public void MD5Update(ref MDcontext MD, byte[] inBuf, uint inLen)
{
uint[] _in = new uint[16];
int mdi = (int)((MD.i[0] >> 3) & 0x3F);
uint j;
if ((MD.i[0] + ((uint)inLen << 3)) < MD.i[0])
{
MD.i[1]++;
}
MD.i[0] += ((uint)inLen << 3);
MD.i[1] += ((uint)inLen >> 29);
j = 0;
while (Convert.ToBoolean(inLen--))
{
MD._in[mdi++] = inBuf[j++];
if (mdi == 0x40)
{
for (int i = 0, ii = 0; i < 16; i++, ii += 4)
{
_in[i] = (((uint)MD._in[ii + 3]) << 24) |
(((uint)MD._in[ii + 2]) << 16) |
(((uint)MD._in[ii + 1]) << 8) |
((uint)MD._in[ii]);
}
Transform(ref MD.buf, _in);
mdi = 0;
}
}
}
public void MD5Final(ref MDcontext MD)
{
uint[] _in = new uint[16];
int mdi = (int)((MD.i[0] >> 3) & 0x3F);
uint padLen;
_in[14] = MD.i[0];
_in[15] = MD.i[1];
padLen = (uint)((mdi < 56) ? (56 - mdi) : (120 - mdi));
MD5Update(ref MD, PADDING, padLen);
for (uint i = 0, ii = 0; i < 14; i++, ii += 4)
{
_in[i] = (((uint)MD._in[ii + 3]) << 24) |
(((uint)MD._in[ii + 2]) << 16) |
(((uint)MD._in[ii + 1]) << 8) |
((uint)MD._in[ii]);
}
Transform(ref MD.buf, _in);
for (uint i = 0, ii = 0; i < 4; i++, ii += 4)
{
MD.digest[ii] = (byte)(MD.buf[i] & 0xFF);
MD.digest[ii + 1] = (byte)((MD.buf[i] >> 8) & 0xFF);
MD.digest[ii + 2] = (byte)((MD.buf[i] >> 16) & 0xFF);
MD.digest[ii + 3] = (byte)((MD.buf[i] >> 24) & 0xFF);
}
}
public void MD5Init(ref MDcontext MD)
{
MD.i[0] = MD.i[0] = (uint)0;
MD.buf[0] = (uint)0x67452301;
MD.buf[1] = (uint)0xefcdab89;
MD.buf[2] = (uint)0x98badcfe;
MD.buf[3] = (uint)0x10325476;
}
/// <summary>This method encrypt the given string, using MD5 Algorithm</summary>
/// <param name="s">The string to be encrypted.</param>
/// <returns>The encrypted password.</returns>
public string Encrypt(string s)
{
MDcontext MDp = new MDcontext();
MD5Init(ref MDp);
MD5Update(ref MDp, (new ASCIIEncoding()).GetBytes(s), (uint)s.Length);
MD5Final(ref MDp);
return(MDToString(MDp.digest));
}
/// <summary>This method encrypt the given string with the salt indicated, using MD5 Algorithm</summary>
/// <param name="pwd">The password to be encrypted.</param>
/// <param name="salt"> The salt.</param>
/// <returns>The encrypted password.</returns>
public string Encrypt(string pwd, string salt)
{
string e_pass = "";
MDcontext MDp1 = new MDcontext();
MDcontext MDp2 = new MDcontext();
string magic = "$1$";
if (salt.Length > 19)
{
salt = salt.Substring(0, 19);
}
MD5Init(ref MDp1);
MD5Update(ref MDp1, (new ASCIIEncoding()).GetBytes(pwd), (uint)pwd.Length);
MD5Update(ref MDp1, (new ASCIIEncoding()).GetBytes(magic), (uint)magic.Length);
MD5Update(ref MDp1, (new ASCIIEncoding()).GetBytes(salt), (uint)salt.Length);
MD5Init(ref MDp2);
MD5Update(ref MDp2, (new ASCIIEncoding()).GetBytes(pwd), (uint)pwd.Length);
MD5Update(ref MDp2, (new ASCIIEncoding()).GetBytes(salt), (uint)salt.Length);
MD5Update(ref MDp2, (new ASCIIEncoding()).GetBytes(pwd), (uint)pwd.Length);
MD5Final(ref MDp2);
for (int j = 0; j < 16; j++)
{
MDp1.digest[j] = MDp2.digest[j];
}
for (int pl = pwd.Length; pl > 0; pl -= 16)
{
MD5Update(ref MDp1, MDp1.digest, (uint)((pl > 16) ? 16 : pl));
}
for (int i = 0; i < 16; i++)
{
MDp1.digest[i] = 0x00;
}
for (int i = pwd.Length; Convert.ToBoolean(i); i >>= 1)
{
if (Convert.ToBoolean(i & 1))
{
MD5Update(ref MDp1, MDp1.digest, 1);
}
else
{
MD5Update(ref MDp1, (new ASCIIEncoding()).GetBytes(pwd), 1);
}
}
MD5Final(ref MDp1);
for (int i = 0; i < 1000; i++)
{
MD5Init(ref MDp2);
if (Convert.ToBoolean(i & 1))
{
MD5Update(ref MDp2, (new ASCIIEncoding()).GetBytes(pwd), (uint)pwd.Length);
}
else
{
MD5Update(ref MDp2, MDp1.digest, 16);
}
if (Convert.ToBoolean(i % 3))
{
MD5Update(ref MDp2, (new ASCIIEncoding()).GetBytes(salt), (uint)salt.Length);
}
if (Convert.ToBoolean(i % 7))
{
MD5Update(ref MDp2, (new ASCIIEncoding()).GetBytes(pwd), (uint)pwd.Length);
}
if (Convert.ToBoolean(i & 1))
{
MD5Update(ref MDp2, MDp1.digest, 16);
}
else
{
MD5Update(ref MDp2, (new ASCIIEncoding()).GetBytes(pwd), (uint)pwd.Length);
}
MD5Final(ref MDp2);
for (int j = 0; j < 16; j++)
{
MDp1.digest[j] = MDp2.digest[j];
}
}
e_pass += magic;
e_pass += salt + '$';
ulong l;
l = (ulong)((MDp1.digest[0] << 16) | (MDp1.digest[6] << 8) | MDp1.digest[12]);
_crypt_to64(ref e_pass, l, 4);
l = (ulong)((MDp1.digest[1] << 16) | (MDp1.digest[7] << 8) | MDp1.digest[13]);
_crypt_to64(ref e_pass, l, 4);
l = (ulong)((MDp1.digest[2] << 16) | (MDp1.digest[8] << 8) | MDp1.digest[14]);
_crypt_to64(ref e_pass, l, 4);
l = (ulong)((MDp1.digest[3] << 16) | (MDp1.digest[9] << 8) | MDp1.digest[15]);
_crypt_to64(ref e_pass, l, 4);
l = (ulong)((MDp1.digest[4] << 16) | (MDp1.digest[10] << 8) | MDp1.digest[5]);
_crypt_to64(ref e_pass, l, 4);
l = (ulong)MDp1.digest[11];
_crypt_to64(ref e_pass, l, 2);
return(e_pass);
}
