NAME
PKCS12_newpass —
change the password of a PKCS#12
structure
SYNOPSIS
#include
<openssl/pkcs12.h>
int
PKCS12_newpass(PKCS12 *p12,
const char *oldpass, const char
*newpass);
DESCRIPTION
PKCS12_newpass()
changes the password of a PKCS#12 structure.
p12 is a pointer to a PKCS#12 structure. oldpass is the existing password and newpass is the new password.
If the PKCS#12 structure does not have a
password, use the empty string "" for
oldpass. Passing NULL for
oldpass results in a
PKCS12_newpass()
failure.
If the wrong password is used for oldpass, the function will fail with a MAC verification error. In rare cases, the PKCS#12 structure does not contain a MAC: in this case it will usually fail with a decryption padding error.
RETURN VALUES
Upon successful completion, 1 is returned; otherwise 0 is returned and an error code can be retrieved with ERR_get_error(3).
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;
}
SEE ALSO
HISTORY
PKCS12_newpass() first appeared in OpenSSL
0.9.5 and has been available since OpenBSD 2.7.
BUGS
The password format is a NUL terminated ASCII string which is converted to Unicode form internally. As a result, some passwords cannot be supplied to this function.