加密代码:
FileStream fsIn = File.Open(this.File1.Value, FileMode.Open, FileAccess.Read);
string newfile = this.File1.Value.Substring(0,this.File1.Value.LastIndexOf("\\"))+"\\testEncode.txt";
SymmetricAlgorithm symm = new RijndaelManaged();
ICryptoTransform transform= symm.CreateEncryptor();
CryptoStream cstream = new CryptoStream(fsIn, transform, CryptoStreamMode.Read); StreamReader sr = new StreamReader(cstream);
this.TxtContent.Text = sr.ReadToEnd();
fsIn.Close();
解密代码
string str= this.TxtContent.Text;
byte[] bstr = System.Text.Encoding.Default.GetBytes(str);
MemoryStream ms = new MemoryStream(bstr,0,bstr.Length,true);
SymmetricAlgorithm symm = new RijndaelManaged();
ICryptoTransform transform = symm.CreateEncryptor();
CryptoStream cstream = new CryptoStream(ms, transform, CryptoStreamMode.Read); StreamReader sr = new StreamReader(cstream);
this.TxtContent.Text = sr.ReadToEnd();
ms.Close();为什么加密后再解密,数据和之前不一样了呢?
FileStream fsIn = File.Open(this.File1.Value, FileMode.Open, FileAccess.Read);
string newfile = this.File1.Value.Substring(0,this.File1.Value.LastIndexOf("\\"))+"\\testEncode.txt";
SymmetricAlgorithm symm = new RijndaelManaged();
ICryptoTransform transform= symm.CreateEncryptor();
CryptoStream cstream = new CryptoStream(fsIn, transform, CryptoStreamMode.Read); StreamReader sr = new StreamReader(cstream);
this.TxtContent.Text = sr.ReadToEnd();
fsIn.Close();
解密代码
string str= this.TxtContent.Text;
byte[] bstr = System.Text.Encoding.Default.GetBytes(str);
MemoryStream ms = new MemoryStream(bstr,0,bstr.Length,true);
SymmetricAlgorithm symm = new RijndaelManaged();
ICryptoTransform transform = symm.CreateEncryptor();
CryptoStream cstream = new CryptoStream(ms, transform, CryptoStreamMode.Read); StreamReader sr = new StreamReader(cstream);
this.TxtContent.Text = sr.ReadToEnd();
ms.Close();为什么加密后再解密,数据和之前不一样了呢?
byte[] bstr = System.Text.Encoding.Default.GetBytes(str);
MemoryStream ms = new MemoryStream(bstr,0,bstr.Length,true);
SymmetricAlgorithm symm = new RijndaelManaged();
ICryptoTransform transform = symm.CreateDecryptor();
CryptoStream cstream = new CryptoStream(ms, transform, CryptoStreamMode.Read); StreamReader sr = new StreamReader(cstream);
this.TxtContent.Text = sr.ReadToEnd();
ms.Close();但是现在却提示解密的字符串长度无效?
using System.Security.Cryptography ;
using System.Text;
using System.IO;
namespace SEDO
{
/// <summary>
/// SEDO 的摘要说明。
/// SEDO 实现的是用一个封装了4种对称加密方法(Des,Rc2,Rijndael,TripleDes)的组件
///
/// 注意事项:
/// 1:TripleDes和Rijndael加密/解密对象使用16或者24位byte的Key
/// 2:Rijndael只能使用16位的初始化向量IV
/// 3:Des和Rc2均使用8位Byte的Key和IV
/// 4:对需要加密/解密的数据流采用何种方法进行编码/解码,由调用组件的用户自己决定
/// 5:密钥和初始化向量IV由使用者自己定义
/// 程序员: 王海波 2003-05-19 [email protected]
/// </summary> //定义加密类型的枚举
public enum EncryptionAlgorithm {Des = 1, Rc2, Rijndael, TripleDes};
//定义加密类
internal class EncryptTransformer
{
private EncryptionAlgorithm algorithmID;
private byte[] initVec;
private byte[] encKey; internal EncryptTransformer(EncryptionAlgorithm algId)
{
//Save the algorithm being used.
algorithmID = algId;
} internal ICryptoTransform GetCryptoServiceProvider(byte[] bytesKey)
{
//当数据密钥Key或者初始化向量IV为空的时候,将使用加密对象自动产生的密钥Key或者初始化向量IV
switch (algorithmID)
{
case EncryptionAlgorithm.Des:
{
DES des = new DESCryptoServiceProvider();
des.Mode = CipherMode.CBC; // See if a key was provided
if (null == bytesKey)
{
encKey = des.Key;
}
else
{
des.Key = bytesKey;
encKey = des.Key;
}
// See if the client provided an initialization vector
if (null == initVec)
{ // Have the algorithm create one
initVec = des.IV;
}
else
{ //No, give it to the algorithm
des.IV = initVec;
}
return des.CreateEncryptor();
}
case EncryptionAlgorithm.TripleDes:
{
TripleDES des3 = new TripleDESCryptoServiceProvider();
des3.Mode = CipherMode.CBC;
// See if a key was provided
if (null == bytesKey)
{
encKey = des3.Key;
}
else
{
des3.Key = bytesKey;
encKey = des3.Key;
}
// See if the client provided an IV
if (null == initVec)
{ //Yes, have the alg create one
initVec = des3.IV;
}
else
{ //No, give it to the alg.
des3.IV = initVec;
}
return des3.CreateEncryptor();
}
case EncryptionAlgorithm.Rc2:
{
RC2 rc2 = new RC2CryptoServiceProvider();
rc2.Mode = CipherMode.CBC;
// Test to see if a key was provided
if (null == bytesKey)
{
encKey = rc2.Key;
}
else
{
rc2.Key = bytesKey;
encKey = rc2.Key;
}
// See if the client provided an IV
if (null == initVec)
{ //Yes, have the alg create one
initVec = rc2.IV;
}
else
{ //No, give it to the alg.
rc2.IV = initVec;
}
return rc2.CreateEncryptor();
}
case EncryptionAlgorithm.Rijndael:
{
Rijndael rijndael = new RijndaelManaged();
rijndael.Mode = CipherMode.CBC;
// Test to see if a key was provided
if(null == bytesKey)
{
encKey = rijndael.Key;
}
else
{
rijndael.Key = bytesKey;
encKey = rijndael.Key;
}
// See if the client provided an IV
if(null == initVec)
{ //Yes, have the alg create one
initVec = rijndael.IV;
}
else
{ //No, give it to the alg.
rijndael.IV = initVec;
}
return rijndael.CreateEncryptor();
}
default:
{
throw new CryptographicException("Algorithm ID '" +
algorithmID +
"' not supported.");
}
}
}
internal byte[] IV
{
get{return initVec;}
set{initVec = value;}
}
//加密的密钥
internal byte[] Key
{
get{return encKey;}
set{encKey = value;}
} } //定义解密类
internal class DecryptTransformer
{
private EncryptionAlgorithm algorithmID;
private byte[] initVec;
private byte[] encKey; internal DecryptTransformer(EncryptionAlgorithm deCryptId)
{
algorithmID = deCryptId;
} //加密的偏移向量
internal byte[] IV
{
get{return initVec;}
set{initVec = value;}
} //加密的密钥
internal byte[] Key
{
get{return encKey;}
set{encKey = value;}
} internal ICryptoTransform GetCryptoServiceProvider(byte[] bytesKey)
{
//当数据密钥Key或者初始化向量IV为空的时候,将使用加密对象自动产生的密钥Key或者初始化向量IV
switch (algorithmID)
{
case EncryptionAlgorithm.Des:
{
DES des = new DESCryptoServiceProvider();
des.Mode = CipherMode.CBC;
des.Key = bytesKey;
des.IV = initVec;
return des.CreateDecryptor();
}
case EncryptionAlgorithm.TripleDes:
{
TripleDES des3 = new TripleDESCryptoServiceProvider();
des3.Mode = CipherMode.CBC;
return des3.CreateDecryptor(bytesKey, initVec);
}
case EncryptionAlgorithm.Rc2:
{
RC2 rc2 = new RC2CryptoServiceProvider();
rc2.Mode = CipherMode.CBC;
return rc2.CreateDecryptor(bytesKey, initVec);
}
case EncryptionAlgorithm.Rijndael:
{
Rijndael rijndael = new RijndaelManaged();
rijndael.Mode = CipherMode.CBC;
return rijndael.CreateDecryptor(bytesKey, initVec);
}
default:
{
throw new CryptographicException("Algorithm ID '" +
algorithmID +
"' not supported.");
}
}
} //end GetCryptoServiceProvider } //定义加密者类
public class Encryptor
{
private EncryptTransformer transformer;
private byte[] initVec;
private byte[] encKey; public Encryptor(EncryptionAlgorithm algId)
{
transformer = new EncryptTransformer(algId);
} public byte[] Encrypt(byte[] bytesData, byte[] bytesKey,byte[] bytesIV)
{
//设置流对象用来保存加密数据字节流.
MemoryStream memStreamEncryptedData = new MemoryStream(); transformer.IV=bytesIV;
transformer.Key=bytesKey; ICryptoTransform transform = transformer.GetCryptoServiceProvider(bytesKey);
CryptoStream encStream = new CryptoStream(memStreamEncryptedData,transform,CryptoStreamMode.Write); try
{
//将加密数据写进流对象
encStream.Write(bytesData, 0, bytesData.Length);
}
catch(Exception ex)
{
throw new Exception("在数据加密的时候出现错误!错误提示: \n" + ex.Message);
} //设置加密的Key和初始向量IV属性
encKey = transformer.Key;
initVec = transformer.IV; encStream.FlushFinalBlock();
encStream.Close(); //Send the data back.
return memStreamEncryptedData.ToArray();
} public byte[] IV
{
get{return initVec;}
set{initVec = value;}
} public byte[] Key
{
get{return encKey;}
set{encKey = value;}
} }
//定义解密者类
public class Decryptor
{
private DecryptTransformer transformer;
private byte[] initVec;
private byte[] encKey; public Decryptor(EncryptionAlgorithm algId)
{
transformer = new DecryptTransformer(algId);
} public byte[] Decrypt(byte[] bytesData, byte[] bytesKey,byte[] bytesIV)
{
//设置流对象用来保存解密数据字节流.
MemoryStream memStreamDecryptedData = new MemoryStream(); //Pass in the initialization vector.
transformer.IV = bytesIV;
transformer.Key = bytesKey; ICryptoTransform transform = transformer.GetCryptoServiceProvider(bytesKey);
CryptoStream decStream = new CryptoStream(memStreamDecryptedData,transform, CryptoStreamMode.Write); try
{
decStream.Write(bytesData, 0, bytesData.Length);
}
catch(Exception ex)
{
throw new Exception("在数据解密的时候出现错误!错误提示: \n" + ex.Message);
}
decStream.FlushFinalBlock();
decStream.Close();
// 返回解密数据.
return memStreamDecryptedData.ToArray();
} public byte[] IV
{
get{return initVec;}
set{initVec = value;}
} public byte[] Key
{
get{return encKey;}
set{encKey = value;}
} } //类描述:文件加密/解密类
public class SecurityFile
{
private DecryptTransformer Dec_Transformer; //解密转换器
private EncryptTransformer Enc_Transformer; //加密转换器
private byte[] initVec;
private byte[] encKey; public SecurityFile(EncryptionAlgorithm algId)
{
Dec_Transformer = new DecryptTransformer(algId);
Enc_Transformer = new EncryptTransformer(algId);
} //加密的偏移向量
internal byte[] IV
{
get{return initVec;}
set{initVec = value;}
}
//加密的密钥
internal byte[] Key
{
get{return encKey;}
set{encKey = value;}
}
public void EncryptFile(string inFileName, string outFileName, byte[] bytesKey, byte[] bytesIV)
{
try
{
FileStream fin = new FileStream(inFileName, FileMode.Open, FileAccess.Read);
FileStream fout = new FileStream(outFileName, FileMode.OpenOrCreate, FileAccess.Write);
fout.SetLength(0); //Create variables to help with read and write.
byte[] bin = new byte[100]; //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. Enc_Transformer.IV=bytesIV;
Enc_Transformer.Key=bytesKey; ICryptoTransform transform = Enc_Transformer.GetCryptoServiceProvider(bytesKey);
CryptoStream encStream = new CryptoStream(fout, transform, CryptoStreamMode.Write); //Read from the input file, then encrypt and write to the output file.
while(rdlen < totlen)
{
len = fin.Read(bin, 0, 100);
encStream.Write(bin, 0, len);
rdlen = rdlen + len;
} encStream.Close();
fout.Close();
fin.Close();
}
catch(Exception ex)
{
throw new Exception("在文件加密的时候出现错误!错误提示: \n" + ex.Message);
}
} //功能描述:解密文件
public void DecryptFile(string inFileName, string outFileName, byte[] bytesKey, byte[] bytesIV)
{
try
{
FileStream fin = new FileStream(inFileName, FileMode.Open, FileAccess.Read);
FileStream fout = new FileStream(outFileName, FileMode.OpenOrCreate, FileAccess.Write);
fout.SetLength(0); //Create variables to help with read and write.
byte[] bin = new byte[100]; //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. Dec_Transformer.IV=bytesIV;
Dec_Transformer.Key=bytesKey; ICryptoTransform transform = Dec_Transformer.GetCryptoServiceProvider(bytesKey);
CryptoStream encStream = new CryptoStream(fout, transform, CryptoStreamMode.Write); //Read from the input file, then encrypt and write to the output file.
while(rdlen < totlen)
{
len = fin.Read(bin, 0, 100);
encStream.Write(bin, 0, len);
rdlen = rdlen + len;
} encStream.Close();
fout.Close();
fin.Close();
}
catch(Exception ex)
{
throw new Exception("在文件加密的时候出现错误!错误提示: \n" + ex.Message);
}
} } }
string str = this.TextBox1.Text;
byte[] bstr = System.Text.Encoding.Default.GetBytes(str); MemoryStream ms = new MemoryStream(bstr, 0, bstr.Length, true);
SymmetricAlgorithm symm = new RijndaelManaged();
ICryptoTransform transform = symm.CreateDecryptor();
CryptoStream cstream = new CryptoStream(ms, transform, CryptoStreamMode.Read);
StreamReader sr = new StreamReader(cstream); try
{
this.TextBox2.Text = sr.ReadToEnd();
}
catch (Exception)
{
}
ms.Close();
}
有错误,在this.TextBox2.Text = sr.ReadToEnd();