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/otp.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
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)24 int botan_totp_init(botan_totp_t* totp,
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)
31 return BOTAN_FFI_ERROR_NULL_POINTER;
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);
45 return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
46 #endif
47 }
48
botan_totp_destroy(botan_totp_t totp)49 int botan_totp_destroy(botan_totp_t totp)
50 {
51 #if defined(BOTAN_HAS_TOTP)
52 return BOTAN_FFI_CHECKED_DELETE(totp);
53 #else
54 BOTAN_UNUSED(totp);
55 return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
56 #endif
57 }
58
botan_totp_generate(botan_totp_t totp,uint32_t * totp_code,uint64_t timestamp)59 int botan_totp_generate(botan_totp_t totp,
60 uint32_t* totp_code,
61 uint64_t timestamp)
62 {
63 #if defined(BOTAN_HAS_TOTP)
64 if(totp == nullptr || totp_code == nullptr)
65 return BOTAN_FFI_ERROR_NULL_POINTER;
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);
73 return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
74 #endif
75 }
76
botan_totp_check(botan_totp_t totp,uint32_t totp_code,uint64_t timestamp,size_t acceptable_clock_drift)77 int botan_totp_check(botan_totp_t totp,
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_RETURNING(Botan::TOTP, totp, t, {
84 const bool ok = t.verify_totp(totp_code, timestamp, acceptable_clock_drift);
85 return (ok ? BOTAN_FFI_SUCCESS : BOTAN_FFI_INVALID_VERIFIER);
86 });
87
88 #else
89 BOTAN_UNUSED(totp, totp_code, timestamp, acceptable_clock_drift);
90 return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
91 #endif
92 }
93
94 }
95