1 files changed, 4 insertions, 0 deletions
diff --git a/src/lib/pubkey/pk_ops.h b/src/lib/pubkey/pk_ops.h
index 3e38cc8ca..3f794f00d 100644
--- a/src/lib/pubkey/pk_ops.h
+++ b/src/lib/pubkey/pk_ops.h
@@ -42,6 +42,8 @@ class BOTAN_PUBLIC_API(2,0) Encryption
 
       virtual size_t max_input_bits() const = 0;
 
+      virtual size_t ciphertext_length(size_t ptext_len) const = 0;
+
       virtual ~Encryption() = default;
    };
 
@@ -55,6 +57,8 @@ class BOTAN_PUBLIC_API(2,0) Decryption
                                           const uint8_t ciphertext[],
                                           size_t ciphertext_len) = 0;
 
+      virtual size_t plaintext_length(size_t ctext_len) const = 0;
+
       virtual ~Decryption() = default;
    };