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feat(sdk): Introduce new API to retrieve certificates from C2paReader #1446

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feat(sdk): Introduce new API to retrieve certificates from C2paReader #1446

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feat(sdk): Introduce new API to retrieve certificates from C2paReader
magaylor Sep 24, 2025
cd31fcc
Merge branch 'main' into user/magaylor/add_cert_chain_to_c_api
magaylor Sep 24, 2025
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20 changes: 20 additions & 0 deletions c2pa_c_ffi/src/c_api.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -677,6 +677,23 @@ pub unsafe extern "C" fn c2pa_reader_detailed_json(reader_ptr: *mut C2paReader)
to_c_string(c2pa_reader.detailed_json())
}

/// Returns the certificate chain found in the active manifest from a C2paReader.
///
/// # Safety
/// The returned value MUST be released by calling c2pa_string_free
/// and it is no longer valid after that call.
#[no_mangle]
pub unsafe extern "C" fn c2pa_certs_from_reader(reader_ptr: *mut C2paReader) -> *mut c_char {
check_or_return_null!(reader_ptr);
let c2pa_reader = guard_boxed!(reader_ptr);
if let Some(manifest) = c2pa_reader.active_manifest() {
if let Some(si) = manifest.signature_info() {
return to_c_string(si.cert_chain().to_string());
}
}
std::ptr::null_mut()
}

/// Returns the remote url of the manifest if it was obtained remotely.
///
/// # Parameters
Expand Down Expand Up @@ -1700,6 +1717,9 @@ mod tests {
assert!(json_content.contains("manifest"));
assert!(json_content.contains("com.example.test-action"));

let certs = unsafe { c2pa_certs_from_reader(reader) };
assert!(!certs.is_null());

TestC2paStream::drop_c_stream(source_stream);
TestC2paStream::drop_c_stream(read_stream);
unsafe {
Expand Down