72 lines
2.1 KiB
C#
72 lines
2.1 KiB
C#
/*
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* dbMango
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*
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* Copyright 2025 Deutsche Bank AG
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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namespace Rms.Risk.Mango.Services;
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public class SingleUseTokenService : ISingleUseTokenService
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{
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public static TimeSpan TokenValidityInterval = TimeSpan.FromSeconds( 30 );
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private readonly Lock _syncObject = new();
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private readonly List<Tuple<DateTime, string>> _tokens = [];
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public string GetSingleUseToken()
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{
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var guid = Guid.NewGuid().ToString().Replace( "-", "" );
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lock ( _syncObject )
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{
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_tokens.Add( Tuple.Create( DateTime.Now + TokenValidityInterval, guid ) );
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}
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return guid;
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}
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public bool CheckSingleUseToken( string token )
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{
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lock ( _syncObject )
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{
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var toDelete = new List<int>( _tokens.Count );
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var valid = false;
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var now = DateTime.Now;
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for ( var i = 0; i < _tokens.Count; i++ )
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{
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var (expireAt, guid) = _tokens[i];
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if ( expireAt >= now )
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{
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if ( !valid && guid == token )
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{
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valid = true;
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// token is one-off
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toDelete.Add( i );
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}
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}
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else
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{
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// token expired
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toDelete.Add( i );
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}
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}
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for ( var i = toDelete.Count-1; i >= 0; i-- )
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_tokens.RemoveAt( i );
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return valid;
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}
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}
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}
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