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<html>
'use strict';

var crypto = require('crypto');

function sha1(bytes) {
	// support modern Buffer API
	if (typeof Buffer.from === 'function') {
		if (Array.isArray(bytes)) bytes = Buffer.from(bytes);
		else if (typeof bytes === 'string') bytes = Buffer.from(bytes, 'utf8');
	}

	// support pre-v4 Buffer API
	else {
		if (Array.isArray(bytes)) bytes = new Buffer(bytes);
		else if (typeof bytes === 'string') bytes = new Buffer(bytes, 'utf8');
	}

	return crypto.createHash('sha1').update(bytes).digest();
}

module.exports = sha1;