openssl/doc/crypto/EVP_PKEY_print_private.pod
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Reviewed-by: Andy Polyakov <appro@openssl.org>
2016-06-06 10:09:39 -04:00

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=pod
=head1 NAME
EVP_PKEY_print_public, EVP_PKEY_print_private, EVP_PKEY_print_params - public key algorithm printing routines
=head1 SYNOPSIS
#include <openssl/evp.h>
int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
int indent, ASN1_PCTX *pctx);
int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
int indent, ASN1_PCTX *pctx);
int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
int indent, ASN1_PCTX *pctx);
=head1 DESCRIPTION
The functions EVP_PKEY_print_public(), EVP_PKEY_print_private() and
EVP_PKEY_print_params() print out the public, private or parameter components
of key B<pkey> respectively. The key is sent to BIO B<out> in human readable
form. The parameter B<indent> indicated how far the printout should be indented.
The B<pctx> parameter allows the print output to be finely tuned by using
ASN1 printing options. If B<pctx> is set to NULL then default values will
be used.
=head1 NOTES
Currently no public key algorithms include any options in the B<pctx> parameter
parameter.
If the key does not include all the components indicated by the function then
only those contained in the key will be printed. For example passing a public
key to EVP_PKEY_print_private() will only print the public components.
=head1 RETURN VALUES
These functions all return 1 for success and 0 or a negative value for failure.
In particular a return value of -2 indicates the operation is not supported by
the public key algorithm.
=head1 SEE ALSO
L<EVP_PKEY_CTX_new(3)>,
L<EVP_PKEY_keygen(3)>
=head1 HISTORY
These functions were first added to OpenSSL 1.0.0.
=head1 COPYRIGHT
Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (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