Add PKey::bits

1 files changed, 9 insertions, 0 deletions

diff --git a/openssl/src/pkey.rs b/openssl/src/pkey.rs
index b1c196bd..c9772d52 100644
--- a/openssl/src/pkey.rs
+++ b/openssl/src/pkey.rs
@@ -92,6 +92,15 @@ impl PKeyRef {
         Ok(mem_bio.get_buf().to_owned())
     }
 
+    /// Returns the size of the key.
+    ///
+    /// This corresponds to the bit length of the modulus of an RSA key, and the bit length of the
+    /// group order for an elliptic curve key, for example.
+    pub fn bits(&self) -> usize {
+        unsafe { ffi::EVP_PKEY_bits(self.as_ptr()) as usize }
+    }
+
+    /// Compares the public component of this key with another.
     pub fn public_eq(&self, other: &PKeyRef) -> bool {
         unsafe { ffi::EVP_PKEY_cmp(self.as_ptr(), other.as_ptr()) == 1 }
     }