Fixed OER length encoding

src/libasn1/oer_decode.c

@@ -56,22 +56,24 @@ uint oer_get_length(OER_Stream *oer, uint *value) {
   if (!oer)
     return 0;
   
-  int len = *oer->ptr++;
-  int val = len & 0x7f;
-  int size = 1;
-
-  // if length > 127
-  if (len & 0x80) {
-    // slurp
-    val <<= 8;
-    val |= *oer->ptr++;
-    size = 2;
-  }
+  uint len = *oer->ptr++;
+  uint size = 1;
+  uint val = 0;
   
+  if (len & 0x80) {
+    len &= 0x7f;
+    size += len;
+    while (len--) {
+      val <<= 8;
+      val |= *oer->ptr++;
+    }
+  }
+  else
+    val = len & 0x7f;
+ 
   if (value)
     *value = val;
-  size *= 8;
-  oer->consumed += size;
+  oer->consumed += (size*8);
   return val;
 }
 

src/libasn1/oer_encode.c

@@ -57,14 +57,17 @@ uint oer_put_length(OER_Stream *oer, uint value)
   if (!oer || !oer->ptr)
     return 0;
 
-  int size = 8;
+  int size = 1;
   if (value > 0x7f) {
-      *oer->ptr++ = (value >> 8) | 0x80; 
-      size = 16;
+    *oer->ptr++ = 0x82;
+    *oer->ptr++ = value >> 8;
+    *oer->ptr++ = value;
+    size += 2;
   }
-  *oer->ptr++ = value & 0xff;
+  else
+    *oer->ptr++ = value & 0x7f;
   
-  oer->consumed += size;
+  oer->consumed += (size*8);
   return size;
 }