Support HKDF in JDK provider

Author: whyoleg

cryptography-providers/jdk/src/jvmMain/kotlin/JdkCryptographyProvider.kt

@@ -87,8 +87,9 @@ internal class JdkCryptographyProvider(
             RSA.PKCS1 -> JdkRsaPkcs1(state)
             RSA.RAW  -> JdkRsaRaw(state)
             ECDSA     -> JdkEcdsa(state)
-            ECDH    -> JdkEcdh(state)
-            PBKDF2  -> JdkPbkdf2(state)
+            ECDH     -> JdkEcdh(state)
+            PBKDF2   -> JdkPbkdf2(state)
+            HKDF     -> JdkHkdf(state, this)
             else      -> null
         }
     } as A?

cryptography-providers/jdk/src/jvmMain/kotlin/algorithms/JdkHkdf.kt

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2024 Oleg Yukhnevich. Use of this source code is governed by the Apache 2.0 license.
+ */
+
+package dev.whyoleg.cryptography.providers.jdk.algorithms
+
+import dev.whyoleg.cryptography.*
+import dev.whyoleg.cryptography.algorithms.*
+import dev.whyoleg.cryptography.providers.base.algorithms.*
+import dev.whyoleg.cryptography.providers.jdk.*
+
+internal class JdkHkdf(
+    private val state: JdkCryptographyState,
+    provider: CryptographyProvider,
+) : BaseHkdf(provider) {
+    override fun digestSize(digest: CryptographyAlgorithmId<Digest>): Int {
+        return state.messageDigest(digest.name).use { it.digestLength }
+    }
+}

cryptography-providers/jdk/src/jvmMain/kotlin/algorithms/JdkHmac.kt

@@ -40,7 +40,7 @@ internal class JdkHmac(
     }
 }
 
-private fun CryptographyAlgorithmId<Digest>.blockSize(): Int = when (this) {
+internal fun CryptographyAlgorithmId<Digest>.blockSize(): Int = when (this) {
     SHA1     -> 64
     SHA224   -> 64
     SHA256   -> 64