Updated: 2021/Apr/14

EVP_PKEY_CTX_new(3)                 OpenSSL                EVP_PKEY_CTX_new(3)



NAME
       EVP_PKEY_CTX_new, EVP_PKEY_CTX_new_id, EVP_PKEY_CTX_dup,
       EVP_PKEY_CTX_free - public key algorithm context functions

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
        #include <openssl/evp.h>

        EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e);
        EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e);
        EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *ctx);
        void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx);

DESCRIPTION
       The EVP_PKEY_CTX_new() function allocates public key algorithm context
       using the algorithm specified in pkey and ENGINE e.

       The EVP_PKEY_CTX_new_id() function allocates public key algorithm
       context using the algorithm specified by id and ENGINE e. It is
       normally used when no EVP_PKEY structure is associated with the
       operations, for example during parameter generation of key generation
       for some algorithms.

       EVP_PKEY_CTX_dup() duplicates the context ctx.

       EVP_PKEY_CTX_free() frees up the context ctx.  If ctx is NULL, nothing
       is done.

NOTES
       The EVP_PKEY_CTX structure is an opaque public key algorithm context
       used by the OpenSSL high-level public key API. Contexts MUST NOT be
       shared between threads: that is it is not permissible to use the same
       context simultaneously in two threads.

RETURN VALUES
       EVP_PKEY_CTX_new(), EVP_PKEY_CTX_new_id(), EVP_PKEY_CTX_dup() returns
       either the newly allocated EVP_PKEY_CTX structure of NULL if an error
       occurred.

       EVP_PKEY_CTX_free() does not return a value.

SEE ALSO
       EVP_PKEY_new(3)

HISTORY
       These functions were added in OpenSSL 1.0.0.

COPYRIGHT
       Copyright 2006-2020 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
       <https://www.openssl.org/source/license.html>.



1.1.1i                            2020-12-10               EVP_PKEY_CTX_new(3)