mirror of
https://github.com/openssl/openssl.git
synced 2024-12-16 21:43:42 +08:00
53 lines
1.5 KiB
Plaintext
53 lines
1.5 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
EVP_PKEY_CTX_new, EVP_PKEY_CTX_new_id, EVP_PKEY_CTX_dup, EVP_PKEY_CTX_free - public key algorithm context functions.
|
|
|
|
=head1 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);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
The EVP_PKEY_CTX_new() function allocates public key algorithm context using
|
|
the algorithm specified in B<pkey> and ENGINE B<e>.
|
|
|
|
The EVP_PKEY_CTX_new_id() function allocates public key algorithm context
|
|
using the algorithm specified by B<id> and ENGINE B<e>. It is normally used
|
|
when no B<EVP_PKEY> structure is associated with the operations, for example
|
|
during parameter generation of key genration for some algorithms.
|
|
|
|
EVP_PKEY_CTX_dup() duplicates the context B<ctx>.
|
|
|
|
EVP_PKEY_CTX_free() frees up the context B<ctx>.
|
|
|
|
=head1 NOTES
|
|
|
|
The B<EVP_PKEY_CTX> structure is an opaque public key algorithm context used
|
|
by the OpenSSL high level public key API. Contexts B<MUST NOT> be shared between
|
|
threads: that is it is not permissible to use the same context simultaneously
|
|
in two threads.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
EVP_PKEY_CTX_new(), EVP_PKEY_CTX_new_id(), EVP_PKEY_CTX_dup() returns either
|
|
the newly allocated B<EVP_PKEY_CTX> structure of B<NULL> if an error occurred.
|
|
|
|
EVP_PKEY_CTX_free() does not return a value.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<EVP_PKEY_new(3)|EVP_PKEY_new(3)>
|
|
|
|
=head1 HISTORY
|
|
|
|
These functions were first added to OpenSSL 1.0.0.
|
|
|
|
=cut
|