Added sha2 hashes in common and native and test

multiplatform-crypto-libsodium-bindings/src/commonMain/kotlin/com.ionspin.kotlin.crypto/generichash/GenericHash.kt

@@ -7,10 +7,18 @@ package com.ionspin.kotlin.crypto.generichash
  */
 
 val crypto_generichash_BYTES = 32
+val crypto_generichash_blake2b_BYTES_MIN = 16
+val crypto_generichash_blake2b_BYTES_MAX = 64
+val crypto_generichash_blake2b_BYTES = 32
+val crypto_generichash_blake2b_KEYBYTES_MIN = 16
+val crypto_generichash_blake2b_KEYBYTES_MAX = 64
+val crypto_generichash_blake2b_KEYBYTES = 32
+val crypto_generichash_blake2b_SALTBYTES = 16
+
+expect class GenericHashStateInternal
 
 data class GenericHashState(val hashLength: Int, val internalState: GenericHashStateInternal)
 
-expect class GenericHashStateInternal
 
 expect object GenericHash {
 
@@ -21,6 +29,15 @@ expect object GenericHash {
     fun genericHashFinal(state : GenericHashState) : UByteArray
 
     fun genericHashKeygen() : UByteArray
+//      ---- Not present in LazySodium nor libsodium.js
+//    fun blake2b(message : UByteArray, requestedHashLength: Int, key : UByteArray? = null) : UByteArray
+//
+//    fun blake2bInit(requestedHashLength: Int, key : UByteArray? = null) : Blake2bState
+//    fun blake2bUpdate(state: GenericHashState, messagePart : UByteArray)
+//    fun blake2bFinal(state : GenericHashState) : UByteArray
+//
+//    fun blake2bKeygen() : UByteArray
+
 
 }
 

multiplatform-crypto-libsodium-bindings/src/commonMain/kotlin/com.ionspin.kotlin.crypto/hash/Hash.kt

@@ -0,0 +1,31 @@
+package com.ionspin.kotlin.crypto.hash
+
+/**
+ * Created by Ugljesa Jovanovic
+ * ugljesa.jovanovic@ionspin.com
+ * on 31-Aug-2020
+ */
+
+val crypto_hash_BYTES = 64
+val crypto_hash_sha256_BYTES = 32
+val crypto_hash_sha512_BYTES = 64
+
+expect class Sha256State
+expect class Sha512State
+
+expect object Hash {
+
+    fun hash(data: UByteArray) : UByteArray
+
+    fun sha256(data: UByteArray) : UByteArray
+    fun sha256Init() : Sha256State
+    fun sha256Update(state: Sha256State, data : UByteArray)
+    fun sha256Final(state : Sha256State) : UByteArray
+
+    fun sha512(data: UByteArray) : UByteArray
+    fun sha512Init() : Sha512State
+    fun sha512Update(state: Sha512State, data : UByteArray)
+    fun sha512Final(state : Sha512State) : UByteArray
+
+
+}