Note similar support exists for ECDH and RSA keys. NET 5 the PEM encoding is also directly supported, but only for the import: ImportFromPem(). PemWriter.WriteObject((PemObjectGenerator)new PemObject("PRIVATE KEY", privatePkcs8Der)) // SEC1: EC PRIVATE KEY, X.509: PUBLIC KEYĬonsole.WriteLine(stringWriter.ToString()) PemWriter pemWriter = new PemWriter(stringWriter) StringWriter stringWriter = new StringWriter() for PKCS#8 via Org.Bounc圜.Pem.PemWriter): using Org.Bounc圜.Pem Alternatively you can use Bounc圜astle (e.g. The conversion from DER to PEM encoding is trivial: Base64 encode, insert a newline after every 64 characters and add the format specific header and footer. A detour via ExportParameters() is not necessary! The exported keys are DER encoded.Įxample: ECDsa ecdsa = ECDsa.Create(256) īyte privatePkcs8Der = ecdsa.ExportPkcs8PrivateKey() īyte privateSec1Der = ecdsa.ExportECPrivateKey() īyte publicX509Der = ecdsa.ExportSubjectPublicKeyInfo() An ECDSA private key d (an integer) and public key Q (a point) is computed by Q dG, where G is a non-secret domain. NET Core 3.0 the direct export of private ECDSA keys in PKCS#8 format ( ExportPkcs8PrivateKey()) and SEC1 format ( ExportECPrivateKey()) is supported and of public ECDSA keys in X.509 format ( ExportSubjectPublicKeyInfo()). D is simply the raw private key, X and Y are the two coordinates of the raw public key.
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