1PKCS12_NEWPASS(3)                   OpenSSL                  PKCS12_NEWPASS(3)
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NAME

6       PKCS12_newpass - change the password of a PKCS12 structure
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SYNOPSIS

9        #include <openssl/pkcs12.h>
10
11        int PKCS12_newpass(PKCS12 *p12, const char *oldpass, const char *newpass);
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DESCRIPTION

14       PKCS12_newpass() changes the password of a PKCS12 structure.
15
16       p12 is a pointer to a PKCS12 structure. oldpass is the existing
17       password and newpass is the new password.
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NOTES

20       Each of oldpass and newpass is independently interpreted as a string in
21       the UTF-8 encoding. If it is not valid UTF-8, it is assumed to be
22       ISO8859-1 instead.
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24       In particular, this means that passwords in the locale character set
25       (or code page on Windows) must potentially be converted to UTF-8 before
26       use. This may include passwords from local text files, or input from
27       the terminal or command line. Refer to the documentation of
28       UI_OpenSSL(3), for example.
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RETURN VALUES

31       PKCS12_newpass() returns 1 on success or 0 on failure. Applications can
32       retrieve the most recent error from PKCS12_newpass() with
33       ERR_get_error().
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EXAMPLES

36       This example loads a PKCS#12 file, changes its password and writes out
37       the result to a new file.
38
39        #include <stdio.h>
40        #include <stdlib.h>
41        #include <openssl/pem.h>
42        #include <openssl/err.h>
43        #include <openssl/pkcs12.h>
44
45        int main(int argc, char **argv)
46        {
47            FILE *fp;
48            PKCS12 *p12;
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50            if (argc != 5) {
51                fprintf(stderr, "Usage: pkread p12file password newpass opfile\n");
52                return 1;
53            }
54            if ((fp = fopen(argv[1], "rb")) == NULL) {
55                fprintf(stderr, "Error opening file %s\n", argv[1]);
56                return 1;
57            }
58            p12 = d2i_PKCS12_fp(fp, NULL);
59            fclose(fp);
60            if (p12 == NULL) {
61                fprintf(stderr, "Error reading PKCS#12 file\n");
62                ERR_print_errors_fp(stderr);
63                return 1;
64            }
65            if (PKCS12_newpass(p12, argv[2], argv[3]) == 0) {
66                fprintf(stderr, "Error changing password\n");
67                ERR_print_errors_fp(stderr);
68                PKCS12_free(p12);
69                return 1;
70            }
71            if ((fp = fopen(argv[4], "wb")) == NULL) {
72                fprintf(stderr, "Error opening file %s\n", argv[4]);
73                PKCS12_free(p12);
74                return 1;
75            }
76            i2d_PKCS12_fp(fp, p12);
77            PKCS12_free(p12);
78            fclose(fp);
79            return 0;
80        }
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NOTES

83       If the PKCS#12 structure does not have a password, then you must use
84       the empty string "" for oldpass. Using NULL for oldpass will result in
85       a PKCS12_newpass() failure.
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87       If the wrong password is used for oldpass then the function will fail,
88       with a MAC verification error. In rare cases the PKCS12 structure does
89       not contain a MAC: in this case it will usually fail with a decryption
90       padding error.
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BUGS

93       The password format is a NULL terminated ASCII string which is
94       converted to Unicode form internally. As a result some passwords cannot
95       be supplied to this function.
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SEE ALSO

98       PKCS12_create(3), ERR_get_error(3), passphrase-encoding(7)
99

101       Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.
102
103       Licensed under the OpenSSL license (the "License").  You may not use
104       this file except in compliance with the License.  You can obtain a copy
105       in the file LICENSE in the source distribution or at
106       <https://www.openssl.org/source/license.html>.
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1101.1.1q                            2022-07-21                 PKCS12_NEWPASS(3)
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