1# 证书链校验时从p12文件构造TrustAnchor对象数组
2
3证书链校验时从p12文件构造TrustAnchor对象数组。
4
5## 开发步骤
6
71. 导入[证书算法库框架模块](../../reference/apis-device-certificate-kit/js-apis-cert.md)。
8
92. 基于现有的p12文件数据，调用[cert.createTrustAnchorsWithKeyStore](../../reference/apis-device-certificate-kit/js-apis-cert.md#certcreatetrustanchorswithkeystore12)创建TrustAnchor数组对象，并返回结果。
10
11  ```ts
12  import { cert } from '@kit.DeviceCertificateKit';
13  import { BusinessError } from '@kit.BasicServicesKit';
14  import { util } from '@kit.ArkTS';
15
16  let p12Data = new Uint8Array([0x30, 0x82, 0x07, 0x5C, 0x02, 0x01, 0x03, 0x30, 0x82, 0x07, 0x12, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x07, 0x01, 0xA0, 0x82, 0x07, 0x03, 0x04, 0x82, 0x06, 0xFF, 0x30, 0x82, 0x06, 0xFB, 0x30, 0x82, 0x05, 0xB2, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x07, 0x06, 0xA0, 0x82, 0x05, 0xA3, 0x30, 0x82, 0x05, 0x9F, 0x02, 0x01, 0x00, 0x30, 0x82, 0x05, 0x98, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x07, 0x01, 0x30, 0x57, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x05, 0x0D, 0x30, 0x4A, 0x30, 0x29, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x05, 0x0C, 0x30, 0x1C, 0x04, 0x08, 0xA9, 0x1C, 0x1B, 0x19, 0x36, 0xDE, 0xD4, 0x20, 0x02, 0x02, 0x08, 0x00, 0x30, 0x0C, 0x06, 0x08, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x02, 0x09, 0x05, 0x00, 0x30, 0x1D, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x01, 0x2A, 0x04, 0x10, 0x7D, 0xE5, 0x23, 0x96, 0x18, 0x8B, 0xF4, 0xBC, 0x9F, 0x4E, 0xE8, 0xE9, 0xAA, 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17  try {
18    cert.createTrustAnchorsWithKeyStore(p12Data, '123456').then((data) => {
19      console.log('createTrustAnchorsWithKeyStore sucess, the num of result is :' + JSON.stringify(data.length))
20    }).catch((err: BusinessError) => {
21      console.error('createTrustAnchorsWithKeyStore failed, error :' + JSON.stringify(err))
22    })
23  } catch(error) {
24    console.error('createTrustAnchorsWithKeyStore failed, error :' + JSON.stringify(error))
25  }
26  ```
27