Add function to return the size of a key agreement output

Very useful when using "Raw" DH/ECDH via the FFI API.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/lib/pubkey/pubkey.cpp b/src/lib/pubkey/pubkey.cpp
index fef81a620..bb0170548 100644
--- a/src/lib/pubkey/pubkey.cpp
+++ b/src/lib/pubkey/pubkey.cpp
@@ -210,6 +210,11 @@ PK_Key_Agreement::PK_Key_Agreement(PK_Key_Agreement&& other) :
    m_op(std::move(other.m_op))
    {}
 
+size_t PK_Key_Agreement::agreed_value_size() const
+   {
+   return m_op->agreed_value_size();
+   }
+
 SymmetricKey PK_Key_Agreement::derive_key(size_t key_len,
                                           const uint8_t in[], size_t in_len,
                                           const uint8_t salt[],