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gostDigest.js
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gostDigest.js
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/**
* @file GOST R 34.11-94 / GOST R 34.11-12 implementation
* @version 1.76
* @copyright 2014-2016, Rudolf Nickolaev. All rights reserved.
*/
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Converted to JavaScript from source https://www.streebog.net/
* Copyright (c) 2013, Alexey Degtyarev.
* All rights reserved.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
(function (root, factory) {
/*
* Module imports and exports
*
*/ // <editor-fold defaultstate="collapsed">
if (typeof define === 'function' && define.amd) {
define(['gostRandom', 'gostCipher'], factory);
} else if (typeof exports === 'object') {
module.exports = factory(require('gostRandom'), require('gostCipher'));
} else {
root.GostDigest = factory(root.GostRandom, root.GostCipher);
}
// </editor-fold>
}(this, function (GostRandom, GostCipher) {
/*
* GOST R 34.11
* Common methods
*
*/ // <editor-fold defaultstate="collapsed">
var root = this;
var rootCrypto = root.crypto || root.msCrypto;
var DataError = root.DataError || Error,
NotSupportedError = root.NotSupportedError || Error;
// Copy len values from s[sOfs] to d[dOfs]
function arraycopy(s, sOfs, d, dOfs, len) {
for (var i = 0; i < len; i++)
d[dOfs + i] = s[sOfs + i];
}
// Swap bytes in buffer
function swap(s) {
var src = new Uint8Array(s),
dst = new Uint8Array(src.length);
for (var i = 0, n = src.length; i < n; i++)
dst[n - i - 1] = src[i];
return dst.buffer;
}
// Convert BASE64 string to Uint8Array
// for decompression of constants and precalc values
function b64decode(s) {
// s = s.replace(/[^A-Za-z0-9\+\/]/g, '');
var n = s.length,
k = n * 3 + 1 >> 2, r = new Uint8Array(k);
for (var m3, m4, u24 = 0, j = 0, i = 0; i < n; i++) {
m4 = i & 3;
var c = s.charCodeAt(i);
c = c > 64 && c < 91 ?
c - 65 : c > 96 && c < 123 ?
c - 71 : c > 47 && c < 58 ?
c + 4 : c === 43 ?
62 : c === 47 ?
63 : 0;
u24 |= c << 18 - 6 * m4;
if (m4 === 3 || n - i === 1) {
for (m3 = 0; m3 < 3 && j < k; m3++, j++) {
r[j] = u24 >>> (16 >>> m3 & 24) & 255;
}
u24 = 0;
}
}
return r.buffer;
}
// Random seed
function getSeed(length) {
GostRandom = GostRandom || root.GostRandom;
var randomSource = GostRandom ? new (GostRandom || root.GostRandom) : rootCrypto;
if (randomSource.getRandomValues) {
var d = new Uint8Array(Math.ceil(length / 8));
randomSource.getRandomValues(d);
return d;
} else
throw new NotSupportedError('Random generator not found');
}
// Check buffer
function buffer(d) {
if (d instanceof ArrayBuffer)
return d;
else if (d && d.buffer && d.buffer instanceof ArrayBuffer)
return d.byteOffset === 0 && d.byteLength === d.buffer.byteLength ?
d.buffer : new Uint8Array(new Uint8Array(d, d.byteOffset, d.byteLength)).buffer;
else
throw new DataError('ArrayBuffer or ArrayBufferView required');
} // </editor-fold>
/**
* Algorithm name GOST R 34.11 or GOST R 34.11-12<br><br>
*
* http://tools.ietf.org/html/rfc6986
*
* The digest method returns digest data in according to GOST R 4311-2012.<br>
* Size of digest also defines in algorithm name.
* <ul>
* <li>GOST R 34.11-256-12 - 256 bits digest</li>
* <li>GOST R 34.11-512-12 - 512 bits digest</li>
* </ul>
*
* @memberOf GostDigest
* @method digest
* @instance
* @param {(ArrayBuffer|TypedArray)} data Data
* @returns {ArrayBuffer} Digest of data
*/
var digest2012 = (function () // <editor-fold defaultstate="collapsed">
{
// Constants
var buffer0 = new Int32Array(16); // [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
var buffer512 = new Int32Array(16); // [512, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
buffer512[0] = 512;
// Constant C
var C = (function (s) {
var h = new Int32Array(b64decode(s)),
r = new Array(12);
for (var i = 0; i < 12; i++)
r[i] = new Int32Array(h.buffer, i * 64, 16);
return r;
})(
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'2ahRWTXCrDYvxKXRK43RaZAGm5LLK4n0msTbTTtEtIke3jaccfi3TkFBbgwCqucDp8mTTUJbH5vbWiODUURhcmAqH8uS3DgOVJwHppqKK3uxzrLbC0QKgIQJDeC3Vdk8JEKJJRs6fTreXxbs2JpMlJsiMRZUWo837ZxFmPvHtHTDtjsV0fqYNvRSdjswbB56SzNprwJn558DYTMbiuH/H9t4iv8c50GJ8/PkskjlKjhSbwWApt6+qxst84HNpMprXdhvwEpZot6Ybkd9Hc2678q5SOrvcR2KeWaEFCGAASBhB6vru2v62JT+WmPNxgIw+4nI79CezXsg1xvxSpK8SJkbstnVF/T6UijhiKqkHeeGzJEYne+AXZufITDUEiD4dx3fvDI8pM16sUkEsIAT0roxFvFn5443');
// Precalc Ax
var Ax = (function (s) {
return new Int32Array(b64decode(s));
})(
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'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'); //==
// Variables
var sigma, N, h;
// 64bit tools
function get8(x, i) {
return (x[i >> 2] >> ((i & 3) << 3)) & 0xff;
}
// 512bit tools
function add512(x, y) {
var CF = 0, w0, w1;
for (var i = 0; i < 16; i++) {
w0 = (x[i] & 0xffff) + (y[i] & 0xffff) + (CF || 0);
w1 = (x[i] >>> 16) + (y[i] >>> 16) + (w0 >>> 16);
x[i] = (w0 & 0xffff) | (w1 << 16);
CF = (w1 >>> 16);
}
}
function get512(d) {
return new Int32Array(d.buffer, d.byteOffset, 16);
}
function copy512(r, d) {
for (var i = 0; i < 16; i++)
r[i] = d[i];
}
function new512() {
return new Int32Array(16);
}
// Core private algorithms
function xor512(x, y) {
for (var i = 0; i < 16; i++)
x[i] = x[i] ^ y[i];
}
var r = new512();
function XLPS(x, y) {
copy512(r, x);
xor512(r, y);
for (var i = 0; i < 8; i++) {
var z0, z1, k = get8(r, i) << 1;
z0 = Ax[k];
z1 = Ax[k + 1];
for (var j = 1; j < 8; j++) {
k = (j << 9) + (get8(r, (j << 3) + i) << 1);
z0 = z0 ^ Ax[k];
z1 = z1 ^ Ax[k + 1];
}
x[i << 1] = z0;
x[(i << 1) + 1] = z1;
}
}
var data = new512(), Ki = new512();
function g(h, N, m)
{
var i;
copy512(data, h);
XLPS(data, N);
/* Starting E() */
copy512(Ki, data);
XLPS(data, m);
for (i = 0; i < 11; i++) {
XLPS(Ki, C[i]);
XLPS(data, Ki);
}
XLPS(Ki, C[11]);
xor512(data, Ki);
/* E() done */
xor512(h, data);
xor512(h, m);
}
// Stages
function stage2(d) {
var m = get512(d);
g(h, N, m);
add512(N, buffer512);
add512(sigma, m);
}
function stage3(d) {
var n = d.length;
if (n > 63)
return;
var b0 = new Int32Array(16);
b0[0] = n << 3;
var b = new Uint8Array(64);
for (var i = 0; i < n; i++)
b[i] = d[i];
b[n] = 0x01;
var m = get512(b), m0 = get512(b0);
g(h, N, m);
add512(N, m0);
add512(sigma, m);
g(h, buffer0, N);
g(h, buffer0, sigma);
}
return function (data) {
// Cleanup
sigma = new512();
N = new512();
// Initial vector
h = new512();
for (var i = 0; i < 16; i++)
if (this.bitLength === 256)
h[i] = 0x01010101;
// Make data
var d = new Uint8Array(buffer(data));
var n = d.length;
var r = n % 64, q = (n - r) / 64;
for (var i = 0; i < q; i++)
stage2.call(this, new Uint8Array(d.buffer, i * 64, 64));
stage3.call(this, new Uint8Array(d.buffer, q * 64, r));
var digest;
if (this.bitLength === 256) {
digest = new Int32Array(8);
for (var i = 0; i < 8; i++)
digest[i] = h[8 + i];
} else {
digest = new Int32Array(16);
for (var i = 0; i < 16; i++)
digest[i] = h[i];
}
// Swap hash for SignalCom
if (this.procreator === 'SC' || this.procreator === 'VN')
return swap(digest.buffer);
else
return digest.buffer;
};
} // </editor-fold>
)();
/**
* Algorithm name GOST R 34.11-94<br><br>
*
* http://tools.ietf.org/html/rfc5831
*
* The digest method returns digest data in according to GOST R 34.11-94.
* @memberOf GostDigest
* @method digest
* @instance
* @param {(ArrayBuffer|TypedArray)} data Data
* @returns {ArrayBuffer} Digest of data
*/
var digest94 = (function () // <editor-fold defaultstate="collapsed">
{
var C, H, M, Sum;
// (i + 1 + 4(k - 1)) = 8i + k i = 0-3, k = 1-8
function P(d) {
var K = new Uint8Array(32);
for (var k = 0; k < 8; k++) {
K[4 * k] = d[k];
K[1 + 4 * k] = d[ 8 + k];
K[2 + 4 * k] = d[16 + k];
K[3 + 4 * k] = d[24 + k];
}
return K;
}
//A (x) = (x0 ^ x1) || x3 || x2 || x1
function A(d)
{
var a = new Uint8Array(8);
for (var j = 0; j < 8; j++)
{
a[j] = (d[j] ^ d[j + 8]);
}
arraycopy(d, 8, d, 0, 24);
arraycopy(a, 0, d, 24, 8);
return d;
}
// (in:) n16||..||n1 ==> (out:) n1^n2^n3^n4^n13^n16||n16||..||n2
function fw(d) {
var wS = new Uint16Array(d.buffer, 0, 16);
var wS15 = wS[0] ^ wS[1] ^ wS[2] ^ wS[3] ^ wS[12] ^ wS[15];
arraycopy(wS, 1, wS, 0, 15);
wS[15] = wS15;
}
//Encrypt function, ECB mode
function encrypt(key, s, sOff, d, dOff) {
var t = new Uint8Array(8);
arraycopy(d, dOff, t, 0, 8);
var r = new Uint8Array(this.cipher.encrypt(key, t));
arraycopy(r, 0, s, sOff, 8);
}
// block processing
function process(d, dOff) {
var S = new Uint8Array(32), U = new Uint8Array(32),
V = new Uint8Array(32), W = new Uint8Array(32);
arraycopy(d, dOff, M, 0, 32);
//key step 1
// H = h3 || h2 || h1 || h0
// S = s3 || s2 || s1 || s0
arraycopy(H, 0, U, 0, 32);
arraycopy(M, 0, V, 0, 32);
for (var j = 0; j < 32; j++)
{
W[j] = (U[j] ^ V[j]);
}
// Encrypt GOST 28147-ECB
encrypt.call(this, P(W), S, 0, H, 0); // s0 = EK0 [h0]
//keys step 2,3,4
for (var i = 1; i < 4; i++) {
var tmpA = A(U);
for (var j = 0; j < 32; j++) {
U[j] = (tmpA[j] ^ C[i][j]);
}
V = A(A(V));
for (var j = 0; j < 32; j++) {
W[j] = (U[j] ^ V[j]);
}
// Encrypt GOST 28147-ECB
encrypt.call(this, P(W), S, i * 8, H, i * 8); // si = EKi [hi]
}
// x(M, H) = y61(H^y(M^y12(S)))
for (var n = 0; n < 12; n++) {
fw(S);
}
for (var n = 0; n < 32; n++) {
S[n] = (S[n] ^ M[n]);
}
fw(S);
for (var n = 0; n < 32; n++) {
S[n] = (H[n] ^ S[n]);
}
for (var n = 0; n < 61; n++) {
fw(S);
}
arraycopy(S, 0, H, 0, H.length);
}
// 256 bitsblock modul -> (Sum + a mod (2^256))
function summing(d)
{
var carry = 0;
for (var i = 0; i < Sum.length; i++)
{
var sum = (Sum[i] & 0xff) + (d[i] & 0xff) + carry;
Sum[i] = sum;
carry = sum >>> 8;
}
}
// reset the chaining variables to the IV values.
var C2 = new Uint8Array([
0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF,
0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0xFF, 0x00,
0x00, 0xFF, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0xFF,
0xFF, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF
]);
return function (data) {
// Reset buffers
H = new Uint8Array(32);
M = new Uint8Array(32);
Sum = new Uint8Array(32);
// Reset IV value
C = new Array(4);
for (var i = 0; i < 4; i++)
C[i] = new Uint8Array(32);
arraycopy(C2, 0, C[2], 0, C2.length);
// Make data
var d = new Uint8Array(buffer(data));
var n = d.length;
var r = n % 32, q = (n - r) / 32;
// Proccess full blocks
for (var i = 0; i < q; i++) {
var b = new Uint8Array(d.buffer, i * 32, 32);
summing.call(this, b); // calc sum M
process.call(this, b, 0);
}
// load d the remadder with padding zero;
if (r > 0) {
var b = new Uint8Array(d.buffer, q * 32),
c = new Uint8Array(32);
arraycopy(b, 0, c, 0, r);
summing.call(this, c); // calc sum M
process.call(this, c, 0);
}
// get length into L (byteCount * 8 = bitCount) in little endian.
var L = new Uint8Array(32), n8 = n * 8, k = 0;
while (n8 > 0) {
L[k++] = n8 & 0xff;
n8 = Math.floor(n8 / 256);
}
process.call(this, L, 0);
process.call(this, Sum, 0);
var h = H.buffer;
// Swap hash for SignalCom
if (this.procreator === 'SC')
h = swap(h);
return h;
};
} // </editor-fold>
)();
/**
* Algorithm name SHA-1<br><br>
*
* https://tools.ietf.org/html/rfc3174
*
* The digest method returns digest data in according to SHA-1.<br>
*
* @memberOf GostDigest
* @method digest
* @instance
* @param {(ArrayBuffer|TypedArray)} data Data
* @returns {ArrayBuffer} Digest of data
*/
var digestSHA1 = (function () // <editor-fold defaultstate="collapsed">
{
// Create a buffer for each 80 word block.
var state, block = new Uint32Array(80);
function common(a, e, w, k, f) {
return (f + e + w + k + ((a << 5) | (a >>> 27))) >>> 0;
}
function f1(a, b, c, d, e, w) {
return common(a, e, w, 0x5A827999, d ^ (b & (c ^ d)));
}
function f2(a, b, c, d, e, w) {
return common(a, e, w, 0x6ED9EBA1, b ^ c ^ d);
}
function f3(a, b, c, d, e, w) {
return common(a, e, w, 0x8F1BBCDC, (b & c) | (d & (b | c)));
}
function f4(a, b, c, d, e, w) {
return common(a, e, w, 0xCA62C1D6, b ^ c ^ d);
}
function cycle(state, block) {
var a = state[0],
b = state[1],
c = state[2],
d = state[3],
e = state[4];
// Partially unroll loops so we don't have to shift variables.
var fn = f1;
for (var i = 0; i < 80; i += 5) {
if (i === 20) {
fn = f2;
}
else if (i === 40) {
fn = f3;
}
else if (i === 60) {
fn = f4;
}
e = fn(a, b, c, d, e, block[i]);
b = ((b << 30) | (b >>> 2)) >>> 0;
d = fn(e, a, b, c, d, block[i + 1]);
a = ((a << 30) | (a >>> 2)) >>> 0;
c = fn(d, e, a, b, c, block[i + 2]);
e = ((e << 30) | (e >>> 2)) >>> 0;
b = fn(c, d, e, a, b, block[i + 3]);
d = ((d << 30) | (d >>> 2)) >>> 0;
a = fn(b, c, d, e, a, block[i + 4]);
c = ((c << 30) | (c >>> 2)) >>> 0;
}
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
state[4] += e;
}
// Swap bytes for 32bits word
function swap32(b) {
return ((b & 0xff) << 24)
| ((b & 0xff00) << 8)
| ((b >> 8) & 0xff00)
| ((b >> 24) & 0xff);
}
// input is a Uint8Array bitstream of the data
return function (data) {
var d = new Uint8Array(buffer(data)), dlen = d.length;
// Pad the input string length.
var len = dlen + 9;
if (len % 64) {
len += 64 - (len % 64);
}
state = new Uint32Array(5);
state[0] = 0x67452301;
state[1] = 0xefcdab89;
state[2] = 0x98badcfe;
state[3] = 0x10325476;
state[4] = 0xc3d2e1f0;
for (var ofs = 0; ofs < len; ofs += 64) {
// Copy input to block and write padding as needed
for (var i = 0; i < 64; i++) {
var b = 0,
o = ofs + i;
if (o < dlen) {
b = d[o];
}
else if (o === dlen) {
b = 0x80;
}
else {
// Write original bit length as a 64bit big-endian integer to the end.
var x = len - o - 1;
if (x >= 0 && x < 4) {
b = (dlen << 3 >>> (x * 8)) & 0xff;
}
}
// Interpret the input bytes as big-endian per the spec
if (i % 4 === 0) {
block[i >> 2] = b << 24;
}
else {
block[i >> 2] |= b << ((3 - (i % 4)) * 8);
}
}
// Extend the block
for (var i = 16; i < 80; i++) {
var w = block[i - 3] ^ block[i - 8] ^ block[i - 14] ^ block[i - 16];
block[i] = (w << 1) | (w >>> 31);
}
cycle(state, block);
}
// Swap the bytes around since they are big endian internally
for (var i = 0; i < 5; i++)
state[i] = swap32(state[i]);
return state.buffer;
};
} // </editor-fold>
)();
/**
* Algorithm name GOST R 34.11-HMAC<br><br>
*
* HMAC with the specified hash function.
* @memberOf GostDigest
* @method sign
* @instance
* @param {ArrayBuffer} key The key for HMAC.
* @param {Hash} data Data
*/
function signHMAC(key, data) // <editor-fold defaultstate="collapsed">
{
// GOST R 34.11-94 - B=32b, L=32b
// GOST R 34.11-256 - B=64b, L=32b
// GOST R 34.11-512 - B=64b, L=64b
var b = (this.digest === digest94) ? 32 : 64,
l = this.bitLength / 8,
k = buffer(key),
d = buffer(data), k0;
if (k.byteLength === b)
k0 = new Uint8Array(k);
else {
var k0 = new Uint8Array(b);
if (k.byteLength > b) {
k0.set(new Uint8Array(this.digest(k)));
} else {
k0.set(new Uint8Array(k));
}
}
var s0 = new Uint8Array(b + d.byteLength),
s1 = new Uint8Array(b + l);
for (var i = 0; i < b; i++) {
s0[i] = k0[i] ^ 0x36;
s1[i] = k0[i] ^ 0x5C;
}
s0.set(new Uint8Array(d), b);
s1.set(new Uint8Array(this.digest(s0)), b);
return this.digest(s1);
} // </editor-fold>
/**
* Algorithm name GOST R 34.11-HMAC<br><br>
*
* Verify HMAC based on GOST R 34.11 hash
*
* @memberOf GostDigest
* @method verify
* @instance
* @param {(ArrayBuffer|TypedArray)} key Key which used for HMAC generation
* @param {(ArrayBuffer|TypedArray)} signature generated HMAC
* @param {(ArrayBuffer|TypedArray)} data Data
* @returns {boolean} HMAC verified = true
*/
function verifyHMAC(key, signature, data) // <editor-fold defaultstate="collapsed">
{
var hmac = new Uint8Array(this.sign(key, data)),
test = new Uint8Array(signature);
if (hmac.length !== test.length)
return false;
for (var i = 0, n = hmac.length; i < n; i++)
if (hmac[i] !== test[i])
return false;
return true;
} // </editor-fold>
/**
* Algorithm name GOST R 34.11-KDF<br><br>
*
* Simple generate key 256/512 bit random seed for derivation algorithms
*
* @memberOf GostDigest
* @method generateKey
* @instance
* @returns {ArrayBuffer} Generated key
*/
function generateKey() // <editor-fold defaultstate="collapsed">
{
return getSeed(this.bitLength).buffer;
} // </editor-fold>
/**
* Algorithm name GOST R 34.11-PFXKDF<br><br>
*
* Derive bits from password (PKCS12 mode)
* <ul>
* <li>algorithm.salt - random value, salt</li>
* <li>algorithm.iterations - number of iterations</li>
* </ul>
* @memberOf GostDigest
* @method deriveBits
* @instance
* @param {ArrayBuffer} baseKey - password after UTF-8 decoding
* @param {number} length output bit-length
* @returns {ArrayBuffer} result
*/
function deriveBitsPFXKDF(baseKey, length) // <editor-fold defaultstate="collapsed">
{
if (length % 8 > 0)
throw new DataError('Length must multiple of 8');
var u = this.bitLength / 8, v = (this.digest === digest94) ? 32 : 64,
n = length / 8, r = this.iterations;
// 1. Construct a string, D (the "diversifier"), by concatenating v/8
// copies of ID.
var ID = this.diversifier, D = new Uint8Array(v);
for (var i = 0; i < v; i++)
D[i] = ID;
// 2. Concatenate copies of the salt together to create a string S of
// length v(ceiling(s/v)) bits (the final copy of the salt may be
// truncated to create S). Note that if the salt is the empty
// string, then so is S.
var S0 = new Uint8Array(buffer(this.salt)), s = S0.length,
slen = v * Math.ceil(s / v), S = new Uint8Array(slen);
for (var i = 0; i < slen; i++)
S[i] = S0[i % s];
// 3. Concatenate copies of the password together to create a string P
// of length v(ceiling(p/v)) bits (the final copy of the password
// may be truncated to create P). Note that if the password is the
// empty string, then so is P.
var P0 = new Uint8Array(buffer(baseKey)), p = P0.length,
plen = v * Math.ceil(p / v), P = new Uint8Array(plen);
for (var i = 0; i < plen; i++)
P[i] = P0[i % p];
// 4. Set I=S||P to be the concatenation of S and P.
var I = new Uint8Array(slen + plen);
arraycopy(S, 0, I, 0, slen);
arraycopy(P, 0, I, slen, plen);
// 5. Set c=ceiling(n/u).
var c = Math.ceil(n / u);
// 6. For i=1, 2, ..., c, do the following:
var A = new Uint8Array(c * u);
for (var i = 0; i < c; i++) {
// A. Set A2=H^r(D||I). (i.e., the r-th hash of D||1,
// H(H(H(... H(D||I))))
var H = new Uint8Array(v + slen + plen);
arraycopy(D, 0, H, 0, v);
arraycopy(I, 0, H, v, slen + plen);
for (var j = 0; j < r; j++)
H = new Uint8Array(this.digest(H));
arraycopy(H, 0, A, i * u, u);
// B. Concatenate copies of Ai to create a string B of length v
// bits (the final copy of Ai may be truncated to create B).
var B = new Uint8Array(v);
for (var j = 0; j < v; j++)
B[j] = H[j % u];
// C. Treating I as a concatenation I_0, I_1, ..., I_(k-1) of v-bit
// blocks, where k=ceiling(s/v)+ceiling(p/v), modify I by
// setting I_j=(I_j+B+1) mod 2^v for each j.
var k = (slen + plen) / v;
for (j = 0; j < k; j++) {
var cf = 1, w;
for (var l = v - 1; l >= 0; --l) {
w = I[v * j + l] + B[l] + cf;
cf = w >>> 8;
I[v * j + l] = w & 0xff;
}
}
}
// 7. Concatenate A_1, A_2, ..., A_c together to form a pseudorandom
// bit string, A.
// 8. Use the first n bits of A as the output of this entire process.
var R = new Uint8Array(n);
arraycopy(A, 0, R, 0, n);
return R.buffer;
} // </editor-fold>
/**
* Algorithm name GOST R 34.11-KDF<br><br>
*
* Derive bits for KEK deversification in 34.10-2012 algorithm
* KDF(KEK, UKM, label) = HMAC256 (KEK, 0x01|label|0x00|UKM|0x01|0x00)
* Default label = 0x26|0xBD|0xB8|0x78
*
* @memberOf GostDigest
* @method deriveBits
* @instance
* @param {(ArrayBuffer|TypedArray)} baseKey base key for deriviation
* @param {number} length output bit-length
* @returns {ArrayBuffer} result
*/
function deriveBitsKDF(baseKey, length) // <editor-fold defaultstate="collapsed">
{
if (length % 8 > 0)
throw new DataError('Length must be multiple of 8');
var rlen = length / 8, label, context = new Uint8Array(buffer(this.context)),
blen = this.bitLength / 8, n = Math.ceil(rlen / blen);
if (this.label)
label = new Uint8Array(buffer(this.label));
else
label = new Uint8Array([0x26, 0xBD, 0xB8, 0x78]);
var result = new Uint8Array(rlen);
for (var i = 0; i < n; i++) {
var data = new Uint8Array(label.length + context.length + 4);
data[0] = i + 1;
data.set(label, 1);
data[label.length + 1] = 0x00;
data.set(context, label.length + 2);
data[data.length - 2] = length >>> 8;
data[data.length - 1] = length & 0xff;
result.set(new Uint8Array(signHMAC.call(this, baseKey, data), 0,
i < n - 1 ? blen : rlen - i * blen), i * blen);
}
return result.buffer;
} // </editor-fold>
/**
* Algorithm name GOST R 34.11-PBKDF1<br><br>
*
* Derive bits from password
* <ul>
* <li>algorithm.salt - random value, salt</li>
* <li>algorithm.iterations - number of iterations</li>
* </ul>
* @memberOf GostDigest
* @method deriveBits
* @instance
* @param {ArrayBuffer} baseKey - password after UTF-8 decoding
* @param {number} length output bit-length
* @returns {ArrayBuffer} result
*/
function deriveBitsPBKDF1(baseKey, length) // <editor-fold defaultstate="collapsed">
{
if (length < this.bitLength / 2 || length % 8 > 0)
throw new DataError('Length must be more than ' + this.bitLength / 2 + ' bits and multiple of 8');
var hLen = this.bitLength / 8, dkLen = length / 8,
c = this.iterations,
P = new Uint8Array(buffer(baseKey)),
S = new Uint8Array(buffer(this.salt)),
slen = S.length, plen = P.length,
T = new Uint8Array(plen + slen),
DK = new Uint8Array(dkLen);
if (dkLen > hLen)
throw new DataError('Invalid parameters: Length value');
arraycopy(P, 0, T, 0, plen);
arraycopy(S, 0, T, plen, slen);
for (var i = 0; i < c; i++)
T = new Uint8Array(this.digest(T));
arraycopy(T, 0, DK, 0, dkLen);
return DK.buffer;
} // </editor-fold>
/**
* Algorithm name GOST R 34.11-PBKDF2<br><br>
*
* Derive bits from password
* <ul>
* <li>algorithm.salt - random value, salt</li>
* <li>algorithm.iterations - number of iterations</li>
* </ul>
* @memberOf GostDigest
* @method deriveBits
* @instance
* @param {ArrayBuffer} baseKey - password after UTF-8 decoding
* @param {number} length output bit-length
* @returns {ArrayBuffer} result
*/
function deriveBitsPBKDF2(baseKey, length) // <editor-fold defaultstate="collapsed">
{
var diversifier = this.diversifier || 1; // For PKCS12 MAC required 3*length
length = length * diversifier;
if (length < this.bitLength / 2 || length % 8 > 0)
throw new DataError('Length must be more than ' + this.bitLength / 2 + ' bits and multiple of 8');
var hLen = this.bitLength / 8, dkLen = length / 8,
c = this.iterations,
P = new Uint8Array(buffer(baseKey)),
S = new Uint8Array(buffer(this.salt));
var slen = S.byteLength,
data = new Uint8Array(slen + 4);
arraycopy(S, 0, data, 0, slen);
if (dkLen > (0xffffffff - 1) * 32)
throw new DataError('Invalid parameters: Length value');
var n = Math.ceil(dkLen / hLen),
DK = new Uint8Array(dkLen);
for (var i = 1; i <= n; i++) {
data[slen] = i >>> 24 & 0xff;
data[slen + 1] = i >>> 16 & 0xff;
data[slen + 2] = i >>> 8 & 0xff;
data[slen + 3] = i & 0xff;
var U = new Uint8Array(signHMAC.call(this, P, data)), Z = U;
for (var j = 1; j < c; j++) {
U = new Uint8Array(signHMAC.call(this, P, U));
for (var k = 0; k < hLen; k++)
Z[k] = U[k] ^ Z[k];
}
var ofs = (i - 1) * hLen;