add additional checks + cleanup

[openssl.git] / engines / e_cswift.c

diff --git a/engines/e_cswift.c b/engines/e_cswift.c
index e67379e23e62c1c9ff6a51044c642af51d6335bb..bc6517984649850c6ccb3d32f9b3af5c44a5c909 100644 (file)
--- a/engines/e_cswift.c
+++ b/engines/e_cswift.c
@@ -744,6 +744,12 @@ static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx
        int to_return = 0;
        const RSA_METHOD * def_rsa_method;
 
+       if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
+               {
+               CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,CSWIFT_R_MISSING_KEY_COMPONENTS);
+               goto err;
+               }
+
        /* Try the limits of RSA (2048 bits) */
        if(BN_num_bytes(rsa->p) > 128 ||
                BN_num_bytes(rsa->q) > 128 ||
@@ -764,11 +770,6 @@ static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa, BN_CTX *ctx
                        return def_rsa_method->rsa_mod_exp(r0, I, rsa, ctx);
        }
 
-       if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
-               {
-               CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,CSWIFT_R_MISSING_KEY_COMPONENTS);
-               goto err;
-               }
        to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
                rsa->dmq1, rsa->iqmp, ctx);
 err: