Keys.smali

.class public Lorg/web3j/crypto/Keys;
.super Ljava/lang/Object;
.source "Keys.java"


# static fields
.field public static final ADDRESS_LENGTH_IN_HEX:I = 0x28

.field public static final ADDRESS_SIZE:I = 0xa0

.field public static final PRIVATE_KEY_LENGTH_IN_HEX:I = 0x40

.field static final PRIVATE_KEY_SIZE:I = 0x20

.field static final PUBLIC_KEY_LENGTH_IN_HEX:I = 0x80

.field static final PUBLIC_KEY_SIZE:I = 0x40


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

    .prologue
    .line 35
    new-instance v0, Lorg/spongycastle/jce/provider/BouncyCastleProvider;

    invoke-direct {v0}, Lorg/spongycastle/jce/provider/BouncyCastleProvider;-><init>()V

    invoke-static {v0}, Ljava/security/Security;->addProvider(Ljava/security/Provider;)I

    .line 36
    return-void
.end method

.method private constructor <init>()V
    .registers 1

    .prologue
    .line 38
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    return-void
.end method

.method public static createEcKeyPair()Lorg/web3j/crypto/ECKeyPair;
    .registers 1

    .prologue
    .line 58
    invoke-static {}, Lorg/web3j/crypto/Keys;->createSecp256k1KeyPair()Ljava/security/KeyPair;

    move-result-object v0

    .line 59
    invoke-static {v0}, Lorg/web3j/crypto/ECKeyPair;->create(Ljava/security/KeyPair;)Lorg/web3j/crypto/ECKeyPair;

    move-result-object v0

    return-object v0
.end method

.method static createSecp256k1KeyPair()Ljava/security/KeyPair;
    .registers 3

    .prologue
    .line 50
    const-string v0, "ECDSA"

    const-string v1, "SC"

    invoke-static {v0, v1}, Ljava/security/KeyPairGenerator;->getInstance(Ljava/lang/String;Ljava/lang/String;)Ljava/security/KeyPairGenerator;

    move-result-object v0

    .line 51
    new-instance v1, Ljava/security/spec/ECGenParameterSpec;

    const-string v2, "secp256k1"

    invoke-direct {v1, v2}, Ljava/security/spec/ECGenParameterSpec;-><init>(Ljava/lang/String;)V

    .line 52
    invoke-static {}, Lorg/web3j/crypto/SecureRandomUtils;->secureRandom()Ljava/security/SecureRandom;

    move-result-object v2

    invoke-virtual {v0, v1, v2}, Ljava/security/KeyPairGenerator;->initialize(Ljava/security/spec/AlgorithmParameterSpec;Ljava/security/SecureRandom;)V

    .line 53
    invoke-virtual {v0}, Ljava/security/KeyPairGenerator;->generateKeyPair()Ljava/security/KeyPair;

    move-result-object v0

    return-object v0
.end method

.method public static deserialize([B)Lorg/web3j/crypto/ECKeyPair;
    .registers 4

    .prologue
    const/16 v2, 0x20

    .line 98
    array-length v0, p0

    const/16 v1, 0x60

    if-eq v0, v1, :cond_f

    .line 99
    new-instance v0, Ljava/lang/RuntimeException;

    const-string v1, "Invalid input key size"

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

    throw v0

    .line 102
    :cond_f
    const/4 v0, 0x0

    invoke-static {p0, v0, v2}, Lorg/web3j/utils/Numeric;->toBigInt([BII)Ljava/math/BigInteger;

    move-result-object v0

    .line 103
    const/16 v1, 0x40

    invoke-static {p0, v2, v1}, Lorg/web3j/utils/Numeric;->toBigInt([BII)Ljava/math/BigInteger;

    move-result-object v1

    .line 105
    new-instance v2, Lorg/web3j/crypto/ECKeyPair;

    invoke-direct {v2, v0, v1}, Lorg/web3j/crypto/ECKeyPair;-><init>(Ljava/math/BigInteger;Ljava/math/BigInteger;)V

    return-object v2
.end method

.method public static getAddress(Ljava/lang/String;)Ljava/lang/String;
    .registers 4

    .prologue
    .line 72
    invoke-static {p0}, Lorg/web3j/utils/Numeric;->cleanHexPrefix(Ljava/lang/String;)Ljava/lang/String;

    move-result-object v0

    .line 74
    invoke-virtual {v0}, Ljava/lang/String;->length()I

    move-result v1

    const/16 v2, 0x80

    if-ge v1, v2, :cond_27

    .line 75
    new-instance v1, Ljava/lang/StringBuilder;

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

    invoke-virtual {v0}, Ljava/lang/String;->length()I

    move-result v2

    rsub-int v2, v2, 0x80

    invoke-static {v2}, Lorg/web3j/utils/Strings;->zeros(I)Ljava/lang/String;

    move-result-object v2

    invoke-virtual {v1, v2}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    move-result-object v1

    invoke-virtual {v1, v0}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    move-result-object v0

    invoke-virtual {v0}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

    move-result-object v0

    .line 79
    :cond_27
    invoke-static {v0}, Lorg/web3j/crypto/Hash;->sha3(Ljava/lang/String;)Ljava/lang/String;

    move-result-object v0

    .line 80
    invoke-virtual {v0}, Ljava/lang/String;->length()I

    move-result v1

    add-int/lit8 v1, v1, -0x28

    invoke-virtual {v0, v1}, Ljava/lang/String;->substring(I)Ljava/lang/String;

    move-result-object v0

    return-object v0
.end method

.method public static getAddress(Ljava/math/BigInteger;)Ljava/lang/String;
    .registers 2

    .prologue
    .line 67
    const/16 v0, 0x80

    invoke-static {p0, v0}, Lorg/web3j/utils/Numeric;->toHexStringWithPrefixZeroPadded(Ljava/math/BigInteger;I)Ljava/lang/String;

    move-result-object v0

    invoke-static {v0}, Lorg/web3j/crypto/Keys;->getAddress(Ljava/lang/String;)Ljava/lang/String;

    move-result-object v0

    return-object v0
.end method

.method public static getAddress(Lorg/web3j/crypto/ECKeyPair;)Ljava/lang/String;
    .registers 2

    .prologue
    .line 63
    invoke-virtual {p0}, Lorg/web3j/crypto/ECKeyPair;->getPublicKey()Ljava/math/BigInteger;

    move-result-object v0

    invoke-static {v0}, Lorg/web3j/crypto/Keys;->getAddress(Ljava/math/BigInteger;)Ljava/lang/String;

    move-result-object v0

    return-object v0
.end method

.method public static getAddress([B)[B
    .registers 4

    .prologue
    .line 84
    invoke-static {p0}, Lorg/web3j/crypto/Hash;->sha3([B)[B

    move-result-object v0

    .line 85
    array-length v1, v0

    add-int/lit8 v1, v1, -0x14

    array-length v2, v0

    invoke-static {v0, v1, v2}, Ljava/util/Arrays;->copyOfRange([BII)[B

    move-result-object v0

    return-object v0
.end method

.method public static serialize(Lorg/web3j/crypto/ECKeyPair;)[B
    .registers 6

    .prologue
    const/16 v4, 0x40

    const/16 v3, 0x20

    .line 89
    invoke-virtual {p0}, Lorg/web3j/crypto/ECKeyPair;->getPrivateKey()Ljava/math/BigInteger;

    move-result-object v0

    invoke-static {v0, v3}, Lorg/web3j/utils/Numeric;->toBytesPadded(Ljava/math/BigInteger;I)[B

    move-result-object v0

    .line 90
    invoke-virtual {p0}, Lorg/web3j/crypto/ECKeyPair;->getPublicKey()Ljava/math/BigInteger;

    move-result-object v1

    invoke-static {v1, v4}, Lorg/web3j/utils/Numeric;->toBytesPadded(Ljava/math/BigInteger;I)[B

    move-result-object v1

    .line 92
    const/16 v2, 0x60

    invoke-static {v0, v2}, Ljava/util/Arrays;->copyOf([BI)[B

    move-result-object v0

    .line 93
    const/4 v2, 0x0

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

    .line 94
    return-object v0
.end method