本篇文档以 Java 为例，讲解作为应用与 IDaaS 的对接。
若您希望了解对接原理和调用流程，请参考 账户同步接入概述。
接入账户同步可能需要处理两点：
验签
解密（可选）
进行完上述过程后，即可获取到该次事件的请求内容，应用自行处理即可。
1. 验签
参考 账户同步 - IDaaS 同步到应用 中操作，从应用同步配置中获取公钥端点。
在本文档示例中，提供了直接从公钥端点获取公钥的 Java 工具类。若您所选开发语言需要公钥信息，可能需要您点开公钥端点，获取公钥内容，转化成 .pem 文件格式存储在本地。
公钥示例：
{
"keys": [
{
"kty": "RSA",
"e": "AQAB",
"use": "sig",
"kid": "KEY3PdQDx97********h83p8husNSC9AKMH",
"n": "rLUnH5PNeGUZE-********GGIxyM5O7TDdaG4********D9mV1CjE8hVHBxXM96IcCCH_1xmUZEZRp_MBP6m2XeNWUXanCpeyuIAD2kxmaQAqituZdIlT4l3-q9gtccdY-khaE-OfH9qYZhlxFcYj0gVtOvKZFIkuGhME4IQJd_RAWS3OPXxtbGhO2fZYCiuuc8NWub5mcVQnqsy5aJPLwHbVwVUwYNOmaq97_m2TtPcIVWtw7AOzX8O78UrYnYt_QPrv7uVdJMbHleSOx2A1IXqrAkJWecwFfvTsBTCUOPPDeVRQEHzzwmf3zpz5KMgHZU1I5pyqi0KJ6BuMHWw"
}
]
}添加 Maven 依赖：
<dependency>
<groupId>org.bitbucket.b_c</groupId>
<artifactId>jose4j</artifactId>
<version>0.7.9</version>
</dependency>工具类代码如下，用于从 IDaaS 公钥端点获取公钥并验签，您可以直接复制使用：
import org.apache.commons.codec.binary.StringUtils;
import org.jose4j.jwk.JsonWebKey;
import org.jose4j.jwk.JsonWebKeySet;
import org.jose4j.jwt.consumer.JwtConsumer;
import org.jose4j.jwt.consumer.JwtConsumerBuilder;
import org.jose4j.lang.JoseException;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.nio.charset.StandardCharsets;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
public class JwtUtil {
private final static ConcurrentMap<String, JsonWebKeySet> IDAAS_SIGN_JWK_SET_MAP = new ConcurrentHashMap<>();
public static JwtConsumer createJwtConsumerFromUrl(String jwkUrl, String appId) {
try {
final JsonWebKeySet jsonWebKeySet = getJsonWebKeySetByUrl(jwkUrl);
return createJwtConsumer(jsonWebKeySet, appId);
} catch (Exception e) {
throw new RuntimeException("Fetch JWKs from url failed: " + e.getMessage() + ", " + jwkUrl, e);
}
}
public static JwtConsumer createJwtConsumer(JsonWebKeySet jsonWebKeySet, String appId) {
final JwtConsumerBuilder jwtConsumerBuilder = new JwtConsumerBuilder();
jwtConsumerBuilder.setExpectedIssuer("urn:alibaba:idaas:app:event");
jwtConsumerBuilder.setRequireExpirationTime();
jwtConsumerBuilder.setRequireJwtId();
jwtConsumerBuilder.setRequireIssuedAt();
jwtConsumerBuilder.setRequireExpirationTime();
jwtConsumerBuilder.setMaxFutureValidityInMinutes(1);
jwtConsumerBuilder.setAllowedClockSkewInSeconds(120);
jwtConsumerBuilder.setExpectedAudience(appId);
jwtConsumerBuilder.setVerificationKeyResolver((jws, nestingContext) -> {
final String signKeyId = jws.getKeyIdHeaderValue();
for (JsonWebKey jsonWebKey : jsonWebKeySet.getJsonWebKeys()) {
if (StringUtils.equals(jsonWebKey.getKeyId(), signKeyId)) {
return jsonWebKey.getKey();
}
}
throw new RuntimeException("Cannot find verification key: " + signKeyId);
});
return jwtConsumerBuilder.build();
}
synchronized private static JsonWebKeySet getJsonWebKeySetByUrl(String jwkUrlString) throws IOException, JoseException {
JsonWebKeySet jsonWebKeySet = IDAAS_SIGN_JWK_SET_MAP.get(jwkUrlString);
if (jsonWebKeySet == null) {
jsonWebKeySet = innerGetJsonWebKeySetByUrl(jwkUrlString);
IDAAS_SIGN_JWK_SET_MAP.put(jwkUrlString, jsonWebKeySet);
}
return jsonWebKeySet;
}
private static JsonWebKeySet innerGetJsonWebKeySetByUrl(String jwkUrlString) throws IOException, JoseException {
final URL jwkUrl = new URL(jwkUrlString);
final URLConnection urlConnection = jwkUrl.openConnection();
urlConnection.setConnectTimeout(50000);
urlConnection.setReadTimeout(50000);
final String jwkSetJson = new String(readAll(urlConnection.getInputStream()), StandardCharsets.UTF_8);
return new JsonWebKeySet(jwkSetJson);
}
public static byte[] readAll(InputStream inputStream) throws IOException {
final byte[] buffer = new byte[1024 * 8];
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
for (int len; ((len = inputStream.read(buffer)) != -1); ) {
baos.write(buffer, 0, len);
}
return baos.toByteArray();
}
}调用示例代码：
//公钥->IDaaS应用同步配置里,访问应用公钥端点后获取到。
String publicKey = "{\n"
+ " \"keys\": [\n"
+ " {\n"
+ " \"kty\": \"RSA\",\n"
+ " \"e\": \"AQAB\",\n"
+ " \"use\": \"sig\",\n"
+ " \"kid\": \"KEYHH4yFa1c*******qNo1nJ7nM2FR3595P1\",\n"
+ " \"n\": \"oy_xxxxxxxxxxxxxxxxxxxxxxx95d1padSEABqIbcTKcnlTaET3WHaR"
+ "-3MvsooeZWluv94GQEp-U2jzM1adgTqBl_7KPjUk0dwrZbob_8pOLX5UQMF7Oo_nH5-H5EyL9-yGGhFA4oeuA"
+ "-b73qXShxP7eHs5xTT1kiYEu2NE3rBZdtrRwUiC_h1DvZMtyWFOPwm3dpLiwCcdlgcKvVuSEXyCBj6Gjevn3_G1guVQ2kHlNOVyNn6Ky1iGQJzXctJCEJ5fnBRs4XZZbPNSciYMD2-__cRdbYPtGyyuoEAfouw\"\n"
+ " }\n"
+ " ]\n"
+ "}";;
//应用ID->应用列表中，找到对应的应用ID
String appId = "app_mjavzivahje6zxxxx";
//JwtUtil->下面已提供JwtUtil工具类
JwtConsumer jwtConsumer = JwtUtil.createJwtConsumer(new JsonWebKeySet(publicKey),appId);
//JWT验签后，获取到payload
//event参数值->接口接收到的参数值
JwtClaims jwtClaims = jwtConsumer.processToClaims("event参数的值");
//获取到具体的payload
Map<String, Object> map = jwtClaims.getClaimsMap();
//接下来，根据具体的数据，做对应的业务处理2. 解密（可选）
数据解密
若应用开启业务数据加密，事件数据将通过 cipher_data 加密传递，业务方需要解密，以获取到同步数据。
IDaaS 支持自主填写加密密钥，也可由 IDaaS 生成。
将密钥复制出来，解密时使用。
新增 Maven 依赖：
<dependency>
<groupId>org.bitbucket.b_c</groupId>
<artifactId>jose4j</artifactId>
<version>0.7.9</version>
</dependency>
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.70</version>
</dependency>解密示例代码：
public String decrypte(String cipherData,String key) throws JoseException {
String alg = "AES";
// 生成使用密钥生成 KeySpec
SecretKeySpec secretKeySpec = new SecretKeySpec(Hex.decode(key), alg);
JsonWebKey jsonWebKey = JsonWebKey.Factory.newJwk(secretKeySpec);
JsonWebEncryption receiverJwe = new JsonWebEncryption();
// 设定加解密机制
AlgorithmConstraints algConstraints = new AlgorithmConstraints(AlgorithmConstraints.ConstraintType.PERMIT, new String[]{"dir"});
receiverJwe.setAlgorithmConstraints(algConstraints);
AlgorithmConstraints encConstraints = new AlgorithmConstraints(
AlgorithmConstraints.ConstraintType.PERMIT, new String[]{"A256GCM", "A192GCM", "A128GCM"});
receiverJwe.setContentEncryptionAlgorithmConstraints(encConstraints);
// 传入密钥和密文
receiverJwe.setKey(jsonWebKey.getKey());
receiverJwe.setCompactSerialization(cipherData);
// 返回解密内容
return new String(receiverJwe.getPlaintextBytes(), StandardCharsets.UTF_8);
}