问题描述
我将在PHP(mcrypt_blowfish)项目中使用Blowfish密码.但是我有一个关于使用mcrypt_blowfish的问题，PHP中这种加密模式使用的默认密钥大小是多长时间?libmcrypt支持的其他一些密码具有声明的密钥大小，例如:
I'm going to use Blowfish cipher for my project in PHP (mcrypt_blowfish). But I have a question regarding the used of mcrypt_blowfish, how long is the deafult key size that was used by this mode of encryption in PHP??Some other cipher that was support by libmcrypt had a declared key size, like :
MCRYPT_RIJNDAEL_128 --> 128 bit key
MCRYPT_RIJNDAEL_192 --> 192 bit key
MCRYPT_RC6_128 --> 128 bit key
MCRYPT_RC6_192 --> 192 bit key
但是mcrypt_blowfish的默认密钥大小是多长时间?谢谢...
But how long is the deafult key size for mcrypt_blowfish??Thx before...
推荐答案
似乎使用了可变的密钥大小(似乎没有默认"大小):
It seems to use a variable key size (it seems there isn't a "default" size) :
http://en.wikipedia.org/wiki/Blowfish_(cipher)
河豚的块大小为64位，密钥长度可变，范围从32位到448位"
"Blowfish has a 64-bit block size and a variable key length from 32 bits up to 448 bits"
以下是使用448位密钥的示例: http: //www.php.net/manual/zh-CN/function.mcrypt-encrypt.php#96635
Here is an example using a 448 bits key : http://www.php.net/manual/en/function.mcrypt-encrypt.php#96635
在其他站点上查看，MCRYPT_BLOWFISH_128，MCRYPT_BLOWFISH_192，MCRYPT_BLOWFISH_256和MCRYPT_BLOWFISH_448也应该起作用(未尝试^^)
Looking on other sites, MCRYPT_BLOWFISH_128, MCRYPT_BLOWFISH_192, MCRYPT_BLOWFISH_256 and MCRYPT_BLOWFISH_448 should work too (didn't try ^^)
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