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1.\" $OpenBSD: PKCS12_newpass.3,v 1.4 2019/06/14 13:59:32 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.
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50.\"
51.Dd $Mdocdate: June 14 2019 $
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
95Upon successful completion, 1 is returned;
96otherwise 0 is returned and an error code can be retrieved with
97.Xr ERR_get_error 3 .
98.Sh EXAMPLES
99This example loads a PKCS#12 file, changes its password,
100and writes out the result to a new file.
101.Bd -literal
102#include <stdio.h>
103#include <stdlib.h>
104#include <openssl/pem.h>
105#include <openssl/err.h>
106#include <openssl/pkcs12.h>
107
108int main(int argc, char **argv)
109{
110 FILE *fp;
111 PKCS12 *p12;
112 if (argc != 5) {
113 fprintf(stderr,
114 "Usage: pkread p12file password newpass opfile\en");
115 return 1;
116 }
117 if ((fp = fopen(argv[1], "rb")) == NULL) {
118 fprintf(stderr, "Error opening file %s\en", argv[1]);
119 return 1;
120 }
121 p12 = d2i_PKCS12_fp(fp, NULL);
122 fclose(fp);
123 if (p12 == NULL) {
124 fprintf(stderr, "Error reading PKCS#12 file\en");
125 ERR_print_errors_fp(stderr);
126 return 1;
127 }
128 if (PKCS12_newpass(p12, argv[2], argv[3]) == 0) {
129 fprintf(stderr, "Error changing password\en");
130 ERR_print_errors_fp(stderr);
131 PKCS12_free(p12);
132 return 1;
133 }
134 if ((fp = fopen(argv[4], "wb")) == NULL) {
135 fprintf(stderr, "Error opening file %s\en", argv[4]);
136 PKCS12_free(p12);
137 return 1;
138 }
139 i2d_PKCS12_fp(fp, p12);
140 PKCS12_free(p12);
141 fclose(fp);
142 return 0;
143}
144.Ed
145.Sh SEE ALSO
146.Xr PKCS12_create 3 ,
147.Xr PKCS12_new 3
148.Sh HISTORY
149.Fn PKCS12_newpass
150first appeared in OpenSSL 0.9.5 and has been available since
151.Ox 2.7 .
152.Sh BUGS
153The password format is a NUL terminated ASCII string which is
154converted to Unicode form internally.
155As a result, some passwords cannot be supplied to this function.
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-12-23 13:35:51 +0000