新浪微博登录之前JS密码加密算法之C#版

public class SHA1Util
{
private static readonly bool hexcase = false;
private static readonly string b64pad = "=";
private static readonly int chrsz = 8;

//得到字符串SHA-1值的方法
public static String hex_sha1(String s)
{
s = (s == null) ? "" : s;
return binb2hex(core_sha1(str2binb(s), s.Length * chrsz));
}

public static String b64_hmac_sha1(String key, String data)
{
return binb2b64(core_hmac_sha1(key, data));
}

public static String b64_sha1(String s)
{
s = (s == null) ? "" : s;
return binb2b64(core_sha1(str2binb(s), s.Length * chrsz));
}

private static String binb2b64(int[] binarray)
{
String tab = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/";
String str = "";
binarray = strechbinarray(binarray, binarray.Length * 4);

for (int i = 0; i < binarray.Length * 4; i += 3)
{
int triplet = (((binarray[i >> 2] >> 8 * (3 - i % 4)) & 0xff) << 16)
| (((binarray[i + 1 >> 2] >> 8 * (3 - (i + 1) % 4)) & 0xff) << 8)
| ((binarray[i + 2 >> 2] >> 8 * (3 - (i + 2) % 4)) & 0xff);

for (int j = 0; j < 4; j++)
{
if (i * 8 + j * 6 > binarray.Length * 32)
{
str += b64pad;
}
else
{
str += tab[(triplet >> 6 * (3 - j)) & 0x3f];
}
}
}

return cleanb64str(str);
}

private static String binb2hex(int[] binarray)
{
String hex_tab = hexcase ? "0123456789abcdef" : "0123456789abcdef";
String str = "";

for (int i = 0; i < binarray.Length * 4; i++)
{
char a = (char)hex_tab[(binarray[i >> 2] >> ((3 - i % 4) * 8 + 4)) & 0xf];
char b = (char)hex_tab[(binarray[i >> 2] >> ((3 - i % 4) * 8)) & 0xf];
str += (a.ToString() + b.ToString());
}

return str;
}

private static String binb2str(int[] bin)
{
String str = "";
int mask = (1 << chrsz) - 1;

for (int i = 0; i < bin.Length * 32; i += chrsz)
{
str += (char)(foo(bin[i >> 5], (24 - i % 32)) & mask);
}

return str;
}

private static int bit_rol(int num, int cnt)
{
return (num << cnt) | foo(num, (32 - cnt));
}

private static String cleanb64str(String str)
{
str = (str == null) ? "" : str;
int len = str.Length;

if (len <= 1)
{
return str;
}

char trailchar = str[len - 1];
String trailstr = "";

for (int i = len - 1; i >= 0 && str[i] == trailchar; i--)
{
trailstr += str[i];
}

return str.Substring(0, str.IndexOf(trailstr));
}

private static int[] complete216(int[] oldbin)
{
if (oldbin.Length >= 16)
{
return oldbin;
}

int[] newbin = new int[16 - oldbin.Length];

for (int i = 0; i < newbin.Length; newbin[i] = 0, i++) ;

return concat(oldbin, newbin);
}

private static int[] concat(int[] oldbin, int[] newbin)
{
int[] retval = new int[oldbin.Length + newbin.Length];

for (int i = 0; i < (oldbin.Length + newbin.Length); i++)
{
if (i < oldbin.Length)
{
retval[i] = oldbin[i];
}
else
{
retval[i] = newbin[i - oldbin.Length];
}
}

return retval;
}

private static int[] core_hmac_sha1(String key, String data)
{
key = (key == null) ? "" : key;
data = (data == null) ? "" : data;
int[] bkey = complete216(str2binb(key));

if (bkey.Length > 16)
{
bkey = core_sha1(bkey, key.Length * chrsz);
}

int[] ipad = new int[16];
int[] opad = new int[16];

for (int i = 0; i < 16; ipad[i] = 0, opad[i] = 0, i++) ;

for (int i = 0; i < 16; i++)
{
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5c5c5c5c;
}

int[] hash = core_sha1(concat(ipad, str2binb(data)), 512 + data.Length * chrsz);

return core_sha1(concat(opad, hash), 512 + 160);
}

private static int[] core_sha1(int[] x, int len)
{
int size = (len >> 5);
x = strechbinarray(x, size);
x[len >> 5] |= 0x80 << (24 - len % 32);
size = ((len + 64 >> 9) << 4) + 15;
x = strechbinarray(x, size);
x[((len + 64 >> 9) << 4) + 15] = len;

int[] w = new int[80];
int a = 1732584193;
int b = -271733879;
int c = -1732584194;
int d = 271733878;
int e = -1009589776;

for (int i = 0; i < x.Length; i += 16)
{
int olda = a;
int oldb = b;
int oldc = c;
int oldd = d;
int olde = e;

for (int j = 0; j < 80; j++)
{
if (j < 16)
{
w[j] = x[i + j];
}
else
{
w[j] = rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
}

int t = safe_add(safe_add(rol(a, 5), sha1_ft(j, b, c, d)), safe_add(safe_add(e, w[j]), sha1_kt(j)));

e = d;
d = c;
c = rol(b, 30);
b = a;
a = t;
}

a = safe_add(a, olda);
b = safe_add(b, oldb);
c = safe_add(c, oldc);
d = safe_add(d, oldd);
e = safe_add(e, olde);
}

int[] retval = new int[5];

retval[0] = a;
retval[1] = b;
retval[2] = c;
retval[3] = d;
retval[4] = e;

return retval;
}

private static void dotest()
{
String key = "key";
String data = "data";
Console.WriteLine("hex_sha1(" + data + ")=" + hex_sha1(data));
Console.WriteLine("b64_sha1(" + data + ")=" + b64_sha1(data));
Console.WriteLine("str_sha1(" + data + ")=" + str_sha1(data));
Console.WriteLine("hex_hmac_sha1(" + key + "," + data + ")=" + hex_hmac_sha1(key, data));
Console.WriteLine("b64_hmac_sha1(" + key + "," + data + ")=" + b64_hmac_sha1(key, data));
Console.WriteLine("str_hmac_sha1(" + key + "," + data + ")=" + str_hmac_sha1(key, data));
}

public static String hex_hmac_sha1(String key, String data)
{
return binb2hex(core_hmac_sha1(key, data));
}

private static int rol(int num, int cnt)
{
return (num << cnt) | foo(num, (32 - cnt));
}

private static int safe_add(int x, int y)
{
int lsw = (int)(x & 0xffff) + (int)(y & 0xffff);
int msw = (x >> 16) + (y >> 16) + (lsw >> 16);

return (msw << 16) | (lsw & 0xffff);
}

private static int sha1_ft(int t, int b, int c, int d)
{
if (t < 20)
return (b & c) | ((~b) & d);

if (t < 40)
return b ^ c ^ d;

if (t < 60)
return (b & c) | (b & d) | (c & d);

return b ^ c ^ d;
}

private static int sha1_kt(int t)
{
return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 : (t < 60) ? -1894007588 : -899497514;
}

private static bool sha1_vm_test()
{
return hexcase ? hex_sha1("abc").Equals("a9993e364706816aba3e25717850c26c9cd0d89d") : hex_sha1("abc").Equals("a9993e364706816aba3e25717850c26c9cd0d89d");
}

public static String str_hmac_sha1(String key, String data)
{
return binb2str(core_hmac_sha1(key, data));
}

public static String str_sha1(String s)
{
s = (s == null) ? "" : s;

return binb2str(core_sha1(str2binb(s), s.Length * chrsz));
}

private static int[] str2binb(String str)
{
str = (str == null) ? "" : str;

int[] tmp = new int[str.Length * chrsz];
int mask = (1 << chrsz) - 1;

for (int i = 0; i < str.Length * chrsz; i += chrsz)
{
tmp[i >> 5] |= ((int)(str[i / chrsz]) & mask) << (24 - i % 32);
}

int len = 0;
for (int i = 0; i < tmp.Length && tmp[i] != 0; i++, len++) ;

int[] bin = new int[len];

for (int i = 0; i < len; i++)
{
bin[i] = tmp[i];
}

return bin;
}

private static int[] strechbinarray(int[] oldbin, int size)
{
int currlen = oldbin.Length;

if (currlen >= size + 1)
{
return oldbin;
}

int[] newbin = new int[size + 1];
for (int i = 0; i < size; newbin[i] = 0, i++) ;

for (int i = 0; i < currlen; i++)
{
newbin[i] = oldbin[i];
}

return newbin;
}
public static int foo(int x, int y)
{
int mask = 0x7fffffff;   //Integer.MAX_VALUE
for (int i = 0; i < y; i++)
{
x >>= 1;
x &= mask;
}
return x;
}
}

private static string hex_sha1(string p)
{
return SHA1Util.hex_sha1(p);
}

passwordSha1 = hex_sha1("" + hex_sha1(hex_sha1(regUser.UserPwd)) + servertime + nonce);