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| <span> 1</span> <span>///</span> <span><summary></span> <span> 2</span> <span>///</span><span> DES加密字符串 </span><span> 3</span> <span>///</span> <span></summary></span> <span> 4</span> <span>///</span> <span><param name="encryptString"></span><span>待加密的字符串</span><span></param></span> <span> 5</span> <span>///</span> <span><param name="encryptKey"></span><span>加密密钥,要求为8位</span><span></param></span> <span> 6</span> <span>///</span> <span><returns></span><span>加密成功返回加密后的字符串,失败返回源串</span><span></returns></span> <span> 7</span> <span>public</span> <span>string</span> EncryptDES(<span>string</span> encryptString, <span>string</span><span> encryptKey) </span><span> 8</span> <span> { </span><span> 9</span> <span>try</span> <span>10</span> <span> { </span><span>11</span> <span>byte</span>[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(<span>0</span>, <span>8</span><span>)); </span><span>12</span> <span>byte</span>[] rgbIV =<span> Keys; </span><span>13</span> <span>byte</span>[] inputByteArray =<span> Encoding.UTF8.GetBytes(encryptString); </span><span>14</span> DESCryptoServiceProvider dCSP = <span>new</span><span> DESCryptoServiceProvider(); </span><span>15</span> MemoryStream mStream = <span>new</span><span> MemoryStream(); </span><span>16</span> CryptoStream cStream = <span>new</span><span> CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write); </span><span>17</span> cStream.Write(inputByteArray, <span>0</span><span>, inputByteArray.Length); </span><span>18</span> <span> cStream.FlushFinalBlock(); </span><span>19</span> <span>return</span><span> Convert.ToBase64String(mStream.ToArray()); </span><span>20</span> <span> } </span><span>21</span> <span>catch</span> <span>22</span> <span> { </span><span>23</span> <span>return</span><span> encryptString; </span><span>24</span> <span> } </span><span>25</span> <span> } </span><span>26</span> <span>27</span> <span>///</span> <span><summary></span> <span>28</span> <span>///</span><span> DES解密字符串 </span><span>29</span> <span>///</span> <span></summary></span> <span>30</span> <span>///</span> <span><param name="decryptString"></span><span>待解密的字符串</span><span></param></span> <span>31</span> <span>///</span> <span><param name="decryptKey"></span><span>解密密钥,要求为8位,和加密密钥相同</span><span></param></span> <span>32</span> <span>///</span> <span><returns></span><span>解密成功返回解密后的字符串,失败返源串</span><span></returns></span> <span>33</span> <span>public</span> <span>string</span> DecryptDES(<span>string</span> decryptString, <span>string</span><span> decryptKey) </span><span>34</span> <span> { </span><span>35</span> <span>try</span> <span>36</span> <span> { </span><span>37</span> <span>byte</span>[] rgbKey = Encoding.UTF8.GetBytes(decryptKey.Substring(<span>0</span>, <span>8</span><span>)); </span><span>38</span> <span>byte</span>[] rgbIV =<span> Keys; </span><span>39</span> <span>byte</span>[] inputByteArray =<span> Convert.FromBase64String(decryptString); </span><span>40</span> DESCryptoServiceProvider DCSP = <span>new</span><span> DESCryptoServiceProvider(); </span><span>41</span> MemoryStream mStream = <span>new</span><span> MemoryStream(); </span><span>42</span> CryptoStream cStream = <span>new</span><span> CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write); </span><span>43</span> cStream.Write(inputByteArray, <span>0</span><span>, inputByteArray.Length); </span><span>44</span> <span> cStream.FlushFinalBlock(); </span><span>45</span> <span>return</span><span> Encoding.UTF8.GetString(mStream.ToArray()); </span><span>46</span> <span> } </span><span>47</span> <span>catch</span> <span>48</span> <span> { </span><span>49</span> <span>return</span><span> decryptString; </span><span>50</span> <span> } </span><span>51</span> }
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