rust/pv_*: Add more deny lints to pv and pv_core

Denies compiling if one of the following lints find something in pv or
pv_core:
    missing_docs,
    missing_debug_implementations,
    trivial_numeric_casts,
    unstable_features,
    unused_import_braces,
    unused_qualifications

Those lint force developers to avoid unnecessary code and providing
debuggability & documentation for each public symbol.

Fix the compile time error introduced with those lints.

Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>

rust/pv/src/brcb.rs

@@ -46,6 +46,7 @@ impl TryFrom<Vec<u8>> for BootHdrTags {
 }
 
 /// Magic value for a SE-(boot)header
+#[derive(Debug)]
 pub struct BootHdrMagic;
 impl MagicValue<8> for BootHdrMagic {
     const MAGIC: [u8; 8] = [0x49, 0x42, 0x4d, 0x53, 0x65, 0x63, 0x45, 0x78];

rust/pv/src/lib.rs

@@ -2,7 +2,14 @@
 //
 // Copyright IBM Corp. 2023, 2024
 
-#![deny(missing_docs)]
+#![deny(
+    missing_docs,
+    missing_debug_implementations,
+    trivial_numeric_casts,
+    unstable_features,
+    unused_import_braces,
+    unused_qualifications
+)]
 #![doc = include_str!("../README.md")]
 //! # Manage guest secret store
 //!

rust/pv/src/openssl_extensions/stackable_crl.rs

@@ -111,7 +111,7 @@ impl StackableX509Crl {
                 );
                 if r.is_null() {
                     let err = openssl_sys::ERR_peek_last_error();
-                    if openssl_sys::ERR_GET_LIB(err) as c_int == openssl_sys::ERR_LIB_PEM
+                    if openssl_sys::ERR_GET_LIB(err) == openssl_sys::ERR_LIB_PEM
                         && openssl_sys::ERR_GET_REASON(err) == openssl_sys::PEM_R_NO_START_LINE
                     {
                         openssl_sys::ERR_clear_error();

rust/pv/src/req.rs

@@ -54,6 +54,7 @@ pub trait Encrypt {
 }
 
 /// Types of Authenticated Data
+#[allow(missing_debug_implementations)]
 pub enum Aad<'a> {
     /// Authenticated Keyslot
     Ks(&'a Keyslot),
@@ -207,7 +208,7 @@ impl ReqEncrCtx {
         let mut auth_data: Vec<u8> = Vec::with_capacity(2048);
 
         // reserve space for the request header
-        auth_data.resize(std::mem::size_of::<RequestHdr>(), 0);
+        auth_data.resize(size_of::<RequestHdr>(), 0);
 
         for a in aad {
             match a {
@@ -229,7 +230,7 @@ impl ReqEncrCtx {
 
         let req_hdr = RequestHdr::new(version, rql, self.iv, nks, sea, magic);
         // copy request header to the start of the request
-        auth_data[..std::mem::size_of::<RequestHdr>()].copy_from_slice(req_hdr.as_bytes());
+        auth_data[..size_of::<RequestHdr>()].copy_from_slice(req_hdr.as_bytes());
         Ok(auth_data)
     }
 

rust/pv/src/test_utils.rs

@@ -30,7 +30,7 @@ macro_rules! get_test_asset {
 }
 
 pub fn get_cert_asset_path<P: AsRef<Path>>(path: P) -> PathBuf {
-    let mut p = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    let mut p = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
     p.push("tests");
     p.push("assets");
     p.push("cert");

rust/pv/src/verify/helper.rs

@@ -261,7 +261,7 @@ fn load_crl_to_store(
     x509_store: &mut X509StoreBuilder,
     path: &Path,
     err_out_empty_crl: bool,
-) -> std::result::Result<(), openssl::error::ErrorStack> {
+) -> std::result::Result<(), ErrorStack> {
     let lu = x509_store.add_lookup(X509Lookup::<File>::file())?;
     // Try to load cert as PEM file
     if lu.load_crl_file(path, SslFiletype::PEM).is_err() {