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Convention source is man-pages(7) Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org> (Merged from https://github.com/openssl/openssl/pull/10184)
76 lines
2.4 KiB
Plaintext
76 lines
2.4 KiB
Plaintext
=pod
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=head1 NAME
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EVP_PKEY_CTX_new, EVP_PKEY_CTX_new_id, EVP_PKEY_CTX_new_provided,
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EVP_PKEY_CTX_dup, EVP_PKEY_CTX_free
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- public key algorithm context functions
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=head1 SYNOPSIS
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#include <openssl/evp.h>
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EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e);
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EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e);
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EVP_PKEY_CTX *EVP_PKEY_CTX_new_provided(const char *name,
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const char *propquery);
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EVP_PKEY_CTX *EVP_PKEY_CTX_dup(const EVP_PKEY_CTX *ctx);
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void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx);
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=head1 DESCRIPTION
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The EVP_PKEY_CTX_new() function allocates public key algorithm context using
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the algorithm specified in I<pkey> and ENGINE I<e>.
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The EVP_PKEY_CTX_new_id() function allocates public key algorithm context
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using the algorithm specified by I<id> and ENGINE I<e>.
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The EVP_PKEY_CTX_new_provided() function allocates a public key
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algorithm context using the algorithm specified by I<name> and the
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property query I<propquery>. The strings aren't duplicated, so they
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must remain unchanged for the lifetime of the returned B<EVP_PKEY_CTX>
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or of any of its duplicates.
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EVP_PKEY_CTX_new_id() and EVP_PKEY_CTX_new_provided() are normally
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used when no B<EVP_PKEY> structure is associated with the operations,
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for example during parameter generation or key generation for some
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algorithms.
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EVP_PKEY_CTX_dup() duplicates the context I<ctx>.
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EVP_PKEY_CTX_free() frees up the context I<ctx>.
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If I<ctx> is NULL, nothing is done.
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=head1 NOTES
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The B<EVP_PKEY_CTX> structure is an opaque public key algorithm context used
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by the OpenSSL high level public key API. Contexts B<MUST NOT> be shared between
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threads: that is it is not permissible to use the same context simultaneously
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in two threads.
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=head1 RETURN VALUES
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EVP_PKEY_CTX_new(), EVP_PKEY_CTX_new_id(), EVP_PKEY_CTX_dup() returns either
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the newly allocated B<EVP_PKEY_CTX> structure of B<NULL> if an error occurred.
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EVP_PKEY_CTX_free() does not return a value.
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=head1 SEE ALSO
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L<EVP_PKEY_new(3)>
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=head1 HISTORY
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These functions were added in OpenSSL 1.0.0.
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=head1 COPYRIGHT
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Copyright 2006-2016 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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