xref: /freebsd/secure/lib/libcrypto/man/man3/EVP_PKEY_CTX_new.3 (revision 577b62c2bacc7dfa228591ca3da361e1bc398301)
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Title "EVP_PKEY_CTX_NEW 3"
EVP_PKEY_CTX_NEW 3 "2023-02-07" "1.1.1t" "OpenSSL"
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"NAME"
EVP_PKEY_CTX_new, EVP_PKEY_CTX_new_id, EVP_PKEY_CTX_dup, EVP_PKEY_CTX_free - public key algorithm context functions
"SYNOPSIS"
Header "SYNOPSIS" .Vb 1 #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); .Ve
"DESCRIPTION"
Header "DESCRIPTION" The EVP_PKEY_CTX_new() function allocates public key algorithm context using the algorithm specified in pkey and \s-1ENGINE\s0 e.

The EVP_PKEY_CTX_new_id() function allocates public key algorithm context using the algorithm specified by id and \s-1ENGINE\s0 e. It is normally used when no \s-1EVP_PKEY\s0 structure is associated with the operations, for example during parameter generation of key generation for some algorithms.

\fBEVP_PKEY_CTX_dup() duplicates the context ctx.

\fBEVP_PKEY_CTX_free() frees up the context ctx. If ctx is \s-1NULL,\s0 nothing is done.

"NOTES"
Header "NOTES" The \s-1EVP_PKEY_CTX\s0 structure is an opaque public key algorithm context used by the OpenSSL high-level public key \s-1API.\s0 Contexts \s-1MUST NOT\s0 be shared between threads: that is it is not permissible to use the same context simultaneously in two threads.
"RETURN VALUES"
Header "RETURN VALUES" \fBEVP_PKEY_CTX_new(), EVP_PKEY_CTX_new_id(), EVP_PKEY_CTX_dup() returns either the newly allocated \s-1EVP_PKEY_CTX\s0 structure of \s-1NULL\s0 if an error occurred.

\fBEVP_PKEY_CTX_free() does not return a value.

"SEE ALSO"
Header "SEE ALSO" \fBEVP_PKEY_new\|(3)
"HISTORY"
Header "HISTORY" These functions were added in OpenSSL 1.0.0.
"COPYRIGHT"
Header "COPYRIGHT" Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.