鸿蒙开发：Universal Keystore Kit（密钥管理服务）【明文导入密钥(C/C++)】

明文导入密钥(C/C++)

以明文导入ECC密钥为例。具体的场景介绍及支持的算法规格

在CMake脚本中链接相关动态库

   target_link_libraries(entry PUBLIC libhuks_ndk.z.so)
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开发步骤

1. 指定密钥别名keyAlias。 密钥别名的最大长度为64字节。

2. 封装密钥属性集和密钥材料。通过[OH_Huks_InitParamSet]、[OH_Huks_AddParams]、[OH_Huks_BuildParamSet]构造密钥属性集paramSet。

   • 密钥属性集中必须包含[OH_Huks_KeyAlg]、[OH_Huks_KeySize]、[OH_Huks_KeyPurpose]属性。
   • 密钥材料须符合[HUKS密钥材料格式]。
   • 开发前请熟悉鸿蒙开发指导文档：gitee.com/li-shizhen-skin/harmony-os/blob/master/README.md点击或者复制转到。

3. 调用[OH_Huks_ImportKeyItem]，传入密钥别名和密钥属性集，导入密钥。

/* 以下以明文导入ECC密钥为例 */
#include "huks/native_huks_api.h"
#include "huks/native_huks_param.h"
#include <string.h>
OH_Huks_Result InitParamSet(struct OH_Huks_ParamSet **paramSet, const struct OH_Huks_Param *params,
                            uint32_t paramCount) {
    OH_Huks_Result ret = OH_Huks_InitParamSet(paramSet);
    if (ret.errorCode != OH_HUKS_SUCCESS) {
        return ret;
    }
    ret = OH_Huks_AddParams(*paramSet, params, paramCount);
    if (ret.errorCode != OH_HUKS_SUCCESS) {
        OH_Huks_FreeParamSet(paramSet);
        return ret;
    }
    ret = OH_Huks_BuildParamSet(paramSet);
    if (ret.errorCode != OH_HUKS_SUCCESS) {
        OH_Huks_FreeParamSet(paramSet);
        return ret;
    }
    return ret;
}
struct OH_Huks_Param g_testGenerateKeyParam[] = {{.tag = OH_HUKS_TAG_ALGORITHM, .uint32Param = OH_HUKS_ALG_ECC},
                                                 {.tag = OH_HUKS_TAG_PURPOSE, .uint32Param = OH_HUKS_KEY_PURPOSE_AGREE},
                                                 {.tag = OH_HUKS_TAG_KEY_SIZE, .uint32Param = OH_HUKS_ECC_KEY_SIZE_256},
                                                 {.tag = OH_HUKS_TAG_DIGEST, .uint32Param = OH_HUKS_DIGEST_NONE}};
static napi_value GenerateKey(napi_env env, napi_callback_info info) {
    const char *alias = "test_generate";
    struct OH_Huks_Blob aliasBlob = {.size = (uint32_t)strlen(alias), .data = (uint8_t *)alias};
    struct OH_Huks_ParamSet *testGenerateKeyParamSet = nullptr;
    struct OH_Huks_Result ohResult;
    do {
        ohResult = InitParamSet(&testGenerateKeyParamSet, g_testGenerateKeyParam,
                                sizeof(g_testGenerateKeyParam) / sizeof(OH_Huks_Param));
        if (ohResult.errorCode != OH_HUKS_SUCCESS) {
            break;
        }
        ohResult = OH_Huks_GenerateKeyItem(&aliasBlob, testGenerateKeyParamSet, nullptr);
    } while (0);
    OH_Huks_FreeParamSet(&testGenerateKeyParamSet);
    napi_value ret;
    napi_create_int32(env, ohResult.errorCode, &ret);
    return ret;
}
static napi_value ImportKey(napi_env env, napi_callback_info info) {
    (void)GenerateKey(env, info);
    const char *alias = "test_generate";
    struct OH_Huks_Blob aliasBlob = {.size = (uint32_t)strlen(alias), .data = (uint8_t *)alias};
    uint8_t pubKey[OH_HUKS_ECC_KEY_SIZE_256] = {0};
    struct OH_Huks_Blob publicKey = {OH_HUKS_ECC_KEY_SIZE_256, pubKey};
    struct OH_Huks_ParamSet *testImportKeyParamSet = nullptr;
    struct OH_Huks_Result ohResult;
    do {
        ohResult = InitParamSet(&testImportKeyParamSet, g_testGenerateKeyParam,
                                sizeof(g_testGenerateKeyParam) / sizeof(OH_Huks_Param));
        if (ohResult.errorCode != OH_HUKS_SUCCESS) {
            break;
        }
        ohResult = OH_Huks_ExportPublicKeyItem(&aliasBlob, testImportKeyParamSet, &publicKey);
        if (ohResult.errorCode != OH_HUKS_SUCCESS) {
            break;
        }
        /* 4. Import Key */
        char newKey[] = "test_import";
        struct OH_Huks_Blob newKeyAlias = {.size = (uint32_t)strlen(newKey), .data = (uint8_t *)newKey};
        ohResult = OH_Huks_ImportKeyItem(&newKeyAlias, testImportKeyParamSet, &publicKey);
    } while (0);
    OH_Huks_FreeParamSet(&testImportKeyParamSet);
    napi_value ret;
    napi_create_int32(env, ohResult.errorCode, &ret);
    return ret;
}
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