a.smali

.class public final Lcom/lambdaworks/crypto/a;
.super Ljava/lang/Object;
.source "PBKDF.java"


# direct methods
.method public static a(Ljavax/crypto/Mac;[B[BI)V
    .registers 15

    .prologue
    const/4 v10, 0x0

    .line 50
    invoke-virtual {p0}, Ljavax/crypto/Mac;->getMacLength()I

    move-result v2

    .line 52
    int-to-double v0, p3

    const-wide/high16 v4, 0x4000000000000000L    # 2.0

    const-wide/high16 v6, 0x4040000000000000L    # 32.0

    invoke-static {v4, v5, v6, v7}, Ljava/lang/Math;->pow(DD)D

    move-result-wide v4

    const-wide/high16 v6, 0x3ff0000000000000L    # 1.0

    sub-double/2addr v4, v6

    int-to-double v6, v2

    mul-double/2addr v4, v6

    cmpl-double v0, v0, v4

    if-lez v0, :cond_1f

    .line 53
    new-instance v0, Ljava/security/GeneralSecurityException;

    const-string v1, "Requested key length too long"

    invoke-direct {v0, v1}, Ljava/security/GeneralSecurityException;-><init>(Ljava/lang/String;)V

    throw v0

    .line 56
    :cond_1f
    new-array v4, v2, [B

    .line 57
    new-array v5, v2, [B

    .line 58
    array-length v0, p1

    add-int/lit8 v0, v0, 0x4

    new-array v6, v0, [B

    .line 60
    int-to-double v0, p3

    int-to-double v8, v2

    div-double/2addr v0, v8

    invoke-static {v0, v1}, Ljava/lang/Math;->ceil(D)D

    move-result-wide v0

    double-to-int v7, v0

    .line 61
    add-int/lit8 v0, v7, -0x1

    mul-int/2addr v0, v2

    sub-int v1, p3, v0

    .line 63
    array-length v0, p1

    invoke-static {p1, v10, v6, v10, v0}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 65
    const/4 v0, 0x1

    move v3, v0

    :goto_3b
    if-gt v3, v7, :cond_71

    .line 66
    array-length v0, p1

    shr-int/lit8 v8, v3, 0x18

    aput-byte v8, v6, v0

    .line 67
    array-length v0, p1

    add-int/lit8 v0, v0, 0x1

    shr-int/lit8 v8, v3, 0x10

    int-to-byte v8, v8

    aput-byte v8, v6, v0

    .line 68
    array-length v0, p1

    add-int/lit8 v0, v0, 0x2

    shr-int/lit8 v8, v3, 0x8

    int-to-byte v8, v8

    aput-byte v8, v6, v0

    .line 69
    array-length v0, p1

    add-int/lit8 v0, v0, 0x3

    int-to-byte v8, v3

    aput-byte v8, v6, v0

    .line 71
    invoke-virtual {p0, v6}, Ljavax/crypto/Mac;->update([B)V

    .line 72
    invoke-virtual {p0, v4, v10}, Ljavax/crypto/Mac;->doFinal([BI)V

    .line 73
    invoke-static {v4, v10, v5, v10, v2}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 84
    add-int/lit8 v0, v3, -0x1

    mul-int v8, v0, v2

    if-ne v3, v7, :cond_6f

    move v0, v1

    :goto_68
    invoke-static {v5, v10, p2, v8, v0}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 65
    add-int/lit8 v0, v3, 0x1

    move v3, v0

    goto :goto_3b

    :cond_6f
    move v0, v2

    .line 84
    goto :goto_68

    .line 86
    :cond_71
    return-void
.end method