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-rw-r--r--cxx/include/aesnixx/mode.hpp17
1 files changed, 17 insertions, 0 deletions
diff --git a/cxx/include/aesnixx/mode.hpp b/cxx/include/aesnixx/mode.hpp
index 9bcbbd5..a0af051 100644
--- a/cxx/include/aesnixx/mode.hpp
+++ b/cxx/include/aesnixx/mode.hpp
@@ -24,8 +24,25 @@ namespace aesni
struct ModeRequiresInitializationVector<AESNI_ECB> : public std::false_type
{ };
+ template <Mode mode>
+ struct ModeUsesEncryptionKeysOnly : public std::true_type
+ { };
+
inline bool mode_requires_initialization_vector(Mode mode)
{
return mode != AESNI_ECB;
}
+
+ template <>
+ struct ModeUsesEncryptionKeysOnly<AESNI_ECB> : public std::false_type
+ { };
+
+ template <>
+ struct ModeUsesEncryptionKeysOnly<AESNI_CBC> : public std::false_type
+ { };
+
+ inline bool mode_uses_encryption_keys_only(Mode mode)
+ {
+ return mode != AESNI_ECB && mode != AESNI_CBC;
+ }
}