SecP256K1FieldElement.smali

.class public Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;
.super Lorg/spongycastle/math/ec/ECFieldElement;
.source "SecP256K1FieldElement.java"


# static fields
.field public static final Q:Ljava/math/BigInteger;


# instance fields
.field protected x:[I


# direct methods
.method static constructor <clinit>()V
    .registers 1

    .prologue
    .line 12
    sget-object v0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Curve;->q:Ljava/math/BigInteger;

    sput-object v0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->Q:Ljava/math/BigInteger;

    return-void
.end method

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

    .prologue
    .line 27
    invoke-direct {p0}, Lorg/spongycastle/math/ec/ECFieldElement;-><init>()V

    .line 28
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v0

    iput-object v0, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    .line 29
    return-void
.end method

.method public constructor <init>(Ljava/math/BigInteger;)V
    .registers 4

    .prologue
    .line 17
    invoke-direct {p0}, Lorg/spongycastle/math/ec/ECFieldElement;-><init>()V

    .line 18
    if-eqz p1, :cond_13

    invoke-virtual {p1}, Ljava/math/BigInteger;->signum()I

    move-result v0

    if-ltz v0, :cond_13

    sget-object v0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->Q:Ljava/math/BigInteger;

    invoke-virtual {p1, v0}, Ljava/math/BigInteger;->compareTo(Ljava/math/BigInteger;)I

    move-result v0

    if-ltz v0, :cond_1b

    .line 20
    :cond_13
    new-instance v0, Ljava/lang/IllegalArgumentException;

    const-string v1, "x value invalid for SecP256K1FieldElement"

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

    throw v0

    .line 23
    :cond_1b
    invoke-static {p1}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->fromBigInteger(Ljava/math/BigInteger;)[I

    move-result-object v0

    iput-object v0, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    .line 24
    return-void
.end method

.method protected constructor <init>([I)V
    .registers 2

    .prologue
    .line 32
    invoke-direct {p0}, Lorg/spongycastle/math/ec/ECFieldElement;-><init>()V

    .line 33
    iput-object p1, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    .line 34
    return-void
.end method


# virtual methods
.method public add(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;
    .registers 5

    .prologue
    .line 68
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v0

    .line 69
    iget-object v1, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    check-cast p1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    iget-object v2, p1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    invoke-static {v1, v2, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->add([I[I[I)V

    .line 70
    new-instance v1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    invoke-direct {v1, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;-><init>([I)V

    return-object v1
.end method

.method public addOne()Lorg/spongycastle/math/ec/ECFieldElement;
    .registers 3

    .prologue
    .line 75
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v0

    .line 76
    iget-object v1, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    invoke-static {v1, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->addOne([I[I)V

    .line 77
    new-instance v1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    invoke-direct {v1, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;-><init>([I)V

    return-object v1
.end method

.method public divide(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;
    .registers 5

    .prologue
    .line 97
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v0

    .line 98
    sget-object v1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->P:[I

    check-cast p1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    iget-object v2, p1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    invoke-static {v1, v2, v0}, Lorg/spongycastle/math/raw/Mod;->invert([I[I[I)V

    .line 99
    iget-object v1, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    invoke-static {v0, v1, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 100
    new-instance v1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    invoke-direct {v1, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;-><init>([I)V

    return-object v1
.end method

.method public equals(Ljava/lang/Object;)Z
    .registers 4

    .prologue
    .line 197
    if-ne p1, p0, :cond_4

    .line 199
    const/4 v0, 0x1

    .line 208
    :goto_3
    return v0

    .line 202
    :cond_4
    instance-of v0, p1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    if-nez v0, :cond_a

    .line 204
    const/4 v0, 0x0

    goto :goto_3

    .line 207
    :cond_a
    check-cast p1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    .line 208
    iget-object v0, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    iget-object v1, p1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    invoke-static {v0, v1}, Lorg/spongycastle/math/raw/Nat256;->eq([I[I)Z

    move-result v0

    goto :goto_3
.end method

.method public getFieldName()Ljava/lang/String;
    .registers 2

    .prologue
    .line 58
    const-string v0, "SecP256K1Field"

    return-object v0
.end method

.method public getFieldSize()I
    .registers 2

    .prologue
    .line 63
    sget-object v0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->Q:Ljava/math/BigInteger;

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

    move-result v0

    return v0
.end method

.method public hashCode()I
    .registers 5

    .prologue
    .line 213
    sget-object v0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->Q:Ljava/math/BigInteger;

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

    move-result v0

    iget-object v1, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    const/4 v2, 0x0

    const/16 v3, 0x8

    invoke-static {v1, v2, v3}, Lorg/spongycastle/util/Arrays;->hashCode([III)I

    move-result v1

    xor-int/2addr v0, v1

    return v0
.end method

.method public invert()Lorg/spongycastle/math/ec/ECFieldElement;
    .registers 4

    .prologue
    .line 120
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v0

    .line 121
    sget-object v1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->P:[I

    iget-object v2, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    invoke-static {v1, v2, v0}, Lorg/spongycastle/math/raw/Mod;->invert([I[I[I)V

    .line 122
    new-instance v1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    invoke-direct {v1, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;-><init>([I)V

    return-object v1
.end method

.method public isOne()Z
    .registers 2

    .prologue
    .line 43
    iget-object v0, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    invoke-static {v0}, Lorg/spongycastle/math/raw/Nat256;->isOne([I)Z

    move-result v0

    return v0
.end method

.method public isZero()Z
    .registers 2

    .prologue
    .line 38
    iget-object v0, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    invoke-static {v0}, Lorg/spongycastle/math/raw/Nat256;->isZero([I)Z

    move-result v0

    return v0
.end method

.method public multiply(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;
    .registers 5

    .prologue
    .line 89
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v0

    .line 90
    iget-object v1, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    check-cast p1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    iget-object v2, p1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    invoke-static {v1, v2, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 91
    new-instance v1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    invoke-direct {v1, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;-><init>([I)V

    return-object v1
.end method

.method public negate()Lorg/spongycastle/math/ec/ECFieldElement;
    .registers 3

    .prologue
    .line 105
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v0

    .line 106
    iget-object v1, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    invoke-static {v1, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->negate([I[I)V

    .line 107
    new-instance v1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    invoke-direct {v1, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;-><init>([I)V

    return-object v1
.end method

.method public sqrt()Lorg/spongycastle/math/ec/ECFieldElement;
    .registers 12

    .prologue
    const/16 v10, 0x2c

    const/4 v9, 0x2

    const/4 v8, 0x3

    .line 142
    iget-object v0, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    .line 143
    invoke-static {v0}, Lorg/spongycastle/math/raw/Nat256;->isZero([I)Z

    move-result v1

    if-nez v1, :cond_12

    invoke-static {v0}, Lorg/spongycastle/math/raw/Nat256;->isOne([I)Z

    move-result v1

    if-eqz v1, :cond_13

    .line 192
    :cond_12
    :goto_12
    return-object p0

    .line 148
    :cond_13
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v1

    .line 149
    invoke-static {v0, v1}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->square([I[I)V

    .line 150
    invoke-static {v1, v0, v1}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 151
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v2

    .line 152
    invoke-static {v1, v2}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->square([I[I)V

    .line 153
    invoke-static {v2, v0, v2}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 154
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v3

    .line 155
    invoke-static {v2, v8, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->squareN([II[I)V

    .line 156
    invoke-static {v3, v2, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 158
    invoke-static {v3, v8, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->squareN([II[I)V

    .line 159
    invoke-static {v3, v2, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 161
    invoke-static {v3, v9, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->squareN([II[I)V

    .line 162
    invoke-static {v3, v1, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 163
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v4

    .line 164
    const/16 v5, 0xb

    invoke-static {v3, v5, v4}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->squareN([II[I)V

    .line 165
    invoke-static {v4, v3, v4}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 167
    const/16 v5, 0x16

    invoke-static {v4, v5, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->squareN([II[I)V

    .line 168
    invoke-static {v3, v4, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 169
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v5

    .line 170
    invoke-static {v3, v10, v5}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->squareN([II[I)V

    .line 171
    invoke-static {v5, v3, v5}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 172
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v6

    .line 173
    const/16 v7, 0x58

    invoke-static {v5, v7, v6}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->squareN([II[I)V

    .line 174
    invoke-static {v6, v5, v6}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 176
    invoke-static {v6, v10, v5}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->squareN([II[I)V

    .line 177
    invoke-static {v5, v3, v5}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 179
    invoke-static {v5, v8, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->squareN([II[I)V

    .line 180
    invoke-static {v3, v2, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 183
    const/16 v2, 0x17

    invoke-static {v3, v2, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->squareN([II[I)V

    .line 184
    invoke-static {v3, v4, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 185
    const/4 v2, 0x6

    invoke-static {v3, v2, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->squareN([II[I)V

    .line 186
    invoke-static {v3, v1, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->multiply([I[I[I)V

    .line 187
    invoke-static {v3, v9, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->squareN([II[I)V

    .line 190
    invoke-static {v3, v1}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->square([I[I)V

    .line 192
    invoke-static {v0, v1}, Lorg/spongycastle/math/raw/Nat256;->eq([I[I)Z

    move-result v0

    if-eqz v0, :cond_95

    new-instance p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    invoke-direct {p0, v3}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;-><init>([I)V

    goto/16 :goto_12

    :cond_95
    const/4 p0, 0x0

    goto/16 :goto_12
.end method

.method public square()Lorg/spongycastle/math/ec/ECFieldElement;
    .registers 3

    .prologue
    .line 112
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v0

    .line 113
    iget-object v1, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    invoke-static {v1, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->square([I[I)V

    .line 114
    new-instance v1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    invoke-direct {v1, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;-><init>([I)V

    return-object v1
.end method

.method public subtract(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;
    .registers 5

    .prologue
    .line 82
    invoke-static {}, Lorg/spongycastle/math/raw/Nat256;->create()[I

    move-result-object v0

    .line 83
    iget-object v1, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    check-cast p1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    iget-object v2, p1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    invoke-static {v1, v2, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1Field;->subtract([I[I[I)V

    .line 84
    new-instance v1, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;

    invoke-direct {v1, v0}, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;-><init>([I)V

    return-object v1
.end method

.method public testBitZero()Z
    .registers 4

    .prologue
    const/4 v0, 0x1

    const/4 v1, 0x0

    .line 48
    iget-object v2, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    invoke-static {v2, v1}, Lorg/spongycastle/math/raw/Nat256;->getBit([II)I

    move-result v2

    if-ne v2, v0, :cond_b

    :goto_a
    return v0

    :cond_b
    move v0, v1

    goto :goto_a
.end method

.method public toBigInteger()Ljava/math/BigInteger;
    .registers 2

    .prologue
    .line 53
    iget-object v0, p0, Lorg/spongycastle/math/ec/custom/sec/SecP256K1FieldElement;->x:[I

    invoke-static {v0}, Lorg/spongycastle/math/raw/Nat256;->toBigInteger([I)Ljava/math/BigInteger;

    move-result-object v0

    return-object v0
.end method