package s3api import ( "bytes" "crypto/md5" "crypto/sha256" "encoding/base64" "encoding/hex" "errors" "fmt" "io" "net/http" "net/url" "sort" "strconv" "strings" "testing" "time" "unicode/utf8" "github.com/seaweedfs/seaweedfs/weed/s3api/s3err" ) // TestIsRequestPresignedSignatureV4 - Test validates the logic for presign signature verision v4 detection. func TestIsRequestPresignedSignatureV4(t *testing.T) { testCases := []struct { inputQueryKey string inputQueryValue string expectedResult bool }{ // Test case - 1. // Test case with query key ""X-Amz-Credential" set. {"", "", false}, // Test case - 2. {"X-Amz-Credential", "", true}, // Test case - 3. {"X-Amz-Content-Sha256", "", false}, } for i, testCase := range testCases { // creating an input HTTP request. // Only the query parameters are relevant for this particular test. inputReq, err := http.NewRequest("GET", "http://example.com", nil) if err != nil { t.Fatalf("Error initializing input HTTP request: %v", err) } q := inputReq.URL.Query() q.Add(testCase.inputQueryKey, testCase.inputQueryValue) inputReq.URL.RawQuery = q.Encode() actualResult := isRequestPresignedSignatureV4(inputReq) if testCase.expectedResult != actualResult { t.Errorf("Test %d: Expected the result to `%v`, but instead got `%v`", i+1, testCase.expectedResult, actualResult) } } } // Tests is requested authenticated function, tests replies for s3 errors. func TestIsReqAuthenticated(t *testing.T) { option := S3ApiServerOption{} iam := NewIdentityAccessManagement(&option) iam.identities = []*Identity{ { Name: "someone", Credentials: []*Credential{ { AccessKey: "access_key_1", SecretKey: "secret_key_1", }, }, Actions: nil, }, } // List of test cases for validating http request authentication. testCases := []struct { req *http.Request s3Error s3err.ErrorCode }{ // When request is unsigned, access denied is returned. {mustNewRequest("GET", "http://127.0.0.1:9000", 0, nil, t), s3err.ErrAccessDenied}, // When request is properly signed, error is none. {mustNewSignedRequest("GET", "http://127.0.0.1:9000", 0, nil, t), s3err.ErrNone}, } // Validates all testcases. for i, testCase := range testCases { if _, s3Error := iam.reqSignatureV4Verify(testCase.req); s3Error != testCase.s3Error { io.ReadAll(testCase.req.Body) t.Fatalf("Test %d: Unexpected S3 error: want %d - got %d", i, testCase.s3Error, s3Error) } } } func TestCheckAdminRequestAuthType(t *testing.T) { option := S3ApiServerOption{} iam := NewIdentityAccessManagement(&option) iam.identities = []*Identity{ { Name: "someone", Credentials: []*Credential{ { AccessKey: "access_key_1", SecretKey: "secret_key_1", }, }, Actions: nil, }, } testCases := []struct { Request *http.Request ErrCode s3err.ErrorCode }{ {Request: mustNewRequest("GET", "http://127.0.0.1:9000", 0, nil, t), ErrCode: s3err.ErrAccessDenied}, {Request: mustNewSignedRequest("GET", "http://127.0.0.1:9000", 0, nil, t), ErrCode: s3err.ErrNone}, {Request: mustNewPresignedRequest("GET", "http://127.0.0.1:9000", 0, nil, t), ErrCode: s3err.ErrNone}, } for i, testCase := range testCases { if _, s3Error := iam.reqSignatureV4Verify(testCase.Request); s3Error != testCase.ErrCode { t.Errorf("Test %d: Unexpected s3error returned wanted %d, got %d", i, testCase.ErrCode, s3Error) } } } // Provides a fully populated http request instance, fails otherwise. func mustNewRequest(method string, urlStr string, contentLength int64, body io.ReadSeeker, t *testing.T) *http.Request { req, err := newTestRequest(method, urlStr, contentLength, body) if err != nil { t.Fatalf("Unable to initialize new http request %s", err) } return req } // This is similar to mustNewRequest but additionally the request // is signed with AWS Signature V4, fails if not able to do so. func mustNewSignedRequest(method string, urlStr string, contentLength int64, body io.ReadSeeker, t *testing.T) *http.Request { req := mustNewRequest(method, urlStr, contentLength, body, t) cred := &Credential{"access_key_1", "secret_key_1"} if err := signRequestV4(req, cred.AccessKey, cred.SecretKey); err != nil { t.Fatalf("Unable to inititalized new signed http request %s", err) } return req } // This is similar to mustNewRequest but additionally the request // is presigned with AWS Signature V4, fails if not able to do so. func mustNewPresignedRequest(method string, urlStr string, contentLength int64, body io.ReadSeeker, t *testing.T) *http.Request { req := mustNewRequest(method, urlStr, contentLength, body, t) cred := &Credential{"access_key_1", "secret_key_1"} if err := preSignV4(req, cred.AccessKey, cred.SecretKey, int64(10*time.Minute.Seconds())); err != nil { t.Fatalf("Unable to inititalized new signed http request %s", err) } return req } // Returns new HTTP request object. func newTestRequest(method, urlStr string, contentLength int64, body io.ReadSeeker) (*http.Request, error) { if method == "" { method = "POST" } // Save for subsequent use var hashedPayload string var md5Base64 string switch { case body == nil: hashedPayload = getSHA256Hash([]byte{}) default: payloadBytes, err := io.ReadAll(body) if err != nil { return nil, err } hashedPayload = getSHA256Hash(payloadBytes) md5Base64 = getMD5HashBase64(payloadBytes) } // Seek back to beginning. if body != nil { body.Seek(0, 0) } else { body = bytes.NewReader([]byte("")) } req, err := http.NewRequest(method, urlStr, body) if err != nil { return nil, err } if md5Base64 != "" { req.Header.Set("Content-Md5", md5Base64) } req.Header.Set("x-amz-content-sha256", hashedPayload) // Add Content-Length req.ContentLength = contentLength return req, nil } // getSHA256Hash returns SHA-256 hash in hex encoding of given data. func getSHA256Hash(data []byte) string { return hex.EncodeToString(getSHA256Sum(data)) } // getMD5HashBase64 returns MD5 hash in base64 encoding of given data. func getMD5HashBase64(data []byte) string { return base64.StdEncoding.EncodeToString(getMD5Sum(data)) } // getSHA256Hash returns SHA-256 sum of given data. func getSHA256Sum(data []byte) []byte { hash := sha256.New() hash.Write(data) return hash.Sum(nil) } // getMD5Sum returns MD5 sum of given data. func getMD5Sum(data []byte) []byte { hash := md5.New() hash.Write(data) return hash.Sum(nil) } // getMD5Hash returns MD5 hash in hex encoding of given data. func getMD5Hash(data []byte) string { return hex.EncodeToString(getMD5Sum(data)) } var ignoredHeaders = map[string]bool{ "Authorization": true, "Content-Type": true, "Content-Length": true, "User-Agent": true, } // Sign given request using Signature V4. func signRequestV4(req *http.Request, accessKey, secretKey string) error { // Get hashed payload. hashedPayload := req.Header.Get("x-amz-content-sha256") if hashedPayload == "" { return fmt.Errorf("Invalid hashed payload") } currTime := time.Now() // Set x-amz-date. req.Header.Set("x-amz-date", currTime.Format(iso8601Format)) // Get header map. headerMap := make(map[string][]string) for k, vv := range req.Header { // If request header key is not in ignored headers, then add it. if _, ok := ignoredHeaders[http.CanonicalHeaderKey(k)]; !ok { headerMap[strings.ToLower(k)] = vv } } // Get header keys. headers := []string{"host"} for k := range headerMap { headers = append(headers, k) } sort.Strings(headers) region := "us-east-1" // Get canonical headers. var buf bytes.Buffer for _, k := range headers { buf.WriteString(k) buf.WriteByte(':') switch { case k == "host": buf.WriteString(req.URL.Host) fallthrough default: for idx, v := range headerMap[k] { if idx > 0 { buf.WriteByte(',') } buf.WriteString(v) } buf.WriteByte('\n') } } canonicalHeaders := buf.String() // Get signed headers. signedHeaders := strings.Join(headers, ";") // Get canonical query string. req.URL.RawQuery = strings.Replace(req.URL.Query().Encode(), "+", "%20", -1) // Get canonical URI. canonicalURI := EncodePath(req.URL.Path) // Get canonical request. // canonicalRequest = // \n // \n // \n // \n // \n // // canonicalRequest := strings.Join([]string{ req.Method, canonicalURI, req.URL.RawQuery, canonicalHeaders, signedHeaders, hashedPayload, }, "\n") // Get scope. scope := strings.Join([]string{ currTime.Format(yyyymmdd), region, "s3", "aws4_request", }, "/") stringToSign := "AWS4-HMAC-SHA256" + "\n" + currTime.Format(iso8601Format) + "\n" stringToSign = stringToSign + scope + "\n" stringToSign = stringToSign + getSHA256Hash([]byte(canonicalRequest)) date := sumHMAC([]byte("AWS4"+secretKey), []byte(currTime.Format(yyyymmdd))) regionHMAC := sumHMAC(date, []byte(region)) service := sumHMAC(regionHMAC, []byte("s3")) signingKey := sumHMAC(service, []byte("aws4_request")) signature := hex.EncodeToString(sumHMAC(signingKey, []byte(stringToSign))) // final Authorization header parts := []string{ "AWS4-HMAC-SHA256" + " Credential=" + accessKey + "/" + scope, "SignedHeaders=" + signedHeaders, "Signature=" + signature, } auth := strings.Join(parts, ", ") req.Header.Set("Authorization", auth) return nil } // preSignV4 presign the request, in accordance with // http://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-query-string-auth.html. func preSignV4(req *http.Request, accessKeyID, secretAccessKey string, expires int64) error { // Presign is not needed for anonymous credentials. if accessKeyID == "" || secretAccessKey == "" { return errors.New("Presign cannot be generated without access and secret keys") } region := "us-east-1" date := time.Now().UTC() scope := getScope(date, region) credential := fmt.Sprintf("%s/%s", accessKeyID, scope) // Set URL query. query := req.URL.Query() query.Set("X-Amz-Algorithm", signV4Algorithm) query.Set("X-Amz-Date", date.Format(iso8601Format)) query.Set("X-Amz-Expires", strconv.FormatInt(expires, 10)) query.Set("X-Amz-SignedHeaders", "host") query.Set("X-Amz-Credential", credential) query.Set("X-Amz-Content-Sha256", unsignedPayload) // "host" is the only header required to be signed for Presigned URLs. extractedSignedHeaders := make(http.Header) extractedSignedHeaders.Set("host", req.Host) queryStr := strings.Replace(query.Encode(), "+", "%20", -1) canonicalRequest := getCanonicalRequest(extractedSignedHeaders, unsignedPayload, queryStr, req.URL.Path, req.Method) stringToSign := getStringToSign(canonicalRequest, date, scope) signingKey := getSigningKey(secretAccessKey, date, region, "s3") signature := getSignature(signingKey, stringToSign) req.URL.RawQuery = query.Encode() // Add signature header to RawQuery. req.URL.RawQuery += "&X-Amz-Signature=" + url.QueryEscape(signature) // Construct the final presigned URL. return nil } // EncodePath encode the strings from UTF-8 byte representations to HTML hex escape sequences // // This is necessary since regular url.Parse() and url.Encode() functions do not support UTF-8 // non english characters cannot be parsed due to the nature in which url.Encode() is written // // This function on the other hand is a direct replacement for url.Encode() technique to support // pretty much every UTF-8 character. func EncodePath(pathName string) string { if reservedObjectNames.MatchString(pathName) { return pathName } var encodedPathname string for _, s := range pathName { if 'A' <= s && s <= 'Z' || 'a' <= s && s <= 'z' || '0' <= s && s <= '9' { // §2.3 Unreserved characters (mark) encodedPathname = encodedPathname + string(s) continue } switch s { case '-', '_', '.', '~', '/': // §2.3 Unreserved characters (mark) encodedPathname = encodedPathname + string(s) continue default: len := utf8.RuneLen(s) if len < 0 { // if utf8 cannot convert return the same string as is return pathName } u := make([]byte, len) utf8.EncodeRune(u, s) for _, r := range u { hex := hex.EncodeToString([]byte{r}) encodedPathname = encodedPathname + "%" + strings.ToUpper(hex) } } } return encodedPathname }