Fix various MSVC warnings

Based on VC2017 output

2 files changed, 2 insertions, 2 deletions

diff --git a/src/lib/ffi/ffi_cipher.cpp b/src/lib/ffi/ffi_cipher.cpp
index 6bb45dec8..72fa2eec8 100644
--- a/src/lib/ffi/ffi_cipher.cpp
+++ b/src/lib/ffi/ffi_cipher.cpp
@@ -100,7 +100,7 @@ int botan_cipher_update(botan_cipher_t cipher_obj,
             {
             cipher.finish(mbuf);
             }
-         catch(Integrity_Failure& e)
+         catch(Integrity_Failure&)
             {
             return BOTAN_FFI_ERROR_BAD_MAC;
             }
diff --git a/src/lib/ffi/ffi_kdf.cpp b/src/lib/ffi/ffi_kdf.cpp
index 058c4c655..4eca31773 100644
--- a/src/lib/ffi/ffi_kdf.cpp
+++ b/src/lib/ffi/ffi_kdf.cpp
@@ -76,7 +76,7 @@ int botan_bcrypt_generate(uint8_t* out, size_t* out_len,
          throw FFI_Error("Bad bcrypt work factor " + std::to_string(wf));
 
       Botan::RandomNumberGenerator& rng = safe_get(rng_obj);
-      const std::string bcrypt = Botan::generate_bcrypt(pass, rng, wf);
+      const std::string bcrypt = Botan::generate_bcrypt(pass, rng, static_cast<uint16_t>(wf));
       return write_str_output(out, out_len, bcrypt);
       });
 #else