SHA256从Java到C#的转换

Question

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();

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;
}

（再说一遍，数据是字节数组）

但是，字节不匹配。我是不是漏掉了什么？

（好吧，我当然是，否则它会起作用的，对吧？：S）

-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

当转换为

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

使用SHA256.computeHash()时

Answer 1

你试过ComputeHash方法了吗？

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

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);