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#include "catch.hpp"
#include "mbedtls_wrapper.hpp"
#include <chrono>
#include <thread>
#include <fstream>
#include <sstream>
using namespace duckdb_mbedtls;
using namespace std;
static string file_to_string(string filename) {
std::ifstream stream(filename, ios_base::binary);
duckdb::stringstream buffer;
buffer << stream.rdbuf();
return buffer.str();
}
TEST_CASE("Test that we can verify a signature", "[mbedtls]") {
// those files are created with the create_files.sh script
auto file_content = file_to_string("test/mbedtls/dummy_file");
auto signature = file_to_string("test/mbedtls/dummy_file.signature");
auto pubkey = file_to_string("test/mbedtls/public.pem");
auto hash = MbedTlsWrapper::ComputeSha256Hash(file_content);
REQUIRE(MbedTlsWrapper::IsValidSha256Signature(pubkey, signature, hash));
string empty_string = "";
auto borked_pubkey = pubkey;
borked_pubkey[10]++;
// a borked public key is an exception, this should never happen
REQUIRE_THROWS(MbedTlsWrapper::IsValidSha256Signature(borked_pubkey, signature, hash));
REQUIRE_THROWS(MbedTlsWrapper::IsValidSha256Signature(empty_string, signature, hash));
// wrong-length signatures or hashes should never happen either
REQUIRE_THROWS(MbedTlsWrapper::IsValidSha256Signature(pubkey, empty_string, hash));
REQUIRE_THROWS(MbedTlsWrapper::IsValidSha256Signature(pubkey, signature, empty_string));
// lets flip some bits in the file, it should not validate
auto borked_file = file_content;
borked_file[10]++;
auto hash2 = MbedTlsWrapper::ComputeSha256Hash(borked_file);
REQUIRE(!MbedTlsWrapper::IsValidSha256Signature(pubkey, signature, hash2));
auto borked_signature = signature;
borked_signature[10]++;
REQUIRE(!MbedTlsWrapper::IsValidSha256Signature(pubkey, borked_signature, hash));
auto borked_hash = hash;
borked_hash[10]++;
auto hash3 = MbedTlsWrapper::ComputeSha256Hash(empty_string);
REQUIRE(!MbedTlsWrapper::IsValidSha256Signature(pubkey, signature, hash3));
REQUIRE(!MbedTlsWrapper::IsValidSha256Signature(pubkey, signature, borked_hash));
// seems all right!
REQUIRE(MbedTlsWrapper::IsValidSha256Signature(pubkey, signature, hash));
}
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