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<ul id="index">
  <li><a href="#NAME">NAME</a></li>
  <li><a href="#SYNOPSIS">SYNOPSIS</a></li>
  <li><a href="#DESCRIPTION">DESCRIPTION</a></li>
  <li><a href="#NOTES">NOTES</a></li>
  <li><a href="#RETURN-VALUES">RETURN VALUES</a></li>
  <li><a href="#EXAMPLES">EXAMPLES</a></li>
  <li><a href="#NOTES1">NOTES</a></li>
  <li><a href="#BUGS">BUGS</a></li>
  <li><a href="#SEE-ALSO">SEE ALSO</a></li>
  <li><a href="#COPYRIGHT">COPYRIGHT</a></li>
</ul>

<h1 id="NAME">NAME</h1>

<p>PKCS12_newpass - change the password of a PKCS12 structure</p>

<h1 id="SYNOPSIS">SYNOPSIS</h1>

<pre><code> #include &lt;openssl/pkcs12.h&gt;

 int PKCS12_newpass(PKCS12 *p12, const char *oldpass, const char *newpass);</code></pre>

<h1 id="DESCRIPTION">DESCRIPTION</h1>

<p>PKCS12_newpass() changes the password of a PKCS12 structure.</p>

<p><b>p12</b> is a pointer to a PKCS12 structure. <b>oldpass</b> is the existing password and <b>newpass</b> is the new password.</p>

<h1 id="NOTES">NOTES</h1>

<p>Each of <b>oldpass</b> and <b>newpass</b> is independently interpreted as a string in the UTF-8 encoding. If it is not valid UTF-8, it is assumed to be ISO8859-1 instead.</p>

<p>In particular, this means that passwords in the locale character set (or code page on Windows) must potentially be converted to UTF-8 before use. This may include passwords from local text files, or input from the terminal or command line. Refer to the documentation of <a href="../man3/UI_OpenSSL.html">UI_OpenSSL(3)</a>, for example.</p>

<h1 id="RETURN-VALUES">RETURN VALUES</h1>

<p>PKCS12_newpass() returns 1 on success or 0 on failure. Applications can retrieve the most recent error from PKCS12_newpass() with ERR_get_error().</p>

<h1 id="EXAMPLES">EXAMPLES</h1>

<p>This example loads a PKCS#12 file, changes its password and writes out the result to a new file.</p>

<pre><code> #include &lt;stdio.h&gt;
 #include &lt;stdlib.h&gt;
 #include &lt;openssl/pem.h&gt;
 #include &lt;openssl/err.h&gt;
 #include &lt;openssl/pkcs12.h&gt;

 int main(int argc, char **argv)
 {
     FILE *fp;
     PKCS12 *p12;

     if (argc != 5) {
         fprintf(stderr, &quot;Usage: pkread p12file password newpass opfile\n&quot;);
         return 1;
     }
     if ((fp = fopen(argv[1], &quot;rb&quot;)) == NULL) {
         fprintf(stderr, &quot;Error opening file %s\n&quot;, argv[1]);
         return 1;
     }
     p12 = d2i_PKCS12_fp(fp, NULL);
     fclose(fp);
     if (p12 == NULL) {
         fprintf(stderr, &quot;Error reading PKCS#12 file\n&quot;);
         ERR_print_errors_fp(stderr);
         return 1;
     }
     if (PKCS12_newpass(p12, argv[2], argv[3]) == 0) {
         fprintf(stderr, &quot;Error changing password\n&quot;);
         ERR_print_errors_fp(stderr);
         PKCS12_free(p12);
         return 1;
     }
     if ((fp = fopen(argv[4], &quot;wb&quot;)) == NULL) {
         fprintf(stderr, &quot;Error opening file %s\n&quot;, argv[4]);
         PKCS12_free(p12);
         return 1;
     }
     i2d_PKCS12_fp(fp, p12);
     PKCS12_free(p12);
     fclose(fp);
     return 0;
 }</code></pre>

<h1 id="NOTES1">NOTES</h1>

<p>If the PKCS#12 structure does not have a password, then you must use the empty string &quot;&quot; for <b>oldpass</b>. Using NULL for <b>oldpass</b> will result in a PKCS12_newpass() failure.</p>

<p>If the wrong password is used for <b>oldpass</b> then the function will fail, with a MAC verification error. In rare cases the PKCS12 structure does not contain a MAC: in this case it will usually fail with a decryption padding error.</p>

<h1 id="BUGS">BUGS</h1>

<p>The password format is a NULL terminated ASCII string which is converted to Unicode form internally. As a result some passwords cannot be supplied to this function.</p>

<h1 id="SEE-ALSO">SEE ALSO</h1>

<p><a href="../man3/PKCS12_create.html">PKCS12_create(3)</a>, <a href="../man3/ERR_get_error.html">ERR_get_error(3)</a>, <a href="../man7/passphrase-encoding.html">passphrase-encoding(7)</a></p>

<h1 id="COPYRIGHT">COPYRIGHT</h1>

<p>Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.</p>

<p>Licensed under the OpenSSL license (the &quot;License&quot;). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>


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