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| define(["require", "exports", "../../../enumerator", "../../../pdf-document", "../../../pdf-primitives", "../pdf-certificate", "../x509/x509-certificate-parser", "./signature-privatekey", "./cryptographic-signer", "../../../utils"], function (require, exports, enumerator_1, pdf_document_1, pdf_primitives_1, pdf_certificate_1, x509_certificate_parser_1, signature_privatekey_1, cryptographic_signer_1, utils_1) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var _PdfSignatureDictionary = (function () {
function _PdfSignatureDictionary(arg1, arg2) {
this._dictionary = new pdf_primitives_1._PdfDictionary();
this._transParam = 'TransformParams';
this._signaturePermissionsDictionary = 'DocMDP';
this._cryptographicFilterType = 'adbe.pkcs7.detached';
this._advanceFilterType = 'ETSI.CAdES.detached';
this._requestForCommentsFilterType = 'ETSI.RFC3161';
this._estimatedSize = 8192;
if (!arg1) {
throw new Error('A valid argument must be provided.');
}
if (!arg2) {
throw new Error('Argument signature is null or undefined.');
}
if (arg1 instanceof pdf_document_1.PdfDocument) {
this._document = arg1;
this._crossReference = arg1._crossReference;
}
else {
this._dictionary = arg1;
}
this._signature = arg2;
this._certificate = arg2._certificate;
}
_PdfSignatureDictionary.prototype._parsePdfContents = function (contents) {
var result;
if (contents instanceof Uint8Array) {
return contents;
}
else if (typeof contents === 'string') {
var trimmed = contents.trim();
var isHexFormat = trimmed.startsWith('<') && trimmed.endsWith('>');
if (isHexFormat) {
var hex = trimmed.slice(1, -1).replace(/[^0-9a-fA-F]/g, '');
if (hex.length % 2 !== 0) {
hex += '0';
}
result = new Uint8Array(hex.length / 2);
for (var i = 0; i < hex.length; i += 2) {
result[i / 2] = parseInt(hex.slice(i, i + 2), 16);
}
return result;
}
result = new Uint8Array(trimmed.length);
for (var i = 0; i < trimmed.length; i++) {
result[i] = trimmed.charCodeAt(i) & 0xff;
}
return result;
}
return result;
};
_PdfSignatureDictionary.prototype._parseDigestAlgorithm = function () {
var digest;
var cmsSigner;
if (this._dictionary.has('Contents')) {
var contents = this._dictionary.get('Contents');
var bytes = this._parsePdfContents(contents);
var isDeferredSigning = bytes && bytes.length > 0 && bytes.every(function (byte) { return byte === 0; });
if (bytes && bytes.length > 0 && !isDeferredSigning) {
var parser = new x509_certificate_parser_1._PdfX509CertificateParser();
var certificateChain = parser._readCertificate(bytes, true);
var certificate = new pdf_certificate_1._PdfCertificate(certificateChain);
this._certificate = certificate;
cmsSigner = new cryptographic_signer_1._PdfCryptographicMessageSyntaxSigner(bytes);
}
}
if (cmsSigner) {
var messageDigest = cmsSigner._getHashAlgorithm();
switch (messageDigest) {
case 'SHA512':
digest = enumerator_1.DigestAlgorithm.sha512;
break;
case 'SHA384':
digest = enumerator_1.DigestAlgorithm.sha384;
break;
case 'SHA1':
digest = enumerator_1.DigestAlgorithm.sha1;
break;
case 'RIPEMD160':
digest = enumerator_1.DigestAlgorithm.ripemd160;
break;
default:
digest = enumerator_1.DigestAlgorithm.sha256;
break;
}
}
return digest;
};
_PdfSignatureDictionary.prototype._parseDirect = function (key) {
var value;
if (this._dictionary.has(key)) {
value = this._dictionary.get(key);
}
return value;
};
_PdfSignatureDictionary.prototype._parseSignedDate = function () {
var signedDate;
if (this._dictionary.has('M')) {
var dateEntry = this._dictionary.get('M');
signedDate = this._parsePdfDate(dateEntry);
}
return signedDate;
};
_PdfSignatureDictionary.prototype._parsePdfDate = function (v) {
if (typeof v !== 'string' || v.length === 0) {
return undefined;
}
var s = v.trim();
if (s.startsWith('D:')) {
s = s.slice(2);
}
var year = Number(s.slice(0, 4));
var month = Number(s.slice(4, 6) || '01');
var day = Number(s.slice(6, 8) || '01');
var hour = Number(s.slice(8, 10) || '00');
var minute = Number(s.slice(10, 12) || '00');
var second = Number(s.slice(12, 14) || '00');
var offsetMinutes = 0;
var tzStart = 14;
if (s.length > tzStart) {
var tzRaw = s.slice(tzStart).replace(/'/g, '');
if (tzRaw.toUpperCase() !== 'Z') {
var sign = tzRaw.startsWith('-') ? -1 : 1;
var hh = Number(tzRaw.slice(1, 3));
var mm = tzRaw.length >= 5 ? Number(tzRaw.slice(3, 5)) : 0;
offsetMinutes = sign * (hh * 60 + mm);
}
}
var millisLocal = Date.UTC(year, month - 1, day, hour, minute, second);
var time = millisLocal - offsetMinutes * 60000;
var dt = new Date(time);
return isNaN(dt.getTime()) ? undefined : dt;
};
_PdfSignatureDictionary.prototype._dictionarySave = function (buffer) {
if (!this._dictionary || buffer.length <= 0) {
throw new Error('dictionary or writer is null.');
}
if (this._signature) {
this._addRequiredItems();
this._addOptionalItems();
}
this._addContents(buffer);
this._addRange(buffer);
if (this._signature && this._signature._certify) {
this._addDigest(buffer);
}
};
_PdfSignatureDictionary.prototype._addDigest = function (buffer) {
if (this._signature && this._signature._certify && this._allowMessageDigestProcessing()) {
var writer = this._document._crossReference;
writer._writeString("/Reference[<</TransformParams<<\r\n/V /1.2\r\n/P " + this._signature._documentPermissions + "\r\n /Type /TransformParams\r\n>>\r\n/TransformMethod/DocMDP/Type/SigRef/DigestValue", buffer);
var offset = buffer.length + writer._currentLength;
writer._writeString('<', buffer);
for (var i = 0; i < 32; i++) {
writer._writeString('0', buffer);
}
var reference = this._document._catalog._catalogDictionary.objId.toString();
writer._writeString('>/DigestLocation[' + offset + ' 34]/DigestMethod/MD5/Data ' + reference + ' R>><</TransformParams<<\r\n/V /1.2\r\n/Fields [(Signature)]\r\n/Type /TransformParams\r\n/Action /Include\r\n>>\r\n/TransformMethod/FieldMDP/Type/SigRef/DigestValue', buffer);
offset = buffer.length + writer._currentLength;
writer._writeString('<', buffer);
for (var i = 0; i < 32; i++) {
writer._writeString('0', buffer);
}
writer._writeString('>/DigestLocation[' + offset + ' 34]/DigestMethod/MD5/Data ' + reference + ' R>>]\r\n', buffer);
}
};
_PdfSignatureDictionary.prototype._addRequiredItems = function () {
if (this._signature && this._signature._certify && this._allowMessageDigestProcessing()) {
this._addReference();
}
this._addType();
this._addDate();
this._addFilter();
this._addSubFilter();
};
_PdfSignatureDictionary.prototype._allowMessageDigestProcessing = function () {
var dictionary = this._document._catalog._catalogDictionary.get('Perms');
if (typeof dictionary !== 'undefined' && dictionary !== null) {
var docMDP = dictionary.get('DocMDP');
if (docMDP instanceof pdf_primitives_1._PdfReference) {
var docMDPDictionary = this._document._crossReference._fetch(docMDP);
var signatureDictionary = this._dictionary;
if (signatureDictionary.has('Reference') || docMDPDictionary.has('Reference')) {
return false;
}
}
else if (docMDP instanceof pdf_primitives_1._PdfDictionary) {
if (docMDP.objId !== this._dictionary.objId) {
return false;
}
}
}
return true;
};
_PdfSignatureDictionary.prototype._addOptionalItems = function () {
if (this._signature) {
if (this._signature._reason) {
this._dictionary.update('Reason', this._signature._reason);
}
if (this._signature._locationInfo) {
this._dictionary.update('Location', this._signature._locationInfo);
}
if (this._signature._contactInfo) {
this._dictionary.update('ContactInfo', this._signature._contactInfo);
}
if (this._signature._signedName) {
this._dictionary.update('Name', this._signature._signedName);
var tempDictionary = new pdf_primitives_1._PdfDictionary();
var appDictionary = new pdf_primitives_1._PdfDictionary();
tempDictionary.update('Name', this._signature._signedName);
var ref = this._document._crossReference._getNextReference();
this._document._crossReference._cacheMap.set(ref, tempDictionary);
appDictionary.update('App', ref);
ref = this._document._crossReference._getNextReference();
this._document._crossReference._cacheMap.set(ref, appDictionary);
this._dictionary.update('Prop_Build', ref);
}
}
};
_PdfSignatureDictionary.prototype._addReference = function () {
var trans = new pdf_primitives_1._PdfDictionary();
var reference = new pdf_primitives_1._PdfDictionary();
var array = [];
trans.update('V', pdf_primitives_1._PdfName.get('1.2'));
trans.update('P', this._signature._documentPermissions);
trans.update('Type', pdf_primitives_1._PdfName.get(this._transParam));
reference.update('TransformMethod', pdf_primitives_1._PdfName.get(this._signaturePermissionsDictionary));
reference.update('Type', pdf_primitives_1._PdfName.get('SigRef'));
reference.update(this._transParam, trans);
reference.update(this._transParam, trans);
array.push(reference);
this._dictionary.update('Reference', array);
};
_PdfSignatureDictionary.prototype._addType = function () {
if (this._certificate) {
this._dictionary.update('Type', new pdf_primitives_1._PdfName('Sig'));
}
};
_PdfSignatureDictionary.prototype._addDate = function () {
var dateTime = new Date();
if (this._signature && this._signature._signedDate) {
dateTime = this._signature._signedDate;
}
var year = dateTime.getFullYear().toString();
var month = utils_1._padStart((dateTime.getMonth() + 1).toString(), 2, '0');
var day = utils_1._padStart(dateTime.getDate().toString(), 2, '0');
var hours = utils_1._padStart(dateTime.getHours().toString(), 2, '0');
var minutes = utils_1._padStart(dateTime.getMinutes().toString(), 2, '0');
var seconds = utils_1._padStart(dateTime.getSeconds().toString(), 2, '0');
var totalMinutesOffset = dateTime.getTimezoneOffset();
var offsetHours = utils_1._padStart(Math.floor(Math.abs(totalMinutesOffset) / 60).toString(), 2, '0');
var offsetMinutes = utils_1._padStart((Math.abs(totalMinutesOffset) % 60).toString(), 2, '0');
var offsetSign = totalMinutesOffset > 0 ? '-' : '+';
this._dictionary.update('M', "D:" + year + month + day + hours + minutes + seconds + offsetSign + offsetHours + "'" + offsetMinutes + "'");
};
_PdfSignatureDictionary.prototype._addFilter = function () {
this._dictionary.update('Filter', new pdf_primitives_1._PdfName('Adobe.PPKLite'));
};
_PdfSignatureDictionary.prototype._addSubFilter = function () {
if (this._signature && this._signature._cryptographicStandard === enumerator_1.CryptographicStandard.cades) {
this._dictionary.update('SubFilter', new pdf_primitives_1._PdfName(this._advanceFilterType));
}
else {
this._dictionary.update('SubFilter', new pdf_primitives_1._PdfName(this._cryptographicFilterType));
}
};
_PdfSignatureDictionary.prototype._getLength = function () {
var length = 0;
if (this._crossReference._uint8Chunks.length > 0) {
for (var i = 0; i < this._crossReference._uint8Chunks.length; i++) {
var arr = this._crossReference._uint8Chunks[i];
length += arr.length;
}
}
return length;
};
_PdfSignatureDictionary.prototype._addContents = function (buffer) {
var chunksLength = this._getLength();
var writer = this._crossReference;
writer._writeString('/Contents ', buffer);
this._firstRangeLength = this._crossReference._currentLength + buffer.length + chunksLength;
var length = this._estimatedSize * 2;
if (this._signature && this._certificate) {
length = this._estimatedSize;
}
writer._writeString('<' + ' '.repeat(length * 2) + '>', buffer);
this._secondRangeIndex = buffer.length + chunksLength + this._crossReference._currentLength;
writer._writeString('\r\n', buffer);
};
_PdfSignatureDictionary.prototype._addRange = function (buffer) {
var chunksLength = this._getLength();
var writer = this._crossReference;
writer._writeString("" + '/' + 'ByteRange' + ' ' + '[', buffer);
this._startPositionByteRange = buffer.length + this._document._crossReference._currentLength + chunksLength;
for (var i = 0; i < 32; i++) {
writer._writeString(' ', buffer);
}
writer._writeString("" + ']' + '\r\n', buffer);
};
_PdfSignatureDictionary.prototype._documentSaved = function (buffer) {
var secondRangeLength = buffer.length - this._secondRangeIndex;
var byteRangeStrings = ['0 ', this._firstRangeLength + " ",
this._secondRangeIndex + " ",
secondRangeLength.toString()
];
var currentPosition = this._saveRangeItem(buffer, byteRangeStrings[0], this._startPositionByteRange);
currentPosition = this._saveRangeItem(buffer, byteRangeStrings[1], currentPosition);
currentPosition = this._saveRangeItem(buffer, byteRangeStrings[2], currentPosition);
this._saveRangeItem(buffer, byteRangeStrings[3], currentPosition);
var buf1 = buffer.subarray(0, this._firstRangeLength);
var buf2 = buffer.subarray(this._secondRangeIndex);
var combined = new Uint8Array(buf1.length + buf2.length);
combined.set(buf1, 0);
combined.set(buf2, buf1.length);
var pkcs7Content = this._getCryptographicStandardContent(combined);
var hexEncodedSignature = utils_1._bytesToHex(pkcs7Content);
var signatureStartPos = this._firstRangeLength;
buffer[signatureStartPos] = '<'.charCodeAt(0) & 0xff;
for (var i = 0; i < hexEncodedSignature.length; i++) {
buffer[signatureStartPos + 1 + i] = hexEncodedSignature.charCodeAt(i) & 0xff;
}
var signatureEndPos = signatureStartPos + 1 + hexEncodedSignature.length;
var paddingLength = this._secondRangeIndex - signatureEndPos - 1;
if (paddingLength > 0) {
buffer.fill('0'.charCodeAt(0) & 0xff, signatureEndPos, signatureEndPos + paddingLength);
}
buffer[this._secondRangeIndex - 1] = '>'.charCodeAt(0) & 0xff;
};
_PdfSignatureDictionary.prototype._getCryptographicStandardContent = function (data) {
try {
var hashAlgorithm = '';
var externalSignature = void 0;
var crlBytes = void 0;
var ocspByte = void 0;
var chain_1 = [];
if (this._signature._externalSignatureCallback) {
if (this._signature._externalChain && this._signature._externalChain.length > 0) {
hashAlgorithm = enumerator_1.DigestAlgorithm[this._signature._digestAlgorithm];
var pks = new signature_privatekey_1._PdfSignaturePrivateKey(hashAlgorithm);
externalSignature = pks;
chain_1.push.apply(chain_1, this._signature._externalChain);
}
else {
var value = this._signature._externalSignatureCallback(data, {
algorithm: this._signature._digestAlgorithm,
cryptographicStandard: enumerator_1.CryptographicStandard.cms
});
return value.signedData;
}
}
else {
var certificateAlias_1 = '';
var pk_1;
var keys = this._certificate._publicKeyCryptographyCertificate._keys;
keys.forEach(function (keyEntry, alias) {
var entry = keyEntry;
if (entry.privateKey) {
certificateAlias_1 = alias;
pk_1 = entry;
}
});
var certificates = this._certificate._publicKeyCryptographyCertificate._getCertificateChain(certificateAlias_1);
certificates.forEach(function (c) {
chain_1.push(c._certificate);
});
var digest = enumerator_1.DigestAlgorithm[this._signature._digestAlgorithm];
var pks = new signature_privatekey_1._PdfSignaturePrivateKey(digest, pk_1.privateKey);
hashAlgorithm = digest;
externalSignature = pks;
}
var pkcs7 = new cryptographic_signer_1._PdfCryptographicMessageSyntaxSigner(null, chain_1, hashAlgorithm, false);
var hash = pkcs7._getDigestAlgorithm()._digest(data, hashAlgorithm);
var sequenceDataSet = pkcs7._getSequenceDataSet(hash, ocspByte, crlBytes, this._signature._cryptographicStandard);
var extSignature = void 0;
if (this._signature._externalChain && this._signature._externalChain.length > 0) {
var value = this._signature._externalSignatureCallback(sequenceDataSet, { algorithm: this._signature._digestAlgorithm,
cryptographicStandard: this._signature._cryptographicStandard });
if (value && value.signedData) {
extSignature = value.signedData;
}
if (!value.signedData) {
return new Uint8Array(this._estimatedSize).fill(0);
}
}
else {
extSignature = externalSignature._sign(sequenceDataSet);
}
pkcs7._setSignedData(extSignature, null, externalSignature._getEncryptionAlgorithm());
var cryptographicStandard = void 0;
if (this._signature && this._signature._cryptographicStandard) {
cryptographicStandard = this._signature._cryptographicStandard;
}
else {
cryptographicStandard = enumerator_1.CryptographicStandard.cms;
}
return pkcs7._sign(hash, null, ocspByte, crlBytes, cryptographicStandard, hashAlgorithm);
}
catch (error) {
return new Uint8Array(this._estimatedSize).fill(0);
}
};
_PdfSignatureDictionary.prototype._saveRangeItem = function (buffer, str, startPosition) {
var utf8Bytes = [];
for (var i = 0; i < str.length; i++) {
utf8Bytes.push(str.charCodeAt(i) & 0xff);
}
buffer.set(utf8Bytes, startPosition);
return startPosition + str.length;
};
return _PdfSignatureDictionary;
}());
exports._PdfSignatureDictionary = _PdfSignatureDictionary;
});
|