NAME
RSA_check_key_ex, RSA_check_key - validate private RSA keys
SYNOPSIS
#include <openssl/rsa.h>
Deprecated since OpenSSL 3.0, can be hidden entirely by defining OPENSSL_API_COMPAT with a suitable version value, see int RSA_check_key_ex(RSA *rsa, BN_GENCB *cb);
int RSA_check_key(RSA *rsa);
Both of the functions described on this page are deprecated. Applications should instead use EVP_PKEY_private_check(3) and BN_is_prime_ex(3). RSA_check_key() is equivalent to RSA_check_key_ex() with a NULL cb. RSA_check_key_ex() and RSA_check_key() return 1 if rsa is a valid RSA key, and 0 otherwise. They return -1 if an error occurs while checking the key. If the key is invalid or an error occurred, the reason code can be obtained using NOTES
Unlike most other RSA functions, this function does not work transparently with any underlying ENGINE implementation because it uses the key data in the RSA structure directly. An ENGINE implementation can override the way key data is stored and handled, and can even provide support for HSM keys - in which case the RSA structure may contain no key data at all! If the ENGINE in question is only being used for acceleration or analysis purposes, then in all likelihood the RSA key data is complete and untouched, but this can't be assumed in the general case. A method of verifying the RSA key using opaque RSA API functions might need to be considered. Right now RSA_check_key() simply uses the RSA structure elements directly, bypassing the RSA_METHOD table altogether (and completely violating encapsulation and object-orientation in the process). The best fix will probably be to introduce a "check_key()" handler to the RSA_METHOD function table so that alternative implementations can also provide their own verifiers. All of these functions were deprecated in OpenSSL 3.0. RSA_check_key_ex() appeared after OpenSSL 1.0.2. Copyright 2000-2020 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 https://www.openssl.org/source/license.html.DESCRIPTION
RETURN VALUES
BUGS
SEE ALSO
HISTORY
COPYRIGHT