5 PKCS7_decrypt - decrypt content from a PKCS#7 envelopedData structure
9 int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags);
13 PKCS7_decrypt() extracts and decrypts the content from a PKCS#7 envelopedData
14 structure. B<pkey> is the private key of the recipient, B<cert> is the
15 recipients certificate, B<data> is a BIO to write the content to and
16 B<flags> is an optional set of flags.
20 OpenSSL_add_all_algorithms() (or equivalent) should be called before using this
21 function or errors about unknown algorithms will occur.
23 Although the recipients certificate is not needed to decrypt the data it is needed
24 to locate the appropriate (of possible several) recipients in the PKCS#7 structure.
26 The following flags can be passed in the B<flags> parameter.
28 If the B<PKCS7_TEXT> flag is set MIME headers for type B<text/plain> are deleted
29 from the content. If the content is not of type B<text/plain> then an error is
34 PKCS7_decrypt() returns either 1 for success or 0 for failure.
35 The error can be obtained from ERR_get_error(3)
39 PKCS7_decrypt() must be passed the correct recipient key and certificate. It would
40 be better if it could look up the correct key and certificate from a database.
42 The lack of single pass processing and need to hold all data in memory as
43 mentioned in PKCS7_sign() also applies to PKCS7_verify().
47 L<ERR_get_error(3)|ERR_get_error(3)>, L<PKCS7_encrypt(3)|PKCS7_encrypt(3)>
51 PKCS7_decrypt() was added to OpenSSL 0.9.5