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131 .IX Title "PKCS12_NEWPASS 3"
132 .TH PKCS12_NEWPASS 3 "2018-09-11" "1.1.1" "OpenSSL"
133 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
134 .\" way too many mistakes in technical documents.
138 PKCS12_newpass \- change the password of a PKCS12 structure
140 .IX Header "SYNOPSIS"
142 \& #include <openssl/pkcs12.h>
144 \& int PKCS12_newpass(PKCS12 *p12, const char *oldpass, const char *newpass);
147 .IX Header "DESCRIPTION"
148 \&\fIPKCS12_newpass()\fR changes the password of a \s-1PKCS12\s0 structure.
150 \&\fBp12\fR is a pointer to a \s-1PKCS12\s0 structure. \fBoldpass\fR is the existing password
151 and \fBnewpass\fR is the new password.
154 Each of \fBoldpass\fR and \fBnewpass\fR is independently interpreted as a string in
155 the \s-1UTF\-8\s0 encoding. If it is not valid \s-1UTF\-8,\s0 it is assumed to be \s-1ISO8859\-1\s0
158 In particular, this means that passwords in the locale character set
159 (or code page on Windows) must potentially be converted to \s-1UTF\-8\s0 before
160 use. This may include passwords from local text files, or input from
161 the terminal or command line. Refer to the documentation of
162 \&\fIUI_OpenSSL\fR\|(3), for example.
164 .IX Header "RETURN VALUES"
165 \&\fIPKCS12_newpass()\fR returns 1 on success or 0 on failure. Applications can
166 retrieve the most recent error from \fIPKCS12_newpass()\fR with \fIERR_get_error()\fR.
169 This example loads a PKCS#12 file, changes its password and writes out
170 the result to a new file.
173 \& #include <stdio.h>
174 \& #include <stdlib.h>
175 \& #include <openssl/pem.h>
176 \& #include <openssl/err.h>
177 \& #include <openssl/pkcs12.h>
179 \& int main(int argc, char **argv)
185 \& fprintf(stderr, "Usage: pkread p12file password newpass opfile\en");
188 \& if ((fp = fopen(argv[1], "rb")) == NULL) {
189 \& fprintf(stderr, "Error opening file %s\en", argv[1]);
192 \& p12 = d2i_PKCS12_fp(fp, NULL);
194 \& if (p12 == NULL) {
195 \& fprintf(stderr, "Error reading PKCS#12 file\en");
196 \& ERR_print_errors_fp(stderr);
199 \& if (PKCS12_newpass(p12, argv[2], argv[3]) == 0) {
200 \& fprintf(stderr, "Error changing password\en");
201 \& ERR_print_errors_fp(stderr);
205 \& if ((fp = fopen(argv[4], "wb")) == NULL) {
206 \& fprintf(stderr, "Error opening file %s\en", argv[4]);
210 \& i2d_PKCS12_fp(fp, p12);
218 If the PKCS#12 structure does not have a password, then you must use the empty
219 string "" for \fBoldpass\fR. Using \s-1NULL\s0 for \fBoldpass\fR will result in a
220 \&\fIPKCS12_newpass()\fR failure.
222 If the wrong password is used for \fBoldpass\fR then the function will fail,
223 with a \s-1MAC\s0 verification error. In rare cases the \s-1PKCS12\s0 structure does not
224 contain a \s-1MAC:\s0 in this case it will usually fail with a decryption padding
228 The password format is a \s-1NULL\s0 terminated \s-1ASCII\s0 string which is converted to
229 Unicode form internally. As a result some passwords cannot be supplied to
232 .IX Header "SEE ALSO"
233 \&\fIPKCS12_create\fR\|(3), \fIERR_get_error\fR\|(3),
234 \&\fIpassphrase\-encoding\fR\|(7)
236 .IX Header "COPYRIGHT"
237 Copyright 2016\-2018 The OpenSSL Project Authors. All Rights Reserved.
239 Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
240 this file except in compliance with the License. You can obtain a copy
241 in the file \s-1LICENSE\s0 in the source distribution or at
242 <https://www.openssl.org/source/license.html>.