RSAUtil.smali

.class public final Lcom/baidu/android/common/security/RSAUtil;
.super Ljava/lang/Object;


# static fields
.field public static final ALGORITHM_RSA:Ljava/lang/String; = "RSA"

.field public static final BYTE_IN_BITS:I = 0x8

.field public static final PRIVATE_KEY:Ljava/lang/String; = "PrivateKey"

.field public static final PT_MAXLEN_OFFSET:I = 0xb

.field public static final PUBLIC_KEY:Ljava/lang/String; = "PublicKey"


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

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

    return-void
.end method

.method public static decryptByPrivateKey([BLjava/lang/String;)[B
    .registers 5
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

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

    move-result-object v0

    invoke-static {v0}, Lcom/baidu/android/common/security/Base64;->decode([B)[B

    move-result-object v0

    new-instance v1, Ljava/security/spec/PKCS8EncodedKeySpec;

    invoke-direct {v1, v0}, Ljava/security/spec/PKCS8EncodedKeySpec;-><init>([B)V

    const-string v0, "RSA"

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

    move-result-object v0

    invoke-virtual {v0, v1}, Ljava/security/KeyFactory;->generatePrivate(Ljava/security/spec/KeySpec;)Ljava/security/PrivateKey;

    move-result-object v0

    const-string v1, "RSA/ECB/PKCS1Padding"

    invoke-static {v1}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;

    move-result-object v1

    const/4 v2, 0x2

    invoke-virtual {v1, v2, v0}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;)V

    invoke-virtual {v1, p0}, Ljavax/crypto/Cipher;->doFinal([B)[B

    move-result-object v0

    return-object v0
.end method

.method public static decryptByPublicKey([BLjava/lang/String;)[B
    .registers 5
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

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

    move-result-object v0

    invoke-static {v0}, Lcom/baidu/android/common/security/Base64;->decode([B)[B

    move-result-object v0

    new-instance v1, Ljava/security/spec/X509EncodedKeySpec;

    invoke-direct {v1, v0}, Ljava/security/spec/X509EncodedKeySpec;-><init>([B)V

    const-string v0, "RSA"

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

    move-result-object v0

    invoke-virtual {v0, v1}, Ljava/security/KeyFactory;->generatePublic(Ljava/security/spec/KeySpec;)Ljava/security/PublicKey;

    move-result-object v0

    const-string v1, "RSA/ECB/PKCS1Padding"

    invoke-static {v1}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;

    move-result-object v1

    const/4 v2, 0x2

    invoke-virtual {v1, v2, v0}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;)V

    invoke-virtual {v1, p0}, Ljavax/crypto/Cipher;->doFinal([B)[B

    move-result-object v0

    return-object v0
.end method

.method public static decryptLongByPrivateKey([BLjava/lang/String;I)[B
    .registers 11
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

    const/4 v3, 0x0

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

    move-result-object v0

    invoke-static {v0}, Lcom/baidu/android/common/security/Base64;->decode([B)[B

    move-result-object v0

    new-instance v1, Ljava/security/spec/PKCS8EncodedKeySpec;

    invoke-direct {v1, v0}, Ljava/security/spec/PKCS8EncodedKeySpec;-><init>([B)V

    const-string v0, "RSA"

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

    move-result-object v0

    invoke-virtual {v0, v1}, Ljava/security/KeyFactory;->generatePrivate(Ljava/security/spec/KeySpec;)Ljava/security/PrivateKey;

    move-result-object v0

    const-string v1, "RSA/ECB/PKCS1Padding"

    invoke-static {v1}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;

    move-result-object v4

    const/4 v1, 0x2

    invoke-virtual {v4, v1, v0}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;)V

    div-int/lit8 v1, p2, 0x8

    new-instance v5, Ljava/lang/StringBuilder;

    invoke-direct {v5}, Ljava/lang/StringBuilder;-><init>()V

    array-length v6, p0

    move v2, v3

    :goto_2b
    if-ge v2, v6, :cond_46

    sub-int v0, v6, v2

    if-ge v1, v0, :cond_32

    move v0, v1

    :cond_32
    new-array v7, v0, [B

    invoke-static {p0, v2, v7, v3, v0}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    add-int/2addr v0, v2

    new-instance v2, Ljava/lang/String;

    invoke-virtual {v4, v7}, Ljavax/crypto/Cipher;->doFinal([B)[B

    move-result-object v7

    invoke-direct {v2, v7}, Ljava/lang/String;-><init>([B)V

    invoke-virtual {v5, v2}, Ljava/lang/StringBuilder;->append(Ljava/lang/String;)Ljava/lang/StringBuilder;

    move v2, v0

    goto :goto_2b

    :cond_46
    invoke-virtual {v5}, Ljava/lang/StringBuilder;->toString()Ljava/lang/String;

    move-result-object v0

    invoke-virtual {v0}, Ljava/lang/String;->getBytes()[B

    move-result-object v0

    return-object v0
.end method

.method public static encryptByPrivateKey([BLjava/lang/String;)[B
    .registers 5
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

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

    move-result-object v0

    invoke-static {v0}, Lcom/baidu/android/common/security/Base64;->decode([B)[B

    move-result-object v0

    new-instance v1, Ljava/security/spec/PKCS8EncodedKeySpec;

    invoke-direct {v1, v0}, Ljava/security/spec/PKCS8EncodedKeySpec;-><init>([B)V

    const-string v0, "RSA"

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

    move-result-object v0

    invoke-virtual {v0, v1}, Ljava/security/KeyFactory;->generatePrivate(Ljava/security/spec/KeySpec;)Ljava/security/PrivateKey;

    move-result-object v0

    const-string v1, "RSA/ECB/PKCS1Padding"

    invoke-static {v1}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;

    move-result-object v1

    const/4 v2, 0x1

    invoke-virtual {v1, v2, v0}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;)V

    invoke-virtual {v1, p0}, Ljavax/crypto/Cipher;->doFinal([B)[B

    move-result-object v0

    return-object v0
.end method

.method public static encryptByPublicKey([BLjava/lang/String;)[B
    .registers 5
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

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

    move-result-object v0

    invoke-static {v0}, Lcom/baidu/android/common/security/Base64;->decode([B)[B

    move-result-object v0

    new-instance v1, Ljava/security/spec/X509EncodedKeySpec;

    invoke-direct {v1, v0}, Ljava/security/spec/X509EncodedKeySpec;-><init>([B)V

    const-string v0, "RSA"

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

    move-result-object v0

    invoke-virtual {v0, v1}, Ljava/security/KeyFactory;->generatePublic(Ljava/security/spec/KeySpec;)Ljava/security/PublicKey;

    move-result-object v0

    const-string v1, "RSA/ECB/PKCS1Padding"

    invoke-static {v1}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;

    move-result-object v1

    const/4 v2, 0x1

    invoke-virtual {v1, v2, v0}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;)V

    invoke-virtual {v1, p0}, Ljavax/crypto/Cipher;->doFinal([B)[B

    move-result-object v0

    return-object v0
.end method

.method public static encryptLongByPublicKey([BLjava/lang/String;I)[B
    .registers 13
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

    const/4 v3, 0x0

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

    move-result-object v0

    invoke-static {v0}, Lcom/baidu/android/common/security/Base64;->decode([B)[B

    move-result-object v0

    new-instance v1, Ljava/security/spec/X509EncodedKeySpec;

    invoke-direct {v1, v0}, Ljava/security/spec/X509EncodedKeySpec;-><init>([B)V

    const-string v0, "RSA"

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

    move-result-object v0

    invoke-virtual {v0, v1}, Ljava/security/KeyFactory;->generatePublic(Ljava/security/spec/KeySpec;)Ljava/security/PublicKey;

    move-result-object v0

    const-string v1, "RSA/ECB/PKCS1Padding"

    invoke-static {v1}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher;

    move-result-object v5

    const/4 v1, 0x1

    invoke-virtual {v5, v1, v0}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;)V

    div-int/lit8 v6, p2, 0x8

    add-int/lit8 v1, v6, -0xb

    array-length v7, p0

    add-int v0, v7, v1

    add-int/lit8 v0, v0, -0x1

    div-int/2addr v0, v1

    mul-int/2addr v0, v6

    new-array v8, v0, [B

    move v2, v3

    move v4, v3

    :goto_31
    if-ge v4, v7, :cond_49

    sub-int v0, v7, v4

    if-ge v1, v0, :cond_38

    move v0, v1

    :cond_38
    new-array v9, v0, [B

    invoke-static {p0, v4, v9, v3, v0}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    add-int/2addr v4, v0

    invoke-virtual {v5, v9}, Ljavax/crypto/Cipher;->doFinal([B)[B

    move-result-object v0

    invoke-static {v0, v3, v8, v2, v6}, Ljava/lang/System;->arraycopy(Ljava/lang/Object;ILjava/lang/Object;II)V

    add-int v0, v2, v6

    move v2, v0

    goto :goto_31

    :cond_49
    return-object v8
.end method

.method public static generateKey(I)Ljava/util/Map;
    .registers 5
    .annotation system Ldalvik/annotation/Signature;
        value = {
            "(I)",
            "Ljava/util/Map",
            "<",
            "Ljava/lang/String;",
            "Ljava/lang/Object;",
            ">;"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/security/NoSuchAlgorithmException;
        }
    .end annotation

    const-string v0, "RSA"

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

    move-result-object v0

    invoke-virtual {v0, p0}, Ljava/security/KeyPairGenerator;->initialize(I)V

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

    move-result-object v1

    invoke-virtual {v1}, Ljava/security/KeyPair;->getPublic()Ljava/security/PublicKey;

    move-result-object v0

    check-cast v0, Ljava/security/interfaces/RSAPublicKey;

    invoke-virtual {v1}, Ljava/security/KeyPair;->getPrivate()Ljava/security/PrivateKey;

    move-result-object v1

    check-cast v1, Ljava/security/interfaces/RSAPrivateKey;

    new-instance v2, Ljava/util/HashMap;

    const/4 v3, 0x2

    invoke-direct {v2, v3}, Ljava/util/HashMap;-><init>(I)V

    const-string v3, "PublicKey"

    invoke-interface {v2, v3, v0}, Ljava/util/Map;->put(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;

    const-string v0, "PrivateKey"

    invoke-interface {v2, v0, v1}, Ljava/util/Map;->put(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;

    return-object v2
.end method

.method public static generateRSAPrivateKey(Ljava/math/BigInteger;Ljava/math/BigInteger;)Ljava/security/interfaces/RSAPrivateKey;
    .registers 4
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

    :try_start_0
    const-string v0, "RSA"

    invoke-static {v0}, Ljava/security/KeyFactory;->getInstance(Ljava/lang/String;)Ljava/security/KeyFactory;
    :try_end_5
    .catch Ljava/security/NoSuchAlgorithmException; {:try_start_0 .. :try_end_5} :catch_12

    move-result-object v0

    new-instance v1, Ljava/security/spec/RSAPrivateKeySpec;

    invoke-direct {v1, p0, p1}, Ljava/security/spec/RSAPrivateKeySpec;-><init>(Ljava/math/BigInteger;Ljava/math/BigInteger;)V

    :try_start_b
    invoke-virtual {v0, v1}, Ljava/security/KeyFactory;->generatePrivate(Ljava/security/spec/KeySpec;)Ljava/security/PrivateKey;

    move-result-object v0

    check-cast v0, Ljava/security/interfaces/RSAPrivateKey;
    :try_end_11
    .catch Ljava/security/spec/InvalidKeySpecException; {:try_start_b .. :try_end_11} :catch_1d

    return-object v0

    :catch_12
    move-exception v0

    new-instance v1, Ljava/lang/Exception;

    invoke-virtual {v0}, Ljava/security/NoSuchAlgorithmException;->getMessage()Ljava/lang/String;

    move-result-object v0

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

    throw v1

    :catch_1d
    move-exception v0

    new-instance v1, Ljava/lang/Exception;

    invoke-virtual {v0}, Ljava/security/spec/InvalidKeySpecException;->getMessage()Ljava/lang/String;

    move-result-object v0

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

    throw v1
.end method

.method public static generateRSAPublicKey(Ljava/math/BigInteger;Ljava/math/BigInteger;)Ljava/security/interfaces/RSAPublicKey;
    .registers 4
    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

    :try_start_0
    const-string v0, "RSA"

    invoke-static {v0}, Ljava/security/KeyFactory;->getInstance(Ljava/lang/String;)Ljava/security/KeyFactory;
    :try_end_5
    .catch Ljava/security/NoSuchAlgorithmException; {:try_start_0 .. :try_end_5} :catch_12

    move-result-object v0

    new-instance v1, Ljava/security/spec/RSAPublicKeySpec;

    invoke-direct {v1, p0, p1}, Ljava/security/spec/RSAPublicKeySpec;-><init>(Ljava/math/BigInteger;Ljava/math/BigInteger;)V

    :try_start_b
    invoke-virtual {v0, v1}, Ljava/security/KeyFactory;->generatePublic(Ljava/security/spec/KeySpec;)Ljava/security/PublicKey;

    move-result-object v0

    check-cast v0, Ljava/security/interfaces/RSAPublicKey;
    :try_end_11
    .catch Ljava/security/spec/InvalidKeySpecException; {:try_start_b .. :try_end_11} :catch_1d

    return-object v0

    :catch_12
    move-exception v0

    new-instance v1, Ljava/lang/Exception;

    invoke-virtual {v0}, Ljava/security/NoSuchAlgorithmException;->getMessage()Ljava/lang/String;

    move-result-object v0

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

    throw v1

    :catch_1d
    move-exception v0

    new-instance v1, Ljava/lang/Exception;

    invoke-virtual {v0}, Ljava/security/spec/InvalidKeySpecException;->getMessage()Ljava/lang/String;

    move-result-object v0

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

    throw v1
.end method

.method public static getPrivateKey(Ljava/util/Map;)Ljava/lang/String;
    .registers 3
    .annotation system Ldalvik/annotation/Signature;
        value = {
            "(",
            "Ljava/util/Map",
            "<",
            "Ljava/lang/String;",
            "Ljava/lang/Object;",
            ">;)",
            "Ljava/lang/String;"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/lang/Exception;
        }
    .end annotation

    const-string v0, "PrivateKey"

    invoke-interface {p0, v0}, Ljava/util/Map;->get(Ljava/lang/Object;)Ljava/lang/Object;

    move-result-object v0

    check-cast v0, Ljava/security/Key;

    invoke-interface {v0}, Ljava/security/Key;->getEncoded()[B

    move-result-object v0

    const-string v1, "utf-8"

    invoke-static {v0, v1}, Lcom/baidu/android/common/security/Base64;->encode([BLjava/lang/String;)Ljava/lang/String;

    move-result-object v0

    return-object v0
.end method

.method public static getPublicKey(Ljava/util/Map;)Ljava/lang/String;
    .registers 3
    .annotation system Ldalvik/annotation/Signature;
        value = {
            "(",
            "Ljava/util/Map",
            "<",
            "Ljava/lang/String;",
            "Ljava/lang/Object;",
            ">;)",
            "Ljava/lang/String;"
        }
    .end annotation

    .annotation system Ldalvik/annotation/Throws;
        value = {
            Ljava/io/UnsupportedEncodingException;
        }
    .end annotation

    const-string v0, "PublicKey"

    invoke-interface {p0, v0}, Ljava/util/Map;->get(Ljava/lang/Object;)Ljava/lang/Object;

    move-result-object v0

    check-cast v0, Ljava/security/Key;

    invoke-interface {v0}, Ljava/security/Key;->getEncoded()[B

    move-result-object v0

    const-string v1, "utf-8"

    invoke-static {v0, v1}, Lcom/baidu/android/common/security/Base64;->encode([BLjava/lang/String;)Ljava/lang/String;

    move-result-object v0

    return-object v0
.end method