PKCS7_decrypt(3)

PKCS7_decrypt(3)             OpenSSL             PKCS7_decrypt(3)

NAME

     PKCS7_decrypt - decrypt content from a PKCS#7 envelopedData
     structure

SYNOPSIS

      #include <openssl/pkcs7.h>

      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 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 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

1.0.2t               Last change: 2019-09-10                    1