openpgp: Add accessors for the underlying Bitfields.

  - Fixes #775.

5 files changed, 39 insertions, 0 deletions

diff --git a/openpgp/NEWS b/openpgp/NEWS
index ae196d0a..3c734164 100644
--- a/openpgp/NEWS
+++ b/openpgp/NEWS
@@ -34,6 +34,9 @@
    - parse::PacketParserBuilder::automatic_hashing
    - types::AEADAlgorithm::GCM
    - types::Bitfield
+   - types::Features::as_bitfield
+   - types::KeyFlags::as_bitfield
+   - types::KeyServerPreferences::as_bitfield
 ** Deprecated functionality
    - cert::Preferences::preferred_aead_algorithms
    - packet::signature::SignatureBuilder::set_preferred_aead_algorithms
diff --git a/openpgp/src/packet/signature/subpacket.rs b/openpgp/src/packet/signature/subpacket.rs
index 6f341b0e..45e1d5ab 100644
--- a/openpgp/src/packet/signature/subpacket.rs
+++ b/openpgp/src/packet/signature/subpacket.rs
@@ -1334,6 +1334,12 @@ impl NotationDataFlags {
         Self::new(&[0, 0, 0, 0]).unwrap()
     }
 
+    /// Returns a reference to the underlying
+    /// [`Bitfield`](crate::types::Bitfield).
+    pub fn as_bitfield(&self) -> &crate::types::Bitfield {
+        &self.0
+    }
+
     /// Returns a slice containing the raw values.
     pub(crate) fn as_slice(&self) -> &[u8] {
         self.0.as_bytes()
diff --git a/openpgp/src/types/features.rs b/openpgp/src/types/features.rs
index 4d5ac748..65144e25 100644
--- a/openpgp/src/types/features.rs
+++ b/openpgp/src/types/features.rs
@@ -116,6 +116,16 @@ impl Features {
         Self::new(&v[..]).set_mdc()
     }
 
+    /// Returns a reference to the underlying [`Bitfield`].
+    pub fn as_bitfield(&self) -> &Bitfield {
+        &self.0
+    }
+
+    /// Returns a mutable reference to the underlying [`Bitfield`].
+    pub fn as_bitfield_mut(&mut self) -> &mut Bitfield {
+        &mut self.0
+    }
+
     /// Compares two feature sets for semantic equality.
     ///
     /// `Features`' implementation of `PartialEq` compares two feature
diff --git a/openpgp/src/types/key_flags.rs b/openpgp/src/types/key_flags.rs
index cc95ff2e..aa8f12f0 100644
--- a/openpgp/src/types/key_flags.rs
+++ b/openpgp/src/types/key_flags.rs
@@ -160,6 +160,16 @@ impl KeyFlags {
         KeyFlags::new(&[])
     }
 
+    /// Returns a reference to the underlying [`Bitfield`].
+    pub fn as_bitfield(&self) -> &Bitfield {
+        &self.0
+    }
+
+    /// Returns a mutable reference to the underlying [`Bitfield`].
+    pub fn as_bitfield_mut(&mut self) -> &mut Bitfield {
+        &mut self.0
+    }
+
     /// Returns a slice containing the raw values.
     pub(crate) fn as_bytes(&self) -> &[u8] {
         self.0.as_bytes()
diff --git a/openpgp/src/types/server_preferences.rs b/openpgp/src/types/server_preferences.rs
index b3a19fae..ef989bf6 100644
--- a/openpgp/src/types/server_preferences.rs
+++ b/openpgp/src/types/server_preferences.rs
@@ -98,6 +98,16 @@ impl KeyServerPreferences {
         Self::new(&[])
     }
 
+    /// Returns a reference to the underlying [`Bitfield`].
+    pub fn as_bitfield(&self) -> &Bitfield {
+        &self.0
+    }
+
+    /// Returns a mutable reference to the underlying [`Bitfield`].
+    pub fn as_bitfield_mut(&mut self) -> &mut Bitfield {
+        &mut self.0
+    }
+
     /// Returns a slice containing the raw values.
     pub(crate) fn as_bytes(&self) -> &[u8] {
         self.0.as_bytes()