officecrypto-tool - npm Package Compare versions

Comparing version 0.0.7 to 0.0.8

index.js

@@ -11,4 +11,4 @@ /* eslint-disable valid-jsdoc */
 const doc97File = require('./src/util/doc97');
+const ppt97File = require('./src/util/ppt97');
 
-
 /**
@@ -80,2 +80,8 @@ *
 
+  const PowerPointBook = CFB.find(cfb, 'PowerPoint Document');
+  if (PowerPointBook) {
+    output = ppt97File.decrypt(cfb, PowerPointBook.content, password, input);
+    return output;
+  }
+
   if (!encryptionInfo) return input; // Not encrypted returns directly to the original buffer
@@ -159,2 +165,19 @@
 
+  const PowerPointBook = CFB.find(cfb, 'PowerPoint Document');
+  if (PowerPointBook) {
+    let blob = PowerPointBook.content;
+    if (!Buffer.isBuffer(blob)) blob = Buffer.from(blob);
+
+    const CurrentUser = CFB.find(cfb, 'Current User');
+    let currentUserBlob = CurrentUser.content;
+    if (!Buffer.isBuffer(currentUserBlob)) currentUserBlob = Buffer.from(currentUserBlob);
+
+    const currentUser = ppt97File.parseCurrentUser(currentUserBlob);
+    blob.l = currentUser.currentUserAtom.offsetToCurrentEdit;
+    const userEditAtom = ppt97File.parseUserEditAtom(blob);
+    if (userEditAtom.rh.recLen === 0x00000020) {
+      return true;
+    }
+  }
+
   return false;
@@ -161,0 +184,0 @@ }

package.json

 {
   "name": "officecrypto-tool",
-  "version": "0.0.7",
+  "version": "0.0.8",
   "description": "officeCrypto is a library for node.js that can be used to decrypt and encrypt excel files.",
@@ -5,0 +5,0 @@ "keywords": [

README.md

@@ -9,3 +9,3 @@ # officecrypto-tool
 
-Now it supports encryption and decryption of` MS office and WPS files`, Support doc docx xls xlsx pptx decryption, support docx xlsx pptx encryption.
+Now it supports encryption and decryption of` MS office and WPS files`, Support `doc docx xls xlsx ppt pptx` decryption, support `docx xlsx pptx` encryption.
 
@@ -77,3 +77,3 @@ ## Contents
   * [x] MS-XLS (Excel 2002, 2003, 2004) (experimental)
-  * [] MS-PPT (PowerPoint 2002, 2003, 2004) (partial, experimental)
+  * [x] MS-PPT (PowerPoint 2002, 2003, 2004) (partial, experimental)
 * [x] Office Binary Document RC4
@@ -80,0 +80,0 @@ * [x] MS-DOC (Word 97, 98, 2000)

src/crypto/rc4_cryptoapi.js

@@ -42,6 +42,5 @@ /* eslint-disable valid-jsdoc */
  */
-exports.decrypt = function decrypt(password, salt, KeySize, input, blocksize = 0x200) {
+exports.decrypt = function decrypt(password, salt, KeySize, input, blocksize = 0x200, block = 0) {
   let start = 0;
   let end = 0;
-  let block = 0;
   let key = convertPasswordToKey(password, salt, KeySize, block);
@@ -48,0 +47,0 @@

test.js

@@ -11,5 +11,14 @@
 
-  const input = await fs.readFile(`${filePath}/xor_pass_length_5_test.xls`);
-  const output = await officeCrypto.decrypt(input, {password: 'xxxxx'});
-  await fs.writeFile(`${filePath}/xor_pass_length_5_out_success.xls`, output);
+  // const input = await fs.readFile(`${filePath}/xor_pass_length_5_test.xls`);
+  // const output = await officeCrypto.decrypt(input, {password: 'xxxxx'});
+  // await fs.writeFile(`${filePath}/xor_pass_length_5_out_success.xls`, output);
+
+  // const input = await fs.readFile(`${filePath}/rc4_pass.ppt`);
+  // const output = await officeCrypto.decrypt(input, {password: '123456'});
+  // await fs.writeFile(`${filePath}/rc4_out_success.ppt`, output);
+
+  // const input = await fs.readFile(`${filePath}/rc4_pass.ppt`);
+  const input = await fs.readFile(`${filePath}/rc4_out_success.ppt`);
+  const isEncrypted = officeCrypto.isEncrypted(input);
+  console.log('isEncrypted-->', isEncrypted);
 })();

tests/rc4_crypto_api/decrypt.test.js

@@ -25,2 +25,9 @@
 
+  it('decrypt ppt success', async () => {
+    const input = await fs.readFile(`${filePath}/rc4_pass.ppt`);
+    const output = await officeCrypto.decrypt(input, {password: '123456'});
+    await fs.writeFile(`${filePath}/rc4_out_success.ppt`, output);
+    // expect(200).toEqual(200);
+  });
+
   it('decrypt unencrypted doc success', async () => {
@@ -56,2 +63,13 @@ const input = await fs.readFile(`${encryptFilePath}/doc_wait_for_encrypt.doc`);
   });
+
+
+  it('decrypt rc4_crypto_api ppt, the password is incorrect', async () => {
+    const test = function test() {
+      return async function() {
+        const input = await fs.readFile(`${filePath}/rc4_pass.ppt`);
+        const output = await officeCrypto.decrypt(input, {password: 'xxxxx'});
+      };
+    };
+    await expect(test()).rejects.toThrowError(new Error( `The password is incorrect` ));
+  });
 });

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Improved metrics

Total package byte prevSize

799040

increased by31.89%

Number of package files

59

increased by9.26%

Lines of code

3055

increased by16.6%

Worsened metrics

Number of low supply chain risk alerts

11

increased by10%

No dependency changes