RFC3394WrapEngine.smali

.class public Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;
.super Ljava/lang/Object;
.source "RFC3394WrapEngine.java"

# interfaces
.implements Lorg/spongycastle/crypto/Wrapper;


# instance fields
.field private engine:Lorg/spongycastle/crypto/BlockCipher;

.field private forWrapping:Z

.field private iv:[B

.field private param:Lorg/spongycastle/crypto/params/KeyParameter;

.field private wrapCipherMode:Z


# direct methods
.method public constructor <init>(Lorg/spongycastle/crypto/BlockCipher;)V
    .registers 3

    .prologue
    .line 39
    const/4 v0, 0x0

    invoke-direct {p0, p1, v0}, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;-><init>(Lorg/spongycastle/crypto/BlockCipher;Z)V

    .line 40
    return-void
.end method

.method public constructor <init>(Lorg/spongycastle/crypto/BlockCipher;Z)V
    .registers 4

    .prologue
    .line 49
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    .line 28
    const/16 v0, 0x8

    new-array v0, v0, [B

    fill-array-data v0, :array_16

    iput-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    .line 50
    iput-object p1, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->engine:Lorg/spongycastle/crypto/BlockCipher;

    .line 51
    if-eqz p2, :cond_14

    const/4 v0, 0x0

    :goto_11
    iput-boolean v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->wrapCipherMode:Z

    .line 52
    return-void

    .line 51
    :cond_14
    const/4 v0, 0x1

    goto :goto_11

    .line 28
    :array_16
    .array-data 1
        -0x5at
        -0x5at
        -0x5at
        -0x5at
        -0x5at
        -0x5at
        -0x5at
        -0x5at
    .end array-data
.end method


# virtual methods
.method public getAlgorithmName()Ljava/lang/String;
    .registers 2

    .prologue
    .line 82
    iget-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->engine:Lorg/spongycastle/crypto/BlockCipher;

    invoke-interface {v0}, Lorg/spongycastle/crypto/BlockCipher;->getAlgorithmName()Ljava/lang/String;

    move-result-object v0

    return-object v0
.end method

.method public init(ZLorg/spongycastle/crypto/CipherParameters;)V
    .registers 5

    .prologue
    .line 58
    iput-boolean p1, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->forWrapping:Z

    .line 60
    instance-of v0, p2, Lorg/spongycastle/crypto/params/ParametersWithRandom;

    if-eqz v0, :cond_3b

    .line 62
    check-cast p2, Lorg/spongycastle/crypto/params/ParametersWithRandom;

    invoke-virtual {p2}, Lorg/spongycastle/crypto/params/ParametersWithRandom;->getParameters()Lorg/spongycastle/crypto/CipherParameters;

    move-result-object v0

    .line 65
    :goto_c
    instance-of v1, v0, Lorg/spongycastle/crypto/params/KeyParameter;

    if-eqz v1, :cond_15

    .line 67
    check-cast v0, Lorg/spongycastle/crypto/params/KeyParameter;

    iput-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->param:Lorg/spongycastle/crypto/params/KeyParameter;

    .line 78
    :cond_14
    return-void

    .line 69
    :cond_15
    instance-of v1, v0, Lorg/spongycastle/crypto/params/ParametersWithIV;

    if-eqz v1, :cond_14

    move-object v1, v0

    .line 71
    check-cast v1, Lorg/spongycastle/crypto/params/ParametersWithIV;

    invoke-virtual {v1}, Lorg/spongycastle/crypto/params/ParametersWithIV;->getIV()[B

    move-result-object v1

    iput-object v1, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    .line 72
    check-cast v0, Lorg/spongycastle/crypto/params/ParametersWithIV;

    invoke-virtual {v0}, Lorg/spongycastle/crypto/params/ParametersWithIV;->getParameters()Lorg/spongycastle/crypto/CipherParameters;

    move-result-object v0

    check-cast v0, Lorg/spongycastle/crypto/params/KeyParameter;

    iput-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->param:Lorg/spongycastle/crypto/params/KeyParameter;

    .line 73
    iget-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v0, v0

    const/16 v1, 0x8

    if-eq v0, v1, :cond_14

    .line 75
    new-instance v0, Ljava/lang/IllegalArgumentException;

    const-string v1, "IV not equal to 8"

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

    throw v0

    :cond_3b
    move-object v0, p2

    goto :goto_c
.end method

.method public unwrap([BII)[B
    .registers 15

    .prologue
    .line 142
    iget-boolean v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->forWrapping:Z

    if-eqz v0, :cond_c

    .line 144
    new-instance v0, Ljava/lang/IllegalStateException;

    const-string v1, "not set for unwrapping"

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

    throw v0

    .line 147
    :cond_c
    div-int/lit8 v1, p3, 0x8

    .line 149
    shl-int/lit8 v0, v1, 0x3

    if-eq v0, p3, :cond_1a

    .line 151
    new-instance v0, Lorg/spongycastle/crypto/InvalidCipherTextException;

    const-string v1, "unwrap data must be a multiple of 8 bytes"

    invoke-direct {v0, v1}, Lorg/spongycastle/crypto/InvalidCipherTextException;-><init>(Ljava/lang/String;)V

    throw v0

    .line 154
    :cond_1a
    iget-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v0, v0

    sub-int v0, p3, v0

    new-array v5, v0, [B

    .line 155
    iget-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v0, v0

    new-array v6, v0, [B

    .line 156
    iget-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v0, v0

    add-int/lit8 v0, v0, 0x8

    new-array v7, v0, [B

    .line 158
    const/4 v0, 0x0

    iget-object v2, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v2, v2

    invoke-static {p1, p2, v6, v0, v2}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 159
    iget-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v0, v0

    add-int/2addr v0, p2

    const/4 v2, 0x0

    iget-object v3, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v3, v3

    sub-int v3, p3, v3

    invoke-static {p1, v0, v5, v2, v3}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 161
    iget-object v2, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->engine:Lorg/spongycastle/crypto/BlockCipher;

    iget-boolean v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->wrapCipherMode:Z

    if-nez v0, :cond_81

    const/4 v0, 0x1

    :goto_48
    iget-object v3, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->param:Lorg/spongycastle/crypto/params/KeyParameter;

    invoke-interface {v2, v0, v3}, Lorg/spongycastle/crypto/BlockCipher;->init(ZLorg/spongycastle/crypto/CipherParameters;)V

    .line 163
    add-int/lit8 v3, v1, -0x1

    .line 165
    const/4 v0, 0x5

    move v4, v0

    :goto_51
    if-ltz v4, :cond_a4

    move v2, v3

    .line 167
    :goto_54
    if-lez v2, :cond_a0

    .line 169
    const/4 v0, 0x0

    const/4 v1, 0x0

    iget-object v8, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v8, v8

    invoke-static {v6, v0, v7, v1, v8}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 170
    add-int/lit8 v0, v2, -0x1

    mul-int/lit8 v0, v0, 0x8

    iget-object v1, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v1, v1

    const/16 v8, 0x8

    invoke-static {v5, v0, v7, v1, v8}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 172
    mul-int v0, v3, v4

    add-int v1, v0, v2

    .line 173
    const/4 v0, 0x1

    :goto_6f
    if-eqz v1, :cond_83

    .line 175
    int-to-byte v8, v1

    .line 177
    iget-object v9, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v9, v9

    sub-int/2addr v9, v0

    aget-byte v10, v7, v9

    xor-int/2addr v8, v10

    int-to-byte v8, v8

    aput-byte v8, v7, v9

    .line 179
    ushr-int/lit8 v1, v1, 0x8

    .line 173
    add-int/lit8 v0, v0, 0x1

    goto :goto_6f

    .line 161
    :cond_81
    const/4 v0, 0x0

    goto :goto_48

    .line 182
    :cond_83
    iget-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->engine:Lorg/spongycastle/crypto/BlockCipher;

    const/4 v1, 0x0

    const/4 v8, 0x0

    invoke-interface {v0, v7, v1, v7, v8}, Lorg/spongycastle/crypto/BlockCipher;->processBlock([BI[BI)I

    .line 183
    const/4 v0, 0x0

    const/4 v1, 0x0

    const/16 v8, 0x8

    invoke-static {v7, v0, v6, v1, v8}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 184
    const/16 v0, 0x8

    add-int/lit8 v1, v2, -0x1

    mul-int/lit8 v1, v1, 0x8

    const/16 v8, 0x8

    invoke-static {v7, v0, v5, v1, v8}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 167
    add-int/lit8 v0, v2, -0x1

    move v2, v0

    goto :goto_54

    .line 165
    :cond_a0
    add-int/lit8 v0, v4, -0x1

    move v4, v0

    goto :goto_51

    .line 188
    :cond_a4
    iget-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    invoke-static {v6, v0}, Lorg/spongycastle/util/Arrays;->constantTimeAreEqual([B[B)Z

    move-result v0

    if-nez v0, :cond_b4

    .line 190
    new-instance v0, Lorg/spongycastle/crypto/InvalidCipherTextException;

    const-string v1, "checksum failed"

    invoke-direct {v0, v1}, Lorg/spongycastle/crypto/InvalidCipherTextException;-><init>(Ljava/lang/String;)V

    throw v0

    .line 193
    :cond_b4
    return-object v5
.end method

.method public wrap([BII)[B
    .registers 14

    .prologue
    .line 90
    iget-boolean v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->forWrapping:Z

    if-nez v0, :cond_c

    .line 92
    new-instance v0, Ljava/lang/IllegalStateException;

    const-string v1, "not set for wrapping"

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

    throw v0

    .line 95
    :cond_c
    div-int/lit8 v4, p3, 0x8

    .line 97
    shl-int/lit8 v0, v4, 0x3

    if-eq v0, p3, :cond_1a

    .line 99
    new-instance v0, Lorg/spongycastle/crypto/DataLengthException;

    const-string v1, "wrap data must be a multiple of 8 bytes"

    invoke-direct {v0, v1}, Lorg/spongycastle/crypto/DataLengthException;-><init>(Ljava/lang/String;)V

    throw v0

    .line 102
    :cond_1a
    iget-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v0, v0

    add-int/2addr v0, p3

    new-array v5, v0, [B

    .line 103
    iget-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v0, v0

    add-int/lit8 v0, v0, 0x8

    new-array v6, v0, [B

    .line 105
    iget-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    const/4 v1, 0x0

    const/4 v2, 0x0

    iget-object v3, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v3, v3

    invoke-static {v0, v1, v5, v2, v3}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 106
    iget-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v0, v0

    invoke-static {p1, p2, v5, v0, p3}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 108
    iget-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->engine:Lorg/spongycastle/crypto/BlockCipher;

    iget-boolean v1, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->wrapCipherMode:Z

    iget-object v2, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->param:Lorg/spongycastle/crypto/params/KeyParameter;

    invoke-interface {v0, v1, v2}, Lorg/spongycastle/crypto/BlockCipher;->init(ZLorg/spongycastle/crypto/CipherParameters;)V

    .line 110
    const/4 v0, 0x0

    move v3, v0

    :goto_42
    const/4 v0, 0x6

    if-eq v3, v0, :cond_91

    .line 112
    const/4 v0, 0x1

    move v2, v0

    :goto_47
    if-gt v2, v4, :cond_8d

    .line 114
    const/4 v0, 0x0

    const/4 v1, 0x0

    iget-object v7, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v7, v7

    invoke-static {v5, v0, v6, v1, v7}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 115
    shl-int/lit8 v0, v2, 0x3

    iget-object v1, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v1, v1

    const/16 v7, 0x8

    invoke-static {v5, v0, v6, v1, v7}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 116
    iget-object v0, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->engine:Lorg/spongycastle/crypto/BlockCipher;

    const/4 v1, 0x0

    const/4 v7, 0x0

    invoke-interface {v0, v6, v1, v6, v7}, Lorg/spongycastle/crypto/BlockCipher;->processBlock([BI[BI)I

    .line 118
    mul-int v0, v4, v3

    add-int v1, v0, v2

    .line 119
    const/4 v0, 0x1

    :goto_67
    if-eqz v1, :cond_79

    .line 121
    int-to-byte v7, v1

    .line 123
    iget-object v8, p0, Lorg/spongycastle/crypto/engines/RFC3394WrapEngine;->iv:[B

    array-length v8, v8

    sub-int/2addr v8, v0

    aget-byte v9, v6, v8

    xor-int/2addr v7, v9

    int-to-byte v7, v7

    aput-byte v7, v6, v8

    .line 125
    ushr-int/lit8 v1, v1, 0x8

    .line 119
    add-int/lit8 v0, v0, 0x1

    goto :goto_67

    .line 128
    :cond_79
    const/4 v0, 0x0

    const/4 v1, 0x0

    const/16 v7, 0x8

    invoke-static {v6, v0, v5, v1, v7}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 129
    const/16 v0, 0x8

    shl-int/lit8 v1, v2, 0x3

    const/16 v7, 0x8

    invoke-static {v6, v0, v5, v1, v7}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 112
    add-int/lit8 v0, v2, 0x1

    move v2, v0

    goto :goto_47

    .line 110
    :cond_8d
    add-int/lit8 v0, v3, 0x1

    move v3, v0

    goto :goto_42

    .line 133
    :cond_91
    return-object v5
.end method