Short hash implementation and test, updated cbc tests as they ignored padding

multiplatform-crypto-libsodium-bindings/src/nativeMain/kotlin/com/ionspin/kotlin/crypto/shortinputhash/ShortHash.kt

@@ -0,0 +1,35 @@
+package com.ionspin.kotlin.crypto.shortinputhash
+
+import com.ionspin.kotlin.crypto.util.toPtr
+import kotlinx.cinterop.convert
+import kotlinx.cinterop.pin
+import libsodium.crypto_shorthash
+import libsodium.crypto_shorthash_keygen
+
+/**
+ * Created by Ugljesa Jovanovic
+ * ugljesa.jovanovic@ionspin.com
+ * on 21-Aug-2020
+ */
+actual object ShortHash {
+    actual fun shortHash(data: UByteArray, key: UByteArray): UByteArray {
+        val hashResult = UByteArray(crypto_shorthash_BYTES)
+        val hashResultPinned = hashResult.pin()
+        val dataPinned = data.pin()
+        val keyPinned = key.pin()
+        crypto_shorthash(hashResultPinned.toPtr(), dataPinned.toPtr(), data.size.convert(), keyPinned.toPtr())
+        hashResultPinned.unpin()
+        dataPinned.unpin()
+        keyPinned.unpin()
+        return hashResult
+    }
+
+    actual fun shortHashKeygen(): UByteArray {
+        val keyResult = UByteArray(crypto_shorthash_KEYBYTES)
+        val keyResultPinned = keyResult.pin()
+        crypto_shorthash_keygen(keyResultPinned.toPtr())
+        keyResultPinned.unpin()
+        return keyResult
+    }
+
+}