php使用openssl进行Rsa长数据加密(117)解密(128) 和 DES 加密解密

PHP使用openssl进行Rsa加密,如果要加密的明文太长则会出错,解决方法:加密的时候117个字符加密一次,然后把所有的密文拼接成一个密文;解密的时候需要128个字符解密一下,然后拼接成数据。

加密:

/**
     * 加密
     * @param $originalData
     * @return string|void
     */
    /*function encrypt($originalData){

        // if (openssl_private_encrypt($originalData, $encryptData, $this->rsaPrivateKey)) {
        if (openssl_public_encrypt($originalData, $encryptData, $this->rsaPublicKey)) {
            return base64_encode($encryptData);
        } else {
            return false;
        }
    }*/
    function encrypt($originalData){

        $crypto = '';

        foreach (str_split($originalData, 117) as $chunk) {

            openssl_public_encrypt($chunk, $encryptData, $this->rsaPublicKey);

            $crypto .= $encryptData;
        }

        return base64_encode($crypto);
    }

解密:

/**
     * 私钥解密
     * @param $encryptData
     */

    /*function decrypt($encryptData){

        // if (openssl_public_decrypt(base64_decode($encryptData), $decryptData, $this->rsaPublicKey)) {
        if (openssl_private_decrypt(base64_decode($encryptData), $decryptData, $this->rsaPrivateKey)) {

            return $decryptData;

        } else {

            return false;
        }
    }*/
    function decrypt($encryptData){

        $crypto = '';

        foreach (str_split(base64_decode($encryptData), 128) as $chunk) {

            openssl_private_decrypt($chunk, $decryptData, $this->rsaPrivateKey);

            $crypto .= $decryptData;
        }

        return $crypto;
    }

DES 加密解密:

function encrypt($encrypt,$key){

	$passcrypt = mcrypt_encrypt(MCRYPT_DES ,$key, $encrypt, MCRYPT_MODE_CBC, $key);

	$encode = base64_encode($passcrypt);

	return $encode;

}

function decrypt($decrypt,$key){

	$decoded = base64_decode($decrypt);

	$decrypted = mcrypt_decrypt(MCRYPT_DES ,$key, $decoded, MCRYPT_MODE_ECB, $key);

	return $decrypted;
}

 

AES 加密解密

//为 CBC 模式创建随机的初始向量
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);

$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);

function aesEncrypt($encrypt, $key, $iv){

	$passcrypt = mcrypt_encrypt(MCRYPT_RIJNDAEL_128 ,$key, $encrypt, MCRYPT_MODE_CBC, $iv);

	//将初始向量附加在密文之后,以供解密时使用
	$passcrypt = $iv . $passcrypt;

	//对密文进行 base64 编码
	$encode = base64_encode($passcrypt);

	return $encode;

}

function aesDecrypt($decrypt, $key, $iv_size){

	$decoded = base64_decode($decrypt);

	//初始向量大小,可以通过 mcrypt_get_iv_size() 来获得
	$iv_dec = substr($decoded, 0, $iv_size);

	//获取除初始向量外的密文
	$decoded = substr($decoded, $iv_size);

	//可能需要从明文末尾移除 0
	$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128 , $key, $decoded, MCRYPT_MODE_ECB, $iv_dec);

	return $decrypted;
}

  

posted @ 2016-10-18 17:06  inroam  阅读(1244)  评论(0编辑  收藏  举报