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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,98 @@ | ||
package gateway | ||
|
||
import ( | ||
"errors" | ||
"net/http" | ||
"strings" | ||
"time" | ||
) | ||
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type RequestSigning struct { | ||
BaseMiddleware | ||
} | ||
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func (s *RequestSigning) Name() string { | ||
return "RequestSigning" | ||
} | ||
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func (s *RequestSigning) EnabledForSpec() bool { | ||
return s.Spec.RequestSigning.IsEnabled | ||
} | ||
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var supportedAlgorithms = []string{"hmac-sha1", "hmac-sha256", "hmac-sha384", "hmac-sha512"} | ||
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func generateHeaderList(r *http.Request) []string { | ||
headers := make([]string, len(r.Header)+1) | ||
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headers[0] = "(request-target)" | ||
i := 1 | ||
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for k := range r.Header { | ||
loweredCaseHeader := strings.ToLower(k) | ||
headers[i] = strings.TrimSpace(loweredCaseHeader) | ||
i++ | ||
} | ||
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//Date header is must as per Signing HTTP Messages Draft | ||
if r.Header.Get("date") == "" { | ||
refDate := "Mon, 02 Jan 2006 15:04:05 MST" | ||
tim := time.Now().Format(refDate) | ||
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r.Header.Set("date", tim) | ||
headers = append(headers, "date") | ||
} | ||
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return headers | ||
} | ||
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func (s *RequestSigning) ProcessRequest(w http.ResponseWriter, r *http.Request, _ interface{}) (error, int) { | ||
if s.Spec.RequestSigning.Secret == "" || s.Spec.RequestSigning.KeyId == "" || s.Spec.RequestSigning.Algorithm == "" { | ||
log.Error("Fields required for signing the request are missing") | ||
return errors.New("Fields required for signing the request are missing"), http.StatusInternalServerError | ||
} | ||
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var algoList []string | ||
if len(s.Spec.HmacAllowedAlgorithms) > 0 { | ||
algoList = s.Spec.HmacAllowedAlgorithms | ||
} else { | ||
algoList = supportedAlgorithms | ||
} | ||
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algorithmAllowed := false | ||
for _, alg := range algoList { | ||
if alg == s.Spec.RequestSigning.Algorithm { | ||
algorithmAllowed = true | ||
break | ||
} | ||
} | ||
if !algorithmAllowed { | ||
log.WithField("algorithm", s.Spec.RequestSigning.Algorithm).Error("Algorithm not supported") | ||
return errors.New("Request signing Algorithm is not supported"), http.StatusInternalServerError | ||
} | ||
|
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headers := generateHeaderList(r) | ||
signatureString, err := generateHMACSignatureStringFromRequest(r, headers) | ||
if err != nil { | ||
log.Error(err) | ||
return err, http.StatusInternalServerError | ||
} | ||
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strHeaders := strings.Join(headers, " ") | ||
encodedSignature := generateEncodedSignature(signatureString, s.Spec.RequestSigning.Secret, s.Spec.RequestSigning.Algorithm) | ||
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//Generate Authorization header | ||
authHeader := "Signature " | ||
//Append keyId | ||
authHeader += "keyId=\"" + s.Spec.RequestSigning.KeyId + "\"," | ||
//Append algorithm | ||
authHeader += "algorithm=\"" + s.Spec.RequestSigning.Algorithm + "\"," | ||
//Append Headers | ||
authHeader += "headers=\"" + strHeaders + "\"," | ||
//Append signature | ||
authHeader += "signature=\"" + encodedSignature + "\"" | ||
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r.Header.Set("Authorization", authHeader) | ||
log.Debug("Setting Authorization headers as =", authHeader) | ||
|
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return nil, http.StatusOK | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,94 @@ | ||
package gateway | ||
|
||
import ( | ||
"encoding/json" | ||
"testing" | ||
|
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"github.com/TykTechnologies/tyk/test" | ||
"github.com/TykTechnologies/tyk/user" | ||
) | ||
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var algoList = [4]string{"hmac-sha1", "hmac-sha256", "hmac-sha384", "hmac-sha512"} | ||
|
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func generateSpec(algo string) { | ||
sessionKey := CreateSession(func(s *user.SessionState) { | ||
s.HMACEnabled = true | ||
s.HmacSecret = "9879879878787878" | ||
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s.AccessRights = map[string]user.AccessDefinition{"protected": {APIID: "protected", Versions: []string{"v1"}}} | ||
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}) | ||
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BuildAndLoadAPI(func(spec *APISpec) { | ||
spec.APIID = "protected" | ||
spec.Name = "protected api" | ||
spec.Proxy.ListenPath = "/something" | ||
spec.EnableSignatureChecking = true | ||
spec.Auth.AuthHeaderName = "authorization" | ||
spec.HmacAllowedClockSkew = 5000 | ||
spec.UseKeylessAccess = false | ||
spec.UseBasicAuth = false | ||
spec.UseOauth2 = false | ||
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version := spec.VersionData.Versions["v1"] | ||
version.UseExtendedPaths = true | ||
spec.VersionData.Versions["v1"] = version | ||
}, func(spec *APISpec) { | ||
spec.Proxy.ListenPath = "/test" | ||
spec.RequestSigning.IsEnabled = true | ||
spec.RequestSigning.KeyId = sessionKey | ||
spec.RequestSigning.Secret = "9879879878787878" | ||
spec.RequestSigning.Algorithm = algo | ||
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version := spec.VersionData.Versions["v1"] | ||
json.Unmarshal([]byte(`{ | ||
"use_extended_paths": true, | ||
"extended_paths": { | ||
"url_rewrites": [{ | ||
"path": "/by_name", | ||
"match_pattern": "/by_name(.*)", | ||
"method": "GET", | ||
"rewrite_to": "tyk://protected api/get" | ||
}] | ||
} | ||
}`), &version) | ||
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spec.VersionData.Versions["v1"] = version | ||
}) | ||
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} | ||
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func TestRequestSigning(t *testing.T) { | ||
ts := StartTest() | ||
defer ts.Close() | ||
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for _, algo := range algoList { | ||
name := "Test with " + algo | ||
t.Run(name, func(t *testing.T) { | ||
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generateSpec(algo) | ||
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ts.Run(t, []test.TestCase{ | ||
{Path: "/test/by_name", Code: 200}, | ||
}...) | ||
}) | ||
} | ||
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t.Run("Invalid algorithm", func(t *testing.T) { | ||
generateSpec("random") | ||
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ts.Run(t, []test.TestCase{ | ||
{Path: "/test/by_name", Code: 500}, | ||
}...) | ||
}) | ||
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t.Run("Invalid Date field", func(t *testing.T) { | ||
generateSpec("hmac-sha1") | ||
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headers := map[string]string{"date": "Mon, 02 Jan 2006 15:04:05 GMT"} | ||
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ts.Run(t, []test.TestCase{ | ||
{Path: "/test/by_name", Headers: headers, Code: 400}, | ||
}...) | ||
}) | ||
} |