5 EVP_PKEY_new, EVP_PKEY_up_ref, EVP_PKEY_free - private key allocation functions.
9 #include <openssl/evp.h>
11 EVP_PKEY *EVP_PKEY_new(void);
12 void EVP_PKEY_up_ref(EVP_PKEY *key);
13 void EVP_PKEY_free(EVP_PKEY *key);
18 The EVP_PKEY_new() function allocates an empty B<EVP_PKEY> structure which is
19 used by OpenSSL to store private keys. The reference count is set to B<1>.
21 EVP_PKEY_up_ref() increments the reference count of B<key>.
23 EVP_PKEY_free() decrements the reference count of B<key> and, if the reference
24 count is zero, frees it up. If B<key> is NULL, nothing is done.
28 The B<EVP_PKEY> structure is used by various OpenSSL functions which require a
29 general private key without reference to any particular algorithm.
31 The structure returned by EVP_PKEY_new() is empty. To add a private key to this
32 empty structure the functions described in L<EVP_PKEY_set1_RSA(3)> should be
37 EVP_PKEY_new() returns either the newly allocated B<EVP_PKEY> structure or
38 B<NULL> if an error occurred.
40 EVP_PKEY_up_ref() and EVP_PKEY_free() do not return a value.
44 L<EVP_PKEY_set1_RSA(3)>
48 EVP_PKEY_new() and EVP_PKEY_free() exist in all versions of OpenSSL.
50 EVP_PKEY_up_ref() was first added to OpenSSL 1.1.0.