php使用openssl進行Rsa長資料加密117解密128

PHP使用openssl進行Rsa加密，如果要加密的明文太長則會出錯，解決方法：加密的時候117個字元加密一次，然後把所有的密文拼接成一個密文；解密的時候需要128個字元解密一下，然後拼接成資料。

加密：

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

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

        <span>$crypto</span> = <span>''</span>;

        <span>foreach</span> (str_split(<span>$originalData</span>, <span>117</span>) as <span>$chunk</span>) {

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

            <span>$crypto</span> .= <span>$encryptData</span>;
        }

        <span>return</span> base64_encode(<span>$crypto</span>);
    }</code>

解密：

<code>    /<span>**</span>
     * 私钥解密
     * <span>@param</span><span>$encryptData</span><span>*/</span>    /<span>*function</span> decrypt(<span>$encryptData</span>){

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

            <span>return</span><span>$decryptData</span>;

        } <span>else</span> {

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

        <span>$crypto</span> = <span>''</span>;

        <span>foreach</span> (str_split(base64_decode(<span>$encryptData</span>), <span>128</span>) as <span>$chunk</span>) {

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

            <span>$crypto</span> .= <span>$decryptData</span>;
        }

        <span>return</span><span>$crypto</span>;
    }</code>

Author:leedaning
本文網址：http://blog.csdn.net/leedaning/article/details/51780511

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