1EVP_PKEY_CTX_NEW(3)                 OpenSSL                EVP_PKEY_CTX_NEW(3)
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NAME

6       EVP_PKEY_CTX_new, EVP_PKEY_CTX_new_id, EVP_PKEY_CTX_dup,
7       EVP_PKEY_CTX_free - public key algorithm context functions
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SYNOPSIS

10        #include <openssl/evp.h>
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12        EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e);
13        EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e);
14        EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *ctx);
15        void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx);
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DESCRIPTION

18       The EVP_PKEY_CTX_new() function allocates public key algorithm context
19       using the algorithm specified in pkey and ENGINE e.
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21       The EVP_PKEY_CTX_new_id() function allocates public key algorithm
22       context using the algorithm specified by id and ENGINE e. It is
23       normally used when no EVP_PKEY structure is associated with the
24       operations, for example during parameter generation of key generation
25       for some algorithms.
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27       EVP_PKEY_CTX_dup() duplicates the context ctx.
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29       EVP_PKEY_CTX_free() frees up the context ctx.  If ctx is NULL, nothing
30       is done.
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NOTES

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

39       EVP_PKEY_CTX_new(), EVP_PKEY_CTX_new_id(), EVP_PKEY_CTX_dup() returns
40       either the newly allocated EVP_PKEY_CTX structure of NULL if an error
41       occurred.
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43       EVP_PKEY_CTX_free() does not return a value.
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SEE ALSO

46       EVP_PKEY_new(3)
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HISTORY

49       These functions were added in OpenSSL 1.0.0.
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52       Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.
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54       Licensed under the OpenSSL license (the "License").  You may not use
55       this file except in compliance with the License.  You can obtain a copy
56       in the file LICENSE in the source distribution or at
57       <https://www.openssl.org/source/license.html>.
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611.1.1q                            2022-07-07               EVP_PKEY_CTX_NEW(3)
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