PHP实现DES/ECB/PKCS5Padding加密兼容Java SHA1PRNG算法

在使用php调用java接口时，遇到了两边加密结果不一致的问题。经过沟通发现接口方使用了SHA1PRNG算法，对原密码计算后做为Des的加密Key。

因此在php中也需要先对原密码做相应计算才能保持结果一致。

java加密

public static final String ALGORITHM = "DES";
public static final String TRANSFORMATION = "DES/ECB/PKCS5Padding";

    public static String encrypt(String contents, String password) throws Exception {
        try
        {
            Cipher cipher = Cipher.getInstance(TRANSFORMATION);
            cipher.init(Cipher.ENCRYPT_MODE, generateKey(password));
            byte[] output = cipher.doFinal(contents.getBytes("utf-8"));
            return new String(Base64.encodeBase64(output), "utf-8");
        }
        catch (Exception e)
        {
            logger.error("加密失败:{}",e);
        }

        return null;

    }

    public static Key generateKey(String password) throws Exception {
        return generateKey(password.getBytes());
    }

    public static Key generateKey(byte[] seed) throws Exception {
        KeyGenerator keyGenerator = KeyGenerator.getInstance(ALGORITHM);
        SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
        secureRandom.setSeed(seed);
        keyGenerator.init(56,secureRandom);
        Key key = keyGenerator.generateKey();
        return key;
    }

php加密

$key = "012345";  
$data = "1866666345";
$key = substr(openssl_digest(openssl_digest($key, 'sha1', true), 'sha1', true), 0, 16);
$out = openssl_encrypt($data, 'DES-ECB', $key, OPENSSL_RAW_DATA);
echo base64_encode($out);

参考资料

https://www.cnblogs.com/qdpurple/p/10270593.html

https://blog.csdn.net/ranlv91/article/details/81916654