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Are There Any Tools Built in to Verify Md5 or Sha1 Checksums of Downloaded Software?

Summary

The File Checksum Integrity Verifier (FCIV) is a command-prompt utility that computes and verifies cryptographic hash values of files. FCIV can compute MD5 or SHA-1 cryptographic hash values. These values tin be displayed on the screen or saved in an XML file database for later use and verification.

File Checksum Integrity Verifier

• INTRODUCTION

• Features

• Installation

• Usage

• Database storage format

• Verification

INTRODUCTION

This article discusses the File Checksum Integrity Verifier (FCIV) utility.

Alarm The Microsoft File Checksum Integrity Verifier (FCIV) utility is an unsupported command-line utility that computes MD5 or SHA1 cryptographic hashes for files. Microsoft does not provide support for this utility. Use this utility at your ain risk. Microsoft Product Support Services (PSS) cannot answer questions about the File Checksum Integrity Verifier utility.

The File Checksum Integrity Verifier (FCIV) utility tin generate MD5 or SHA-one hash values for files to compare the values against a known good value. FCIV can compare hash values to make sure that the files accept not been inverse.

With the FCIV utility, y'all can also compute hashes of all your critical files and salvage the values in an XML file database. If you doubtable that your estimator may accept been compromised, and important files have been changed, you can run a verification of the file organization files against the XML database to determine which files take been modified.

The FCIV utility runs on Microsoft Windows 2000, Windows XP, and Windows Server 2003.

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Features

The FCIV utility has the following features:

• Supports MD5 or SHA1 hash algorithms (The default is MD5.)

• Can output hash values to the panel or store the hash value and file name in an XML file

• Tin recursively generate hash values for all files in a directory and in all subdirectories (for example, fciv.exe c:\ -r)

• Supplies an exception listing to specify files or directories to hash

• Tin can shop hash values for a file with or without the full path of the file

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Installation

To obtain the FCIV utility, follow these steps:

1. In Windows Explorer, create a new folder that is named FCIV.

2. The post-obit file is bachelor for download from the Microsoft Download Center:

   Download the File Checksum Integrity Verifier utility bundle now.
   Release Date: May 17, 2004

   For additional information about how to download Microsoft Back up files, click the post-obit article number to view the article in the Microsoft Cognition Base of operations:

   119591 How to Obtain Microsoft Back up Files from Online Services Microsoft scanned this file for viruses. Microsoft used the most electric current virus-detection software that was bachelor on the appointment that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.

3. In the File Download dialog box, click Salve, and so save the file to the FCIV folder that you lot created in step one.

4. When the download is completed, click Shut.

5. In the FCIV folder, double-click Windows-KB841290-x86-ENU.exe.

6. Click Yes to take the license agreement.

7. Click Browse, click the FCIV folder, and and then click OK.

8. Click OK to extract the files.

9. When the file extraction is completed, click OK.

10. Add the FCIV folder to the organisation path.

11. To commencement a command prompt, click Start, click Run, blazon cmd in the Open box, and then click OK.

12. Blazon fciv.exe /?, and and so press ENTER.

Note If FCIV was installed to the C:\FCIV directory, type gear up path=%path%;c:\fciv to add it to the system path in a command trounce.

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Usage

Syntax

fciv.exe [Commands] <Options>

Commands

• -add file | dir : Compute the hash and send information technology to an output device (default screen). The dir parameter has the following options:

  • -r: Recursive.

  • -type: Specify file type. For example, -type *.exe.

  • -exc file: Do not compute these directories.

  • -wp: Exercise non store the full path name. (Past default, FCIV stores the full path name.)

  • -bp: Remove the base path from the path name of each entry.

• -list: List entries in the database.

• -5: Verify hashes. The -v option has the following selection:

  • -bp: Remove the base path from the path name of each entry.

• -?, -h, or -assistance: Open up extended assistance.

Options

• -md5, -sha1, or -both: Specify hash type. (By default, MCIV uses -md5.)

• -xml db: Specify database format and proper name.

  Note When you lot use the -five option to verify a hash, FCIV as well sends a return fault code to indicate whether a hash is verified. A zero (0) indicates success, and a 1 indicates failure. With the return fault code, you can use FCIV in automated scripts to verify hashes.

Example usage

• To brandish the MD5 hash of a file, type the following command at a command prompt:

  fciv.exe filename Note filename is the name of the file.

• To compute a hash of a file, type a command line that is similar to whatever one of the following command lines:

  fciv.exe c:\mydir\ myfile.dll

  fciv.exe c:\ -r -exc exceptions.txt -sha1 -xml dbsha.xml

  fciv.exe c:\mydir -blazon *.exe

  fciv.exe c:\mydir -wp -both -xml db.xml

• To list the hashes that are stored in a database, type a command line that is similar to the following command line:

  fciv.exe -list -sha1 -xml db.xml

• To verify a hash in a file, type a command line that is similar to any one of the following control lines:

  fciv.exe -five -sha1 -xml db.xml

  fciv.exe -v -bp c:\mydir -sha1 -xml db.xml

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Database storage format

The File Checksum Integrity Verifier (FCIV) utility can store entries in an XML database file. When FCIV is configured to store hash values in an XML database file, the hexadecimal hash values are stored in base64 encoded format. When yous view the XML database directly, the base64 encoded representation of the hash value does not visually match the hexadecimal value that the console displays. FCIV decodes the base64 encoded hashes when information technology displays the contents of the database to the screen. Therefore, it displays the correct hexadecimal value.

The post-obit example shows how FCIV computes the MD5 hash value for Ntdll.dll and displays it at the command prompt:

C:\WINDOWS\system32>fciv -add ntdll.dll // // File Checksum Integrity Verifier version ii.05. // 6cbfd919baa7c9e03c8471ae4d8f8bb0 ntdll.dll                

Here is the hash value for the same file that is base64 encoded and stored in an XML file past using the following command:

C:\WINDOWS\system32>fciv -add ntdll.dll -xml c:\temp\ntdll.xml

<?XML version="1.0" encoding="utf-8"?> <FCIV> <FILE_ENTRY><proper name>ntdll.dll</name><MD5>bL/ZGbqnyeA8hHGuTY+LsA==</MD5></FILE_ENTRY></FCIV>                

Hither is the value that appears in the XML file that uses FCIV to list the contents.

Annotation It matches the value that was computed in the beginning example.

C:\WINDOWS\system32>fciv -listing -XML c:\temp\ntdll.XML // // File Checksum Integrity Verifier version 2.05. // Listing entries in database: ----------------------------                  MD5                             Filename ------------------------------------------------------------------------- 6cbfd919baa7c9e03c8471ae4d8f8bb0 ntdll.dll  Number of entries found: one                

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Verification

How to generate and verify hash values for a Microsoft Download

• Download the file to a temporary directory (such equally C:\Temp).

• To extract the contents of the file, utilise the /x switch. Specify an output directory for the extracted files when you are prompted (such as C:\Temp\Files).

  You tin can too use the /extract switch to extract the files without starting Setup.

  For additional information about the /extract switch, click the following commodity number to view the article in the Microsoft Cognition Base of operations:

  262841 Control-Line switches for Windows software update packages
  The security update may be an IExpress packet. If it is, see the following commodity in the Microsoft Cognition Base of operations about how to excerpt an IExpress package:
  

  197147 Control-line switches for IExpress software update packages
  

• To create a database for a single file and to relieve it to the C:\Temp directory, blazon the post-obit command:

  fciv.exe -add c:\temp\files\filename.dll -wp c:\temp\files -XML c:\temp\filename.XML

• To verify the contents of the XML database confronting an installed file, type the post-obit command:

  fciv.exe -v -bp c:\installeddirectory -XML c:\temp\filename.XML Notation installeddirectory is the location of the installed file.

  Note When you lot use the -v option to verify a hash, FCIV also provides a return error code to point success (0) or failure (1) to verify a hash. Considering of the render error code, you tin can use FCIV in automated scripts to verify hashes.

• FCIV will ostend at the console if the hash values for the file matches the values that are stored in the XML database.

How to verify the hash values for the files in the Windows directory and in all sub-directories

You tin also build a hash database of your sensitive files and verify them regularly.

• To create the database and to save it to the C:\Temp directory, type the following command:

  fciv.exe -add together %systemroot% -r -XML c:\temp\windows-hashes.XML

• To list the contents of the database to the console, blazon the post-obit command:

  fciv.exe -list -XML c:\temp\windows-hashes.XML

• To verify the contents of the XML database against the current file system files, type the following command:

  fciv -v -XML c:\temp\windows-hashes.XML

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Need more than help?

Are There Any Tools Built in to Verify Md5 or Sha1 Checksums of Downloaded Software?

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Source: https://support.microsoft.com/en-gb/topic/d92a713f-d793-7bd8-b0a4-4db811e29559#:~:text=The%20File%20Checksum%20Integrity%20Verifier%20(FCIV)%20utility%20can%20generate%20MD5,files%20have%20not%20been%20changed.

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