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