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【企业微信】修复 sun.security.util 在高版本 java 中无法访问的问题，改为通过 bouncycastle 库解析私钥 #3216

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Merged
merged 1 commit into from
Jan 12, 2024
Merged

【企业微信】修复 sun.security.util 在高版本 java 中无法访问的问题，改为通过 bouncycastle 库解析私钥 #3216

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5 changes: 5 additions & 0 deletions weixin-java-cp/pom.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -81,6 +81,11 @@
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk18on</artifactId>
<version>1.77</version>
</dependency>

<dependency>
<groupId>org.assertj</groupId>
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20 changes: 13 additions & 7 deletions weixin-java-cp/src/main/java/me/chanjar/weixin/cp/util/crypto/WxCpCryptUtil.java
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Expand Up @@ -4,8 +4,7 @@
import me.chanjar.weixin.common.util.crypto.WxCryptUtil;
import me.chanjar.weixin.cp.config.WxCpConfigStorage;
import org.apache.commons.lang3.StringUtils;
import sun.security.util.DerInputStream;
import sun.security.util.DerValue;
import org.bouncycastle.asn1.pkcs.RSAPrivateKey;

import javax.crypto.Cipher;
import java.nio.charset.StandardCharsets;
Expand Down Expand Up @@ -105,11 +104,18 @@ public static String decryptPriKeyByPKCS1(String encryptRandomKey, String msgAud
.replace(" ", "");

byte[] keyBytes = Base64.getDecoder().decode(privateKey);
DerValue[] seq = new DerInputStream(keyBytes).getSequence(0);
RSAPrivateCrtKeySpec keySpec = new RSAPrivateCrtKeySpec(seq[1].getBigInteger(), seq[2].getBigInteger(),
seq[3].getBigInteger(), seq[4].getBigInteger(),
seq[5].getBigInteger(), seq[6].getBigInteger(),
seq[7].getBigInteger(), seq[8].getBigInteger());
// Java 8 以后 sun.security.util.DerInputStream 和 sun.security.util.DerValue 无法使用
// 因此改为通过 org.bouncycastle:bcprov-jdk18on 来完成 ASN1 编码数据解析
final RSAPrivateKey key = RSAPrivateKey.getInstance(keyBytes);
final RSAPrivateCrtKeySpec keySpec = new RSAPrivateCrtKeySpec(
key.getModulus(),
key.getPublicExponent(),
key.getPrivateExponent(),
key.getPrime1(),
key.getPrime2(),
key.getExponent1(),
key.getExponent2(),
key.getCoefficient());

PrivateKey priKey = KeyFactory.getInstance("RSA").generatePrivate(keySpec);
Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
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