/// <summary>
/// Sha256加密
/// </summary>
/// <param name="str">要加密的字符串</param>
/// <returns></returns>
static public string sha256(string str)
{
byte[] bytes = CryptoString.stringToBytes(str);
System.Security.Cryptography.SHA256 sha256 = new SHA256CryptoServiceProvider();
byte[] retval = sha256.ComputeHash(bytes);
StringBuilder sb = new StringBuilder();
for (int i = 0; i < retval.Length; i++)
{
sb.Append(retval[i].ToString("x2"));
}
return(sb.ToString());
}
