/// <summary>尝试解码令牌，即使失败，也会返回用户信息和有效时间</summary>
/// <param name="token">令牌</param>
/// <param name="user">用户信息</param>
/// <param name="expire">有效时间</param>
/// <returns>解码结果，成功或失败</returns>
public Boolean TryDecode(String token, out String user, out DateTime expire)
{
if (token.IsNullOrEmpty())
{
throw new ArgumentNullException(nameof(token));
}
if (Key.IsNullOrEmpty())
{
throw new ArgumentNullException(nameof(Key));
}
user = null;
expire = DateTime.MinValue;
// Base64拆分数据和签名
var p = token.IndexOf('.');
var data = token.Substring(0, p).ToBase64();
var sig = token.Substring(p + 1).ToBase64();
// 拆分数据和有效期
var str = data.ToStr();
p = str.LastIndexOf(',');
user = str.Substring(0, p);
var secs = str.Substring(p + 1).ToInt();
expire = secs.ToDateTime();
// 验证签名
//if (!DSAHelper.Verify(data, Key, sig)) throw new InvalidOperationException("签名验证失败！");
if (!DSAHelper.Verify(data, Key, sig))
{
return(false);
}
return(true);
}
/// <summary>令牌解码得到用户和有效期</summary>
/// <param name="token">令牌</param>
/// <param name="expire">有效期</param>
/// <returns></returns>
public String Decode(String token, out DateTime expire)
{
if (token.IsNullOrEmpty())
{
throw new ArgumentNullException(nameof(token));
}
if (Key.IsNullOrEmpty())
{
throw new ArgumentNullException(nameof(Key));
}
expire = DateTime.MinValue;
// Base64拆分数据和签名
var p = token.IndexOf('.');
var data = token.Substring(0, p).ToBase64();
var sig = token.Substring(p + 1).ToBase64();
// 验证签名
//if (!DSAHelper.Verify(data, Key, sig)) throw new InvalidOperationException("签名验证失败！");
if (!DSAHelper.Verify(data, Key, sig))
{
return(null);
}
// 拆分数据和有效期
var str = data.ToStr();
p = str.LastIndexOf(',');
var user = str.Substring(0, p);
var secs = str.Substring(p + 1).ToInt();
expire = new DateTime(1970, 1, 1).AddSeconds(secs);
return(user);
}
private void btnDSA2_Click(Object sender, EventArgs e)
{
var buf = GetBytes();
var pass = rtPass.Text;
var v = rtResult.Text;
if (v.Contains("\n\n"))
{
v = v.Substring(null, "\n\n");
}
var sign = GetBytes(v);
var rs = DSAHelper.Verify(buf, pass, sign);
if (rs)
{
MessageBox.Show("验证通过", "DSA数字签名", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
MessageBox.Show("验证失败", "DSA数字签名", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void btnDSA2_Click(Object sender, EventArgs e)
{
var buf = GetBytes();
var pass = rtPass.Buffer.Text;
var v = rtResult.Buffer.Text;
if (v.Contains("\n\n"))
{
v = v.Substring(null, "\n\n");
}
var sign = GetBytes(v);
var rs = DSAHelper.Verify(buf, pass, sign);
if (rs)
{
MessageBox.Show("DSA数字签名验证通过");
}
else
{
MessageBox.Show("DSA数字签名验证失败");
}
}