EVP: Check that key methods aren't foreign when exporting

[openssl.git] / crypto / rsa / rsa_ameth.c

diff --git a/crypto/rsa/rsa_ameth.c b/crypto/rsa/rsa_ameth.c
index f34eacf552b2478c2fd25b92ed62e704da326cf7..3411b734e5e9d415c1eb06c93f90f7770b0e19e0 100644 (file)
--- a/crypto/rsa/rsa_ameth.c
+++ b/crypto/rsa/rsa_ameth.c
@@ -1092,6 +1092,13 @@ static int rsa_pkey_export_to(const EVP_PKEY *from, void *to_keydata,
     OSSL_PARAM *params = NULL;
     int rv = 0;
 
+    /*
+     * If the RSA method is foreign, then we can't be sure of anything, and
+     * can therefore not export or pretend to export.
+     */
+    if (RSA_get_method(rsa) != RSA_PKCS1_OpenSSL())
+        return 0;
+
     /* Public parameters must always be present */
     if (n == NULL || e == NULL)
         goto err;