public virtual void Encrypt(byte[] data)
{
sm3c3.BlockUpdate(data, 0, data.Length);
for (int i = 0; i < data.Length; i++)
{
if (keyOff == key.Length)
{
NextKey();
}
data[i] ^= key[keyOff++];
}
}
private void Reset()
{
sm3keybase = new SM3Digest(); //实例化一个SM3Digest的对象sm3keybase
sm3c3 = new SM3Digest(); //实例化一个SM3Digest的对象sm3c3
byte[] p;
p = p2.X.ToBigInteger().ToByteArray(); //数据类型转化为比特串。
sm3keybase.BlockUpdate(p, 0, p.Length); //调用密码杂凑BlockUpdate方法
sm3c3.BlockUpdate(p, 0, p.Length); //调用密码杂凑BlockUpdate方法
p = p2.Y.ToBigInteger().ToByteArray(); //数据类型转化为比特串
sm3keybase.BlockUpdate(p, 0, p.Length); //调用密码杂凑BlockUpdate方法
ct = 1;
NextKey();//调用NextKey方法
}
//[STAThread]
#region ²âÊÔ²¢´òÓ¡¸÷¸ö²ÎÊý
public static void Main()
{
byte[] msg1 = Encoding.Default.GetBytes("abc");
byte[] msg2 = Encoding.Default.GetBytes("abcd");
byte[] md = new byte[32];
SM3Digest sm3 = new SM3Digest();
// abcBlockUpdate
sm3.BlockUpdate(msg1, 0, msg1.Length);
sm3.DoFinal(md, 0);
System.String s = new UTF8Encoding().GetString(Hex.Encode(md));
System.Console.Out.WriteLine(s);
// abc*16
for (int i = 0; i < 16; i++)
{
sm3.BlockUpdate(msg2, 0, msg2.Length);
}
sm3.DoFinal(md, 0);
System.String s1 = new UTF8Encoding().GetString(Hex.Encode(md));
System.Console.Out.WriteLine(s1);
// abc + abc*15
SM3Digest sm3_ = new SM3Digest();
sm3_.BlockUpdate(msg2, 0, msg2.Length);
sm3 = new SM3Digest(sm3_);
for (int i = 1; i < 16; i++)
{
sm3.BlockUpdate(msg2, 0, msg2.Length);
}
sm3.DoFinal(md, 0);
System.String s2 = new UTF8Encoding().GetString(Hex.Encode(md));
System.Console.Out.WriteLine(s2);
Console.ReadLine();
/*
* 66c7f0f462eeedd9d1f2d46bdc10e4e24167c4875cf2f7a2297da02b8f4ba8e0
* debe9ff92275b8a138604889c18e5a4d6fdb70e5387e5765293dcba39c0c5732
* debe9ff92275b8a138604889c18e5a4d6fdb70e5387e5765293dcba39c0c5732
*/
}
/*M2签名同样也是需要先摘要原文数据，即先使用SM3密码杂凑算法计算出32byte摘要。SM3需要摘要签名方ID（默认1234567812345678）、
* 曲线参数a,b,Gx,Gy、共钥坐标(x,y)计算出Z值，然后再杂凑原文得出摘要数据。这个地方要注意曲线参数和坐标点都是32byte，
* 在转换为BigInteger大数计算转成字节流时要去掉空补位，否则可能会出现摘要计算不正确的问题：*/
/// <summary>
/// 计算Z值
/// </summary>
/// <param name="userId">签名方ID</param>
/// <param name="userKey">曲线的各个参数</param>
/// <returns></returns>
public virtual byte[] Sm2GetZ(byte[] userId, ECPoint userKey)
{
SM3Digest sm3 = new SM3Digest();
byte[] p;
// userId length
int len = userId.Length * 8;//求userId的长度
sm3.Update((byte)(len >> 8 & 0x00ff));
sm3.Update((byte)(len & 0x00ff));
// userId
sm3.BlockUpdate(userId, 0, userId.Length);
// a,b
p = ecc_a.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
p = ecc_b.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
// gx,gy
p = ecc_gx.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
p = ecc_gy.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
// x,y
p = userKey.X.ToBigInteger().ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
p = userKey.Y.ToBigInteger().ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
// Z
byte[] md = new byte[sm3.GetDigestSize()];
sm3.DoFinal(md, 0);
return(md);
}