ffi_keywrap.cpp File Reference

#include <botan/ffi.h>
#include <botan/internal/ffi_util.h>

Go to the source code of this file.

Functions
int	botan_key_unwrap3394 (const uint8_t wrapped_key[], size_t wrapped_key_len, const uint8_t kek[], size_t kek_len, uint8_t key[], size_t *key_len)
int	botan_key_wrap3394 (const uint8_t key[], size_t key_len, const uint8_t kek[], size_t kek_len, uint8_t wrapped_key[], size_t *wrapped_key_len)
int	botan_nist_kw_dec (const char *cipher_algo, int padded, const uint8_t wrapped_key[], size_t wrapped_key_len, const uint8_t kek[], size_t kek_len, uint8_t key[], size_t *key_len)
int	botan_nist_kw_enc (const char *cipher_algo, int padded, const uint8_t key[], size_t key_len, const uint8_t kek[], size_t kek_len, uint8_t wrapped_key[], size_t *wrapped_key_len)

Function Documentation

botan_key_unwrap3394()

int botan_key_unwrap3394	(	const uint8_t	wrapped_key[],
		size_t	wrapped_key_len,
		const uint8_t	kek[],
		size_t	kek_len,
		uint8_t	key[],
		size_t *	key_len
	)

Definition at line 87 of file ffi_keywrap.cpp.

   {
   std::string cipher_name = "AES-" + std::to_string(8*kek_len);
 
   return botan_nist_kw_dec(cipher_name.c_str(), 0,
                            wrapped_key, wrapped_key_len,
                            kek, kek_len,
                            key, key_len);
   }

References botan_nist_kw_dec().

botan_key_wrap3394()

int botan_key_wrap3394	(	const uint8_t	key[],
		size_t	key_len,
		const uint8_t	kek[],
		size_t	kek_len,
		uint8_t	wrapped_key[],
		size_t *	wrapped_key_len
	)

Key wrapping as per RFC 3394

Definition at line 75 of file ffi_keywrap.cpp.

   {
   std::string cipher_name = "AES-" + std::to_string(8*kek_len);
 
   return botan_nist_kw_enc(cipher_name.c_str(), 0,
                            key, key_len,
                            kek, kek_len,
                            wrapped_key, wrapped_key_len);
   }

References botan_nist_kw_enc().

botan_nist_kw_dec()

int botan_nist_kw_dec	(	const char *	cipher_algo,
		int	padded,
		const uint8_t	wrapped_key[],
		size_t	wrapped_key_len,
		const uint8_t	kek[],
		size_t	kek_len,
		uint8_t	key[],
		size_t *	key_len
	)

Definition at line 47 of file ffi_keywrap.cpp.

   {
#if defined(BOTAN_HAS_NIST_KEYWRAP)
   return ffi_guard_thunk(__func__, [=]() -> int {
      if(padded != 0 && padded != 1)
         return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
 
      auto bc = Botan::BlockCipher::create_or_throw(cipher_algo);
      bc->set_key(kek, kek_len);
 
      Botan::secure_vector<uint8_t> output;
 
      if(padded == 0)
         output = Botan::nist_key_unwrap(wrapped_key, wrapped_key_len, *bc);
      else
         output = Botan::nist_key_unwrap_padded(wrapped_key, wrapped_key_len, *bc);
 
      return write_vec_output(key, key_len, output);
      });
#else
   BOTAN_UNUSED(cipher_algo, padded, key, key_len, kek, kek_len, wrapped_key, wrapped_key_len);
   return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
   }

References BOTAN_FFI_ERROR_NOT_IMPLEMENTED, BOTAN_UNUSED, Botan::BlockCipher::create_or_throw(), Botan_FFI::ffi_guard_thunk(), Botan::nist_key_unwrap(), Botan::nist_key_unwrap_padded(), and Botan_FFI::write_vec_output().

Referenced by botan_key_unwrap3394().

botan_nist_kw_enc()

int botan_nist_kw_enc	(	const char *	cipher_algo,
		int	padded,
		const uint8_t	key[],
		size_t	key_len,
		const uint8_t	kek[],
		size_t	kek_len,
		uint8_t	wrapped_key[],
		size_t *	wrapped_key_len
	)

Definition at line 20 of file ffi_keywrap.cpp.

   {
#if defined(BOTAN_HAS_NIST_KEYWRAP)
   return ffi_guard_thunk(__func__, [=]() -> int {
      if(padded != 0 && padded != 1)
         return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
      auto bc = Botan::BlockCipher::create_or_throw(cipher_algo);
      bc->set_key(kek, kek_len);
 
      std::vector<uint8_t> output;
 
      if(padded == 0)
         output = Botan::nist_key_wrap(key, key_len, *bc);
      else
         output = Botan::nist_key_wrap_padded(key, key_len, *bc);
 
      return write_vec_output(wrapped_key, wrapped_key_len, output);
      });
#else
   BOTAN_UNUSED(cipher_algo, padded, key, key_len, kek, kek_len, wrapped_key, wrapped_key_len);
   return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
   }

References BOTAN_FFI_ERROR_NOT_IMPLEMENTED, BOTAN_UNUSED, Botan::BlockCipher::create_or_throw(), Botan_FFI::ffi_guard_thunk(), Botan::nist_key_wrap(), Botan::nist_key_wrap_padded(), and Botan_FFI::write_vec_output().

Referenced by botan_key_wrap3394().