PKCS7_decrypt(3)            OpenSSL            PKCS7_decrypt(3)





NAME
       PKCS7_decrypt - decrypt content from a PKCS#7 enveloped-
       Data structure

SYNOPSIS
       int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert,
       BIO *data, int flags);

DESCRIPTION
       PKCS7_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.

NOTES
       OpenSSL_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 struc-
       ture.

       The following flags can be passed in the flags parame-
       ter.

       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 VALUES
       PKCS7_decrypt() returns either 1 for success or 0 for
       failure.  The error can be obtained from
       ERR_get_error(3)

BUGS
       PKCS7_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 ALSO
       ERR_get_error(3), PKCS7_encrypt(3)

HISTORY
       PKCS7_decrypt() was added to OpenSSL 0.9.5



0.9.7c                     2002-10-09          PKCS7_decrypt(3)
