crypt_shared-stub.cpp

/**
 * This file does not contain test cases.
 *
 * This file defines the minimum APIs for crypt_shared to be successfully loaded
 * (but not necessarily fully used) by libmongocrypt. This is only used to test
 * the loading and un-loading of the crypt_shared dynamic library file by
 * libmongocrypt.
 */

#define MONGO_CRYPT_SUPPORT_COMPILING

#include <mongo_crypt-v1.h>

#include <bson/bson.h>

#include <cinttypes>
#include <cstring>

struct mongo_crypt_v1_status {};

typedef mongo_crypt_v1_status status_t;

status_t *mongo_crypt_v1_status_create(void) {
    return new status_t;
}

void mongo_crypt_v1_status_destroy(status_t *st) {
    delete st;
}

int mongo_crypt_v1_status_get_error(const status_t *) {
    return 0;
}

const char *mongo_crypt_v1_status_get_explanation(const status_t *) {
    return "nothing here";
}

int mongo_crypt_v1_status_get_code(const status_t *) {
    return 0;
}

struct mongo_crypt_v1_lib {};

typedef mongo_crypt_v1_lib lib_t;

lib_t *mongo_crypt_v1_lib_create(status_t *) {
    return new lib_t;
}

int mongo_crypt_v1_lib_destroy(lib_t *lib, status_t *) {
    delete lib;
    return MONGO_CRYPT_V1_SUCCESS;
}

uint64_t mongo_crypt_v1_get_version(void) {
#ifdef UINT64_C
    return UINT64_C(0x000600020001000);
#else
    return 0x000600020001000;
#endif
}

const char *mongo_crypt_v1_get_version_str(void) {
    return "stubbed-crypt_shared";
}

struct mongo_crypt_v1_query_analyzer {};

typedef mongo_crypt_v1_query_analyzer query_analyzer_t;

query_analyzer_t *mongo_crypt_v1_query_analyzer_create(lib_t *, status_t *) {
    return new query_analyzer_t;
}

void mongo_crypt_v1_query_analyzer_destroy(query_analyzer_t *qa) {
    delete qa;
}

uint8_t *mongo_crypt_v1_analyze_query(query_analyzer_t *qa,
                                      const uint8_t *doc_bson,
                                      const char *ns_str,
                                      uint32_t ns_len,
                                      uint32_t *bson_len_out,
                                      status_t *) {
    std::uint32_t doc_len;
    std::copy_n(doc_bson, sizeof doc_len, reinterpret_cast<char *>(&doc_len));
    doc_len = BSON_UINT32_FROM_LE(doc_len);
    bson_t *given = bson_new_from_data(doc_bson, doc_len);
    bson_t doc = BSON_INITIALIZER;
    BSON_APPEND_DOCUMENT(&doc, "originalCommand", given);
    bson_t tmp_doc;
    bson_init_from_json( //
        &tmp_doc,
        R"({
         "markedDocument": true
      })",
        -1,
        NULL);
    BSON_APPEND_DOCUMENT(&doc, "result", &tmp_doc);
    uint8_t *buf = new uint8_t[doc.len];
    std::copy_n(bson_get_data(&doc), doc.len, buf);
    *bson_len_out = doc.len;
    bson_destroy(given);
    bson_destroy(&tmp_doc);
    return buf;
}

void mongo_crypt_v1_bson_free(uint8_t *bson) {
    delete[] bson;
}