RSA_get0_e
bn = RSA_get0_e(EVP_PKEY_get0_RSA(ctx->p2));
if (RSA_get0_n(rsa) == NULL || RSA_get0_e(rsa) == NULL)
OSSL_DEPRECATEDIN_3_0 const BIGNUM *RSA_get0_e(const RSA *d);
ok = ok && (RSA_get0_e(rsa) != NULL);
ok = ok && BN_cmp(RSA_get0_e(rsa1), RSA_get0_e(rsa2)) == 0;