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=head1 NAME

PKCS12_create - create a PKCS#12 structure

=head1 SYNOPSIS

 #include <openssl/pkcs12.h>

 PKCS12 *PKCS12_create(char *pass, char *name, EVP_PKEY *pkey,
       X509 *cert, STACK_OF(X509) *ca, int nid_key, int nid_cert,
       int iter, int mac_iter, int keytype);

=head1 DESCRIPTION

PKCS12_create() creates a PKCS#12 structure.

B<pass> is the passphrase to use. B<name> is the B<friendlyName> to use for
the supplied certificate and key. B<pkey> is the private key to include in
the structure and B<cert> its corresponding certificates. B<ca> is an optional
set of certificates to also include in the structure.
Either B<pkey>, B<cert> or both can be B<NULL> to indicate that no key or
certificate is required.

B<nid_key> and B<nid_cert> are the encryption algorithms that should be used
for the key and certificate respectively. If either B<nid_key> or B<nid_cert>
is set to -1, no encryption will be used.

B<iter> is the encryption algorithm iteration count to use and B<mac_iter> is
the MAC iteration count to use. If B<mac_iter> is set to -1, the MAC will be
omitted entirely.

B<keytype> is the type of key.

=head1 NOTES

The parameters B<nid_key>, B<nid_cert>, B<iter>, B<mac_iter> and B<keytype>
can all be set to zero and sensible defaults will be used.

These defaults are: 40 bit RC2 encryption for certificates, triple DES
encryption for private keys, a key iteration count of PKCS12_DEFAULT_ITER
(currently 2048) and a MAC iteration count of 1.

The default MAC iteration count is 1 in order to retain compatibility with
old software which did not interpret MAC iteration counts. If such compatibility
is not required then B<mac_iter> should be set to PKCS12_DEFAULT_ITER.

B<keytype> adds a flag to the store private key. This is a non standard
extension that is only currently interpreted by MSIE. If set to zero the flag
is omitted, if set to B<KEY_SIG> the key can be used for signing only, if set
to B<KEY_EX> it can be used for signing and encryption. This option was useful
for old export grade software which could use signing only keys of arbitrary
size but had restrictions on the permissible sizes of keys which could be used
for encryption.

If a certificate contains an B<alias> or B<keyid> then this will be
used for the corresponding B<friendlyName> or B<localKeyID> in the
PKCS12 structure.

=head1 SEE ALSO

L<d2i_PKCS12(3)|d2i_PKCS12(3)>

=head1 HISTORY

PKCS12_create was added in OpenSSL 0.9.3.

Before OpenSSL 0.9.8, neither B<pkey> nor B<cert> were allowed to be B<NULL>,
and a value of B<-1> was not allowed for B<nid_key>, B<nid_cert> and
B<mac_iter>.

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