Add PK_Decryptor::decrypt_or_random

Performs content checks on the value (expected length, expected bytes)
and in constant time returns either the decrypted value or a random value.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/lib/pubkey/pk_ops.h b/src/lib/pubkey/pk_ops.h
index 6fc21ea4a..712b8c457 100644
--- a/src/lib/pubkey/pk_ops.h
+++ b/src/lib/pubkey/pk_ops.h
@@ -68,7 +68,9 @@ class BOTAN_DLL Decryption
 
       virtual size_t max_input_bits() const = 0;
 
-      virtual secure_vector<byte> decrypt(const byte msg[],  size_t msg_len) = 0;
+      virtual secure_vector<byte> decrypt(byte& valid_mask,
+                                          const byte ciphertext[],
+                                          size_t ciphertext_len) = 0;
 
       virtual ~Decryption() {}
    };