1/* 2 * Copyright (c) 2025 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16// [Start specify_ecc_uncompressed_point_get_keypair] 17import { cryptoFramework } from '@kit.CryptoArchitectureKit'; 18 19async function eccPointCompressedToPoint() { 20 let pkData = 21 new Uint8Array([2, 143, 39, 57, 249, 145, 50, 63, 222, 35, 70, 178, 121, 202, 154, 21, 146, 129, 75, 76, 63, 8, 195, 22 157, 111, 40, 217, 215, 148, 120, 224, 205, 82]); 23 let returnPoint = cryptoFramework.ECCKeyUtil.convertPoint('NID_brainpoolP256r1', pkData); 24 console.info('convertPoint success'); 25 let eccCommonParamsSpec = cryptoFramework.ECCKeyUtil.genECCCommonParamsSpec('NID_brainpoolP256r1'); 26 let eccPubKeySpec: cryptoFramework.ECCPubKeySpec = { 27 algName: 'ECC', 28 specType: cryptoFramework.AsyKeySpecType.PUBLIC_KEY_SPEC, 29 params: eccCommonParamsSpec, 30 pk: returnPoint 31 }; 32 let generatorBySpec = cryptoFramework.createAsyKeyGeneratorBySpec(eccPubKeySpec); 33 let pubKey = await generatorBySpec.generatePubKey(); 34 let returnData = cryptoFramework.ECCKeyUtil.getEncodedPoint('NID_brainpoolP256r1', returnPoint, 'UNCOMPRESSED'); 35 console.info('returnData: ' + 36 returnData); // 4,143,39,57,249,145,50,63,222,35,70,178,121,202,154,21,146,129,75,76,63,8,195,157,111, 37 // 40,217,215,148,120,224,205,82,83,92,185,21,211,184,5,19,114,33,86,85,228,123,242,206,200,98,178,184, 38 // 130,35,232,45,5,202,189,11,46,163,156,152 39 let eccPkX = pubKey.getAsyKeySpec(cryptoFramework.AsyKeySpecItem.ECC_PK_X_BN); 40 console.info('returnPoint x data: ' + 41 returnPoint.x); // 64750044510792891439269945828433327517677381559622384455951527515863444933970 42 console.info('ECC_PK_X_BN：' + 43 eccPkX); // 64750044510792891439269945828433327517677381559622384455951527515863444933970 44} 45// [End specify_ecc_uncompressed_point_get_keypair] 46 47@Entry 48@Component 49struct Index { 50 @State message: string = 'GetKeyObject'; 51 52 build() { 53 Column({ space: 12 }) { 54 Text(this.message).fontSize(20).fontWeight(FontWeight.Bold) 55 Button($r('app.string.call_getKeyObject')) 56 .width('70%') 57 .onClick(async () => { 58 try { 59 await eccPointCompressedToPoint(); 60 this.message = 'GetKeyObject Success'; 61 } catch { 62 this.message = 'GetKeyObject Fail'; 63 } 64 }) 65 } 66 .height('100%') 67 .width('100%') 68 } 69}