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ecfbe2f046
Without these check, a DSA structure without key parameters will cause these functions to crash. This is also the case in pre-3.0 OpenSSL, but since we now extract these data early, to cache them in the EVP_PKEY structure, the same crash happens earlier and much more internally. The added checks are of the same kind as DSA_security_bits() already does. Fixes #13610 Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org> (Merged from https://github.com/openssl/openssl/pull/13611)
69 lines
1.8 KiB
Plaintext
69 lines
1.8 KiB
Plaintext
=pod
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=head1 NAME
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DSA_size, DSA_bits, DSA_security_bits - get DSA signature size, key bits or security bits
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=head1 SYNOPSIS
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#include <openssl/dsa.h>
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int DSA_bits(const DSA *dsa);
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Deprecated since OpenSSL 3.0, can be hidden entirely by defining
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B<OPENSSL_API_COMPAT> with a suitable version value, see
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L<openssl_user_macros(7)>:
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int DSA_size(const DSA *dsa);
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int DSA_security_bits(const DSA *dsa);
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=head1 DESCRIPTION
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DSA_bits() returns the number of bits in key I<dsa>: this is the number
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of bits in the I<p> parameter.
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The remaining functions described on this page are deprecated.
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Applications should instead use L<EVP_PKEY_security_bits(3)> and
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L<EVP_PKEY_size(3)>.
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DSA_size() returns the maximum size of an ASN.1 encoded DSA signature
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for key I<dsa> in bytes. It can be used to determine how much memory must
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be allocated for a DSA signature.
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DSA_security_bits() returns the number of security bits of the given I<dsa>
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key. See L<BN_security_bits(3)>.
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=head1 RETURN VALUES
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DSA_security_bits() returns the number of security bits in the key, or -1 if
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I<dsa> doesn't hold any key parameters.
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DSA_bits() returns the number of bits in the key, or -1 if I<dsa> doesn't
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hold any key parameters.
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DSA_size() returns the signature size in bytes, or -1 if I<dsa> doesn't
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hold any key parameters.
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=head1 SEE ALSO
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L<EVP_PKEY_bits(3)>,
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L<EVP_PKEY_security_bits(3)>,
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L<EVP_PKEY_size(3)>,
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L<DSA_new(3)>, L<DSA_sign(3)>
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=head1 HISTORY
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The DSA_size() and DSA_security_bits() functions were deprecated in OpenSSL 3.0.
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=head1 COPYRIGHT
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Copyright 2000-2020 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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