Here is a PUT request using Signature Version 4 If anyone need it:

//User Variables
    String key = '{Access Key}'; 			//Your AWS key
    String secret = '{Secret Key}'; 		//Your AWS Secret key
    String method = 'PUT';					//Method you are useing, Note: Other methods may be different. 
    String bucketname = '{Bucket Name}'; 	//Your AWS bucket name.
    String region = '{Region}';				//Your AWS region name.
    String service = 's3';					//S3 is the Aws Service You are using.
    String host = bucketname+'.'+service+'.'+region+'.amazonaws.com';//Where you are posting the object.
    String filename = '{File Name}';		//File Name with no spaces! If th File Name has spaces or other unique char it will need to be Uri Encoded
    String fileType = '{File Type}';		//Type of File (i.e., application/pdf, image/jpeg, text/plain)
    Blob fileBlob = '{File contents as Blob}';	//Binary of the File.


    //Current Date and Time formatted in different ways.
    String longDate = Datetime.now().formatGMT('yyyyMMdd\'T\'HHmmss\'Z\'');
    String shortDate = Datetime.now().formatGMT('yyyyMMdd');
    String formattedDateString = Datetime.now().formatGMT('E, dd MMM yyyy HH:mm:ss z');


    //Variables User in the Signiture Process
    String algorithmName = 'HmacSHA256';
    String algorithmUsed = 'AWS4-HMAC-SHA256';
    String headersInSigniture = 'date;host;x-amz-content-sha256;x-amz-date';


    //Calculated Variables
    String url = 'https://' + bucketname + '.' + service + '.' + region + '.amazonaws.com' + '/' + filename;
    Blob paylodHashing = Crypto.generateDigest('SHA-256', fileBlob);
    String hashedPaylod = EncodingUtil.convertToHex(paylodHashing);
    String credential = key +'/'+ shortDate +'/'+ region +'/'+ service +'/aws4_request';    


    //Create Canonical Request String, Hash it, then convert to hex.
    String canonicalRequest  = 	method + '\n' + 
                    '/'+ filename + '\n' + 
                    '\n' +		//If you want to add a Path do so here, just like the filename (this will need to be Uri Encoded)
                    'date:'+ formattedDateString + '\n' +
                    'host:'+ host + '\n' +
                    'x-amz-content-sha256:'+ hashedPaylod + '\n'+
                    'x-amz-date:'+ longDate + '\n'+
                    '\n' + 
                    headersInSigniture + '\n' + 
                    hashedPaylod;

    Blob canonicalHash = Crypto.generateDigest('SHA-256', Blob.valueof(canonicalRequest));
    String canonicalHashString = EncodingUtil.convertToHex(canonicalHash);


    //Create String To Sign String, Hash it, then convert to hex.
    String stringToSign = 	algorithmUsed + '\n' + 
                  longDate + '\n' + 
                  shortDate +'/'+ region +'/'+ service +'/aws4_request' + '\n' +
                  canonicalHashString;


    //Create Signing Key by Hashing, then convert to hex.
    Blob KDate = Crypto.generateMac(algorithmName, Blob.valueof(shortDate), Blob.valueof('AWS4'+ secret));
    Blob kRegion = Crypto.generateMac(algorithmName, Blob.valueof(region), KDate);
    Blob kService = Crypto.generateMac(algorithmName, Blob.valueof(service), kRegion);
    Blob signingKey = Crypto.generateMac(algorithmName, Blob.valueof('aws4_request'), kService);


    //Create the signature by Hashing the String To Sign and Signing Key together.
    Blob blobSignature = Crypto.generateMac(algorithmName, Blob.valueof(stringToSign), signingKey);
    String signature = EncodingUtil.convertToHex(blobSignature);       


    //Create the Http Request.
    HttpRequest req = new HttpRequest();
    req.setMethod(method);
    req.setEndpoint(url);
    req.setHeader('Authorization', algorithmUsed +' Credential='+ credential +',SignedHeaders='+     headersInSigniture +',Signature='+ signature);
    req.setHeader('date', formattedDateString);
    req.setHeader('host', host);
    req.setHeader('x-amz-content-sha256', hashedPaylod);
    req.setHeader('x-amz-date', longDate);
    req.setHeader('content-type', fileType);
    //If you want to add more header Here be sure to add them to the canonicalRequest and headersInSigniture String.
    req.setBodyAsBlob(fileBlob);


    //Submit the Request.
    Http http = new Http();
    HTTPResponse res = http.send(req);
    if (res.getStatusCode() == 200) {
        system.debug(res.getBody());
    }else{
        system.debug(res.getBody());
    }