Support for writing and reading manifest data from simple PDFs (without incremental updates or signatures)

sdk/Cargo.toml

@@ -34,6 +34,7 @@ no_interleaved_io = ["file_io"]
 fetch_remote_manifests = ["file_io"]
 openssl_sign = ["openssl"]
 json_schema = ["dep:schemars"]
+pdf = ["dep:lopdf"]
 
 # The diagnostics feature is unsupported and might be removed.
 # It enables some low-overhead timing features used in our development cycle.
@@ -76,6 +77,7 @@ fast-xml = "0.23.1"
 hex = "0.4.3"
 img-parts = "0.3.0"
 log = "0.4.8"
+lopdf = { version = "0.31.0", optional = true }
 lazy_static = "1.4.0"
 multibase = "0.9.0"
 multihash = "0.11.4"

sdk/src/claim.rs

@@ -1938,12 +1938,10 @@ impl Claim {
     // Do any assertions of this type exist?
     pub fn has_assertion_type(&self, in_label: &str) -> bool {
         let (label, _) = Claim::assertion_label_from_link(in_label);
-        let found = self
-            .assertion_store
-            .iter()
-            .find(|&x| x.assertion.label().starts_with(&label));
 
-        found.is_some()
+        self.assertion_store
+            .iter()
+            .any(|x| x.assertion.label().starts_with(&label))
     }
 
     // Create a JUMBF URI from a claim label.

sdk/src/utils/mod.rs

@@ -18,6 +18,8 @@ pub(crate) mod hash_utils;
 pub(crate) mod merkle;
 #[allow(dead_code)] // for wasm build
 pub(crate) mod patch;
+#[cfg(feature = "pdf")]
+pub(crate) mod pdf_utils;
 #[cfg(feature = "add_thumbnails")]
 pub(crate) mod thumbnail;
 pub(crate) mod time_it;