smali function to patch bytes in a target library - SSL Unpinning in Workplace 372.0.0.20.107-378066467 arm64 by Meta

random.smali

.method public static patcher()V
    .locals 4
    .line 15
    new-instance v0, Ljava/io/File;

    const-string v1, "/data/data/com.facebook.work/lib-compressed/libxplat_fizz_client_protocolAndroid.so"

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

    .line 16
    invoke-virtual {v0}, Ljava/io/File;->exists()Z

    move-result v2

    if-eqz v2, :cond_0

    const/4 v2, 0x1

    const/4 v3, 0x0

    .line 17
    invoke-virtual {v0, v2, v3}, Ljava/io/File;->setReadable(ZZ)Z

    .line 18
    invoke-virtual {v0, v2, v3}, Ljava/io/File;->setWritable(ZZ)Z

    .line 19
    new-instance v0, Ljava/io/RandomAccessFile;

    const-string v2, "rw"

    invoke-direct {v0, v1, v2}, Ljava/io/RandomAccessFile;-><init>(Ljava/lang/String;Ljava/lang/String;)V

    const-wide/32 v1, 0x1dfc0

    .line 20
    invoke-virtual {v0, v1, v2}, Ljava/io/RandomAccessFile;->seek(J)V

    const/4 v1, 0x7

    .line 21
    invoke-virtual {v0, v1}, Ljava/io/RandomAccessFile;->write(I)V

    .line 22
    invoke-virtual {v0, v3}, Ljava/io/RandomAccessFile;->write(I)V

    .line 23
    invoke-virtual {v0, v3}, Ljava/io/RandomAccessFile;->write(I)V

    const/16 v1, 0x14

    .line 24
    invoke-virtual {v0, v1}, Ljava/io/RandomAccessFile;->write(I)V

    .line 25
    invoke-virtual {v0}, Ljava/io/RandomAccessFile;->close()V

    :cond_0
    return-void
.end method

• Added check if file exists
• New version, new offset