Botan 2.19.3
Crypto and TLS for C&
Functions
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

◆ botan_fpe_decrypt()

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.

81 {
82#if defined(BOTAN_HAS_FPE_FE1)
83 return ffi_guard_thunk(__func__, [=]() {
84 Botan::BigInt r = safe_get(fpe).decrypt(safe_get(x), tweak, tweak_len);
85 safe_get(x) = r;
86 return BOTAN_FFI_SUCCESS;
87 });
88
89#else
91#endif
92 }
@ BOTAN_FFI_ERROR_NOT_IMPLEMENTED
Definition ffi.h:83
@ BOTAN_FFI_SUCCESS
Definition ffi.h:63
int ffi_guard_thunk(const char *func_name, std::function< int()> thunk)
Definition ffi.cpp:89
T & safe_get(botan_struct< T, M > *p)
Definition ffi_util.h:61

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

◆ botan_fpe_destroy()

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.

59 {
60#if defined(BOTAN_HAS_FPE_FE1)
61 return BOTAN_FFI_CHECKED_DELETE(fpe);
62#else
64#endif
65 }
#define BOTAN_FFI_CHECKED_DELETE(o)
Definition ffi_util.h:129

References BOTAN_FFI_CHECKED_DELETE, and BOTAN_FFI_ERROR_NOT_IMPLEMENTED.

◆ botan_fpe_encrypt()

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.

68 {
69#if defined(BOTAN_HAS_FPE_FE1)
70 return ffi_guard_thunk(__func__, [=]() {
71 Botan::BigInt r = safe_get(fpe).encrypt(safe_get(x), tweak, tweak_len);
72 safe_get(x) = r;
73 return BOTAN_FFI_SUCCESS;
74 });
75#else
77#endif
78 }

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

◆ botan_fpe_fe1_init()

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.

29 {
30#if defined(BOTAN_HAS_FPE_FE1)
31
32 return ffi_guard_thunk(__func__, [=]() {
33
34 if(fpe == nullptr || key == nullptr)
36
37 *fpe = nullptr;
38
39 if(flags != 0 && flags != BOTAN_FPE_FLAG_FE1_COMPAT_MODE)
41
42 const bool compat_mode = (flags & BOTAN_FPE_FLAG_FE1_COMPAT_MODE);
43
44 std::unique_ptr<Botan::FPE_FE1> fpe_obj(
45 new Botan::FPE_FE1(safe_get(n), rounds, compat_mode));
46
47 fpe_obj->set_key(key, key_len);
48
49 *fpe = new botan_fpe_struct(fpe_obj.release());
50 return BOTAN_FFI_SUCCESS;
51 });
52#else
53 *fpe = nullptr;
55#endif
56 }
#define BOTAN_FPE_FLAG_FE1_COMPAT_MODE
Definition ffi.h:1755
@ BOTAN_FFI_ERROR_BAD_FLAG
Definition ffi.h:76
@ BOTAN_FFI_ERROR_NULL_POINTER
Definition ffi.h:77
Flags flags(Flag flags)
Definition p11.h:860

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().