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/*
* (C) 2018 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/ffi.h>
#include <botan/internal/ffi_util.h>
#if defined(BOTAN_HAS_HOTP)
#include <botan/hotp.h>
#endif
extern "C" {
using namespace Botan_FFI;
#if defined(BOTAN_HAS_HOTP)
BOTAN_FFI_DECLARE_STRUCT(botan_hotp_struct, Botan::HOTP, 0x89CBF191);
#endif
int botan_hotp_init(botan_hotp_t* hotp,
const uint8_t key[], size_t key_len,
const char* hash_algo,
size_t digits)
{
if(hotp == nullptr || key == nullptr || hash_algo == nullptr)
return BOTAN_FFI_ERROR_NULL_POINTER;
*hotp = nullptr;
#if defined(BOTAN_HAS_HOTP)
return ffi_guard_thunk(__func__, [=]() -> int {
*hotp = new botan_hotp_struct(
new Botan::HOTP(key, key_len, hash_algo, digits));
return BOTAN_FFI_SUCCESS;
});
#else
BOTAN_UNUSED(hotp, key, key_len, hash_algo, digits);
return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
}
int botan_hotp_destroy(botan_hotp_t hotp)
{
#if defined(BOTAN_HAS_HOTP)
return BOTAN_FFI_CHECKED_DELETE(hotp);
#else
BOTAN_UNUSED(hotp);
return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
}
int botan_hotp_generate(botan_hotp_t hotp,
uint32_t* hotp_code,
uint64_t hotp_counter)
{
#if defined(BOTAN_HAS_HOTP)
if(hotp == nullptr || hotp_code == nullptr)
return BOTAN_FFI_ERROR_NULL_POINTER;
return BOTAN_FFI_DO(Botan::HOTP, hotp, h, {
*hotp_code = h.generate_hotp(hotp_counter);
});
#else
BOTAN_UNUSED(hotp, hotp_code, hotp_counter);
return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
}
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)
{
#if defined(BOTAN_HAS_HOTP)
return BOTAN_FFI_DO(Botan::HOTP, hotp, h, {
auto resp = h.verify_hotp(hotp_code, hotp_counter, resync_range);
if(next_hotp_counter)
*next_hotp_counter = resp.second;
return (resp.first == true) ? BOTAN_FFI_SUCCESS : BOTAN_FFI_INVALID_VERIFIER;
});
#else
BOTAN_UNUSED(hotp, next_hotp_counter, hotp_code, hotp_counter, resync_range);
return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
}
}
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