Merge pull request #8 from Mastercard/feature/decrypt_a_primitive_type_value

Decrypt a primitive type value to the same path than the encrypted data fields.

Author: ech0s7r

lib/mcapi/crypto/crypto.js

@@ -99,7 +99,11 @@ function Crypto(config) {
     decipher.update(forge.util.createBuffer(utils.stringToBytes(encryptedData, this.encoding), 'binary'));
     decipher.finish();
 
-    return JSON.parse(decipher.output.data);
+    try {
+      return JSON.parse(decipher.output.data);
+    } catch (e){
+      return decipher.output.data;
+    }
   };
 
   /**

test/payload-encryption.test.js

@@ -161,6 +161,27 @@ describe("Payload encryption", () => {
       assert.ok(body.path.to.foo);
       assert.ok(body.path.to.foo.accountNumber === "5123456789012345");
     });
+
+    it("primitive type", () => {
+      let body = {
+        data: {
+          encryptedValue:
+            'e2d6a3a76ea6e605e55b400e5a4eba11',
+          iv: '3ce861359fa1630c7a794901ee14bf41',
+          encryptedKey:
+            '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',
+          publicKeyFingerprint:
+            '761b003c1eade3a5490e5000d37887baa5e6ec0e226c07706e599451fc032a79',
+          oaepHashingAlgorithm: 'SHA256'
+        }
+      };
+      decryptBody.call(fle, {
+        element: "data",
+        obj: "data"
+      }, body);
+      assert.ok(body);
+      assert.ok(body.data === 'string');
+    });
   });
 
 });