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EVP_PKEY_CTX_new_id.3
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" EVP_PKEY_CTX_new, EVP_PKEY_CTX_new_id, EVP_PKEY_CTX_dup, EVP_PKEY_CTX_free \- public key algorithm context functions .SH "SYNOPSIS" .IX 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 .SH "DESCRIPTION" .IX Header "DESCRIPTION" The \fBEVP_PKEY_CTX_new()\fR function allocates public key algorithm context using the algorithm specified in \fBpkey\fR and \s-1ENGINE\s0 \fBe\fR. .PP The \fBEVP_PKEY_CTX_new_id()\fR function allocates public key algorithm context using the algorithm specified by \fBid\fR and \s-1ENGINE\s0 \fBe\fR. It is normally used when no \fB\s-1EVP_PKEY\s0\fR structure is associated with the operations, for example during parameter generation of key generation for some algorithms. .PP \&\fBEVP_PKEY_CTX_dup()\fR duplicates the context \fBctx\fR. .PP \&\fBEVP_PKEY_CTX_free()\fR frees up the context \fBctx\fR. If \fBctx\fR is \s-1NULL,\s0 nothing is done. .SH "NOTES" .IX Header "NOTES" The \fB\s-1EVP_PKEY_CTX\s0\fR structure is an opaque public key algorithm context used by the OpenSSL high-level public key \s-1API.\s0 Contexts \fB\s-1MUST NOT\s0\fR be shared between threads: that is it is not permissible to use the same context simultaneously in two threads. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBEVP_PKEY_CTX_new()\fR, \fBEVP_PKEY_CTX_new_id()\fR, \fBEVP_PKEY_CTX_dup()\fR returns either the newly allocated \fB\s-1EVP_PKEY_CTX\s0\fR structure of \fB\s-1NULL\s0\fR if an error occurred. .PP \&\fBEVP_PKEY_CTX_free()\fR does not return a value. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBEVP_PKEY_new\fR\|(3) .SH "HISTORY" .IX Header "HISTORY" These functions were added in OpenSSL 1.0.0. .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2006\-2020 The OpenSSL Project Authors. All Rights Reserved. .PP 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>.
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