public void CreateKeyRoundtripBlob() { const int KeySize = 1024; byte[] blob; using (var gost = GetGostProvider()) { CspKeyContainerInfo containerInfo = gost.CspKeyContainerInfo; Assert.Equal(Gost2012_512ProvType, containerInfo.ProviderType); Assert.Equal(KeySize, gost.KeySize); blob = gost.ExportCspBlob(false); } using (var gost = new Gost3410_2012_512CryptoServiceProvider()) { gost.ImportCspBlob(blob); CspKeyContainerInfo containerInfo = gost.CspKeyContainerInfo; // The provider information is not persisted in the blob Assert.Equal(Gost2012_512ProvType, containerInfo.ProviderType); Assert.Equal(KeySize, gost.KeySize); } }
public AsymmetricAlgorithm DecodePublicKey(Oid oid, byte[] encodedKeyValue, byte[] encodedParameters, ICertificatePal certificatePal) { if (oid.Value == Oids.EcPublicKey && certificatePal != null) { return(DecodeECDsaPublicKey((CertificatePal)certificatePal)); } int algId = Interop.Crypt32.FindOidInfo(CryptOidInfoKeyType.CRYPT_OID_INFO_OID_KEY, oid.Value, OidGroup.PublicKeyAlgorithm, fallBackToAllGroups: true).AlgId; switch (algId) { case AlgId.CALG_RSA_KEYX: case AlgId.CALG_RSA_SIGN: { byte[] keyBlob = DecodeKeyBlob(CryptDecodeObjectStructType.CNG_RSA_PUBLIC_KEY_BLOB, encodedKeyValue); CngKey cngKey = CngKey.Import(keyBlob, CngKeyBlobFormat.GenericPublicBlob); return(new RSACng(cngKey)); } //begin: gost case AlgId.CALG_GOST3410: { var cspObject = new GostKeyExchangeParameters(); cspObject.DecodeParameters(encodedParameters); cspObject.DecodePublicKey(encodedKeyValue, algId); var cspBlobData = GostKeyExchangeParameters.EncodePublicBlob(cspObject, algId); Gost3410CryptoServiceProvider gost_sp = new Gost3410CryptoServiceProvider(); gost_sp.ImportCspBlob(cspBlobData); return(gost_sp); } case AlgId.CALG_GOST3410_2012_256: { var cspObject = new GostKeyExchangeParameters(); cspObject.DecodeParameters(encodedParameters); cspObject.DecodePublicKey(encodedKeyValue, algId); var cspBlobData = GostKeyExchangeParameters.EncodePublicBlob(cspObject, algId); Gost3410_2012_256CryptoServiceProvider gost_sp = new Gost3410_2012_256CryptoServiceProvider(); gost_sp.ImportCspBlob(cspBlobData); return(gost_sp); } case AlgId.CALG_GOST3410_2012_512: { var cspObject = new GostKeyExchangeParameters(); cspObject.DecodeParameters(encodedParameters); cspObject.DecodePublicKey(encodedKeyValue, algId); var cspBlobData = GostKeyExchangeParameters.EncodePublicBlob(cspObject, algId); Gost3410_2012_512CryptoServiceProvider gost_sp = new Gost3410_2012_512CryptoServiceProvider(); gost_sp.ImportCspBlob(cspBlobData); return(gost_sp); } //end: gost case AlgId.CALG_DSS_SIGN: { byte[] keyBlob = ConstructDSSPublicKeyCspBlob(encodedKeyValue, encodedParameters); DSACryptoServiceProvider dsa = new DSACryptoServiceProvider(); dsa.ImportCspBlob(keyBlob); return(dsa); } default: throw new NotSupportedException(SR.NotSupported_KeyAlgorithm); } }