1*4724848cSchristos=pod 2*4724848cSchristos 3*4724848cSchristos=head1 NAME 4*4724848cSchristos 5*4724848cSchristosPKCS7_decrypt - decrypt content from a PKCS#7 envelopedData structure 6*4724848cSchristos 7*4724848cSchristos=head1 SYNOPSIS 8*4724848cSchristos 9*4724848cSchristos #include <openssl/pkcs7.h> 10*4724848cSchristos 11*4724848cSchristos int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags); 12*4724848cSchristos 13*4724848cSchristos=head1 DESCRIPTION 14*4724848cSchristos 15*4724848cSchristosPKCS7_decrypt() extracts and decrypts the content from a PKCS#7 envelopedData 16*4724848cSchristosstructure. B<pkey> is the private key of the recipient, B<cert> is the 17*4724848cSchristosrecipients certificate, B<data> is a BIO to write the content to and 18*4724848cSchristosB<flags> is an optional set of flags. 19*4724848cSchristos 20*4724848cSchristos=head1 NOTES 21*4724848cSchristos 22*4724848cSchristosAlthough the recipients certificate is not needed to decrypt the data it is needed 23*4724848cSchristosto locate the appropriate (of possible several) recipients in the PKCS#7 structure. 24*4724848cSchristos 25*4724848cSchristosThe following flags can be passed in the B<flags> parameter. 26*4724848cSchristos 27*4724848cSchristosIf the B<PKCS7_TEXT> flag is set MIME headers for type B<text/plain> are deleted 28*4724848cSchristosfrom the content. If the content is not of type B<text/plain> then an error is 29*4724848cSchristosreturned. 30*4724848cSchristos 31*4724848cSchristos=head1 RETURN VALUES 32*4724848cSchristos 33*4724848cSchristosPKCS7_decrypt() returns either 1 for success or 0 for failure. 34*4724848cSchristosThe error can be obtained from ERR_get_error(3) 35*4724848cSchristos 36*4724848cSchristos=head1 BUGS 37*4724848cSchristos 38*4724848cSchristosPKCS7_decrypt() must be passed the correct recipient key and certificate. It would 39*4724848cSchristosbe better if it could look up the correct key and certificate from a database. 40*4724848cSchristos 41*4724848cSchristosThe lack of single pass processing and need to hold all data in memory as 42*4724848cSchristosmentioned in PKCS7_sign() also applies to PKCS7_verify(). 43*4724848cSchristos 44*4724848cSchristos=head1 SEE ALSO 45*4724848cSchristos 46*4724848cSchristosL<ERR_get_error(3)>, L<PKCS7_encrypt(3)> 47*4724848cSchristos 48*4724848cSchristos=head1 COPYRIGHT 49*4724848cSchristos 50*4724848cSchristosCopyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved. 51*4724848cSchristos 52*4724848cSchristosLicensed under the OpenSSL license (the "License"). You may not use 53*4724848cSchristosthis file except in compliance with the License. You can obtain a copy 54*4724848cSchristosin the file LICENSE in the source distribution or at 55*4724848cSchristosL<https://www.openssl.org/source/license.html>. 56*4724848cSchristos 57*4724848cSchristos=cut 58