s.smali

.class public final Lcom/subgraph/orchid/crypto/s;
.super Ljava/lang/Object;
.source "TorTapKeyAgreement.java"

# interfaces
.implements Lcom/subgraph/orchid/crypto/k;


# static fields
.field private static final bGu:Ljava/math/BigInteger;

.field private static final bGv:Ljava/math/BigInteger;

.field private static final bGw:Ljavax/crypto/spec/DHParameterSpec;


# instance fields
.field public final bED:Lcom/subgraph/orchid/crypto/o;

.field private final bGx:Ljavax/crypto/KeyAgreement;

.field private final bGy:Ljava/security/KeyPair;


# direct methods
.method static constructor <clinit>()V
    .registers 4

    .prologue
    .line 43
    new-instance v0, Ljava/math/BigInteger;

    const-string v1, "00FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFF"

    const/16 v2, 0x10

    invoke-direct {v0, v1, v2}, Ljava/math/BigInteger;-><init>(Ljava/lang/String;I)V

    sput-object v0, Lcom/subgraph/orchid/crypto/s;->bGu:Ljava/math/BigInteger;

    .line 49
    new-instance v0, Ljava/math/BigInteger;

    const-string v1, "2"

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

    sput-object v0, Lcom/subgraph/orchid/crypto/s;->bGv:Ljava/math/BigInteger;

    .line 58
    new-instance v0, Ljavax/crypto/spec/DHParameterSpec;

    sget-object v1, Lcom/subgraph/orchid/crypto/s;->bGu:Ljava/math/BigInteger;

    sget-object v2, Lcom/subgraph/orchid/crypto/s;->bGv:Ljava/math/BigInteger;

    const/16 v3, 0x140

    invoke-direct {v0, v1, v2, v3}, Ljavax/crypto/spec/DHParameterSpec;-><init>(Ljava/math/BigInteger;Ljava/math/BigInteger;I)V

    sput-object v0, Lcom/subgraph/orchid/crypto/s;->bGw:Ljavax/crypto/spec/DHParameterSpec;

    return-void
.end method

.method public constructor <init>()V
    .registers 2

    .prologue
    .line 77
    const/4 v0, 0x0

    invoke-direct {p0, v0}, Lcom/subgraph/orchid/crypto/s;-><init>(Lcom/subgraph/orchid/crypto/o;)V

    .line 78
    return-void
.end method

.method public constructor <init>(Lcom/subgraph/orchid/crypto/o;)V
    .registers 3

    .prologue
    .line 69
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    .line 70
    invoke-static {}, Lcom/subgraph/orchid/crypto/s;->generateKeyPair()Ljava/security/KeyPair;

    move-result-object v0

    iput-object v0, p0, Lcom/subgraph/orchid/crypto/s;->bGy:Ljava/security/KeyPair;

    .line 71
    invoke-direct {p0}, Lcom/subgraph/orchid/crypto/s;->Mn()Ljavax/crypto/KeyAgreement;

    move-result-object v0

    iput-object v0, p0, Lcom/subgraph/orchid/crypto/s;->bGx:Ljavax/crypto/KeyAgreement;

    .line 72
    iput-object p1, p0, Lcom/subgraph/orchid/crypto/s;->bED:Lcom/subgraph/orchid/crypto/o;

    .line 74
    return-void
.end method

.method private final Mn()Ljavax/crypto/KeyAgreement;
    .registers 3

    .prologue
    .line 151
    :try_start_0
    const-string v0, "DH"

    invoke-static {v0}, Ljavax/crypto/KeyAgreement;->getInstance(Ljava/lang/String;)Ljavax/crypto/KeyAgreement;

    move-result-object v0

    .line 152
    iget-object v1, p0, Lcom/subgraph/orchid/crypto/s;->bGy:Ljava/security/KeyPair;

    invoke-virtual {v1}, Ljava/security/KeyPair;->getPrivate()Ljava/security/PrivateKey;

    move-result-object v1

    invoke-virtual {v0, v1}, Ljavax/crypto/KeyAgreement;->init(Ljava/security/Key;)V
    :try_end_f
    .catch Ljava/security/GeneralSecurityException; {:try_start_0 .. :try_end_f} :catch_10

    .line 153
    return-object v0

    .line 154
    :catch_10
    move-exception v0

    .line 155
    new-instance v1, Lcom/subgraph/orchid/TorException;

    invoke-direct {v1, v0}, Lcom/subgraph/orchid/TorException;-><init>(Ljava/lang/Throwable;)V

    throw v1
.end method

.method public static f(Ljava/math/BigInteger;)Z
    .registers 4

    .prologue
    const/4 v0, 0x0

    .line 124
    invoke-virtual {p0}, Ljava/math/BigInteger;->signum()I

    move-result v1

    if-lez v1, :cond_f

    sget-object v1, Ljava/math/BigInteger;->ONE:Ljava/math/BigInteger;

    invoke-virtual {p0, v1}, Ljava/math/BigInteger;->equals(Ljava/lang/Object;)Z

    move-result v1

    if-eqz v1, :cond_10

    .line 128
    :cond_f
    :goto_f
    return v0

    .line 126
    :cond_10
    sget-object v1, Lcom/subgraph/orchid/crypto/s;->bGu:Ljava/math/BigInteger;

    sget-object v2, Ljava/math/BigInteger;->ONE:Ljava/math/BigInteger;

    invoke-virtual {v1, v2}, Ljava/math/BigInteger;->subtract(Ljava/math/BigInteger;)Ljava/math/BigInteger;

    move-result-object v1

    invoke-virtual {p0, v1}, Ljava/math/BigInteger;->compareTo(Ljava/math/BigInteger;)I

    move-result v1

    if-gez v1, :cond_f

    .line 128
    const/4 v0, 0x1

    goto :goto_f
.end method

.method private g(Ljava/math/BigInteger;)[B
    .registers 6

    .prologue
    .line 140
    :try_start_0
    const-string v0, "DH"

    invoke-static {v0}, Ljava/security/KeyFactory;->getInstance(Ljava/lang/String;)Ljava/security/KeyFactory;

    move-result-object v0

    .line 141
    new-instance v1, Ljavax/crypto/spec/DHPublicKeySpec;

    sget-object v2, Lcom/subgraph/orchid/crypto/s;->bGu:Ljava/math/BigInteger;

    sget-object v3, Lcom/subgraph/orchid/crypto/s;->bGv:Ljava/math/BigInteger;

    invoke-direct {v1, p1, v2, v3}, Ljavax/crypto/spec/DHPublicKeySpec;-><init>(Ljava/math/BigInteger;Ljava/math/BigInteger;Ljava/math/BigInteger;)V

    .line 142
    invoke-virtual {v0, v1}, Ljava/security/KeyFactory;->generatePublic(Ljava/security/spec/KeySpec;)Ljava/security/PublicKey;

    move-result-object v0

    .line 143
    iget-object v1, p0, Lcom/subgraph/orchid/crypto/s;->bGx:Ljavax/crypto/KeyAgreement;

    const/4 v2, 0x1

    invoke-virtual {v1, v0, v2}, Ljavax/crypto/KeyAgreement;->doPhase(Ljava/security/Key;Z)Ljava/security/Key;

    .line 144
    iget-object v0, p0, Lcom/subgraph/orchid/crypto/s;->bGx:Ljavax/crypto/KeyAgreement;

    invoke-virtual {v0}, Ljavax/crypto/KeyAgreement;->generateSecret()[B
    :try_end_1e
    .catch Ljava/security/GeneralSecurityException; {:try_start_0 .. :try_end_1e} :catch_20

    move-result-object v0

    return-object v0

    .line 145
    :catch_20
    move-exception v0

    .line 146
    new-instance v1, Lcom/subgraph/orchid/TorException;

    invoke-direct {v1, v0}, Lcom/subgraph/orchid/TorException;-><init>(Ljava/lang/Throwable;)V

    throw v1
.end method

.method private static generateKeyPair()Ljava/security/KeyPair;
    .registers 2

    .prologue
    .line 161
    :try_start_0
    const-string v0, "DH"

    invoke-static {v0}, Ljava/security/KeyPairGenerator;->getInstance(Ljava/lang/String;)Ljava/security/KeyPairGenerator;

    move-result-object v0

    .line 162
    sget-object v1, Lcom/subgraph/orchid/crypto/s;->bGw:Ljavax/crypto/spec/DHParameterSpec;

    invoke-virtual {v0, v1}, Ljava/security/KeyPairGenerator;->initialize(Ljava/security/spec/AlgorithmParameterSpec;)V

    .line 163
    invoke-virtual {v0}, Ljava/security/KeyPairGenerator;->generateKeyPair()Ljava/security/KeyPair;
    :try_end_e
    .catch Ljava/security/GeneralSecurityException; {:try_start_0 .. :try_end_e} :catch_10

    move-result-object v0

    return-object v0

    .line 164
    :catch_10
    move-exception v0

    .line 165
    new-instance v1, Lcom/subgraph/orchid/TorException;

    invoke-direct {v1, v0}, Lcom/subgraph/orchid/TorException;-><init>(Ljava/lang/Throwable;)V

    throw v1
.end method


# virtual methods
.method public final a(Ljava/math/BigInteger;[B[B[B)Z
    .registers 7

    .prologue
    .line 187
    invoke-static {p1}, Lcom/subgraph/orchid/crypto/s;->f(Ljava/math/BigInteger;)Z

    move-result v0

    if-nez v0, :cond_e

    .line 188
    new-instance v0, Lcom/subgraph/orchid/TorException;

    const-string v1, "Illegal DH public value"

    invoke-direct {v0, v1}, Lcom/subgraph/orchid/TorException;-><init>(Ljava/lang/String;)V

    throw v0

    .line 190
    :cond_e
    invoke-direct {p0, p1}, Lcom/subgraph/orchid/crypto/s;->g(Ljava/math/BigInteger;)[B

    move-result-object v0

    .line 191
    new-instance v1, Lcom/subgraph/orchid/crypto/l;

    invoke-direct {v1, v0}, Lcom/subgraph/orchid/crypto/l;-><init>([B)V

    .line 192
    invoke-virtual {v1, p3, p4}, Lcom/subgraph/orchid/crypto/l;->g([B[B)V

    .line 193
    invoke-static {p4, p2}, Ljava/util/Arrays;->equals([B[B)Z

    move-result v0

    return v0
.end method

.method public final b([B[B[B)Z
    .registers 8

    .prologue
    .line 177
    invoke-static {p1}, Ljava/nio/ByteBuffer;->wrap([B)Ljava/nio/ByteBuffer;

    move-result-object v0

    .line 178
    const/16 v1, 0x80

    new-array v1, v1, [B

    .line 179
    const/16 v2, 0x14

    new-array v2, v2, [B

    .line 180
    invoke-virtual {v0, v1}, Ljava/nio/ByteBuffer;->get([B)Ljava/nio/ByteBuffer;

    .line 181
    invoke-virtual {v0, v2}, Ljava/nio/ByteBuffer;->get([B)Ljava/nio/ByteBuffer;

    .line 182
    new-instance v0, Ljava/math/BigInteger;

    const/4 v3, 0x1

    invoke-direct {v0, v3, v1}, Ljava/math/BigInteger;-><init>(I[B)V

    .line 183
    invoke-virtual {p0, v0, v2, p2, p3}, Lcom/subgraph/orchid/crypto/s;->a(Ljava/math/BigInteger;[B[B[B)Z

    move-result v0

    return v0
.end method

.method public final getPublicKeyBytes()[B
    .registers 7

    .prologue
    const/16 v5, 0x80

    const/4 v4, 0x0

    .line 97
    new-array v1, v5, [B

    .line 1086
    iget-object v0, p0, Lcom/subgraph/orchid/crypto/s;->bGy:Ljava/security/KeyPair;

    invoke-virtual {v0}, Ljava/security/KeyPair;->getPublic()Ljava/security/PublicKey;

    move-result-object v0

    check-cast v0, Ljavax/crypto/interfaces/DHPublicKey;

    .line 1087
    invoke-interface {v0}, Ljavax/crypto/interfaces/DHPublicKey;->getY()Ljava/math/BigInteger;

    move-result-object v0

    .line 98
    invoke-virtual {v0}, Ljava/math/BigInteger;->toByteArray()[B

    move-result-object v0

    .line 99
    aget-byte v2, v0, v4

    if-nez v2, :cond_23

    array-length v2, v0

    const/16 v3, 0x81

    if-ne v2, v3, :cond_23

    .line 100
    const/4 v2, 0x1

    invoke-static {v0, v2, v1, v4, v5}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    .line 107
    :goto_22
    return-object v1

    .line 101
    :cond_23
    array-length v2, v0

    if-gt v2, v5, :cond_2e

    .line 102
    array-length v2, v0

    rsub-int v2, v2, 0x80

    .line 103
    array-length v3, v0

    invoke-static {v0, v4, v1, v2, v3}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    goto :goto_22

    .line 105
    :cond_2e
    new-instance v0, Ljava/lang/IllegalStateException;

    const-string v1, "Public value is longer than DH_LEN but not because of sign bit"

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

    throw v0
.end method