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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/hash.h>
extern "C" {
using namespace Botan_FFI;
BOTAN_FFI_DECLARE_STRUCT(botan_hash_struct, Botan::HashFunction, 0x1F0A4F84);
int botan_hash_init(botan_hash_t* hash, const char* hash_name, uint32_t flags)
{
return ffi_guard_thunk(__func__, [=]() -> int {
if(hash == nullptr || hash_name == nullptr || *hash_name == 0)
return BOTAN_FFI_ERROR_NULL_POINTER;
if(flags != 0)
return BOTAN_FFI_ERROR_BAD_FLAG;
auto h = Botan::HashFunction::create(hash_name);
if(h == nullptr)
return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
*hash = new botan_hash_struct(std::move(h));
return BOTAN_FFI_SUCCESS;
});
}
int botan_hash_destroy(botan_hash_t hash)
{
return BOTAN_FFI_CHECKED_DELETE(hash);
}
int botan_hash_output_length(botan_hash_t hash, size_t* out)
{
if(out == nullptr)
return BOTAN_FFI_ERROR_NULL_POINTER;
return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { *out = h.output_length(); });
}
int botan_hash_block_size(botan_hash_t hash, size_t* out)
{
if(out == nullptr)
return BOTAN_FFI_ERROR_NULL_POINTER;
return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { *out = h.hash_block_size(); });
}
int botan_hash_clear(botan_hash_t hash)
{
return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { h.clear(); });
}
int botan_hash_update(botan_hash_t hash, const uint8_t* buf, size_t len)
{
if(len == 0)
return 0;
if(buf == nullptr)
return BOTAN_FFI_ERROR_NULL_POINTER;
return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { h.update(buf, len); });
}
int botan_hash_final(botan_hash_t hash, uint8_t out[])
{
if(out == nullptr)
return BOTAN_FFI_ERROR_NULL_POINTER;
return BOTAN_FFI_DO(Botan::HashFunction, hash, h, { h.final(out); });
}
int botan_hash_copy_state(botan_hash_t* dest, const botan_hash_t source)
{
return BOTAN_FFI_DO(Botan::HashFunction, source, src, {
*dest = new botan_hash_struct(src.copy_state()); });
}
int botan_hash_name(botan_hash_t hash, char* name, size_t* name_len)
{
if(name_len == nullptr)
return BOTAN_FFI_ERROR_NULL_POINTER;
return BOTAN_FFI_DO(Botan::HashFunction, hash, h, {
return write_str_output(name, name_len, h.name()); });
}
}
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