=pod =head1 NAME EVP_PKEY_new, EVP_PKEY_up_ref, EVP_PKEY_free - private key allocation functions =head1 SYNOPSIS #include EVP_PKEY *EVP_PKEY_new(void); int EVP_PKEY_up_ref(EVP_PKEY *key); void EVP_PKEY_free(EVP_PKEY *key); =head1 DESCRIPTION The EVP_PKEY_new() function allocates an empty B structure which is used by OpenSSL to store private keys. The reference count is set to B<1>. EVP_PKEY_up_ref() increments the reference count of B. EVP_PKEY_free() decrements the reference count of B and, if the reference count is zero, frees it up. If B is NULL, nothing is done. =head1 NOTES The B structure is used by various OpenSSL functions which require a general private key without reference to any particular algorithm. The structure returned by EVP_PKEY_new() is empty. To add a private key to this empty structure the functions described in L should be used. =head1 RETURN VALUES EVP_PKEY_new() returns either the newly allocated B structure or B if an error occurred. EVP_PKEY_up_ref() returns 1 for success and 0 for failure. =head1 SEE ALSO L =head1 HISTORY EVP_PKEY_new() and EVP_PKEY_free() exist in all versions of OpenSSL. EVP_PKEY_up_ref() was first added to OpenSSL 1.1.0. =head1 COPYRIGHT Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at L. =cut