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Error handling and very basic libfido2 CBOR-info support
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124 changes: 124 additions & 0 deletions
124
library/src/nativeMain/kotlin/us/q3q/fidok/fido2compat/Info.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| @file:OptIn(ExperimentalForeignApi::class, ExperimentalNativeApi::class) | ||
| @file:Suppress("FunctionName", "unused", "LocalVariableName") | ||
|
|
||
| package us.q3q.fidok.fido2compat | ||
|
|
||
| import kotlinx.cinterop.ByteVar | ||
| import kotlinx.cinterop.CArrayPointer | ||
| import kotlinx.cinterop.COpaquePointer | ||
| import kotlinx.cinterop.CPointer | ||
| import kotlinx.cinterop.CPointerVar | ||
| import kotlinx.cinterop.CPointerVarOf | ||
| import kotlinx.cinterop.ExperimentalForeignApi | ||
| import kotlinx.cinterop.StableRef | ||
| import kotlinx.cinterop.allocArray | ||
| import kotlinx.cinterop.asStableRef | ||
| import kotlinx.cinterop.convert | ||
| import kotlinx.cinterop.cstr | ||
| import kotlinx.cinterop.get | ||
| import kotlinx.cinterop.getBytes | ||
| import kotlinx.cinterop.nativeHeap | ||
| import kotlinx.cinterop.pointed | ||
| import kotlinx.cinterop.set | ||
| import kotlinx.cinterop.value | ||
| import platform.posix.size_t | ||
| import us.q3q.fidok.ctap.commands.GetInfoResponse | ||
| import kotlin.experimental.ExperimentalNativeApi | ||
| import kotlin.native.ref.createCleaner | ||
|
|
||
| typealias fido_info_t = COpaquePointer | ||
|
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| class FidoInfoHandle( | ||
| var info: GetInfoResponse? = null, | ||
| var nativeInfoPtr: CArrayPointer<CPointerVar<ByteVar>>? = null, | ||
| ) | ||
|
|
||
| @OptIn(ExperimentalForeignApi::class) | ||
| @CName("fido_cbor_info_new") | ||
| fun fido_cbor_info_new(): COpaquePointer { | ||
| val infoHandle = FidoInfoHandle() | ||
| return StableRef.create(infoHandle).asCPointer() | ||
| } | ||
|
|
||
| @OptIn(ExperimentalForeignApi::class) | ||
| @CName("fido_cbor_info_free") | ||
| fun fido_cbor_info_free(ci_p: CPointer<CPointerVarOf<fido_info_t>>?) { | ||
| val stableRef = ci_p?.pointed?.value ?: return | ||
| val target = stableRef.asStableRef<FidoInfoHandle>() | ||
| target.dispose() | ||
| ci_p.pointed.value = null | ||
| } | ||
|
|
||
| @OptIn(ExperimentalForeignApi::class) | ||
| @CName("fido_dev_get_cbor_info") | ||
| fun fido_dev_get_cbor_info( | ||
| dev: fido_dev_t, | ||
| ci: fido_info_t, | ||
| ): Int { | ||
| val devHandle = dev.asStableRef<FidoDevHandle>().get() | ||
| val infoHandle = ci.asStableRef<FidoInfoHandle>().get() | ||
|
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| val authenticator = devHandle.authenticatorDevice ?: return FIDO_ERR_TX | ||
|
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| val client = | ||
| get_fidocompat_lib().ctapClient( | ||
| authenticator, | ||
| ) | ||
|
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| return fido_do_with_error_handling { | ||
| infoHandle.info = client.getInfo() | ||
| } | ||
| } | ||
|
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| internal fun cleanUpNativeInfoAlloc(handle: FidoInfoHandle) { | ||
| val extensionsInPlace = handle.info?.extensions | ||
| val nativePtr = handle.nativeInfoPtr | ||
| handle.nativeInfoPtr = null | ||
| if (extensionsInPlace != null && nativePtr != null) { | ||
| for (i in extensionsInPlace.indices) { | ||
| val ptr = nativePtr[i] | ||
| if (ptr != null) { | ||
| nativeHeap.free(ptr.rawValue) | ||
| } | ||
| } | ||
| nativeHeap.free(nativePtr.rawValue) | ||
| } | ||
| } | ||
|
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| @OptIn(ExperimentalForeignApi::class) | ||
| @CName("fido_cbor_info_extensions_ptr") | ||
| fun fido_cbor_info_extensions_ptr(ci: fido_info_t): CPointerVarOf<CPointer<ByteVar>>? { | ||
| val infoHandle = ci.asStableRef<FidoInfoHandle>().get() | ||
|
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| val extensions = infoHandle.info?.extensions ?: return null | ||
|
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| val extensionsPtr = nativeHeap.allocArray<CPointerVar<ByteVar>>(extensions.size) | ||
|
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| for (i in extensions.indices) { | ||
| val cstr = extensions[i].cstr | ||
| val heapAlloc = nativeHeap.allocArray<ByteVar>(cstr.size) | ||
| for (j in 0..<cstr.size) { | ||
| heapAlloc[j] = cstr.getBytes()[j] | ||
| } | ||
| extensionsPtr[i] = heapAlloc | ||
| } | ||
|
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| if (infoHandle.nativeInfoPtr == null) { | ||
| createCleaner(infoHandle) { | ||
| cleanUpNativeInfoAlloc(it) | ||
| } | ||
| } else { | ||
| cleanUpNativeInfoAlloc(infoHandle) | ||
| } | ||
| infoHandle.nativeInfoPtr = extensionsPtr | ||
|
|
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| return extensionsPtr.pointed | ||
| } | ||
|
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| @OptIn(ExperimentalForeignApi::class) | ||
| @CName("fido_cbor_info_extensions_len") | ||
| fun fido_cbor_info_extensions_len(ci: fido_info_t): size_t { | ||
| val infoHandle = ci.asStableRef<FidoInfoHandle>().get() | ||
|
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| return infoHandle.info?.extensions?.size?.convert() ?: 0.convert() | ||
| } |
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