# Hash

## <mark style="color:red;">Using certutil (CMD)</mark>

<table data-header-hidden data-full-width="true"><thead><tr><th>Command</th><th>Description</th></tr></thead><tbody><tr><td><mark style="color:yellow;"><code>certutil -hashfile file.txt MD5</code></mark></td><td>MD5 hash of a file.</td></tr><tr><td><mark style="color:yellow;"><code>certutil -hashfile file.txt SHA1</code></mark></td><td>SHA1 hash of a file.</td></tr><tr><td><mark style="color:yellow;"><code>certutil -hashfile file.txt SHA256</code></mark></td><td>SHA256 hash of a file.</td></tr><tr><td><mark style="color:yellow;"><code>certutil -hashfile file.txt SHA384</code></mark></td><td>SHA384 hash of a file.</td></tr><tr><td><mark style="color:yellow;"><code>certutil -hashfile file.txt SHA512</code></mark></td><td>SHA512 hash of a file.</td></tr></tbody></table>

## <mark style="color:red;">ForFiles (CMD)</mark>

<table data-header-hidden data-full-width="true"><thead><tr><th>Command</th><th>Description</th></tr></thead><tbody><tr><td><mark style="color:yellow;"><code>forfiles /m &#x3C;file_pattern> /c "cmd /c certutil -hashfile @file SHA1"</code></mark></td><td>Loop through multiple files in directories and compute SHA1 hash for each file.</td></tr><tr><td><mark style="color:yellow;"><code>forfiles /m *.txt /c "cmd /c certutil -hashfile @file SHA1"</code></mark></td><td>Example of computing SHA1 hash for each .txt file in the current directory.</td></tr></tbody></table>

## <mark style="color:red;">Using Get-FileHash (PowerShell)</mark>

<table data-header-hidden data-full-width="true"><thead><tr><th>Command</th><th>Description</th></tr></thead><tbody><tr><td><mark style="color:yellow;"><code>Get-FileHash -Path file.txt -Algorithm MD5</code></mark></td><td>Computes the MD5 hash of a specified file.</td></tr><tr><td><mark style="color:yellow;"><code>Get-FileHash -Path file.txt -Algorithm SHA1</code></mark></td><td>Computes the SHA1 hash of a specified file.</td></tr><tr><td><mark style="color:yellow;"><code>Get-FileHash -Path file.txt -Algorithm SHA256</code></mark></td><td>Computes the SHA256 hash of a specified file.</td></tr><tr><td><mark style="color:yellow;"><code>Get-FileHash -Path file.txt -Algorithm SHA384</code></mark></td><td>Computes the SHA384 hash of a specified file.</td></tr><tr><td><mark style="color:yellow;"><code>Get-FileHash -Path file.txt -Algorithm SHA512</code></mark></td><td>Computes the SHA512 hash of a specified file.</td></tr></tbody></table>

## <mark style="color:red;">Hashing multiple files (PowerShell)</mark>

MD5 hash for all .txt files in a directory:

```powershell
Get-ChildItem -Path C:\path\*.txt | Get-FileHash -Algorithm MD5
```

SHA256 hash for all .txt files in a directory:

```powershell
Get-ChildItem -Path C:\path\*.txt | Get-FileHash -Algorithm SHA256
```

These commands allow you to compute hashes of files using various algorithms, providing a way to verify file integrity or uniqueness in Windows environments.