ffi_fpe.cpp File Reference

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

Go to the source code of this file.

Functions
int	botan_fpe_decrypt (botan_fpe_t fpe, botan_mp_t x, const uint8_t tweak[], size_t tweak_len)
int	botan_fpe_destroy (botan_fpe_t fpe)
int	botan_fpe_encrypt (botan_fpe_t fpe, botan_mp_t x, const uint8_t tweak[], size_t tweak_len)
int	botan_fpe_fe1_init (botan_fpe_t *fpe, botan_mp_t n, const uint8_t key[], size_t key_len, size_t rounds, uint32_t flags)

Function Documentation

int botan_fpe_decrypt	(	botan_fpe_t	fpe,
		botan_mp_t	x,
		const uint8_t	tweak[],
		size_t	tweak_len
	)

Definition at line 80 of file ffi_fpe.cpp.

References BOTAN_FFI_ERROR_NOT_IMPLEMENTED, BOTAN_FFI_SUCCESS, Botan_FFI::ffi_guard_thunk(), and Botan_FFI::safe_get().

   {
#if defined(BOTAN_HAS_FPE_FE1)
   return ffi_guard_thunk(__func__, [=]() {
      Botan::BigInt r = safe_get(fpe).decrypt(safe_get(x), tweak, tweak_len);
      safe_get(x) = r;
      return BOTAN_FFI_SUCCESS;
      });

#else
   return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
   }

int botan_fpe_destroy

(

botan_fpe_t

fpe

)

Returns

0 if success, error if invalid object handle

Definition at line 58 of file ffi_fpe.cpp.

References BOTAN_FFI_CHECKED_DELETE, and BOTAN_FFI_ERROR_NOT_IMPLEMENTED.

   {
#if defined(BOTAN_HAS_FPE_FE1)
   return BOTAN_FFI_CHECKED_DELETE(fpe);
#else
   return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
   }

int botan_fpe_encrypt	(	botan_fpe_t	fpe,
		botan_mp_t	x,
		const uint8_t	tweak[],
		size_t	tweak_len
	)

Definition at line 67 of file ffi_fpe.cpp.

References BOTAN_FFI_ERROR_NOT_IMPLEMENTED, BOTAN_FFI_SUCCESS, Botan_FFI::ffi_guard_thunk(), and Botan_FFI::safe_get().

   {
#if defined(BOTAN_HAS_FPE_FE1)
   return ffi_guard_thunk(__func__, [=]() {
      Botan::BigInt r = safe_get(fpe).encrypt(safe_get(x), tweak, tweak_len);
      safe_get(x) = r;
      return BOTAN_FFI_SUCCESS;
      });
#else
   return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
   }

int botan_fpe_fe1_init	(	botan_fpe_t *	fpe,
		botan_mp_t	n,
		const uint8_t	key[],
		size_t	key_len,
		size_t	rounds,
		uint32_t	flags
	)

Definition at line 26 of file ffi_fpe.cpp.

References BOTAN_FFI_ERROR_BAD_FLAG, BOTAN_FFI_ERROR_NOT_IMPLEMENTED, BOTAN_FFI_ERROR_NULL_POINTER, BOTAN_FFI_SUCCESS, BOTAN_FPE_FLAG_FE1_COMPAT_MODE, Botan_FFI::ffi_guard_thunk(), and Botan_FFI::safe_get().

   {
#if defined(BOTAN_HAS_FPE_FE1)

   return ffi_guard_thunk(__func__, [=]() {

      if(fpe == nullptr || key == nullptr)
         return BOTAN_FFI_ERROR_NULL_POINTER;

      *fpe = nullptr;

      if(flags != 0 && flags != BOTAN_FPE_FLAG_FE1_COMPAT_MODE)
         return BOTAN_FFI_ERROR_BAD_FLAG;

      const bool compat_mode = (flags & BOTAN_FPE_FLAG_FE1_COMPAT_MODE);

      std::unique_ptr<Botan::FPE_FE1> fpe_obj(
         new Botan::FPE_FE1(safe_get(n), rounds, compat_mode));

      fpe_obj->set_key(key, key_len);

      *fpe = new botan_fpe_struct(fpe_obj.release());
      return BOTAN_FFI_SUCCESS;
      });
#else
   *fpe = nullptr;
   return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
   }