2.0 iOS build

[mpelteshki]

Description

I haven’t really looked into this yet but is building for iOS possible after the code refactor in 2.0?

[majd]

Building the tool for iOS is possible after the Go refactor in version 2.0. The issue is that the library used for interacting with the Keychain (99designs/keyring) is currently throwing errors when building ipatool for iOS. Fixing this is on my TODO list. I'll keep this issue open to track progress.

[Ender890]

Ah, thank you.

[gBasil]

@majd There's a maintained fork of Keyring (ByteNess/keyring) to which I've just submitted a pull request to fix iOS builds: ByteNess/keyring#77. It is not yet merged, but once it is, the library will support iOS builds. I've tested it on the usage example in Keyring's README, and it compiles and runs on iOS.

Just by swapping out Keyring for the forked version with my changes, I've gotten iOS builds of ipatool to work with the following command:

SDKROOT=$(xcrun --sdk iphoneos --show-sdk-path) \
IPHONEOS_DEPLOYMENT_TARGET=10.0 \
GOOS=ios GOARCH=arm64 CGO_ENABLED=1 \
go build -o ipatool

Since I'm running this on a jailbroken iPhone, I also give it the keychain access entitlements with ldid -Sent.xml ipatool, where ent.xml is:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
	<dict>
		<key>keychain-access-groups</key>
		<array>
			<string>*</string>
		</array>
	</dict>
</plist>

(This feels overly permissive, but I'm not sure what the right value here would be.)

However, when actually running it on the device, which is on iOS 12.5, I get errors related to Go's macOS crypto handling logic somehow being pulled into the equation (I'm building ipatool on a mac):

(Apologies for the cut-off screenshot—the error continues for quite a ways, but I'm not sure how to better capture it.)

It seems like the missing symbol is available on iOS 15+, so presumably it will also run on those versions (I haven't tested this), but I'd like to compile it to lower versions and I've been unable to do so. I'm not certain how to resolve this issue, but this is as far as I've gotten.

Edit: the pull request has been merged.