Don't look at decryption algorithm in yubikey specific code

[jcgruenhage]

• Fix typo in yubikey deciphering error message
• Don't look at decryption algorithm in yubikey specific code

I'm new to the Apple Ecosystem. I've tried building this locally, but can't get past ./gomobile: -target="ios" requires Xcode, even though XCode is installed.

Corresponding issue #696

[jcgruenhage]

@mssun can you take a look? I'd love to be able to use this app, but this keeps me from doing so right now.

[SimplyDanny]

I'm new to the Apple Ecosystem. I've tried building this locally, but can't get past ./gomobile: -target="ios" requires Xcode, even though XCode is installed.

I can't judge the code changes, but I can probably help you with the build issue. Did you run ./scripts/gopenpgp_build.sh and it failed? Can you provide the error message?

As for Xcode, make sure that your installation is selected using xcode-select -s <path>.

[jcgruenhage]

Regarding Xcode:

passforios on  misc-2025-06-27 via 💎 v2.6.10 took 10s
❯ xcode-select --install
xcode-select: note: Command line tools are already installed. Use "Software Update" in System Settings or the softwareupdate command line interface to install updates

passforios on  misc-2025-06-27 via 💎 v2.6.10
❯ xcode-select --version
xcode-select version 2409.

passforios on  misc-2025-06-27 via 💎 v2.6.10
❯ xcode-select --print-path
/Library/Developer/CommandLineTools

The full log of that script:

+ GOPENPGP_VERSION=v2.8.1-passforios
++ pwd
+ export GOPATH=/Users/jc.gruenhage/dev/other/github.com/jcgruenhage/passforios/go
+ GOPATH=/Users/jc.gruenhage/dev/other/github.com/jcgruenhage/passforios/go
+ export PATH=/opt/homebrew/bin:/opt/homebrew/sbin:/Users/jc.gruenhage/.cargo/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/Ghostty.app/Contents/MacOS:/usr/local/bin:/Users/jc.gruenhage/.local/bin:/Users/jc.gruenhage/dev/other/github.com/jcgruenhage/passforios/go/bin
+ PATH=/opt/homebrew/bin:/opt/homebrew/sbin:/Users/jc.gruenhage/.cargo/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/Ghostty.app/Contents/MacOS:/usr/local/bin:/Users/jc.gruenhage/.local/bin:/Users/jc.gruenhage/dev/other/github.com/jcgruenhage/passforios/go/bin
+ OUTPUT_PATH=go/dist
+ CHECKOUT_PATH=go/checkout
+ GOPENPGP_PATH=go/checkout/gopenpgp
+ mkdir -p go/dist
+ mkdir -p go/checkout
+ git clone --depth 1 --branch v2.8.1-passforios https://github.com/mssun/gopenpgp.git go/checkout/gopenpgp
Cloning into 'go/checkout/gopenpgp'...
remote: Enumerating objects: 154, done.
remote: Counting objects: 100% (154/154), done.
remote: Compressing objects: 100% (149/149), done.
remote: Total 154 (delta 4), reused 88 (delta 0), pack-reused 0 (from 0)
Receiving objects: 100% (154/154), 184.81 KiB | 3.49 MiB/s, done.
Resolving deltas: 100% (4/4), done.
+ pushd go/checkout/gopenpgp
~/dev/other/github.com/jcgruenhage/passforios/go/checkout/gopenpgp ~/dev/other/github.com/jcgruenhage/passforios
+ mkdir -p dist
+ go get golang.org/x/mobile/cmd/gomobile@latest
go: downloading golang.org/x/mobile v0.0.0-20250711185624-d5bb5ecc55c0
go: downloading golang.org/x/mod v0.26.0
go: downloading golang.org/x/sync v0.16.0
go: downloading golang.org/x/tools v0.35.0
go: downloading golang.org/x/sys v0.34.0
go: upgraded go 1.17 => 1.23.0
go: added toolchain go1.24.5
go: added golang.org/x/mobile v0.0.0-20250711185624-d5bb5ecc55c0
go: upgraded golang.org/x/mod v0.8.0 => v0.26.0
go: upgraded golang.org/x/sync v0.1.0 => v0.16.0
go: upgraded golang.org/x/sys v0.16.0 => v0.34.0
go: upgraded golang.org/x/tools v0.6.0 => v0.35.0
+ go get golang.org/x/mobile/cmd/gobind@latest
+ go build golang.org/x/mobile/cmd/gomobile
+ go build golang.org/x/mobile/cmd/gobind
+ go mod download github.com/ProtonMail/go-crypto
+ ./gomobile init
+ ./gomobile bind -tags mobile -target ios -iosversion 13.0 -v -x '-ldflags=-s -w' -o dist/Gopenpgp.xcframework github.com/ProtonMail/gopenpgp/v2/crypto github.com/ProtonMail/gopenpgp/v2/armor github.com/ProtonMail/gopenpgp/v2/constants github.com/ProtonMail/gopenpgp/v2/models github.com/ProtonMail/gopenpgp/v2/subtle github.com/ProtonMail/gopenpgp/v2/helper
GOMOBILE=/Users/jc.gruenhage/dev/other/github.com/jcgruenhage/passforios/go/pkg/gomobile
WORK=/var/folders/n5/kwhvyzld3tj5l3p6wkzll57r0000gp/T/gomobile-work-245275974
rm -r -f "$WORK"
./gomobile: -target="ios" requires Xcode

[SimplyDanny]

passforios on  misc-2025-06-27 via 💎 v2.6.10
❯ xcode-select --print-path
/Library/Developer/CommandLineTools

That's exactly the problem. CommandLineTools brings only basic tools but is not sufficient to develop apps. You need to install a full Xcode and select it.

[jcgruenhage]

That was it, yes. It builds successfully, but I can't test the changes on my device: Personal development teams, including "<my name>", do not support the Siri and Near Field Communication Tag Reading capabilities. Without the ability to use NFC, I can't test the changes..

Maybe it'd be possible to get this into testflight?

[SimplyDanny]

Maybe it'd be possible to get this into testflight?

This is something @mssun needs to decide.

[jcgruenhage]

I have gotten access to a developer team, allowing me to test this: It does not work. Instead of failing in the app, the smartcard says that the data it receives is not correct.

I haven't looked further yet, will update the PR once I do.