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Title "PKCS12_NEWPASS 3" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
PKCS12_newpass - change the password of a PKCS12 structure Header "SYNOPSIS" .Vb 1 #include <openssl/pkcs12.h> \& int PKCS12_newpass(PKCS12 *p12, const char *oldpass, const char *newpass); .Ve Header "DESCRIPTION" \fBPKCS12_newpass() changes the password of a \s-1PKCS12\s0 structure.

\fBp12 is a pointer to a \s-1PKCS12\s0 structure. oldpass is the existing password and newpass is the new password.

Header "NOTES" Each of oldpass and newpass is independently interpreted as a string in the \s-1UTF-8\s0 encoding. If it is not valid \s-1UTF-8,\s0 it is assumed to be \s-1ISO8859-1\s0 instead.

In particular, this means that passwords in the locale character set (or code page on Windows) must potentially be converted to \s-1UTF-8\s0 before use. This may include passwords from local text files, or input from the terminal or command line. Refer to the documentation of \fBUI_OpenSSL\|(3), for example.

Header "RETURN VALUES" \fBPKCS12_newpass() returns 1 on success or 0 on failure. Applications can retrieve the most recent error from PKCS12_newpass() with ERR_get_error(). Header "EXAMPLES" This example loads a PKCS#12 file, changes its password and writes out the result to a new file.

.Vb 5 #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\en"); return 1; } if ((fp = fopen(argv[1], "rb")) == NULL) { fprintf(stderr, "Error opening file %s\en", argv[1]); return 1; } p12 = d2i_PKCS12_fp(fp, NULL); fclose(fp); if (p12 == NULL) { fprintf(stderr, "Error reading PKCS#12 file\en"); ERR_print_errors_fp(stderr); return 1; } if (PKCS12_newpass(p12, argv[2], argv[3]) == 0) { fprintf(stderr, "Error changing password\en"); ERR_print_errors_fp(stderr); PKCS12_free(p12); return 1; } if ((fp = fopen(argv[4], "wb")) == NULL) { fprintf(stderr, "Error opening file %s\en", argv[4]); PKCS12_free(p12); return 1; } i2d_PKCS12_fp(fp, p12); PKCS12_free(p12); fclose(fp); return 0; } .Ve

Header "NOTES" If the PKCS#12 structure does not have a password, then you must use the empty string "" for oldpass. Using \s-1NULL\s0 for oldpass will result in a \fBPKCS12_newpass() failure.

If the wrong password is used for oldpass then the function will fail, with a \s-1MAC\s0 verification error. In rare cases the \s-1PKCS12\s0 structure does not contain a \s-1MAC:\s0 in this case it will usually fail with a decryption padding error.

Header "BUGS" The password format is a \s-1NULL\s0 terminated \s-1ASCII\s0 string which is converted to Unicode form internally. As a result some passwords cannot be supplied to this function. Header "SEE ALSO" \fBPKCS12_create\|(3), ERR_get_error\|(3), \fBpassphrase-encoding\|(7) Header "COPYRIGHT" Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.