/// <summary>
/// SHA-256
/// </summary>
/// <param name="str"></param>
public static string SHA_256(string str)
{
System.Security.Cryptography.SHA256CryptoServiceProvider sha256Csp = new System.Security.Cryptography.SHA256CryptoServiceProvider();
byte[] bytValue = System.Text.Encoding.UTF8.GetBytes(str);
byte[] bytHash = sha256Csp.ComputeHash(bytValue);
sha256Csp.Clear();
string hashStr = "";
for (int counter = 0; counter < bytHash.Count(); counter++)
{
long i = bytHash[counter] / 16;
var tempStr = "";
if (i > 9)
{
tempStr = ((char)(i - 10 + 0x41)).ToString();
}
else
{
tempStr = ((char)(i + 0x30)).ToString();
}
i = bytHash[counter] % 16;
if (i > 9)
{
tempStr += ((char)(i - 10 + 0x41)).ToString();
}
else
{
tempStr += ((char)(i + 0x30)).ToString();
}
hashStr += tempStr;
}
return(hashStr);
}
public string SHA256(string str)
{
var sha256 = new System.Security.Cryptography.SHA256CryptoServiceProvider();
var bs = sha256.ComputeHash(System.Text.Encoding.UTF8.GetBytes(str));
sha256.Clear();
return bs.Aggregate("", (current, b) => current + (b.ToString("x2")));
}
/// <summary>
/// 计算SHA-256码
/// </summary>
/// <param name="word">字符串</param>
/// <param name="toUpper">返回哈希值格式 true：英文大写，false：英文小写</param>
/// <returns></returns>
public string Hash_SHA_256(string word, bool toUpper = true)
{
try
{
System.Security.Cryptography.SHA256CryptoServiceProvider SHA256CSP
= new System.Security.Cryptography.SHA256CryptoServiceProvider();
byte[] bytValue = System.Text.Encoding.UTF8.GetBytes(word);
byte[] bytHash = SHA256CSP.ComputeHash(bytValue);
SHA256CSP.Clear();
//根据计算得到的Hash码翻译为SHA-1码
string sHash = "", sTemp = "";
for (int counter = 0; counter < bytHash.Count(); counter++)
{
long i = bytHash[counter] / 16;
if (i > 9)
{
sTemp = ((char)(i - 10 + 0x41)).ToString();
}
else
{
sTemp = ((char)(i + 0x30)).ToString();
}
i = bytHash[counter] % 16;
if (i > 9)
{
sTemp += ((char)(i - 10 + 0x41)).ToString();
}
else
{
sTemp += ((char)(i + 0x30)).ToString();
}
sHash += sTemp;
}
//根据大小写规则决定返回的字符串
return(toUpper ? sHash : sHash.ToLower());
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
/// <summary>
/// 计算SHA-256码
/// </summary>
/// <param name="word">字符串</param>
/// <param name="toUpper">返回哈希值格式 true：英文大写，false：英文小写</param>
/// <returns></returns>
public static string Hash_SHA_256(string word, bool toUpper = true)
{
try
{
System.Security.Cryptography.SHA256CryptoServiceProvider SHA256CSP
= new System.Security.Cryptography.SHA256CryptoServiceProvider();
byte[] bytValue = System.Text.Encoding.UTF8.GetBytes(word);
byte[] bytHash = SHA256CSP.ComputeHash(bytValue);
SHA256CSP.Clear();
//根据计算得到的Hash码翻译为SHA-1码
string sHash = "", sTemp = "";
for (int counter = 0; counter < bytHash.Count(); counter++)
{
long i = bytHash[counter] / 16;
if (i > 9)
{
sTemp = ((char)(i - 10 + 0x41)).ToString();
}
else
{
sTemp = ((char)(i + 0x30)).ToString();
}
i = bytHash[counter] % 16;
if (i > 9)
{
sTemp += ((char)(i - 10 + 0x41)).ToString();
}
else
{
sTemp += ((char)(i + 0x30)).ToString();
}
sHash += sTemp;
}
//根据大小写规则决定返回的字符串
return toUpper ? sHash : sHash.ToLower();
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
public void Calc_SHA256()
{
System.IO.FileStream fs = new System.IO.FileStream(
filepath,
System.IO.FileMode.Open,
System.IO.FileAccess.Read,
System.IO.FileShare.Read);
System.Security.Cryptography.SHA256CryptoServiceProvider sha256
= new System.Security.Cryptography.SHA256CryptoServiceProvider();
byte[] bs = sha256.ComputeHash(fs);
sha256.Clear();
fs.Close();
SHA256_hash = BitConverter.ToString(bs).ToLower().Replace("-", "");
virustotal_url = "https://www.virustotal.com/ja/file/" + SHA256_hash + "/analysis/";
}