1# 查询密钥别名集(C/C++)
2
3
4HUKS提供了接口供应用查询密钥别名集。
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
10   target_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 <string.h>
24OH_Huks_Result InitParamSet(
25    struct OH_Huks_ParamSet **paramSet,
26    const struct OH_Huks_Param *params,
27    uint32_t paramCount)
28{
29    OH_Huks_Result ret = OH_Huks_InitParamSet(paramSet);
30    if (ret.errorCode != OH_HUKS_SUCCESS) {
31        return ret;
32    }
33    ret = OH_Huks_AddParams(*paramSet, params, paramCount);
34    if (ret.errorCode != OH_HUKS_SUCCESS) {
35        OH_Huks_FreeParamSet(paramSet);
36        return ret;
37    }
38    ret = OH_Huks_BuildParamSet(paramSet);
39    if (ret.errorCode != OH_HUKS_SUCCESS) {
40        OH_Huks_FreeParamSet(paramSet);
41        return ret;
42    }
43    return ret;
44}
45struct OH_Huks_Param g_testQueryParam[] = {
46    {
47        .tag = OH_HUKS_TAG_AUTH_STORAGE_LEVEL,
48        .uint32Param = OH_HUKS_AUTH_STORAGE_LEVEL_DE
49    },
50};
51static napi_value ListAliases(napi_env env, napi_callback_info info)
52{
53    struct OH_Huks_ParamSet *testQueryParamSet = nullptr;
54    struct OH_Huks_KeyAliasSet *outData = nullptr;
55    struct OH_Huks_Result ohResult;
56    do {
57        /* 1.初始化密钥属性集 */
58        ohResult = InitParamSet(&testQueryParamSet, g_testQueryParam,
59            sizeof(g_testQueryParam) / sizeof(OH_Huks_Param));
60        if (ohResult.errorCode != OH_HUKS_SUCCESS) {
61            break;
62        }
63        /* 2.查询密钥别名集 */
64        ohResult = OH_Huks_ListAliases(testQueryParamSet, &outData);
65    } while (0);
66
67    OH_Huks_FreeParamSet(&testQueryParamSet);
68    OH_Huks_FreeKeyAliasSet(outData);
69    napi_value ret;
70    napi_create_int32(env, ohResult.errorCode, &ret);
71    return ret;
72}
73```