Latest update.

doc/man3/EVP_PKEY_check.pod

@@ -0,0 +1,73 @@
+=pod
+
+=head1 NAME
+
+EVP_PKEY_check, EVP_PKEY_param_check, EVP_PKEY_public_check,
+EVP_PKEY_private_check, EVP_PKEY_pairwise_check
+- key and parameter validation functions
+
+=head1 SYNOPSIS
+
+ #include <openssl/evp.h>
+
+ int EVP_PKEY_check(EVP_PKEY_CTX *ctx);
+ int EVP_PKEY_param_check(EVP_PKEY_CTX *ctx);
+ int EVP_PKEY_public_check(EVP_PKEY_CTX *ctx);
+ int EVP_PKEY_private_check(EVP_PKEY_CTX *ctx);
+ int EVP_PKEY_pairwise_check(EVP_PKEY_CTX *ctx);
+
+=head1 DESCRIPTION
+
+EVP_PKEY_param_check() validates the parameters component of the key
+given by B<ctx>.
+
+EVP_PKEY_public_check() validates the public component of the key given by B<ctx>.
+
+EVP_PKEY_private_check() validates the private component of the key given by B<ctx>.
+
+EVP_PKEY_pairwise_check() validates that the public and private components have
+the correct mathematical relationship to each other for the key given by B<ctx>.
+
+EVP_PKEY_check() validates all components of a key given by B<ctx>.
+
+=head1 NOTES
+
+Refer to SP800-56A and SP800-56B for rules relating to when these functions
+should be called during key establishment.
+It is not necessary to call these functions after locally calling an approved key
+generation method, but may be required for assurance purposes when receiving
+keys from a third party.
+
+In OpenSSL an EVP_PKEY structure containing a private key also contains the
+public key components and parameters (if any). An OpenSSL private key is
+equivalent to what some libraries call a "key pair". A private key can be used
+in functions which require the use of a public key or parameters.
+
+=head1 RETURN VALUES
+
+All functions return 1 for success or others for failure.
+They return -2 if the operation is not supported for the specific algorithm.
+
+=head1 SEE ALSO
+
+L<EVP_PKEY_CTX_new(3)>,
+L<EVP_PKEY_fromdata(3)>,
+
+=head1 HISTORY
+
+EVP_PKEY_check(), EVP_PKEY_public_check() and EVP_PKEY_param_check() were added
+in OpenSSL 1.1.1.
+
+EVP_PKEY_private_check() and EVP_PKEY_pairwise_check() were added
+in OpenSSL 3.0.
+
+=head1 COPYRIGHT
+
+Copyright 2006-2020 The OpenSSL Project Authors. All Rights Reserved.
+
+Licensed under the Apache License 2.0 (the "License").  You may not use
+this file except in compliance with the License.  You can obtain a copy
+in the file LICENSE in the source distribution or at
+L<https://www.openssl.org/source/license.html>.
+
+=cut