MacBasedPRF.smali

.class public Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;
.super Ljava/lang/Object;

# interfaces
.implements Lnet/lingala/zip4j/crypto/PBKDF2/PRF;


# instance fields
.field private hLen:I

.field private mac:Ljavax/crypto/Mac;

.field private macAlgorithm:Ljava/lang/String;

.field private macCache:Ljava/io/ByteArrayOutputStream;


# direct methods
.method public constructor <init>(Ljava/lang/String;)V
    .registers 4

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

    .line 2
    iput-object p1, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->macAlgorithm:Ljava/lang/String;

    .line 3
    new-instance v0, Ljava/io/ByteArrayOutputStream;

    const/16 v1, 0x1000

    invoke-direct {v0, v1}, Ljava/io/ByteArrayOutputStream;-><init>(I)V

    iput-object v0, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->macCache:Ljava/io/ByteArrayOutputStream;

    .line 5
    :try_start_e
    invoke-static {p1}, Ljavax/crypto/Mac;->getInstance(Ljava/lang/String;)Ljavax/crypto/Mac;

    move-result-object p1

    iput-object p1, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->mac:Ljavax/crypto/Mac;

    .line 6
    invoke-virtual {p1}, Ljavax/crypto/Mac;->getMacLength()I

    move-result p1

    iput p1, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->hLen:I
    :try_end_1a
    .catch Ljava/security/NoSuchAlgorithmException; {:try_start_e .. :try_end_1a} :catch_1b

    return-void

    :catch_1b
    move-exception p1

    .line 8
    new-instance v0, Ljava/lang/RuntimeException;

    invoke-direct {v0, p1}, Ljava/lang/RuntimeException;-><init>(Ljava/lang/Throwable;)V

    throw v0
.end method

.method private doMacUpdate(I)V
    .registers 7

    .line 1
    iget-object v0, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->macCache:Ljava/io/ByteArrayOutputStream;

    invoke-virtual {v0}, Ljava/io/ByteArrayOutputStream;->toByteArray()[B

    move-result-object v0

    .line 2
    array-length v1, v0

    sub-int/2addr v1, p1

    const/4 p1, 0x0

    :goto_9
    if-ge p1, v1, :cond_1b

    add-int/lit8 v2, p1, 0x10

    if-gt v2, v1, :cond_12

    const/16 v3, 0x10

    goto :goto_14

    :cond_12
    sub-int v3, v1, p1

    .line 6
    :goto_14
    iget-object v4, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->mac:Ljavax/crypto/Mac;

    invoke-virtual {v4, v0, p1, v3}, Ljavax/crypto/Mac;->update([BII)V

    move p1, v2

    goto :goto_9

    .line 8
    :cond_1b
    iget-object p1, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->macCache:Ljava/io/ByteArrayOutputStream;

    invoke-virtual {p1}, Ljava/io/ByteArrayOutputStream;->reset()V

    return-void
.end method


# virtual methods
.method public doFinal()[B
    .registers 2

    const/4 v0, 0x0

    .line 5
    invoke-virtual {p0, v0}, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->doFinal(I)[B

    move-result-object v0

    return-object v0
.end method

.method public doFinal(I)[B
    .registers 3

    .line 6
    iget-object v0, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->macCache:Ljava/io/ByteArrayOutputStream;

    invoke-virtual {v0}, Ljava/io/ByteArrayOutputStream;->size()I

    move-result v0

    if-lez v0, :cond_b

    .line 7
    invoke-direct {p0, p1}, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->doMacUpdate(I)V

    .line 9
    :cond_b
    iget-object p1, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->mac:Ljavax/crypto/Mac;

    invoke-virtual {p1}, Ljavax/crypto/Mac;->doFinal()[B

    move-result-object p1

    return-object p1
.end method

.method public doFinal([B)[B
    .registers 3

    .line 1
    iget-object v0, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->macCache:Ljava/io/ByteArrayOutputStream;

    invoke-virtual {v0}, Ljava/io/ByteArrayOutputStream;->size()I

    move-result v0

    if-lez v0, :cond_c

    const/4 v0, 0x0

    .line 2
    invoke-direct {p0, v0}, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->doMacUpdate(I)V

    .line 4
    :cond_c
    iget-object v0, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->mac:Ljavax/crypto/Mac;

    invoke-virtual {v0, p1}, Ljavax/crypto/Mac;->doFinal([B)[B

    move-result-object p1

    return-object p1
.end method

.method public getHLen()I
    .registers 2

    .line 1
    iget v0, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->hLen:I

    return v0
.end method

.method public init([B)V
    .registers 5

    .line 1
    :try_start_0
    iget-object v0, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->mac:Ljavax/crypto/Mac;

    new-instance v1, Ljavax/crypto/spec/SecretKeySpec;

    iget-object v2, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->macAlgorithm:Ljava/lang/String;

    invoke-direct {v1, p1, v2}, Ljavax/crypto/spec/SecretKeySpec;-><init>([BLjava/lang/String;)V

    invoke-virtual {v0, v1}, Ljavax/crypto/Mac;->init(Ljava/security/Key;)V
    :try_end_c
    .catch Ljava/security/InvalidKeyException; {:try_start_0 .. :try_end_c} :catch_d

    return-void

    :catch_d
    move-exception p1

    .line 3
    new-instance v0, Ljava/lang/RuntimeException;

    invoke-direct {v0, p1}, Ljava/lang/RuntimeException;-><init>(Ljava/lang/Throwable;)V

    throw v0
.end method

.method public update([B)V
    .registers 4

    .line 1
    array-length v0, p1

    const/4 v1, 0x0

    invoke-virtual {p0, p1, v1, v0}, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->update([BII)V

    return-void
.end method

.method public update([BII)V
    .registers 6

    .line 2
    :try_start_0
    iget-object v0, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->macCache:Ljava/io/ByteArrayOutputStream;

    invoke-virtual {v0}, Ljava/io/ByteArrayOutputStream;->size()I

    move-result v0

    add-int/2addr v0, p3

    const/16 v1, 0x1000

    if-le v0, v1, :cond_f

    const/4 v0, 0x0

    .line 3
    invoke-direct {p0, v0}, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->doMacUpdate(I)V

    .line 5
    :cond_f
    iget-object v0, p0, Lnet/lingala/zip4j/crypto/PBKDF2/MacBasedPRF;->macCache:Ljava/io/ByteArrayOutputStream;

    invoke-virtual {v0, p1, p2, p3}, Ljava/io/ByteArrayOutputStream;->write([BII)V
    :try_end_14
    .catch Ljava/lang/IllegalStateException; {:try_start_0 .. :try_end_14} :catch_15

    return-void

    :catch_15
    move-exception p1

    .line 7
    new-instance p2, Ljava/lang/RuntimeException;

    invoke-direct {p2, p1}, Ljava/lang/RuntimeException;-><init>(Ljava/lang/Throwable;)V

    throw p2
.end method