SHA1 Generator Hash generators

const crypto = require('crypto');

// Generate SHA-1 hash
const text = 'Hello World';
const hash = crypto.createHash('sha1').update(text).digest('hex');
console.log(hash); // 0a4d55a8d778e5022fab701977c5d840bbc486d0

// Hash a file
const fs = require('fs');
const fileBuffer = fs.readFileSync('file.txt');
const fileHash = crypto.createHash('sha1').update(fileBuffer).digest('hex');

// Streaming for large files
const stream = fs.createReadStream('large-file.bin');
const hash = crypto.createHash('sha1');
stream.on('data', data => hash.update(data));
stream.on('end', () => console.log(hash.digest('hex')));

import hashlib

# Generate SHA-1 hash
text = "Hello World"
hash_object = hashlib.sha1(text.encode())
hex_dig = hash_object.hexdigest()
print(hex_dig)  # 0a4d55a8d778e5022fab701977c5d840bbc486d0

# Hash a file
def hash_file(filename):
    sha1 = hashlib.sha1()
    with open(filename, 'rb') as f:
        while chunk := f.read(8192):
            sha1.update(chunk)
    return sha1.hexdigest()

file_hash = hash_file('document.pdf')
print(f"SHA-1: {file_hash}")

// Generate SHA-1 hash
$text = "Hello World";
$hash = sha1($text);
echo $hash; // 0a4d55a8d778e5022fab701977c5d840bbc486d0

// Hash with raw output (binary)
$binaryHash = sha1($text, true);
$hexHash = bin2hex($binaryHash);

// Hash a file
$fileHash = sha1_file('document.pdf');
echo "SHA-1: " . $fileHash;

// Hash with salt (for passwords - not recommended)
$password = "userpassword";
$salt = "randomsalt";
$hash = sha1($salt . $password);

# Linux/Mac
echo -n "Hello World" | sha1sum
# 0a4d55a8d778e5022fab701977c5d840bbc486d0  -

# Hash a file
sha1sum document.pdf

# Multiple files
sha1sum *.txt > checksums.sha1

# Verify checksums
sha1sum -c checksums.sha1

# macOS
echo -n "Hello World" | shasum -a 1

# Windows (PowerShell)
Get-FileHash -Algorithm SHA1 file.txt