From 6fac3c2f0c86853764c58112b2a6cd554434ce68 Mon Sep 17 00:00:00 2001
From: Brad <wbhumphrey@gmail.com>
Date: Tue, 24 Mar 2020 10:32:01 -0600
Subject: [PATCH 1/2] Allow apps to generate a signatureBase directly

---
 auther.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/auther.go b/auther.go
index a4b1252..fd638f8 100644
--- a/auther.go
+++ b/auther.go
@@ -275,10 +275,10 @@ func collectParameters(req *http.Request, oauthParams map[string]string) (map[st
 	return params, nil
 }
 
-// signatureBase combines the uppercase request method, percent encoded base
+// SignatureBase combines the uppercase request method, percent encoded base
 // string URI, and normalizes the request parameters int a parameter string.
 // Returns the OAuth1 signature base string according to RFC5849 3.4.1.
-func signatureBase(req *http.Request, params map[string]string) string {
+func SignatureBase(req *http.Request, params map[string]string) string {
 	method := strings.ToUpper(req.Method)
 	baseURL := baseURI(req)
 	parameterString := normalizedParameterString(params)

From 8eea4379911fb0895f037cd18ba9d1cf2e545bee Mon Sep 17 00:00:00 2001
From: Brad <wbhumphrey@gmail.com>
Date: Tue, 24 Mar 2020 10:50:44 -0600
Subject: [PATCH 2/2] Update SignatureBase usages

---
 auther.go         | 6 +++---
 auther_test.go    | 2 +-
 reference_test.go | 2 +-
 validator.go      | 2 +-
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/auther.go b/auther.go
index fd638f8..0715015 100644
--- a/auther.go
+++ b/auther.go
@@ -73,7 +73,7 @@ func (a *auther) setRequestTokenAuthHeader(req *http.Request) error {
 		oauthParams[oauthBodyHash] = bodyHash
 	}
 
-	signatureBase := signatureBase(req, params)
+	signatureBase := SignatureBase(req, params)
 	signature, err := a.signer().Sign("", signatureBase)
 	if err != nil {
 		return err
@@ -102,7 +102,7 @@ func (a *auther) setAccessTokenAuthHeader(req *http.Request, requestToken, reque
 		oauthParams[oauthBodyHash] = bodyHash
 	}
 
-	signatureBase := signatureBase(req, params)
+	signatureBase := SignatureBase(req, params)
 	signature, err := a.signer().Sign(requestSecret, signatureBase)
 	if err != nil {
 		return err
@@ -129,7 +129,7 @@ func (a *auther) setRequestAuthHeader(req *http.Request, accessToken *Token) err
 		return err
 	}
 
-	signatureBase := signatureBase(req, params)
+	signatureBase := SignatureBase(req, params)
 	signature, err := a.signer().Sign(tokenSecret, signatureBase)
 	if err != nil {
 		return err
diff --git a/auther_test.go b/auther_test.go
index 84f0d3e..08edb94 100644
--- a/auther_test.go
+++ b/auther_test.go
@@ -250,7 +250,7 @@ func TestSignatureBase(t *testing.T) {
 	}
 	// assert that method is uppercased, base uri rules applied, queries added, joined by &
 	for _, c := range cases {
-		base := signatureBase(c.req, c.params)
+		base := SignatureBase(c.req, c.params)
 		assert.Equal(t, c.signatureBase, base)
 	}
 }
diff --git a/reference_test.go b/reference_test.go
index 94afcfe..a0f7994 100644
--- a/reference_test.go
+++ b/reference_test.go
@@ -135,7 +135,7 @@ func TestTwitterSignatureBase(t *testing.T) {
 	oauthParams := auther.commonOAuthParams()
 	oauthParams[oauthTokenParam] = expectedTwitterOAuthToken
 	params, err := collectParameters(req, oauthParams)
-	signatureBase := signatureBase(req, params)
+	signatureBase := SignatureBase(req, params)
 	// assert that the signature base string matches the reference
 	// checks that method is uppercased, url is encoded, parameter string is added, all joined by &
 	expectedSignatureBase := "POST&https%3A%2F%2Fapi.twitter.com%2F1%2Fstatuses%2Fupdate.json&include_entities%3Dtrue%26oauth_consumer_key%3Dxvz1evFS4wEEPTGEFPHBog%26oauth_nonce%3DkYjzVBB8Y0ZFabxSWbWovY3uYSQ2pTgmZeNu2VS4cg%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp%3D1318622958%26oauth_token%3D370773112-GmHxMAgYyLbNEtIKZeRNFsMKPR9EyMZeS9weJAEb%26oauth_version%3D1.0%26status%3DHello%2520Ladies%2520%252B%2520Gentlemen%252C%2520a%2520signed%2520OAuth%2520request%2521"
diff --git a/validator.go b/validator.go
index 32c3f76..7177a67 100644
--- a/validator.go
+++ b/validator.go
@@ -122,7 +122,7 @@ func (r providerRequest) checkSignature(signer Signer) error {
 	if signer == nil {
 		return errSignatureMismatch
 	}
-	base := signatureBase(r.req, r.oauthParams)
+	base := SignatureBase(r.req, r.oauthParams)
 	signature, err := signer.Sign("", base)
 	if err != nil {
 		return err