PKCS12_NEWPASS(3ossl) OpenSSL PKCS12_NEWPASS(3ossl)
NAME
PKCS12_newpass - change the password of a PKCS12 structure
SYNOPSIS
#include <openssl/pkcs12.h>
int PKCS12_newpass(PKCS12 *p12, const char *oldpass, const char *newpass);
DESCRIPTION
PKCS12_newpass(3) changes the password of a PKCS12 structure.
p12 is a pointer to a PKCS12 structure. oldpass is the existing
password and newpass is the new password.
Each of oldpass and newpass 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.
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
UI_OpenSSL(3), for example.
If the PKCS#12 structure does not have a password, then you must use
the empty string "" for oldpass. Using NULL for oldpass will result in
a PKCS12_newpass(3) failure.
If the wrong password is used for oldpass 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.
RETURN VALUES
PKCS12_newpass(3) returns 1 on success or 0 on failure. Applications can
retrieve the most recent error from PKCS12_newpass(3) with
ERR_get_error().
EXAMPLES
This example loads a PKCS#12 file, changes its password and writes out
the result to a new file.
#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;
}
BUGS
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.
SEE ALSO
PKCS12_create(3), ERR_get_error(3), passphrase-encoding(7)
COPYRIGHT
Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (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
<https://www.openssl.org/source/license.html>.
3.3.2 2024-09-04 PKCS12_NEWPASS(3ossl)
openssl 3.3.2 - Generated Thu Sep 19 10:37:38 CDT 2024