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 22OpenSSL_add_all_algorithms() (or equivalent) should be called before using this 23function or errors about unknown algorithms will occur. 24 25Although the recipients certificate is not needed to decrypt the data it is needed 26to locate the appropriate (of possible several) recipients in the PKCS#7 structure. 27 28The following flags can be passed in the B<flags> parameter. 29 30If the B<PKCS7_TEXT> flag is set MIME headers for type B<text/plain> are deleted 31from the content. If the content is not of type B<text/plain> then an error is 32returned. 33 34=head1 RETURN VALUES 35 36PKCS7_decrypt() returns either 1 for success or 0 for failure. 37The error can be obtained from ERR_get_error(3) 38 39=head1 BUGS 40 41PKCS7_decrypt() must be passed the correct recipient key and certificate. It would 42be better if it could look up the correct key and certificate from a database. 43 44The lack of single pass processing and need to hold all data in memory as 45mentioned in PKCS7_sign() also applies to PKCS7_verify(). 46 47=head1 SEE ALSO 48 49L<ERR_get_error(3)|ERR_get_error(3)>, L<PKCS7_encrypt(3)|PKCS7_encrypt(3)> 50 51=head1 HISTORY 52 53PKCS7_decrypt() was added to OpenSSL 0.9.5 54 55=cut 56