Botan  2.11.0
Crypto and TLS for C++11
ffi_hotp.cpp
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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_HOTP)
11  #include <botan/hotp.h>
12 #endif
13 
14 extern "C" {
15 
16 using namespace Botan_FFI;
17 
18 #if defined(BOTAN_HAS_HOTP)
19 
20 BOTAN_FFI_DECLARE_STRUCT(botan_hotp_struct, Botan::HOTP, 0x89CBF191);
21 
22 #endif
23 
25  const uint8_t key[], size_t key_len,
26  const char* hash_algo,
27  size_t digits)
28  {
29  if(hotp == nullptr || key == nullptr || hash_algo == nullptr)
31 
32  *hotp = nullptr;
33 
34 #if defined(BOTAN_HAS_HOTP)
35  return ffi_guard_thunk(__func__, [=]() -> int {
36 
37  *hotp = new botan_hotp_struct(
38  new Botan::HOTP(key, key_len, hash_algo, digits));
39 
40  return BOTAN_FFI_SUCCESS;
41  });
42 #else
43  BOTAN_UNUSED(hotp, key, key_len, hash_algo, digits);
45 #endif
46  }
47 
49  {
50 #if defined(BOTAN_HAS_HOTP)
51  return BOTAN_FFI_CHECKED_DELETE(hotp);
52 #else
53  BOTAN_UNUSED(hotp);
55 #endif
56  }
57 
59  uint32_t* hotp_code,
60  uint64_t hotp_counter)
61  {
62 #if defined(BOTAN_HAS_HOTP)
63  if(hotp == nullptr || hotp_code == nullptr)
65 
66  return BOTAN_FFI_DO(Botan::HOTP, hotp, h, {
67  *hotp_code = h.generate_hotp(hotp_counter);
68  });
69 
70 #else
71  BOTAN_UNUSED(hotp, hotp_code, hotp_counter);
73 #endif
74  }
75 
77  uint64_t* next_hotp_counter,
78  uint32_t hotp_code,
79  uint64_t hotp_counter,
80  size_t resync_range)
81  {
82 #if defined(BOTAN_HAS_HOTP)
83  return BOTAN_FFI_DO(Botan::HOTP, hotp, h, {
84 
85  auto resp = h.verify_hotp(hotp_code, hotp_counter, resync_range);
86 
87  if(next_hotp_counter)
88  *next_hotp_counter = resp.second;
89 
90  return (resp.first == true) ? BOTAN_FFI_SUCCESS : BOTAN_FFI_INVALID_VERIFIER;
91  });
92 
93 #else
94  BOTAN_UNUSED(hotp, next_hotp_counter, hotp_code, hotp_counter, resync_range);
96 #endif
97  }
98 
99 }
int ffi_guard_thunk(const char *func_name, std::function< int()> thunk)
Definition: ffi.cpp:86
struct botan_hotp_struct * botan_hotp_t
Definition: ffi.h:1588
int botan_hotp_check(botan_hotp_t hotp, uint64_t *next_hotp_counter, uint32_t hotp_code, uint64_t hotp_counter, size_t resync_range)
Definition: ffi_hotp.cpp:76
int botan_hotp_generate(botan_hotp_t hotp, uint32_t *hotp_code, uint64_t hotp_counter)
Definition: ffi_hotp.cpp:58
int botan_hotp_init(botan_hotp_t *hotp, const uint8_t key[], size_t key_len, const char *hash_algo, size_t digits)
Definition: ffi_hotp.cpp:24
#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:23
int botan_hotp_destroy(botan_hotp_t hotp)
Definition: ffi_hotp.cpp:48
#define BOTAN_FFI_DECLARE_STRUCT(NAME, TYPE, MAGIC)
Definition: ffi_util.h:53
std::pair< bool, uint64_t > verify_hotp(uint32_t otp, uint64_t starting_counter, size_t resync_range=0)
Definition: hotp.cpp:51
#define BOTAN_FFI_DO(T, obj, param, block)
Definition: ffi_util.h:92
uint32_t generate_hotp(uint64_t counter)
Definition: hotp.cpp:41