Add support for individually disabling signature verification

config.json

@@ -6,8 +6,7 @@
           "Program": "./example.sh",
           "AppendPayload": true
       },
-      "Secret": "THISISVERYSECRET",
-      "SignatureHeader": "X-Gitea-Signature",
+      "DisableSignatureVerification": true,
       "Tests": [
         {
           "Program": "echo",

config/config.go

@@ -8,6 +8,7 @@ type Config struct {
 		Secret                       string
 		SignaturePrefix              string
 		SignatureHeader              string
+		DisableSignatureVerification bool
 		Tests                        []Command
 	}
 }
@@ -22,10 +23,10 @@ func (c Config) Validate() error {
 		if service.Script.Program == "" {
 			return requiredFieldError{"Script.Program", serviceName}
 		}
-		if service.SignatureHeader == "" {
+		if !service.DisableSignatureVerification && service.SignatureHeader == "" {
 			return requiredFieldError{"SignatureHeader", serviceName}
 		}
-		if service.Secret == "" {
+		if !service.DisableSignatureVerification && service.Secret == "" {
 			return requiredFieldError{"Secret", serviceName}
 		}
 	}

main.go

@@ -75,7 +75,8 @@ func webhookHandler(w http.ResponseWriter, r *http.Request) {
 	)
 	fmt.Printf("signature          = %v\n", signature)
 	fmt.Printf("calcuatedSignature = %v\n", calculatedSignature)
-	if signature != calculatedSignature && checkSignature {
+	if service.DisableSignatureVerification ||
+		(signature != calculatedSignature && checkSignature) {
 		writeResponse(w, 400, "Bad Request: Signatures do not match")
 		fmt.Println("Signatures do not match!")
 		return

readme.md

@@ -27,7 +27,9 @@ For GitHub it would be `sha256=`.
 
 ### Disable Signature Verification
 
-You can disable signature verification altogether by setting environment variable
+You can disable signature verification by setting `DisableSignatureVerification` for a service to `true`.
+
+You can disable signature verification for all services by setting environment variable
 `NO_SIGNATURE_VERIFICATION` to `true`.
 
 ## Writing Commands
@@ -63,8 +65,7 @@ An example config file can be found [here](./config.json) but also below:
           "Program": "./example.sh",
           "AppendPayload": true
       },
-      "Secret": "THISISVERYSECRET",
-      "SignatureHeader": "X-Gitea-Signature",
+      "DisableSignatureVerification": true,
       "Tests": [
         {
           "Program": "echo",