根据MySQL文档，该算法是双SHA1哈希。在检查MySQL源代码时，您会在libmysql /
password.c中找到一个名为make_scrambled_pa​​ssword（）的函数。该函数定义如下：

/*
    MySQL 4.1.1 password hashing: SHA conversion (see RFC 2289, 3174) twice
    applied to the password string, and then produced octet sequence is
    converted to hex string.
    The result of this function is used as return value from PASSWORD() and
    is stored in the database.
  SYNOPSIS
    make_scrambled_password()
    buf       OUT buffer of size 2*SHA1_HASH_SIZE + 2 to store hex string
    password  IN  NULL-terminated password string
*/

void
make_scrambled_password(char *to, const char *password)
{
  SHA1_CONTEXT sha1_context;
  uint8 hash_stage2[SHA1_HASH_SIZE];

  mysql_sha1_reset(&sha1_context);
  /* stage 1: hash password */
  mysql_sha1_input(&sha1_context, (uint8 *) password, (uint) strlen(password));
  mysql_sha1_result(&sha1_context, (uint8 *) to);
  /* stage 2: hash stage1 output */
  mysql_sha1_reset(&sha1_context);
  mysql_sha1_input(&sha1_context, (uint8 *) to, SHA1_HASH_SIZE);
  /* separate buffer is used to pass 'to' in octet2hex */
  mysql_sha1_result(&sha1_context, hash_stage2);
  /* convert hash_stage2 to hex string */
  *to++= PVERSION41_CHAR;
  octet2hex(to, (const char*) hash_stage2, SHA1_HASH_SIZE);
}

使用此方法，您可以创建一个基本上执行相同操作的.NET副本。这是我想出的。当我运行SELECT PASSWORD（’test’）;
针对我的MySQL本地副本，返回的值是：

*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29

根据源代码（再次在password.c中），星号开头表示这是MySQL 4.1之后的加密密码方法。例如，当我在VB.Net中模拟功能时，这就是我想出的：

Public Function GenerateMySQLHash(ByVal strKey As String) As String
    Dim keyArray As Byte() = Encoding.UTF8.GetBytes(strKey)
    Dim enc = New SHA1Managed()
    Dim encodedKey = enc.ComputeHash(enc.ComputeHash(keyArray))
    Dim myBuilder As New StringBuilder(encodedKey.Length)

    For Each b As Byte In encodedKey
        myBuilder.Append(b.ToString("X2"))
    Next

    Return "*" & myBuilder.ToString()
End Function

请记住，SHA1Managed（）在System.Security.Cryptography命名空间中。此方法返回的输出与MySQL中的PASSWORD（）调用相同。希望对您有帮助。

编辑：这是C＃中的相同代码

public string GenerateMySQLHash(string key)
{
    byte[] keyArray = Encoding.UTF8.GetBytes(key);
    SHA1Managed enc = new SHA1Managed();
    byte[] encodedKey = enc.ComputeHash(enc.ComputeHash(keyArray));
    StringBuilder myBuilder = new StringBuilder(encodedKey.Length);

    foreach (byte b in encodedKey)
        myBuilder.Append(b.ToString("X2"));

    return "*" + myBuilder.ToString();
}