RSA_check_key(3)RSA_check_key(3)NAMERSA_check_key - Validate private RSA keys
SYNOPSIS
#include <openssl/rsa.h>
int RSA_check_key(
RSA *rsa );
DESCRIPTION
This function validates RSA keys. It checks that p and q are prime, and
that n = p*q.
It also checks that d*e = 1 mod (p-1*q-1), and that dmp1, dmq1 and iqmp
are set correctly or are NULL.
As such, this function can not be used with any arbitrary RSA key
object, even if it is otherwise fit for regular RSA operation. See
Notes for more informaiton
NOTES
This function does not work on RSA public keys that have only the modu‐
lus and public exponent elements populated. It performs integrity
checks on all the RSA key material, so the RSA key structure must con‐
tain all the private key data.
RETURN VALUE
The RSA_check_key() function returns 1 if rsa is a valid RSA key, and 0
otherwise. If an error occurs while checking the key -1 is returned.
If the key is invalid or an error occurred, the reason code can be
obtained using the ERR_get_error() function.
HISTORY
The RSA_check_key() function appeared in OpenSSL 0.9.4.
SEE ALSO
Functions: rsa(3), err(3)RSA_check_key(3)