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// license:BSD-3-Clause
// copyright-holders:Vas Crabb
function Crc32Digester()
{
this.crc = 0xffffffff;
}
Crc32Digester.prototype = (function ()
{
var table = new Uint32Array(256);
(function ()
{
for (var i = 0; i < 256; i++)
{
var crc = i;
for (var b = 0; b < 8; b++)
crc = (crc >>> 1) ^ ((crc & 1) ? 0xedb88320 : 0x00000000);
table[i] = crc;
}
})();
return {
digest: function (data, view)
{
for (var i = 0; i < view.length; i++)
this.crc = (this.crc >>> 8) ^ table[(this.crc & 0x000000ff) ^ view[i]];
},
finalise: function ()
{
return this.crc ^ 0xffffffff;
}
};
})();
function Sha1Digester()
{
this.st = new Uint32Array(5);
this.st[0] = 0xc3d2e1f0;
this.st[1] = 0x10325476;
this.st[2] = 0x98badcfe;
this.st[3] = 0xefcdab89;
this.st[4] = 0x67452301;
this.cnt = new Uint32Array(2);
this.cnt[0] = 0;
this.cnt[1] = 0;
this.buf = new DataView(new ArrayBuffer(64));
}
Sha1Digester.prototype = (function ()
{
function rol(x, n)
{
return ((x << n) | (x >>> (32 - n))) & 0xffffffff;
}
function b(data, i)
{
var r = data.getUint32(((i + 13) & 15) << 2, false);
r ^= data.getUint32(((i + 8) & 15) << 2, false);
r ^= data.getUint32(((i + 2) & 15) << 2, false);
r ^= data.getUint32((i & 15) << 2, false);
r = rol(r, 1);
data.setUint32((i & 15) << 2, r, false);
return r;
}
function r0(data, d, i)
{
d[i % 5] = 0xffffffff & (d[i % 5] + ((d[(i + 3) % 5] & (d[(i + 2) % 5] ^ d[(i + 1) % 5])) ^ d[(i + 1) % 5]) + data.getUint32(i << 2, false) + 0x5a827999 + rol(d[(i + 4) % 5], 5));
d[(i + 3) % 5] = rol(d[(i + 3) % 5], 30);
}
function r1(data, d, i)
{
d[i % 5] = 0xffffffff & (d[i % 5] + ((d[(i + 3) % 5] & (d[(i + 2) % 5] ^ d[(i + 1) % 5])) ^ d[(i + 1) % 5])+ b(data, i) + 0x5a827999 + rol(d[(i + 4) % 5], 5));
d[(i + 3) % 5] = rol(d[(i + 3) % 5], 30);
}
function r2(data, d, i)
{
d[i % 5] = 0xffffffff & (d[i % 5] + (d[(i + 3) % 5] ^ d[(i + 2) % 5] ^ d[(i + 1) % 5]) + b(data, i) + 0x6ed9eba1 + rol(d[(i + 4) % 5], 5));
d[(i + 3) % 5] = rol(d[(i + 3) % 5], 30);
}
function r3(data, d, i)
{
d[i % 5] = 0xffffffff & (d[i % 5] + (((d[(i + 3) % 5] | d[(i + 2) % 5]) & d[(i + 1) % 5]) | (d[(i + 3) % 5] & d[(i + 2) % 5])) + b(data, i) + 0x8f1bbcdc + rol(d[(i + 4) % 5], 5));
d[(i + 3) % 5] = rol(d[(i + 3) % 5], 30);
}
function r4(data, d, i)
{
d[i % 5] = 0xffffffff & (d[i % 5] + (d[(i + 3) % 5] ^ d[(i + 2) % 5] ^ d[(i + 1) % 5]) + b(data, i) + 0xca62c1d6 + rol(d[(i + 4) % 5], 5));
d[(i + 3) % 5] = rol(d[(i + 3) % 5], 30);
}
function process(st, data)
{
var d = new Uint32Array(st);
var i = 0;
while (i < 16)
r0(data, d, i++);
while (i < 20)
r1(data, d, i++);
while (i < 40)
r2(data, d, i++);
while (i < 60)
r3(data, d, i++);
while (i < 80)
r4(data, d, i++);
for (i = 0; i < st.length; i++)
st[i] = (st[i] + d[i]) & 0xffffffff;
}
return {
digest: function (data, view)
{
var residual = this.cnt[0];
this.cnt[0] = (this.cnt[0] + (view.length << 3)) & 0xffffffff;
if (residual > this.cnt[0])
this.cnt[1]++;
this.cnt[1] += (view.length >>> 29);
residual = (residual >>> 3) & 63;
var offset = 0;
if ((residual + view.length) >= 64)
{
if (residual > 0)
{
for (offset = 0; (offset + residual) < 64; offset++)
this.buf.setUint8(offset + residual, view[offset]);
process(this.st, this.buf);
residual = 0;
}
for ( ; (view.length - offset) >= 64; offset += 64)
process(this.st, new DataView(data, offset, 64));
}
for ( ; offset < view.length; residual++, offset++)
this.buf.setUint8(residual, view[offset]);
},
finalise : function ()
{
var lenbuf = new ArrayBuffer(8);
var lenview = new DataView(lenbuf);
lenview.setUint32(0, this.cnt[1], false);
lenview.setUint32(4, this.cnt[0], false);
var padbuf = new ArrayBuffer(64 - (63 & ((this.cnt[0] >>> 3) + 8)));
var padview = new Uint8Array(padbuf);
padview[0] = 0x80;
for (var i = 1; i < padview.length; i++)
padview[i] = 0x00;
this.digest(padbuf, padview);
this.digest(lenbuf, new Uint8Array(lenbuf));
var result = new Array(20);
for (var i = 0; i < 20; i++)
result[i] = (this.st[4 - (i >>> 2)] >> ((3 - (i & 3)) << 3)) & 0x000000ff;
return result.map(x => x.toString(16).padStart(2, '0')).join('');
}
};
})();
function StuckBitsDigester(max = 4)
{
this.offset = 0;
this.state = [ ];
for (var i = 0; i <= max; i++)
{
var bytes = 1 << i;
this.state.push({ filled: 0, bits: new Uint8Array(bytes), mask: new Uint8Array(bytes) });
}
}
StuckBitsDigester.prototype = (function ()
{
return {
digest: function (data, view)
{
for (var i = 0; i < view.length; i++)
{
var data = view[i];
for (var j = 0; j < this.state.length; j++)
{
var detail = this.state[j];
var bytes = 1 << j;
var o = this.offset % bytes;
var f = o == (bytes - 1);
if (!detail.filled)
{
detail.bits[o] = data;
detail.mask[o] = 0xff;
if (f)
detail.filled = 1;
}
else
{
detail.mask[o] &= ~(data ^ detail.bits[o]);
detail.bits[o] &= detail.mask[o];
}
if (o == (bytes - 1))
detail.filled += 1;
}
this.offset = (this.offset + 1) % (1 << (this.state.length - 1));
}
},
finalise: function ()
{
var result = [ ];
var lastresult = null;
for (var i = 0; (i < this.state.length) && (this.state[i].filled >= 4); i++)
{
var detail = this.state[i];
var bytes = 1 << i;
for (var j = 0; j < bytes; j++)
{
var mask = detail.mask[j];
if (mask && ((lastresult === null) || (mask != lastresult.mask[j % (1 << (lastresult.mask.length - 1))])))
{
lastresult = { bits: detail.bits, mask: detail.mask };
result.push(lastresult);
break;
}
}
}
return result;
}
};
})();
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