Switch hex_to_u32() to LE

Also fixes -m 11100 is_valid_hex_string()

src/convert.c

@@ -123,18 +123,7 @@ void exec_hexify (const u8 *buf, const int len, u8 *out)
 
   for (int i = max_len - 1, j = i * 2; i >= 0; i -= 1, j -= 2)
   {
-    const u8 v = buf[i];
-
-    u8 h0 = v >> 4 & 15;
-    u8 h1 = v >> 0 & 15;
-
-    u8 add;
-
-    h0 += 6; add = ((h0 & 0x10) >> 4) * 39; h0 += 42 + add;
-    h1 += 6; add = ((h1 & 0x10) >> 4) * 39; h1 += 42 + add;
-
-    out[j + 0] = h0;
-    out[j + 1] = h1;
+    u8_to_hex_lower (buf[i], out + j);
   }
 
   out[max_len * 2] = 0;
@@ -170,8 +159,8 @@ u8 hex_to_u8 (const u8 hex[2])
 {
   u8 v = 0;
 
-  v |= (hex_convert (hex[1]) <<  0);
-  v |= (hex_convert (hex[0]) <<  4);
+  v |= ((u8) hex_convert (hex[1]) << 0);
+  v |= ((u8) hex_convert (hex[0]) << 4);
 
   return (v);
 }
@@ -180,14 +169,14 @@ u32 hex_to_u32 (const u8 hex[8])
 {
   u32 v = 0;
 
-  v |= ((u32) hex_convert (hex[7])) <<  0;
-  v |= ((u32) hex_convert (hex[6])) <<  4;
-  v |= ((u32) hex_convert (hex[5])) <<  8;
-  v |= ((u32) hex_convert (hex[4])) << 12;
-  v |= ((u32) hex_convert (hex[3])) << 16;
-  v |= ((u32) hex_convert (hex[2])) << 20;
-  v |= ((u32) hex_convert (hex[1])) << 24;
-  v |= ((u32) hex_convert (hex[0])) << 28;
+  v |= ((u32) hex_convert (hex[1]) <<  0);
+  v |= ((u32) hex_convert (hex[0]) <<  4);
+  v |= ((u32) hex_convert (hex[3]) <<  8);
+  v |= ((u32) hex_convert (hex[2]) << 12);
+  v |= ((u32) hex_convert (hex[5]) << 16);
+  v |= ((u32) hex_convert (hex[4]) << 20);
+  v |= ((u32) hex_convert (hex[7]) << 24);
+  v |= ((u32) hex_convert (hex[6]) << 28);
 
   return (v);
 }