PKCS12_NEWPASS(3) Library Functions Manual PKCS12_NEWPASS(3)
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; |
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PKCS12 *p12; |
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if (argc != 5) { |
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fprintf(stderr, |
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"Usage: pkread p12file password newpass opfile\n"); |
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return 1; |
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} |
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if ((fp = fopen(argv[1], "rb")) == NULL) { |
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fprintf(stderr, "Error opening file %s\n", argv[1]); |
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return 1; |
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} |
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p12 = d2i_PKCS12_fp(fp, NULL); |
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fclose(fp); |
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if (p12 == NULL) { |
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fprintf(stderr, "Error reading PKCS#12 file\n"); |
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ERR_print_errors_fp(stderr); |
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return 1; |
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} |
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if (PKCS12_newpass(p12, argv[2], argv[3]) == 0) { |
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fprintf(stderr, "Error changing password\n"); |
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ERR_print_errors_fp(stderr); |
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PKCS12_free(p12); |
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return 1; |
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} |
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if ((fp = fopen(argv[4], "wb")) == NULL) { |
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fprintf(stderr, "Error opening file %s\n", argv[4]); |
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PKCS12_free(p12); |
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return 1; |
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} |
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i2d_PKCS12_fp(fp, p12); |
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PKCS12_free(p12); |
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fclose(fp); |
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return 0; |
}
SEE ALSO
PKCS12_create(3), PKCS12_new(3)
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. GNU June 14, 2019 PKCS12_NEWPASS(3)