mirror of
https://github.com/revanced/revanced-patcher.git
synced 2025-05-07 23:54:25 +02:00
refactor!: move utility methods from MethodFingerprintUtils MethodFingerprint
BREAKING CHANGE: Imports will have to be updated from `MethodFingerprintUtils` to `MethodFingerprint.Companion`. Signed-off-by: oSumAtrIX <johan.melkonyan1@web.de>
This commit is contained in:
oSumAtrIX
parent
90fc547673
commit
d802ef844e
@ -8,7 +8,7 @@ import app.revanced.patcher.extensions.PatchExtensions.deprecated
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import app.revanced.patcher.extensions.PatchExtensions.patchName
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import app.revanced.patcher.extensions.PatchExtensions.sincePatcherVersion
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import app.revanced.patcher.extensions.nullOutputStream
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import app.revanced.patcher.fingerprint.method.utils.MethodFingerprintUtils.resolve
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import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint.Companion.resolve
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import app.revanced.patcher.patch.Patch
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import app.revanced.patcher.patch.PatchResult
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import app.revanced.patcher.patch.PatchResultError
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@ -1,13 +1,19 @@
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package app.revanced.patcher.fingerprint.method.impl
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import app.revanced.patcher.data.impl.BytecodeData
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import app.revanced.patcher.extensions.MethodFingerprintExtensions.fuzzyPatternScanMethod
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import app.revanced.patcher.extensions.MethodFingerprintExtensions.fuzzyScanThreshold
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import app.revanced.patcher.extensions.parametersEqual
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import app.revanced.patcher.extensions.softCompareTo
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import app.revanced.patcher.fingerprint.Fingerprint
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import app.revanced.patcher.fingerprint.method.utils.MethodFingerprintUtils
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import app.revanced.patcher.fingerprint.method.annotation.FuzzyPatternScanMethod
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import app.revanced.patcher.util.proxy.ClassProxy
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import org.jf.dexlib2.Opcode
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import org.jf.dexlib2.iface.ClassDef
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import org.jf.dexlib2.iface.Method
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import org.jf.dexlib2.iface.instruction.Instruction
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import org.jf.dexlib2.iface.instruction.ReferenceInstruction
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import org.jf.dexlib2.iface.reference.StringReference
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/**
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* Represents the [MethodFingerprint] for a method.
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@ -31,10 +37,184 @@ abstract class MethodFingerprint(
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* The result of the [MethodFingerprint] the [Method].
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*/
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var result: MethodFingerprintResult? = null
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companion object {
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/**
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* Resolve a list of [MethodFingerprint] against a list of [ClassDef].
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* @param context The classes on which to resolve the [MethodFingerprint].
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* @param forData The [BytecodeData] to host proxies.
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* @return True if the resolution was successful, false otherwise.
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*/
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fun Iterable<MethodFingerprint>.resolve(forData: BytecodeData, context: Iterable<ClassDef>) {
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for (fingerprint in this) // For each fingerprint
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classes@ for (classDef in context) // search through all classes for the fingerprint
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if (fingerprint.resolve(forData, classDef))
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break@classes // if the resolution succeeded, continue with the next fingerprint
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}
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/**
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* Resolve a [MethodFingerprint] against a [ClassDef].
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* @param context The class on which to resolve the [MethodFingerprint].
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* @param forData The [BytecodeData] to host proxies.
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* @return True if the resolution was successful, false otherwise.
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*/
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fun MethodFingerprint.resolve(forData: BytecodeData, context: ClassDef): Boolean {
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for (method in context.methods)
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if (this.resolve(forData, method, context))
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return true
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return false
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}
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/**
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* Resolve a [MethodFingerprint] against a [Method].
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* @param context The context on which to resolve the [MethodFingerprint].
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* @param classDef The class of the matching [Method].
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* @param forData The [BytecodeData] to host proxies.
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* @return True if the resolution was successful or if the fingerprint is already resolved, false otherwise.
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*/
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fun MethodFingerprint.resolve(forData: BytecodeData, context: Method, classDef: ClassDef): Boolean {
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val methodFingerprint = this
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if (methodFingerprint.result != null) return true
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if (methodFingerprint.returnType != null && !context.returnType.startsWith(methodFingerprint.returnType))
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return false
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if (methodFingerprint.access != null && methodFingerprint.access != context.accessFlags)
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return false
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if (methodFingerprint.parameters != null && !parametersEqual(
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methodFingerprint.parameters, // TODO: parseParameters()
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context.parameterTypes
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)
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) return false
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@Suppress("UNNECESSARY_NOT_NULL_ASSERTION")
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if (methodFingerprint.customFingerprint != null && !methodFingerprint.customFingerprint!!(context))
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return false
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val stringsScanResult: StringsScanResult? =
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if (methodFingerprint.strings != null) {
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StringsScanResult(
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buildList {
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val implementation = context.implementation ?: return false
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val stringsList = methodFingerprint.strings.toMutableList()
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implementation.instructions.forEach { instruction ->
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if (instruction.opcode.ordinal != Opcode.CONST_STRING.ordinal) return@forEach
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val string = ((instruction as ReferenceInstruction).reference as StringReference).string
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val index = stringsList.indexOfFirst { it == string }
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if (index == -1) return@forEach
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add(
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StringMatch(
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string,
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index
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)
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)
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stringsList.removeAt(index)
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}
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if (stringsList.isNotEmpty()) return false
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}
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)
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} else null
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val patternScanResult = if (methodFingerprint.opcodes != null) {
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context.implementation?.instructions ?: return false
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context.patternScan(methodFingerprint) ?: return false
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} else null
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methodFingerprint.result = MethodFingerprintResult(
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context,
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classDef,
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MethodFingerprintResult.MethodFingerprintScanResult(
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patternScanResult,
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stringsScanResult
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),
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forData
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)
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return true
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}
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private fun Method.patternScan(
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fingerprint: MethodFingerprint
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): MethodFingerprintResult.MethodFingerprintScanResult.PatternScanResult? {
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val instructions = this.implementation!!.instructions
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val fingerprintFuzzyPatternScanThreshold = fingerprint.fuzzyScanThreshold
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val pattern = fingerprint.opcodes!!
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val instructionLength = instructions.count()
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val patternLength = pattern.count()
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for (index in 0 until instructionLength) {
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var patternIndex = 0
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var threshold = fingerprintFuzzyPatternScanThreshold
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while (index + patternIndex < instructionLength) {
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val originalOpcode = instructions.elementAt(index + patternIndex).opcode
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val patternOpcode = pattern.elementAt(patternIndex)
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if (patternOpcode != null && patternOpcode.ordinal != originalOpcode.ordinal) {
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// reaching maximum threshold (0) means,
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// the pattern does not match to the current instructions
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if (threshold-- == 0) break
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}
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if (patternIndex < patternLength - 1) {
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// if the entire pattern has not been scanned yet
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// continue the scan
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patternIndex++
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continue
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}
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// the pattern is valid, generate warnings if fuzzyPatternScanMethod is FuzzyPatternScanMethod
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val result =
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MethodFingerprintResult.MethodFingerprintScanResult.PatternScanResult(
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index,
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index + patternIndex
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)
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if (fingerprint.fuzzyPatternScanMethod !is FuzzyPatternScanMethod) return result
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result.warnings = result.createWarnings(pattern, instructions)
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return result
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}
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}
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return null
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}
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private fun MethodFingerprintResult.MethodFingerprintScanResult.PatternScanResult.createWarnings(
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pattern: Iterable<Opcode?>, instructions: Iterable<Instruction>
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) = buildList {
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for ((patternIndex, instructionIndex) in (this@createWarnings.startIndex until this@createWarnings.endIndex).withIndex()) {
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val originalOpcode = instructions.elementAt(instructionIndex).opcode
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val patternOpcode = pattern.elementAt(patternIndex)
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if (patternOpcode == null || patternOpcode.ordinal == originalOpcode.ordinal) continue
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this.add(
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MethodFingerprintResult.MethodFingerprintScanResult.PatternScanResult.Warning(
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originalOpcode,
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patternOpcode,
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instructionIndex,
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patternIndex
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)
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)
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}
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}
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}
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}
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private typealias StringMatch = MethodFingerprintResult.MethodFingerprintScanResult.StringsScanResult.StringMatch
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private typealias StringsScanResult = MethodFingerprintResult.MethodFingerprintScanResult.StringsScanResult
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/**
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* Represents the result of a [MethodFingerprintUtils].
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* Represents the result of a [MethodFingerprintResult].
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* @param method The matching method.
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* @param classDef The [ClassDef] that contains the matching [method].
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* @param scanResult The result of scanning for the [MethodFingerprint].
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@ -1,189 +0,0 @@
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package app.revanced.patcher.fingerprint.method.utils
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import app.revanced.patcher.data.impl.BytecodeData
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import app.revanced.patcher.extensions.MethodFingerprintExtensions.fuzzyPatternScanMethod
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import app.revanced.patcher.extensions.MethodFingerprintExtensions.fuzzyScanThreshold
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import app.revanced.patcher.extensions.parametersEqual
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import app.revanced.patcher.fingerprint.method.annotation.FuzzyPatternScanMethod
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import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
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import app.revanced.patcher.fingerprint.method.impl.MethodFingerprintResult
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import org.jf.dexlib2.Opcode
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import org.jf.dexlib2.iface.ClassDef
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import org.jf.dexlib2.iface.Method
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import org.jf.dexlib2.iface.instruction.Instruction
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import org.jf.dexlib2.iface.instruction.ReferenceInstruction
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import org.jf.dexlib2.iface.reference.StringReference
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/**
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* Utility class for [MethodFingerprint]
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*/
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object MethodFingerprintUtils {
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/**
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* Resolve a list of [MethodFingerprint] against a list of [ClassDef].
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* @param context The classes on which to resolve the [MethodFingerprint].
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* @param forData The [BytecodeData] to host proxies.
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* @return True if the resolution was successful, false otherwise.
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*/
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fun Iterable<MethodFingerprint>.resolve(forData: BytecodeData, context: Iterable<ClassDef>) {
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for (fingerprint in this) // For each fingerprint
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classes@ for (classDef in context) // search through all classes for the fingerprint
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if (fingerprint.resolve(forData, classDef))
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break@classes // if the resolution succeeded, continue with the next fingerprint
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}
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/**
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* Resolve a [MethodFingerprint] against a [ClassDef].
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* @param context The class on which to resolve the [MethodFingerprint].
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* @param forData The [BytecodeData] to host proxies.
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* @return True if the resolution was successful, false otherwise.
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*/
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fun MethodFingerprint.resolve(forData: BytecodeData, context: ClassDef): Boolean {
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for (method in context.methods)
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if (this.resolve(forData, method, context))
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return true
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return false
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}
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/**
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* Resolve a [MethodFingerprint] against a [Method].
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* @param context The context on which to resolve the [MethodFingerprint].
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* @param classDef The class of the matching [Method].
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* @param forData The [BytecodeData] to host proxies.
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* @return True if the resolution was successful or if the fingerprint is already resolved, false otherwise.
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*/
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fun MethodFingerprint.resolve(forData: BytecodeData, context: Method, classDef: ClassDef): Boolean {
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val methodFingerprint = this
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if (methodFingerprint.result != null) return true
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if (methodFingerprint.returnType != null && !context.returnType.startsWith(methodFingerprint.returnType))
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return false
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if (methodFingerprint.access != null && methodFingerprint.access != context.accessFlags)
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return false
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if (methodFingerprint.parameters != null && !parametersEqual(
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methodFingerprint.parameters, // TODO: parseParameters()
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context.parameterTypes
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)
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) return false
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@Suppress("UNNECESSARY_NOT_NULL_ASSERTION")
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if (methodFingerprint.customFingerprint != null && !methodFingerprint.customFingerprint!!(context))
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return false
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val stringsScanResult: StringsScanResult? =
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if (methodFingerprint.strings != null) {
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StringsScanResult(buildList {
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val implementation = context.implementation ?: return false
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val stringsList = methodFingerprint.strings.toMutableList()
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implementation.instructions.forEach { instruction ->
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if (instruction.opcode.ordinal != Opcode.CONST_STRING.ordinal) return@forEach
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val string = ((instruction as ReferenceInstruction).reference as StringReference).string
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val index = stringsList.indexOfFirst { it == string }
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if (index == -1) return@forEach
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add(
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StringMatch(
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string,
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index
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)
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)
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stringsList.removeAt(index)
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}
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if (stringsList.isNotEmpty()) return false
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})
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} else null
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val patternScanResult = if (methodFingerprint.opcodes != null) {
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context.implementation?.instructions ?: return false
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context.patternScan(methodFingerprint) ?: return false
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} else null
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methodFingerprint.result = MethodFingerprintResult(
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context,
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classDef,
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MethodFingerprintResult.MethodFingerprintScanResult(
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patternScanResult,
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stringsScanResult
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),
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forData
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)
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return true
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}
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private fun Method.patternScan(
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fingerprint: MethodFingerprint
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): MethodFingerprintResult.MethodFingerprintScanResult.PatternScanResult? {
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val instructions = this.implementation!!.instructions
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val fingerprintFuzzyPatternScanThreshold = fingerprint.fuzzyScanThreshold
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val pattern = fingerprint.opcodes!!
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val instructionLength = instructions.count()
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val patternLength = pattern.count()
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for (index in 0 until instructionLength) {
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var patternIndex = 0
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var threshold = fingerprintFuzzyPatternScanThreshold
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while (index + patternIndex < instructionLength) {
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val originalOpcode = instructions.elementAt(index + patternIndex).opcode
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val patternOpcode = pattern.elementAt(patternIndex)
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if (patternOpcode != null && patternOpcode.ordinal != originalOpcode.ordinal) {
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// reaching maximum threshold (0) means,
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// the pattern does not match to the current instructions
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if (threshold-- == 0) break
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}
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if (patternIndex < patternLength - 1) {
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// if the entire pattern has not been scanned yet
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// continue the scan
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patternIndex++
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continue
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}
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// the pattern is valid, generate warnings if fuzzyPatternScanMethod is FuzzyPatternScanMethod
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val result =
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MethodFingerprintResult.MethodFingerprintScanResult.PatternScanResult(index, index + patternIndex)
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if (fingerprint.fuzzyPatternScanMethod !is FuzzyPatternScanMethod) return result
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result.warnings = result.createWarnings(pattern, instructions)
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return result
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}
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}
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return null
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}
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}
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private typealias StringsScanResult = MethodFingerprintResult.MethodFingerprintScanResult.StringsScanResult
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private typealias StringMatch = MethodFingerprintResult.MethodFingerprintScanResult.StringsScanResult.StringMatch
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private fun MethodFingerprintResult.MethodFingerprintScanResult.PatternScanResult.createWarnings(
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pattern: Iterable<Opcode?>, instructions: Iterable<Instruction>
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) = buildList {
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for ((patternIndex, instructionIndex) in (this@createWarnings.startIndex until this@createWarnings.endIndex).withIndex()) {
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val originalOpcode = instructions.elementAt(instructionIndex).opcode
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val patternOpcode = pattern.elementAt(patternIndex)
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if (patternOpcode == null || patternOpcode.ordinal == originalOpcode.ordinal) continue
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this.add(
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MethodFingerprintResult.MethodFingerprintScanResult.PatternScanResult.Warning(
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originalOpcode,
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patternOpcode,
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instructionIndex,
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patternIndex
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)
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)
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}
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}
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private operator fun ClassDef.component1() = this
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private operator fun ClassDef.component2() = this.methods
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