diff --git a/javascript/src/utilities/pdfUtilities.js b/javascript/src/utilities/pdfUtilities.js
index 9449fca83b6dcd08ee19139f7bac2312bbb6b55d..952b374279ff3c58b81c8b96882f7dacb41d1b63 100644
--- a/javascript/src/utilities/pdfUtilities.js
+++ b/javascript/src/utilities/pdfUtilities.js
@@ -9,362 +9,367 @@
*/
import {
- ObjectIdentifier,
- UTCTime,
- OctetString
+ ObjectIdentifier,
+ UTCTime,
+ OctetString
} from 'asn1js';
import {
- ContentInfo,
- SignedData,
- Attribute,
- SignerInfo,
- IssuerAndSerialNumber,
- SignedAndUnsignedAttributes,
- EncapsulatedContentInfo,
- getCrypto
+ ContentInfo,
+ SignedData,
+ Attribute,
+ SignerInfo,
+ IssuerAndSerialNumber,
+ SignedAndUnsignedAttributes,
+ EncapsulatedContentInfo,
+ getCrypto
} from 'pkijs';
import {
- parseCertificate,
- parsePrivateKey
+ parseCertificate,
+ parsePrivateKey,
} from './signingUtilities';
//keep this import to include the patched version of pdfjs library
import {PDFJS} from "../lib/pdfjs.parser.js";
+
function createXrefTable(xrefEntries) {
- xrefEntries = sortOnKeys(xrefEntries);
- let retVal = 'xref\n';
- let last = -2;
- for (let i in xrefEntries) {
- i = parseInt(i);
- if (typeof xrefEntries[i].offset === 'undefined') { continue; }
- retVal += calcFlow(i, last, xrefEntries);
- const offset = xrefEntries[i].offset;
- retVal += pad10(offset) + ' ' + pad5(xrefEntries[i].gen) + ' ' + (xrefEntries[i].free ? 'f' : 'n') + ' \n';
- last = i;
- }
- return retVal;
+ xrefEntries = sortOnKeys(xrefEntries);
+ var retVal ='xref\n';
+ var last = -2;
+ for(var i in xrefEntries) {
+ i = parseInt(i);
+ if(typeof xrefEntries[i].offset === 'undefined') { continue; }
+ retVal += calcFlow(i, last, xrefEntries);
+ var offset = xrefEntries[i].offset;
+ retVal += pad10(offset)+' '+pad5(xrefEntries[i].gen)+' '+(xrefEntries[i].free?'f':'n')+' \n';
+ last = i;
+ }
+ return retVal;
}
function calcFlow(i, last, xrefEntries) {
- if (last + 1 === i) { return ''; }
- let count = 1;
- while (typeof xrefEntries[i + count] !== 'undefined' &&
- typeof xrefEntries[i + count].offset !== 'undefined') { count++; }
- return i + ' ' + count + '\n';
+ if(last + 1 === i) {return '';}
+ var count = 1;
+ while(typeof xrefEntries[(i+count)] !== 'undefined'
+ && typeof xrefEntries[(i+count)].offset !== 'undefined') {count ++;}
+ return i + ' '+count+'\n';
}
function createTrailer(topDict, startxref, sha256Hex, size, prev) {
- let retVal = 'trailer <<\n';
- retVal += ' /Size ' + size + '\n';
- const refRoot = topDict.getRaw('Root');
- if (typeof refRoot !== 'undefined') {
- retVal += ' /Root ' + refRoot.num + ' ' + refRoot.gen + ' R\n';
- }
- const refInfo = topDict.getRaw('Info');
- if (typeof refInfo !== 'undefined') {
- retVal += ' /Info ' + refInfo.num + ' ' + refInfo.gen + ' R\n';
- }
- retVal += ' /ID [<' + sha256Hex.substring(0,32) + '><' + sha256Hex.substring(32,64) + '>]\n';
- if (typeof prev !== 'undefined') {
- retVal += ' /Prev ' + prev + '\n';
- }
- retVal += '>>\n';
- retVal += 'startxref\n';
- retVal += startxref + '\n';
- retVal += '%%EOF\n';
- return retVal;
+ var retVal ='trailer <<\n';
+ retVal +=' /Size '+(size)+'\n';
+ var refRoot = topDict.getRaw('Root');
+ if(typeof refRoot !== 'undefined') {
+ retVal +=' /Root '+refRoot.num+' '+refRoot.gen+' R\n';
+ }
+ var refInfo = topDict.getRaw('Info');
+ if(typeof refInfo !== 'undefined') {
+ retVal +=' /Info '+refInfo.num+' '+refInfo.gen+' R\n';
+ }
+ retVal +=' /ID [<'+sha256Hex.substring(0,32)+'><'+sha256Hex.substring(32,64)+'>]\n';
+ if(typeof prev !== 'undefined' ) {
+ retVal +=' /Prev '+prev+'\n';
+ }
+ retVal +='>>\n';
+ retVal +='startxref\n';
+ retVal +=startxref + '\n';
+ retVal +='%%EOF\n';
+ return retVal;
}
function createXrefTableAppend(xrefEntries) {
- xrefEntries = sortOnKeys(xrefEntries);
-
- let retVal = 'xref\n';
- let last = -2;
- for (let i in xrefEntries) {
- i = parseInt(i);
- if (typeof xrefEntries[i].offset === 'undefined') { continue; }
- retVal += calcFlow(i, last, xrefEntries);
- const offset = xrefEntries[i].offset;
- retVal += pad10(offset) + ' ' + pad5(xrefEntries[i].gen) + ' ' + (xrefEntries[i].free ? 'f' : 'n') + ' \n';
- last = i;
- }
- return retVal;
+ xrefEntries = sortOnKeys(xrefEntries);
+
+ var retVal ='xref\n';
+ var last = -2;
+ for(var i in xrefEntries) {
+ i = parseInt(i);
+ if(typeof xrefEntries[i].offset === 'undefined') { continue; }
+ retVal += calcFlow(i, last, xrefEntries);
+ var offset = xrefEntries[i].offset;
+ retVal += pad10(offset)+' '+pad5(xrefEntries[i].gen)+' '+(xrefEntries[i].free?'f':'n')+' \n';
+ last = i;
+ }
+ return retVal;
}
//http://stackoverflow.com/questions/10946880/sort-a-dictionary-or-whatever-key-value-data-structure-in-js-on-word-number-ke
function sortOnKeys(dict) {
- const sorted = [];
- for (const key in dict) {
- sorted[sorted.length] = key;
- }
- sorted.sort();
+ var sorted = [];
+ for(var key in dict) {
+ sorted[sorted.length] = key;
+ }
+ sorted.sort();
- const tempDict = {};
- for (let i = 0; i < sorted.length; i++) {
- tempDict[sorted[i]] = dict[sorted[i]];
- }
+ var tempDict = {};
+ for(var i = 0; i < sorted.length; i++) {
+ tempDict[sorted[i]] = dict[sorted[i]];
+ }
- return tempDict;
+ return tempDict;
}
function removeFromArray(array, from, to) {
- const cutlen = to - from;
- const buf = new Uint8Array(array.length - cutlen);
+ var cutlen = to - from;
+ var buf = new Uint8Array(array.length - cutlen);
- for (let i = 0; i < from; i++) {
- buf[i] = array[i];
- }
- for (let i = to, len = array.length; i < len; i++) {
- buf[i - cutlen] = array[i];
- }
- return buf;
+ for (var i = 0; i < from; i++) {
+ buf[i] = array[i];
+ }
+ for (var i = to, len = array.length; i < len; i++) {
+ buf[i-cutlen] = array[i];
+ }
+ return buf;
}
-
+
function findXrefBlocks(xrefBlocks) {
- const num = xrefBlocks.length / 2;
- const retVal = [];
- for (let i = 0; i < num; i++) {
- retVal.push({start: xrefBlocks[i],
- end: xrefBlocks[i + num]});
- }
- return retVal;
+ var num = xrefBlocks.length / 2;
+ var retVal = [];
+ for (var i=0;i<num;i++) {
+ retVal.push({start: xrefBlocks[i], end: xrefBlocks[i+num]});
+ }
+ return retVal;
}
function convertUint8ArrayToBinaryString(u8Array) {
- let i, len = u8Array.length, bStr = "";
- for (i = 0; i < len; i++) {
- bStr += String.fromCharCode(u8Array[i]);
- }
- return bStr;
+ var i, len = u8Array.length, b_str = "";
+ for (i=0; i<len; i++) {
+ b_str += String.fromCharCode(u8Array[i]);
+ }
+ return b_str;
}
function arrayObjectIndexOf(array, start, end, orig) {
- for (let i = 0, len = array.length; i < len; i++) {
- if ((array[i].start === start) && (array[i].end === end) && (array[i].orig === orig)) {
- return i;
+ for(var i = 0, len = array.length; i < len; i++) {
+ if ((array[i].start === start) && (array[i].end === end) && (array[i].orig === orig)) {
+ return i;
+ }
}
- }
- return -1;
+ return -1;
}
function pad10(num) {
- const s = "000000000" + num;
- return s.substr(s.length - 10);
+ var s = "000000000" + num;
+ return s.substr(s.length-10);
}
function pad5(num) {
- const s = "0000" + num;
- return s.substr(s.length - 5);
+ var s = "0000" + num;
+ return s.substr(s.length-5);
}
function pad2(num) {
- const s = "0" + num;
- return s.substr(s.length - 2);
+ var s = "0" + num;
+ return s.substr(s.length-2);
}
function findRootEntry(xref) {
- const rootNr = xref.root.objId.substring(0, xref.root.objId.length - 1);
- return xref.entries[rootNr];
+ var rootNr = xref.root.objId.substring(0, xref.root.objId.length - 1);
+ return xref.entries[rootNr];
}
-
+
function findSuccessorEntry(xrefEntries, current) {
- //find it first
- const currentOffset = current.offset;
- let currentMin = Number.MAX_SAFE_INTEGER;
- let currentMinIndex = -1;
- for (const i in xrefEntries) {
- if (xrefEntries[i].offset > currentOffset) {
- if (xrefEntries[i].offset < currentMin) {
- currentMin = xrefEntries[i].offset;
- currentMinIndex = i;
- }
- }
- }
- if (currentMinIndex === -1) {
- return current;
- }
- return xrefEntries[currentMinIndex];
+ //find it first
+ var currentOffset = current.offset;
+ var currentMin = Number.MAX_SAFE_INTEGER;
+ var currentMinIndex = -1;
+ for(var i in xrefEntries) {
+ if(xrefEntries[i].offset > currentOffset) {
+ if(xrefEntries[i].offset < currentMin) {
+ currentMin = xrefEntries[i].offset;
+ currentMinIndex = i;
+ }
+ }
+ }
+ if(currentMinIndex === -1) {
+ return current;
+ }
+ return xrefEntries[currentMinIndex];
}
function updateArray(array, pos, str) {
- const upd = stringToUint8Array(str);
- for (let i = 0, len = upd.length; i < len; i++) {
- array[i + pos] = upd[i];
- }
- return array;
+ var upd = stringToUint8Array(str);
+ for (var i = 0, len=upd.length; i < len; i++) {
+ array[i+pos] = upd[i];
+ }
+ return array;
}
function copyToEnd(array, from, to) {
- const buf = new Uint8Array(array.length + (to - from));
- for (let i = 0, len = array.length; i < len; i++) {
- buf[i] = array[i];
- }
+ var buf = new Uint8Array(array.length + (to - from));
+ for (var i = 0, len=array.length; i < len; i++) {
+ buf[i] = array[i];
+ }
- for (let i = 0, len = to - from; i < len; i++) {
- buf[array.length + i] = array[from + i];
- }
- return buf;
+ for (var i = 0, len=(to - from); i < len; i++) {
+ buf[array.length + i] = array[from + i];
+ }
+ return buf;
}
function insertIntoArray(array, pos, str) {
- const ins = stringToUint8Array(str);
- const buf = new Uint8Array(array.length + ins.length);
- for (let i = 0; i < pos; i++) {
- buf[i] = array[i];
- }
- for (let i = 0; i < ins.length; i++) {
- buf[pos + i] = ins[i];
- }
- for (let i = pos; i < array.length; i++) {
- buf[ins.length + i] = array[i];
- }
- return buf;
+ var ins = stringToUint8Array(str);
+ var buf = new Uint8Array(array.length + ins.length);
+ for (var i = 0; i < pos; i++) {
+ buf[i] = array[i];
+ }
+ for (var i = 0; i < ins.length; i++) {
+ buf[pos+i] = ins[i];
+ }
+ for (var i = pos; i < array.length; i++) {
+ buf[ins.length+i] = array[i];
+ }
+ return buf;
}
function stringToUint8Array(str) {
- const buf = new Uint8Array(str.length);
- for (let i = 0, strLen = str.length; i < strLen; i++) {
- buf[i] = str.charCodeAt(i);
- }
- return buf;
+ var buf = new Uint8Array(str.length);
+ for (var i=0, strLen=str.length; i<strLen; i++) {
+ buf[i] = str.charCodeAt(i);
+ }
+ return buf;
}
function uint8ArrayToString(buf, from, to) {
- if (typeof from !== 'undefined' && typeof to !== 'undefined') {
- let s = '';
- for (let i = from; i < to; i++) {
- s = s + String.fromCharCode(buf[i]);
+ if(typeof from !== 'undefined' && typeof to !== 'undefined') {
+ var s = '';
+ for (var i=from; i<to; i++) {
+ s = s + String.fromCharCode(buf[i]);
+ }
+ return s;
}
- return s;
- }
- return String.fromCharCode.apply(null, buf);
+ return String.fromCharCode.apply(null, buf);
}
-function findFreeXrefNr(xrefEntries, used) {
- used = typeof used !== 'undefined' ? used : [];
- let inc = used.length;
- for (let i = 1; i < xrefEntries.length; i++) {
- const index = used.indexOf(i);
- const entry = xrefEntries["" + i];
- if (index === -1 && (typeof entry === 'undefined' || entry.free)) {
- return i;
- }
- if (index !== -1) {
- inc--;
+
+function findFreeXrefNr(xrefEntries, used) {
+ used = typeof used !== 'undefined' ? used : [];
+ var inc = used.length;
+
+ for (var i=1;i<xrefEntries.length;i++) {
+
+ var index = used.indexOf(i);
+ var entry = xrefEntries[""+i];
+ if(index === -1 && (typeof entry === 'undefined' || entry.free)) {
+ return i;
+ }
+ if(index !== -1) {
+ inc--;
+ }
}
- }
- return xrefEntries.length + inc;
+ return xrefEntries.length + inc;
}
function find(uint8, needle, start, limit) {
- start = typeof start !== 'undefined' ? start : 0;
- limit = typeof limit !== 'undefined' ? limit : Number.MAX_SAFE_INTEGER;
-
- const search = stringToUint8Array(needle);
- let match = 0;
-
- for (let i = start; i < uint8.length && i < limit; i++) {
- if (uint8[i] === search[match]) {
- match++;
- } else {
- match = 0;
- if (uint8[i] === search[match]) {
- match++;
- }
- }
-
- if (match === search.length) {
- return (i + 1) - match;
+ start = typeof start !== 'undefined' ? start : 0;
+ limit = typeof limit !== 'undefined' ? limit : Number.MAX_SAFE_INTEGER;
+
+ var search = stringToUint8Array(needle);
+ var match = 0;
+
+ for(var i=start;i<uint8.length && i<limit;i++) {
+ if(uint8[i] === search[match]) {
+ match++;
+ } else {
+ match = 0;
+ if(uint8[i] === search[match]) {
+ match++;
+ }
+ }
+
+ if(match === search.length) {
+ return (i + 1) - match;
+ }
}
- }
- return -1;
+ return -1;
}
-
+
function findBackwards(uint8, needle, start, limit) {
- start = typeof start !== 'undefined' ? start : uint8.length;
- limit = typeof limit !== 'undefined' ? limit : Number.MAX_SAFE_INTEGER;
-
- const search = stringToUint8Array(needle);
- let match = search.length - 1;
-
- for (let i = start; i >= 0 && i < limit; i--) {
- if (uint8[i] === search[match]) {
- match--;
- } else {
- match = search.length - 1;
- if (uint8[i] === search[match]) {
- match--;
- }
- }
-
- if (match === 0) {
- return i - 1;
+ start = typeof start !== 'undefined' ? start : uint8.length;
+ limit = typeof limit !== 'undefined' ? limit : Number.MAX_SAFE_INTEGER;
+
+ var search = stringToUint8Array(needle);
+ var match = search.length - 1;
+
+ for(var i=start;i>=0 && i<limit;i--) {
+ if(uint8[i] === search[match]) {
+ match--;
+ } else {
+ match = search.length - 1;
+ if(uint8[i] === search[match]) {
+ match--;
+ }
+ }
+
+ if(match === 0) {
+ return i - 1;
+ }
}
- }
- return -1;
+ return -1;
}
-
+
function strHex(s) {
- let a = "";
- for (let i = 0; i < s.length; i++) {
- a = a + pad2(s.charCodeAt(i).toString(16));
- }
- return a;
+ var a = "";
+ for( var i=0; i<s.length; i++ ) {
+ a = a + pad2(s.charCodeAt(i).toString(16));
+ }
+ return a;
}
+
async function sha256(array) {
- const cryptoLib = getCrypto();
- const digestTmpBuf = await cryptoLib.digest({ name: "SHA-256" }, array);
- const digestTmpArray = new Uint8Array(digestTmpBuf);
- const digestTmpStr = uint8ArrayToString(digestTmpArray);
- const sha256Hex = strHex(digestTmpStr);
- return sha256Hex;
+
+ const cryptoLib = getCrypto();
+ const digestTmpBuf = await cryptoLib.digest({ name: "SHA-256" }, array);
+ const digestTmpArray = new Uint8Array(digestTmpBuf);
+ const digestTmpStr = uint8ArrayToString(digestTmpArray);
+ const sha256Hex = strHex(digestTmpStr);
+ return sha256Hex;
}
function isSigInRoot(pdf) {
- if (typeof pdf.acroForm === 'undefined') {
- return false;
- }
- return pdf.acroForm.get('SigFlags') === 3;
+ if (typeof pdf.acroForm === 'undefined') {
+ return false;
+ }
+ return pdf.acroForm.get('SigFlags') === 3;
}
function updateXrefOffset(xref, offset, offsetDelta) {
- for (const i in xref.entries) {
- if (xref.entries[i].offset >= offset) {
- xref.entries[i].offset += offsetDelta;
+ for(var i in xref.entries) {
+ if(xref.entries[i].offset >= offset) {
+ xref.entries[i].offset += offsetDelta;
+ }
}
- }
- for (const i in xref.xrefBlocks) {
- if (xref.xrefBlocks[i] >= offset) {
- xref.xrefBlocks[i] += offsetDelta;
+ for(var i in xref.xrefBlocks) {
+ if(xref.xrefBlocks[i] >= offset) {
+ xref.xrefBlocks[i] += offsetDelta;
+ }
}
- }
}
function updateXrefBlocks(xrefBlocks, offset, offsetDelta) {
- for (const i in xrefBlocks) {
- if (xrefBlocks[i].start >= offset) {
- xrefBlocks[i].start += offsetDelta;
- }
- if (xrefBlocks[i].end >= offset) {
- xrefBlocks[i].end += offsetDelta;
+ for(var i in xrefBlocks) {
+ if(xrefBlocks[i].start >= offset) {
+ xrefBlocks[i].start += offsetDelta;
+ }
+ if(xrefBlocks[i].end >= offset) {
+ xrefBlocks[i].end += offsetDelta;
+ }
}
- }
}
function updateOffset(pos, offset, offsetDelta) {
- if (pos >= offset) {
- return pos + offsetDelta;
- }
- return pos;
+ if(pos >= offset) {
+ return pos + offsetDelta;
+ }
+ return pos;
}
function round256(x) {
- return (Math.ceil(x / 256) * 256) - 1;
+ return (Math.ceil(x/256)*256) - 1;
}
/**
@@ -382,359 +387,349 @@ function round256(x) {
* mm shall be the absolute value of the offset from UT in minutes (00–59)
*/
function now(date) {
- //date = typeof date !== 'undefined' ? date : new Date();
- const yyyy = date.getFullYear().toString();
- const MM = pad2(date.getMonth() + 1);
- const dd = pad2(date.getDate());
- const hh = pad2(date.getHours());
- const mm = pad2(date.getMinutes());
- const ss = pad2(date.getSeconds());
- return yyyy + MM + dd + hh + mm + ss + createOffset(date);
+ //date = typeof date !== 'undefined' ? date : new Date();
+ var yyyy = date.getFullYear().toString();
+ var MM = pad2(date.getMonth() + 1);
+ var dd = pad2(date.getDate());
+ var hh = pad2(date.getHours());
+ var mm = pad2(date.getMinutes());
+ var ss = pad2(date.getSeconds());
+ return yyyy + MM + dd+ hh + mm + ss + createOffset(date);
}
function createOffset(date) {
- const sign = date.getTimezoneOffset() > 0 ? "-" : "+";
- const offset = Math.abs(date.getTimezoneOffset());
- const hours = pad2(Math.floor(offset / 60));
- const minutes = pad2(offset % 60);
- return sign + hours + "'" + minutes;
+ var sign = (date.getTimezoneOffset() > 0) ? "-" : "+";
+ var offset = Math.abs(date.getTimezoneOffset());
+ var hours = pad2(Math.floor(offset / 60));
+ var minutes = pad2(offset % 60);
+ return sign + hours + "'" + minutes;
}
async function newSig(pdf, root, rootSuccessor, date, signingCert, certificateChain, privateKey) {
- // {annotEntry} is the ref to the annot widget. If we enlarge the array, make sure all the offsets
- // after the modification will be updated -> xref table and startxref
- const annotEntry = findFreeXrefNr(pdf.xref.entries);
- // we'll store all the modifications we make, as we need to adjust the offset in the PDF
- const offsetForm = find(pdf.stream.bytes, '<<', root.offset, rootSuccessor.offset) + 2;
- //first we need to find the root element and add the following:
- //
- // /AcroForm<</Fields[{annotEntry} 0 R] /SigFlags 3>>
- //
- const appendAcroForm = '/AcroForm<</Fields[' + annotEntry + ' 0 R] /SigFlags 3>>';
- //before we insert the acroform, we find the right place for annotentry
-
- //we need to add Annots [x y R] to the /Type /Page section. We can do that by searching /Contents[
- const pages = pdf.catalog.catDict.get('Pages');
- //get first page, we have hidden sig, so don't bother
- const ref = pages.get('Kids')[0];
- const xref = pdf.xref.fetch(ref);
- const offsetContentEnd = xref.get('#Contents_offset');
- //we now search backwards, this is safe as we don't expect user content here
- let offsetContent = findBackwards(pdf.stream.bytes, '/Contents', offsetContentEnd);
- const appendAnnots = '/Annots[' + annotEntry + ' 0 R]\n ';
-
- //now insert string into stream
- let array = insertIntoArray(pdf.stream.bytes, offsetForm, appendAcroForm);
- //recalculate the offsets in the xref table, only update those that are affected
- updateXrefOffset(pdf.xref, offsetForm, appendAcroForm.length);
- offsetContent = updateOffset(offsetContent, offsetForm, appendAcroForm.length);
-
- array = insertIntoArray(array, offsetContent, appendAnnots);
- updateXrefOffset(pdf.xref, offsetContent, appendAnnots.length);
- offsetContent = -1; //not needed anymore, don't update when offset changes
-
- //Then add to the next free object (annotEntry)
- //add right before the xref table or stream
- //if its a table, place element before the xref table
- //
- // sigEntry is the ref to the signature content. Next we need the signature object
- const sigEntry = findFreeXrefNr(pdf.xref.entries, [annotEntry]);
-
- //
- // {annotEntry} 0 obj
- // <</F 132/Type/Annot/Subtype/Widget/Rect[0 0 0 0]/FT/Sig/DR<<>>/T(signature)/V Y 0 R>>
- // endobj
- //
- const append = annotEntry + ' 0 obj\n<</F 132/Type/Annot/Subtype/Widget/Rect[0 0 0 0]/FT/Sig/DR<<>>/T(signature' + annotEntry + ')/V ' + sigEntry + ' 0 R>>\nendobj\n\n';
-
- // we want the offset just before the last xref table or entry
- const blocks = findXrefBlocks(pdf.xref.xrefBlocks);
- let offsetAnnot = blocks[0].start;
- array = insertIntoArray(array, offsetAnnot, append);
- //no updateXrefOffset, as the next entry will be following
-
- //
- // {sigEntry} 0 obj
- // <</Contents <0481801e6d931d561563fb254e27c846e08325570847ed63d6f9e35 ... b2c8788a5>
- // /Type/Sig/SubFilter/adbe.pkcs7.detached/Location(Ghent)/M(D:20120928104114+02'00')
- // /ByteRange [A B C D]/Filter/Adobe.PPKLite/Reason(Test)/ContactInfo()>>
- // endobj
- //
-
- //the next entry goes below the above
- let offsetSig = offsetAnnot + append.length;
-
- // Both {annotEntry} and {sigEntry} objects need to be added to the last xref table. The byte range needs
- // to be adjusted. Since the signature will always be in a gap, use first an empty sig
- // to check the size, add ~25% size, then calculate the signature and place in the empty
- // space.
- const start = sigEntry + ' 0 obj\n<</Contents <';
- const dummy = await signPki(signingCert, certificateChain, privateKey, stringToUint8Array('A'), date);
- //TODO: Adobe thinks its important to have the right size, no idea why this is the case
- const crypto = new Array(round256(dummy.length * 2)).join('0');
- const middle = '>\n/Type/Sig/SubFilter/adbe.pkcs7.detached/Location()/M(D:' + now(date) + '\')\n/ByteRange ';
- let byteRange = '[0000000000 0000000000 0000000000 0000000000]';
- const end = '/Filter/Adobe.PPKLite/Reason()/ContactInfo()>>\nendobj\n\n';
- //all together
- const append2 = start + crypto + middle + byteRange + end;
- const offsetByteRange = start.length + crypto.length + middle.length;
-
- array = insertIntoArray(array, offsetSig, append2);
- updateXrefOffset(pdf.xref, offsetAnnot, append2.length + append.length);
-
- //find the xref tables, remove them and also the EOF, as we'll write a new table
- const xrefBlocks = findXrefBlocks(pdf.xref.xrefBlocks);
-
- for (const i in xrefBlocks) {
- const oldSize = array.length;
- array = removeFromArray(array, xrefBlocks[i].start, xrefBlocks[i].end);
- const length = array.length - oldSize;
- updateXrefOffset(pdf.xref, xrefBlocks[i].start, length);
-
- //check for %%EOF and remove it as well
- const offsetEOF = find(array, '%%EOF', xrefBlocks[i].start, xrefBlocks[i].start + 20);
- if (offsetEOF > 0) {
- const lengthEOF = '%%EOF'.length;
- array = removeFromArray(array, offsetEOF, offsetEOF + lengthEOF);
- updateXrefOffset(pdf.xref, offsetEOF, -lengthEOF);
- updateXrefBlocks(xrefBlocks, offsetEOF, -lengthEOF);
- offsetAnnot = updateOffset(offsetAnnot, offsetEOF, -lengthEOF);
- offsetSig = updateOffset(offsetSig, offsetEOF, -lengthEOF);
- }
- updateXrefBlocks(xrefBlocks, xrefBlocks[i].start, length);
- offsetAnnot = updateOffset(offsetAnnot, xrefBlocks[i].start, length);
- offsetSig = updateOffset(offsetSig, xrefBlocks[i].start, length);
- }
-
- const sha256Hex = await sha256(array);
-
- //add the new entries to the xref
- pdf.xref.entries[annotEntry] = {offset: offsetAnnot,
- gen: 0,
- free: false};
- pdf.xref.entries[sigEntry] = {offset: offsetSig,
- gen: 0,
- free: false};
-
- let xrefTable = createXrefTable(pdf.xref.entries);
- //also empty entries count as in the PDF spec, page 720 (example)
- xrefTable += createTrailer(pdf.xref.topDict, array.length, sha256Hex, pdf.xref.entries.length);
- array = insertIntoArray(array, array.length, xrefTable);
-
- //since we consolidate, no prev! [adjust /Prev -> rawparsing + offset]
- const from1 = 0;
- const to1 = offsetSig + start.length;
- const from2 = to1 + crypto.length;
- const to2 = (array.length - from2) - 1;
- byteRange = '[' + pad10(from1) + ' ' + pad10(to1 - 1) + ' ' + pad10(from2 + 1) + ' ' + pad10(to2) + ']';
- array = updateArray(array, offsetSig + offsetByteRange, byteRange);
- const data = removeFromArray(array, to1 - 1, from2 + 1);
- const crypto2 = await signPki(signingCert, certificateChain, privateKey, data.buffer, date);
- array = updateArray(array, to1, crypto2);
- return array;
+ // {annotEntry} is the ref to the annot widget. If we enlarge the array, make sure all the offsets
+ // after the modification will be updated -> xref table and startxref
+ var annotEntry = findFreeXrefNr(pdf.xref.entries);
+ // we'll store all the modifications we make, as we need to adjust the offset in the PDF
+ var offsetForm = find(pdf.stream.bytes, '<<', root.offset, rootSuccessor.offset) + 2;
+ //first we need to find the root element and add the following:
+ //
+ // /AcroForm<</Fields[{annotEntry} 0 R] /SigFlags 3>>
+ //
+ var appendAcroForm = '/AcroForm<</Fields['+annotEntry+' 0 R] /SigFlags 3>>';
+ //before we insert the acroform, we find the right place for annotentry
+
+ //we need to add Annots [x y R] to the /Type /Page section. We can do that by searching /Contents[
+ var pages = pdf.catalog.catDict.get('Pages');
+ //get first page, we have hidden sig, so don't bother
+ var ref = pages.get('Kids')[0];
+ var xref = pdf.xref.fetch(ref);
+ var offsetContentEnd = xref.get('#Contents_offset');
+ //we now search backwards, this is safe as we don't expect user content here
+ var offsetContent = findBackwards(pdf.stream.bytes, '/Contents', offsetContentEnd);
+ var appendAnnots = '/Annots['+annotEntry+' 0 R]\n ';
+
+ //now insert string into stream
+ var array = insertIntoArray(pdf.stream.bytes, offsetForm, appendAcroForm);
+ //recalculate the offsets in the xref table, only update those that are affected
+ updateXrefOffset(pdf.xref, offsetForm, appendAcroForm.length);
+ offsetContent = updateOffset(offsetContent, offsetForm, appendAcroForm.length);
+
+ var array = insertIntoArray(array, offsetContent, appendAnnots);
+ updateXrefOffset(pdf.xref, offsetContent, appendAnnots.length);
+ offsetContent = -1; //not needed anymore, don't update when offset changes
+
+ //Then add to the next free object (annotEntry)
+ //add right before the xref table or stream
+ //if its a table, place element before the xref table
+ //
+ // sigEntry is the ref to the signature content. Next we need the signature object
+ var sigEntry = findFreeXrefNr(pdf.xref.entries, [annotEntry]);
+
+ //
+ // {annotEntry} 0 obj
+ // <</F 132/Type/Annot/Subtype/Widget/Rect[0 0 0 0]/FT/Sig/DR<<>>/T(signature)/V Y 0 R>>
+ // endobj
+ //
+ var append = annotEntry + ' 0 obj\n<</F 132/Type/Annot/Subtype/Widget/Rect[0 0 0 0]/FT/Sig/DR<<>>/T(signature'+annotEntry+')/V '+sigEntry+' 0 R>>\nendobj\n\n';
+
+ // we want the offset just before the last xref table or entry
+ var blocks = findXrefBlocks(pdf.xref.xrefBlocks);
+ var offsetAnnot = blocks[0].start;
+ array = insertIntoArray(array, offsetAnnot, append);
+ //no updateXrefOffset, as the next entry will be following
+
+ //
+ // {sigEntry} 0 obj
+ // <</Contents <0481801e6d931d561563fb254e27c846e08325570847ed63d6f9e35 ... b2c8788a5>
+ // /Type/Sig/SubFilter/adbe.pkcs7.detached/Location(Ghent)/M(D:20120928104114+02'00')
+ // /ByteRange [A B C D]/Filter/Adobe.PPKLite/Reason(Test)/ContactInfo()>>
+ // endobj
+ //
+
+ //the next entry goes below the above
+ var offsetSig = offsetAnnot + append.length;
+
+ // Both {annotEntry} and {sigEntry} objects need to be added to the last xref table. The byte range needs
+ // to be adjusted. Since the signature will always be in a gap, use first an empty sig
+ // to check the size, add ~25% size, then calculate the signature and place in the empty
+ // space.
+ var start = sigEntry+ ' 0 obj\n<</Contents <';
+ var dummy = await sign_pki(signingCert, certificateChain, privateKey, stringToUint8Array('A'), date);
+ //TODO: Adobe thinks its important to have the right size, no idea why this is the case
+ var crypto = new Array(round256(dummy.length * 2)).join( '0' );
+ var middle = '>\n/Type/Sig/SubFilter/adbe.pkcs7.detached/Location()/M(D:'+now(date)+'\')\n/ByteRange ';
+ var byteRange = '[0000000000 0000000000 0000000000 0000000000]';
+ var end = '/Filter/Adobe.PPKLite/Reason()/ContactInfo()>>\nendobj\n\n';
+ //all together
+ var append2 = start+crypto+middle+byteRange+end;
+ var offsetByteRange = start.length+crypto.length+middle.length;
+
+ array = insertIntoArray(array, offsetSig, append2);
+ updateXrefOffset(pdf.xref, offsetAnnot, append2.length + append.length);
+
+ //find the xref tables, remove them and also the EOF, as we'll write a new table
+ var xrefBlocks = findXrefBlocks(pdf.xref.xrefBlocks);
+
+ for(var i in xrefBlocks) {
+ var oldSize = array.length;
+ array = removeFromArray(array, xrefBlocks[i].start, xrefBlocks[i].end);
+ var length = array.length - oldSize;
+ updateXrefOffset(pdf.xref, xrefBlocks[i].start, length);
+
+ //check for %%EOF and remove it as well
+ var offsetEOF = find(array, '%%EOF', xrefBlocks[i].start, xrefBlocks[i].start+20);
+ if(offsetEOF > 0) {
+ var lengthEOF = '%%EOF'.length;
+ array = removeFromArray(array, offsetEOF, offsetEOF + lengthEOF);
+ updateXrefOffset(pdf.xref, offsetEOF, -lengthEOF);
+ updateXrefBlocks(xrefBlocks, offsetEOF, -lengthEOF);
+ offsetAnnot = updateOffset(offsetAnnot, offsetEOF, -lengthEOF);
+ offsetSig = updateOffset(offsetSig, offsetEOF, -lengthEOF);
+ }
+ updateXrefBlocks(xrefBlocks, xrefBlocks[i].start, length);
+ offsetAnnot = updateOffset(offsetAnnot, xrefBlocks[i].start, length);
+ offsetSig = updateOffset(offsetSig, xrefBlocks[i].start, length);
+ }
+
+ var sha256Hex = await sha256(array);
+
+ //add the new entries to the xref
+ pdf.xref.entries[annotEntry] = {offset:offsetAnnot, gen:0, free:false};
+ pdf.xref.entries[sigEntry] = {offset:offsetSig, gen:0, free:false};
+
+ var xrefTable = createXrefTable(pdf.xref.entries);
+ //also empty entries count as in the PDF spec, page 720 (example)
+ xrefTable += createTrailer(pdf.xref.topDict, array.length, sha256Hex, pdf.xref.entries.length);
+ array = insertIntoArray(array, array.length, xrefTable);
+
+ //since we consolidate, no prev! [adjust /Prev -> rawparsing + offset]
+ var from1 = 0;
+ var to1 = offsetSig+start.length;
+ var from2 = to1 + crypto.length;
+ var to2 = (array.length - from2) - 1;
+ var byteRange = '['+pad10(from1)+' '+pad10(to1 - 1) + ' ' +pad10(from2 + 1)+ ' ' + pad10(to2) + ']';
+ array = updateArray(array, (offsetSig + offsetByteRange), byteRange);
+ var data = removeFromArray(array, to1 - 1, from2 + 1);
+ var crypto2 = await sign_pki(signingCert, certificateChain, privateKey, data.buffer, date);
+ array = updateArray(array, to1, crypto2);
+ return array;
}
async function appendSig(pdf, root, rootSuccessor, date, signingCert, certificateChain, privateKey) {
- //copy root and the entry with contents to the end
- const startRoot = pdf.stream.bytes.length + 1;
-
- let array = copyToEnd(pdf.stream.bytes, root.offset - 1, rootSuccessor.offset);
-
- //since we signed the first one, we know how the pdf has to look like:
- const offsetAcroForm = find(array, '/AcroForm<</Fields', startRoot);
- const endOffsetAcroForm = find(array, ']', offsetAcroForm);
-
- const annotEntry = findFreeXrefNr(pdf.xref.entries);
- const sigEntry = findFreeXrefNr(pdf.xref.entries, [annotEntry]);
-
- const appendAnnot = ' ' + annotEntry + ' 0 R';
- array = insertIntoArray(array, endOffsetAcroForm, appendAnnot);
-
- //we need to add Annots [x y R] to the /Type /Page section. We can do that by searching /Annots
- const pages = pdf.catalog.catDict.get('Pages');
- //get first page, we have hidden sig, so don't bother
- const contentRef = pages.get('Kids')[0];
- const xref = pdf.xref.fetch(contentRef);
- const offsetAnnotEnd = xref.get('#Annots_offset');
- //we now search ], this is safe as we signed it previously
- const endOffsetAnnot = find(array, ']', offsetAnnotEnd);
- const xrefEntry = pdf.xref.getEntry(contentRef.num);
- const xrefEntrySuccosser = findSuccessorEntry(pdf.xref.entries, xrefEntry);
- const offsetAnnotRelative = endOffsetAnnot - xrefEntrySuccosser.offset;
- const startContent = array.length;
- array = copyToEnd(array, xrefEntry.offset, xrefEntrySuccosser.offset);
- array = insertIntoArray(array, array.length + offsetAnnotRelative, appendAnnot);
-
- const startAnnot = array.length;
- const append = annotEntry + ' 0 obj\n<</F 132/Type/Annot/Subtype/Widget/Rect[0 0 0 0]/FT/Sig/DR<<>>/T(signature' + annotEntry + ')/V ' + sigEntry + ' 0 R>>\nendobj\n\n';
- array = insertIntoArray(array, startAnnot, append);
-
- const startSig = array.length;
- const start = sigEntry + ' 0 obj\n<</Contents <';
- const dummy = await signPki(signingCert, certificateChain, privateKey, stringToUint8Array('A'), date);
- //TODO: Adobe thinks its important to have the right size, no idea why this is the case
- const crypto = new Array(round256(dummy.length * 2)).join('0');
- const middle = '>\n/Type/Sig/SubFilter/adbe.pkcs7.detached/Location()/M(D:' + now(date) + '\')\n/ByteRange ';
- let byteRange = '[0000000000 0000000000 0000000000 0000000000]';
- const end = '/Filter/Adobe.PPKLite/Reason()/ContactInfo()>>\nendobj\n\n';
- //all together
- const append2 = start + crypto + middle + byteRange + end;
- array = insertIntoArray(array, startSig, append2);
-
- const sha256Hex = await sha256(array);
-
- const prev = pdf.xref.xrefBlocks[0];
- const startxref = array.length;
- const xrefEntries = [];
- xrefEntries[0] = {offset: 0,
- gen: 65535,
- free: true};
- xrefEntries[pdf.xref.topDict.getRaw('Root').num] = {offset: startRoot,
- gen: 0,
- free: false};
- xrefEntries[contentRef.num] = {offset: startContent,
- gen: 0,
- free: false};
- xrefEntries[annotEntry] = {offset: startAnnot,
- gen: 0,
- free: false};
- xrefEntries[sigEntry] = {offset: startSig,
- gen: 0,
- free: false};
- let xrefTable = createXrefTableAppend(xrefEntries);
- xrefTable += createTrailer(pdf.xref.topDict, startxref, sha256Hex, xrefEntries.length, prev);
- array = insertIntoArray(array, array.length, xrefTable);
-
- const from1 = 0;
- const to1 = startSig + start.length;
- const from2 = to1 + crypto.length;
- const to2 = (array.length - from2) - 1;
- byteRange = '[' + pad10(from1) + ' ' + pad10(to1 - 1) + ' ' + pad10(from2 + 1) + ' ' + pad10(to2) + ']';
-
- array = updateArray(array, from2 + middle.length, byteRange);
- //now sign from1-to1 / from2-to2 and update byterange
-
- const data = removeFromArray(array, to1 - 1, from2 + 1);
- const crypto2 = await signPki(signingCert, certificateChain, privateKey, data.buffer, date);
- array = updateArray(array, to1, crypto2);
- return array;
+ //copy root and the entry with contents to the end
+ var startRoot = pdf.stream.bytes.length + 1;
+
+ var array = copyToEnd(pdf.stream.bytes, root.offset - 1, rootSuccessor.offset);
+
+ //since we signed the first one, we know how the pdf has to look like:
+ var offsetAcroForm = find(array, '/AcroForm<</Fields', startRoot);
+ var endOffsetAcroForm = find(array, ']', offsetAcroForm);
+
+ var annotEntry = findFreeXrefNr(pdf.xref.entries);
+ var sigEntry = findFreeXrefNr(pdf.xref.entries, [annotEntry]);
+
+ var appendAnnot = ' ' + annotEntry + ' 0 R';
+ array = insertIntoArray(array, endOffsetAcroForm, appendAnnot);
+
+ //we need to add Annots [x y R] to the /Type /Page section. We can do that by searching /Annots
+ var pages = pdf.catalog.catDict.get('Pages');
+ //get first page, we have hidden sig, so don't bother
+ var contentRef = pages.get('Kids')[0];
+ var xref = pdf.xref.fetch(contentRef);
+ var offsetAnnotEnd = xref.get('#Annots_offset');
+ //we now search ], this is safe as we signed it previously
+ var endOffsetAnnot = find(array, ']', offsetAnnotEnd);
+ var xrefEntry = pdf.xref.getEntry(contentRef.num);
+ var xrefEntrySuccosser = findSuccessorEntry(pdf.xref.entries, xrefEntry);
+ var offsetAnnotRelative = endOffsetAnnot - xrefEntrySuccosser.offset;
+ var startContent = array.length;
+ array = copyToEnd(array, xrefEntry.offset, xrefEntrySuccosser.offset);
+ array = insertIntoArray(array, array.length + offsetAnnotRelative, appendAnnot);
+
+ var startAnnot = array.length;
+ var append = annotEntry + ' 0 obj\n<</F 132/Type/Annot/Subtype/Widget/Rect[0 0 0 0]/FT/Sig/DR<<>>/T(signature'+annotEntry+')/V '+sigEntry+' 0 R>>\nendobj\n\n';
+ array = insertIntoArray(array, startAnnot, append);
+
+ var startSig = array.length;
+ var start = sigEntry+ ' 0 obj\n<</Contents <';
+ var dummy = await sign_pki(signingCert, certificateChain, privateKey, stringToUint8Array('A'), date);
+ //TODO: Adobe thinks its important to have the right size, no idea why this is the case
+ var crypto = new Array(round256(dummy.length * 2)).join( '0' );
+ var middle = '>\n/Type/Sig/SubFilter/adbe.pkcs7.detached/Location()/M(D:'+now(date)+'\')\n/ByteRange ';
+ var byteRange = '[0000000000 0000000000 0000000000 0000000000]';
+ var end = '/Filter/Adobe.PPKLite/Reason()/ContactInfo()>>\nendobj\n\n';
+ //all together
+ var append2 = start+crypto+middle+byteRange+end;
+ array = insertIntoArray(array, startSig, append2);
+
+ var sha256Hex = await sha256(array);
+
+ var prev = pdf.xref.xrefBlocks[0];
+ var startxref = array.length;
+ var xrefEntries = [];
+ xrefEntries[0] = {offset:0, gen:65535, free:true};
+ xrefEntries[pdf.xref.topDict.getRaw('Root').num] = {offset:startRoot, gen:0, free:false};
+ xrefEntries[contentRef.num] = {offset:startContent, gen:0, free:false};
+ xrefEntries[annotEntry] = {offset:startAnnot, gen:0, free:false};
+ xrefEntries[sigEntry] = {offset:startSig, gen:0, free:false};
+ var xrefTable = createXrefTableAppend(xrefEntries);
+ xrefTable += createTrailer(pdf.xref.topDict, startxref, sha256Hex, xrefEntries.length, prev);
+ array = insertIntoArray(array, array.length, xrefTable);
+
+ var from1 = 0;
+ var to1 = startSig + start.length;
+ var from2 = to1 + crypto.length;
+ var to2 = (array.length - from2) - 1;
+ var byteRange = '['+pad10(from1)+' '+pad10(to1 - 1) + ' ' +pad10(from2 + 1)+ ' ' + pad10(to2) + ']';
+
+ array = updateArray(array, from2 + middle.length, byteRange);
+ //now sign from1-to1 / from2-to2 and update byterange
+
+ var data = removeFromArray(array, to1 - 1, from2 + 1);
+ var crypto2 = await sign_pki(signingCert, certificateChain, privateKey, data.buffer, date);
+ array = updateArray(array, to1, crypto2);
+ return array;
}
function loadPdf(pdfArray) {
- const pdf = new pdfjsCoreDocument.PDFDocument(false, pdfArray, '');
- pdf.parseStartXRef();
- pdf.parse();
- return pdf;
+ var pdf = new pdfjsCoreDocument.PDFDocument(false, pdfArray, '');
+ pdf.parseStartXRef();
+ pdf.parse();
+ return pdf;
}
+
//data must be Uint8Array
-async function signPki(signingCert, certificateChain, privateKey, data, date) {
- const crypto = getCrypto();
-
- //date = typeof date !== 'undefined' ? date : new Date();
-
- const hashAlg = "SHA-256";
-
- const digest = await crypto.digest({ name: hashAlg }, data);
-
- const signedAttr = [];
-
- signedAttr.push(new Attribute({
- type: "1.2.840.113549.1.9.3",
- values: [
- new ObjectIdentifier({ value: "1.2.840.113549.1.7.1" })
- ]
- })); // contentType
-
- signedAttr.push(new Attribute({
- type: "1.2.840.113549.1.9.4",
- values: [
- new OctetString({ valueHex: digest })
- ]
- })); // messageDigest
-
- signedAttr.push(new Attribute({
- type: "1.2.840.113549.1.9.5",
- values: [
- new UTCTime({ valueDate: date })
- ]
- })); // signingTime
-
- const cmsSignedSimpl = new SignedData({
- version: 1,
- encapContentInfo: new EncapsulatedContentInfo({
- eContentType: "1.2.840.113549.1.7.1" // "data" content type
- }),
- signerInfos: [
- new SignerInfo({
+async function sign_pki(signingCert, certificateChain, privateKey, data, date) {
+
+ const crypto = getCrypto();
+
+ //date = typeof date !== 'undefined' ? date : new Date();
+
+ const hashAlg = "SHA-256";
+
+ const digest = await crypto.digest({ name: hashAlg }, data);
+
+ const signedAttr = [];
+
+ signedAttr.push(new Attribute({
+ type: "1.2.840.113549.1.9.3",
+ values: [
+ new ObjectIdentifier({ value: "1.2.840.113549.1.7.1" })
+ ]
+ })); // contentType
+
+ signedAttr.push(new Attribute({
+ type: "1.2.840.113549.1.9.4",
+ values: [
+ new OctetString({ valueHex: digest })
+ ]
+ })); // messageDigest
+
+ signedAttr.push(new Attribute({
+ type: "1.2.840.113549.1.9.5",
+ values: [
+ new UTCTime({ valueDate: date })
+ ]
+ })); // signingTime
+
+ const cmsSignedSimpl = new SignedData({
version: 1,
- sid: new IssuerAndSerialNumber({
- issuer: signingCert.issuer,
- serialNumber: signingCert.serialNumber
+ encapContentInfo: new EncapsulatedContentInfo({
+ eContentType: "1.2.840.113549.1.7.1" // "data" content type
}),
- signedAttrs: new SignedAndUnsignedAttributes({
- type: 0,
- attributes: signedAttr
- })
- })
- ],
- certificates: certificateChain
- });
+ signerInfos: [
+ new SignerInfo({
+ version: 1,
+ sid: new IssuerAndSerialNumber({
+ issuer: signingCert.issuer,
+ serialNumber: signingCert.serialNumber
+ }),
+ signedAttrs: new SignedAndUnsignedAttributes({
+ type: 0,
+ attributes: signedAttr
+ })
+ })
+ ],
+ certificates: certificateChain
+ });
- await cmsSignedSimpl.sign(privateKey, 0, hashAlg, data.buffer);
+ const signatureBuffer = await cmsSignedSimpl.sign(privateKey, 0, hashAlg, data.buffer);
- const cmsSignedSchema = cmsSignedSimpl.toSchema(true);
+ const cmsSignedSchema = cmsSignedSimpl.toSchema(true);
- const cmsContentSimp = new ContentInfo({
- contentType: "1.2.840.113549.1.7.2",
- content: cmsSignedSchema
- });
+ const cmsContentSimp = new ContentInfo({
+ contentType: "1.2.840.113549.1.7.2",
+ content: cmsSignedSchema
+ });
- const _cmsSignedSchema = cmsContentSimp.toSchema();
+ const _cmsSignedSchema = cmsContentSimp.toSchema();
- //region Make length of some elements in "indefinite form"
- _cmsSignedSchema.lenBlock.isIndefiniteForm = true;
+ //region Make length of some elements in "indefinite form"
+ _cmsSignedSchema.lenBlock.isIndefiniteForm = true;
- const block1 = _cmsSignedSchema.valueBlock.value[1];
- block1.lenBlock.isIndefiniteForm = true;
+ const block1 = _cmsSignedSchema.valueBlock.value[1];
+ block1.lenBlock.isIndefiniteForm = true;
- const block2 = block1.valueBlock.value[0];
- block2.lenBlock.isIndefiniteForm = true;
+ const block2 = block1.valueBlock.value[0];
+ block2.lenBlock.isIndefiniteForm = true;
- //endregion
+ //endregion
- const cmsSignedBuffer = _cmsSignedSchema.toBER(false);
+ let cmsSignedBuffer = _cmsSignedSchema.toBER(false);
- const cmsSignedArray = new Uint8Array(cmsSignedBuffer);
- const cmsSignedString = uint8ArrayToString(cmsSignedArray);
- const hex = strHex(cmsSignedString);
- return hex;
+ const cmsSignedArray = new Uint8Array(cmsSignedBuffer);
+ const cmsSignedString = uint8ArrayToString(cmsSignedArray);
+ const hex = strHex(cmsSignedString);
+ return hex;
}
-async function signPdfObjects(pdfRaw, signingCert, certificateChain, privateKey, date) {
- date = typeof date !== 'undefined' ? date : new Date();
- if (pdfRaw instanceof ArrayBuffer) {
- pdfRaw = new Uint8Array(pdfRaw);
- }
- const pdf = loadPdf(pdfRaw);
- const root = findRootEntry(pdf.xref);
- const rootSuccessor = findSuccessorEntry(pdf.xref.entries, root);
- if (!isSigInRoot(pdf)) {
- return await newSig(pdf, root, rootSuccessor, date, signingCert, certificateChain, privateKey);
- } else {
- return await appendSig(pdf, root, rootSuccessor, date, signingCert, certificateChain, privateKey);
- }
+
+async function signPdfObjects (pdfRaw, signingCert, certificateChain, privateKey, date) {
+ date = typeof date !== 'undefined' ? date : new Date();
+ if(pdfRaw instanceof ArrayBuffer) {
+ pdfRaw = new Uint8Array(pdfRaw);
+ }
+ var pdf = loadPdf(pdfRaw);
+ var root = findRootEntry(pdf.xref);
+ var rootSuccessor = findSuccessorEntry(pdf.xref.entries, root);
+ if(!isSigInRoot(pdf)) {
+ return await newSig(pdf, root, rootSuccessor, date, signingCert, certificateChain, privateKey);
+ } else {
+ return await appendSig(pdf, root, rootSuccessor, date, signingCert, certificateChain, privateKey);
+ }
}
+
export function signPdf(pdfRaw, signingCert, certificateChain, privateKey) {
- const signingCertObj = parseCertificate(signingCert);
- const certificateChainObj = [];
- certificateChainObj[0] = parseCertificate(signingCert);
- for (let i = 0; i < certificateChain.length; i++) {
- certificateChainObj[i + 1] = parseCertificate(certificateChain[i]);
- }
+ const signingCertObj = parseCertificate(signingCert);
+ const certificateChainObj = [];
+ certificateChainObj[0] = parseCertificate(signingCert);
+ for (let i = 0; i < certificateChain.length; i++) {
+ certificateChainObj[i + 1] = parseCertificate(certificateChain[i])
+ }
- return parsePrivateKey(privateKey).then(privateKeyDecoded => {
- return signPdfObjects(pdfRaw, signingCertObj, certificateChainObj, privateKeyDecoded);
- });
-}
+ return parsePrivateKey(privateKey).then(privateKeyDecoded => {
+ return signPdfObjects(pdfRaw, signingCertObj, certificateChainObj, privateKeyDecoded);
+ });
+}
\ No newline at end of file