Botan  2.12.1
Crypto and TLS for C++11
ffi_totp.cpp
Go to the documentation of this file.
1 /*
2 * (C) 2018 Jack Lloyd
3 *
4 * Botan is released under the Simplified BSD License (see license.txt)
5 */
6 
7 #include <botan/ffi.h>
8 #include <botan/internal/ffi_util.h>
9 
10 #if defined(BOTAN_HAS_TOTP)
11  #include <botan/totp.h>
12 #endif
13 
14 extern "C" {
15 
16 using namespace Botan_FFI;
17 
18 #if defined(BOTAN_HAS_TOTP)
19 
20 BOTAN_FFI_DECLARE_STRUCT(botan_totp_struct, Botan::TOTP, 0x3D9D2CD1);
21 
22 #endif
23 
25  const uint8_t key[], size_t key_len,
26  const char* hash_algo,
27  size_t digits,
28  size_t time_step)
29  {
30  if(totp == nullptr || key == nullptr || hash_algo == nullptr)
32 
33  *totp = nullptr;
34 
35 #if defined(BOTAN_HAS_TOTP)
36  return ffi_guard_thunk(__func__, [=]() -> int {
37 
38  *totp = new botan_totp_struct(
39  new Botan::TOTP(key, key_len, hash_algo, digits, time_step));
40 
41  return BOTAN_FFI_SUCCESS;
42  });
43 #else
44  BOTAN_UNUSED(totp, key, key_len, hash_algo, digits, time_step);
46 #endif
47  }
48 
50  {
51 #if defined(BOTAN_HAS_TOTP)
52  return BOTAN_FFI_CHECKED_DELETE(totp);
53 #else
54  BOTAN_UNUSED(totp);
56 #endif
57  }
58 
60  uint32_t* totp_code,
61  uint64_t timestamp)
62  {
63 #if defined(BOTAN_HAS_TOTP)
64  if(totp == nullptr || totp_code == nullptr)
66 
67  return BOTAN_FFI_DO(Botan::TOTP, totp, t, {
68  *totp_code = t.generate_totp(timestamp);
69  });
70 
71 #else
72  BOTAN_UNUSED(totp, totp_code, timestamp);
74 #endif
75  }
76 
78  uint32_t totp_code,
79  uint64_t timestamp,
80  size_t acceptable_clock_drift)
81  {
82 #if defined(BOTAN_HAS_TOTP)
83  return BOTAN_FFI_DO(Botan::TOTP, totp, t, {
84  const bool ok = t.verify_totp(totp_code, timestamp, acceptable_clock_drift);
86  });
87 
88 #else
89  BOTAN_UNUSED(totp, totp_code, timestamp, acceptable_clock_drift);
91 #endif
92  }
93 
94 }
int ffi_guard_thunk(const char *func_name, std::function< int()> thunk)
Definition: ffi.cpp:86
int botan_totp_generate(botan_totp_t totp, uint32_t *totp_code, uint64_t timestamp)
Definition: ffi_totp.cpp:59
bool verify_totp(uint32_t otp, std::chrono::system_clock::time_point time, size_t clock_drift_accepted=0)
Definition: totp.cpp:39
int botan_totp_destroy(botan_totp_t totp)
Definition: ffi_totp.cpp:49
int botan_totp_check(botan_totp_t totp, uint32_t totp_code, uint64_t timestamp, size_t acceptable_clock_drift)
Definition: ffi_totp.cpp:77
#define BOTAN_FFI_CHECKED_DELETE(o)
Definition: ffi_util.h:120
#define BOTAN_UNUSED(...)
Definition: assert.h:142
AlgorithmIdentifier hash_algo
Definition: x509_obj.cpp:22
uint32_t generate_totp(std::chrono::system_clock::time_point time_point)
Definition: totp.cpp:27
#define BOTAN_FFI_DECLARE_STRUCT(NAME, TYPE, MAGIC)
Definition: ffi_util.h:53
struct botan_totp_struct * botan_totp_t
Definition: ffi.h:1650
#define BOTAN_FFI_DO(T, obj, param, block)
Definition: ffi_util.h:92
int botan_totp_init(botan_totp_t *totp, const uint8_t key[], size_t key_len, const char *hash_algo, size_t digits, size_t time_step)
Definition: ffi_totp.cpp:24