Exemplo n.º 1
0
func ExampleV4Signer() {
	// Get auth from env vars
	auth, err := aws.EnvAuth()
	if err != nil {
		fmt.Println(err)
	}

	// Create a signer with the auth, name of the service, and aws region
	signer := aws.NewV4Signer(auth, "dynamodb", aws.USEast)

	// Create a request
	req, err := http.NewRequest("POST", aws.USEast.DynamoDBEndpoint, strings.NewReader("sample_request"))
	if err != nil {
		fmt.Println(err)
	}

	// Date or x-amz-date header is required to sign a request
	req.Header.Add("Date", time.Now().UTC().Format(http.TimeFormat))

	// Sign the request
	signer.Sign(req)

	// Issue signed request
	http.DefaultClient.Do(req)
}
Exemplo n.º 2
0
// queryV4Signprepares and runs the req request, signed with aws v4 signatures.
// If resp is not nil, the XML data contained in the response
// body will be unmarshalled on it.
func (s3 *S3) queryV4Sign(req *request, resp interface{}) error {
	if req.headers == nil {
		req.headers = map[string][]string{}
	}

	err := s3.setBaseURL(req)
	if err != nil {
		return err
	}

	hreq, err := s3.setupHttpRequest(req)
	if err != nil {
		return err
	}

	// req.Host must be set for V4 signature calculation
	hreq.Host = hreq.URL.Host

	signer := aws.NewV4Signer(s3.Auth, "s3", s3.Region)
	signer.IncludeXAmzContentSha256 = true
	signer.Sign(hreq)

	_, err = s3.doHttpRequest(hreq, resp)
	return err
}
Exemplo n.º 3
0
func (s *V4SignerSuite) TestCases(c *check.C) {
	signer := aws.NewV4Signer(s.auth, "host", s.region)

	for _, testCase := range s.cases {

		req, err := http.NewRequest(testCase.request.method, "http://"+testCase.request.host+testCase.request.url, strings.NewReader(testCase.request.body))
		c.Assert(err, check.IsNil, check.Commentf("Testcase: %s", testCase.label))
		for _, v := range testCase.request.headers {
			h := strings.SplitN(v, ":", 2)
			req.Header.Add(h[0], h[1])
		}
		req.Header.Set("host", req.Host)

		t := signer.RequestTime(req)

		canonicalRequest := signer.CanonicalRequest(req)
		c.Check(canonicalRequest, check.Equals, testCase.canonicalRequest, check.Commentf("Testcase: %s", testCase.label))

		stringToSign := signer.StringToSign(t, canonicalRequest)
		c.Check(stringToSign, check.Equals, testCase.stringToSign, check.Commentf("Testcase: %s", testCase.label))

		signature := signer.Signature(t, stringToSign)
		c.Check(signature, check.Equals, testCase.signature, check.Commentf("Testcase: %s", testCase.label))

		authorization := signer.Authorization(req.Header, t, signature)
		c.Check(authorization, check.Equals, testCase.authorization, check.Commentf("Testcase: %s", testCase.label))

		signer.Sign(req)
		c.Check(req.Header.Get("Authorization"), check.Equals, testCase.authorization, check.Commentf("Testcase: %s", testCase.label))
	}
}
Exemplo n.º 4
0
// prepare sets up req to be delivered to S3.
func (s3 *S3) prepare(req *request) error {
	// Copy so they can be mutated without affecting on retries.
	params := make(url.Values)
	headers := make(http.Header)
	for k, v := range req.params {
		params[k] = v
	}
	for k, v := range req.headers {
		headers[k] = v
	}
	req.params = params
	req.headers = headers

	if !req.prepared {
		req.prepared = true
		if req.method == "" {
			req.method = "GET"
		}

		if !strings.HasPrefix(req.path, "/") {
			req.path = "/" + req.path
		}

		err := s3.setBaseURL(req)
		if err != nil {
			return err
		}
	}

	if s3.Signature == aws.V2Signature && s3.Auth.Token() != "" {
		req.headers["X-Amz-Security-Token"] = []string{s3.Auth.Token()}
	} else if s3.Auth.Token() != "" {
		req.params.Set("X-Amz-Security-Token", s3.Auth.Token())
	}

	if s3.Signature == aws.V2Signature {
		// Always sign again as it's not clear how far the
		// server has handled a previous attempt.
		u, err := url.Parse(req.baseurl)
		if err != nil {
			return err
		}

		signpathPartiallyEscaped := partiallyEscapedPath(req.path)
		if strings.IndexAny(s3.Region.S3BucketEndpoint, "${bucket}") >= 0 {
			signpathPartiallyEscaped = "/" + req.bucket + signpathPartiallyEscaped
		}
		req.headers["Host"] = []string{u.Host}
		req.headers["Date"] = []string{time.Now().In(time.UTC).Format(time.RFC1123)}

		sign(s3.Auth, req.method, signpathPartiallyEscaped, req.params, req.headers)
	} else {
		hreq, err := s3.setupHttpRequest(req)
		if err != nil {
			return err
		}

		hreq.Host = hreq.URL.Host
		signer := aws.NewV4Signer(s3.Auth, "s3", s3.Region)
		signer.IncludeXAmzContentSha256 = true
		signer.Sign(hreq)

		req.payload = hreq.Body
		if _, ok := headers["Content-Length"]; ok {
			req.headers["Content-Length"] = headers["Content-Length"]
		}
	}
	return nil
}