php使用openssl进行Rsa长数据加密117解密128

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：

<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
本文地址：http://blog.csdn.net/leedaning/article/details/51780511

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