加密解密问题 [英] Encryption decryption problem
本文介绍了加密解密问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
您好，下面是两个函数，一个用于加密，另一个用于解密.当我向EncryptBufW发送英文缓冲区时，它将对其进行加密，而DecryptBufw函数可以对其进行解密.但是当我传递印地语文本时，它将被加密但未被DecryptBuff函数解密.it在out参数中返回".
Hi following are Two functions one is for encryption and another for decryption.When i send English buffer to EncryptBufW then it encrypt it and function DecryptBufw can decrypt it.But when i pass Hindi text then it encrypted but not decrypted by DecryptBuff function.it returns "" in out parameter.
public int EncryptBuffW(string InDec_buffer, out string OutEnc_buffer, out int OutEnc_bSize)
{
OutEnc_buffer = "";
OutEnc_bSize = 0;
string OutData = "";
CryptoStream encStream = null;
MemoryStream fin = null;
MemoryStream fout = new MemoryStream();
try
{
try
{
byte[] data = Encoding.Unicode.GetBytes(InDec_buffer);
//Create the file streams to handle the input and output files.
fin = new MemoryStream(data);
//Create variables to help with read and write.
byte[] bin = new byte[bufLen]; //This is intermediate storage for the encryption.
long rdlen = 0; //This is the total number of bytes written.
long totlen = fin.Length; //This is the total length of the input file.
int len; //This is the number of bytes to be written at a time.
RijndaelManaged rijn = new RijndaelManaged();
rijn.Mode = CipherMode.CBC;
rijn.KeySize = 256;
rijn.BlockSize = 128;
rijn.Padding = PaddingMode.PKCS7;
encStream = new CryptoStream(fout, rijn.CreateEncryptor(cryptoKey, cryptoIV), CryptoStreamMode.Write);
//Read from the input file, then encrypt and write to the output file.
while (true)
{
len = fin.Read(bin, 0, bufLen);
if (len == 0)
break;
encStream.Write(bin, 0, len);
rdlen += len;
}
encStream.FlushFinalBlock();
OutEnc_buffer = Encoding.Unicode.GetString(fout.ToArray());
/* StreamWriter wr = new StreamWriter("c:\\fff.txt", true, Encoding.Unicode);
wr.Write(OutEnc_buffer);
wr.Close();*/
}
catch (Exception e)
{
if (logPermission)
{
SetErrLogFileName("EncryptBuffW:" + " Exception Details: " + e.Message);
}
return 1;
}
finally
{
if (encStream != null)
encStream.Close();
if (fout != null)
fout.Close();
if (fin != null)
fin.Close();
}
}
catch (Exception ee)
{
if (logPermission)
{
SetErrLogFileName("EncryptBuffW:" + " Exception Details: " + ee.Message);
}
return 1;
}
OutEnc_bSize = OutEnc_buffer.Length;
return 0;
}
public int DecryptBuffW(string InEnc_buffer, int InEnc_bSize, out string OutDec_buffer)
{
OutDec_buffer = "";
InEnc_bSize = 0;
string OutData = "";
CryptoStream encStream = null;
MemoryStream fin = null;
MemoryStream fout = new MemoryStream();
try
{
try
{
byte[] data = Encoding.Unicode.GetBytes(InEnc_buffer);
//Create the file streams to handle the input and output files.
fin = new MemoryStream(data);
//Create variables to help with read and write.
byte[] bin = new byte[bufLen]; //This is intermediate storage for the encryption.
long rdlen = 0; //This is the total number of bytes written.
long totlen = fin.Length; //This is the total length of the input file.
int len; //This is the number of bytes to be written at a time.
RijndaelManaged rijn = new RijndaelManaged();
rijn.Mode = CipherMode.CBC;
rijn.KeySize = 256;
rijn.BlockSize = 128;
rijn.Padding = PaddingMode.PKCS7;
encStream = new CryptoStream(fout, rijn.CreateDecryptor(cryptoKey, cryptoIV), CryptoStreamMode.Write);
//Read from the input file, then encrypt and write to the output file.
while (true)
{
len = fin.Read(bin, 0, bufLen);
if (len == 0)
break;
encStream.Write(bin, 0, len);
rdlen += len;
}
encStream.FlushFinalBlock();
OutDec_buffer = Encoding.Unicode.GetString(fout.ToArray());
/*StreamWriter wr = new StreamWriter("c:\\fff.txt",true,Encoding.Default);
wr.Write(OutEnc_buffer);
wr.Close();*/
}
catch (Exception e)
{
if (logPermission)
{
SetErrLogFileName("DecryptBuffW:" + " Exception Details: " + e.Message);
}
return 1;
}
finally
{
if (encStream != null)
encStream.Close();
if (fout != null)
fout.Close();
if (fin != null)
fin.Close();
}
}
catch (Exception ee)
{
if (logPermission)
{
SetErrLogFileName("DecryptBuffW:" + " Exception Details: " + ee.Message);
}
return 1;
}
InEnc_bSize = OutDec_buffer.Length;
return 0;
}
推荐答案
也许CodeProject上的此技巧可以帮助您:
使用TripleDESCryptoServiceProvider类在.NET中进行加密/解密的功能 [ ^ ]
Maybe this tip on CodeProject can help you:
Encryption/Decryption Function in .NET using the TripleDESCryptoServiceProvider Class[^]
您应该在所有函数中使用UTF8Encoding而不是Unicode ！！
You should use UTF8Encoding instead of Unicode in all functions !!
问题已解决..
代替OutEnc_buffer = Encoding.Unicode.GetString(fout.ToArray());
写..
OutEnc_buffer = Convert.ToBase64String(fout.ToArray());
然后再次解密
写byte[] data = Convert.FromBase64String(InEnc_buffer);
代替byte[] data = Encoding.Unicode.GetBytes(InEnc_buffer);
Problem is solved..
istead ofOutEnc_buffer = Encoding.Unicode.GetString(fout.ToArray());
write..
OutEnc_buffer = Convert.ToBase64String(fout.ToArray());
and while decrypting again
writebyte[] data = Convert.FromBase64String(InEnc_buffer);
instead ofbyte[] data = Encoding.Unicode.GetBytes(InEnc_buffer);
这篇关于加密解密问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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