C＃ecdsa签名 - 我可以选择哪个密钥规范？ [英] C# ecdsa signature - Which key specification can i choose?

问题描述

我需要在C＃端生成ECDSA签名，并在使用（显然）相对公钥读取并验证Android应用程序上的签名。
好​​吧，要在java中获得ECDSA密钥对（使用充气城堡提供商），代码就像那样

i need to generate a ECDSA signature on C# side, and after reading and verify the signature on android application using (obviously) the relative public key. Well, to get a ECDSA key pair in java (with bouncy castle provider), the code is like that

kpg = KeyPairGenerator.getInstance("ECDSA", "BC");
            ecSpec = new ECGenParameterSpec("secp224k1");
kpg.initialize(ecSpec, new SecureRandom());

字符串secp224k1，是曲线名称。我可以选择secp224k1，secp224r1，secp256k1，secp256r1等等。

The string "secp224k1", is the curve name. And i can choose "secp224k1","secp224r1","secp256k1","secp256r1" and more others.

我的问题是：

1. 上面提到的C＃中的等效曲线名称是什么？


2. 有人能让我举一个例子，说明如何在C＃中，我可以如上面的java代码生成一个keyPair？

提前致谢

推荐答案

我发现了第一个问题：

这是C＃中的等效曲线名称上面提到过？

Which is the equivalent curve name in C# mentioned above?

微软库只支持P-256，P-384和P-521NIST推荐的椭圆曲线ID ，这是等效的命名曲线，分别是SEC 2推荐的椭圆曲线域参数的secp256r1，secp384r1，secp521r1，它们相当于prime256v1，但不是ANSI X9.62 ECDSA主曲线ID中的384和521。
C＃的Bouncy城​​堡库支持更多其他曲线，例如我感兴趣的secp224k1。

The microsoft libraries support only P-256, P-384 and P-521 "NIST-recommended elliptic curve ID", that is the equivalent named curve, rispectively, secp256r1, secp384r1, secp521r1 of "SEC 2 recommended elliptic curve domain parameters" that are the equivalent of prime256v1, but not 384 and 521 in ANSI X9.62 ECDSA prime curve ID. Bouncy castle libraries for C#, support more other curves like the secp224k1 that i was interested.

第二个问题

有人能让我举一个关于如何在C＃中生成像上面的java代码一样的keyPair的例子吗？

Could somebody make me an example about how, in C#, i can generate a keyPair like the above java code?

我发现了一个旧例子这里
它说支持的密钥只有3：192位，239位和256位，但我认为是指库的一些旧版本

i've found an old example here It says that the keys supported are only 3: 192 bit, 239 bit and 256 bit, but i think is referred to some old version of the library

此代码可以演示它

ECKeyPairGenerator gen = new ECKeyPairGenerator("ECDSA");
        SecureRandom secureRandom = new SecureRandom();
        Org.BouncyCastle.Asn1.X9.X9ECParameters ecp = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp224k1");
        ECDomainParameters ecSpec = new ECDomainParameters(ecp.Curve, ecp.G, ecp.N, ecp.H, ecp.GetSeed());
        ECKeyGenerationParameters ecgp = new ECKeyGenerationParameters(ecSpec, secureRandom);
        gen.Init(ecgp);
        AsymmetricCipherKeyPair eckp = gen.GenerateKeyPair();

如果有人想要让它变得更好，我认为这个线程可能对所有人都非常宝贵。我只是C＃的初学者，这个代码不是我的。 ：）

If somebody wants try to make it better, i think that this thread could be very precious for all. Im only a beginner with C# and this code isn't mine. :)

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