4746f25ac6
[skip ci] Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/7829)
59 lines
2 KiB
Text
59 lines
2 KiB
Text
=pod
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=head1 NAME
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EC_KEY_get_enc_flags, EC_KEY_set_enc_flags
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- Get and set flags for encoding EC_KEY structures
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=head1 SYNOPSIS
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#include <openssl/ec.h>
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unsigned int EC_KEY_get_enc_flags(const EC_KEY *key);
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void EC_KEY_set_enc_flags(EC_KEY *eckey, unsigned int flags);
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=head1 DESCRIPTION
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The format of the external representation of the public key written by
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i2d_ECPrivateKey() (such as whether it is stored in a compressed form or not) is
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described by the point_conversion_form. See L<EC_GROUP_copy(3)>
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for a description of point_conversion_form.
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When reading a private key encoded without an associated public key (e.g. if
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EC_PKEY_NO_PUBKEY has been used - see below), then d2i_ECPrivateKey() generates
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the missing public key automatically. Private keys encoded without parameters
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(e.g. if EC_PKEY_NO_PARAMETERS has been used - see below) cannot be loaded using
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d2i_ECPrivateKey().
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The functions EC_KEY_get_enc_flags() and EC_KEY_set_enc_flags() get and set the
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value of the encoding flags for the B<key>. There are two encoding flags
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currently defined - EC_PKEY_NO_PARAMETERS and EC_PKEY_NO_PUBKEY. These flags
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define the behaviour of how the B<key> is converted into ASN1 in a call to
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i2d_ECPrivateKey(). If EC_PKEY_NO_PARAMETERS is set then the public parameters for
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the curve are not encoded along with the private key. If EC_PKEY_NO_PUBKEY is
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set then the public key is not encoded along with the private key.
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=head1 RETURN VALUES
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EC_KEY_get_enc_flags() returns the value of the current encoding flags for the
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EC_KEY.
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=head1 SEE ALSO
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L<crypto(7)>, L<EC_GROUP_new(3)>,
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L<EC_GROUP_copy(3)>, L<EC_POINT_new(3)>,
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L<EC_POINT_add(3)>,
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L<EC_GFp_simple_method(3)>,
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L<d2i_ECPKParameters(3)>,
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L<d2i_ECPrivateKey(3)>
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=head1 COPYRIGHT
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Copyright 2015-2017 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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