Add package to checksum class files and implement MD5

Author: lauzadis

aws-crt-kotlin/build.gradle.kts

@@ -100,7 +100,7 @@ kotlin {
 // disable "standalone" mode in simulator tests since it causes TLS issues. this means we need to manage the simulator
 // ourselves (booting / shutting down). FIXME: https://youtrack.jetbrains.com/issue/KT-38317
 kotlin {
-    val simulatorDeviceName = project.findProperty("iosSimulatorDevice") as? String ?: "iPhone 15"
+    val simulatorDeviceName = project.findProperty("iosSimulatorDevice") as? String ?: "iPhone 16"
 
     val xcrun = "/usr/bin/xcrun"
 

aws-crt-kotlin/native/src/aws/sdk/kotlin/crt/util/DigestNative.kt

@@ -2,10 +2,9 @@
  * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
  * SPDX-License-Identifier: Apache-2.0
  */
-
 package aws.sdk.kotlin.crt.util
 
-import Sha256
+import aws.sdk.kotlin.crt.util.hashing.Sha256
 
 /**
  * Utility object for various hash functions

aws-crt-kotlin/native/src/aws/sdk/kotlin/crt/util/hashing/CrcNative.kt

@@ -2,6 +2,8 @@
  * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
  * SPDX-License-Identifier: Apache-2.0
  */
+package aws.sdk.kotlin.crt.util.hashing
+
 import kotlinx.cinterop.*
 import libcrt.aws_checksums_crc32
 import libcrt.aws_checksums_crc32c

aws-crt-kotlin/native/src/aws/sdk/kotlin/crt/util/hashing/HashFunctionNative.kt

@@ -2,6 +2,8 @@
  * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
  * SPDX-License-Identifier: Apache-2.0
  */
+package aws.sdk.kotlin.crt.util.hashing
+
 /**
  * A function which calculates the hash of given data
  */

aws-crt-kotlin/native/src/aws/sdk/kotlin/crt/util/hashing/Md5Native.kt

@@ -0,0 +1,58 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+package aws.sdk.kotlin.crt.util.hashing
+
+import aws.sdk.kotlin.crt.Allocator
+import aws.sdk.kotlin.crt.awsAssertOpSuccess
+import kotlinx.cinterop.addressOf
+import kotlinx.cinterop.cValue
+import kotlinx.cinterop.convert
+import kotlinx.cinterop.pointed
+import kotlinx.cinterop.reinterpret
+import kotlinx.cinterop.usePinned
+import libcrt.aws_byte_buf
+import libcrt.aws_byte_cursor_from_array
+import libcrt.aws_hash_destroy
+import libcrt.aws_hash_finalize
+import libcrt.aws_hash_update
+import libcrt.aws_md5_new
+
+/**
+ * MD5 hash function implemented using bindings to CRT
+ */
+public class Md5 : HashFunction {
+    private var md5 = checkNotNull(aws_md5_new(Allocator.Default)) { "aws_md5_new" }
+
+    override fun update(input: ByteArray, offset: Int, length: Int) {
+        val inputCursor = input.usePinned {
+            aws_byte_cursor_from_array(it.addressOf(offset), length.convert())
+        }
+
+        awsAssertOpSuccess(aws_hash_update(md5, inputCursor)) {
+            "aws_hash_update"
+        }
+    }
+
+    override fun digest(): ByteArray {
+        val output = ByteArray(md5.pointed.digest_size.toInt())
+
+        val byteBuf = output.usePinned {
+            cValue<aws_byte_buf> {
+                capacity = output.size.convert()
+                len = 0U
+                buffer = it.addressOf(0).reinterpret()
+            }
+        }
+
+        awsAssertOpSuccess(aws_hash_finalize(md5, byteBuf, 0U)) { "aws_hash_finalize" }
+
+        return output.also { reset() }
+    }
+
+    override fun reset() {
+        aws_hash_destroy(md5)
+        md5 = checkNotNull(aws_md5_new(Allocator.Default)) { "aws_md5_new" }
+    }
+}

aws-crt-kotlin/native/src/aws/sdk/kotlin/crt/util/hashing/ShaNative.kt

@@ -2,6 +2,8 @@
  * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
  * SPDX-License-Identifier: Apache-2.0
  */
+package aws.sdk.kotlin.crt.util.hashing
+
 import aws.sdk.kotlin.crt.Allocator
 import aws.sdk.kotlin.crt.awsAssertOpSuccess
 import kotlinx.cinterop.*

aws-crt-kotlin/native/test/aws/sdk/kotlin/crt/util/hashing/HashFunctionNativeTest.kt

@@ -2,6 +2,8 @@
  * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
  * SPDX-License-Identifier: Apache-2.0
  */
+package aws.sdk.kotlin.crt.util.hashing
+
 import aws.sdk.kotlin.crt.util.encodeToHex
 import kotlin.test.Test
 import kotlin.test.assertEquals

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 kotlin-version = "2.0.21"
 
-aws-kotlin-repo-tools-version = "0.4.14-kn"
+aws-kotlin-repo-tools-version = "0.4.15-kn"
 
 # libs
 crt-java-version = "0.31.3"