Primer paso de la investigacion. Se aportan el .apk, las carpetas con el apk extraido y el apk descompilado. El archivo API_DOCUMENTATION.md es un archivo donde se anotaran los descubrimientos del funcionamiento de la API, y los .py son scripts para probar la funcionalidad de la API con los métodos que vayamos encontrando. Finalmente, los archivos .js son scripts de Frida para extraer informacion de la APP durante la ejecucion.
This commit is contained in:
186
apk_decompiled/sources/kotlin/io/encoding/DecodeInputStream.java
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186
apk_decompiled/sources/kotlin/io/encoding/DecodeInputStream.java
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package kotlin.io.encoding;
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import com.google.firebase.analytics.FirebaseAnalytics;
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import java.io.IOException;
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import java.io.InputStream;
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import kotlin.Metadata;
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import kotlin.UByte;
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import kotlin.collections.ArraysKt;
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import kotlin.jvm.internal.Intrinsics;
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@ExperimentalEncodingApi
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@Metadata(d1 = {"\u00002\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0002\b\u0002\n\u0002\u0018\u0002\n\u0002\b\u0002\n\u0002\u0010\u0012\n\u0000\n\u0002\u0010\b\n\u0002\b\u0005\n\u0002\u0010\u000b\n\u0002\b\u0004\n\u0002\u0010\u0002\n\u0002\b\u000f\b\u0003\u0018\u00002\u00020\u0001B\u0015\u0012\u0006\u0010\u0002\u001a\u00020\u0001\u0012\u0006\u0010\u0003\u001a\u00020\u0004¢\u0006\u0002\u0010\u0005J\b\u0010\u0013\u001a\u00020\u0014H\u0016J \u0010\u0015\u001a\u00020\u00142\u0006\u0010\u0016\u001a\u00020\u00072\u0006\u0010\u0017\u001a\u00020\t2\u0006\u0010\u0018\u001a\u00020\tH\u0002J(\u0010\u0019\u001a\u00020\t2\u0006\u0010\u0016\u001a\u00020\u00072\u0006\u0010\u0017\u001a\u00020\t2\u0006\u0010\u001a\u001a\u00020\t2\u0006\u0010\u001b\u001a\u00020\tH\u0002J\u0010\u0010\u001c\u001a\u00020\t2\u0006\u0010\u001b\u001a\u00020\tH\u0002J\b\u0010\u001d\u001a\u00020\tH\u0016J \u0010\u001d\u001a\u00020\t2\u0006\u0010\u001e\u001a\u00020\u00072\u0006\u0010\u001f\u001a\u00020\t2\u0006\u0010\u0018\u001a\u00020\tH\u0016J\b\u0010 \u001a\u00020\tH\u0002J\b\u0010!\u001a\u00020\u0014H\u0002J\b\u0010\"\u001a\u00020\u0014H\u0002R\u000e\u0010\u0003\u001a\u00020\u0004X\u0082\u0004¢\u0006\u0002\n\u0000R\u000e\u0010\u0006\u001a\u00020\u0007X\u0082\u0004¢\u0006\u0002\n\u0000R\u000e\u0010\b\u001a\u00020\tX\u0082\u000e¢\u0006\u0002\n\u0000R\u0014\u0010\n\u001a\u00020\t8BX\u0082\u0004¢\u0006\u0006\u001a\u0004\b\u000b\u0010\fR\u000e\u0010\r\u001a\u00020\tX\u0082\u000e¢\u0006\u0002\n\u0000R\u000e\u0010\u0002\u001a\u00020\u0001X\u0082\u0004¢\u0006\u0002\n\u0000R\u000e\u0010\u000e\u001a\u00020\u000fX\u0082\u000e¢\u0006\u0002\n\u0000R\u000e\u0010\u0010\u001a\u00020\u000fX\u0082\u000e¢\u0006\u0002\n\u0000R\u000e\u0010\u0011\u001a\u00020\u0007X\u0082\u0004¢\u0006\u0002\n\u0000R\u000e\u0010\u0012\u001a\u00020\u0007X\u0082\u0004¢\u0006\u0002\n\u0000¨\u0006#"}, d2 = {"Lkotlin/io/encoding/DecodeInputStream;", "Ljava/io/InputStream;", "input", "base64", "Lkotlin/io/encoding/Base64;", "(Ljava/io/InputStream;Lkotlin/io/encoding/Base64;)V", "byteBuffer", "", "byteBufferEndIndex", "", "byteBufferLength", "getByteBufferLength", "()I", "byteBufferStartIndex", "isClosed", "", "isEOF", "singleByteBuffer", "symbolBuffer", "close", "", "copyByteBufferInto", "dst", "dstOffset", "length", "decodeSymbolBufferInto", "dstEndIndex", "symbolBufferLength", "handlePaddingSymbol", "read", FirebaseAnalytics.Param.DESTINATION, "offset", "readNextSymbol", "resetByteBufferIfEmpty", "shiftByteBufferToStartIfNeeded", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
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/* loaded from: classes3.dex */
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final class DecodeInputStream extends InputStream {
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private final Base64 base64;
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private final byte[] byteBuffer;
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private int byteBufferEndIndex;
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private int byteBufferStartIndex;
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private final InputStream input;
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private boolean isClosed;
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private boolean isEOF;
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private final byte[] singleByteBuffer;
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private final byte[] symbolBuffer;
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public DecodeInputStream(InputStream input, Base64 base64) {
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Intrinsics.checkNotNullParameter(input, "input");
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Intrinsics.checkNotNullParameter(base64, "base64");
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this.input = input;
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this.base64 = base64;
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this.singleByteBuffer = new byte[1];
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this.symbolBuffer = new byte[1024];
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this.byteBuffer = new byte[1024];
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}
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private final void copyByteBufferInto(byte[] dst, int dstOffset, int length) {
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byte[] bArr = this.byteBuffer;
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int i = this.byteBufferStartIndex;
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ArraysKt.copyInto(bArr, dst, dstOffset, i, i + length);
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this.byteBufferStartIndex += length;
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resetByteBufferIfEmpty();
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}
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private final int decodeSymbolBufferInto(byte[] dst, int dstOffset, int dstEndIndex, int symbolBufferLength) {
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int i = this.byteBufferEndIndex;
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this.byteBufferEndIndex = i + this.base64.decodeIntoByteArray(this.symbolBuffer, this.byteBuffer, i, 0, symbolBufferLength);
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int min = Math.min(getByteBufferLength(), dstEndIndex - dstOffset);
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copyByteBufferInto(dst, dstOffset, min);
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shiftByteBufferToStartIfNeeded();
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return min;
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}
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private final int getByteBufferLength() {
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return this.byteBufferEndIndex - this.byteBufferStartIndex;
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}
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private final int handlePaddingSymbol(int symbolBufferLength) {
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this.symbolBuffer[symbolBufferLength] = Base64.padSymbol;
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if ((symbolBufferLength & 3) != 2) {
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return symbolBufferLength + 1;
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}
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int readNextSymbol = readNextSymbol();
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if (readNextSymbol >= 0) {
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this.symbolBuffer[symbolBufferLength + 1] = (byte) readNextSymbol;
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}
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return symbolBufferLength + 2;
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}
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private final int readNextSymbol() {
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int read;
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if (!this.base64.getIsMimeScheme()) {
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return this.input.read();
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}
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do {
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read = this.input.read();
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if (read == -1) {
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break;
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}
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} while (!Base64Kt.isInMimeAlphabet(read));
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return read;
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}
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private final void resetByteBufferIfEmpty() {
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if (this.byteBufferStartIndex == this.byteBufferEndIndex) {
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this.byteBufferStartIndex = 0;
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this.byteBufferEndIndex = 0;
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}
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}
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private final void shiftByteBufferToStartIfNeeded() {
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byte[] bArr = this.byteBuffer;
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int length = bArr.length;
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int i = this.byteBufferEndIndex;
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if ((this.symbolBuffer.length / 4) * 3 > length - i) {
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ArraysKt.copyInto(bArr, bArr, 0, this.byteBufferStartIndex, i);
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this.byteBufferEndIndex -= this.byteBufferStartIndex;
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this.byteBufferStartIndex = 0;
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}
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}
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@Override // java.io.InputStream, java.io.Closeable, java.lang.AutoCloseable
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public void close() {
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if (this.isClosed) {
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return;
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}
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this.isClosed = true;
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this.input.close();
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}
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@Override // java.io.InputStream
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public int read() {
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int i = this.byteBufferStartIndex;
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if (i < this.byteBufferEndIndex) {
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int i4 = this.byteBuffer[i] & UByte.MAX_VALUE;
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this.byteBufferStartIndex = i + 1;
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resetByteBufferIfEmpty();
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return i4;
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}
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int read = read(this.singleByteBuffer, 0, 1);
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if (read == -1) {
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return -1;
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}
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if (read == 1) {
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return this.singleByteBuffer[0] & UByte.MAX_VALUE;
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}
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throw new IllegalStateException("Unreachable");
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}
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@Override // java.io.InputStream
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public int read(byte[] destination, int offset, int length) {
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int i;
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boolean z3;
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boolean z4;
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Intrinsics.checkNotNullParameter(destination, "destination");
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if (offset >= 0 && length >= 0 && (i = offset + length) <= destination.length) {
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if (!this.isClosed) {
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if (this.isEOF) {
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return -1;
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}
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if (length == 0) {
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return 0;
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}
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if (getByteBufferLength() >= length) {
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copyByteBufferInto(destination, offset, length);
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return length;
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}
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int byteBufferLength = (((length - getByteBufferLength()) + 2) / 3) * 4;
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int i4 = offset;
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while (true) {
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z3 = this.isEOF;
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if (z3 || byteBufferLength <= 0) {
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break;
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}
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int min = Math.min(this.symbolBuffer.length, byteBufferLength);
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int i5 = 0;
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while (true) {
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z4 = this.isEOF;
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if (z4 || i5 >= min) {
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break;
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}
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int readNextSymbol = readNextSymbol();
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if (readNextSymbol == -1) {
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this.isEOF = true;
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} else if (readNextSymbol != 61) {
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this.symbolBuffer[i5] = (byte) readNextSymbol;
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i5++;
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} else {
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i5 = handlePaddingSymbol(i5);
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this.isEOF = true;
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}
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}
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if (!z4 && i5 != min) {
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throw new IllegalStateException("Check failed.");
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}
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byteBufferLength -= i5;
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i4 += decodeSymbolBufferInto(destination, i4, i, i5);
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}
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if (i4 == offset && z3) {
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return -1;
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}
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return i4 - offset;
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}
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throw new IOException("The input stream is closed.");
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}
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throw new IndexOutOfBoundsException("offset: " + offset + ", length: " + length + ", buffer size: " + destination.length);
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}
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}
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