PKCS7_DECRYPT(3) OpenSSL PKCS7_DECRYPT(3)NAMEPKCS7_decrypt - decrypt content from a PKCS#7 envelopedData
structure
SYNOPSIS
int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO
*data, int flags);
DESCRIPTIONPKCS7_decrypt() extracts and decrypts the content from a
PKCS#7 envelopedData structure. pkey is the private key of
the recipient, cert is the recipients certificate, data is a
BIO to write the content to and flags is an optional set of
flags.
NOTESOpenSSL_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 flags parameter.
If the PKCS7_TEXT flag is set MIME headers for type
text/plain are deleted from the content. If the content is
not of type text/plain then an error is returned.
RETURN VALUESPKCS7_decrypt() returns either 1 for success or 0 for
failure. The error can be obtained from ERR_get_error(3)BUGSPKCS7_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().
SEE ALSOERR_get_error(3), PKCS7_encrypt(3)HISTORYPKCS7_decrypt() was added to OpenSSL 0.9.5
MirOS BSD #10-current 2005-02-05 1
