1.\" $OpenBSD: PKCS12_newpass.3,v 1.2 2018/03/22 16:06:33 schwarze Exp $ 2.\" OpenSSL c95a8b4e May 5 14:26:26 2016 +0100 3.\" 4.\" This file was written by Jeffrey Walton <noloader@gmail.com>. 5.\" Copyright (c) 2016 The OpenSSL Project. All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in 16.\" the documentation and/or other materials provided with the 17.\" distribution. 18.\" 19.\" 3. All advertising materials mentioning features or use of this 20.\" software must display the following acknowledgment: 21.\" "This product includes software developed by the OpenSSL Project 22.\" for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 23.\" 24.\" 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 25.\" endorse or promote products derived from this software without 26.\" prior written permission. For written permission, please contact 27.\" openssl-core@openssl.org. 28.\" 29.\" 5. Products derived from this software may not be called "OpenSSL" 30.\" nor may "OpenSSL" appear in their names without prior written 31.\" permission of the OpenSSL Project. 32.\" 33.\" 6. Redistributions of any form whatsoever must retain the following 34.\" acknowledgment: 35.\" "This product includes software developed by the OpenSSL Project 36.\" for use in the OpenSSL Toolkit (http://www.openssl.org/)" 37.\" 38.\" THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 39.\" EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 40.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 41.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 42.\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 43.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 44.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 45.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 46.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 47.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 48.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 49.\" OF THE POSSIBILITY OF SUCH DAMAGE. 50.\" 51.Dd $Mdocdate: March 22 2018 $ 52.Dt PKCS12_NEWPASS 3 53.Os 54.Sh NAME 55.Nm PKCS12_newpass 56.Nd change the password of a PKCS#12 structure 57.Sh SYNOPSIS 58.In openssl/pkcs12.h 59.Ft int 60.Fo PKCS12_newpass 61.Fa "PKCS12 *p12" 62.Fa "const char *oldpass" 63.Fa "const char *newpass" 64.Fc 65.Sh DESCRIPTION 66.Fn PKCS12_newpass 67changes the password of a PKCS#12 structure. 68.Pp 69.Fa p12 70is a pointer to a PKCS#12 structure. 71.Fa oldpass 72is the existing password and 73.Fa newpass 74is the new password. 75.Pp 76If the PKCS#12 structure does not have a password, use the empty 77string 78.Qq \& 79for 80.Fa oldpass . 81Passing 82.Dv NULL 83for 84.Fa oldpass 85results in a 86.Fn PKCS12_newpass 87failure. 88.Pp 89If the wrong password is used for 90.Fa oldpass , 91the function will fail with a MAC verification error. 92In rare cases, the PKCS#12 structure does not contain a MAC: 93in this case it will usually fail with a decryption padding error. 94.Sh RETURN VALUES 95.Fn PKCS12_newpass 96returns 1 on success or 0 on failure. 97.Pp 98Applications can retrieve the most recent error from 99.Fn PKCS12_newpass 100with 101.Xr ERR_get_error 3 . 102.Sh EXAMPLES 103This example loads a PKCS#12 file, changes its password, 104and writes out the result to a new file. 105.Bd -literal 106#include <stdio.h> 107#include <stdlib.h> 108#include <openssl/pem.h> 109#include <openssl/err.h> 110#include <openssl/pkcs12.h> 111 112int main(int argc, char **argv) 113{ 114 FILE *fp; 115 PKCS12 *p12; 116 if (argc != 5) { 117 fprintf(stderr, 118 "Usage: pkread p12file password newpass opfile\en"); 119 return 1; 120 } 121 if ((fp = fopen(argv[1], "rb")) == NULL) { 122 fprintf(stderr, "Error opening file %s\en", argv[1]); 123 return 1; 124 } 125 p12 = d2i_PKCS12_fp(fp, NULL); 126 fclose(fp); 127 if (p12 == NULL) { 128 fprintf(stderr, "Error reading PKCS#12 file\en"); 129 ERR_print_errors_fp(stderr); 130 return 1; 131 } 132 if (PKCS12_newpass(p12, argv[2], argv[3]) == 0) { 133 fprintf(stderr, "Error changing password\en"); 134 ERR_print_errors_fp(stderr); 135 PKCS12_free(p12); 136 return 1; 137 } 138 if ((fp = fopen(argv[4], "wb")) == NULL) { 139 fprintf(stderr, "Error opening file %s\en", argv[4]); 140 PKCS12_free(p12); 141 return 1; 142 } 143 i2d_PKCS12_fp(fp, p12); 144 PKCS12_free(p12); 145 fclose(fp); 146 return 0; 147} 148.Ed 149.Sh SEE ALSO 150.Xr ERR_get_error 3 , 151.Xr PKCS12_create 3 152.Sh HISTORY 153.Fn PKCS12_newpass 154first appeared in OpenSSL 0.9.5 and has been available since 155.Ox 2.7 . 156.Sh BUGS 157The password format is a NUL terminated ASCII string which is 158converted to Unicode form internally. 159As a result, some passwords cannot be supplied to this function. 160