bindings: Create 32b compatible bindings

Signed-off-by: Jakub Jelen <[email protected]>

build.rs

@@ -162,6 +162,7 @@ fn main() {
         .blocklist_type("CK_FUNCTION_LIST_PTR")
         .blocklist_type("CK_FUNCTION_LIST_3_0_PTR")
         .blocklist_type("CK_INTERFACE")
+        .blocklist_var("CK_UNAVAILABLE_INFORMATION")
         .parse_callbacks(Box::new(Pkcs11Callbacks))
         .generate()
         .expect("Unable to generate bindings")

src/pkcs11/interface.rs

@@ -6,6 +6,14 @@ include!("bindings.rs");
 // types that need different mutability than bindgen provides
 pub type CK_FUNCTION_LIST_PTR = *const CK_FUNCTION_LIST;
 pub type CK_FUNCTION_LIST_3_0_PTR = *const CK_FUNCTION_LIST_3_0;
+// this is wrongly converted on 32b architecture to too large value
+// which can not be represented in CK_ULONG. Docs says it can't have
+// any other value so enumerate them here:
+// https://doc.rust-lang.org/std/os/raw/type.c_ulong.html
+#[cfg(target_pointer_width = "64")]
+pub const CK_UNAVAILABLE_INFORMATION: CK_ULONG = u64::MAX;
+#[cfg(target_pointer_width = "32")]
+pub const CK_UNAVAILABLE_INFORMATION: CK_ULONG = u32::MAX;
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
 pub struct CK_INTERFACE {