1=pod 2 3=head1 NAME 4 5PKCS12_newpass - change the password of a PKCS12 structure 6 7=head1 SYNOPSIS 8 9 #include <openssl/pkcs12.h> 10 11 int PKCS12_newpass(PKCS12 *p12, const char *oldpass, const char *newpass); 12 13=head1 DESCRIPTION 14 15PKCS12_newpass() changes the password of a PKCS12 structure. 16 17B<p12> is a pointer to a PKCS12 structure. B<oldpass> is the existing password 18and B<newpass> is the new password. 19 20=head1 NOTES 21 22Each of B<oldpass> and B<newpass> is independently interpreted as a string in 23the UTF-8 encoding. If it is not valid UTF-8, it is assumed to be ISO8859-1 24instead. 25 26In particular, this means that passwords in the locale character set 27(or code page on Windows) must potentially be converted to UTF-8 before 28use. This may include passwords from local text files, or input from 29the terminal or command line. Refer to the documentation of 30L<UI_OpenSSL(3)>, for example. 31 32=head1 RETURN VALUES 33 34PKCS12_newpass() returns 1 on success or 0 on failure. Applications can 35retrieve the most recent error from PKCS12_newpass() with ERR_get_error(). 36 37=head1 EXAMPLES 38 39This example loads a PKCS#12 file, changes its password and writes out 40the result to a new file. 41 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <openssl/pem.h> 45 #include <openssl/err.h> 46 #include <openssl/pkcs12.h> 47 48 int main(int argc, char **argv) 49 { 50 FILE *fp; 51 PKCS12 *p12; 52 53 if (argc != 5) { 54 fprintf(stderr, "Usage: pkread p12file password newpass opfile\n"); 55 return 1; 56 } 57 if ((fp = fopen(argv[1], "rb")) == NULL) { 58 fprintf(stderr, "Error opening file %s\n", argv[1]); 59 return 1; 60 } 61 p12 = d2i_PKCS12_fp(fp, NULL); 62 fclose(fp); 63 if (p12 == NULL) { 64 fprintf(stderr, "Error reading PKCS#12 file\n"); 65 ERR_print_errors_fp(stderr); 66 return 1; 67 } 68 if (PKCS12_newpass(p12, argv[2], argv[3]) == 0) { 69 fprintf(stderr, "Error changing password\n"); 70 ERR_print_errors_fp(stderr); 71 PKCS12_free(p12); 72 return 1; 73 } 74 if ((fp = fopen(argv[4], "wb")) == NULL) { 75 fprintf(stderr, "Error opening file %s\n", argv[4]); 76 PKCS12_free(p12); 77 return 1; 78 } 79 i2d_PKCS12_fp(fp, p12); 80 PKCS12_free(p12); 81 fclose(fp); 82 return 0; 83 } 84 85 86=head1 NOTES 87 88If the PKCS#12 structure does not have a password, then you must use the empty 89string "" for B<oldpass>. Using NULL for B<oldpass> will result in a 90PKCS12_newpass() failure. 91 92If the wrong password is used for B<oldpass> then the function will fail, 93with a MAC verification error. In rare cases the PKCS12 structure does not 94contain a MAC: in this case it will usually fail with a decryption padding 95error. 96 97=head1 BUGS 98 99The password format is a NULL terminated ASCII string which is converted to 100Unicode form internally. As a result some passwords cannot be supplied to 101this function. 102 103=head1 SEE ALSO 104 105L<PKCS12_create(3)>, L<ERR_get_error(3)>, 106L<passphrase-encoding(7)> 107 108=head1 COPYRIGHT 109 110Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved. 111 112Licensed under the OpenSSL license (the "License"). You may not use 113this file except in compliance with the License. You can obtain a copy 114in the file LICENSE in the source distribution or at 115L<https://www.openssl.org/source/license.html>. 116 117=cut 118