ML-DSA Wconversion fixes

Author: Frauschi

wolfcrypt/src/asn.c

@@ -17057,7 +17057,7 @@ int ConfirmSignature(SignatureCtx* sigCtx,
                         goto exit_cs;
                     }
                     if ((ret = wc_dilithium_set_level(sigCtx->key.dilithium,
-                            level)) < 0) {
+                            (byte)level)) < 0) {
                         goto exit_cs;
                     }
                     if ((ret = wc_Dilithium_PublicKeyDecode(key, &idx,
@@ -27780,7 +27780,7 @@ static int MakeSignature(CertSignCtx* certSignCtx, const byte* buf, word32 sz,
         word32 outSz = sigSz;
         ret = wc_falcon_sign_msg(buf, sz, sig, &outSz, falconKey, rng);
         if (ret == 0)
-            ret = outSz;
+            ret = (int)outSz;
     }
 #endif /* HAVE_FALCON */
 
@@ -27793,15 +27793,15 @@ static int MakeSignature(CertSignCtx* certSignCtx, const byte* buf, word32 sz,
                 (dilithiumKey->params->level == WC_ML_DSA_87_DRAFT)) {
             ret = wc_dilithium_sign_msg(buf, sz, sig, &outSz, dilithiumKey, rng);
             if (ret == 0)
-                ret = outSz;
+                ret = (int)outSz;
         }
         else
         #endif
         {
             ret = wc_dilithium_sign_ctx_msg(NULL, 0, buf, sz, sig,
                 &outSz, dilithiumKey, rng);
             if (ret == 0)
-                ret = outSz;
+                ret = (int)outSz;
         }
     }
 #endif /* HAVE_DILITHIUM && !WOLFSSL_DILITHIUM_NO_SIGN */