mirror of
https://github.com/openssl/openssl.git
synced 2024-11-26 03:24:02 +08:00
56 lines
1.6 KiB
Plaintext
56 lines
1.6 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
PKCS7_decrypt - decrypt content from a PKCS#7 envelopedData structure
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/pkcs7.h>
|
|
|
|
int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
PKCS7_decrypt() extracts and decrypts the content from a PKCS#7 envelopedData
|
|
structure. B<pkey> is the private key of the recipient, B<cert> is the
|
|
recipients certificate, B<data> is a BIO to write the content to and
|
|
B<flags> is an optional set of flags.
|
|
|
|
=head1 NOTES
|
|
|
|
OpenSSL_add_all_algorithms() (or equivalent) should be called before using this
|
|
function or errors about unknown algorithms will occur.
|
|
|
|
Although the recipients certificate is not needed to decrypt the data it is needed
|
|
to locate the appropriate (of possible several) recipients in the PKCS#7 structure.
|
|
|
|
The following flags can be passed in the B<flags> parameter.
|
|
|
|
If the B<PKCS7_TEXT> flag is set MIME headers for type B<text/plain> are deleted
|
|
from the content. If the content is not of type B<text/plain> then an error is
|
|
returned.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
PKCS7_decrypt() returns either 1 for success or 0 for failure.
|
|
The error can be obtained from ERR_get_error(3)
|
|
|
|
=head1 BUGS
|
|
|
|
PKCS7_decrypt() must be passed the correct recipient key and certificate. It would
|
|
be better if it could look up the correct key and certificate from a database.
|
|
|
|
The lack of single pass processing and need to hold all data in memory as
|
|
mentioned in PKCS7_sign() also applies to PKCS7_verify().
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<ERR_get_error(3)|ERR_get_error(3)>, L<PKCS7_encrypt(3)|PKCS7_encrypt(3)>
|
|
|
|
=head1 HISTORY
|
|
|
|
PKCS7_decrypt() was added to OpenSSL 0.9.5
|
|
|
|
=cut
|