hash.smali

.class public Lbr/gov/fazenda/receita/rfb/util/Hash;
.super Ljava/lang/Object;
.source "Hash.java"


# static fields
.field private static final ALGORITIMO_HASH:Ljava/lang/String;


# direct methods
.method static constructor <clinit>()V
    .locals 2

    .prologue
    .line 23
    new-instance v0, Lbr/gov/fazenda/receita/rfb/util/ObfuscatedString;

    const/4 v1, 0x2

    new-array v1, v1, [J

    fill-array-data v1, :array_0

    invoke-direct {v0, v1}, Lbr/gov/fazenda/receita/rfb/util/ObfuscatedString;-><init>([J)V

    .line 24
    invoke-virtual {v0}, Lbr/gov/fazenda/receita/rfb/util/ObfuscatedString;->toString()Ljava/lang/String;

    move-result-object v0

    sput-object v0, Lbr/gov/fazenda/receita/rfb/util/Hash;->ALGORITIMO_HASH:Ljava/lang/String;

    .line 23
    return-void

    :array_0
    .array-data 8
        -0x33c7a6a3d153e9f3L    # -1.528415446109808E59
        0x6617344f7585217cL    # 6.162352608672665E183
    .end array-data
.end method

.method public constructor <init>()V
    .locals 0

    .prologue
    .line 19
    invoke-direct {p0}, Ljava/lang/Object;-><init>()V

    return-void
.end method

.method public static decrypt([B[BLjava/lang/String;)[B
    .locals 4
    .param p0, "raw"    # [B
    .param p1, "encrypted"    # [B
    .param p2, "algoritmo"    # Ljava/lang/String;
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

    .prologue
    .line 85
    new-instance v2, Ljavax/crypto/spec/SecretKeySpec;

    invoke-direct {v2, p0, p2}, Ljavax/crypto/spec/SecretKeySpec;-><init>([BLjava/lang/String;)V

    .line 86
    .local v2, "skeySpec":Ljavax/crypto/spec/SecretKeySpec;
    invoke-static {p2}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;

    move-result-object v0

    .line 87
    .local v0, "cipher":Ljavax/crypto/Cipher;
    const/4 v3, 0x2

    invoke-virtual {v0, v3, v2}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;)V

    .line 88
    invoke-virtual {v0, p1}, Ljavax/crypto/Cipher;->doFinal([B)[B

    move-result-object v1

    .line 89
    .local v1, "decrypted":[B
    return-object v1
.end method

.method public static encrypt([B[BLjava/lang/String;)[B
    .locals 4
    .param p0, "raw"    # [B
    .param p1, "clear"    # [B
    .param p2, "algoritmo"    # Ljava/lang/String;
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

    .prologue
    .line 76
    new-instance v2, Ljavax/crypto/spec/SecretKeySpec;

    invoke-direct {v2, p0, p2}, Ljavax/crypto/spec/SecretKeySpec;-><init>([BLjava/lang/String;)V

    .line 77
    .local v2, "skeySpec":Ljavax/crypto/spec/SecretKeySpec;
    invoke-static {p2}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;

    move-result-object v0

    .line 78
    .local v0, "cipher":Ljavax/crypto/Cipher;
    const/4 v3, 0x1

    invoke-virtual {v0, v3, v2}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;)V

    .line 79
    invoke-virtual {v0, p1}, Ljavax/crypto/Cipher;->doFinal([B)[B

    move-result-object v1

    .line 80
    .local v1, "encrypted":[B
    return-object v1
.end method

.method public static generateHash(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
    .locals 7
    .param p0, "key"    # Ljava/lang/String;
    .param p1, "text"    # Ljava/lang/String;

    .prologue
    .line 37
    new-instance v2, Ljavax/crypto/spec/SecretKeySpec;

    invoke-virtual {p0}, Ljava/lang/String;->getBytes()[B

    move-result-object v5

    sget-object v6, Lbr/gov/fazenda/receita/rfb/util/Hash;->ALGORITIMO_HASH:Ljava/lang/String;

    invoke-direct {v2, v5, v6}, Ljavax/crypto/spec/SecretKeySpec;-><init>([BLjava/lang/String;)V

    .line 41
    .local v2, "keySpec":Ljavax/crypto/spec/SecretKeySpec;
    :try_start_0
    sget-object v5, Lbr/gov/fazenda/receita/rfb/util/Hash;->ALGORITIMO_HASH:Ljava/lang/String;

    invoke-static {v5}, Ljavax/crypto/Mac;->getInstance(Ljava/lang/String;)Ljavax/crypto/Mac;

    move-result-object v3

    .line 42
    .local v3, "mac":Ljavax/crypto/Mac;
    invoke-virtual {v3, v2}, Ljavax/crypto/Mac;->init(Ljava/security/Key;)V

    .line 43
    const-string v5, "UTF-8"

    invoke-virtual {p1, v5}, Ljava/lang/String;->getBytes(Ljava/lang/String;)[B

    move-result-object v5

    invoke-virtual {v3, v5}, Ljavax/crypto/Mac;->doFinal([B)[B

    move-result-object v4

    .line 44
    .local v4, "rawMac":[B
    new-instance v5, Lorg/apache/commons/codec/binary/Hex;

    invoke-direct {v5}, Lorg/apache/commons/codec/binary/Hex;-><init>()V

    invoke-virtual {v5, v4}, Lorg/apache/commons/codec/binary/Hex;->encode([B)[B

    move-result-object v1

    .line 45
    .local v1, "hexBytes":[B
    new-instance v5, Ljava/lang/String;

    const-string v6, "ISO-8859-1"

    invoke-direct {v5, v1, v6}, Ljava/lang/String;-><init>([BLjava/lang/String;)V
    :try_end_0
    .catch Ljava/security/NoSuchAlgorithmException; {:try_start_0 .. :try_end_0} :catch_0
    .catch Ljava/security/InvalidKeyException; {:try_start_0 .. :try_end_0} :catch_1
    .catch Ljava/io/UnsupportedEncodingException; {:try_start_0 .. :try_end_0} :catch_2

    .line 54
    .end local v1    # "hexBytes":[B
    .end local v3    # "mac":Ljavax/crypto/Mac;
    .end local v4    # "rawMac":[B
    :goto_0
    return-object v5

    .line 46
    :catch_0
    move-exception v0

    .line 47
    .local v0, "e":Ljava/security/NoSuchAlgorithmException;
    invoke-virtual {v0}, Ljava/security/NoSuchAlgorithmException;->printStackTrace()V

    .line 54
    .end local v0    # "e":Ljava/security/NoSuchAlgorithmException;
    :goto_1
    const/4 v5, 0x0

    goto :goto_0

    .line 48
    :catch_1
    move-exception v0

    .line 49
    .local v0, "e":Ljava/security/InvalidKeyException;
    invoke-virtual {v0}, Ljava/security/InvalidKeyException;->printStackTrace()V

    goto :goto_1

    .line 50
    .end local v0    # "e":Ljava/security/InvalidKeyException;
    :catch_2
    move-exception v0

    .line 51
    .local v0, "e":Ljava/io/UnsupportedEncodingException;
    invoke-virtual {v0}, Ljava/io/UnsupportedEncodingException;->printStackTrace()V

    goto :goto_1
.end method

.method public static keyGen(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)[B
    .locals 5
    .param p0, "key"    # Ljava/lang/String;
    .param p1, "algoritmo"    # Ljava/lang/String;
    .param p2, "secure"    # Ljava/lang/String;
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/security/NoSuchAlgorithmException;
        }
    .end annotation

    .prologue
    .line 65
    invoke-virtual {p0}, Ljava/lang/String;->getBytes()[B

    move-result-object v0

    .line 66
    .local v0, "keyStart":[B
    invoke-static {p1}, Ljavax/crypto/KeyGenerator;->getInstance(Ljava/lang/String;)Ljavax/crypto/KeyGenerator;

    move-result-object v1

    .line 67
    .local v1, "kgen":Ljavax/crypto/KeyGenerator;
    invoke-static {p2}, Ljava/security/SecureRandom;->getInstance(Ljava/lang/String;)Ljava/security/SecureRandom;

    move-result-object v3

    .line 68
    .local v3, "sr":Ljava/security/SecureRandom;
    invoke-virtual {v3, v0}, Ljava/security/SecureRandom;->setSeed([B)V

    .line 69
    const/16 v4, 0x80

    invoke-virtual {v1, v4, v3}, Ljavax/crypto/KeyGenerator;->init(ILjava/security/SecureRandom;)V

    .line 70
    invoke-virtual {v1}, Ljavax/crypto/KeyGenerator;->generateKey()Ljavax/crypto/SecretKey;

    move-result-object v2

    .line 71
    .local v2, "skey":Ljavax/crypto/SecretKey;
    invoke-interface {v2}, Ljavax/crypto/SecretKey;->getEncoded()[B

    move-result-object v4

    return-object v4
.end method

.method public static validateHash(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)Z
    .locals 2
    .param p0, "key"    # Ljava/lang/String;
    .param p1, "text"    # Ljava/lang/String;
    .param p2, "expectedHash"    # Ljava/lang/String;

    .prologue
    .line 59
    invoke-static {p0, p1}, Lbr/gov/fazenda/receita/rfb/util/Hash;->generateHash(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;

    move-result-object v0

    .line 60
    .local v0, "hash":Ljava/lang/String;
    invoke-virtual {p2, v0}, Ljava/lang/String;->equals(Ljava/lang/Object;)Z

    move-result v1

    return v1
.end method