OpenSSL PKCS#5/PKCS#7填充 [英] Openssl PKCS#5/PKCS#7 padding
本文介绍了OpenSSL PKCS#5/PKCS#7填充的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想知道openssl如何处理使用AES-128-CBC时可被8字节分割的消息. openssl如何检测没有要删除的填充(PKCS#5/PKCS#7)?尤其是当消息以ASCII码小于或等于8的字符结尾时.
I was wondering how openssl handles a message that is dividable by 8 bytes when using AES-128-CBC. How can openssl detect that there is no padding (PKCS#5/PKCS#7) to be removed? Especially when the message ends in a character with an ASCII code less than or equal to 8.
我希望我的问题清楚. 谢谢
I hope my question is clear. Thanks
推荐答案
好的答案是，即使可以将数据除以块大小，也总是要添加填充.这样，一个8字节的字符串将被8个字节填充(ASCII码为8).
Well the answer is that padding is always added, even if the data can be divided by the block size. Thus a 8 byte string will be padded with 8 bytes (with ASCII code 8).
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