Added check of assumed memory layout

Author: yobson

src/validate.c

@@ -137,6 +137,10 @@ int main(int argc,char **argv)	{
         fprintf(stderr, "ELF section %s not found, is the file signed?\n", segment_key_name);
         exit(1);
     }
+    if(skip_offset_sig + skip_length_sig != skip_offset_key) {
+      fprintf(stderr, "Validate only worlds when .sha256_sig and .sig_key are next to one another in the ELF\n");
+      exit(0);
+    }
     int skip_offset = skip_offset_sig;
     int skip_length = skip_length_sig + skip_length_key;