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This function clears the cache of provider key references, and is used in evp_keymgmt_export_to_provider() when the internal key is dirty, as well as by EVP_PKEY_free_it(). Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/9312)
57 lines
1.6 KiB
Plaintext
57 lines
1.6 KiB
Plaintext
=pod
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=head1 NAME
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evp_keymgmt_export_to_provider,
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evp_keymgmt_clear_pkey_cache
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- key material provider export for EVP
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=head1 SYNOPSIS
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#include "internal/evp_int.h"
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void *evp_keymgmt_export_to_provider(EVP_PKEY *pk, EVP_KEYMGMT *keymgmt);
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void evp_keymgmt_clear_pkey_cache(EVP_PKEY *pk);
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=head1 DESCRIPTION
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evp_keymgmt_export_to_provider() exports the key material from the
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given key I<pk> to a provider via a B<EVP_KEYMGMT> interface, if this
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hasn't already been done.
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It maintains a cache of provider key references in I<pk> to keep track
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of all such exports.
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If I<pk> has an assigned legacy key, a check is done to see if any of
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its key material has changed since last export, i.e. the legacy key's
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is_dirty() method returns 1.
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If it has, the cache of already exported keys is cleared, and a new
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export is made with the new key material.
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evp_keymgmt_clear_pkey_cache() can be used to explicitly clear the
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cache of provider key references.
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=head1 RETURN VALUES
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evp_keymgmt_export_to_provider() returns a pointer to the appropriate
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provider side key (created or found again), or NULL on error.
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=head1 NOTES
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"Legacy key" is the term used for any key that has been assigned to an
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B<EVP_PKEY> with EVP_PKEY_assign_RSA() and similar functions.
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=head1 SEE ALSO
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L<EVP_PKEY_ASN1_METHOD(3)>, L<EVP_PKEY_assign_RSA(3)>
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=head1 COPYRIGHT
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Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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