什么是＆QUOT;验证＆QUOT;功能RSAKey（AS3Crypto）呢？ [英] What does the "verify" function in RSAKey (AS3Crypto) does?

问题描述

我真的不明白的_verify功能确实在这个类的内容：

I really don't understand what the _verify function does in this class :

<一个href="http://$c$c.google.com/p/as3crypto/source/browse/trunk/as3crypto/src/com/hurlant/crypto/rsa/RSAKey.as" rel="nofollow">http://$c$c.google.com/p/as3crypto/source/browse/trunk/as3crypto/src/com/hurlant/crypto/rsa/RSAKey.as

和尤其是什么装进DST变量。其实我有上的加密数据的确认键至极使用这种方法，我也得到了DST变量公钥...

And especially what does it put into the 'dst' variable. I actually have a "verify key" wich use this method on an encrypted data, and I get the public key in the dst variable...

下面是一个小图，让你更好地理解： http://i.imgur.com/ R8DqT.png

Here is a small diagram, so that you understand better: http://i.imgur.com/R8DqT.png

感谢

PS：我必须做在.net中是相同的，所以如果你知道的东西相当，让我知道它

Ps : I have to do the same in .net,so if you know something equivalent, let me know it

推荐答案

函数_verify（包括下面的参考）

The function _verify (included for reference below)

    public function verify(src:ByteArray, dst:ByteArray, 
length:uint, pad:Function = null):void {
        _decrypt(doPublic, src, dst, length, pad, 0x01);
    }

纵观<一href="http://$c$c.google.com/p/as3crypto/source/browse/trunk/as3crypto/src/com/hurlant/crypto/rsa/RSAKey.as"相对=nofollow>链接您所提供的功能是用于验证RSA签名的数据 - 在将结果复制到DST的ByteArray。

Looking at the link you supplied, the function is used to verify RSA signed data - the result is copied to the dst ByteArray.

分析：

• doPublic =功能参数，各地包装BigInteger.modPowInt（）
• 的src =字节数组签名的数据
• DST =字节数组将举行的核查结果，结果
• 长度 =在SRC字节数组
数据的长度
• 垫 =函数参数，一个包装 pkcs1pad （<$ C C $> _encrypt ）和 pkcs1unpad （ _decrypt ）
• 0×01 = padType - 一个整数值，指定，如果一个固定值（ 0xFF的）用于填充（0×01 ）或伪随机的（0X02） - （仅在 pkcs1pad 实际使用它是由一个名为 _encrypt ）

• doPublic = function parameter, a wrapper around BigInteger.modPowInt()
• src = byte array with signed data
• dst = byte array which will hold the result of with verification result
• length = length of the data in src byte array
• pad = function parameter, a wrapper for pkcs1pad (_encrypt) and pkcs1unpad (_decrypt)
• 0x01 = padType - an integer value specifying if a fixed value (0xff) is used in padding (0x01) or a pseudo-random one (0x02) - (only actually used in pkcs1pad which is called from _encrypt)

在RSA方法，签名数据是通过使用公共密钥解密该签名验证

In the RSA scheme, signed data is verified by decrypting the signature using the public key.

更新：除非你有未涵盖的特殊需求，就是看你为什么要端口的ActionScript 3你贴什么理由。使用C＃<一href="http://msdn.microsoft.com/en-us/library/system.security.cryptography.rsacryptoserviceprovider.aspx"相对=nofollow>的RSACryptoServiceProvider 的被包括在所述框架。需要特别注意的部分互操作与Microsoft加密API（CAPI）在MSDN描述。

Update: Unless you have very specific needs which are not covered, is see no reason why you want to port the ActionScript-3 you posted. Use the c# RSACryptoServiceProvider which is included in the framework. Take special note of the section Interoperation with the Microsoft Cryptographic API (CAPI) in the MSDN description.

解决您的评论对需要的 DST 的内容字节数组以类似的方式向AS3Crypto实现你可以只创建一个包装已签署的数据进行解密针对公众键。看一看<一href="http://msdn.microsoft.com/en-us/library/system.security.cryptography.rsacryptoserviceprovider.importparameters.aspx"相对=nofollow> RSACryptoServiceProvider.ImportParameters（），您可以用它来导入公钥信息功能。既然你没有提供细节如何公钥检索，我不能更具体。此实现例如应该帮助分析密钥文件来创建相应的 RSAParameters 喂到 ImportParameters 方法。

Addressing your comments about needing the content of the dst byte array in a similar manner to the AS3Crypto implementation you could just create a wrapper to decrypt the signed data against the public key. Have a look at RSACryptoServiceProvider.ImportParameters() function which you use to import the public key information. Since you haven't provided details as to how the public key is retrieved I can't be more specific. This implementation example should help with parsing key files to create appropriate RSAParameters to feed to the ImportParameters method.

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