AesCipherUtil.smali

.class public Lnet/lingala/zip4j/crypto/AesCipherUtil;
.super Ljava/lang/Object;


# static fields
.field private static final START_INDEX:I


# direct methods
.method public constructor <init>()V
    .registers 1

    .line 1
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    return-void
.end method

.method public static derivePasswordBasedKey([B[CLnet/lingala/zip4j/model/enums/AesKeyStrength;Z)[B
    .registers 8
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Lnet/lingala/zip4j/exception/ZipException;
        }
    .end annotation

    .line 1
    new-instance v0, Lnet/lingala/zip4j/crypto/PBKDF2/PBKDF2Parameters;

    const-string v1, "HmacSHA1"

    const-string v2, "ISO-8859-1"

    const/16 v3, 0x3e8

    invoke-direct {v0, v1, v2, p0, v3}, Lnet/lingala/zip4j/crypto/PBKDF2/PBKDF2Parameters;-><init>(Ljava/lang/String;Ljava/lang/String;[BI)V

    .line 2
    new-instance p0, Lnet/lingala/zip4j/crypto/PBKDF2/PBKDF2Engine;

    invoke-direct {p0, v0}, Lnet/lingala/zip4j/crypto/PBKDF2/PBKDF2Engine;-><init>(Lnet/lingala/zip4j/crypto/PBKDF2/PBKDF2Parameters;)V

    .line 4
    invoke-virtual {p2}, Lnet/lingala/zip4j/model/enums/AesKeyStrength;->getKeyLength()I

    move-result v0

    .line 5
    invoke-virtual {p2}, Lnet/lingala/zip4j/model/enums/AesKeyStrength;->getMacLength()I

    move-result p2

    add-int v1, v0, p2

    const/4 v2, 0x2

    add-int/2addr v1, v2

    .line 7
    invoke-virtual {p0, p1, v1, p3}, Lnet/lingala/zip4j/crypto/PBKDF2/PBKDF2Engine;->deriveKey([CIZ)[B

    move-result-object p0

    if-eqz p0, :cond_26

    .line 8
    array-length p1, p0

    if-ne p1, v1, :cond_26

    return-object p0

    :cond_26
    new-array p0, v2, [Ljava/lang/Object;

    .line 11
    invoke-static {v0}, Ljava/lang/Integer;->valueOf(I)Ljava/lang/Integer;

    move-result-object p1

    const/4 p3, 0x0

    aput-object p1, p0, p3

    invoke-static {p2}, Ljava/lang/Integer;->valueOf(I)Ljava/lang/Integer;

    move-result-object p1

    const/4 p2, 0x1

    aput-object p1, p0, p2

    const-string p1, "Derived Key invalid for Key Length [%d] MAC Length [%d]"

    invoke-static {p1, p0}, Ljava/lang/String;->format(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;

    move-result-object p0

    .line 12
    new-instance p1, Lnet/lingala/zip4j/exception/ZipException;

    invoke-direct {p1, p0}, Lnet/lingala/zip4j/exception/ZipException;-><init>(Ljava/lang/String;)V

    throw p1
.end method

.method public static derivePasswordVerifier([BLnet/lingala/zip4j/model/enums/AesKeyStrength;)[B
    .registers 5

    const/4 v0, 0x2

    new-array v1, v0, [B

    .line 2
    invoke-virtual {p1}, Lnet/lingala/zip4j/model/enums/AesKeyStrength;->getKeyLength()I

    move-result v2

    invoke-virtual {p1}, Lnet/lingala/zip4j/model/enums/AesKeyStrength;->getMacLength()I

    move-result p1

    add-int/2addr v2, p1

    const/4 p1, 0x0

    .line 3
    invoke-static {p0, v2, v1, p1, v0}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    return-object v1
.end method

.method public static getAESEngine([BLnet/lingala/zip4j/model/enums/AesKeyStrength;)Lnet/lingala/zip4j/crypto/engine/AESEngine;
    .registers 4
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Lnet/lingala/zip4j/exception/ZipException;
        }
    .end annotation

    .line 1
    invoke-virtual {p1}, Lnet/lingala/zip4j/model/enums/AesKeyStrength;->getKeyLength()I

    move-result p1

    .line 2
    new-array v0, p1, [B

    const/4 v1, 0x0

    .line 3
    invoke-static {p0, v1, v0, v1, p1}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 4
    new-instance p0, Lnet/lingala/zip4j/crypto/engine/AESEngine;

    invoke-direct {p0, v0}, Lnet/lingala/zip4j/crypto/engine/AESEngine;-><init>([B)V

    return-object p0
.end method

.method public static getMacBasedPRF([BLnet/lingala/zip4j/model/enums/AesKeyStrength;)Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;
    .registers 5

    .line 1
    invoke-virtual {p1}, Lnet/lingala/zip4j/model/enums/AesKeyStrength;->getMacLength()I

    move-result v0

    .line 2
    new-array v1, v0, [B

    .line 3
    invoke-virtual {p1}, Lnet/lingala/zip4j/model/enums/AesKeyStrength;->getKeyLength()I

    move-result p1

    const/4 v2, 0x0

    invoke-static {p0, p1, v1, v2, v0}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 4
    new-instance p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;

    const-string p1, "HmacSHA1"

    invoke-direct {p0, p1}, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;-><init>(Ljava/lang/String;)V

    .line 5
    invoke-virtual {p0, v1}, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->init([B)V

    return-object p0
.end method

.method public static prepareBuffAESIVBytes([BI)V
    .registers 5

    int-to-byte v0, p1

    const/4 v1, 0x0

    .line 1
    aput-byte v0, p0, v1

    shr-int/lit8 v0, p1, 0x8

    int-to-byte v0, v0

    const/4 v2, 0x1

    .line 2
    aput-byte v0, p0, v2

    shr-int/lit8 v0, p1, 0x10

    int-to-byte v0, v0

    const/4 v2, 0x2

    .line 3
    aput-byte v0, p0, v2

    shr-int/lit8 p1, p1, 0x18

    int-to-byte p1, p1

    const/4 v0, 0x3

    .line 4
    aput-byte p1, p0, v0

    const/4 p1, 0x4

    :goto_17
    const/16 v0, 0xf

    if-gt p1, v0, :cond_20

    .line 7
    aput-byte v1, p0, p1

    add-int/lit8 p1, p1, 0x1

    goto :goto_17

    :cond_20
    return-void
.end method