TlsRSAUtils.smali

.class public Lorg/spongycastle/crypto/tls/TlsRSAUtils;
.super Ljava/lang/Object;
.source "TlsRSAUtils.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 generateEncryptedPreMasterSecret(Lorg/spongycastle/crypto/tls/TlsContext;Lorg/spongycastle/crypto/params/RSAKeyParameters;Ljava/io/OutputStream;)[B
    .registers 8

    .prologue
    const/16 v0, 0x30

    const/4 v2, 0x0

    .line 21
    new-array v0, v0, [B

    .line 22
    invoke-interface {p0}, Lorg/spongycastle/crypto/tls/TlsContext;->getSecureRandom()Ljava/security/SecureRandom;

    move-result-object v1

    invoke-virtual {v1, v0}, Ljava/security/SecureRandom;->nextBytes([B)V

    .line 23
    invoke-interface {p0}, Lorg/spongycastle/crypto/tls/TlsContext;->getClientVersion()Lorg/spongycastle/crypto/tls/ProtocolVersion;

    move-result-object v1

    invoke-static {v1, v0, v2}, Lorg/spongycastle/crypto/tls/TlsUtils;->writeVersion(Lorg/spongycastle/crypto/tls/ProtocolVersion;[BI)V

    .line 25
    new-instance v1, Lorg/spongycastle/crypto/encodings/PKCS1Encoding;

    new-instance v2, Lorg/spongycastle/crypto/engines/RSABlindedEngine;

    invoke-direct {v2}, Lorg/spongycastle/crypto/engines/RSABlindedEngine;-><init>()V

    invoke-direct {v1, v2}, Lorg/spongycastle/crypto/encodings/PKCS1Encoding;-><init>(Lorg/spongycastle/crypto/AsymmetricBlockCipher;)V

    .line 26
    const/4 v2, 0x1

    new-instance v3, Lorg/spongycastle/crypto/params/ParametersWithRandom;

    invoke-interface {p0}, Lorg/spongycastle/crypto/tls/TlsContext;->getSecureRandom()Ljava/security/SecureRandom;

    move-result-object v4

    invoke-direct {v3, p1, v4}, Lorg/spongycastle/crypto/params/ParametersWithRandom;-><init>(Lorg/spongycastle/crypto/CipherParameters;Ljava/security/SecureRandom;)V

    invoke-virtual {v1, v2, v3}, Lorg/spongycastle/crypto/encodings/PKCS1Encoding;->init(ZLorg/spongycastle/crypto/CipherParameters;)V

    .line 30
    const/4 v2, 0x0

    const/16 v3, 0x30

    :try_start_2d
    invoke-virtual {v1, v0, v2, v3}, Lorg/spongycastle/crypto/encodings/PKCS1Encoding;->processBlock([BII)[B

    move-result-object v1

    .line 32
    invoke-static {p0}, Lorg/spongycastle/crypto/tls/TlsUtils;->isSSL(Lorg/spongycastle/crypto/tls/TlsContext;)Z

    move-result v2

    if-eqz v2, :cond_3b

    .line 35
    invoke-virtual {p2, v1}, Ljava/io/OutputStream;->write([B)V

    .line 50
    :goto_3a
    return-object v0

    .line 39
    :cond_3b
    invoke-static {v1, p2}, Lorg/spongycastle/crypto/tls/TlsUtils;->writeOpaque16([BLjava/io/OutputStream;)V
    :try_end_3e
    .catch Lorg/spongycastle/crypto/InvalidCipherTextException; {:try_start_2d .. :try_end_3e} :catch_3f

    goto :goto_3a

    .line 42
    :catch_3f
    move-exception v0

    .line 47
    new-instance v1, Lorg/spongycastle/crypto/tls/TlsFatalAlert;

    const/16 v2, 0x50

    invoke-direct {v1, v2, v0}, Lorg/spongycastle/crypto/tls/TlsFatalAlert;-><init>(SLjava/lang/Throwable;)V

    throw v1
.end method

.method public static safeDecryptPreMasterSecret(Lorg/spongycastle/crypto/tls/TlsContext;Lorg/spongycastle/crypto/params/RSAKeyParameters;[B)[B
    .registers 12

    .prologue
    const/16 v8, 0x30

    const/4 v1, 0x0

    .line 59
    invoke-interface {p0}, Lorg/spongycastle/crypto/tls/TlsContext;->getClientVersion()Lorg/spongycastle/crypto/tls/ProtocolVersion;

    move-result-object v2

    .line 68
    new-array v3, v8, [B

    .line 69
    invoke-interface {p0}, Lorg/spongycastle/crypto/tls/TlsContext;->getSecureRandom()Ljava/security/SecureRandom;

    move-result-object v0

    invoke-virtual {v0, v3}, Ljava/security/SecureRandom;->nextBytes([B)V

    .line 71
    invoke-static {v3}, Lorg/spongycastle/util/Arrays;->clone([B)[B

    move-result-object v0

    .line 74
    :try_start_14
    new-instance v4, Lorg/spongycastle/crypto/encodings/PKCS1Encoding;

    new-instance v5, Lorg/spongycastle/crypto/engines/RSABlindedEngine;

    invoke-direct {v5}, Lorg/spongycastle/crypto/engines/RSABlindedEngine;-><init>()V

    invoke-direct {v4, v5, v3}, Lorg/spongycastle/crypto/encodings/PKCS1Encoding;-><init>(Lorg/spongycastle/crypto/AsymmetricBlockCipher;[B)V

    .line 75
    const/4 v5, 0x0

    new-instance v6, Lorg/spongycastle/crypto/params/ParametersWithRandom;

    .line 76
    invoke-interface {p0}, Lorg/spongycastle/crypto/tls/TlsContext;->getSecureRandom()Ljava/security/SecureRandom;

    move-result-object v7

    invoke-direct {v6, p1, v7}, Lorg/spongycastle/crypto/params/ParametersWithRandom;-><init>(Lorg/spongycastle/crypto/CipherParameters;Ljava/security/SecureRandom;)V

    .line 75
    invoke-virtual {v4, v5, v6}, Lorg/spongycastle/crypto/encodings/PKCS1Encoding;->init(ZLorg/spongycastle/crypto/CipherParameters;)V

    .line 78
    const/4 v5, 0x0

    array-length v6, p2

    invoke-virtual {v4, p2, v5, v6}, Lorg/spongycastle/crypto/encodings/PKCS1Encoding;->processBlock([BII)[B
    :try_end_30
    .catch Ljava/lang/Exception; {:try_start_14 .. :try_end_30} :catch_66

    move-result-object v0

    .line 114
    :goto_31
    invoke-virtual {v2}, Lorg/spongycastle/crypto/tls/ProtocolVersion;->getMajorVersion()I

    move-result v4

    aget-byte v5, v0, v1

    and-int/lit16 v5, v5, 0xff

    xor-int/2addr v4, v5

    .line 115
    invoke-virtual {v2}, Lorg/spongycastle/crypto/tls/ProtocolVersion;->getMinorVersion()I

    move-result v2

    const/4 v5, 0x1

    aget-byte v5, v0, v5

    and-int/lit16 v5, v5, 0xff

    xor-int/2addr v2, v5

    or-int/2addr v2, v4

    .line 116
    shr-int/lit8 v4, v2, 0x1

    or-int/2addr v2, v4

    .line 117
    shr-int/lit8 v4, v2, 0x2

    or-int/2addr v2, v4

    .line 118
    shr-int/lit8 v4, v2, 0x4

    or-int/2addr v2, v4

    .line 119
    and-int/lit8 v2, v2, 0x1

    add-int/lit8 v2, v2, -0x1

    xor-int/lit8 v2, v2, -0x1

    .line 124
    :goto_54
    if-ge v1, v8, :cond_65

    .line 126
    aget-byte v4, v0, v1

    xor-int/lit8 v5, v2, -0x1

    and-int/2addr v4, v5

    aget-byte v5, v3, v1

    and-int/2addr v5, v2

    or-int/2addr v4, v5

    int-to-byte v4, v4

    aput-byte v4, v0, v1

    .line 124
    add-int/lit8 v1, v1, 0x1

    goto :goto_54

    .line 129
    :cond_65
    return-object v0

    :catch_66
    move-exception v4

    goto :goto_31
.end method