ECPointUtil.smali

.class public Lorg/spongycastle/jce/ECPointUtil;
.super Ljava/lang/Object;
.source "ECPointUtil.java"


# direct methods
.method public constructor <init>()V
    .registers 1

    .prologue
    .line 13
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    return-void
.end method

.method public static decodePoint(Ljava/security/spec/EllipticCurve;[B)Ljava/security/spec/ECPoint;
    .registers 9

    .prologue
    const/4 v5, 0x0

    .line 31
    invoke-virtual {p0}, Ljava/security/spec/EllipticCurve;->getField()Ljava/security/spec/ECField;

    move-result-object v0

    instance-of v0, v0, Ljava/security/spec/ECFieldFp;

    if-eqz v0, :cond_3b

    .line 33
    new-instance v1, Lorg/spongycastle/math/ec/ECCurve$Fp;

    .line 34
    invoke-virtual {p0}, Ljava/security/spec/EllipticCurve;->getField()Ljava/security/spec/ECField;

    move-result-object v0

    check-cast v0, Ljava/security/spec/ECFieldFp;

    invoke-virtual {v0}, Ljava/security/spec/ECFieldFp;->getP()Ljava/math/BigInteger;

    move-result-object v0

    invoke-virtual {p0}, Ljava/security/spec/EllipticCurve;->getA()Ljava/math/BigInteger;

    move-result-object v2

    invoke-virtual {p0}, Ljava/security/spec/EllipticCurve;->getB()Ljava/math/BigInteger;

    move-result-object v3

    invoke-direct {v1, v0, v2, v3}, Lorg/spongycastle/math/ec/ECCurve$Fp;-><init>(Ljava/math/BigInteger;Ljava/math/BigInteger;Ljava/math/BigInteger;)V

    move-object v0, v1

    .line 52
    :goto_21
    invoke-virtual {v0, p1}, Lorg/spongycastle/math/ec/ECCurve;->decodePoint([B)Lorg/spongycastle/math/ec/ECPoint;

    move-result-object v0

    .line 54
    new-instance v1, Ljava/security/spec/ECPoint;

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

    move-result-object v2

    invoke-virtual {v2}, Lorg/spongycastle/math/ec/ECFieldElement;->toBigInteger()Ljava/math/BigInteger;

    move-result-object v2

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

    move-result-object v0

    invoke-virtual {v0}, Lorg/spongycastle/math/ec/ECFieldElement;->toBigInteger()Ljava/math/BigInteger;

    move-result-object v0

    invoke-direct {v1, v2, v0}, Ljava/security/spec/ECPoint;-><init>(Ljava/math/BigInteger;Ljava/math/BigInteger;)V

    return-object v1

    .line 38
    :cond_3b
    invoke-virtual {p0}, Ljava/security/spec/EllipticCurve;->getField()Ljava/security/spec/ECField;

    move-result-object v0

    check-cast v0, Ljava/security/spec/ECFieldF2m;

    invoke-virtual {v0}, Ljava/security/spec/ECFieldF2m;->getMidTermsOfReductionPolynomial()[I

    move-result-object v4

    .line 40
    array-length v0, v4

    const/4 v1, 0x3

    if-ne v0, v1, :cond_69

    .line 42
    new-instance v0, Lorg/spongycastle/math/ec/ECCurve$F2m;

    .line 43
    invoke-virtual {p0}, Ljava/security/spec/EllipticCurve;->getField()Ljava/security/spec/ECField;

    move-result-object v1

    check-cast v1, Ljava/security/spec/ECFieldF2m;

    invoke-virtual {v1}, Ljava/security/spec/ECFieldF2m;->getM()I

    move-result v1

    const/4 v2, 0x2

    aget v2, v4, v2

    const/4 v3, 0x1

    aget v3, v4, v3

    aget v4, v4, v5

    invoke-virtual {p0}, Ljava/security/spec/EllipticCurve;->getA()Ljava/math/BigInteger;

    move-result-object v5

    invoke-virtual {p0}, Ljava/security/spec/EllipticCurve;->getB()Ljava/math/BigInteger;

    move-result-object v6

    invoke-direct/range {v0 .. v6}, Lorg/spongycastle/math/ec/ECCurve$F2m;-><init>(IIIILjava/math/BigInteger;Ljava/math/BigInteger;)V

    goto :goto_21

    .line 47
    :cond_69
    new-instance v1, Lorg/spongycastle/math/ec/ECCurve$F2m;

    .line 48
    invoke-virtual {p0}, Ljava/security/spec/EllipticCurve;->getField()Ljava/security/spec/ECField;

    move-result-object v0

    check-cast v0, Ljava/security/spec/ECFieldF2m;

    invoke-virtual {v0}, Ljava/security/spec/ECFieldF2m;->getM()I

    move-result v0

    aget v2, v4, v5

    invoke-virtual {p0}, Ljava/security/spec/EllipticCurve;->getA()Ljava/math/BigInteger;

    move-result-object v3

    invoke-virtual {p0}, Ljava/security/spec/EllipticCurve;->getB()Ljava/math/BigInteger;

    move-result-object v4

    invoke-direct {v1, v0, v2, v3, v4}, Lorg/spongycastle/math/ec/ECCurve$F2m;-><init>(IILjava/math/BigInteger;Ljava/math/BigInteger;)V

    move-object v0, v1

    goto :goto_21
.end method