Add stateless implementation

multiplatform-crypto-delegated/src/jsMain/kotlin/com/ionspin/kotlin/crypto/JsSodiumInterface.kt

@@ -9,6 +9,8 @@ import org.khronos.webgl.Uint8Array
  */
 interface JsSodiumInterface {
 
+    fun crypto_hash_sha256(message: Uint8Array) : Uint8Array
+
     fun crypto_generichash(hashLength: Int, inputMessage: Uint8Array) : Uint8Array
 
     fun randombytes_buf(numberOfBytes: Int) : Uint8Array

multiplatform-crypto-delegated/src/jsMain/kotlin/com/ionspin/kotlin/crypto/hash/sha/Sha256Delegated.kt

@@ -1,5 +1,9 @@
 package com.ionspin.kotlin.crypto.hash.sha
 
+import com.ionspin.kotlin.crypto.getSodium
+import com.ionspin.kotlin.crypto.hash.blake2b.Blake2bDelegatedStateless
+import org.khronos.webgl.Uint8Array
+
 /**
  * Created by Ugljesa Jovanovic
  * ugljesa.jovanovic@ionspin.com
@@ -25,6 +29,15 @@ actual class Sha256Delegated actual constructor(key: UByteArray?, hashLength: In
 actual object Sha256StatelessDelegated : StatelessSha256 {
 
     override fun digest(inputMessage: UByteArray): UByteArray {
-        TODO("not implemented yet")
+        val hashed = getSodium().crypto_hash_sha256(Uint8Array(inputMessage.toByteArray().toTypedArray()))
+        val hash = UByteArray(MAX_HASH_BYTES)
+        for (i in 0 until MAX_HASH_BYTES) {
+            js(
+                """
+                    hash[i] = hashed[i]
+                """
+            )
+        }
+        return hash
     }
 }

multiplatform-crypto-delegated/src/jsMain/kotlin/libsodium.kt

@@ -15,5 +15,7 @@ import kotlin.js.Promise
 @JsName("ready")
 external val _libsodiumPromise : Promise<dynamic>
 
-external fun crypto_generichash(hashLength: Int, inputMessage: String) : String
+external fun crypto_generichash(hashLength: Int, inputMessage: Uint8Array) : Uint8Array
+
+external fun crypto_hash_sha256(message: Uint8Array) : Uint8Array