ffi: Move KeyID glue to a new module.

1 files changed, 91 insertions, 0 deletions

diff --git a/ffi/src/openpgp/keyid.rs b/ffi/src/openpgp/keyid.rs
new file mode 100644
index 00000000..ed4bb11e
--- /dev/null
+++ b/ffi/src/openpgp/keyid.rs
@@ -0,0 +1,91 @@
+//! Handles KeyIDs.
+//!
+//! Wraps [`sequoia-openpgp::KeyID`].
+//!
+//! [`sequoia-openpgp::KeyID`]: ../../../sequoia_openpgp/enum.KeyID.html
+
+use std::ffi::{CString, CStr};
+use std::hash::{Hash, Hasher};
+use std::ptr;
+use std::slice;
+use libc::{uint8_t, uint64_t, c_char};
+
+extern crate sequoia_openpgp;
+use self::sequoia_openpgp::KeyID;
+
+use build_hasher;
+
+/// Reads a binary key ID.
+#[no_mangle]
+pub extern "system" fn sq_keyid_from_bytes(id: *const uint8_t) -> *mut KeyID {
+    assert!(!id.is_null());
+    let id = unsafe { slice::from_raw_parts(id, 8) };
+    Box::into_raw(Box::new(KeyID::from_bytes(id)))
+}
+
+/// Reads a hex-encoded Key ID.
+#[no_mangle]
+pub extern "system" fn sq_keyid_from_hex(id: *const c_char) -> *mut KeyID {
+    assert!(!id.is_null());
+    let id = unsafe { CStr::from_ptr(id).to_string_lossy() };
+    KeyID::from_hex(&id)
+        .map(|id| Box::into_raw(Box::new(id)))
+        .unwrap_or(ptr::null_mut())
+}
+
+/// Frees an `KeyID` object.
+#[no_mangle]
+pub extern "system" fn sq_keyid_free(keyid: *mut KeyID) {
+    if keyid.is_null() { return }
+    unsafe {
+        drop(Box::from_raw(keyid));
+    }
+}
+
+/// Clones the KeyID.
+#[no_mangle]
+pub extern "system" fn sq_keyid_clone(id: Option<&KeyID>)
+                                      -> *mut KeyID {
+    let id = id.expect("KeyID is NULL");
+    box_raw!(id.clone())
+}
+
+/// Hashes the KeyID.
+#[no_mangle]
+pub extern "system" fn sq_keyid_hash(id: Option<&KeyID>)
+                                     -> uint64_t {
+    let id = id.expect("KeyID is NULL");
+    let mut hasher = build_hasher();
+    id.hash(&mut hasher);
+    hasher.finish()
+}
+
+/// Converts the KeyID to its standard representation.
+#[no_mangle]
+pub extern "system" fn sq_keyid_to_string(id: Option<&KeyID>)
+                                          -> *mut c_char {
+    let id = id.expect("KeyID is NULL");
+    CString::new(id.to_string())
+        .unwrap() // Errors only on internal nul bytes.
+        .into_raw()
+}
+
+/// Converts the KeyID to a hexadecimal number.
+#[no_mangle]
+pub extern "system" fn sq_keyid_to_hex(id: Option<&KeyID>)
+                                       -> *mut c_char {
+    let id = id.expect("KeyID is NULL");
+    CString::new(id.to_hex())
+        .unwrap() // Errors only on internal nul bytes.
+        .into_raw()
+}
+
+/// Compares KeyIDs.
+#[no_mangle]
+pub extern "system" fn sq_keyid_equal(a: Option<&KeyID>,
+                                      b: Option<&KeyID>)
+                                      -> bool {
+    let a = a.expect("KeyID 'a' is NULL");
+    let b = b.expect("KeyID 'b' is NULL");
+    a == b
+}