1=pod 2 3=head1 NAME 4 5EVP_PKEY_set_type, EVP_PKEY_set_type_str, EVP_PKEY_set_type_by_keymgmt 6- functions to change the EVP_PKEY type 7 8=head1 SYNOPSIS 9 10 #include <openssl/evp.h> 11 12 int EVP_PKEY_set_type(EVP_PKEY *pkey, int type); 13 int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len); 14 int EVP_PKEY_set_type_by_keymgmt(EVP_PKEY *pkey, EVP_KEYMGMT *keymgmt); 15 16=head1 DESCRIPTION 17 18All the functions described here behave the same in so far that they 19clear all the previous key data and methods from I<pkey>, and reset it 20to be of the type of key given by the different arguments. If 21I<pkey> is NULL, these functions will still return the same return 22values as if it wasn't. 23 24EVP_PKEY_set_type() initialises I<pkey> to contain an internal legacy 25key. When doing this, it finds a L<EVP_PKEY_ASN1_METHOD(3)> 26corresponding to I<type>, and associates I<pkey> with the findings. 27It is an error if no L<EVP_PKEY_ASN1_METHOD(3)> could be found for 28I<type>. 29 30EVP_PKEY_set_type_str() initialises I<pkey> to contain an internal legacy 31key. When doing this, it finds a L<EVP_PKEY_ASN1_METHOD(3)> 32corresponding to I<str> that has then length I<len>, and associates 33I<pkey> with the findings. 34It is an error if no L<EVP_PKEY_ASN1_METHOD(3)> could be found for 35I<type>. 36 37For both EVP_PKEY_set_type() and EVP_PKEY_set_type_str(), I<pkey> gets 38a numeric type, which can be retrieved with L<EVP_PKEY_get_id(3)>. This 39numeric type is taken from the L<EVP_PKEY_ASN1_METHOD(3)> that was 40found, and is equal to or closely related to I<type> in the case of 41EVP_PKEY_set_type(), or related to I<str> in the case of 42EVP_PKEY_set_type_str(). 43 44EVP_PKEY_set_type_by_keymgmt() initialises I<pkey> to contain an 45internal provider side key. When doing this, it associates I<pkey> 46with I<keymgmt>. For keys initialised like this, the numeric type 47retrieved with L<EVP_PKEY_get_id(3)> will always be B<EVP_PKEY_NONE>. 48 49=head1 RETURN VALUES 50 51All functions described here return 1 if successful, or 0 on error. 52 53=head1 SEE ALSO 54 55L<EVP_PKEY_assign(3)>, L<EVP_PKEY_get_id(3)>, L<EVP_PKEY_get0_RSA(3)>, 56L<EVP_PKEY_copy_parameters(3)>, L<EVP_PKEY_ASN1_METHOD(3)>, 57L<EVP_KEYMGMT(3)> 58 59=head1 COPYRIGHT 60 61Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved. 62 63Licensed under the Apache License 2.0 (the "License"). You may not use 64this file except in compliance with the License. You can obtain a copy 65in the file LICENSE in the source distribution or at 66L<https://www.openssl.org/source/license.html>. 67 68=cut 69