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-=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