// IDisposable methods
/// <include file='doc\HMACSHA1.uex' path='docs/doc[@for="HMACSHA1.Dispose"]/*' />
protected override void Dispose(bool disposing)
{
if (disposing)
{
// We always want to dispose _hash1
if (_hash1 != null)
{
_hash1.Clear();
}
// We always want to dispose _hash2
if (_hash2 != null)
{
_hash2.Clear();
}
// We want to zeroize _rgbInner and _rgbOuter
if (_rgbInner != null)
{
Array.Clear(_rgbInner, 0, _rgbInner.Length);
}
if (_rgbOuter != null)
{
Array.Clear(_rgbOuter, 0, _rgbOuter.Length);
}
}
// call the base class's Dispose
base.Dispose(disposing);
}
}//ComputeCRC32
/// <summary>
/// 获取文件的SHA1
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
public static String GetSHA1(String fileName)
{
String hashSHA1 = String.Empty;
//检查文件是否存在，如果文件存在则进行计算，否则返回空值
if (File.Exists(fileName))
{
using (FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read))
{
//计算文件的SHA1值
System.Security.Cryptography.SHA1 calculator = System.Security.Cryptography.SHA1.Create();
Byte[] buffer = calculator.ComputeHash(fileStream);
calculator.Clear();
//将字节数组转换成十六进制的字符串形式
StringBuilder stringBuilder = new StringBuilder();
for (int bufferIdx = 0; bufferIdx < buffer.Length; bufferIdx++)
{
stringBuilder.Append(buffer[bufferIdx].ToString("x2"));
}
hashSHA1 = stringBuilder.ToString();
}//关闭文件流
}
else
{
Console.Error.WriteLine("{0}文件找不到！", fileName);
}
return hashSHA1;
}//end GetSHA1
/// <summary>
/// 加密
/// </summary>
/// <param name="plainText">明文</param>
/// <param name="encryptKey">加密密钥(加密密钥为null)</param>
/// <returns></returns>
public string Encrypt(string plainText, string encryptKey)
{
//将明文转为字节数组
byte[] arrPlainText = Encoding.UTF8.GetBytes(plainText);
//计算字节数组的哈希值
byte[] arrHash = mCrypto.ComputeHash(arrPlainText);
mCrypto.Clear();
StringBuilder result = new StringBuilder();
for (int i = 0; i < arrHash.Length; i++)
{
result.Append(arrHash[i].ToString("x2"));
}
return(result.ToString());
}
public static string Encrypt_Sha1_16(byte[] bfs)
{
String hashSHA1 = String.Empty;
System.Security.Cryptography.SHA1 calculator = System.Security.Cryptography.SHA1.Create();
Byte[] buffer = calculator.ComputeHash(bfs);
calculator.Clear();
//将字节数组转换成十六进制的字符串形式
StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < buffer.Length; i++)
{
stringBuilder.Append(buffer[i].ToString("x2"));
}
hashSHA1 = stringBuilder.ToString();
return(hashSHA1);
}
public static List <string> ComputeSHA1ByParts(string fileName, int partSize)
{
List <string> hashList = null;
if (System.IO.File.Exists(fileName))
{
using (System.IO.FileStream fs = new System.IO.FileStream(fileName, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.Read))
{
System.Security.Cryptography.SHA1 calculator = System.Security.Cryptography.SHA1.Create();
long nSize = fs.Length;
hashList = new List <string>();
int bufSize = partSize * 1024 * 1024;
byte[] buffer = new byte[bufSize];
byte[] hashBuf;
int nLen = 0;
int nPos = 0;
int nCount = 0;
StringBuilder strBuild = new StringBuilder();
do
{
nLen = fs.Read(buffer, 0, bufSize);
nPos += nLen;
hashBuf = calculator.ComputeHash(buffer);
strBuild.Clear();
foreach (var item in hashBuf)
{
strBuild.Append(item.ToString("x2"));
}
hashList.Add(strBuild.ToString());
nCount++;
} while (nPos != nSize);
calculator.Clear();
//hashSHA1 = stringBuilder.ToString();
}
}
return(hashList);
}
/// <summary>
/// 计算指定文件的SHA1值
/// </summary>
public static string SHA1(string fileName)
{
string hashSHA1 = string.Empty;
if (File.Exists(fileName))
{
using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read))
{
System.Security.Cryptography.SHA1 calculator = System.Security.Cryptography.SHA1.Create();
byte[] buffer = calculator.ComputeHash(fs);
calculator.Clear();
System.Text.StringBuilder stringBuilder = new System.Text.StringBuilder();
for (int i = 0; i < buffer.Length; i++)
{
stringBuilder.Append(buffer[i].ToString("x2"));
}
hashSHA1 = stringBuilder.ToString();
}
}
return(hashSHA1);
}
public static String ComputeSHA1(String fileName)
{
String hashSHA1 = String.Empty;
//检查文件是否存在，如果文件存在则进行计算，否则返回空值
if (System.IO.File.Exists(fileName))
{
using (System.IO.FileStream fs = new System.IO.FileStream(fileName, System.IO.FileMode.Open, System.IO.FileAccess.Read))
{
//计算文件的SHA1值
System.Security.Cryptography.SHA1 calculator = System.Security.Cryptography.SHA1.Create();
Byte[] buffer = calculator.ComputeHash(fs);
calculator.Clear();
//将字节数组转换成十六进制的字符串形式
StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < buffer.Length; i++)
{
stringBuilder.Append(buffer[i].ToString("x2"));
}
hashSHA1 = stringBuilder.ToString();
}//关闭文件流
}
return(hashSHA1);
}
