c# - Creating RSA public/private key pair with Bouncy Castle or .Net RSACryptoServiceProvider -

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so i've messed around bit .net's rsacryptoserviceprovider , bouncy castle able create rsa key pairs , later on x509 certificates.

i'm curious if knows if there's difference between these 2 codeblocks, think same thing, pure bouncy castle version takes longer finish.

.net bouncy castle:

private const int rsakeysize = 4096; public static asymmetriccipherkeypair getkeypairwithdotnet() {    using (rsacryptoserviceprovider rsaprovider = new rsacryptoserviceprovider(rsakeysize))    {       rsaparameters rsakeyinfo = rsaprovider.exportparameters(true);       return dotnetutilities.getrsakeypair(rsakeyinfo);    } }

pure bouncy castle:

private const int rsakeysize = 4096; public static asymmetriccipherkeypair getkeypair() {    cryptoapirandomgenerator randomgenerator = new cryptoapirandomgenerator();    securerandom securerandom = new securerandom(randomgenerator);    var keygenerationparameters = new keygenerationparameters(securerandom, rsakeysize);     var keypairgenerator = new rsakeypairgenerator();    keypairgenerator.init(keygenerationparameters);    return keypairgenerator.generatekeypair(); }


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