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PKCS12_newpass.html
<?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>PKCS12_newpass</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@localhost" /> </head> <body> <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 <openssl/pkcs12.h> 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 <stdio.h> #include <stdlib.h> #include <openssl/pem.h> #include <openssl/err.h> #include <openssl/pkcs12.h> int main(int argc, char **argv) { FILE *fp; PKCS12 *p12; if (argc != 5) { fprintf(stderr, "Usage: pkread p12file password newpass opfile\n"); return 1; } if ((fp = fopen(argv[1], "rb")) == NULL) { fprintf(stderr, "Error opening file %s\n", argv[1]); return 1; } p12 = d2i_PKCS12_fp(fp, NULL); fclose(fp); if (p12 == NULL) { fprintf(stderr, "Error reading PKCS#12 file\n"); ERR_print_errors_fp(stderr); return 1; } if (PKCS12_newpass(p12, argv[2], argv[3]) == 0) { fprintf(stderr, "Error changing password\n"); ERR_print_errors_fp(stderr); PKCS12_free(p12); return 1; } if ((fp = fopen(argv[4], "wb")) == NULL) { fprintf(stderr, "Error opening file %s\n", 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 "" 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 "License"). 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> </body> </html>
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