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/*
* (C) 2015,2017 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/ffi.h>
#include <botan/internal/ffi_util.h>
#include <botan/internal/ffi_rng.h>
#include <botan/pbkdf.h>
#include <botan/pwdhash.h>
#include <botan/kdf.h>
#if defined(BOTAN_HAS_BCRYPT)
#include <botan/bcrypt.h>
#endif
extern "C" {
using namespace Botan_FFI;
int botan_pbkdf(const char* algo, uint8_t out[], size_t out_len,
const char* pass, const uint8_t salt[], size_t salt_len,
size_t iterations)
{
return botan_pwdhash(algo,
iterations,
0,
0,
out, out_len,
pass, 0,
salt, salt_len);
}
int botan_pbkdf_timed(const char* algo,
uint8_t out[], size_t out_len,
const char* password,
const uint8_t salt[], size_t salt_len,
size_t ms_to_run,
size_t* iterations_used)
{
return botan_pwdhash_timed(algo,
static_cast<uint32_t>(ms_to_run),
iterations_used,
nullptr,
nullptr,
out, out_len,
password, 0,
salt, salt_len);
}
int botan_pwdhash(
const char* algo,
size_t param1,
size_t param2,
size_t param3,
uint8_t out[],
size_t out_len,
const char* password,
size_t password_len,
const uint8_t salt[],
size_t salt_len)
{
if(algo == nullptr || password == nullptr)
return BOTAN_FFI_ERROR_NULL_POINTER;
if(password_len == 0)
password_len = std::strlen(password);
return ffi_guard_thunk(__func__, [=]() -> int {
auto pwdhash_fam = Botan::PasswordHashFamily::create(algo);
if(!pwdhash_fam)
return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
auto pwdhash = pwdhash_fam->from_params(param1, param2, param3);
pwdhash->derive_key(out, out_len,
password, password_len,
salt, salt_len);
return BOTAN_FFI_SUCCESS;
});
}
int botan_pwdhash_timed(
const char* algo,
uint32_t msec,
size_t* param1,
size_t* param2,
size_t* param3,
uint8_t out[],
size_t out_len,
const char* password,
size_t password_len,
const uint8_t salt[],
size_t salt_len)
{
if(algo == nullptr || password == nullptr)
return BOTAN_FFI_ERROR_NULL_POINTER;
if(password_len == 0)
password_len = std::strlen(password);
return ffi_guard_thunk(__func__, [=]() -> int {
auto pwdhash_fam = Botan::PasswordHashFamily::create(algo);
if(!pwdhash_fam)
return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
auto pwdhash = pwdhash_fam->tune(out_len, std::chrono::milliseconds(msec));
if(param1)
*param1 = pwdhash->iterations();
if(param2)
*param2 = pwdhash->parallelism();
if(param3)
*param3 = pwdhash->memory_param();
pwdhash->derive_key(out, out_len,
password, password_len,
salt, salt_len);
return BOTAN_FFI_SUCCESS;
});
}
int botan_kdf(const char* kdf_algo,
uint8_t out[], size_t out_len,
const uint8_t secret[], size_t secret_len,
const uint8_t salt[], size_t salt_len,
const uint8_t label[], size_t label_len)
{
return ffi_guard_thunk(__func__, [=]() -> int {
std::unique_ptr<Botan::KDF> kdf(Botan::get_kdf(kdf_algo));
kdf->kdf(out, out_len, secret, secret_len, salt, salt_len, label, label_len);
return BOTAN_FFI_SUCCESS;
});
}
int botan_scrypt(uint8_t out[], size_t out_len,
const char* password,
const uint8_t salt[], size_t salt_len,
size_t N, size_t r, size_t p)
{
return botan_pwdhash("Scrypt", N, r, p,
out, out_len,
password, 0,
salt, salt_len);
}
int botan_bcrypt_generate(uint8_t* out, size_t* out_len,
const char* pass,
botan_rng_t rng_obj, size_t wf,
uint32_t flags)
{
#if defined(BOTAN_HAS_BCRYPT)
return ffi_guard_thunk(__func__, [=]() -> int {
if(out == nullptr || out_len == nullptr || pass == nullptr)
return BOTAN_FFI_ERROR_NULL_POINTER;
if(flags != 0)
return BOTAN_FFI_ERROR_BAD_FLAG;
if(wf < 4 || wf > 18)
return BOTAN_FFI_ERROR_BAD_PARAMETER;
Botan::RandomNumberGenerator& rng = safe_get(rng_obj);
const std::string bcrypt = Botan::generate_bcrypt(pass, rng, static_cast<uint16_t>(wf));
return write_str_output(out, out_len, bcrypt);
});
#else
return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
}
int botan_bcrypt_is_valid(const char* pass, const char* hash)
{
#if defined(BOTAN_HAS_BCRYPT)
return ffi_guard_thunk(__func__, [=]() -> int {
return Botan::check_bcrypt(pass, hash) ? BOTAN_FFI_SUCCESS : BOTAN_FFI_INVALID_VERIFIER;
});
#else
return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
}
}
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