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/**
* Copyright (c) 2014-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed in accordance with the terms specified in
* the LICENSE file found in the root directory of this source tree.
*/
#include <string>
#include <sqlite3.h>
#include <osquery/utils/base64.h>
#include <osquery/utils/chars.h>
namespace osquery {
enum class B64Type {
B64_ENCODE_CONDITIONAL = 1,
B64_ENCODE = 2,
B64_DECODE = 3,
};
static void b64SqliteValue(sqlite3_context* ctx,
int argc,
sqlite3_value** argv,
B64Type encode) {
if (argc == 0) {
return;
}
if (SQLITE_NULL == sqlite3_value_type(argv[0])) {
sqlite3_result_null(ctx);
return;
}
const auto* value = sqlite3_value_text(argv[0]);
auto size = static_cast<size_t>(sqlite3_value_bytes(argv[0]));
std::string input(reinterpret_cast<const char*>(value), size);
std::string result;
switch (encode) {
case B64Type::B64_ENCODE_CONDITIONAL:
if (isPrintable(input)) {
result = input;
break;
}
case B64Type::B64_ENCODE:
result = base64::encode(input);
break;
case B64Type::B64_DECODE:
result = base64::decode(input);
break;
}
sqlite3_result_text(
ctx, result.c_str(), static_cast<int>(result.size()), SQLITE_TRANSIENT);
}
static void sqliteB64ConditionalEncFunc(sqlite3_context* context,
int argc,
sqlite3_value** argv) {
b64SqliteValue(context, argc, argv, B64Type::B64_ENCODE_CONDITIONAL);
}
static void sqliteB64EncFunc(sqlite3_context* context,
int argc,
sqlite3_value** argv) {
b64SqliteValue(context, argc, argv, B64Type::B64_ENCODE);
}
static void sqliteB64DecFunc(sqlite3_context* context,
int argc,
sqlite3_value** argv) {
b64SqliteValue(context, argc, argv, B64Type::B64_DECODE);
}
void registerEncodingExtensions(sqlite3* db) {
sqlite3_create_function(db,
"conditional_to_base64",
1,
SQLITE_UTF8 | SQLITE_DETERMINISTIC,
nullptr,
sqliteB64ConditionalEncFunc,
nullptr,
nullptr);
sqlite3_create_function(db,
"to_base64",
1,
SQLITE_UTF8 | SQLITE_DETERMINISTIC,
nullptr,
sqliteB64EncFunc,
nullptr,
nullptr);
sqlite3_create_function(db,
"from_base64",
1,
SQLITE_UTF8 | SQLITE_DETERMINISTIC,
nullptr,
sqliteB64DecFunc,
nullptr,
nullptr);
}
} // namespace osquery
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