5 EVP_PKEY_CTX_new, EVP_PKEY_CTX_new_id, EVP_PKEY_CTX_dup, EVP_PKEY_CTX_free - public key algorithm context functions
9 #include <openssl/evp.h>
11 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e);
12 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e);
13 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *ctx);
14 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx);
18 The EVP_PKEY_CTX_new() function allocates public key algorithm context using
19 the algorithm specified in B<pkey> and ENGINE B<e>.
21 The EVP_PKEY_CTX_new_id() function allocates public key algorithm context
22 using the algorithm specified by B<id> and ENGINE B<e>. It is normally used
23 when no B<EVP_PKEY> structure is associated with the operations, for example
24 during parameter generation of key generation for some algorithms.
26 EVP_PKEY_CTX_dup() duplicates the context B<ctx>.
28 EVP_PKEY_CTX_free() frees up the context B<ctx>.
29 If B<ctx> is NULL, nothing is done.
33 The B<EVP_PKEY_CTX> structure is an opaque public key algorithm context used
34 by the OpenSSL high-level public key API. Contexts B<MUST NOT> be shared between
35 threads: that is it is not permissible to use the same context simultaneously
40 EVP_PKEY_CTX_new(), EVP_PKEY_CTX_new_id(), EVP_PKEY_CTX_dup() returns either
41 the newly allocated B<EVP_PKEY_CTX> structure of B<NULL> if an error occurred.
43 EVP_PKEY_CTX_free() does not return a value.
51 These functions were added in OpenSSL 1.0.0.
55 Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.
57 Licensed under the OpenSSL license (the "License"). You may not use
58 this file except in compliance with the License. You can obtain a copy
59 in the file LICENSE in the source distribution or at
60 L<https://www.openssl.org/source/license.html>.