Fix cargo registry index paths for big-endian architectures (#574)

The hexadecimal part of cargo index paths is different on little- and big-endian architectures. See also EmbarkStudios/tame-index#36 I have verified that the endianness-specific `CRATES_IO_SPARSE_DIR` definition is correct and indeed matches what cargo writes to on big-endian architectures.
EmbarkStudios · Nov 7, 2023 · 2f5300f · 2f5300f
1 parent 6a26873
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diff --git a/src/advisories/helpers/db.rs b/src/advisories/helpers/db.rs
@@ -742,26 +742,50 @@ mod test {
 
         {
             let url = Url::parse("https://github.com/RustSec/advisory-db").unwrap();
+
+            #[cfg(target_endian = "little")]
             assert_eq!(
                 url_to_db_path(root_path.clone(), &url).unwrap(),
                 root_path.join("github.com-a946fc29ac602819")
             );
+
+            #[cfg(target_endian = "big")]
+            assert_eq!(
+                url_to_db_path(root_path.clone(), &url).unwrap(),
+                root_path.join("github.com-f4edf1c00e90fd42")
+            );
         }
 
         {
             let url = Url::parse("https://bare.com").unwrap();
+
+            #[cfg(target_endian = "little")]
             assert_eq!(
                 url_to_db_path(root_path.clone(), &url).unwrap(),
                 root_path.join("bare.com-9c003d1ed306b28c")
             );
+
+            #[cfg(target_endian = "big")]
+            assert_eq!(
+                url_to_db_path(root_path.clone(), &url).unwrap(),
+                root_path.join("bare.com-c9767e4ee31501de")
+            );
         }
 
         {
             let url = Url::parse("https://example.com/countries/việt nam").unwrap();
+
+            #[cfg(target_endian = "little")]
             assert_eq!(
                 url_to_db_path(root_path.clone(), &url).unwrap(),
                 root_path.join("example.com-1c03f84825fb7438")
             );
+
+            #[cfg(target_endian = "big")]
+            assert_eq!(
+                url_to_db_path(root_path.clone(), &url).unwrap(),
+                root_path.join("example.com-5ebf17a6f3e576f0")
+            );
         }
     }
 }
diff --git a/src/lib.rs b/src/lib.rs
@@ -62,7 +62,10 @@ pub enum Source {
 
 /// The directory name under which crates sourced from the crates.io sparse
 /// registry are placed
+#[cfg(target_endian = "little")]
 const CRATES_IO_SPARSE_DIR: &str = "index.crates.io-6f17d22bba15001f";
+#[cfg(target_endian = "big")]
+const CRATES_IO_SPARSE_DIR: &str = "index.crates.io-d11c229612889eed";
 
 impl Source {
     pub fn crates_io(is_sparse: bool) -> Self {