harmony 鸿蒙明文导入密钥(C/C++)

2025-06-16
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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，请参考密钥导入的支持的算法。

在CMake脚本中链接相关动态库

target_link_libraries(entry PUBLIC libhuks_ndk.z.so)

开发步骤

指定密钥别名keyAlias。密钥别名的最大长度为128字节。
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。
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AES密钥为例 */
#include "huks/native_huks_api.h"
#include "huks/native_huks_param.h"
#include "napi/native_api.h"
#include <cstring>

#define OH_HUKS_AES_KEY_SIZE_32 32

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_testImportKeyParam[] = {{.tag = OH_HUKS_TAG_ALGORITHM, .uint32Param = OH_HUKS_ALG_AES},
                                               {.tag = OH_HUKS_TAG_PURPOSE, .uint32Param = OH_HUKS_KEY_PURPOSE_ENCRYPT},
                                               {.tag = OH_HUKS_TAG_KEY_SIZE, .uint32Param = OH_HUKS_AES_KEY_SIZE_256},
                                               {.tag = OH_HUKS_TAG_DIGEST, .uint32Param = OH_HUKS_DIGEST_NONE}};

static napi_value ImportKey(napi_env env, napi_callback_info info) {
    const char *alias = "test_import";
    struct OH_Huks_Blob aliasBlob = {.size = (uint32_t)strlen(alias), .data = (uint8_t *)alias};
    /* DER格式的密钥，用于后续导入密钥 */
    uint8_t pubKey[OH_HUKS_AES_KEY_SIZE_32] = {0xfb, 0x8b, 0x9f, 0x12, 0xa0, 0x83, 0x19, 0xbe, 0x6a, 0x6f, 0x63,
                                               0x2a, 0x7c, 0x86, 0xba, 0xca, 0x64, 0x0b, 0x88, 0x96, 0xe2, 0xfa,
                                               0x77, 0xbc, 0x71, 0xe3, 0x0f, 0x0f, 0x9e, 0x3c, 0xe5, 0xf9};
    struct OH_Huks_Blob publicKey = {OH_HUKS_AES_KEY_SIZE_32, pubKey};
    struct OH_Huks_ParamSet *testImportKeyParamSet = nullptr;
    struct OH_Huks_Result ohResult;
    do {
        ohResult = InitParamSet(&testImportKeyParamSet, g_testImportKeyParam,
                                sizeof(g_testImportKeyParam) / sizeof(OH_Huks_Param));
        if (ohResult.errorCode != OH_HUKS_SUCCESS) {
            break;
        }
        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;
}