1=pod 2 3=head1 NAME 4 5PKCS7_decrypt - decrypt content from a PKCS#7 envelopedData structure 6 7=head1 SYNOPSIS 8 9 #include <openssl/pkcs7.h> 10 11 int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags); 12 13=head1 DESCRIPTION 14 15PKCS7_decrypt() extracts and decrypts the content from a PKCS#7 envelopedData 16structure. B<pkey> is the private key of the recipient, B<cert> is the 17recipients certificate, B<data> is a BIO to write the content to and 18B<flags> is an optional set of flags. 19 20=head1 NOTES 21 22Although the recipients certificate is not needed to decrypt the data it is needed 23to locate the appropriate (of possible several) recipients in the PKCS#7 structure. 24 25The following flags can be passed in the B<flags> parameter. 26 27If the B<PKCS7_TEXT> flag is set MIME headers for type B<text/plain> are deleted 28from the content. If the content is not of type B<text/plain> then an error is 29returned. 30 31=head1 RETURN VALUES 32 33PKCS7_decrypt() returns either 1 for success or 0 for failure. 34The error can be obtained from ERR_get_error(3) 35 36=head1 BUGS 37 38PKCS7_decrypt() must be passed the correct recipient key and certificate. It would 39be better if it could look up the correct key and certificate from a database. 40 41The lack of single pass processing and need to hold all data in memory as 42mentioned in PKCS7_sign() also applies to PKCS7_verify(). 43 44=head1 SEE ALSO 45 46L<ERR_get_error(3)>, L<PKCS7_encrypt(3)> 47 48=head1 COPYRIGHT 49 50Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved. 51 52Licensed under the Apache License 2.0 (the "License"). You may not use 53this file except in compliance with the License. You can obtain a copy 54in the file LICENSE in the source distribution or at 55L<https://www.openssl.org/source/license.html>. 56 57=cut 58