public string Encode(OwnerToken token)
{
var ownerTypeBys = NetBitConverter.GetBytes(token.OwnerType);
var ownerIdBys = NetBitConverter.GetBytes(token.OwnerId);
var expireTimeBys = GetBytes(token.ExpireTime);
var lstLen = 1 + ownerTypeBys.Length + ownerIdBys.Length + expireTimeBys.Length;
var mdatLst = new List <byte>(lstLen);
mdatLst.Add(CurrentVersion);
mdatLst.AddRange(ownerTypeBys);
mdatLst.AddRange(ownerIdBys);
mdatLst.AddRange(expireTimeBys);
var mdatBys = mdatLst.ToArray();
//签名
var signBys = ArrayUtil.Addition(_appSecretBytes, mdatBys);
var hashBys = Sha1(signBys);
//编码成字符串
var encBys = ArrayUtil.Addition(hashBys, mdatBys);
return(_urlDataCodec.Encode(encBys));
}
public string Encode(FileToken token)
{
var pseudoIdBys = NetBitConverter.GetBytes(token.PseudoId);
var fileIdBys = NetBitConverter.GetBytes(token.FileId);
var ownerIdBys = NetBitConverter.GetBytes(token.FileOwnerId);
var mimeBys = NetBitConverter.GetBytes(token.MimeId);
var expireTimeBys = GetBytes(token.ExpireTime);
var fileCreateTimeBys = GetBytes(token.FileCreateTime);
var lstLen = 1 + pseudoIdBys.Length + fileIdBys.Length + ownerIdBys.Length + mimeBys.Length + expireTimeBys.Length + fileCreateTimeBys.Length;
var mdatLst = new List <byte>(lstLen);
mdatLst.Add(CurrentVersion);
mdatLst.AddRange(pseudoIdBys);
mdatLst.AddRange(fileIdBys);
mdatLst.AddRange(ownerIdBys);
mdatLst.AddRange(mimeBys);
mdatLst.AddRange(expireTimeBys);
mdatLst.AddRange(fileCreateTimeBys);
var mdatBys = mdatLst.ToArray();
//签名
var signBys = ArrayUtil.Addition(_appSecretBytes, mdatBys);
var hashBys = Md5(signBys);
//编码成字符串
var encBys = ArrayUtil.Addition(hashBys, mdatBys);
return(_urlDataCodec.Encode(encBys));
}
public FileToken Decode(string tokenStr)
{
var encBys = _urlDataCodec.Decode(tokenStr);
//校验签名
var hashLen = 16;
var mdatBys = new byte[encBys.Length - hashLen];
Array.Copy(encBys, hashLen, mdatBys, 0, mdatBys.Length);
var signBys = ArrayUtil.Addition(_appSecretBytes, mdatBys);
var hashBys = Md5(signBys);
if (!ArrayUtil.Equals(hashBys, 0, encBys, 0, hashLen))
{
throw new InvalidDataException("bad sign");
}
if (mdatBys[0] != CurrentVersion)
{
throw new NotSupportedException("bad token version");
}
//解析成对象
var index = 1; //忽略版本
var pseudoId = NetBitConverter.ToUInt32(mdatBys, index);
index += 4;
var fileId = NetBitConverter.ToInt32(mdatBys, index);
index += 4;
var ownerId = NetBitConverter.ToInt32(mdatBys, index);
index += 4;
var mimeId = NetBitConverter.ToUInt32(mdatBys, index);
index += 4;
var expireTime = ToDateTime(mdatBys, index);
index += sizeof(long);
var fileCreateTime = ToDateTime(mdatBys, index);
return(new FileToken
{
PseudoId = pseudoId,
FileId = fileId,
FileOwnerId = ownerId,
MimeId = mimeId,
ExpireTime = expireTime,
FileCreateTime = fileCreateTime
});
}
public OwnerToken Decode(string tokenStr)
{
var encBys = _urlDataCodec.Decode(tokenStr);
//校验签名
var hashLen = 20;
var mdatBys = new byte[encBys.Length - hashLen];
Array.Copy(encBys, hashLen, mdatBys, 0, mdatBys.Length);
var signBys = ArrayUtil.Addition(_appSecretBytes, mdatBys);
var hashBys = Sha1(signBys);
if (!ArrayUtil.Equals(hashBys, 0, encBys, 0, hashLen))
{
throw new InvalidDataException("bad sign");
}
if (mdatBys[0] != CurrentVersion)
{
throw new NotSupportedException("bad token version");
}
//解析成对象
var index = 1; //忽略版本
var ownerType = NetBitConverter.ToInt32(mdatBys, index);
index += 4;
var ownerId = NetBitConverter.ToInt32(mdatBys, index);
index += 4;
var expireTime = ToDateTime(mdatBys, index);
return(new OwnerToken
{
OwnerType = ownerType,
OwnerId = ownerId,
ExpireTime = expireTime
});
}
