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1=pod
2
3=head1 NAME
4
5RSA_check_key - validate private RSA keys
6
7=head1 SYNOPSIS
8
9 #include <openssl/rsa.h>
10
11 int RSA_check_key(RSA *rsa);
12
13=head1 DESCRIPTION
14
15This function validates RSA keys. It checks that B<p> and B<q> are
16in fact prime, and that B<n = p*q>.
17
18It also checks that B<d*e = 1 mod (p-1*q-1)>,
19and that B<dmp1>, B<dmq1> and B<iqmp> are set correctly or are B<NULL>.
20
21The key's public components may not be B<NULL>.
22
23=head1 RETURN VALUE
24
25RSA_check_key() returns 1 if B<rsa> is a valid RSA key, and 0 otherwise.
26-1 is returned if an error occurs while checking the key.
27
28If the key is invalid or an error occurred, the reason code can be
29obtained using L<ERR_get_error(3)|ERR_get_error(3)>.
30
31=head1 SEE ALSO
32
33L<rsa(3)|rsa(3)>, L<ERR_get_error(3)|ERR_get_error(3)>
34
35=head1 HISTORY
36
37RSA_check() appeared in OpenSSL 0.9.4.
38
39=cut