openpgp: Make struct MPI opaque.

1 files changed, 12 insertions, 2 deletions

diff --git a/openpgp/src/crypto/mpis.rs b/openpgp/src/crypto/mpis.rs
index d93223ca..c1871619 100644
--- a/openpgp/src/crypto/mpis.rs
+++ b/openpgp/src/crypto/mpis.rs
@@ -23,9 +23,9 @@ use nettle;
 #[derive(Clone, Hash)]
 pub struct MPI {
     /// Length of the integer in bits.
-    pub bits: usize,
+    bits: usize,
     /// Integer value as big-endian.
-    pub value: Box<[u8]>,
+    value: Box<[u8]>,
 }
 
 impl From<Vec<u8>> for MPI {
@@ -73,6 +73,16 @@ impl MPI {
         }
     }
 
+    /// Returns the length of the MPI in bits.
+    pub fn bits(&self) -> usize {
+        self.bits
+    }
+
+    /// Returns the value of this MPI.
+    pub fn value(&self) -> &[u8] {
+        &self.value
+    }
+
     /// Update the Hash with a hash of the MPIs.
     pub fn hash<H: nettle::Hash>(&self, hash: &mut H) {
         let len = &[(self.bits >> 8) as u8 & 0xFF, self.bits as u8];