harmony 鸿蒙@ohos.secureElement (安全单元的通道管理)

  • 2023-06-24
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@ohos.secureElement (安全单元的通道管理)

本模块主要用于操作及管理安全单元（SecureElement，简称SE）。文档中出现的SE服务为SEService实例，参见newSEService。

对于文档中出现以下类型说明：

类型 说明
Session 此类的实例表示与设备上可用的某个SE的连接会话。
Reader 此类的实例表示该设备支持的SE Reader。
Channel 此类的实例表示向SE打开的ISO/IEC 7816-4通道。

说明：

本模块首批接口从API version 10开始支持。后续版本的新增接口，采用上角标单独标记接口的起始版本。

导入模块

import secureElement from '@ohos.secureElement';

secureElement.ServiceState

定义不同的SE 服务状态值。

系统能力： SystemCapability.Communication.SecureElement

名称 值 说明
DISCONNECTED 0 SE服务状态已断开。
CONNECTED 1 SE服务状态已连接。

secureElement.newSEService

newSEService(type: ‘serviceState’, callback: Callback<ServiceState>): SEService

建立一个可用于连接到系统中所有可用SE的新连接（服务）。连接过程较为耗时，所以此方法仅提供异步方式进行的。

仅当指定的回调或者当isConnected方法返回true时，该返回SEService对象是可用的。

系统能力： SystemCapability.Communication.SecureElement

参数：

参数名 类型 必填 说明
type string 是 ‘serviceState’
callback Callback<ServiceState> 是 返回SE服务状态的回调

返回值：

类型 说明
SEService SE服务实例

示例：

import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

try {
    let nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService occurs " + "exception: ${(e : BusinessError).message}");
}

SEService.getReaders

getReaders(): Reader[]

返回可用SE Reader的数组。返回的数组中不能有重复的对象。即使没有插入卡，也应列出所有可用的reader。

系统能力： SystemCapability.Communication.SecureElement

返回值：

类型 说明
Reader[] 返回可用Reader对象数组

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "excpetion: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
        nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        console.log("get reader successfully");
    } else {
        console.log("get reader failed");
    }
} catch (e) {
    console.log("getReaders " + "exception: ${(e : BusinessError).message}");
}

SEService.isConnected

isConnected(): boolean

检查SE服务是否已连接

系统能力： SystemCapability.Communication.SecureElement

返回值：

类型 说明
boolean true:SE 服务状态已连接 false:SE服务状态已断开

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService" + "exception: ${(e : BusinessError).message}");
}

try {
    let ret: boolean = false;
    // refer to newSEService for this.nfcSEService 
    if (nfcSEService != null) {
        ret = nfcSEService.isConnected();
    }
    if (ret) {
        console.log("get state: connected");
    } else {
        console.log("get state: not connected");
    }
} catch (e) {
        console.log("isConnected " + "exception: ${(e : BusinessError).message}");
}

SEService.shutdown

shutdown(): void

释放该service分配的所有SE资源。此后isConnected将返回false。

系统能力： SystemCapability.Communication.SecureElement

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    // refer to newSEService for this.nfcSEService 
    if (nfcSEService != null) {
        nfcSEService.shutdown();
    }
    console.log("shutdown successfully");
} catch (e) {
    console.log("shutdown exception:" + "exception: ${(e : BusinessError).message}");
}

SEService.getVersion

getVersion(): string

返回此实现所基于的OMA规范的版本号。

系统能力： SystemCapability.Communication.SecureElement

返回值：

类型 说明
string OMA版本号（例如，“3.3”表示开放移动API规范版本3.3）

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    // refer to newSEService for this.nfcSEService 
    if (nfcSEService != null) {
        console.log("version: " + nfcSEService.getVersion());
    }
} catch (e) {
    console.log("getVersion " + "exception: ${(e : BusinessError).message}");
}

Reader.getName

getName(): string

返回此reader的名称。如果此读卡器是SIM reader，则其名称必须为“SIM[Slot]”。如果读卡器是嵌入式SE reader，则其名称须为“eSE[slot]”。

系统能力： SystemCapability.Communication.SecureElement

返回值：

类型 说明
string reader名称

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
        nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        console.log(nfcOmaReaderList[0].getName());
    } else {
        console.log("getName failed");
    }
} catch (e) {
    console.log("getName " + "exception: ${(e : BusinessError).message}");
}

Reader.isSecureElementPresent

isSecureElementPresent(): boolean

检查当前Reader所对应的安全单元是否可用。

系统能力： SystemCapability.Communication.SecureElement

返回值：

类型 说明
boolean true: 安全单元可用， false: 安全单元不可用。

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, service state exception.

示例：


import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
        nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        if (nfcOmaReaderList[0].isSecureElementPresent()) {
            console.log("isSecureElementPresent success");
        } else {
            console.log("isSecureElementPresent failed");
        }
    } else {
        console.log("isSecureElementPresent failed");
    }
} catch (e) {
    console.log("isSecureElementPresent " + "exception: ${(e : BusinessError).message}");
}

Reader.openSession

openSession(): Session

连接到此reader中的SE。此方法在返回会话对象之前准备（初始化）SE进行通信。同一reader上可能同时打开多个会话。

系统能力： SystemCapability.Communication.SecureElement

返回值：

类型 说明
Session 用于创建channel的Session对象。

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, service state exception.
3300104 IOError, there is a communication problem to the reader or the SE.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
        nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        if (nfcOmaReaderList[0].openSession()) {
            console.log("get session successfully");
        } else {
            console.log("get session failed");
        }
    } else {
        console.log("OpenSession failed");
    }
} catch (e) {
    console.log("OpenSession " + "exception: ${(e : BusinessError).message}");
}

Reader.closeSessions

closeSessions(): void

关闭在此reader上打开的所有session。所有这些session打开的所有channel都将关闭。

系统能力： SystemCapability.Communication.SecureElement

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, service state exception.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
        nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        nfcOmaReaderList[0].closeSessions();
        console.log("closeSessions successfully");
    } else {
        console.log("closeSessions failed");
    }
} catch (e) {
  console.log("closeSessions " + "exception: ${(e : BusinessError).message}");
}

Session.getReader

getReader(): Reader

获取提供此session的reader。

系统能力： SystemCapability.Communication.SecureElement

返回值：

类型 说明
Reader 返回此session的Reader对象。

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
        nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
        if (omaSession.getReader() != null) {
            console.log("get reader successfully");
        } else {
            console.log("get reader failed");
        }
    } else {
        console.log("getReader failed");
    }
} catch (e) {
    console.log("getReader " + "exception: ${(e : BusinessError).message}");
}

Session.getATR

getATR(): number[]

获取该SE的ATR。如果该SE的ATR不可用，则应返回空数组。

系统能力： SystemCapability.Communication.SecureElement

返回值：

类型 说明
number[] 返回SE的ATR，SE的ATR不可用时，返回空的数组。

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, service state exception.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let omaATR : number[]|null = null;
let str : string = "";

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
        nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
        if (omaSession != null) {
            omaATR = omaSession.getATR();
        } else {
            console.log("getATR failed");
        }
    }
    if (omaATR != null && omaATR.length > 0) {
        str = 'getATR result:[';
        for (let i = 0; i < omaATR.length; ++i) {
            str += omaATR[i];
            str += ' ';
        }
        str += ']';
        console.log(str);
    } else {
        console.log("getATR failed");
    }
} catch (e) {
    console.log("getATR " + "exception: ${(e : BusinessError).message}");
}

Session.close

close(): void

关闭与SE的连接。这将关闭此应用程序与此SE打开的所有channel。

系统能力： SystemCapability.Communication.SecureElement

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, service state exception.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
        nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
        if (omaSession != null) {
            omaSession.close();
        } else {
            console.log("close failed");
        }
    }
} catch (e) {
    console.log("close " + "exception: ${(e : BusinessError).message}");
}

Session. isClosed

isClosed(): boolean

检查session是否关闭。

系统能力： SystemCapability.Communication.SecureElement

返回值：

类型 说明
boolean true：session状态已关闭，否则false。

错误码：

错误码的详细介绍请参见SE错误码。

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
        if (omaSession != null &&  omaSession.isClosed()) {
           console.log("isClosed success");
        } else {
            console.log("isClosed failed");
        }
    }
} catch (e) {
    console.log("isClosed " + "exception: ${(e : BusinessError).message}");
}

Session.closeChannels

closeChannels(): void

关闭此session上打开的所有channel。

系统能力： SystemCapability.Communication.SecureElement

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, service state exception.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
        if (omaSession != null) {
            omaSession.closeChannels();
            console.log("closeChannels success");
        } else {
            console.log("closeChannels failed");
        }
    }
} catch (e) {
    console.log("closeChannels " + "exception: ${(e : BusinessError).message}");
}

Session.openBasicChannel

openBasicChannel(aid: number[]): Promise<Channel>

获取基本channel，参考[ISO 7816-4]协议，返回Channel实例对象，SE不能提供新逻辑Channel或因缺乏可用逻辑Channel对象而无法获取访问控制规则，返回null。

系统能力： SystemCapability.Communication.SecureElement

参数：

参数名 类型 必填 说明
aid number[] 是 在此channel上选择的applet的AID数组或如果没有applet被选择时空的数组null。

返回值：

类型 说明
Channel 可用Channel对象实例。

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, an attempt is made to use an SE session that has been closed.
3300102 NoSuchElementError, the AID on the SE is not available or cannot be selected.
3300103 SecurityError, the calling application cannot be granted access to this AID or the default applet on this session.
3300104 IOError, there is a communication problem to the reader or the SE.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let aidArray : number[] = [720, 1080];
let getPromise : Promise<omapi.Channel>|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
        if (omaSession != null) {
            getPromise = omaSession.openBasicChannel(aidArray);
        } else {
            console.log("openBasicChannel1 failed");
        }
    }
    if (getPromise != null) {
        console.log("openBasicChannel1 get channel successfully");
    }
} catch (e) {
    console.log("openBasicChannel1 " + "exception: ${(e : BusinessError).message}");
}

Session.openBasicChannel

openBasicChannel(aid: number[], callback: AsyncCallback<Channel>): void

获取基本channel，参考[ISO 7816-4]协议，返回channel实例对象，SE不能提供新逻辑Channel或因缺乏可用逻辑Channel对象而无法获取访问控制规则，返回null。

系统能力： SystemCapability.Communication.SecureElement

参数：

参数名 类型 必填 说明
aid number[] 是 在此channel上选择的applet的AID数组或null 如果没有applet被选择。
callback AsyncCallback<Channel> 是 callback返回可用Channel对象实例。

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, an attempt is made to use an SE session that has been closed.
3300102 NoSuchElementError, the AID on the SE is not available or cannot be selected.
3300103 SecurityError, the calling application cannot be granted access to this AID or the default applet on this session.
3300104 IOError, there is a communication problem to the reader or the SE.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let aidArray : number[] = [720, 1080];

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
        if (omaSession != null) {
            omaSession.openBasicChannel(aidArray, (error, data) => {
                if (error) {
                    console.log("openBasicChannel2 failed:" + JSON.stringify(error));
                    return;
                }
                console.log("openBasicChannel2 get channel successfully");
            });
        }
    }
} catch (e) {
    console.log("openBasicChannel2 " + "exception: ${(e : BusinessError).message}");
}

Session.openBasicChannel

openBasicChannel(aid: number[], p2: number): Promise<Channel>

获取基本channel，参考[ISO 7816-4]协议，返回Channel实例对象，SE不能提供新逻辑Channel对象或因缺乏可用逻辑Channel对象而无法获取访问控制规则，返回null。

系统能力： SystemCapability.Communication.SecureElement

参数：

参数名 类型 必填 说明
aid number[] 是 在此channel上选择的applet的AID数组或null 如果没有applet被选择。
p2 number 是 在该channel上执行的SELECT APDU的P2参数。

返回值：

类型 说明
Channel 可用Channel对象实例。

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, an attempt is made to use an SE session that has been closed.
3300102 NoSuchElementError, the AID on the SE is not available or cannot be selected.
3300103 SecurityError, the calling application cannot be granted access to this AID or the default applet on this session.
3300104 IOError, there is a communication problem to the reader or the SE.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let getPromise : Promise<omapi.Channel>|null = null;
let nfcOmaChannel : omapi.Channel|null = null;
let aidArray : number[] = [720, 1080];
let p2 : number = 0x00;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
    }
    if (omaSession != null) {
        getPromise = omaSession.openBasicChannel(aidArray, p2);
        getPromise.then((channel) => {
            nfcOmaChannel = channel;
            console.log("openBasicChannel3 get channel successfully");
        })
    }
} catch (e) {
    console.log("openBasicChannel3 " + "exception: ${(e : BusinessError).message}");
}

Session.openBasicChannel

openBasicChannel(aid: number[], p2:number, callback: AsyncCallback<Channel>): void

获取基本channel，参考[ISO 7816-4]协议，返回channel实例对象，SE不能提供新逻辑Channel对象或因缺乏可用逻辑Channel对象而无法获取访问控制规则，返回null。

系统能力： SystemCapability.Communication.SecureElement

参数：

参数名 类型 必填 说明
aid number[] 是 在此channel上选择的applet的AID数组或null 如果没有applet被选择。
p2 number 是 此channel上执行SELECT APDU命令的P2参数。
callback AsyncCallback<Channel> 是 callback返回可用Channel对象实例。

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, an attempt is made to use an SE session that has been closed.
3300102 NoSuchElementError, the AID on the SE is not available or cannot be selected.
3300103 SecurityError, the calling application cannot be granted access to this AID or the default applet on this session.
3300104 IOError, there is a communication problem to the reader or the SE.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let nfcOmaChannel : omapi.Channel|null = null;
let aidArray : number[] = [720, 1080];
let p2 : number = 0x00;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
  if(nfcSEService != null) {
    nfcOmaReaderList = nfcSEService.getReaders();
  }
  if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
    omaSession = nfcOmaReaderList[0].openSession();
  }
  if (omaSession != null) {
    omaSession.openBasicChannel(aidArray, p2, (error , data) => {
      if (error) {
        console.log("openBasicChannel4 failed:" + JSON.stringify(error));
        return;
      }
      nfcOmaChannel = data;
      console.log("openBasicChannel4 get channel successfully");
    });
  }
} catch (e) {
  console.log("openBasicChannel4 " + "exception: ${(e : BusinessError).message}");
}

Session.openLogicalChannel

openLogicalChannel(aid: number[]): Promise<Channel>

打开指定SE的逻辑Channel对象。

系统能力： SystemCapability.Communication.SecureElement

参数：

参数名 类型 必填 说明
aid number[] 是 在该Channel对象上选择的applet AID数组。

返回值：

类型 说明
Channel 返回可用Channel对象实例，SE不能提供新的Channel对象或因缺乏可用逻辑Channel对象无法获取访问控制规则返回null。

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, an attempt is made to use an SE session that has been closed.
3300102 NoSuchElementError, the AID on the SE is not available or cannot be selected.
3300103 SecurityError, the calling application cannot be granted access to this AID or the default applet on this session.
3300104 IOError, there is a communication problem to the reader or the SE.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let aidArray : number[] = [720, 1080];
let getPromise : Promise<omapi.Channel>|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
        if (omaSession != null) {
            getPromise = omaSession.openLogicalChannel(aidArray);
        } else {
            console.log("openLogicalChannel1 failed");
        }
    }
    if (getPromise != null) {
        console.log("openLogicalChannel1 get channel successfully");
    }
} catch (e) {
    console.log("openLogicalChannel1 " + "exception: ${(e : BusinessError).message}");
}

Session.openLogicalChannel

openLogicalChannel(aid:number[], callback: AsyncCallback<Channel>): void

打开指定SE的逻辑Channel对象。

系统能力： SystemCapability.Communication.SecureElement

参数：

参数名 类型 必填 说明
aid number[] 是 在该Channel对象上被选择的applet AID数组。
callback AsyncCallback<Channel> 是 callback返回可用Channel对象实例，SE不能提供新的channel或因缺乏可用逻辑Channel对象无法获取访问控制规则返回null。

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, an attempt is made to use an SE session that has been closed.
3300102 NoSuchElementError, the AID on the SE is not available or cannot be selected.
3300103 SecurityError, the calling application cannot be granted access to this AID or the default applet on this session.
3300104 IOError, there is a communication problem to the reader or the SE.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let aidArray : number[] = [720, 1080];

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
    }
    if (omaSession != null) {
        omaSession.openLogicalChannel(aidArray, (error, data) => {
            if (error) {
                console.log("openLogicalChannel2 failed:" + JSON.stringify(error));
                return;
            }
            console.log("openLogicalChannel2 get channel successfully");
        });
    }
} catch (e) {
    console.log("openLogicalChannel2 " + "exception: ${(e : BusinessError).message}");
}

Session.openLogicalChannel

openLogicalChannel(aid: number[], p2: number): Promise<Channel>

使用SE打开逻辑通道，选择由给定AID数组（AID非null且长度不为0）表示的applet.

如果AID数组长度为0，则该方法将通过发送一个select命令来选择SE的Issuer Security Domain，该命令的AID长度为0（如[GPCS]中所定义）。

如果AID为Null，则该方法应仅发送MANAGE CHANNEL Open（管理通道打开），而不应发送SELECT（选择）命令。在这种情况下，默认情况下将选择与逻辑通道关联的默认applet.

P2通常为0x00。设备应允许P2的任何值，并且应允许以下值： 0x00, 0x04, 0x08, 0x0C (如 ISO 7816-4中所定义).

系统能力： SystemCapability.Communication.SecureElement

参数：

参数名 类型 必填 说明
aid number[] 是 在该Channel对象上被选择的applet AID数组。
p2 number 是 此channel上执行SELECT APDU命令的P2参数。

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, an attempt is made to use an SE session that has been closed.
3300102 NoSuchElementError, the AID on the SE is not available or cannot be selected.
3300103 SecurityError, the calling application cannot be granted access to this AID or the default applet on this session.
3300104 IOError, there is a communication problem to the reader or the SE.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let getPromise : Promise<omapi.Channel>|null = null;
let nfcOmaChannel : omapi.Channel|null = null;
let aidArray : number[] = [720, 1080];
let p2 : number = 0x00;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
    }
    if (omaSession != null) {
        getPromise = omaSession.openLogicalChannel(aidArray, p2);
        getPromise.then((channel) => {
            nfcOmaChannel = channel;
            console.log("openLogicalChannel3 get channel successfully");
        })
    }
} catch (e) {
    console.log("openLogicalChannel3 " + "exception: ${(e : BusinessError).message}");
}

Session.openLogicalChannel

openLogicalChannel(aid: number[], p2: number, callback: AsyncCallback<Channel>):void

使用SE打开逻辑通道，选择由给定AID数组（AID非null且长度不为0）表示的applet.

如果AID数组长度为0，则该方法将通过发送一个select命令来选择SE的Issuer Security Domain，该命令的AID长度为0（如[GPCS]中所定义）。

如果AID为Null，则该方法应仅发送MANAGE CHANNEL Open（管理通道打开），而不应发送SELECT（选择）命令。在这种情况下，默认情况下将选择与逻辑通道关联的默认applet.

P2通常为0x00。设备应允许P2的任何值，并且应允许以下值： 0x00, 0x04, 0x08, 0x0C (如 ISO 7816-4中所定义).

系统能力： SystemCapability.Communication.SecureElement

参数：

参数名 类型 必填 说明
aid number[] 是 在该Channel对象上被选择的applet AID数组。
p2 number 是 此channel上执行SELECT APDU命令的P2参数。
callback AsyncCallback<Channel> 是 callback返回可用Channel对象实例，SE不能提供新的Channel对象或因缺乏可用逻辑Channel对象无法获取访问控制规则返回null。

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, an attempt is made to use an SE session that has been closed.
3300102 NoSuchElementError, the AID on the SE is not available or cannot be selected.
3300103 SecurityError, the calling application cannot be granted access to this AID or the default applet on this session.
3300104 IOError, there is a communication problem to the reader or the SE.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let nfcOmaChannel : omapi.Channel|null = null;
let aidArray : number[] = [720, 1080];
let p2 : number = 0x00;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
  if(nfcSEService != null) {
    nfcOmaReaderList = nfcSEService.getReaders();
  }
  if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
    omaSession = nfcOmaReaderList[0].openSession();
  }
  if (omaSession != null) {
    omaSession.openLogicalChannel(aidArray, p2, (error, data) => {
      if (error) {
        console.log("openLogicalChannel4 failed:" + JSON.stringify(error));
        return;
      }
      nfcOmaChannel = data;
      console.log("openLogicalChannel4 get channel successfully");
    });
  }
} catch (e) {
  console.log("openLogicalChannel4 " + "exception: ${(e : BusinessError).message}");
}

Channel. getSession

getSession(): Session

获取打开该channel的Session对象。

系统能力： SystemCapability.Communication.SecureElement

返回值：

类型 说明
Session 该channel绑定的Session 对象。

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let getPromise : Promise<omapi.Channel>|null = null;
let aidArray : number[] = [720, 1080];
let p2 : number = 0x00;
let mySession : omapi.Session|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
    }
    if (omaSession != null) {
        getPromise = omaSession.openLogicalChannel(aidArray, p2);
        getPromise.then((channel) => {
            mySession = channel.getSession();
            console.log("openLogicalChannel get channel successfully");
        })
    }
    if (mySession != null) {
        console.log("get session successfully");
    } else {
        console.log("get session failed");
    }
} catch (e) {
    console.log("get session " + "exception: ${(e : BusinessError).message}");
}

Channel. close

close(): void

关闭与SE的此channel。

系统能力： SystemCapability.Communication.SecureElement

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let getPromise : Promise<omapi.Channel>|null = null;
let aidArray : number[] = [720, 1080];
let p2 : number = 0x00;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
    }
    if (omaSession != null) {
        getPromise = omaSession.openLogicalChannel(aidArray, p2);
        getPromise.then((channel) => {
            channel.close();
            console.log("channel close successfully");
        })
    }
} catch (e) {
    console.log("channel close " + "exception: ${(e : BusinessError).message}");
}

Channel. isBasicChannel

isBasicChannel(): boolean

检查该channel是否为基本channel。

系统能力： SystemCapability.Communication.SecureElement

返回值：

类型 说明
boolean true: 该channel是基本channel false：该channel不是基本channel 。

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let getPromise : Promise<omapi.Channel>|null = null;
let aidArray : number[] = [720, 1080];
let p2 : number = 0x00;
let ret : boolean = false;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
    }
    if (omaSession != null) {
        getPromise = omaSession.openLogicalChannel(aidArray, p2);
        getPromise.then((channel) => {
            ret = channel.isBasicChannel();
        })
    }
    if (ret) {
        console.log("isBasicChannel TRUE");
    } else {
        console.log("isBasicChannel FALSE");
    }
} catch (e) {
    console.log("isBasicChannel " + "exception: ${(e : BusinessError).message}");
}

Channel. isClosed

isClosed(): boolean

检查该channel是否为closed。

系统能力： SystemCapability.Communication.SecureElement

返回值：

类型 说明
boolean true:channel是closed false: 不是closed状态。

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let getPromise : Promise<omapi.Channel>|null = null;
let aidArray : number[] = [720, 1080];
let p2 : number = 0x00;
let ret : boolean = false;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
    }
    if (omaSession != null) {
        getPromise = omaSession.openLogicalChannel(aidArray, p2);
        getPromise.then((channel) => {
            ret = channel.isClosed();
        })
    }
    if (ret) {
        console.log("channel isClosed TRUE");
    } else {
        console.log("channel isClosed False");
    }
} catch (e) {
    console.log("isBasicChannel " + "exception: ${(e : BusinessError).message}");
}

Channel. getSelectResponse

getSelectResponse():number[]

返回从应用程序选择命令接收的数据，包括在applet选择时接收的状态字。

系统能力： SystemCapability.Communication.SecureElement

返回值：

类型 说明
number[] 返回从应用程序选择命令接收的数据，包括在applet选择时接收的状态字。

错误码：

错误码的详细介绍请参见SE错误码。

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let getPromise : Promise<omapi.Channel>|null = null;
let aidArray : number[] = [720, 1080];
let p2 : number = 0x00;
let responseArray : number[] = [720, 1080];
let str : string = "";

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
    }
    if (omaSession != null) {
        getPromise = omaSession.openLogicalChannel(aidArray, p2);
        getPromise.then((channel) => {
            responseArray = channel.getSelectResponse();
        })
    }
    if (responseArray) {
        str = "getSelectResponse result:[";
        for (let i = 0; i < responseArray.length; ++i) {
            str += responseArray[i];
            str += ' ';
        }
        str += ']';
        console.log(str);
    } else {
        console.log("getSelectResponse result is null");
    }
} catch (e) {
    console.log("isBasicChannel " + "exception: ${(e : BusinessError).message}");
}

Channel. transmit

transmit(command: number[]): Promise

向SE发送APDU命令（根据ISO/IEC 7816）。

系统能力： SystemCapability.Communication.SecureElement

参数：

参数名 类型 必填 说明
command number[] 是 在该channel上被选择的applet AID数组。

返回值：

类型 说明
number[] 响应结果数组。

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, an attempt is made to use an SE session or channel that has been closed.
3300103 SecurityError, the command is filtered by the security policy.
3300104 IOError, there is a communication problem to the reader or the SE.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let getPromise : Promise<omapi.Channel>|null = null;
let aidArray : number[] = [720, 1080];
let p2 : number = 0x00;
let responseArray : Promise<number[]>|null = null;

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
    }
    if (omaSession != null) {
        getPromise = omaSession.openLogicalChannel(aidArray, p2);
        getPromise.then((channel) => {
            let command: number[] = [100, 200];
            // refer to Session.openBasicChannel for this.nfcOmaChannel
            responseArray = channel.transmit(command);
        })
    }
    if (responseArray != null) {
        console.log("transmit1 success");
    } else {
        console.log("transmit1 failed");
    }
} catch (e) {
    console.log("transmit1 " + "exception: ${(e : BusinessError).message}");
}

Channel. transmit

transmit(command: number[], callback: AsyncCallback): void

向SE发送APDU命令（根据ISO/IEC 7816）。

系统能力： SystemCapability.Communication.SecureElement

参数：

参数名 类型 必填 说明
command number[] 是 在该Channel上被选择的applet AID数组。
callback AsyncCallback 是 返回接收到的响应的回调，number数组。

错误码：

错误码的详细介绍请参见SE错误码。

错误码ID 错误信息
3300101 IllegalStateError, an attempt is made to use an SE session or channel that has been closed.
3300103 SecurityError, the command is filtered by the security policy.
3300104 IOError, there is a communication problem to the reader or the SE.

示例：

import omapi from '@ohos.secureElement';
import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';

let nfcSEService : omapi.SEService|null = null;
let nfcOmaReaderList : omapi.Reader[]|null = null;
let omaSession : omapi.Session|null = null;
let getPromise : Promise<omapi.Channel>|null = null;
let aidArray : number[] = [720, 1080];
let p2 : number = 0x00;
let str : string = "";

try {
    nfcSEService = secureElement.newSEService("serviceState", (state) => {
        if (state == secureElement.ServiceState.DISCONNECTED) {
            console.log("Service state is Disconnected");
        } else {
            console.log("Service state is Connected");
        }
    });
} catch (e) {
    console.log("newSEService " + "exception: ${(e : BusinessError).message}");
}

try {
    if(nfcSEService != null) {
      nfcOmaReaderList = nfcSEService.getReaders();
    }
    if (nfcOmaReaderList != null && nfcOmaReaderList.length > 0) {
        omaSession = nfcOmaReaderList[0].openSession();
    }
    if (omaSession != null) {
        getPromise = omaSession.openLogicalChannel(aidArray, p2);
        getPromise.then((channel) => {
            let command: number[] = [100, 200];
            // refer to Session.openBasicChannel for this.nfcOmaChannel
            channel.transmit(command, (error, data) => {
                if (error) {
                    console.log("transmit2 exception:" + JSON.stringify(error));
                    return;
                }
                str = "transmit2 result:[";
                for (let i = 0; i < data.length; ++i) {
                    str += data[i];
                    str += " ";
                }
                str += "]";
                console.log(str)
            });
        })
    }
} catch (e) {
    console.log("transmit2 " + "exception: ${(e : BusinessError).message}");
}

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