feat: Migrate to SwiftAsn1

.github/workflows/pull_request.yml

@@ -0,0 +1,61 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  macos:
+    name: macOS (Build & Test)
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build
+        run: swift build -v
+      - name: Test
+        run: swift test -v
+
+  ios:
+    name: iOS (Build & Test)
+    runs-on: macos-26
+    steps:
+      - uses: actions/checkout@v4
+      - name: List available simulators
+        run: |
+          xcrun simctl list devices
+          xcodebuild -showsdks
+      - name: Build
+        run: xcodebuild build -scheme TPInAppReceipt -destination 'platform=iOS Simulator,OS=latest,name=iPhone 17' -skipPackagePluginValidation SWIFT_STRICT_CONCURRENCY=targeted
+      - name: Test
+        run: xcodebuild test -scheme TPInAppReceipt -destination 'platform=iOS Simulator,OS=latest,name=iPhone 17' -skipPackagePluginValidation SWIFT_STRICT_CONCURRENCY=targeted
+
+  linux:
+    name: Linux (Build & Test)
+    runs-on: ubuntu-latest
+    container: swift:6.0
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Show Swift & OS info
+        run: |
+          swift --version
+          uname -a
+
+      - name: Restore swift package cache
+        uses: actions/cache@v4
+        with:
+          path: |
+            .build
+            .swiftpm
+          key: ${{ runner.os }}-swift-${{ hashFiles('**/Package.resolved') }}
+
+      - name: Resolve Packages
+        run: swift package resolve -v
+
+      - name: Build
+        run: swift build -v
+
+      - name: Test
+        run: swift test -v

.gitignore

@@ -1,74 +1,13 @@
-# Xcode
-#
-# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
-
-## Build generated
-build/
-DerivedData/
-Packages/
-iOS Example/ViewController.swift 
-
-## Various settings
-*.pbxuser
-!default.pbxuser
-*.mode1v3
-!default.mode1v3
-*.mode2v3
-!default.mode2v3
-*.perspectivev3
-!default.perspectivev3
+.DS_Store
+/.build
+/Packages
+/*.xcodeproj
 xcuserdata/
-
-## Other
-*.moved-aside
-*.xcuserstate
-
-## Obj-C/Swift specific
-*.hmap
-*.ipa
-*.dSYM.zip
-*.dSYM
-
-## Playgrounds
-timeline.xctimeline
-playground.xcworkspace
-
-# Swift Package Manager
-#
-# Add this line if you want to avoid checking in source code from Swift Package Manager dependencies.
-# Packages/
-.build/
-
-# CocoaPods
-#
-# We recommend against adding the Pods directory to your .gitignore. However
-# you should judge for yourself, the pros and cons are mentioned at:
-# https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
-#
-# Pods/
-
-# Carthage
-#
-# Add this line if you want to avoid checking in source code from Carthage dependencies.
-# Carthage/Checkouts
-
-Carthage/Build
-
-# fastlane
-#
-# It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the
-# screenshots whenever they are needed.
-# For more information about the recommended setup visit:
-# https://github.com/fastlane/fastlane/blob/master/fastlane/docs/Gitignore.md
-
-fastlane/report.xml
-fastlane/Preview.html
-fastlane/screenshots
-fastlane/test_output
-
-# AppCode
-.idea
-
-TPInAppReceiptTests/MyDevice.swift
-
-.swiftpm/	
+DerivedData/
+.swiftpm/config/registries.json
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+.netrc
+Package.resolved
+.swiftpm
+/out
+.claude

.spi.yml

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+version: 1
+builder:
+  configs:
+    - documentation_targets: [TPInAppReceipt]

.swift-format

@@ -0,0 +1,58 @@
+{
+  "fileScopedDeclarationPrivacy" : {
+    "accessLevel" : "private"
+  },
+  "indentation" : {
+    "spaces" : 4
+  },
+  "indentConditionalCompilationBlocks" : false,
+  "indentSwitchCaseLabels" : false,
+  "lineBreakAroundMultilineExpressionChainComponents" : false,
+  "lineBreakBeforeControlFlowKeywords" : false,
+  "lineBreakBeforeEachArgument" : true,
+  "lineBreakBeforeEachGenericRequirement" : true,
+  "lineLength" : 120,
+  "maximumBlankLines" : 1,
+  "prioritizeKeepingFunctionOutputTogether" : true,
+  "respectsExistingLineBreaks" : true,
+  "rules" : {
+    "AllPublicDeclarationsHaveDocumentation" : false,
+    "AlwaysUseLowerCamelCase" : false,
+    "AmbiguousTrailingClosureOverload" : true,
+    "BeginDocumentationCommentWithOneLineSummary" : false,
+    "DoNotUseSemicolons" : true,
+    "DontRepeatTypeInStaticProperties" : true,
+    "FileScopedDeclarationPrivacy" : true,
+    "FullyIndirectEnum" : true,
+    "GroupNumericLiterals" : true,
+    "IdentifiersMustBeASCII" : true,
+    "NeverForceUnwrap" : false,
+    "NeverUseForceTry" : false,
+    "NeverUseImplicitlyUnwrappedOptionals" : false,
+    "NoAccessLevelOnExtensionDeclaration" : true,
+    "NoAssignmentInExpressions" : true,
+    "NoBlockComments" : true,
+    "NoCasesWithOnlyFallthrough" : true,
+    "NoEmptyTrailingClosureParentheses" : true,
+    "NoLabelsInCasePatterns" : false,
+    "NoLeadingUnderscores" : false,
+    "NoParensAroundConditions" : true,
+    "NoVoidReturnOnFunctionSignature" : true,
+    "OneCasePerLine" : true,
+    "OneVariableDeclarationPerLine" : true,
+    "OnlyOneTrailingClosureArgument" : true,
+    "OrderedImports" : false,
+    "ReturnVoidInsteadOfEmptyTuple" : true,
+    "UseEarlyExits" : true,
+    "UseLetInEveryBoundCaseVariable" : false,
+    "UseShorthandTypeNames" : true,
+    "UseSingleLinePropertyGetter" : false,
+    "UseSynthesizedInitializer" : false,
+    "UseTripleSlashForDocumentationComments" : true,
+    "UseWhereClausesInForLoops" : false,
+    "ValidateDocumentationComments" : false
+  },
+  "spacesAroundRangeFormationOperators" : false,
+  "tabWidth" : 4,
+  "version" : 1
+}

CHANGELOG.md

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+# Changelog
+
+## 4.0.0
+
+### Breaking Changes
+
+- `InAppReceipt` class replaced by `AppReceipt` typealias over `ContentInfo<SignedData<InAppReceiptPayload>>`
+- Sync validation (`try receipt.verify()`) replaced by async (`await receipt.validate()`)
+- Error types renamed: `IARError` → `AppReceiptError`, `ReceiptValidatorError`
+- `originalAppVersion` is now `String?` (was `String`)
+- `ageRating` is now `String?` (was `String`)
+- Minimum platforms raised: iOS 13+, macOS 10.15+, tvOS 13+
+- Swift tools version: 6.0
+- Removed Objective-C support
+- Removed CocoaPods support
+
+### New
+
+- Full PKCS#7 structure: `ContentInfo`, `SignedData`, `EncapsulatedContentInfo`, `SignerInfo`, `AlgorithmIdentifier`, etc.
+- Composable validation via `@VerifierBuilder` and `ReceiptValidator`
+- X.509 certificate chain verification using swift-certificates
+- Signature verification using swift-crypto
+- New receipt fields: `environment`, `appStoreID`, `transactionDate`, `fulfillmentToolVersion`, `developerID`, `downloadID`, `installerVersionID`
+- `InAppReceiptPayload.Environment` enum (`.production`, `.sandbox`, `.xcode`, `.productionSandbox`)
+- `InAppPurchase.Type` enum (`.consumable`, `.nonConsumable`, `.autoRenewableSubscription`, `.nonRenewingSubscription`)
+- Blocking API via `@_spi(Blocking)`: `local_blocking`, `validate_blocking()`
+- Pluggable decoder via `AppReceiptDecoder.Engine` protocol
+- DocC documentation
+- Privacy manifest (`PrivacyInfo.xcprivacy`)
+- visionOS support
+
+### Dependencies
+
+- Removed: ASN1Swift
+- Added: [swift-asn1](https://github.com/apple/swift-asn1) 1.5.0+, [swift-certificates](https://github.com/apple/swift-certificates) 1.15.1+, [swift-crypto](https://github.com/apple/swift-crypto) 4.2.0+

CONTRIBUTING.md

@@ -1,13 +1,54 @@
 # Contributing to TPInAppReceipt
 
-### All contributions to TPInAppReceipt are welcome.
+Thank you for your interest in contributing to TPInAppReceipt! This document provides guidelines and instructions for contributing.
 
-If you want to help developing TPInAppReceipt, please take a look for any opened issue or you can introduce a new functionality.
+## Reporting Bugs
 
-### Increase unit test coverage
+If you find a bug, please open an issue on [GitHub Issues](https://github.com/tikhop/TPInAppReceipt/issues) with:
 
-Additional unit test coverage is welcome.
+- A clear, descriptive title
+- Steps to reproduce the issue
+- Expected behavior vs actual behavior
+- Swift version and platform information
+- Minimal code example if possible
 
-## Issues
+## Suggesting Features
 
-If TPInAppReceipt doesn't work as you expect, please review [any open issues](https://github.com/tikhop/TPInAppReceipt/issues) before opening a new one.
+Feature requests are welcome! Please open an issue with:
+
+- A clear description of the feature
+- Use cases and motivation
+- Any implementation ideas you may have
+
+## Pull Request Process
+
+1. Fork the repository and create your branch from `master`
+2. Make your changes and ensure tests pass
+3. Add tests for any new functionality
+4. Update documentation if needed
+5. Submit a pull request with a clear description of your changes
+
+### PR Guidelines
+
+- Keep changes focused and atomic
+- Follow existing code patterns
+- Ensure all tests pass before submitting
+
+## Code Style
+
+This project follows Swift conventions. Please reference `.swift-format` for formatting guidelines.
+
+To format all files: `swift format -i . --recursive`
+
+Key points:
+- Keep lines reasonably short
+- Use meaningful variable and function names
+
+## Testing Requirements
+
+All contributions should include appropriate tests:
+
+- Run existing tests with `swift test`
+- Add unit tests for new functionality
+
+Thank you for contributing!

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2016-present Pavel Tikhoneko
+Copyright (c) 2016-Present Pavel Tikhonenko
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal