c# - 将零字节添加到字节数组的最简单方法是什么？

Question

我正在将 byte[] 转换为 BigInteger，我想确保它的结果是正数。 The docs say :

To prevent positive values from being misinterpreted as negative values, you can add a zero-byte value to the end of the array.

但它没有具体说明如何。那么，我该怎么做呢？

---

发现这是最简单的:

public static BigInteger UnsignedBigInt(byte[] bytes)
{
    if ((bytes[bytes.Length - 1] & 0x80) != 0) Array.Resize(ref bytes, bytes.Length + 1);
    return new BigInteger(bytes);
}

Thanks dtb

Answer 1

试试这个:

byte[] bytes = ...

if ((bytes[bytes.Length - 1] & 0x80) != 0)
{
    Array.Resize<byte>(ref bytes, bytes.Length + 1);
}

BigInteger result = new BigInteger(bytes);