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This commit is contained in:
Andy Wang 2019-09-26 19:47:42 +01:00
parent b1edcffcc0
commit 3c5192c2bf
2 changed files with 37 additions and 37 deletions
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40
src/core/operations/DESDecrypt.mjs
View file

@ -64,8 +64,8 @@ class DESDecrypt extends Operation {
*/
run(input, args) {
const key = Utils.convertToByteString(args[0].string, args[0].option),
iv = Utils.convertToByteArray(args[1].string, args[1].option),
[,, mode, inputType, outputType] = args;
var iv = Utils.convertToByteArray(args[1].string, args[1].option)
if (key.length !== 8) {
throw new OperationError(`Invalid key length: ${key.length} bytes
@ -77,36 +77,36 @@ Triple DES uses a key length of 24 bytes (192 bits).`);
input = Utils.convertToByteString(input, inputType);
const decipher = forge.cipher.createDecipher("DES-" + mode, key);
var result
let result;
if (mode === "CTR"){
if (mode === "CTR") {
// Temp workaround until https://github.com/digitalbazaar/forge/issues/721 is fixed
const blockSize = decipher.mode.blockSize
var blockOutputs = forge.util.createBuffer();
var numBlocks = input.length % blockSize === 0 ? input.length >> 3 : (input.length >> 3) + 1
const blockSize = decipher.mode.blockSize;
const blockOutputs = forge.util.createBuffer();
const numBlocks = input.length % blockSize === 0 ? input.length >> 3 : (input.length >> 3) + 1;
if (iv.length < blockSize) {
var ivLen = iv.length
for (var i=0; i < blockSize - ivLen; i++){
iv.unshift(0)
const ivLen = iv.length;
for (let i=0; i < blockSize - ivLen; i++) {
iv.unshift(0);
}
}
for (var i=0; i < numBlocks; i++) {
decipher.start({iv: iv})
decipher.update(forge.util.createBuffer().fillWithByte(0,blockSize))
blockOutputs.putBuffer(decipher.output)
iv[iv.length-1] = (iv[iv.length-1] + 1) & 0xFFFFFFFF
for (let j=0; j < numBlocks; j++) {
decipher.start({iv: iv});
decipher.update(forge.util.createBuffer().fillWithByte(0, blockSize));
blockOutputs.putBuffer(decipher.output);
iv[iv.length-1] = (iv[iv.length-1] + 1) & 0xFFFFFFFF;
}
var output = forge.util.createBuffer()
for (var i=0; i < input.length; i++) {
output.putByte(input.charCodeAt(i)^blockOutputs.getByte())
const output = forge.util.createBuffer();
for (let k=0; k < input.length; k++) {
output.putByte(input.charCodeAt(k)^blockOutputs.getByte());
}
result = true
decipher.output = output
result = true;
decipher.output = output;
} else {
decipher.start({iv: iv});
decipher.update(forge.util.createBuffer(input));
result = decipher.finish();
result = decipher.finish();
}
if (result) {

34
src/core/operations/DESEncrypt.mjs
View file

@ -64,8 +64,8 @@ class DESEncrypt extends Operation {
*/
run(input, args) {
const key = Utils.convertToByteString(args[0].string, args[0].option),
iv = Utils.convertToByteArray(args[1].string, args[1].option),
[,, mode, inputType, outputType] = args;
var iv = Utils.convertToByteArray(args[1].string, args[1].option)
if (key.length !== 8) {
throw new OperationError(`Invalid key length: ${key.length} bytes
@ -78,29 +78,29 @@ Triple DES uses a key length of 24 bytes (192 bits).`);
const cipher = forge.cipher.createCipher("DES-" + mode, key);
if (mode === "CTR"){
if (mode === "CTR") {
// Temp workaround until https://github.com/digitalbazaar/forge/issues/721 is fixed
const blockSize = cipher.mode.blockSize
var blockOutputs = forge.util.createBuffer();
var numBlocks = input.length % blockSize === 0 ? input.length >> 3 : (input.length >> 3) + 1
const blockSize = cipher.mode.blockSize;
const blockOutputs = forge.util.createBuffer();
const numBlocks = input.length % blockSize === 0 ? input.length >> 3 : (input.length >> 3) + 1;
if (iv.length < blockSize) {
var ivLen = iv.length
for (var i=0; i < blockSize - ivLen; i++){
iv.unshift(0)
const ivLen = iv.length;
for (let i=0; i < blockSize - ivLen; i++) {
iv.unshift(0);
}
}
for (var i=0; i < numBlocks; i++) {
cipher.start({iv: iv})
cipher.update(forge.util.createBuffer().fillWithByte(0,blockSize))
blockOutputs.putBuffer(cipher.output)
iv[iv.length-1] = (iv[iv.length-1] + 1) & 0xFFFFFFFF
for (let j=0; j < numBlocks; j++) {
cipher.start({iv: iv});
cipher.update(forge.util.createBuffer().fillWithByte(0, blockSize));
blockOutputs.putBuffer(cipher.output);
iv[iv.length-1] = (iv[iv.length-1] + 1) & 0xFFFFFFFF;
}
var output = forge.util.createBuffer()
for (var i=0; i < input.length; i++) {
output.putByte(input.charCodeAt(i)^blockOutputs.getByte())
const output = forge.util.createBuffer();
for (let k=0; k < input.length; k++) {
output.putByte(input.charCodeAt(k)^blockOutputs.getByte());
}
cipher.output=output
cipher.output=output;
} else {
cipher.start({iv: iv});
cipher.update(forge.util.createBuffer(input));