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C# CryptoStream.WriteAsync方法代码示例

本文整理汇总了C#中CryptoStream.WriteAsync方法的典型用法代码示例。如果您正苦于以下问题:C# CryptoStream.WriteAsync方法的具体用法?C# CryptoStream.WriteAsync怎么用?C# CryptoStream.WriteAsync使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在CryptoStream的用法示例。


在下文中一共展示了CryptoStream.WriteAsync方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: Roundtrip

        public static void Roundtrip(int inputBlockSize, int outputBlockSize, bool canTransformMultipleBlocks)
        {
            ICryptoTransform encryptor = new IdentityTransform(inputBlockSize, outputBlockSize, canTransformMultipleBlocks);
            ICryptoTransform decryptor = new IdentityTransform(inputBlockSize, outputBlockSize, canTransformMultipleBlocks);

            var stream = new MemoryStream();
            using (CryptoStream encryptStream = new CryptoStream(stream, encryptor, CryptoStreamMode.Write))
            {
                Assert.True(encryptStream.CanWrite);
                Assert.False(encryptStream.CanRead);
                Assert.False(encryptStream.CanSeek);
                Assert.False(encryptStream.HasFlushedFinalBlock);
                Assert.Throws<NotSupportedException>(() => encryptStream.SetLength(1));
                Assert.Throws<NotSupportedException>(() => encryptStream.Length);
                Assert.Throws<NotSupportedException>(() => encryptStream.Position);
                Assert.Throws<NotSupportedException>(() => encryptStream.Position = 0);
                Assert.Throws<NotSupportedException>(() => encryptStream.Seek(0, SeekOrigin.Begin));
                Assert.Throws<NotSupportedException>(() => encryptStream.Read(new byte[0], 0, 0));
                Assert.Throws<NullReferenceException>(() => encryptStream.Write(null, 0, 0)); // No arg validation on buffer?
                Assert.Throws<ArgumentOutOfRangeException>(() => encryptStream.Write(new byte[0], -1, 0));
                Assert.Throws<ArgumentOutOfRangeException>(() => encryptStream.Write(new byte[0], 0, -1));
                Assert.Throws<ArgumentOutOfRangeException>(() => encryptStream.Write(new byte[0], 0, -1));
                Assert.Throws<ArgumentException>(() => encryptStream.Write(new byte[3], 1, 4));

                byte[] toWrite = Encoding.UTF8.GetBytes(LoremText);

                // Write it all at once
                encryptStream.Write(toWrite, 0, toWrite.Length);
                Assert.False(encryptStream.HasFlushedFinalBlock);

                // Write in chunks
                encryptStream.Write(toWrite, 0, toWrite.Length / 2);
                encryptStream.Write(toWrite, toWrite.Length / 2, toWrite.Length - (toWrite.Length / 2));
                Assert.False(encryptStream.HasFlushedFinalBlock);

                // Write one byte at a time
                for (int i = 0; i < toWrite.Length; i++)
                {
                    encryptStream.WriteByte(toWrite[i]);
                }
                Assert.False(encryptStream.HasFlushedFinalBlock);

                // Write async
                encryptStream.WriteAsync(toWrite, 0, toWrite.Length).GetAwaiter().GetResult();
                Assert.False(encryptStream.HasFlushedFinalBlock);

                // Flush (nops)
                encryptStream.Flush();
                encryptStream.FlushAsync().GetAwaiter().GetResult();

                encryptStream.FlushFinalBlock();
                Assert.Throws<NotSupportedException>(() => encryptStream.FlushFinalBlock());
                Assert.True(encryptStream.HasFlushedFinalBlock);

                Assert.True(stream.Length > 0);
            }

            // Read/decrypt using Read
            stream = new MemoryStream(stream.ToArray()); // CryptoStream.Dispose disposes the stream
            using (CryptoStream decryptStream = new CryptoStream(stream, decryptor, CryptoStreamMode.Read))
            {
                Assert.False(decryptStream.CanWrite);
                Assert.True(decryptStream.CanRead);
                Assert.False(decryptStream.CanSeek);
                Assert.False(decryptStream.HasFlushedFinalBlock);
                Assert.Throws<NotSupportedException>(() => decryptStream.SetLength(1));
                Assert.Throws<NotSupportedException>(() => decryptStream.Length);
                Assert.Throws<NotSupportedException>(() => decryptStream.Position);
                Assert.Throws<NotSupportedException>(() => decryptStream.Position = 0);
                Assert.Throws<NotSupportedException>(() => decryptStream.Seek(0, SeekOrigin.Begin));
                Assert.Throws<NotSupportedException>(() => decryptStream.Write(new byte[0], 0, 0));
                Assert.Throws<NullReferenceException>(() => decryptStream.Read(null, 0, 0)); // No arg validation on buffer?
                Assert.Throws<ArgumentOutOfRangeException>(() => decryptStream.Read(new byte[0], -1, 0));
                Assert.Throws<ArgumentOutOfRangeException>(() => decryptStream.Read(new byte[0], 0, -1));
                Assert.Throws<ArgumentOutOfRangeException>(() => decryptStream.Read(new byte[0], 0, -1));
                Assert.Throws<ArgumentException>(() => decryptStream.Read(new byte[3], 1, 4));

                using (StreamReader reader = new StreamReader(decryptStream))
                {
                    Assert.Equal(
                        LoremText + LoremText + LoremText + LoremText,
                        reader.ReadToEnd());
                }
            }

            // Read/decrypt using ReadToEnd
            stream = new MemoryStream(stream.ToArray()); // CryptoStream.Dispose disposes the stream
            using (CryptoStream decryptStream = new CryptoStream(stream, decryptor, CryptoStreamMode.Read))
            using (StreamReader reader = new StreamReader(decryptStream))
            {
                Assert.Equal(
                    LoremText + LoremText + LoremText + LoremText,
                    reader.ReadToEndAsync().GetAwaiter().GetResult());
            }

            // Read/decrypt using a small buffer to force multiple calls to Read
            stream = new MemoryStream(stream.ToArray()); // CryptoStream.Dispose disposes the stream
            using (CryptoStream decryptStream = new CryptoStream(stream, decryptor, CryptoStreamMode.Read))
            using (StreamReader reader = new StreamReader(decryptStream, Encoding.UTF8, true, bufferSize: 10))
            {
//.........这里部分代码省略.........
开发者ID:hughbe,项目名称:corefx,代码行数:101,代码来源:CryptoStream.cs

示例2: FlushAsync

        public static void FlushAsync()
        {
            ICryptoTransform encryptor = new IdentityTransform(1, 1, true);
            using (MemoryStream output = new MemoryStream())
            using (CryptoStream encryptStream = new CryptoStream(output, encryptor, CryptoStreamMode.Write))
            {
                encryptStream.WriteAsync(new byte[] { 1, 2, 3, 4, 5 }, 0, 5);
                Task waitable = encryptStream.FlushAsync(new Threading.CancellationToken(false));
                Assert.False(waitable.IsCanceled);

                encryptStream.WriteAsync(new byte[] { 1, 2, 3, 4, 5 }, 0, 5);
                waitable = encryptStream.FlushAsync(new Threading.CancellationToken(true));
                Assert.True(waitable.IsCanceled);
            }
        }
开发者ID:hughbe,项目名称:corefx,代码行数:15,代码来源:CryptoStream.cs


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