ECCurve$AbstractFp.smali

.class public abstract Lorg/spongycastle/math/ec/ECCurve$AbstractFp;
.super Lorg/spongycastle/math/ec/ECCurve;
.source "ECCurve.java"


# direct methods
.method protected constructor <init>(Ljava/math/BigInteger;)V
    .registers 3

    .prologue
    .line 503
    invoke-static {p1}, Lorg/spongycastle/math/field/FiniteFields;->getPrimeField(Ljava/math/BigInteger;)Lorg/spongycastle/math/field/FiniteField;

    move-result-object v0

    invoke-direct {p0, v0}, Lorg/spongycastle/math/ec/ECCurve;-><init>(Lorg/spongycastle/math/field/FiniteField;)V

    .line 504
    return-void
.end method


# virtual methods
.method protected decompressPoint(ILjava/math/BigInteger;)Lorg/spongycastle/math/ec/ECPoint;
    .registers 8

    .prologue
    const/4 v2, 0x1

    .line 513
    invoke-virtual {p0, p2}, Lorg/spongycastle/math/ec/ECCurve$AbstractFp;->fromBigInteger(Ljava/math/BigInteger;)Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v3

    .line 514
    invoke-virtual {v3}, Lorg/spongycastle/math/ec/ECFieldElement;->square()Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v0

    iget-object v1, p0, Lorg/spongycastle/math/ec/ECCurve$AbstractFp;->a:Lorg/spongycastle/math/ec/ECFieldElement;

    invoke-virtual {v0, v1}, Lorg/spongycastle/math/ec/ECFieldElement;->add(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v0

    invoke-virtual {v0, v3}, Lorg/spongycastle/math/ec/ECFieldElement;->multiply(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v0

    iget-object v1, p0, Lorg/spongycastle/math/ec/ECCurve$AbstractFp;->b:Lorg/spongycastle/math/ec/ECFieldElement;

    invoke-virtual {v0, v1}, Lorg/spongycastle/math/ec/ECFieldElement;->add(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v0

    .line 515
    invoke-virtual {v0}, Lorg/spongycastle/math/ec/ECFieldElement;->sqrt()Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v0

    .line 520
    if-nez v0, :cond_27

    .line 522
    new-instance v0, Ljava/lang/IllegalArgumentException;

    const-string v1, "Invalid point compression"

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

    throw v0

    .line 525
    :cond_27
    invoke-virtual {v0}, Lorg/spongycastle/math/ec/ECFieldElement;->testBitZero()Z

    move-result v4

    if-ne p1, v2, :cond_39

    move v1, v2

    :goto_2e
    if-eq v4, v1, :cond_34

    .line 528
    invoke-virtual {v0}, Lorg/spongycastle/math/ec/ECFieldElement;->negate()Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v0

    .line 531
    :cond_34
    invoke-virtual {p0, v3, v0, v2}, Lorg/spongycastle/math/ec/ECCurve$AbstractFp;->createRawPoint(Lorg/spongycastle/math/ec/ECFieldElement;Lorg/spongycastle/math/ec/ECFieldElement;Z)Lorg/spongycastle/math/ec/ECPoint;

    move-result-object v0

    return-object v0

    .line 525
    :cond_39
    const/4 v1, 0x0

    goto :goto_2e
.end method

.method public isValidFieldElement(Ljava/math/BigInteger;)Z
    .registers 3

    .prologue
    .line 508
    if-eqz p1, :cond_18

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

    move-result v0

    if-ltz v0, :cond_18

    invoke-virtual {p0}, Lorg/spongycastle/math/ec/ECCurve$AbstractFp;->getField()Lorg/spongycastle/math/field/FiniteField;

    move-result-object v0

    invoke-interface {v0}, Lorg/spongycastle/math/field/FiniteField;->getCharacteristic()Ljava/math/BigInteger;

    move-result-object v0

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

    move-result v0

    if-gez v0, :cond_18

    const/4 v0, 0x1

    :goto_17
    return v0

    :cond_18
    const/4 v0, 0x0

    goto :goto_17
.end method