c# - How to generate EC keypair with Bouncy Castle -


my current project using fips resources of bouncycastle encrypten/decryption signing , on.. keys still generated usual c# bouncy castle. now, because waste want change code, can't find documentation on how this.

what have far:

ecdomainparameters s = new ecdomainparameters(...?)         fipsec.keypairgenerator ecgen = cryptoservicesregistrar.creategenerator(new fipsec.keygenerationparameters(s));

but how specify type of curve, g , n?

thanks in advance if can somehow.

i found examples in bouncycastle unit tests. try downloading code tests: https://www.bouncycastle.org/csharp/download/bccrypto-csharp-1.8.1-src.zip or find appropriate source on web page: https://www.bouncycastle.org/csharp/index.html

then class unit test: ectest

for example have code this:

/**  * key generation test  */ [test] public void testecdsakeygentest() {     securerandom random = new securerandom();      biginteger n = new biginteger("883423532389192164791648750360308884807550341691627752275345424702807307");      fpcurve curve = new fpcurve(         new biginteger("883423532389192164791648750360308885314476597252960362792450860609699839"), // q         new biginteger("7fffffffffffffffffffffff7fffffffffff8000000000007ffffffffffc", 16), //         new biginteger("6b016c3bdcf18941d0d654921475ca71a9db2fb27d1d37796185c2942c0a", 16), // b         n, biginteger.one);      ecdomainparameters parameters = new ecdomainparameters(         curve,         curve.decodepoint(hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // g         n);      eckeypairgenerator pgen = new eckeypairgenerator();     eckeygenerationparameters genparam = new eckeygenerationparameters(         parameters,         random);      pgen.init(genparam);      asymmetriccipherkeypair pair = pgen.generatekeypair();      parameterswithrandom param = new parameterswithrandom(pair.private, random);      ecdsasigner ecdsa = new ecdsasigner();      ecdsa.init(true, param);      byte[] message = new biginteger("968236873715988614170569073515315707566766479517").tobytearray();     biginteger[] sig = ecdsa.generatesignature(message);      ecdsa.init(false, pair.public);      if (!ecdsa.verifysignature(message, sig[0], sig[1]))     {         fail("signature fails");     } }

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