Add support for hashing

__tests__/SigningService.test.ts

@@ -164,6 +164,7 @@ describe("SigningService tests", () => {
       attachmentsToVerify.push(attachmentData);
       attachmentsToVerify.push(attachmentData1);
       attachmentsToVerify.push(attachmentData2);
+      attachmentsToVerify.push(attachmentHash);
 
       var result = await signingService.verifyAttachments(publicKeyPEM, attachmentsToVerify, signatures);
       console.log(result);

src/services/SigningService/SigningService.ts

@@ -350,30 +350,36 @@ class SigningService {
 
       if(filenameHash in signatures) {
         var attachmentSignatures = signatures[filenameHash];
- 
-        var hashingAlgorithms = {};
 
-        for(var j = 0; j < attachmentSignatures.length; j++) {
-          var signature = attachmentSignatures[j];
-          hashingAlgorithms[signature.hashingAlgorithm] = true;
-        }
+        var attachmentVersionsHashed = [];
 
-        var attachmentVersions = [];
- 
-        for (var hashingAlgorithm in hashingAlgorithms){
-            if (hashingAlgorithms.hasOwnProperty(hashingAlgorithm)) {
-              var attachmentVersion = {
-                filename: filename,
-                content: attachment.content,
-                type: "raw",
-                hashingAlgorithm: hashingAlgorithm
-              };    
-              
-              attachmentVersions.push(attachmentVersion);
-            }
-        }
+        if(attachment.type == "raw") {
+          var hashingAlgorithms = {};
 
-        var attachmentVersionsHashed = await this.hashAttachments(attachmentVersions, true);
+          for(var j = 0; j < attachmentSignatures.length; j++) {
+            var signature = attachmentSignatures[j];
+            hashingAlgorithms[signature.hashingAlgorithm] = true;
+          }
+
+          var attachmentVersions = [];
+  
+          for (var hashingAlgorithm in hashingAlgorithms){
+              if (hashingAlgorithms.hasOwnProperty(hashingAlgorithm)) {
+                var attachmentVersion = {
+                  filename: filename,
+                  content: attachment.content,
+                  type: "raw",
+                  hashingAlgorithm: hashingAlgorithm
+                };    
+                
+                attachmentVersions.push(attachmentVersion);
+              }
+          }
+
+          attachmentVersionsHashed = await this.hashAttachments(attachmentVersions, true);
+        } else {
+          attachmentVersionsHashed.push(attachment);
+        }
 
         var valid = false;