| =pod |
| |
| =head1 NAME |
| |
| RSA_size, RSA_bits, RSA_security_bits - get RSA modulus size or security bits |
| |
| =head1 SYNOPSIS |
| |
| #include <openssl/rsa.h> |
| |
| int RSA_bits(const RSA *rsa); |
| |
| The following functions have been deprecated since OpenSSL 3.0, and can be |
| hidden entirely by defining B<OPENSSL_API_COMPAT> with a suitable version value, |
| see L<openssl_user_macros(7)>: |
| |
| int RSA_size(const RSA *rsa); |
| |
| int RSA_security_bits(const RSA *rsa); |
| |
| =head1 DESCRIPTION |
| |
| RSA_bits() returns the number of significant bits. |
| |
| B<rsa> and B<rsa-E<gt>n> must not be B<NULL>. |
| |
| The remaining functions described on this page are deprecated. |
| Applications should instead use L<EVP_PKEY_get_size(3)>, L<EVP_PKEY_get_bits(3)> |
| and L<EVP_PKEY_get_security_bits(3)>. |
| |
| RSA_size() returns the RSA modulus size in bytes. It can be used to |
| determine how much memory must be allocated for an RSA encrypted |
| value. |
| |
| RSA_security_bits() returns the number of security bits of the given B<rsa> |
| key. See L<BN_security_bits(3)>. |
| |
| =head1 RETURN VALUES |
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| RSA_bits() returns the number of bits in the key. |
| |
| RSA_size() returns the size of modulus in bytes. |
| |
| RSA_security_bits() returns the number of security bits. |
| |
| =head1 SEE ALSO |
| |
| L<BN_num_bits(3)> |
| |
| =head1 HISTORY |
| |
| The RSA_size() and RSA_security_bits() functions were deprecated in OpenSSL 3.0. |
| |
| The RSA_bits() function was added in OpenSSL 1.1.0. |
| |
| =head1 COPYRIGHT |
| |
| Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved. |
| |
| Licensed under the Apache License 2.0 (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 |
