我有一个简单的问题.
我需要将一个sha256校验和方法从java重写为C#

所以我有这个Java鳕鱼可以使用：

Canonicalizer c14Canonicalizer = Canonicalizer.getInstance(Canonicalizer.ALGO_ID_C14N_EXCL_WITH_COMMENTS);
byte[] byteArray = c14Canonicalizer.canonicalizeSubtree(doc);

// At this point, the byteArray in Java and the data in C# matches up.
// That is, after the java bytes are converted to unsigned bytes using
// java.lang.Byte.toUnsignedInt()

MessageDigest md = MessageDigest.getInstance("SHA-256");
md.update(byteArray);
byte byteData[] = md.digest();

(byteArray是,你猜对了,一个字节数组：D)

根据我的发现,update()和digest()方法应该基本上替代相应的HashAlgorithm派生类(在本例中为SHA256)中的TransformBlock()和TransformFinalBlock()方法.

所以我在C#中尝试过类似的东西：

var data = Encoding.UTF8.GetBytes(xmlString);

// At this point, the byteArray in Java and the data in C# matches up.
// That is, after the java bytes are converted to unsigned bytes using
// java.lang.Byte.toUnsignedInt()

using (var sha256 = SHA256.Create())
{
    byte[] shaBytes = new byte[data.Length];
    data.CopyTo(shaBytes, 0);

    sha256.TransformBlock(shaBytes, 0, shaBytes.Length, shaBytes, 0);

    sha256.TransformFinalBlock(shaBytes, 0, shaBytes.Length);
    return sha256.Hash;
}

(再次,数据是一个字节数组)

但是,字节不匹配.我在这里错过了什么吗？

(当然,我是,否则它会起作用,对吧？：S)

UPDATE

为了给你提供更多信息,我在运行你看到的代码之前匹配了Java和C#代码之间的字节.然后他们匹配.但是,C#代码中的字节来自UTF8-Encoded字符串,而Java字节来自c14Canonicalizer.canonicalizeSubtree()方法.

我将更新上面的代码示例以包含它们的起源.

UPDATE

为了它的价值,Java md.digest()方法返回以下字节：

-86,44,95,84,3,50,7,-119,-36,46,39,32,-120,7,10,-86,-101,110,-93,-72,-13 ,-93,-42,111,0,59,-85,-63,-15,-98,-17,-52

转换后转换为

170,44,95,84,3,50,7,137,220,46,39,32,136,7,10,170,155,110,163,184,243,163,214,111,0,59,171,193,241,158,239,204

而C#代码返回

72,108,14,47,15,200,209,10,68,87,17,220,67,226,162,123,69,186,130,167,239,250,180,178,75,101,39,195,32,171,156,178

使用sha256.ComputeHash()时

解决方法:

你尝试过ComputeHash方法吗？

即：

var byteArray = Encoding.ASCII.GetBytes("hello");
var sha = SHA256.Create();
byte[] outputBytes = sha.ComputeHash(byteArray);
var result = BitConverter.ToString(outputBytes).Replace("-", "").ToLower();

编辑

你能试试吗？

XmlDocument doc = new XmlDocument();
doc.LoadXml("xmlString");
XmlDsigExcC14NWithCommentsTransform c14n = new XmlDsigExcC14NWithCommentsTransform();
c14n.LoadInnerXml(doc.ChildNodes);
Stream s = (Stream)c14n.GetOutput(typeof(Stream));
var sha = SHA256.Create();
byte[] outputBytes = sha.ComputeHash(s);