使用OpenSSL替代MCrypt實現AES加解密

MCrypt實現AES加解密

<?php

define( "KEY", "16位" );
define( "IV", "16位" );

function aes_encode( $sourcestr ) {
    return base64_encode( mcrypt_encrypt( MCRYPT_RIJNDAEL_128, KEY, $sourcestr, MCRYPT_MODE_CBC, IV ) );
}

function aes_decode( $crypttext ) {
    return mcrypt_decrypt( MCRYPT_RIJNDAEL_128, KEY, base64_decode( $crypttext ), MCRYPT_MODE_CBC, IV );
}

$source = '{"token": "asdf"}';
echo aes_encode($source);


echo PHP_EOL;

$source ='mWjO06XV8BwMAJG1uKX+N8ITdkuHyPxRFepTYZNNeQU=';
echo aes_decode($source);
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OpenSSL實現AES加解密

<?php

define( "KEY", "16位" );
define( "IV", "16位" );

function aes_encode( $sourcestr ) {
    $padded_data = $sourcestr . str_repeat(chr(0), 16 - (strlen($sourcestr) % 16));
    return  base64_encode(openssl_encrypt($padded_data, 'aes-128-cbc', KEY, OPENSSL_RAW_DATA|OPENSSL_ZERO_PADDING, IV));
}

function aes_decode( $crypttext ) {
    return trim(openssl_decrypt(base64_decode($crypttext), "aes-128-cbc", KEY, OPENSSL_RAW_DATA|OPENSSL_ZERO_PADDING, IV));
}


$source = '{"token": "asdf"}';
var_dump(aes_encode($source));

$tmp = 'mWjO06XV8BwMAJG1uKX+N8ITdkuHyPxRFepTYZNNeQU=';
var_dump(aes_decode($tmp));
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特殊說明： KEY的長度不同會影響到OpenSSL中aes-x-cbc是選擇128，192還是256。

KEY的長度	aes-x-cbc
16	aes-128-cbc
24	aes-192-cbc
32	aes-256-cbc