解密代码如下：

    /**
     * 私钥解密
     *
     * @param ciphertext 被加密字符串
     * @return 解密后字符串
     */
    public static String decryptByPriKey(String ciphertext, String privateKeyStr) {
        log.info("私钥解密 ciphertext：【{}】，privateKeyStr：【{}】",ciphertext ,privateKeyStr);
        PrivateKey privateKey = null;
        try {
            Reader privateKeyReader = new StringReader(privateKeyStr);
            PEMParser privatePemParser = new PEMParser(privateKeyReader);
            Object privateObject = privatePemParser.readObject();
            Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
            if (privateObject instanceof PEMKeyPair) {
                PEMKeyPair pemKeyPair = (PEMKeyPair) privateObject;
                JcaPEMKeyConverter converter = new JcaPEMKeyConverter().setProvider("BC");
                privateKey = converter.getPrivateKey(pemKeyPair.getPrivateKeyInfo());
            }
            Cipher rsa = Cipher.getInstance("RSA/ECB/PKCS1Padding", "BC");
            rsa.init(Cipher.DECRYPT_MODE, privateKey);
            byte[] utf8 = rsa.doFinal(Base64.getDecoder().decode(ciphertext));
            return new String(utf8, StandardCharsets.UTF_8);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

报错如下：

org.bouncycastle.jcajce.provider.util.BadBlockException: unable to decrypt block
	at org.bouncycastle.jcajce.provider.asymmetric.rsa.CipherSpi.getOutput(Unknown Source)
	at org.bouncycastle.jcajce.provider.asymmetric.rsa.CipherSpi.engineDoFinal(Unknown Source)
	at javax.crypto.Cipher.doFinal(Cipher.java:2164)
	at com.qdum.workwechat.common.utils.vm.RSAUtils.decryptByPriKey(RSAUtils.java:87)
	at com.qdum.workwechat.common.utils.vm.WorkMsgBackUpUtil.main(WorkMsgBackUpUtil.java:282)
Caused by: org.bouncycastle.crypto.InvalidCipherTextException: block incorrect
	at org.bouncycastle.crypto.encodings.PKCS1Encoding.decodeBlock(Unknown Source)
	at org.bouncycastle.crypto.encodings.PKCS1Encoding.processBlock(Unknown Source)
	... 5 more

疑问，是什么原因会导致这个问题那，会话存档公钥配置错误？