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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/mac.h>
extern "C" {
using namespace Botan_FFI;
BOTAN_FFI_DECLARE_STRUCT(botan_mac_struct, Botan::MessageAuthenticationCode, 0xA06E8FC1);
int botan_mac_init(botan_mac_t* mac, const char* mac_name, uint32_t flags)
{
return ffi_guard_thunk(__func__, [=]() -> int {
if(!mac || !mac_name || flags != 0)
return BOTAN_FFI_ERROR_NULL_POINTER;
std::unique_ptr<Botan::MessageAuthenticationCode> m =
Botan::MessageAuthenticationCode::create(mac_name);
if(m == nullptr)
return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
*mac = new botan_mac_struct(m.release());
return BOTAN_FFI_SUCCESS;
});
}
int botan_mac_destroy(botan_mac_t mac)
{
return BOTAN_FFI_CHECKED_DELETE(mac);
}
int botan_mac_set_key(botan_mac_t mac, const uint8_t* key, size_t key_len)
{
return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { m.set_key(key, key_len); });
}
int botan_mac_output_length(botan_mac_t mac, size_t* out)
{
return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { *out = m.output_length(); });
}
int botan_mac_clear(botan_mac_t mac)
{
return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { m.clear(); });
}
int botan_mac_update(botan_mac_t mac, const uint8_t* buf, size_t len)
{
return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { m.update(buf, len); });
}
int botan_mac_final(botan_mac_t mac, uint8_t out[])
{
return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, { m.final(out); });
}
int botan_mac_name(botan_mac_t mac, char* name, size_t* name_len)
{
return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, {
return write_str_output(name, name_len, m.name()); });
}
int botan_mac_get_keyspec(botan_mac_t mac,
size_t* out_minimum_keylength,
size_t* out_maximum_keylength,
size_t* out_keylength_modulo)
{
return BOTAN_FFI_DO(Botan::MessageAuthenticationCode, mac, m, {
if(out_minimum_keylength)
*out_minimum_keylength = m.minimum_keylength();
if(out_maximum_keylength)
*out_maximum_keylength = m.maximum_keylength();
if(out_keylength_modulo)
*out_keylength_modulo = m.key_spec().keylength_multiple();
});
}
}
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