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1# 查询密钥别名集(C/C++)
2
3HUKS提供了接口供应用查询密钥别名集。
4
5>**说明：**
6> 轻量级设备不支持查询密钥别名集功能。
7
8## 在CMake脚本中链接相关动态库
9```txt
10target_link_libraries(entry PUBLIC libhuks_ndk.z.so)
11```
12
13## 开发步骤
14
151. 初始化密钥属性集。用于查询指定密钥别名集TAG，TAG仅支持[OH_HUKS_TAG_AUTH_STORAGE_LEVEL](../../reference/apis-universal-keystore-kit/_huks_type_api.md#oh_huks_authstoragelevel)。
16
172. 调用接口[OH_Huks_ListAliases](../../reference/apis-universal-keystore-kit/_huks_key_api.md#oh_huks_listaliases)，查询密钥别名集。
18
19 ```c++
20/* 以下查询密钥别名集为例 */
21#include "huks/native_huks_api.h"
22#include "huks/native_huks_param.h"
23#include "napi/native_api.h"
24#include <string.h>
25OH_Huks_Result InitParamSet(
26    struct OH_Huks_ParamSet **paramSet,
27    const struct OH_Huks_Param *params,
28    uint32_t paramCount)
29{
30    OH_Huks_Result ret = OH_Huks_InitParamSet(paramSet);
31    if (ret.errorCode != OH_HUKS_SUCCESS) {
32        return ret;
33    }
34    ret = OH_Huks_AddParams(*paramSet, params, paramCount);
35    if (ret.errorCode != OH_HUKS_SUCCESS) {
36        OH_Huks_FreeParamSet(paramSet);
37        return ret;
38    }
39    ret = OH_Huks_BuildParamSet(paramSet);
40    if (ret.errorCode != OH_HUKS_SUCCESS) {
41        OH_Huks_FreeParamSet(paramSet);
42        return ret;
43    }
44    return ret;
45}
46struct OH_Huks_Param g_testQueryParam[] = {
47    {
48        .tag = OH_HUKS_TAG_AUTH_STORAGE_LEVEL,
49        .uint32Param = OH_HUKS_AUTH_STORAGE_LEVEL_DE
50    },
51};
52static napi_value ListAliases(napi_env env, napi_callback_info info)
53{
54    struct OH_Huks_ParamSet *testQueryParamSet = nullptr;
55    struct OH_Huks_KeyAliasSet *outData = nullptr;
56    struct OH_Huks_Result ohResult;
57    do {
58        /* 1.初始化密钥属性集 */
59        ohResult = InitParamSet(&testQueryParamSet, g_testQueryParam,
60            sizeof(g_testQueryParam) / sizeof(OH_Huks_Param));
61        if (ohResult.errorCode != OH_HUKS_SUCCESS) {
62            break;
63        }
64        /* 2.查询密钥别名集 */
65        ohResult = OH_Huks_ListAliases(testQueryParamSet, &outData);
66    } while (0);
67
68    OH_Huks_FreeParamSet(&testQueryParamSet);
69    OH_Huks_FreeKeyAliasSet(outData);
70    napi_value ret;
71    napi_create_int32(env, ohResult.errorCode, &ret);
72    return ret;
73}
74```