>-'
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>--+--------------------------------------------+--------------><
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| .-=-. |
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'-WITH HINT--+---+--+-<span class="italic">hint-variable</span>--------+-'
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'-<span class="italic">hint-string-constant</span>-'
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</pre>
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<a name="skipsyn-382" id="skipsyn-382"></a>
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<a name="synsetep"></a>
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<h3 id="synsetep"><a href="rbafzmst02.htm#ToC_1310">Description</a></h3>
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<dl class="parml">
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<dt class="bold"><var class="pv">password-variable</var></dt>
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<dd>Specifies a variable that contains an encryption password.
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<p>The variable:
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</p>
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<ul>
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<li>Must be a CHAR, VARCHAR, UTF-16 or UCS-2 GRAPHIC, or UTF-16 or UCS-2 VARGRAPHIC
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variable. The actual length of the contents of the variable must be between
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6 and 127 inclusive or must be an empty string. If an empty string is specified,
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the default encryption password is set to no value.</li>
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<li>Must not be the null value.</li>
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<li>All characters are case-sensitive and are not converted to uppercase characters.</li></ul>
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</dd>
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<dt class="bold"><var class="pv">password-string-constant</var></dt>
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<dd>A character constant. The length of the constant must be between 6 and
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127 inclusive or must be an empty string. If an empty string is specified,
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the default encryption password is set to no value. The literal form of the
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password is not allowed in static SQL or REXX.
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</dd>
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<dt class="bold">WITH HINT</dt>
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<dd>Indicates that a value is specified that will help data owners remember
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passwords (for example, 'Ocean' as a hint to remember 'Pacific'). If a hint
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value is specified, the hint is used as the default for encryption functions.
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The hint can subsequently be retrieved for an encrypted value using the GETHINT
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function. If this clause is not specified and a hint is not explicitly specified
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on the encryption function, no hint will be embedded in encrypted data result.
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<dl class="parml">
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<dt class="bold"><var class="pv">hint-variable</var></dt>
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<dd>Specifies a variable that contains an encryption password hint.
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<p>The variable: </p>
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<ul>
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<li>Must be a CHAR, VARCHAR, UTF-16 or UCS-2 GRAPHIC, or UTF-16 or UCS-2 VARGRAPHIC
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variable. The actual length of the contents of the variable must not be greater
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than 32. If an empty string is specified, the default encryption password
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hint is set to no value.</li>
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<li>Must not be the null value.</li>
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<li>All characters are case-sensitive and are not converted to uppercase characters.</li></ul>
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</dd>
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<dt class="bold"><var class="pv">hint-string-constant</var></dt>
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<dd>A character constant. The length of the constant must not be greater
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than 32. If an empty string is specified, the default encryption password
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hint is set to no value.
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</dd>
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</dl>
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</dd>
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</dl>
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<a name="wq1762"></a>
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<h3 id="wq1762"><a href="rbafzmst02.htm#ToC_1311">Notes</a></h3>
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<p><span class="bold">Password protection:</span> To prevent inadvertent access
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to the encryption password, do not specify <var class="pv">password-string-constant</var> in
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the source for a program, procedure, or function. Instead, use a variable.</p>
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<p>When connected to a remote relational database, the specified password
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itself is sent "in the clear". That is, the password itself is not encrypted.
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To protect the password in these cases, consider using a communications encryption
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mechanism such as IPSEC (or SSL if connecting between iSeries™ systems).</p>
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<p><span class="bold">Transaction considerations:</span> The SET ENCRYPTION PASSWORD
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statement is not a commitable operation. ROLLBACK has no effect on the default
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encryption password or default encryption password hint.</p>
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<p><span class="bold">Initial encryption password value:</span> The initial value
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of both the default encryption password and the default encryption password
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hint is the empty string ('').</p>
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<p><span class="bold">Encryption password scope:</span> The scope of the default
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encryption password and default encryption password hint is the activation
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group and connection.</p>
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<a name="wq1763"></a>
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<h3 id="wq1763"><a href="rbafzmst02.htm#ToC_1312">Example</a></h3>
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<p>Set the ENCRYPTION PASSWORD to the value in :hv1.</p>
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<pre class="xmp"><span class="bold">SET ENCRYPTION PASSWORD</span> :hv1</pre>
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<hr /><br />
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[ <a href="#Top_Of_Page">Top of Page</a> | <a href="rbafzsetdescr.htm">Previous Page</a> | <a href="rbafzmstsoption.htm">Next Page</a> | <a href="rbafzmst02.htm#wq1">Contents</a> |
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<a href="rbafzmstindex.htm#index">Index</a> ]
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<a id="Bot_Of_Page" name="Bot_Of_Page"></a>
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</body>
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</html>
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