KeyAgreementSpi.smali

.class public Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;
.super Lorg/spongycastle/jcajce/provider/asymmetric/util/BaseAgreementSpi;
.source "KeyAgreementSpi.java"


# instance fields
.field private g:Ljava/math/BigInteger;

.field private p:Ljava/math/BigInteger;

.field private x:Ljava/math/BigInteger;


# direct methods
.method public constructor <init>()V
    .registers 3

    .prologue
    .line 38
    const-string v0, "Diffie-Hellman"

    const/4 v1, 0x0

    invoke-direct {p0, v0, v1}, Lorg/spongycastle/jcajce/provider/asymmetric/util/BaseAgreementSpi;-><init>(Ljava/lang/String;Lorg/spongycastle/crypto/DerivationFunction;)V

    .line 39
    return-void
.end method

.method public constructor <init>(Ljava/lang/String;Lorg/spongycastle/crypto/DerivationFunction;)V
    .registers 3

    .prologue
    .line 45
    invoke-direct {p0, p1, p2}, Lorg/spongycastle/jcajce/provider/asymmetric/util/BaseAgreementSpi;-><init>(Ljava/lang/String;Lorg/spongycastle/crypto/DerivationFunction;)V

    .line 46
    return-void
.end method


# virtual methods
.method protected bigIntToBytes(Ljava/math/BigInteger;)[B
    .registers 7

    .prologue
    const/4 v4, 0x0

    .line 55
    iget-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->p:Ljava/math/BigInteger;

    invoke-virtual {v0}, Ljava/math/BigInteger;->bitLength()I

    move-result v0

    add-int/lit8 v0, v0, 0x7

    div-int/lit8 v2, v0, 0x8

    .line 57
    invoke-virtual {p1}, Ljava/math/BigInteger;->toByteArray()[B

    move-result-object v0

    .line 59
    array-length v1, v0

    if-ne v1, v2, :cond_13

    .line 78
    :goto_12
    return-object v0

    .line 64
    :cond_13
    aget-byte v1, v0, v4

    if-nez v1, :cond_28

    array-length v1, v0

    add-int/lit8 v3, v2, 0x1

    if-ne v1, v3, :cond_28

    .line 66
    array-length v1, v0

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

    new-array v1, v1, [B

    .line 68
    const/4 v2, 0x1

    array-length v3, v1

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

    move-object v0, v1

    .line 69
    goto :goto_12

    .line 74
    :cond_28
    new-array v1, v2, [B

    .line 76
    array-length v3, v0

    sub-int/2addr v2, v3

    array-length v3, v0

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

    move-object v0, v1

    .line 78
    goto :goto_12
.end method

.method protected engineDoPhase(Ljava/security/Key;Z)Ljava/security/Key;
    .registers 7

    .prologue
    .line 86
    iget-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->x:Ljava/math/BigInteger;

    if-nez v0, :cond_c

    .line 88
    new-instance v0, Ljava/lang/IllegalStateException;

    const-string v1, "Diffie-Hellman not initialised."

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

    throw v0

    .line 91
    :cond_c
    instance-of v0, p1, Ljavax/crypto/interfaces/DHPublicKey;

    if-nez v0, :cond_18

    .line 93
    new-instance v0, Ljava/security/InvalidKeyException;

    const-string v1, "DHKeyAgreement doPhase requires DHPublicKey"

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

    throw v0

    :cond_18
    move-object v0, p1

    .line 95
    check-cast v0, Ljavax/crypto/interfaces/DHPublicKey;

    .line 97
    invoke-interface {v0}, Ljavax/crypto/interfaces/DHPublicKey;->getParams()Ljavax/crypto/spec/DHParameterSpec;

    move-result-object v1

    invoke-virtual {v1}, Ljavax/crypto/spec/DHParameterSpec;->getG()Ljava/math/BigInteger;

    move-result-object v1

    iget-object v2, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->g:Ljava/math/BigInteger;

    invoke-virtual {v1, v2}, Ljava/math/BigInteger;->equals(Ljava/lang/Object;)Z

    move-result v1

    if-eqz v1, :cond_3b

    invoke-interface {v0}, Ljavax/crypto/interfaces/DHPublicKey;->getParams()Ljavax/crypto/spec/DHParameterSpec;

    move-result-object v1

    invoke-virtual {v1}, Ljavax/crypto/spec/DHParameterSpec;->getP()Ljava/math/BigInteger;

    move-result-object v1

    iget-object v2, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->p:Ljava/math/BigInteger;

    invoke-virtual {v1, v2}, Ljava/math/BigInteger;->equals(Ljava/lang/Object;)Z

    move-result v1

    if-nez v1, :cond_43

    .line 99
    :cond_3b
    new-instance v0, Ljava/security/InvalidKeyException;

    const-string v1, "DHPublicKey not for this KeyAgreement!"

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

    throw v0

    .line 102
    :cond_43
    if-eqz p2, :cond_57

    .line 104
    check-cast p1, Ljavax/crypto/interfaces/DHPublicKey;

    invoke-interface {p1}, Ljavax/crypto/interfaces/DHPublicKey;->getY()Ljava/math/BigInteger;

    move-result-object v0

    iget-object v1, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->x:Ljava/math/BigInteger;

    iget-object v2, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->p:Ljava/math/BigInteger;

    invoke-virtual {v0, v1, v2}, Ljava/math/BigInteger;->modPow(Ljava/math/BigInteger;Ljava/math/BigInteger;)Ljava/math/BigInteger;

    move-result-object v0

    iput-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->result:Ljava/math/BigInteger;

    .line 105
    const/4 v0, 0x0

    .line 112
    :goto_56
    return-object v0

    .line 109
    :cond_57
    check-cast p1, Ljavax/crypto/interfaces/DHPublicKey;

    invoke-interface {p1}, Ljavax/crypto/interfaces/DHPublicKey;->getY()Ljava/math/BigInteger;

    move-result-object v1

    iget-object v2, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->x:Ljava/math/BigInteger;

    iget-object v3, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->p:Ljava/math/BigInteger;

    invoke-virtual {v1, v2, v3}, Ljava/math/BigInteger;->modPow(Ljava/math/BigInteger;Ljava/math/BigInteger;)Ljava/math/BigInteger;

    move-result-object v1

    iput-object v1, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->result:Ljava/math/BigInteger;

    .line 112
    new-instance v1, Lorg/spongycastle/jcajce/provider/asymmetric/dh/BCDHPublicKey;

    iget-object v2, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->result:Ljava/math/BigInteger;

    invoke-interface {v0}, Ljavax/crypto/interfaces/DHPublicKey;->getParams()Ljavax/crypto/spec/DHParameterSpec;

    move-result-object v0

    invoke-direct {v1, v2, v0}, Lorg/spongycastle/jcajce/provider/asymmetric/dh/BCDHPublicKey;-><init>(Ljava/math/BigInteger;Ljavax/crypto/spec/DHParameterSpec;)V

    move-object v0, v1

    goto :goto_56
.end method

.method protected engineGenerateSecret([BI)I
    .registers 5

    .prologue
    .line 131
    iget-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->x:Ljava/math/BigInteger;

    if-nez v0, :cond_c

    .line 133
    new-instance v0, Ljava/lang/IllegalStateException;

    const-string v1, "Diffie-Hellman not initialised."

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

    throw v0

    .line 136
    :cond_c
    invoke-super {p0, p1, p2}, Lorg/spongycastle/jcajce/provider/asymmetric/util/BaseAgreementSpi;->engineGenerateSecret([BI)I

    move-result v0

    return v0
.end method

.method protected engineGenerateSecret(Ljava/lang/String;)Ljavax/crypto/SecretKey;
    .registers 4

    .prologue
    .line 143
    iget-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->x:Ljava/math/BigInteger;

    if-nez v0, :cond_c

    .line 145
    new-instance v0, Ljava/lang/IllegalStateException;

    const-string v1, "Diffie-Hellman not initialised."

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

    throw v0

    .line 148
    :cond_c
    iget-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->result:Ljava/math/BigInteger;

    invoke-virtual {p0, v0}, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->bigIntToBytes(Ljava/math/BigInteger;)[B

    move-result-object v1

    .line 151
    const-string v0, "TlsPremasterSecret"

    invoke-virtual {p1, v0}, Ljava/lang/String;->equals(Ljava/lang/Object;)Z

    move-result v0

    if-eqz v0, :cond_24

    .line 153
    new-instance v0, Ljavax/crypto/spec/SecretKeySpec;

    invoke-static {v1}, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->trimZeroes([B)[B

    move-result-object v1

    invoke-direct {v0, v1, p1}, Ljavax/crypto/spec/SecretKeySpec;-><init>([BLjava/lang/String;)V

    .line 156
    :goto_23
    return-object v0

    :cond_24
    invoke-super {p0, p1}, Lorg/spongycastle/jcajce/provider/asymmetric/util/BaseAgreementSpi;->engineGenerateSecret(Ljava/lang/String;)Ljavax/crypto/SecretKey;

    move-result-object v0

    goto :goto_23
.end method

.method protected engineGenerateSecret()[B
    .registers 3

    .prologue
    .line 118
    iget-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->x:Ljava/math/BigInteger;

    if-nez v0, :cond_c

    .line 120
    new-instance v0, Ljava/lang/IllegalStateException;

    const-string v1, "Diffie-Hellman not initialised."

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

    throw v0

    .line 123
    :cond_c
    invoke-super {p0}, Lorg/spongycastle/jcajce/provider/asymmetric/util/BaseAgreementSpi;->engineGenerateSecret()[B

    move-result-object v0

    return-object v0
.end method

.method protected engineInit(Ljava/security/Key;Ljava/security/SecureRandom;)V
    .registers 5

    .prologue
    .line 205
    instance-of v0, p1, Ljavax/crypto/interfaces/DHPrivateKey;

    if-nez v0, :cond_c

    .line 207
    new-instance v0, Ljava/security/InvalidKeyException;

    const-string v1, "DHKeyAgreement requires DHPrivateKey"

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

    throw v0

    .line 210
    :cond_c
    check-cast p1, Ljavax/crypto/interfaces/DHPrivateKey;

    .line 212
    invoke-interface {p1}, Ljavax/crypto/interfaces/DHPrivateKey;->getParams()Ljavax/crypto/spec/DHParameterSpec;

    move-result-object v0

    invoke-virtual {v0}, Ljavax/crypto/spec/DHParameterSpec;->getP()Ljava/math/BigInteger;

    move-result-object v0

    iput-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->p:Ljava/math/BigInteger;

    .line 213
    invoke-interface {p1}, Ljavax/crypto/interfaces/DHPrivateKey;->getParams()Ljavax/crypto/spec/DHParameterSpec;

    move-result-object v0

    invoke-virtual {v0}, Ljavax/crypto/spec/DHParameterSpec;->getG()Ljava/math/BigInteger;

    move-result-object v0

    iput-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->g:Ljava/math/BigInteger;

    .line 214
    invoke-interface {p1}, Ljavax/crypto/interfaces/DHPrivateKey;->getX()Ljava/math/BigInteger;

    move-result-object v0

    iput-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->result:Ljava/math/BigInteger;

    iput-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->x:Ljava/math/BigInteger;

    .line 215
    return-void
.end method

.method protected engineInit(Ljava/security/Key;Ljava/security/spec/AlgorithmParameterSpec;Ljava/security/SecureRandom;)V
    .registers 6

    .prologue
    .line 165
    instance-of v0, p1, Ljavax/crypto/interfaces/DHPrivateKey;

    if-nez v0, :cond_c

    .line 167
    new-instance v0, Ljava/security/InvalidKeyException;

    const-string v1, "DHKeyAgreement requires DHPrivateKey for initialisation"

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

    throw v0

    .line 169
    :cond_c
    check-cast p1, Ljavax/crypto/interfaces/DHPrivateKey;

    .line 171
    if-eqz p2, :cond_54

    .line 173
    instance-of v0, p2, Ljavax/crypto/spec/DHParameterSpec;

    if-eqz v0, :cond_2b

    .line 175
    check-cast p2, Ljavax/crypto/spec/DHParameterSpec;

    .line 177
    invoke-virtual {p2}, Ljavax/crypto/spec/DHParameterSpec;->getP()Ljava/math/BigInteger;

    move-result-object v0

    iput-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->p:Ljava/math/BigInteger;

    .line 178
    invoke-virtual {p2}, Ljavax/crypto/spec/DHParameterSpec;->getG()Ljava/math/BigInteger;

    move-result-object v0

    iput-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->g:Ljava/math/BigInteger;

    .line 197
    :goto_22
    invoke-interface {p1}, Ljavax/crypto/interfaces/DHPrivateKey;->getX()Ljava/math/BigInteger;

    move-result-object v0

    iput-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->result:Ljava/math/BigInteger;

    iput-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->x:Ljava/math/BigInteger;

    .line 198
    return-void

    .line 180
    :cond_2b
    instance-of v0, p2, Lorg/spongycastle/jcajce/spec/UserKeyingMaterialSpec;

    if-eqz v0, :cond_4c

    .line 182
    invoke-interface {p1}, Ljavax/crypto/interfaces/DHPrivateKey;->getParams()Ljavax/crypto/spec/DHParameterSpec;

    move-result-object v0

    invoke-virtual {v0}, Ljavax/crypto/spec/DHParameterSpec;->getP()Ljava/math/BigInteger;

    move-result-object v0

    iput-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->p:Ljava/math/BigInteger;

    .line 183
    invoke-interface {p1}, Ljavax/crypto/interfaces/DHPrivateKey;->getParams()Ljavax/crypto/spec/DHParameterSpec;

    move-result-object v0

    invoke-virtual {v0}, Ljavax/crypto/spec/DHParameterSpec;->getG()Ljava/math/BigInteger;

    move-result-object v0

    iput-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->g:Ljava/math/BigInteger;

    .line 184
    check-cast p2, Lorg/spongycastle/jcajce/spec/UserKeyingMaterialSpec;

    invoke-virtual {p2}, Lorg/spongycastle/jcajce/spec/UserKeyingMaterialSpec;->getUserKeyingMaterial()[B

    move-result-object v0

    iput-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->ukmParameters:[B

    goto :goto_22

    .line 188
    :cond_4c
    new-instance v0, Ljava/security/InvalidAlgorithmParameterException;

    const-string v1, "DHKeyAgreement only accepts DHParameterSpec"

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

    throw v0

    .line 193
    :cond_54
    invoke-interface {p1}, Ljavax/crypto/interfaces/DHPrivateKey;->getParams()Ljavax/crypto/spec/DHParameterSpec;

    move-result-object v0

    invoke-virtual {v0}, Ljavax/crypto/spec/DHParameterSpec;->getP()Ljava/math/BigInteger;

    move-result-object v0

    iput-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->p:Ljava/math/BigInteger;

    .line 194
    invoke-interface {p1}, Ljavax/crypto/interfaces/DHPrivateKey;->getParams()Ljavax/crypto/spec/DHParameterSpec;

    move-result-object v0

    invoke-virtual {v0}, Ljavax/crypto/spec/DHParameterSpec;->getG()Ljava/math/BigInteger;

    move-result-object v0

    iput-object v0, p0, Lorg/spongycastle/jcajce/provider/asymmetric/dh/KeyAgreementSpi;->g:Ljava/math/BigInteger;

    goto :goto_22
.end method