AESDecrypter.smali
.class public Lnet/lingala/zip4j/crypto/AESDecrypter;
.super Ljava/lang/Object;
# interfaces
.implements Lnet/lingala/zip4j/crypto/Decrypter;
# instance fields
.field private aesEngine:Lnet/lingala/zip4j/crypto/engine/AESEngine;
.field private counterBlock:[B
.field private iv:[B
.field private mac:Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;
.field private nonce:I
# direct methods
.method public constructor <init>(Lnet/lingala/zip4j/model/AESExtraDataRecord;[C[B[BZ)V
.registers 12
.annotation system Ldalvik/annotation/Throws;
value = {
Lnet/lingala/zip4j/exception/ZipException;
}
.end annotation
.line 1
invoke-direct {p0}, Ljava/lang/Object;-><init>()V
const/4 v0, 0x1
.line 2
iput v0, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->nonce:I
const/16 v0, 0x10
new-array v1, v0, [B
.line 8
iput-object v1, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->iv:[B
new-array v0, v0, [B
.line 9
iput-object v0, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->counterBlock:[B
move-object v0, p0
move-object v1, p3
move-object v2, p4
move-object v3, p2
move-object v4, p1
move v5, p5
.line 10
invoke-direct/range {v0 .. v5}, Lnet/lingala/zip4j/crypto/AESDecrypter;->init([B[B[CLnet/lingala/zip4j/model/AESExtraDataRecord;Z)V
return-void
.end method
.method private init([B[B[CLnet/lingala/zip4j/model/AESExtraDataRecord;Z)V
.registers 7
.annotation system Ldalvik/annotation/Throws;
value = {
Lnet/lingala/zip4j/exception/ZipException;
}
.end annotation
if-eqz p3, :cond_2e
.line 1
array-length v0, p3
if-lez v0, :cond_2e
.line 5
invoke-virtual {p4}, Lnet/lingala/zip4j/model/AESExtraDataRecord;->getAesKeyStrength()Lnet/lingala/zip4j/model/enums/AesKeyStrength;
move-result-object p4
.line 6
invoke-static {p1, p3, p4, p5}, Lnet/lingala/zip4j/crypto/AesCipherUtil;->derivePasswordBasedKey([B[CLnet/lingala/zip4j/model/enums/AesKeyStrength;Z)[B
move-result-object p1
.line 7
invoke-static {p1, p4}, Lnet/lingala/zip4j/crypto/AesCipherUtil;->derivePasswordVerifier([BLnet/lingala/zip4j/model/enums/AesKeyStrength;)[B
move-result-object p3
.line 8
invoke-static {p2, p3}, Ljava/util/Arrays;->equals([B[B)Z
move-result p2
if-eqz p2, :cond_24
.line 12
invoke-static {p1, p4}, Lnet/lingala/zip4j/crypto/AesCipherUtil;->getAESEngine([BLnet/lingala/zip4j/model/enums/AesKeyStrength;)Lnet/lingala/zip4j/crypto/engine/AESEngine;
move-result-object p2
iput-object p2, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->aesEngine:Lnet/lingala/zip4j/crypto/engine/AESEngine;
.line 13
invoke-static {p1, p4}, Lnet/lingala/zip4j/crypto/AesCipherUtil;->getMacBasedPRF([BLnet/lingala/zip4j/model/enums/AesKeyStrength;)Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;
move-result-object p1
iput-object p1, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->mac:Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;
return-void
.line 14
:cond_24
new-instance p1, Lnet/lingala/zip4j/exception/ZipException;
sget-object p2, Lnet/lingala/zip4j/exception/ZipException$Type;->WRONG_PASSWORD:Lnet/lingala/zip4j/exception/ZipException$Type;
const-string p3, "Wrong Password"
invoke-direct {p1, p3, p2}, Lnet/lingala/zip4j/exception/ZipException;-><init>(Ljava/lang/String;Lnet/lingala/zip4j/exception/ZipException$Type;)V
throw p1
.line 15
:cond_2e
new-instance p1, Lnet/lingala/zip4j/exception/ZipException;
sget-object p2, Lnet/lingala/zip4j/exception/ZipException$Type;->WRONG_PASSWORD:Lnet/lingala/zip4j/exception/ZipException$Type;
const-string p3, "empty or null password provided for AES decryption"
invoke-direct {p1, p3, p2}, Lnet/lingala/zip4j/exception/ZipException;-><init>(Ljava/lang/String;Lnet/lingala/zip4j/exception/ZipException$Type;)V
throw p1
.end method
# virtual methods
.method public decryptData([BII)I
.registers 11
.annotation system Ldalvik/annotation/Throws;
value = {
Lnet/lingala/zip4j/exception/ZipException;
}
.end annotation
move v0, p2
:goto_1
add-int v1, p2, p3
if-ge v0, v1, :cond_3c
add-int/lit8 v2, v0, 0x10
if-gt v2, v1, :cond_c
const/16 v1, 0x10
goto :goto_d
:cond_c
sub-int/2addr v1, v0
.line 1
:goto_d
iget-object v3, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->mac:Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;
invoke-virtual {v3, p1, v0, v1}, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->update([BII)V
.line 2
iget-object v3, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->iv:[B
iget v4, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->nonce:I
invoke-static {v3, v4}, Lnet/lingala/zip4j/crypto/AesCipherUtil;->prepareBuffAESIVBytes([BI)V
.line 3
iget-object v3, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->aesEngine:Lnet/lingala/zip4j/crypto/engine/AESEngine;
iget-object v4, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->iv:[B
iget-object v5, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->counterBlock:[B
invoke-virtual {v3, v4, v5}, Lnet/lingala/zip4j/crypto/engine/AESEngine;->processBlock([B[B)I
const/4 v3, 0x0
:goto_23
if-ge v3, v1, :cond_34
add-int v4, v0, v3
.line 6
aget-byte v5, p1, v4
iget-object v6, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->counterBlock:[B
aget-byte v6, v6, v3
xor-int/2addr v5, v6
int-to-byte v5, v5
aput-byte v5, p1, v4
add-int/lit8 v3, v3, 0x1
goto :goto_23
.line 9
:cond_34
iget v0, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->nonce:I
add-int/lit8 v0, v0, 0x1
iput v0, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->nonce:I
move v0, v2
goto :goto_1
:cond_3c
return p3
.end method
.method public getCalculatedAuthenticationBytes(I)[B
.registers 3
.line 1
iget-object v0, p0, Lnet/lingala/zip4j/crypto/AESDecrypter;->mac:Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;
invoke-virtual {v0, p1}, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->doFinal(I)[B
move-result-object p1
return-object p1
.end method