C#DES对较大文件和文件字节数组对象加密解密

编程语言 2018-07-02 15:24:58 阅读次数: 0


  1. using UnityEngine;
  2. using System.Collections;
  3. using System.Security.Cryptography;
  4. using System.IO;
  6. public class Encrypt
  7. {
  9. //DES需要秘钥desKey和desIv向量一起使用加密，它们的要求都是8个数组的字节数组， 如desKey=12345678转成字节数组
  10. private static byte[] desIv = new byte[] { 0xF, 0x56, 0x52, 0xCD, 0xFF, 0x3F, 0x5D, 0x4};
  12. /// <summary>
  13. /// 传入需要加密的文件地址，生成新的加密后的文件
  14. /// </summary>
  15. /// <param name="inFilePath">需要加密的文件路径</param>
  16. /// <param name="outFilePath">生成的加密过的文件</param>
  17. /// <param name="key">加密秘钥</param>
  18. public static void enFile(string inFilePath, string outFilePath, int key)
  19. {
  21. string desKeyStr = key.ToString();
  22. byte[] desKey = System.Text.Encoding.UTF8.GetBytes(desKeyStr.Substring( 0, 8));
  23. FileStream ins = new FileStream(inFilePath, FileMode.Open, FileAccess.Read);
  24. FileStream outs = new FileStream(outFilePath, FileMode.OpenOrCreate, FileAccess.Write);
  25. outs.SetLength( 0);
  27. byte[] buffer = new byte[ 1024* 512];
  28. long readLen = 0;
  29. long totlen = ins.Length;
  30. int len;
  32. DES des = new DESCryptoServiceProvider();
  33. CryptoStream encStream = new CryptoStream(outs, des.CreateEncryptor(desKey, desIv), CryptoStreamMode.Write);
  35. while (readLen < totlen) {
  36. len = ins.Read(buffer, 0, buffer.Length);
  37. encStream.Write(buffer, 0, len);
  38. readLen += len;
  39. }
  40. encStream.Close();
  41. outs.Close();
  42. ins.Close();
  46. }
  48. /// <summary>
  49. /// 传入需要解密的文件地址，生成解密后的文件
  50. /// </summary>
  51. /// <param name="inFilePath">需解密的文件</param>
  52. /// <param name="outFilePath">生成新的解密后的文件</param>
  53. /// <param name="key">秘钥和加密时的一致</param>
  54. public static void deEnFile(string inFilePath, string outFilePath, int key) {
  57. string desKeyStr = key.ToString();
  58. byte[] desKey = System.Text.Encoding.UTF8.GetBytes( desKeyStr.Substring( 0, 8));
  59. FileStream ins = new FileStream(inFilePath, FileMode.Open, FileAccess.Read);
  60. FileStream outs = new FileStream(outFilePath, FileMode.OpenOrCreate, FileAccess.Write);
  61. outs.SetLength( 0);
  63. byte[] buffer = new byte[ 1024* 512];
  64. long readLen = 0;
  65. long totlLen = ins.Length;
  66. int len;
  68. DES des = new DESCryptoServiceProvider();
  69. CryptoStream dencStream = new CryptoStream(outs, des.CreateDecryptor(desKey, desIv), CryptoStreamMode.Write);
  71. while (readLen < totlLen) {
  72. len = ins.Read(buffer, 0, buffer.Length);
  73. dencStream.Write(buffer, 0, len);
  74. readLen += len;
  75. }
  77. dencStream.Close();
  78. outs.Close();
  79. ins.Close();
  82. }
  84. /// <summary>
  85. /// 读取文件解密后的字节数组
  86. /// </summary>
  87. /// <param name="inFilePath">需要读取的加密过的文件</param>
  88. /// <param name="key"></param>
  89. /// <returns>返回文件解密过的字节数组对象</returns>
  90. public static byte[] deEnFileByte(string inFilePath, int key)
  91. {
  93. string desKeyStr = key.ToString();
  94. byte[] desKey = System.Text.Encoding.UTF8.GetBytes(desKeyStr.Substring( 0, 8));
  95. FileStream ins = new FileStream(inFilePath, FileMode.Open, FileAccess.Read);
  97. MemoryStream ms = new MemoryStream(); //内存流，作为流和字节传送的临时媒介
  98. ms.SetLength( 0);
  100. byte[] buffer = new byte[ 1024 * 512];
  101. long readLen = 0;
  102. long totlLen = ins.Length;
  103. int len;
  105. DES des = new DESCryptoServiceProvider();
  106. CryptoStream dencStream = new CryptoStream(ms, des.CreateDecryptor(desKey, desIv), CryptoStreamMode.Write);
  109. while (readLen < totlLen)
  110. {
  111. len = ins.Read(buffer, 0, buffer.Length);
  112. dencStream.Write(buffer, 0, len);
  113. readLen += len;
  114. }
  115. byte[] ret = ms.ToArray();
  117. dencStream.Close();
  118. ms.Close();
  119. ins.Close();
  122. return ret;
  124. }
  126. /// <summary>
  127. /// 对字节数组进行加密
  128. /// </summary>
  129. /// <param name="srcBs">需要加密的字节数组对象</param>
  130. /// <param name="key"></param>
  131. /// <returns>返回加密过的字节数组</returns>
  132. public static byte[] enByteToByte(byte[] srcBs, int key)
  133. {
  136. string desKeyStr = key.ToString();
  137. byte[] desKey = System.Text.Encoding.UTF8.GetBytes(desKeyStr.Substring( 0, 8));
  139. MemoryStream ins = new MemoryStream(srcBs);
  140. MemoryStream outs = new MemoryStream();
  141. outs.SetLength( 0);
  143. byte[] buffer = new byte[ 1024 * 512];
  144. long readLen = 0;
  145. long totlen = ins.Length;
  146. int len;
  148. DES des = new DESCryptoServiceProvider();
  149. CryptoStream encStream = new CryptoStream(outs, des.CreateEncryptor(desKey, desIv), CryptoStreamMode.Write);
  151. while (readLen < totlen)
  152. {
  153. len = ins.Read(buffer, 0, buffer.Length);
  154. encStream.Write(buffer, 0, len);
  155. readLen += len;
  156. }
  157. encStream.Close();
  158. outs.Close();
  159. ins.Close();
  161. return outs.ToArray();
  163. }
  165. /// <summary>
  166. /// 解密字节数组
  167. /// </summary>
  168. /// <param name="srcBs"></param>
  169. /// <param name="key"></param>
  170. /// <returns></returns>
  171. public static byte[] deEnByteToByte(byte[] srcBs, int key)
  172. {
  175. string desKeyStr = key.ToString();
  176. byte[] desKey = System.Text.Encoding.UTF8.GetBytes(desKeyStr.Substring( 0, 8));
  178. MemoryStream ins = new MemoryStream(srcBs);
  179. MemoryStream outs = new MemoryStream();
  180. outs.SetLength( 0);
  182. byte[] buffer = new byte[ 1024 * 512];
  183. long readLen = 0;
  184. long totlen = ins.Length;
  185. int len;
  188. DES des = new DESCryptoServiceProvider();
  189. CryptoStream encStream = new CryptoStream(outs, des.CreateDecryptor(desKey, desIv), CryptoStreamMode.Write);
  191. while (readLen < totlen)
  192. {
  193. len = ins.Read(buffer, 0, buffer.Length);
  194. encStream.Write(buffer, 0, len);
  195. readLen += len;
  196. }
  197. encStream.Close();
  198. outs.Close();
  199. ins.Close();
  202. return outs.ToArray();
  204. }
  206. }

  1. using UnityEngine;
  2. using System.Collections;
  3. using System.Security.Cryptography;
  4. using System.IO;
  6. public class Encrypt
  7. {
  9. //DES需要秘钥desKey和desIv向量一起使用加密，它们的要求都是8个数组的字节数组， 如desKey=12345678转成字节数组
  10. private static byte[] desIv = new byte[] { 0xF, 0x56, 0x52, 0xCD, 0xFF, 0x3F, 0x5D, 0x4};
  12. /// <summary>
  13. /// 传入需要加密的文件地址，生成新的加密后的文件
  14. /// </summary>
  15. /// <param name="inFilePath">需要加密的文件路径</param>
  16. /// <param name="outFilePath">生成的加密过的文件</param>
  17. /// <param name="key">加密秘钥</param>
  18. public static void enFile(string inFilePath, string outFilePath, int key)
  19. {
  21. string desKeyStr = key.ToString();
  22. byte[] desKey = System.Text.Encoding.UTF8.GetBytes(desKeyStr.Substring( 0, 8));
  23. FileStream ins = new FileStream(inFilePath, FileMode.Open, FileAccess.Read);
  24. FileStream outs = new FileStream(outFilePath, FileMode.OpenOrCreate, FileAccess.Write);
  25. outs.SetLength( 0);
  27. byte[] buffer = new byte[ 1024* 512];
  28. long readLen = 0;
  29. long totlen = ins.Length;
  30. int len;
  32. DES des = new DESCryptoServiceProvider();
  33. CryptoStream encStream = new CryptoStream(outs, des.CreateEncryptor(desKey, desIv), CryptoStreamMode.Write);
  35. while (readLen < totlen) {
  36. len = ins.Read(buffer, 0, buffer.Length);
  37. encStream.Write(buffer, 0, len);
  38. readLen += len;
  39. }
  40. encStream.Close();
  41. outs.Close();
  42. ins.Close();
  46. }
  48. /// <summary>
  49. /// 传入需要解密的文件地址，生成解密后的文件
  50. /// </summary>
  51. /// <param name="inFilePath">需解密的文件</param>
  52. /// <param name="outFilePath">生成新的解密后的文件</param>
  53. /// <param name="key">秘钥和加密时的一致</param>
  54. public static void deEnFile(string inFilePath, string outFilePath, int key) {
  57. string desKeyStr = key.ToString();
  58. byte[] desKey = System.Text.Encoding.UTF8.GetBytes( desKeyStr.Substring( 0, 8));
  59. FileStream ins = new FileStream(inFilePath, FileMode.Open, FileAccess.Read);
  60. FileStream outs = new FileStream(outFilePath, FileMode.OpenOrCreate, FileAccess.Write);
  61. outs.SetLength( 0);
  63. byte[] buffer = new byte[ 1024* 512];
  64. long readLen = 0;
  65. long totlLen = ins.Length;
  66. int len;
  68. DES des = new DESCryptoServiceProvider();
  69. CryptoStream dencStream = new CryptoStream(outs, des.CreateDecryptor(desKey, desIv), CryptoStreamMode.Write);
  71. while (readLen < totlLen) {
  72. len = ins.Read(buffer, 0, buffer.Length);
  73. dencStream.Write(buffer, 0, len);
  74. readLen += len;
  75. }
  77. dencStream.Close();
  78. outs.Close();
  79. ins.Close();
  82. }
  84. /// <summary>
  85. /// 读取文件解密后的字节数组
  86. /// </summary>
  87. /// <param name="inFilePath">需要读取的加密过的文件</param>
  88. /// <param name="key"></param>
  89. /// <returns>返回文件解密过的字节数组对象</returns>
  90. public static byte[] deEnFileByte(string inFilePath, int key)
  91. {
  93. string desKeyStr = key.ToString();
  94. byte[] desKey = System.Text.Encoding.UTF8.GetBytes(desKeyStr.Substring( 0, 8));
  95. FileStream ins = new FileStream(inFilePath, FileMode.Open, FileAccess.Read);
  97. MemoryStream ms = new MemoryStream(); //内存流，作为流和字节传送的临时媒介
  98. ms.SetLength( 0);
  100. byte[] buffer = new byte[ 1024 * 512];
  101. long readLen = 0;
  102. long totlLen = ins.Length;
  103. int len;
  105. DES des = new DESCryptoServiceProvider();
  106. CryptoStream dencStream = new CryptoStream(ms, des.CreateDecryptor(desKey, desIv), CryptoStreamMode.Write);
  109. while (readLen < totlLen)
  110. {
  111. len = ins.Read(buffer, 0, buffer.Length);
  112. dencStream.Write(buffer, 0, len);
  113. readLen += len;
  114. }
  115. byte[] ret = ms.ToArray();
  117. dencStream.Close();
  118. ms.Close();
  119. ins.Close();
  122. return ret;
  124. }
  126. /// <summary>
  127. /// 对字节数组进行加密
  128. /// </summary>
  129. /// <param name="srcBs">需要加密的字节数组对象</param>
  130. /// <param name="key"></param>
  131. /// <returns>返回加密过的字节数组</returns>
  132. public static byte[] enByteToByte(byte[] srcBs, int key)
  133. {
  136. string desKeyStr = key.ToString();
  137. byte[] desKey = System.Text.Encoding.UTF8.GetBytes(desKeyStr.Substring( 0, 8));
  139. MemoryStream ins = new MemoryStream(srcBs);
  140. MemoryStream outs = new MemoryStream();
  141. outs.SetLength( 0);
  143. byte[] buffer = new byte[ 1024 * 512];
  144. long readLen = 0;
  145. long totlen = ins.Length;
  146. int len;
  148. DES des = new DESCryptoServiceProvider();
  149. CryptoStream encStream = new CryptoStream(outs, des.CreateEncryptor(desKey, desIv), CryptoStreamMode.Write);
  151. while (readLen < totlen)
  152. {
  153. len = ins.Read(buffer, 0, buffer.Length);
  154. encStream.Write(buffer, 0, len);
  155. readLen += len;
  156. }
  157. encStream.Close();
  158. outs.Close();
  159. ins.Close();
  161. return outs.ToArray();
  163. }
  165. /// <summary>
  166. /// 解密字节数组
  167. /// </summary>
  168. /// <param name="srcBs"></param>
  169. /// <param name="key"></param>
  170. /// <returns></returns>
  171. public static byte[] deEnByteToByte(byte[] srcBs, int key)
  172. {
  175. string desKeyStr = key.ToString();
  176. byte[] desKey = System.Text.Encoding.UTF8.GetBytes(desKeyStr.Substring( 0, 8));
  178. MemoryStream ins = new MemoryStream(srcBs);
  179. MemoryStream outs = new MemoryStream();
  180. outs.SetLength( 0);
  182. byte[] buffer = new byte[ 1024 * 512];
  183. long readLen = 0;
  184. long totlen = ins.Length;
  185. int len;
  188. DES des = new DESCryptoServiceProvider();
  189. CryptoStream encStream = new CryptoStream(outs, des.CreateDecryptor(desKey, desIv), CryptoStreamMode.Write);
  191. while (readLen < totlen)
  192. {
  193. len = ins.Read(buffer, 0, buffer.Length);
  194. encStream.Write(buffer, 0, len);
  195. readLen += len;
  196. }
  197. encStream.Close();
  198. outs.Close();
  199. ins.Close();
  202. return outs.ToArray();
  204. }
  206. }

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