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/*
* (C) 2023 Least Authority TFA GmbH
*
* 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_ZFEC)
#include <botan/zfec.h>
#endif
extern "C" {
int botan_zfec_encode(size_t K, size_t N, const uint8_t* input, size_t size, uint8_t** outputs) {
#if defined(BOTAN_HAS_ZFEC)
return Botan_FFI::ffi_guard_thunk(__func__, [=]() -> int {
Botan::ZFEC(K, N).encode(input, size, [=](size_t index, const uint8_t block[], size_t blockSize) -> void {
std::copy(block, block + blockSize, outputs[index]);
});
return BOTAN_FFI_SUCCESS;
});
#else
BOTAN_UNUSED(K, N, input, size, outputs);
return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
}
int botan_zfec_decode(
size_t K, size_t N, const size_t* indexes, uint8_t* const* const inputs, size_t shareSize, uint8_t** outputs) {
#if defined(BOTAN_HAS_ZFEC)
return Botan_FFI::ffi_guard_thunk(__func__, [=]() -> int {
std::map<size_t, const uint8_t*> shares;
for(size_t k = 0; k < K; ++k) {
shares.insert(std::pair<size_t, const uint8_t*>(indexes[k], inputs[k]));
}
Botan::ZFEC(K, N).decode_shares(
shares, shareSize, [=](size_t index, const uint8_t block[], size_t blockSize) -> void {
std::copy(block, block + blockSize, outputs[index]);
});
return BOTAN_FFI_SUCCESS;
});
#else
BOTAN_UNUSED(K, N, indexes, inputs, shareSize, outputs);
return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
}
}