GenerateV2DsaBlob()

static unsafe void System.Security.Cryptography.DSAImplementation.DSACng.GenerateV2DsaBlob ( out byte[] blob, DSAParameters parameters, int cbKey, bool includePrivateParameters )

inlinestaticprivate

Definition at line 272 of file DSAImplementation.cs.

        {
            int num = sizeof(global::Interop.BCrypt.BCRYPT_DSA_KEY_BLOB_V2) + ((parameters.Seed == null) ? parameters.Q.Length : parameters.Seed.Length) + parameters.Q.Length + parameters.P.Length + parameters.G.Length + parameters.Y.Length + (includePrivateParameters ? parameters.X.Length : 0);
            blob = new byte[num];
            fixed (byte* ptr = &blob[0])
            {
                global::Interop.BCrypt.BCRYPT_DSA_KEY_BLOB_V2* ptr2 = (global::Interop.BCrypt.BCRYPT_DSA_KEY_BLOB_V2*)ptr;
                ptr2->Magic = (includePrivateParameters ? global::Interop.BCrypt.KeyBlobMagicNumber.BCRYPT_DSA_PRIVATE_MAGIC_V2 : global::Interop.BCrypt.KeyBlobMagicNumber.BCRYPT_DSA_PUBLIC_MAGIC_V2);
                ptr2->cbKey = cbKey;
                ptr2->hashAlgorithm = parameters.Q.Length switch
                {
                    20 => global::Interop.BCrypt.HASHALGORITHM_ENUM.DSA_HASH_ALGORITHM_SHA1, 
                    32 => global::Interop.BCrypt.HASHALGORITHM_ENUM.DSA_HASH_ALGORITHM_SHA256, 
                    64 => global::Interop.BCrypt.HASHALGORITHM_ENUM.DSA_HASH_ALGORITHM_SHA512, 
                    _ => throw new PlatformNotSupportedException(System.SR.Cryptography_InvalidDsaParameters_QRestriction_LargeKey), 
                };
                ptr2->standardVersion = global::Interop.BCrypt.DSAFIPSVERSION_ENUM.DSA_FIPS186_3;
                int offset = sizeof(global::Interop.BCrypt.BCRYPT_DSA_KEY_BLOB_V2) - 4;
                if (parameters.Seed != null)
                {
                    global::Interop.BCrypt.EmitBigEndian(blob, ref offset, parameters.Counter);
                    ptr2->cbSeedLength = parameters.Seed.Length;
                    ptr2->cbGroupSize = parameters.Q.Length;
                    global::Interop.BCrypt.Emit(blob, ref offset, parameters.Seed);
                }
                else
                {
                    global::Interop.BCrypt.EmitByte(blob, ref offset, byte.MaxValue, 4);
                    int count = (ptr2->cbSeedLength = parameters.Q.Length);
                    ptr2->cbGroupSize = parameters.Q.Length;
                    global::Interop.BCrypt.EmitByte(blob, ref offset, byte.MaxValue, count);
                }
                global::Interop.BCrypt.Emit(blob, ref offset, parameters.Q);
                global::Interop.BCrypt.Emit(blob, ref offset, parameters.P);
                global::Interop.BCrypt.Emit(blob, ref offset, parameters.G);
                global::Interop.BCrypt.Emit(blob, ref offset, parameters.Y);
                if (includePrivateParameters)
                {
                    global::Interop.BCrypt.Emit(blob, ref offset, parameters.X);
                }
            }
        }

References System.count, System.Security.Cryptography.DSAParameters.Counter, System.SR.Cryptography_InvalidDsaParameters_QRestriction_LargeKey, System.Security.Cryptography.DSAParameters.G, System.offset, System.Security.Cryptography.DSAParameters.P, System.Security.Cryptography.DSAParameters.Q, System.Security.Cryptography.DSAParameters.Seed, System.Security.Cryptography.DSAParameters.X, and System.Security.Cryptography.DSAParameters.Y.

Referenced by System.Security.Cryptography.DSAImplementation.DSACng.ImportParameters().