"Decrypt" unencrypted

iguana/exchanges/LP_privkey.c

@@ -571,14 +571,23 @@ uint8_t *JPG_decrypt(uint16_t *indp,int32_t *recvlenp,uint8_t space[JPG_ENCRYPTE
 int32_t LP_opreturn_decrypt(uint16_t *ind16p,uint8_t *decoded,uint8_t *encoded,int32_t encodedlen,char *passphrase)
 {
     bits256 privkey; int32_t msglen; uint8_t *extracted,space[JPG_ENCRYPTED_MAXSIZE + crypto_box_ZEROBYTES];
-    vcalc_sha256(0,privkey.bytes,(uint8_t *)passphrase,(int32_t)strlen(passphrase));
-    msglen = ((int32_t)encoded[1] << 8) | encoded[0];
-    *ind16p = ((int32_t)encoded[3] << 8) | encoded[2];
-    if ( msglen == encodedlen && (extracted= JPG_decrypt(ind16p,&msglen,space,encoded,privkey)) != 0 )
+    if ( passphrase != 0 && passphrase[0] != 0 )
+    {
+        vcalc_sha256(0,privkey.bytes,(uint8_t *)passphrase,(int32_t)strlen(passphrase));
+        msglen = ((int32_t)encoded[1] << 8) | encoded[0];
+        *ind16p = ((int32_t)encoded[3] << 8) | encoded[2];
+        if ( msglen == encodedlen && (extracted= JPG_decrypt(ind16p,&msglen,space,encoded,privkey)) != 0 )
+        {
+            memcpy(decoded,extracted,msglen);
+            return(msglen);
+        } else return(-1);
+    }
+    else
     {
-        memcpy(decoded,extracted,msglen);
-        return(msglen);
-    } else return(-1);
+        *ind16p = calc_crc32(0,extracted,encodedlen);
+        memcpy(decoded,extracted,encodedlen);
+        return(encodedlen);
+    }
 }
 
 int32_t LP_opreturn_encrypt(uint8_t *dest,int32_t maxsize,uint8_t *data,int32_t datalen,char *passphrase,uint16_t ind16)