Syncfusion.Compression.Base

Checksum calculator, based on Adler32 algorithm.

Bits offset, used in adler checksum calculation.

Lagrest prime, less than 65535

Count of iteration used in calculated of the adler checksumm.

Updates checksum by calculating checksum of the given buffer and adding it to current value.

Current checksum. Data byte array. Offset in the buffer. Length of data to be used from the stream.

Generates checksum by calculating checksum of the given buffer.

Data byte array. Offset in the buffer. Length of data to be used from the stream.

Reader, that reads stream with compressed data

Mask for compression method to be decoded from 16-bit header.

Mask for compression info to be decoded from 16-bit header.

Mask for check bits to be decoded from 16-bit header.

Mask for dictionary presence to be decoded from 16-bit header.

Mask for compression level to be decoded from 16-bit header.

Maximum size of the data window.

Maximum length of the repeatable block.

End of the block sign.

Minimal length code.

Maximal length code.

Maximal distance code.

Minimum count of repetions.

Bits, that responds for different repetion modes.

Length bases.

Length extended bits count.

Distance bases.

Distance extanded bits count.

Input stream.

Currently calculated checksum, based on Adler32 algorithm.

Currently read 4 bytes.

Count of bits that are in buffer.

Temporary buffer.

32k buffer for unpacked data.

No wrap mode.

Window size, can not be larger than 32k.

Current position in output stream. Current in-block position can be extracted by applying Int16.MaxValue mask.

Data length. Current in-block position can be extracted by applying Int16.MaxValue mask.

Sign of uncompressed data reading.

Size of the block with uncompressed data.

Specifies wheather next block can to be read. Reading can be denied because the header of the last block have been read.

Specifies wheather user can read more data from stream.

Current lengths huffman tree.

Current distances huffman tree.

Specifies wheather checksum has been read.

TODO: place correct comment here

Creates new reader for streams with compressed data.

Resets current checksum to 1.

Updates checksum by calculating checksum of the given buffer and adding it to current value.

Data byte array. Offset in the buffer. Length of data to be used from the stream.

Discards left-most partially used byte.

Reads array of bytes.

Output buffer. Offset in output buffer. Length of the data to be read. Count of bytes actually read to the buffer.

Fill`s empty parts of the buffer.

Reads specified count of bits without adjusting position.

Count of bits to be read. Read value.

Skips specified count of bits.

Count of bits to be skipped.

Reads specified count of bits from stream.

Count of bits to be read. TODO: place correct comment here

TODO: place correct comment here

Reads ZLib header with compression method and flags.

TODO: place correct comment here

Reades dynamic huffman codes from block header.

Literals/Lengths tree. Distances tree.

Reads and decodes block of data.

True if buffer was empty and new data was read, otherwise - False.

Decodes huffman codes.

True if some data was read.

Reads data to buffer.

Output buffer for data. Offset in output data. Length of the data to be read. Count of bytes actually read.

GET count of bits available

Get count of full bytes available.

Compression level.

Pack without compression

Use high speed compression, reduce of data size is low

Something middle between normal and BestSpeed compressions

Use normal compression, middle between speed and size

Pack better but require a little more time

Use best compression, slow enough

Represents the compressed stream writer

Start template of the zlib header.

Memory usage level.

Size of the pending buffer.

Size of the buffer for the huffman encoding.

Length of the literal alphabet(literal+lengths).

Distances alphabet length.

Length of the code-lengths tree.

Code of the symbol, than means the end of the block.

Maximum window size.

Internal compression engine constant

Output stream.

Pending buffer for writing.

Length of the unflushed data.

Bits cache for pending buffer.

Count of bits in pending buffer cache.

If true, no zlib header will be written to the stream.

Current checksum.

Current compression level.

Current tree for literals.

Current tree for distances.

Current tree for code lengths.

Current position in literals and distances buffer.

Recorded literals buffer.

Recorded distances buffer.

Count of the extra bits.

Static array of the literal codes.

Static array of the lengths of the literal codes.

Static array of the distance codes.

Static array of the lengths of the distance codes.

If true, no futher writings can be performed.

Current hash.

Hash m_HashHead.

Previous hashes.

Start of the matched part.

Length of the matched part.

Previous match available.

Start of the data window.

String start in data window.

Lookahead.

Data window.

Maximum chain length.

Maximum distance of the search with "lazy" algotithm.

Nice length of the block.

Good length of the block.

Current compression function.

Current block of the data to be compressed.

Total count of bytes, that were compressed.

Offset in the input buffer, where input starts.

Offset in the input buffer, where input ends.

If true, stream will be closed after the last block.

Initializes statical data for huffman compression.

Initializes compressor and writes ZLib header if needed.

Output stream. If true, ZLib header and checksum will not be written. Compression level. If true, output stream will be closed after the last block has been written.

Initializes compressor and writes ZLib header if needed. Compression level is set to normal.

Output stream. If true, ZLib header and checksum will not be written. If true, output stream will be closed after the last block has been written.

Initializes compressor and writes ZLib header.

Output stream. Compression level. If true, output stream will be closed after the last block has been written.

Initializes compressor and writes ZLib header.

Output stream. If true, output stream will be closed after the last block has been written.

Compresses data and writes it to the stream.

Data to compress offset in data array length of data to compress True - write last compress block in stream, otherwise False

Writes ZLib header to stream.

Fill the window

Slides current window, and data, associated with it.

Updates hash.

Inserts string to the hash.

Searches for the longest match.

Store data without compression.

Compress with a maximum speed.

Compress, using maximum compression level.

CompressData drives actual compression of data

Reset internal state

Calculates length code from length.

Length. Length code.

Calculates distance code from distance.

Distance. Distance code.

Write all trees to pending buffer

Compress current buffer writing data to pending buffer

Flush block to output with no compression

Data to write Index of first byte to write Count of bytes to write True if this is the last block

Flush block to output with compression

Data to flush Index of first byte to flush Count of bytes to flush True if this is the last block

Add literal to buffer.

Value indicating internal buffer is full

Add distance code and length to literal and distance trees

Distance code Length Value indicating if internal buffer is full

write a byte to buffer

value to write

Write a short value to buffer LSB first

value to write

write an integer LSB first

value to write

Write a block of data to buffer

data to write offset of first byte to write number of bytes to write

Align internal buffer on a byte boundary

Write bits to internal buffer

source of bits number of bits to write

Write a short value to internal buffer most significant byte first

value to write

Flushes the pending buffer into the given output array. If the output array is to small, only a partial flush is done.

Flushes fully recorded bytes to buffer array.

Count of bytes, added to buffer.

Convert internal buffer to byte array. Buffer is empty on completion

converted buffer contents contents

Total data processed.

Return true if input is needed

Checks, wheather huffman compression buffer is full.

True if buffer is full.

The number of bits written to the buffer

Indicates if buffer has been flushed

Type of the block.

Data simply stored as is

An option to use Fixed Huffman tree codes

An option to use Dynamically built Huffman codes

Represents the Huffman Tree.

Frequences of the codes.

Codes itself.

Bit counts, needed to encode different codes.

Count of codes with some lengths. Index - length, value - count.

TODO: place correct comment here

Data compressor.

Create a new Huffman tree

Resets all code data in tree.

Writes code to the compressor output stream.

Code to be written.

Checks wheather tree is empty. If tree is not empty, then exception will be raised.

Specifies new arrays of codes and their lengths.

Array of codes. Array of code lengths.

Calculates codes from their frequences.

Build tree with lengths.

Builds tree.

Calculates length of the compressed data.

Count of bits, the data will occupy.

Calculates code frequences.

Tree.

Writes tree to output stream.

Tree to be written.

Length of the tree.

Lengths of codes in tree.

Code frequences.

Huffman tree, used for decompression.

Maximum count of bits.

Build huffman tree.

Huffman tree for encoding and decoding lengths.

huffman tree for encoding and decoding distances.

Generates fixed huffman trees.

Creates huffman tree.

Prepares data for generating huffman tree.

Array of counts of each code length. Numerical values of the smallest code for each code length. Array of code lengths. Calculated tree size. Code.

Generates huffman tree.

Array of counts of each code length. Numerical values of the smallest code for each code length. Precalculated code. Array of code lengths. Calculated size of the tree. Generated tree.

Builds huffman tree from array of code lengths.

Array of code lengths.

Reads and decompresses one symbol.

GET huffman tree for encoding and decoding lengths.

GET huffman tree for encoding and decoding distances.

Utility Class

Bit-indexes for reversing.

Code lengths for the code length alphabet.

Reverses bit.

Implemenation of IFileNamePreprocessor interface that simply removes some string from the name start and converts all \ characters into /.

Preprocesses file name before ZipArchiveItem saving. Used to convert full item path into local one.

Somehow converts full path into name that will be stored in the zip archive.

Name to process. Converted name.

String to remove from the name start.

Initializes new instance of the name preprocessor.

String to remove from the name start.

Somehow converts full path into name that will be stored in the zip archive.

Name to process. Converted name.

Class contains all constants that are required by ZipArchive.

Zip header signature.

Number of bytes in HeaderSignature constant.

Buffer size.

Version needed to extract.

Version made by.

Size of the short value in bytes.

Size of the int value in bytes.

Central header signature.

End of central directory signature.

Initial value for CRC-32 evaluation.

Offset to the size field in the End of central directory record.

Start byte of the Header signature.

Default constructor to prevent users from creating instances of this class.

The kind of compression used for an entry in an archive

The file is stored (no compression).

The file is Shrunk.

The file is Reduced with compression factor 1.

The file is Reduced with compression factor 2.

The file is Reduced with compression factor 3.

The file is Reduced with compression factor 4.

The file is Imploded.

Reserved for Tokenizing compression algorithm.

The file is Deflated.

Enhanced Deflating using Deflate64(tm).

PKWARE Data Compression Library Imploding (old IBM TERSE).

File is compressed using BZIP2 algorithm.

LZMA (EFS).

File is compressed using IBM TERSE (new).

IBM LZ77 z Architecture (PFS).

PPMd version I, Rev 1.

General purpose bit flag.

If this bit is set, the fields crc-32, compressed size and uncompressed size are set to zero in the local header. The correct values are put in the data descriptor immediately following the compressed data. (Note: PKZIP version 2.04g for DOS only recognizes this bit for method 8 compression, newer versions of PKZIP recognize this bit for any compression method.)

Language encoding flag (EFS). If this bit is set, the filename and comment fields for this file must be encoded using UTF-8.

Class used for implementing Advanced Encryption Standard algorithm.

block size in 32-bit words. Always 4 for AES. (128 bits).

key size in 32-bit words. 4, 6, 8. (128, 192, 256 bits).

number of rounds. 10, 12, 14.

the seed key. size will be 4 * keySize .

Substitution box

inverse Substitution box

key schedule array.

Round constants

State matrix

AES key size

Salt value

Message Authentication Code Key

Stored Message Authentication Code

Computed Message Authentication Code

Encryption Key

Password verifier

Password

No of keyBytes

No of saltBytes

Initiates Aes

Initializes a new instance of the Aes class.

Key size. Key bytes

Encipher 16 bit input

16 bit Input Output value

Decipher 16-bit input

SetNbNkNr()

Keysize

Building S-box

Building Inverse S-box

Builds Rotation array

Adds rounf Key

No of Rounds

SubBytes

InvSubBytes

ShiftRows()

InvShiftRows()

MixColumns

InvMixColumns

Key Expansion

Subword

Word resulted word

Rotates word

Input Result

Dump

Dump key.

Dump two by two.

Generates a key for Encryption and Decryption

Generates Message Authentication Code

data used for MAC

Compares two bytes arrays

First byte array Second byte array true if two arrays are same

Set key and salt lengths for AES key

Decrypt the cipherData

Encrypted data Decrypted

Encrypt the plain data

Data needs to be encrypted Encrypted data

Counter Mode Encryption

Encrypted data Decrypted data to get AES encryption Key

Possible key sizes.

128-bit.

192-bit.

256-bit.

Implementation Rfc2898Key generation

Block Number

Rfc Buffer

End Offset

No of Iterations

Salt Value

Start Offset

Password

BlockSize for SHA1 buffer

Inner buffer

Outer buffer

Indicates whether needs hash

Key Value

Buffer

No of hash

State of SHA1

Expanded array

HMAC hash value

SHA1 hash value

Constructor

Password salt value to get key No of iteration used

Constructor

Password salt value to get key No of iteration used

Creates a byte array for input

Input Converted byte array for input

Derives key

key

Generates the byte array based on the given length

Length of the array Byte array

Initializes the RFC to initial state

Updates the m_inner and m_outer arrays

Initializes the key value

Computes hash code for the given data

input data return hash in bytes

Computes hash for the specified region from input for the given offset and copies the data to the output from the given offset

Input array input Offset Length Output array output Offset

Computes hash for the specified region from input for the given offset.

Input array input Offset Length

Clears all value rom arrays

Initializes State values

Computes hash for the given input data from the specified offset and Length

Input start from the input array length needs to be hashed

Computes the final hash code

hash data

Modifies the buffer using SHA

input State array Blocks

Expand the input array using SHA

Input array

Convert the BigEndian to DWORD

Dword array No of digits Input block

Convert Dword to BigEndian

BigEndian array Output array no of digits

Hash value

Contains security Constants

Password Verifier Length of AES Encryption

Message Authentication Code Length of AES Encryption

Password Length of ZipCrypto Encryption

Password verifier value position of ZipCrypto 0 based index

PKZip strong encryption header length

AES compression method

Block size for Rfc2898Key

Password iteration Count for AES

Aes Block Size

AES encryption header constants

ZipCrypto Encryption and Decryption

Data stream

Password

Crc value

Initial keys

ZipCrc32

Constructor initializes Data stream and password

Data Password

Initializes Password and Crc value

Password Crc value

Initializes key and crc

Update password

Password

Update key values

byte needed for key update

Initializes the keys using Password

Password of the zip file

Key Update using password

Password of the zip file

Data Encryption

Plain data Cipher data

Data Decryption

Cipher data Plain data

Decrypt the data using ZipCrypto

Cipher data Plain data

Encrypt the data using ZipCrypto

Plain data Cipher data

Generates the Encryption and Decryption Byte

byte value

Encryption types.

No Encryption

AES-128 bit encryption

AES-192 bit encryption

AES-256 bit encryption

ZipCrypto Encryption

Represents zip archive.

Collection of archive items.

Dictionary that allows quick search operations by item name. Key - item name, Value - corresponding ZipArchiveItem.

File name preprocessor - object that converts full file/folder name into value that will be written into zip archive.

Indicates whether we should check Crc value when reading item's data. Check is performed when user gets access to decompressed data for the first time.

Default compression level.

Compresses files using custom NetCompressor.

Password for the zip File

Type of the Encryption

Creates compressor.

Searches for integer value from the end of the stream.

Stream to search value in. Value to locate. Maximum number of bytes to scan. Offset to the value, or -1 if it wasn't found.

Extracts Int32 value from the stream.

Stream to read data from. Extracted value.

Extracts Int16 value from the stream.

Stream to read data from. Extracted value.

Extracts unsigned Int16 value from the stream.

Stream to read data from. Extracted value.

Adds empty directory to the archive.

Directory path. Item that has been added.

Adds specified file to the archive.

File to add. Item that has been added.

Adds new item to the archive

Item name to add. Items data stream (can be null for empty files or folders). Indicates whether ZipArchive is responsible for stream closing. File attributes. Item that has been added.

Adds existing item to the archive.

Item to add. Added item.

Removes item from the archive.

Item name to remove.

Removes item at the specified position.

Item index to remove.

Removes items that matches specified regular expression from the collection.

Regular expression used to decide whether to remove item or not.

Updates item inside existing archive.

Item name to update. New data for the item. Indicates whether item should control its stream after update.

Updates existing item or creates new one.

Item to update or create. New data for the item. Indicates whether item should control its stream after update. File attributes for the item. This argument is only used if item is created.

Updates item inside existing archive.

Item name to update. New data for the item.

Saves archive into specified file.

Output file name.

Saves archive into specified file.

Output file name. Indicates whether we should create full path to the file if it doesn't exist.

Saves archive into specified stream.

Output stream. Indicates whether method should close stream after saving.

Reads archive data from the file.

Filename to read.

Reads archive data from the stream. In the current implementation stream must be seekable and readable to extract data.

Stream to read data from. Indicates whether method should close stream after reading.

Clears all internal data.

Searches for the item with specified name.

Item to find. Zero-based item index if found; -1 otherwise.

Searches for the item with specified name.

Regular expression that defines item to find. Zero-based item index if found; -1 otherwise.

Writes central directory to the stream.

Stream to write data into.

Writes End of central directory record into stream.

Stream to write data into. Offset to the central directory start.

Read central directory record from the stream.

Stream to read from.

Extracts items' data from the stream.

Stream to read data from.

Creates a copy of the current instance.

A copy of the current instance.

Protects the archived file with password using specified algorithm.

Password to protect. Type of encryption algorithm to be used.

Removes password from the compressed file.

Opens an encrypted zip file with password.

File Name. Password of the file to open.

Reads archive data from the stream. In the current implementation stream must be seekable and readable to extract data.

Stream to read data from. Indicates whether method should close stream after reading. Password for the file to open.

A method to release allocated unmanaged resources.

Class finilizer.

Returns single archive item from the collection. Read-only.

Zero-based index of the item to return. Single archive item from the collection.

Returns item by its name. Null if item wasn't found. Read-only.

Returns number of items inside archive. Read-only.

Returns the items inside archive. Read-only.

Gets / sets file name preprocessor - object that converts full file/folder name into value that will be written into zip archive.

Gets / sets default compression level - compression level for new items. By default is equal to CompressionLevel.Best.

Indicates whether we should check Crc value when reading item's data. Check is performed when user gets access to item's decompressed data for the first time.

Uses custom compressed stream reader and writer.

Returns the encryption algorithm used. Default value is NONE.

Password for ZipFile

Represents single item inside zip archive. It can be either folder or file.

Name of the archive item.

Compression method.

Compression level.

Crc.

Stream with item's data.

Compressed data size.

Original (not compressed) data size.

Indicates whether this item controls it's data stream.

Indicates whether internal stream contains compressed data.

Position of the size block inside local file header.

Offset to the local header.

General purpose bit flag.

Item's external attributes.

Indicates whether we should check crc value after decompressing item's data.

Actual compression when Aes Encryption

Default constructor.

Creates new instance of the zip item.

Name of the item (can be relative or absolute path). Stream data. Indicates whether item controls stream and must close it when item finish its work.

Updates internal data stream.

New stream to set. Indicates whether item should conrol new stream.

This method saves item inside stream.

Stream to save item into.

Frees all internal resources and closes internal stream if necessary.

This method writes file header into Central directory record.

Stream to write data into.

Converts current datetime to Windows format.

Current Date and time. Value in Windows format.

Read data from the stream based on the central directory.

Stream to read data from, stream.Position must point at just after correct file header.

Reads zipped data from the stream.

Stream to read data from. Indicates whether we should check crc value after data decompression.

Extracts compressed data from the stream.

Stream to read data from.

Extracts local header from the stream.

Stream to read data from.

Decompressed internal data if necessary.

Writes local file header.

Stream to write into.

Writes zipped content inside stream.

Stream to write into.

Writes local file footer into stream.

Stream to write into.

Checks whether Crc field and stream data corresponds each other.

Creates copy of the stream.

Stream to copy. Created stream.

Checks for Latin characters in the Unicode string.

Input Unicode string. True if the Unicode string contain Latin characters. False otherwise.

A method to release allocated unmanaged resources.

Finilizer.

Writes the header to Indicate the zip the file is encrypted.

The data to write

Data Encryption

Data to be Encrypted Encrypted data

Data Decryption

Data needs to be decrypted Decrypted data

Checks whether the file has unicode characters.

Name of the file.

Create a Random byte Array

Length of the salt value salt value

Name of the archive item.

Compression method.

Gets/sets item's compression level.

Crc.

Stream with item's data.

Compressed data size.

Original (not compressed) data size.

Indicates whether this item controls it's data stream.

Indicates whether internal stream contains compressed data.

Gets / sets item's external attributes.

Gets current OEM code page.

Crc32 implementation used in zip archive to verify data correctness.

Special pre-evaluated table used for faster crc evaluation. Evaluated when crcNumber was 0xEDB88320. EvaluateTable method can be used to evaluated table with different constant.

Computes crc-32 value for the buffer.

Buffer to compute crc-32 for. Offset to the data start. Data length in bytes. Initial crc-32 value. Updated crc-32 value.

Computes crc-32 value for the stream.

Stream to compute crc-32 for. Data length in bytes. Crc-32 value.

Evaluates crc table.

"Magic" number. Create table.

Computes crc value for given number

Number to calculate Crc value Initial crc-32 value Crc value

This class represents exception type that is mostly raised when some problems with zip extraction/creation occurs.

Initializes new instance of the exception class.

Exception message.

Initializes new instance of the stream.

Clears all buffers for this stream and causes any buffered data to be written to the underlying device.

Reads a sequence of bytes from the current stream and advances the position within the stream by the number of bytes read.

An array of bytes. When this method returns, the buffer contains the specified byte array with the values between offset and (offset + count - 1) replaced by the bytes read from the current source. The zero-based byte offset in buffer at which to begin storing the data read from the current stream. The maximum number of bytes to be read from the current stream. The total number of bytes read into the buffer. This can be less than the number of bytes requested if that many bytes are not currently available, or zero (0) if the end of the stream has been reached.

Sets the position within the current stream.

A byte offset relative to the origin parameter. A value of type SeekOrigin indicating the reference point used to obtain the new position. The new position within the current stream.

Sets the length of the current stream.

The desired length of the current stream in bytes.

Writes a sequence of bytes to the current stream and advances the current position within this stream by the number of bytes written.

An array of bytes. This method copies count bytes from buffer to the current stream. The zero-based byte offset in buffer at which to begin copying bytes to the current stream. The number of bytes to be written to the current stream.

Gets a value indicating whether the current stream supports reading. Read-only.

Gets a value indicating whether the current stream supports seeking. Read-only.

Gets a value indicating whether the current stream supports writing. Read-only.

Gets the length in bytes of the stream. Read-only.

Gets or sets the position within the current stream. Read-only.

This property returns stream with zipped content. It closes internal deflate stream, so you won't be able to write anything in int. Read-only.

Returns computed crc32 value. Read-only.

Returns size of the unzipped data. Read-only.