.class public final Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher; .super Ljava/lang/Object; .source "AesFlushingCipher.java" # instance fields .field private final blockSize:I .field private final cipher:Ljavax/crypto/Cipher; .field private final flushedBlock:[B .field private pendingXorBytes:I .field private final zerosBlock:[B # direct methods .method public constructor (I[BJJ)V .locals 6 .line 1 invoke-direct {p0}, Ljava/lang/Object;->()V :try_start_0 const-string v0, "AES/CTR/NoPadding" .line 2 invoke-static {v0}, Ljavax/crypto/Cipher;->getInstance(Ljava/lang/String;)Ljavax/crypto/Cipher; move-result-object v0 iput-object v0, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->cipher:Ljavax/crypto/Cipher; .line 3 invoke-virtual {v0}, Ljavax/crypto/Cipher;->getBlockSize()I move-result v1 iput v1, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->blockSize:I .line 4 new-array v2, v1, [B iput-object v2, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->zerosBlock:[B .line 5 new-array v2, v1, [B iput-object v2, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->flushedBlock:[B int-to-long v2, v1 .line 6 div-long v2, p5, v2 int-to-long v4, v1 .line 7 rem-long/2addr p5, v4 long-to-int p5, p5 .line 8 new-instance p6, Ljavax/crypto/spec/SecretKeySpec; invoke-virtual {v0}, Ljavax/crypto/Cipher;->getAlgorithm()Ljava/lang/String; move-result-object v1 const-string v4, "/" invoke-virtual {v1, v4}, Ljava/lang/String;->split(Ljava/lang/String;)[Ljava/lang/String; move-result-object v1 const/4 v4, 0x0 aget-object v1, v1, v4 invoke-direct {p6, p2, v1}, Ljavax/crypto/spec/SecretKeySpec;->([BLjava/lang/String;)V new-instance p2, Ljavax/crypto/spec/IvParameterSpec; .line 9 invoke-direct {p0, p3, p4, v2, v3}, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->getInitializationVector(JJ)[B move-result-object p3 invoke-direct {p2, p3}, Ljavax/crypto/spec/IvParameterSpec;->([B)V .line 10 invoke-virtual {v0, p1, p6, p2}, Ljavax/crypto/Cipher;->init(ILjava/security/Key;Ljava/security/spec/AlgorithmParameterSpec;)V if-eqz p5, :cond_0 .line 11 new-array p1, p5, [B invoke-virtual {p0, p1, v4, p5}, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->updateInPlace([BII)V :try_end_0 .catch Ljava/security/NoSuchAlgorithmException; {:try_start_0 .. :try_end_0} :catch_3 .catch Ljavax/crypto/NoSuchPaddingException; {:try_start_0 .. :try_end_0} :catch_2 .catch Ljava/security/InvalidKeyException; {:try_start_0 .. :try_end_0} :catch_1 .catch Ljava/security/InvalidAlgorithmParameterException; {:try_start_0 .. :try_end_0} :catch_0 :cond_0 return-void :catch_0 move-exception p1 goto :goto_0 :catch_1 move-exception p1 goto :goto_0 :catch_2 move-exception p1 goto :goto_0 :catch_3 move-exception p1 .line 12 :goto_0 new-instance p2, Ljava/lang/RuntimeException; invoke-direct {p2, p1}, Ljava/lang/RuntimeException;->(Ljava/lang/Throwable;)V throw p2 .end method .method private getInitializationVector(JJ)[B .locals 1 const/16 v0, 0x10 .line 1 invoke-static {v0}, Ljava/nio/ByteBuffer;->allocate(I)Ljava/nio/ByteBuffer; move-result-object v0 invoke-virtual {v0, p1, p2}, Ljava/nio/ByteBuffer;->putLong(J)Ljava/nio/ByteBuffer; move-result-object p1 invoke-virtual {p1, p3, p4}, Ljava/nio/ByteBuffer;->putLong(J)Ljava/nio/ByteBuffer; move-result-object p1 invoke-virtual {p1}, Ljava/nio/ByteBuffer;->array()[B move-result-object p1 return-object p1 .end method .method private nonFlushingUpdate([BII[BI)I .locals 6 .line 1 :try_start_0 iget-object v0, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->cipher:Ljavax/crypto/Cipher; move-object v1, p1 move v2, p2 move v3, p3 move-object v4, p4 move v5, p5 invoke-virtual/range {v0 .. v5}, Ljavax/crypto/Cipher;->update([BII[BI)I move-result p1 :try_end_0 .catch Ljavax/crypto/ShortBufferException; {:try_start_0 .. :try_end_0} :catch_0 return p1 :catch_0 move-exception p1 .line 2 new-instance p2, Ljava/lang/RuntimeException; invoke-direct {p2, p1}, Ljava/lang/RuntimeException;->(Ljava/lang/Throwable;)V throw p2 .end method # virtual methods .method public update([BII[BI)V .locals 8 move v2, p2 .line 1 :cond_0 iget p2, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->pendingXorBytes:I if-lez p2, :cond_1 .line 2 aget-byte v0, p1, v2 iget-object v1, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->flushedBlock:[B iget v3, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->blockSize:I sub-int/2addr v3, p2 aget-byte v1, v1, v3 xor-int/2addr v0, v1 int-to-byte v0, v0 aput-byte v0, p4, p5 add-int/lit8 p5, p5, 0x1 add-int/lit8 v2, v2, 0x1 add-int/lit8 p2, p2, -0x1 .line 3 iput p2, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->pendingXorBytes:I add-int/lit8 p3, p3, -0x1 if-nez p3, :cond_0 return-void :cond_1 move-object v0, p0 move-object v1, p1 move v3, p3 move-object v4, p4 move v5, p5 .line 4 invoke-direct/range {v0 .. v5}, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->nonFlushingUpdate([BII[BI)I move-result p1 if-ne p3, p1, :cond_2 return-void :cond_2 sub-int/2addr p3, p1 .line 5 iget p2, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->blockSize:I const/4 v0, 0x0 const/4 v1, 0x1 if-ge p3, p2, :cond_3 move p2, v1 goto :goto_0 :cond_3 move p2, v0 :goto_0 invoke-static {p2}, Lcom/google/android/exoplayer2/util/Assertions;->checkState(Z)V add-int/2addr p5, p1 .line 6 iget p1, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->blockSize:I sub-int v5, p1, p3 iput v5, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->pendingXorBytes:I .line 7 iget-object v3, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->zerosBlock:[B const/4 v4, 0x0 iget-object v6, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->flushedBlock:[B const/4 v7, 0x0 move-object v2, p0 invoke-direct/range {v2 .. v7}, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->nonFlushingUpdate([BII[BI)I move-result p1 .line 8 iget p2, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->blockSize:I if-ne p1, p2, :cond_4 goto :goto_1 :cond_4 move v1, v0 :goto_1 invoke-static {v1}, Lcom/google/android/exoplayer2/util/Assertions;->checkState(Z)V :goto_2 if-ge v0, p3, :cond_5 add-int/lit8 p1, p5, 0x1 .line 9 iget-object p2, p0, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->flushedBlock:[B aget-byte p2, p2, v0 aput-byte p2, p4, p5 add-int/lit8 v0, v0, 0x1 move p5, p1 goto :goto_2 :cond_5 return-void .end method .method public updateInPlace([BII)V .locals 6 move-object v0, p0 move-object v1, p1 move v2, p2 move v3, p3 move-object v4, p1 move v5, p2 .line 1 invoke-virtual/range {v0 .. v5}, Lcom/google/android/exoplayer2/upstream/crypto/AesFlushingCipher;->update([BII[BI)V return-void .end method