Use ProtonMail's GopenPGP library

This allows for a simpler setup and the usage of a recent version of Go. The library provides a build script which creates an XCFramework containing binaries for multiple target architectures. The gnu-dummy.patch is taken from mssun/gopenpgp. The forks are not needed anymore.

README.md

@@ -46,9 +46,9 @@ For more, please read the [wiki page](https://github.com/mssun/passforios/wiki).
 
 ## Building Pass for iOS
 
-1. Install libtool, automake, cmake, carthage, cocoapods, and go: `brew install libtool automake cmake carthage cocoapods go@1.14 swiftlint swiftformat`. At the moment, the project does not build with current version of go (1.15). Use 1.14
+1. Install Libtool, Automake, CMake, Carthage, CocoaPods, Go, SwiftLint, and SwiftFormat: `brew install libtool automake cmake carthage cocoapods go swiftlint swiftformat`.
-2. Install dependencies via Carthage in the project root directory: `./scripts/wcarthage update` then `./scripts/wcarthage bootstrap --platform iOS`. This may take some time.
+2. Install dependencies via Carthage. Therefore, execute `./scripts/wcarthage update` and `./scripts/wcarthage bootstrap --platform iOS` in the root directory of the project. This may take some time.
-3. Run `./scripts/gopenpgp_build.sh` to build go dependencies.
+3. Run `./scripts/gopenpgp_build.sh` to build GopenPGP.
 4. Install dependencies via CocoaPods in the project root directory: `pod install`.
 5. Open the `pass.xcworkspace` file in Xcode.
 6. Build & Run.

pass.xcodeproj/project.pbxproj

@@ -3,12 +3,12 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 46;
+	objectVersion = 52;
 	objects = {
 
 /* Begin PBXBuildFile section */
-		116F7CC922E134FA003B3BAC /* Crypto.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 116F7CC822E134FA003B3BAC /* Crypto.framework */; };
+		30052851267E9138003E2003 /* Gopenpgp.xcframework in Frameworks */ = {isa = PBXBuildFile; fileRef = 30052850267E9138003E2003 /* Gopenpgp.xcframework */; };
-		116F7CCA22E134FA003B3BAC /* Crypto.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 116F7CC822E134FA003B3BAC /* Crypto.framework */; };
+		30052853267E914C003E2003 /* Gopenpgp.xcframework in Frameworks */ = {isa = PBXBuildFile; fileRef = 30052850267E9138003E2003 /* Gopenpgp.xcframework */; };
 		300713C52219D54100F553AC /* AutoCellHeightUITableViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 300713C42219D54100F553AC /* AutoCellHeightUITableViewController.swift */; };
 		301F6463216162550071A4CE /* AdditionField.swift in Sources */ = {isa = PBXBuildFile; fileRef = 301F6462216162550071A4CE /* AdditionField.swift */; };
 		301F6468216165290071A4CE /* ConstantsTest.swift in Sources */ = {isa = PBXBuildFile; fileRef = 301F6467216165290071A4CE /* ConstantsTest.swift */; };
@@ -286,6 +286,8 @@
 		116F7CC822E134FA003B3BAC /* Crypto.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Crypto.framework; path = go/dist/Crypto.framework; sourceTree = "<group>"; };
 		134DA5B66070BA56678688CF /* Pods_passKit.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_passKit.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		14E955B67C88672AA3A40BA0 /* Pods_passExtension.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_passExtension.framework; sourceTree = BUILT_PRODUCTS_DIR; };
+		3005284A267E5FCF003E2003 /* Gopenpgp.xcframework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xcframework; name = Gopenpgp.xcframework; path = go/gopenpgp/dist/Gopenpgp.xcframework; sourceTree = "<group>"; };
+		30052850267E9138003E2003 /* Gopenpgp.xcframework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xcframework; name = Gopenpgp.xcframework; path = go/dist/Gopenpgp.xcframework; sourceTree = "<group>"; };
 		300713C42219D54100F553AC /* AutoCellHeightUITableViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AutoCellHeightUITableViewController.swift; sourceTree = "<group>"; };
 		301F6462216162550071A4CE /* AdditionField.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AdditionField.swift; sourceTree = "<group>"; };
 		301F6467216165290071A4CE /* ConstantsTest.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ConstantsTest.swift; sourceTree = "<group>"; };
@@ -506,7 +508,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				E813E400BBF3E7E8975EBAEF /* Pods_passKit.framework in Frameworks */,
-				116F7CCA22E134FA003B3BAC /* Crypto.framework in Frameworks */,
+				30052853267E914C003E2003 /* Gopenpgp.xcframework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -545,10 +547,10 @@
 			buildActionMask = 2147483647;
 			files = (
 				A239F5902158C07D00576CBF /* AuthenticationServices.framework in Frameworks */,
-				116F7CC922E134FA003B3BAC /* Crypto.framework in Frameworks */,
 				A260758D1EEC6F34005DB03E /* passKit.framework in Frameworks */,
 				DCC408C71E307DBB00F29B0E /* SVProgressHUD.framework in Frameworks */,
 				3EA2386CD0E9CE2A702A0B3E /* Pods_pass.framework in Frameworks */,
+				30052851267E9138003E2003 /* Gopenpgp.xcframework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -1023,6 +1025,8 @@
 		DC917BED1E2F38C4000FDF54 /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
+				3005284A267E5FCF003E2003 /* Gopenpgp.xcframework */,
+				30052850267E9138003E2003 /* Gopenpgp.xcframework */,
 				A239F58F2158C07D00576CBF /* AuthenticationServices.framework */,
 				DCA671DE1E7A73B100D3ABE1 /* OneTimePassword.framework */,
 				A262A58C1E68749C006B0890 /* Base32.framework */,
@@ -1883,7 +1887,11 @@
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = passShortcuts/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @executable_path/../../Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@executable_path/../../Frameworks",
+				);
 				MARKETING_VERSION = 0.12.0;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
@@ -1912,7 +1920,11 @@
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = passShortcuts/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @executable_path/../../Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@executable_path/../../Frameworks",
+				);
 				MARKETING_VERSION = 0.12.0;
 				MTL_FAST_MATH = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = me.mssun.passforios.shortcuts;
@@ -1983,7 +1995,8 @@
 				PRODUCT_NAME = "Pass Beta";
 				SDKROOT = iphoneos;
 				STRIP_INSTALLED_PRODUCT = NO;
-				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
 				VALIDATE_PRODUCT = YES;
 				WARNING_CFLAGS = "-Wno-incomplete-umbrella";
@@ -2011,7 +2024,10 @@
 				HEADER_SEARCH_PATHS = "$(inherited)";
 				INFOPLIST_FILE = pass/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
 				LIBRARY_SEARCH_PATHS = "$(inherited)";
 				MARKETING_VERSION = 0.12.0;
 				OTHER_CFLAGS = "$(inherited)";
@@ -2037,7 +2053,11 @@
 				HEADER_SEARCH_PATHS = "$(inherited)";
 				INFOPLIST_FILE = passTests/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = "$(PRODUCT_BUNDLE_IDENTIFIER).passTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRIP_INSTALLED_PRODUCT = NO;
@@ -2063,7 +2083,11 @@
 				HEADER_SEARCH_PATHS = "$(inherited)";
 				INFOPLIST_FILE = passExtension/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @executable_path/../../Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@executable_path/../../Frameworks",
+				);
 				LIBRARY_SEARCH_PATHS = "$(inherited)";
 				MARKETING_VERSION = 0.12.0;
 				OTHER_CFLAGS = "$(inherited)";
@@ -2135,7 +2159,11 @@
 				);
 				INFOPLIST_FILE = passKitTests/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = "$(PRODUCT_BUNDLE_IDENTIFIER).passKitTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRIP_INSTALLED_PRODUCT = NO;
@@ -2160,7 +2188,11 @@
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = passAutoFillExtension/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @executable_path/../../Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@executable_path/../../Frameworks",
+				);
 				MARKETING_VERSION = 0.12.0;
 				MTL_FAST_MATH = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = "me.mssun.passforiosbeta.auto-fill-credential-extension";
@@ -2189,7 +2221,11 @@
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = passShortcuts/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @executable_path/../../Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@executable_path/../../Frameworks",
+				);
 				MARKETING_VERSION = 0.12.0;
 				MTL_FAST_MATH = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = me.mssun.passforiosbeta.shortcuts;
@@ -2217,7 +2253,11 @@
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = passAutoFillExtension/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @executable_path/../../Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@executable_path/../../Frameworks",
+				);
 				MARKETING_VERSION = 0.12.0;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
@@ -2247,7 +2287,11 @@
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = passAutoFillExtension/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @executable_path/../../Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@executable_path/../../Frameworks",
+				);
 				MARKETING_VERSION = 0.12.0;
 				MTL_FAST_MATH = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = "me.mssun.passforios.auto-fill-credential-extension";
@@ -2362,7 +2406,11 @@
 				);
 				INFOPLIST_FILE = passKitTests/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = "$(PRODUCT_BUNDLE_IDENTIFIER).passKitTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRIP_INSTALLED_PRODUCT = NO;
@@ -2384,7 +2432,11 @@
 				);
 				INFOPLIST_FILE = passKitTests/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = "$(PRODUCT_BUNDLE_IDENTIFIER).passKitTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRIP_INSTALLED_PRODUCT = NO;
@@ -2410,7 +2462,11 @@
 				HEADER_SEARCH_PATHS = "$(inherited)";
 				INFOPLIST_FILE = passExtension/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @executable_path/../../Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@executable_path/../../Frameworks",
+				);
 				LIBRARY_SEARCH_PATHS = "$(inherited)";
 				MARKETING_VERSION = 0.12.0;
 				OTHER_CFLAGS = "$(inherited)";
@@ -2442,7 +2498,11 @@
 				HEADER_SEARCH_PATHS = "$(inherited)";
 				INFOPLIST_FILE = passExtension/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @executable_path/../../Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@executable_path/../../Frameworks",
+				);
 				LIBRARY_SEARCH_PATHS = "$(inherited)";
 				MARKETING_VERSION = 0.12.0;
 				OTHER_CFLAGS = "$(inherited)";
@@ -2467,7 +2527,11 @@
 				HEADER_SEARCH_PATHS = "$(inherited)";
 				INFOPLIST_FILE = passTests/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = "$(PRODUCT_BUNDLE_IDENTIFIER).passTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRIP_INSTALLED_PRODUCT = NO;
@@ -2486,7 +2550,11 @@
 				HEADER_SEARCH_PATHS = "$(inherited)";
 				INFOPLIST_FILE = passTests/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+					"@loader_path/Frameworks",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = "$(PRODUCT_BUNDLE_IDENTIFIER).passTests";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				STRIP_INSTALLED_PRODUCT = NO;
@@ -2625,7 +2693,8 @@
 				PRODUCT_NAME = Pass;
 				SDKROOT = iphoneos;
 				STRIP_INSTALLED_PRODUCT = NO;
-				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
 				VALIDATE_PRODUCT = YES;
 				WARNING_CFLAGS = "-Wno-incomplete-umbrella";
@@ -2653,7 +2722,10 @@
 				HEADER_SEARCH_PATHS = "$(inherited)";
 				INFOPLIST_FILE = pass/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
 				LIBRARY_SEARCH_PATHS = "$(inherited)";
 				MARKETING_VERSION = 0.12.0;
 				OTHER_CFLAGS = "$(inherited)";
@@ -2690,7 +2762,10 @@
 				HEADER_SEARCH_PATHS = "$(inherited)";
 				INFOPLIST_FILE = pass/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
 				LIBRARY_SEARCH_PATHS = "$(inherited)";
 				MARKETING_VERSION = 0.12.0;
 				OTHER_CFLAGS = "$(inherited)";

passKit/Crypto/GopenPGPInterface.swift

@@ -6,12 +6,12 @@
 //  Copyright © 2019 Bob Sun. All rights reserved.
 //
 
-import Crypto
+import Gopenpgp
 
 struct GopenPGPInterface: PGPInterface {
     private static let errorMapping: [String: Error] = [
         "gopenpgp: error in unlocking key: openpgp: invalid data: private key checksum failure": AppError.wrongPassphrase,
-        "openpgp: incorrect key": AppError.keyExpiredOrIncompatible,
+        "gopenpgp: error in reading message: openpgp: incorrect key": AppError.keyExpiredOrIncompatible,
     ]
 
     private var publicKeys: [String: CryptoKey] = [:]

passKitTests/Crypto/CryptoFrameworkTest.swift

@@ -10,7 +10,7 @@ import XCTest
 
 // swiftformat:disable:next sortedImports
 @testable import passKit
-@testable import Crypto
+@testable import Gopenpgp
 
 class CryptoFrameworkTest: XCTestCase {
     private typealias MessageConverter = (CryptoPGPMessage, NSErrorPointer) -> CryptoPGPMessage?

patch/gnu-dummy.patch

@@ -0,0 +1,32 @@
+diff --git a/crypto/key.go b/crypto/key.go
+index 49af11e..fd59ec4 100644
+--- a/crypto/key.go
++++ b/crypto/key.go
+@@ -150,10 +150,12 @@ func (key *Key) Unlock(passphrase []byte) (*Key, error) {
+ 		return nil, err
+ 	}
+ 
+-	err = unlockedKey.entity.PrivateKey.Decrypt(passphrase)
+-	if err != nil {
+-		return nil, errors.Wrap(err, "gopenpgp: error in unlocking key")
+-	}
++	if !unlockedKey.entity.PrivateKey.Dummy() {
++        err = unlockedKey.entity.PrivateKey.Decrypt(passphrase)
++        if err != nil {
++            return nil, errors.Wrap(err, "gopenpgp: error in unlocking key")
++        }
++    }
+ 
+ 	for _, sub := range unlockedKey.entity.Subkeys {
+ 		if sub.PrivateKey != nil {
+@@ -286,6 +288,10 @@ func (key *Key) IsLocked() (bool, error) {
+ 		}
+ 	}
+ 
++    if key.entity.PrivateKey.Dummy() {
++        return true, nil
++    }
++
+ 	return key.entity.PrivateKey.Encrypted, nil
+ }
+ 

scripts/gopenpgp_build.sh

@@ -2,27 +2,29 @@
 
 set -euox pipefail
 
+GOPENPGP_VERSION="v2.1.10"
+
 export GOPATH="$(pwd)/go"
 export PATH="$PATH:$GOPATH/bin"
 
-PACKAGE_PATH="github.com/mssun/gopenpgp"
+OUTPUT_PATH="go/dist"
-GOPENPGP_REVISION="gnu-dummy"
+CHECKOUT_PATH="go/checkout"
-OUTPUT_PATH="$GOPATH/dist"
+GOPENPGP_PATH="$CHECKOUT_PATH/gopenpgp"
-
-mkdir -p "$GOPATH"
-
-go get golang.org/x/mobile/cmd/gomobile || true
-( cd "$GOPATH/src/golang.org/x/mobile/cmd/gomobile" && git checkout 0df4eb2385467a487d418c6358313e9e838256ae )
-GO111MODULE=on go get golang.org/x/mobile/cmd/gomobile@0df4eb2385467a487d418c6358313e9e838256ae || true
-GO111MODULE=on go get golang.org/x/mobile/cmd/gobind@0df4eb2385467a487d418c6358313e9e838256ae || true
-go get -u "$PACKAGE_PATH" || true
-
-mkdir -p "$GOPATH/src/github.com/ProtonMail"
-ln -f -s "$GOPATH/src/$PACKAGE_PATH" "$GOPATH/src/github.com/ProtonMail/gopenpgp"
-
-( cd "$GOPATH/src/$PACKAGE_PATH" && git checkout "$GOPENPGP_REVISION" && GO111MODULE=on go mod vendor )
 
 mkdir -p "$OUTPUT_PATH"
+mkdir -p "$CHECKOUT_PATH"
+
+go env -w GO111MODULE=auto
+go get golang.org/x/mobile/cmd/gomobile
+gomobile init
+
+git clone --depth 1 --branch "$GOPENPGP_VERSION" git@github.com:ProtonMail/gopenpgp.git "$GOPENPGP_PATH"
+
+git apply patch/gnu-dummy.patch --directory "$GOPENPGP_PATH"
+
+sed -i '' 's/build android/echo "Skipping Android build."/g' "$GOPENPGP_PATH/build.sh"
+
+(cd "$GOPENPGP_PATH" && ./build.sh)
+
+cp -R "$GOPENPGP_PATH/dist/Gopenpgp.xcframework" "$OUTPUT_PATH"
 
-"$GOPATH/bin/gomobile" bind -v -ldflags="-s -w" -target ios -o "${OUTPUT_PATH}/Crypto.framework" \
-    "$PACKAGE_PATH"/{crypto,armor,constants,models,subtle}