@syncfusion/ej2-pdf
Version:
Feature-rich JavaScript PDF library with built-in support for loading and manipulating PDF document.
474 lines (473 loc) • 19.8 kB
JavaScript
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
/**
* Base cipher interface for internal cipher implementations.
*
* @private
*/
var _Cipher = /** @class */ (function () {
function _Cipher() {
}
return _Cipher;
}());
export { _Cipher };
/**
* AES-like advanced encryption base used internally for PDF encryption ciphers.
*
* @private
*/
var _AdvancedEncryptionBaseCipher = /** @class */ (function (_super) {
__extends(_AdvancedEncryptionBaseCipher, _super);
function _AdvancedEncryptionBaseCipher() {
var _this = _super !== null && _super.apply(this, arguments) || this;
/**
* Buffer used for partial block accumulation.
*
* @private
*/
_this._buffer = new Uint8Array(16);
/**
* Current buffer write position.
*
* @private
*/
_this._position = 0;
/**
* Substitution box used for byte substitution.
*
* @private
*/
_this._s = new Uint8Array([
0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b,
0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0,
0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26,
0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2,
0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0,
0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed,
0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f,
0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5,
0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec,
0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14,
0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c,
0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d,
0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f,
0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e,
0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11,
0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f,
0xb0, 0x54, 0xbb, 0x16
]);
/**
* Inverse S-box used for decryption.
*
* @private
*/
_this._inverseS = new Uint8Array([
0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e,
0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87,
0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32,
0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49,
0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16,
0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50,
0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05,
0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02,
0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41,
0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8,
0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89,
0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b,
0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59,
0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d,
0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d,
0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63,
0x55, 0x21, 0x0c, 0x7d
]);
/**
* Mix column table used in block transformations.
*
* @private
*/
_this._mix = new Uint32Array([
0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927,
0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45,
0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb,
0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381,
0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf,
0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66,
0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28,
0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012,
0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec,
0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e,
0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd,
0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7,
0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89,
0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b,
0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815,
0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f,
0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa,
0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8,
0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36,
0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c,
0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742,
0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea,
0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4,
0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e,
0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360,
0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502,
0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87,
0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd,
0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3,
0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621,
0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f,
0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55,
0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26,
0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844,
0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba,
0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480,
0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce,
0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67,
0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929,
0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713,
0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed,
0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f,
0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3
]);
return _this;
}
Object.defineProperty(_AdvancedEncryptionBaseCipher.prototype, "_mixCol", {
/**
* Lazily-created mix column byte table.
*
* @private
* @returns {Uint8Array} The mix column table as a `Uint8Array`.
*/
get: function () {
if (typeof this._mixC === 'undefined' || this._mixC === null) {
this._mixC = new Uint8Array(256);
for (var i = 0; i < 256; i++) {
if (i < 128) {
this._mixC[i] = i << 1;
}
else {
this._mixC[i] = (i << 1) ^ 0x1b;
}
}
}
return this._mixC;
},
enumerable: true,
configurable: true
});
/**
* Core single-block decryption routine.
*
* @private
* @param {Uint8Array} input - 16-byte input block.
* @param {Uint8Array} key - Expanded key schedule.
* @returns {Uint8Array} Decrypted 16-byte block.
*/
_AdvancedEncryptionBaseCipher.prototype._decrypt = function (input, key) {
var t;
var u;
var v;
var state = new Uint8Array(16);
state.set(input);
for (var j = 0, k = this._keySize; j < 16; ++j, ++k) {
state[j] ^= key[k];
}
for (var i = this._cyclesOfRepetition - 1; i >= 1; --i) {
t = state[13];
state[13] = state[9];
state[9] = state[5];
state[5] = state[1];
state[1] = t;
t = state[14];
u = state[10];
state[14] = state[6];
state[10] = state[2];
state[6] = t;
state[2] = u;
t = state[15];
u = state[11];
v = state[7];
state[15] = state[3];
state[11] = t;
state[7] = u;
state[3] = v;
for (var j = 0; j < 16; ++j) {
state[j] = this._inverseS[state[j]];
}
for (var j = 0, k = i * 16; j < 16; ++j, ++k) {
state[j] ^= key[k];
}
for (var j = 0; j < 16; j += 4) {
var s0 = this._mix[state[j]];
var s1 = this._mix[state[j + 1]];
var s2 = this._mix[state[j + 2]];
var s3 = this._mix[state[j + 3]];
t = s0 ^ (s1 >>> 8) ^ (s1 << 24) ^ (s2 >>> 16) ^ (s2 << 16) ^ (s3 >>> 24) ^ (s3 << 8);
state[j] = (t >>> 24) & 0xff;
state[j + 1] = (t >> 16) & 0xff;
state[j + 2] = (t >> 8) & 0xff;
state[j + 3] = t & 0xff;
}
}
t = state[13];
state[13] = state[9];
state[9] = state[5];
state[5] = state[1];
state[1] = t;
t = state[14];
u = state[10];
state[14] = state[6];
state[10] = state[2];
state[6] = t;
state[2] = u;
t = state[15];
u = state[11];
v = state[7];
state[15] = state[3];
state[11] = t;
state[7] = u;
state[3] = v;
for (var j = 0; j < 16; ++j) {
state[j] = this._inverseS[state[j]];
state[j] ^= key[j];
}
return state;
};
/**
* Core single-block encryption routine.
*
* @private
* @param {Uint8Array} input - 16-byte input block.
* @param {Uint8Array} key - Expanded key schedule.
* @returns {Uint8Array} Encrypted 16-byte block.
*/
_AdvancedEncryptionBaseCipher.prototype._encryptBlock = function (input, key) {
var s = this._s;
var t;
var u;
var v;
var state = new Uint8Array(16);
state.set(input);
for (var j = 0; j < 16; ++j) {
state[j] ^= key[j];
}
for (var i = 1; i < this._cyclesOfRepetition; i++) {
for (var j = 0; j < 16; ++j) {
state[j] = s[state[j]];
}
v = state[1];
state[1] = state[5];
state[5] = state[9];
state[9] = state[13];
state[13] = v;
v = state[2];
u = state[6];
state[2] = state[10];
state[6] = state[14];
state[10] = v;
state[14] = u;
v = state[3];
u = state[7];
t = state[11];
state[3] = state[15];
state[7] = v;
state[11] = u;
state[15] = t;
for (var j = 0; j < 16; j += 4) {
var s0 = state[j + 0];
var s1 = state[j + 1];
var s2 = state[j + 2];
var s3 = state[j + 3];
t = s0 ^ s1 ^ s2 ^ s3;
state[j + 0] ^= t ^ this._mixCol[s0 ^ s1];
state[j + 1] ^= t ^ this._mixCol[s1 ^ s2];
state[j + 2] ^= t ^ this._mixCol[s2 ^ s3];
state[j + 3] ^= t ^ this._mixCol[s3 ^ s0];
}
for (var j = 0, k = i * 16; j < 16; ++j, ++k) {
state[j] ^= key[k];
}
}
for (var j = 0; j < 16; ++j) {
state[j] = s[state[j]];
}
v = state[1];
state[1] = state[5];
state[5] = state[9];
state[9] = state[13];
state[13] = v;
v = state[2];
u = state[6];
state[2] = state[10];
state[6] = state[14];
state[10] = v;
state[14] = u;
v = state[3];
u = state[7];
t = state[11];
state[3] = state[15];
state[7] = v;
state[11] = u;
state[15] = t;
for (var j = 0, k = this._keySize; j < 16; ++j, ++k) {
state[j] ^= key[k];
}
return state;
};
/**
* Helper that decrypts a sequence of bytes using internal buffering.
*
* @private
* @param {Uint8Array} data - Input bytes to decrypt.
* @param {boolean} finalize - Whether to finalize (remove padding) for the last block.
* @returns {Uint8Array} Decrypted bytes.
*/
_AdvancedEncryptionBaseCipher.prototype._decryptBlockHelper = function (data, finalize) {
var sourceLength = data.length;
var buffer = this._buffer;
var bufferLength = this._position;
var result = [];
var iv = this._iv;
for (var i = 0; i < sourceLength; ++i) {
buffer[bufferLength] = data[i];
++bufferLength;
if (bufferLength < 16) {
continue;
}
var plain = this._decrypt(buffer, this._key);
for (var j = 0; j < 16; ++j) {
plain[j] ^= iv[j];
}
iv = buffer;
result.push(plain);
buffer = new Uint8Array(16);
bufferLength = 0;
}
this._buffer = buffer;
this._bufferLength = bufferLength;
this._iv = iv;
if (result.length === 0) {
return new Uint8Array(0);
}
var outputLength = 16 * result.length;
if (finalize) {
var lastBlock = result[result.length - 1];
var length_1 = lastBlock[15];
if (length_1 <= 16) {
for (var i = 15, ii = 16 - length_1; i >= ii; --i) {
if (lastBlock[i] !== length_1) {
length_1 = 0;
break;
}
}
outputLength -= length_1;
result[result.length - 1] = lastBlock.subarray(0, 16 - length_1);
}
}
var output = new Uint8Array(outputLength);
for (var i = 0, j = 0; i < result.length; ++i, j += 16) {
output.set(result[i], j);
}
return output;
};
/**
* Public-facing decrypt block implementation that sets up IV and buffering.
*
* @private
* @param {Uint8Array} data - Input data to decrypt.
* @param {boolean} finalize - Whether this is the final call (remove padding).
* @param {Uint8Array} [iv] - Optional initialization vector for decryption.
* @returns {Uint8Array} Decrypted bytes.
*/
_AdvancedEncryptionBaseCipher.prototype._decryptBlock = function (data, finalize, iv) {
var sourceLength = data.length;
var buffer = this._buffer;
var bufferLength = this._position;
if (iv) {
this._iv = iv;
}
else {
for (var i = 0; bufferLength < 16 && i < sourceLength; ++i, ++bufferLength) {
buffer[bufferLength] = data[i];
}
if (bufferLength < 16) {
this._bufferLength = bufferLength;
return new Uint8Array(0);
}
this._iv = buffer;
data = data.subarray(16);
}
this._buffer = new Uint8Array(16);
this._bufferLength = 0;
this._decryptBlock = this._decryptBlockHelper;
return this._decryptBlock(data, finalize);
};
/**
* Encrypt data using streaming semantics and internal buffering.
*
* @private
* @param {Uint8Array} data - Bytes to encrypt.
* @param {Uint8Array} [iv] - Optional initialization vector.
* @returns {Uint8Array} Encrypted bytes.
*/
_AdvancedEncryptionBaseCipher.prototype._encrypt = function (data, iv) {
var sourceLength = data.length;
var buffer = this._buffer;
var bufferLength = this._position;
var result = [];
if (!iv) {
iv = new Uint8Array(16);
}
for (var i = 0; i < sourceLength; ++i) {
buffer[bufferLength] = data[i];
++bufferLength;
if (bufferLength < 16) {
continue;
}
for (var j = 0; j < 16; ++j) {
buffer[j] ^= iv[j];
}
var cipher = this._encryptBlock(buffer, this._key);
iv = cipher;
result.push(cipher);
buffer = new Uint8Array(16);
bufferLength = 0;
}
this._buffer = buffer;
this._bufferLength = bufferLength;
this._iv = iv;
if (result.length === 0) {
return new Uint8Array(0);
}
var outputLength = 16 * result.length;
var output = new Uint8Array(outputLength);
for (var i = 0, j = 0; i < result.length; ++i, j += 16) {
output.set(result[i], j);
}
return output;
};
return _AdvancedEncryptionBaseCipher;
}(_Cipher));
export { _AdvancedEncryptionBaseCipher };