prevent external files from calling sha256 hash method

Author: jonesmac

sdk/src/androidTest/java/network/xyo/client/boundwitness/XyoBoundWitnessTest.kt

@@ -78,7 +78,6 @@ class XyoBoundWitnessTest {
             val bw = XyoBoundWitnessBuilder(appContext).signer(Account.random()).payloads(listOf(
                 TestPayload1()
             )).build()
-            assert(bw.rootHash() == XyoSerializable.sha256String(bw))
             assert(bw.dataHash() == bw.getBodyJson().dataHash())
             assert(bw.meta.client == "android")
             assert(bw.meta.signatures?.size == 1)

sdk/src/androidTest/java/network/xyo/client/witness/LocationWitnessTest.kt

@@ -63,7 +63,7 @@ class LocationWitnessTest {
             val panel = XyoPanel(appContext, Account.random(), arrayListOf(Pair("${TestConstants.nodeUrlBeta}/Archivist", null)), listOf(XyoLocationWitness()))
             val result = panel.reportAsyncQuery()
             result.payloads?.forEach{ payload ->
-                val hash = XyoSerializable.sha256String(payload)
+                val hash = payload.dataHash()
                 assert(result.bw.payload_hashes.contains(hash))
             }
         }

sdk/src/main/java/network/xyo/client/boundwitness/QueryBoundWitnessBuilder.kt

@@ -13,7 +13,7 @@ class QueryBoundWitnessBuilder(context: Context) : XyoBoundWitnessBuilder(contex
     private lateinit var queryHash: String
 
     fun query(query: XyoPayload): QueryBoundWitnessBuilder {
-        this.queryHash = XyoSerializable.sha256String(query)
+        this.queryHash = query.dataHash()
         this.payload(query.schema, query)
         return this
     }

sdk/src/main/java/network/xyo/client/boundwitness/XyoBoundWitnessBuilder.kt

@@ -91,7 +91,7 @@ open class XyoBoundWitnessBuilder(private val context: Context) {
         // Note: Once fields are hashed, do not update class properties that are expected
         // in the serialized version of the bw because they will invalidate the hash
         val hashable = hashableFields()
-        val hash = XyoSerializable.sha256String(hashable)
+        val hash = hashable.dataHash()
         bw.meta.signatures = this.sign(hash)
     }
 

sdk/src/main/java/network/xyo/client/boundwitness/XyoBoundWitnessJson.kt

@@ -2,9 +2,10 @@ package network.xyo.client.boundwitness
 
 import com.squareup.moshi.Json
 import com.squareup.moshi.JsonClass
+import network.xyo.client.lib.XyoSerializable
 
 @JsonClass(generateAdapter = true)
-class XyoBoundWitnessMeta: XyoBoundWitnessMetaInterface {
+class XyoBoundWitnessMeta: XyoBoundWitnessMetaInterface, XyoSerializable() {
     override var signatures: List<String>? = null
     override var client: String? = null
 }

sdk/src/main/java/network/xyo/client/lib/XyoSerializable.kt

@@ -87,12 +87,13 @@ abstract class XyoSerializable: Serializable  {
             return md.digest()
         }
 
-        fun <T: XyoSerializable>sha256(obj: T): ByteArray {
+        protected fun <T: XyoSerializable>sha256(obj: T): ByteArray {
             val json = toJson(obj, true)
             return sha256(json)
         }
 
-        fun <T: XyoSerializable>sha256String(obj: T): String {
+        @JvmStatic
+        protected fun <T: XyoSerializable>sha256String(obj: T): String {
             val shaBytes = sha256(obj)
             return bytesToHex(shaBytes)
         }