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Add namespaced UUIDs v3 and v5 (benasher44#87)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| package com.benasher44.uuid | ||
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| import kotlinx.cinterop.addressOf | ||
| import kotlinx.cinterop.reinterpret | ||
| import kotlinx.cinterop.usePinned | ||
| import platform.CoreCrypto.CC_MD5 | ||
| import platform.CoreCrypto.CC_MD5_DIGEST_LENGTH | ||
| import platform.CoreCrypto.CC_SHA1 | ||
| import platform.CoreCrypto.CC_SHA1_DIGEST_LENGTH | ||
|
|
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| /** | ||
| * Constructs a "Name-Based" version 3 [UUID][Uuid]. | ||
| * | ||
| * Version 3 UUIDs are created by combining a name and | ||
| * a namespace using the MD5 hash function. | ||
| * | ||
| * @param namespace for the "Name-Based" UUID | ||
| * @param name withing the namespace for the "Name-Based" UUID | ||
| * @return New version 3 [UUID][Uuid]. | ||
| * @see <a href="https://tools.ietf.org/html/rfc4122#section-4.3">RFC 4122: Section 4.3</a> | ||
| */ | ||
| @ExperimentalStdlibApi | ||
| public fun uuid3Of(namespace: Uuid, name: String): Uuid = | ||
| nameBasedUuidOf(namespace, name, AppleHasher(AppleHasher.Companion::md5Digest, 3)) | ||
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| /** | ||
| * Constructs a "Name-Based" version 5 [UUID][Uuid]. | ||
| * | ||
| * Version 5 UUIDs are created by combining a name and | ||
| * a namespace using the SHA-1 hash function. | ||
| * | ||
| * @param namespace for the "Name-Based" UUID | ||
| * @param name withing the namespace for the "Name-Based" UUID | ||
| * @return New version 5 [UUID][Uuid]. | ||
| * @see <a href="https://tools.ietf.org/html/rfc4122#section-4.3">RFC 4122: Section 4.3</a> | ||
| */ | ||
| @ExperimentalStdlibApi | ||
| public fun uuid5Of(namespace: Uuid, name: String): Uuid = | ||
| nameBasedUuidOf(namespace, name, AppleHasher(AppleHasher.Companion::sha1Digest, 5)) | ||
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|
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| private class AppleHasher( | ||
| private val digestFunc: (ByteArray) -> ByteArray, | ||
| override val version: Int | ||
| ) : UuidHasher { | ||
| private var data = ByteArray(0) | ||
|
|
||
| override fun update(input: ByteArray) { | ||
| val prevLength = data.size | ||
| data = data.copyOf(data.size + input.size) | ||
| input.copyInto(data, prevLength) | ||
| } | ||
|
|
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| override fun digest(): ByteArray { | ||
| return digestFunc(data) | ||
| } | ||
|
|
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| companion object { | ||
| fun sha1Digest(data: ByteArray): ByteArray { | ||
| return ByteArray(CC_SHA1_DIGEST_LENGTH).also { bytes -> | ||
| bytes.usePinned { digestPin -> | ||
| data.usePinned { dataPin -> | ||
| CC_SHA1(dataPin.addressOf(0), data.size.toUInt(), digestPin.addressOf(0).reinterpret()) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fun md5Digest(data: ByteArray): ByteArray { | ||
| return ByteArray(CC_MD5_DIGEST_LENGTH).also { bytes -> | ||
| bytes.usePinned { digestPin -> | ||
| data.usePinned { dataPin -> | ||
| CC_MD5(dataPin.addressOf(0), data.size.toUInt(), digestPin.addressOf(0).reinterpret()) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| package com.benasher44.uuid | ||
|
|
||
| import kotlin.native.concurrent.isFrozen | ||
| import kotlin.test.Test | ||
| import kotlin.test.assertEquals | ||
| import kotlin.test.assertTrue | ||
| import kotlinx.cinterop.ByteVar | ||
| import kotlinx.cinterop.addressOf | ||
| import kotlinx.cinterop.memScoped | ||
| import kotlinx.cinterop.readBytes | ||
| import kotlinx.cinterop.reinterpret | ||
| import kotlinx.cinterop.usePinned | ||
| import platform.Foundation.NSData | ||
| import platform.Foundation.NSUUID | ||
| import platform.Foundation.dataWithContentsOfFile | ||
|
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||
| @ExperimentalStdlibApi | ||
| class CocoaUuidTest { | ||
| @Test | ||
| fun `UUID.toString() matches NSUUID`() { | ||
| val uuidL = uuid4() | ||
| val nativeUuidString = uuidL.bytes.usePinned { | ||
| NSUUID(it.addressOf(0).reinterpret()).UUIDString | ||
| }.toLowerCase() | ||
| assertEquals(uuidL.toString(), nativeUuidString) | ||
| } | ||
|
|
||
| @Test | ||
| fun `UUID bytes match NSUUID`() { | ||
| val uuidL = uuid4() | ||
| val nativeUuid = NSUUID(uuidL.toString()) | ||
| val nativeBytes = ByteArray(UUID_BYTES) | ||
| nativeBytes.usePinned { | ||
| nativeUuid.getUUIDBytes(it.addressOf(0).reinterpret()) | ||
| } | ||
| assertTrue(uuidL.bytes.contentEquals(nativeBytes)) | ||
| } | ||
|
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| @Test | ||
| fun `UUID is frozen after initialization`() { | ||
| assertTrue(uuid4().isFrozen) | ||
| } | ||
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| @Test | ||
| fun `test uuid5`() { | ||
| enumerateUuid5Data { namespace, name, result -> | ||
| assertEquals(result, uuid5Of(namespace, name)) | ||
| } | ||
| } | ||
|
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| @Test | ||
| fun `test uuid3`() { | ||
| enumerateUuid3Data { namespace, name, result -> | ||
| assertEquals(result, uuid3Of(namespace, name)) | ||
| } | ||
| } | ||
| } | ||
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| private fun enumerateUuid3Data(enumerationLambda: (namespace: Uuid, name: String, result: Uuid) -> Unit) { | ||
| enumerateData("src/commonTest/data/uuid3.txt", enumerationLambda) | ||
| } | ||
|
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| private fun enumerateUuid5Data(enumerationLambda: (namespace: Uuid, name: String, result: Uuid) -> Unit) { | ||
| enumerateData("src/commonTest/data/uuid5.txt", enumerationLambda) | ||
| } | ||
|
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| private fun enumerateData(path: String, enumerationLambda: (namespace: Uuid, name: String, result: Uuid) -> Unit) { | ||
| val data = NSData.dataWithContentsOfFile("$PROJECT_DIR_ROOT/$path")!! | ||
| val str = memScoped { | ||
| data.bytes!!.getPointer(this) | ||
| .reinterpret<ByteVar>() | ||
| .readBytes(data.length.toInt()) | ||
| .decodeToString() | ||
| } | ||
| for (row in str.split("\n")) { | ||
| if (row.isEmpty()) continue | ||
| val (namespaceStr, name, resultStr) = row.split(",") | ||
| enumerationLambda(uuidFrom(namespaceStr), name, uuidFrom(resultStr)) | ||
| } | ||
| } |
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