Make sure valid privkey

iguana/exchanges/LP_privkey.c

@@ -254,7 +254,7 @@ int32_t LP_wifstr_valid(char *symbol,char *wifstr)
 bits256 LP_privkeycalc(void *ctx,uint8_t *pubkey33,bits256 *pubkeyp,struct iguana_info *coin,char *passphrase,char *wifstr)
 {
     //static uint32_t counter;
-    bits256 privkey,userpub,zero,userpass,checkkey,tmpkey; char tmpstr[128]; cJSON *retjson; uint8_t tmptype; int32_t notarized; uint64_t nxtaddr;
+    bits256 privkey,userpub,zero,userpass,checkkey,tmpkey; char tmpstr[128]; cJSON *retjson; uint8_t tmptype,sig[128]; int32_t notarized; uint64_t nxtaddr;
     if ( (wifstr == 0 || wifstr[0] == 0) && LP_wifstr_valid(coin->symbol,passphrase) > 0 )
     {
         wifstr = passphrase;
@@ -293,6 +293,12 @@ bits256 LP_privkeycalc(void *ctx,uint8_t *pubkey33,bits256 *pubkeyp,struct iguan
         nxtaddr = conv_NXTpassword(tmpkey.bytes,pubkeyp->bytes,0,0);
         RS_encode(G.LP_NXTaddr,nxtaddr);
     }
+    OS_randombytes(tmpkey.bytes,sizeof(tmpkey));
+    if ( bits256_nonz(privkey) == 0 || bitcoin_sign(ctx,coin->symbol,sig,tmpkey,privkey,0) <= 0 )
+    {
+        char str[65]; printf("illegal privkey %s\n",bits256_str(str,privkey));
+        exit(0);
+    }
     bitcoin_priv2pub(ctx,coin->symbol,coin->pubkey33,coin->smartaddr,privkey,coin->taddr,coin->pubtype);
     if ( coin->counter == 0 )
     {

iguana/exchanges/LP_secp.c

@@ -95,7 +95,7 @@ int32_t bitcoin_sign(void *ctx,char *symbol,uint8_t *sig,bits256 txhash2,bits256
         if ( secp256k1_ec_seckey_verify(ctx,privkey.bytes) == 0 )
         {
             printf("bitcoin_sign illegal privkey\n");
-            //return(-1);
+            return(-1);
         }
         if ( strcmp(symbol,"BCH") == 0 || strcmp(symbol,"BTG") == 0 )
         {

iguana/exchanges/LP_transaction.c

@@ -425,23 +425,23 @@ int32_t bitcoin_verifyvins(void *ctx,char *symbol,uint8_t taddr,uint8_t pubtype,
             {
                 sig = vp->signers[j].sig;
                 siglen = vp->signers[j].siglen;
-                if ( signtx != 0 )//&& bits256_nonz(vp->signers[j].privkey) != 0 )
+                if ( signtx != 0 && bits256_nonz(vp->signers[j].privkey) != 0 )
                 {
                     siglen = bitcoin_sign(ctx,symbol,sig,sigtxid,vp->signers[j].privkey,0);
                     //if ( (plen= bitcoin_pubkeylen(vp->signers[j].pubkey)) <= 0 )
                     bitcoin_pubkey33(ctx,vp->signers[j].pubkey,vp->signers[j].privkey);
                     sig[siglen++] = sighash;
                     vp->signers[j].siglen = siglen;
-                    char str[65]; printf("SIGTXID.(%s) ",bits256_str(str,sigtxid));
+                    /*char str[65]; printf("SIGTXID.(%s) ",bits256_str(str,sigtxid));
                      int32_t i; for (i=0; i<siglen; i++)
                      printf("%02x",sig[i]);
                      printf(" sig, ");
                      for (i=0; i<33; i++)
                      printf("%02x",vp->signers[j].pubkey[i]);
                      // s2 = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1;
-                     printf(" SIGNEDTX.[%02x] siglen.%d priv.%s\n",sig[siglen-1],siglen,bits256_str(str,vp->signers[j].privkey));
+                     printf(" SIGNEDTX.[%02x] siglen.%d priv.%s\n",sig[siglen-1],siglen,bits256_str(str,vp->signers[j].privkey));*/
                 }
-                if ( sig == 0 || siglen <= 0 )
+                if ( sig == 0 || siglen == 0 )
                 {
                     memset(vp->signers[j].pubkey,0,sizeof(vp->signers[j].pubkey));
                     char str[65]; printf("no sig.%p or siglen.%d zero priv.(%s)\n",sig,siglen,bits256_str(str,vp->signers[j].privkey));