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mcrypt_generic 与 mcrypt_crypt

发布于 2024-08-31 13:07:39 字数 58 浏览 9 评论 0原文

有谁知道 PHP 加密时 mcrypt_generic 和 mcrypt_encrypt 之间的区别？

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终弃我 2024-09-07 13:07:39

mcrypt_encrypt() 结合了多种方法的功能，而 mcrypt_generic() 必须在其他 mcrypt_* 调用的特定序列中调用。如果您需要较低级别 API 的灵活性，则可以使用 mcrypt_generic()，而 mcrypt_encrypt() 则充当较高级别的实用程序。

PHP 文档中的这个示例很好地比较了两种 API 方法。它指的是 mcrypt_ecb()，但出于比较的目的，您可以认为它与 mcrypt_encrypt() 类似。

来自 http://us.php.net/manual/en/mcrypt.examples。 php

$key = "this is a secret key";
$input = "Let us meet at 9 o'clock at the secret place.";

$encrypted_data = mcrypt_ecb (MCRYPT_3DES, $key, $input, MCRYPT_ENCRYPT);

或者：

$key = "this is a secret key";
$input = "Let us meet at 9 o'clock at the secret place.";

$td = mcrypt_module_open('tripledes', '', 'ecb', '');
$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
mcrypt_generic_init($td, $key, $iv);
$encrypted_data = mcrypt_generic($td, $input);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);

mcrypt_encrypt() combines the functionality of several methods, whereas mcrypt_generic() must be called within a certain sequence of other mcrypt_* calls. You would use mcrypt_generic() if you needed the flexibility of the lower-level API, whereas mcrypt_encrypt() acts as a higher-level utility.

This example in the PHP documentation shows a good comparison between the two API approaches. It refers to mcrypt_ecb(), but for the purposes of this comparison you can consider it to be similar to mcrypt_encrypt().

From http://us.php.net/manual/en/mcrypt.examples.php

$key = "this is a secret key";
$input = "Let us meet at 9 o'clock at the secret place.";

$encrypted_data = mcrypt_ecb (MCRYPT_3DES, $key, $input, MCRYPT_ENCRYPT);

Or:

$key = "this is a secret key";
$input = "Let us meet at 9 o'clock at the secret place.";

$td = mcrypt_module_open('tripledes', '', 'ecb', '');
$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
mcrypt_generic_init($td, $key, $iv);
$encrypted_data = mcrypt_generic($td, $input);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);

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