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Edit File : EVP_PKEY_CTX_new_id.3 \| Size : 5.68 KB
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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 genration 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. .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 first added to OpenSSL 1.0.0. Back

Edit File : EVP_PKEY_CTX_new_id.3 | Size : 5.68 KB

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.\" ========================================================================
.\"
.IX Title "EVP_PKEY_CTX_new 3"
.TH EVP_PKEY_CTX_new 3 "2019-12-20" "1.0.2u" "OpenSSL"
.\" For nroff, turn off justification.  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 genration 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.
.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 first added to OpenSSL 1.0.0.

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