c

<code class="c#">public static string Decrypt(string Text, string sKey)
        {
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
            int num = Text.Length / 2;
            byte[] buffer = new byte[num];
            for (int i = 0; i </code>

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php7

<code class="php">public function encrypt($input, $key)
    {

        $size = mcrypt_get_block_size(MCRYPT_DES, MCRYPT_MODE_CBC);
        $input = $this->pkcs5_pad($input, $size);
        $td = mcrypt_module_open(MCRYPT_DES, '', MCRYPT_MODE_CBC, '');
        $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        mcrypt_generic_init($td, $key, $iv);
        $data = mcrypt_generic($td, $input);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        $data = base64_encode($data);
        return $data;
    }

    private function pkcs5_pad($text, $blocksize)
    {
        $pad = $blocksize - (strlen($text) % $blocksize);
        return $text . str_repeat(chr($pad), $pad);
    }

    public function decrypt($sStr, $sKey)
    {
        $decrypted = mcrypt_decrypt(
            MCRYPT_DES,
            $sKey,
            base64_decode($sStr),
            MCRYPT_MODE_CBC
        );

        $dec_s = strlen($decrypted);
        $padding = ord($decrypted[$dec_s - 1]);
        $decrypted = substr($decrypted, 0, -$padding);
        return $decrypted;
    }</code>

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回复内容：

谢谢大家.

如下,有c#的加解密方法,我自己写了个php7的实现.但是加解密的结果和c#的完全不一样,请问哪里错了?本人菜鸟,多谢各位.

c

<code class="c#">public static string Decrypt(string Text, string sKey)
        {
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
            int num = Text.Length / 2;
            byte[] buffer = new byte[num];
            for (int i = 0; i </code>

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php7

<code class="php">public function encrypt($input, $key)
    {

        $size = mcrypt_get_block_size(MCRYPT_DES, MCRYPT_MODE_CBC);
        $input = $this->pkcs5_pad($input, $size);
        $td = mcrypt_module_open(MCRYPT_DES, '', MCRYPT_MODE_CBC, '');
        $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        mcrypt_generic_init($td, $key, $iv);
        $data = mcrypt_generic($td, $input);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        $data = base64_encode($data);
        return $data;
    }

    private function pkcs5_pad($text, $blocksize)
    {
        $pad = $blocksize - (strlen($text) % $blocksize);
        return $text . str_repeat(chr($pad), $pad);
    }

    public function decrypt($sStr, $sKey)
    {
        $decrypted = mcrypt_decrypt(
            MCRYPT_DES,
            $sKey,
            base64_decode($sStr),
            MCRYPT_MODE_CBC
        );

        $dec_s = strlen($decrypted);
        $padding = ord($decrypted[$dec_s - 1]);
        $decrypted = substr($decrypted, 0, -$padding);
        return $decrypted;
    }</code>

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使用PHP自带的OpenSSL不好了？