mirror of
https://github.com/ipxe/ipxe
synced 2026-02-14 02:31:26 +03:00
[deflate] Add support for DEFLATE decompression
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
1045
src/crypto/deflate.c
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1045
src/crypto/deflate.c
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File diff suppressed because it is too large
Load Diff
283
src/include/ipxe/deflate.h
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283
src/include/ipxe/deflate.h
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@@ -0,0 +1,283 @@
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#ifndef _IPXE_DEFLATE_H
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#define _IPXE_DEFLATE_H
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/** @file
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*
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* DEFLATE decompression algorithm
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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#include <stdint.h>
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#include <string.h>
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#include <ipxe/uaccess.h>
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/** Compression formats */
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enum deflate_format {
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/** Raw DEFLATE data (no header or footer) */
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DEFLATE_RAW,
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/** ZLIB header and footer */
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DEFLATE_ZLIB,
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};
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/** Block header length (in bits) */
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#define DEFLATE_HEADER_BITS 3
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/** Block header final block flags bit */
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#define DEFLATE_HEADER_BFINAL_BIT 0
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/** Block header type LSB */
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#define DEFLATE_HEADER_BTYPE_LSB 1
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/** Block header type mask */
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#define DEFLATE_HEADER_BTYPE_MASK 0x03
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/** Block header type: literal data */
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#define DEFLATE_HEADER_BTYPE_LITERAL 0
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/** Block header type: static Huffman alphabet */
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#define DEFLATE_HEADER_BTYPE_STATIC 1
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/** Block header type: dynamic Huffman alphabet */
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#define DEFLATE_HEADER_BTYPE_DYNAMIC 2
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/** Literal header LEN/NLEN field length (in bits) */
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#define DEFLATE_LITERAL_LEN_BITS 16
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/** Dynamic header length (in bits) */
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#define DEFLATE_DYNAMIC_BITS 14
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/** Dynamic header HLIT field LSB */
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#define DEFLATE_DYNAMIC_HLIT_LSB 0
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/** Dynamic header HLIT field mask */
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#define DEFLATE_DYNAMIC_HLIT_MASK 0x1f
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/** Dynamic header HDIST field LSB */
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#define DEFLATE_DYNAMIC_HDIST_LSB 5
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/** Dynamic header HDIST field mask */
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#define DEFLATE_DYNAMIC_HDIST_MASK 0x1f
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/** Dynamic header HCLEN field LSB */
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#define DEFLATE_DYNAMIC_HCLEN_LSB 10
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/** Dynamic header HCLEN field mask */
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#define DEFLATE_DYNAMIC_HCLEN_MASK 0x0f
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/** Dynamic header code length length (in bits) */
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#define DEFLATE_CODELEN_BITS 3
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/** Maximum length of a Huffman symbol (in bits) */
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#define DEFLATE_HUFFMAN_BITS 15
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/** Quick lookup length for a Huffman symbol (in bits)
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*
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* This is a policy decision.
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*/
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#define DEFLATE_HUFFMAN_QL_BITS 7
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/** Quick lookup shift */
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#define DEFLATE_HUFFMAN_QL_SHIFT ( 16 - DEFLATE_HUFFMAN_QL_BITS )
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/** Literal/length end of block code */
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#define DEFLATE_LITLEN_END 256
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/** Maximum value of a literal/length code */
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#define DEFLATE_LITLEN_MAX_CODE 287
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/** Maximum value of a distance code */
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#define DEFLATE_DISTANCE_MAX_CODE 31
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/** Maximum value of a code length code */
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#define DEFLATE_CODELEN_MAX_CODE 18
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/** ZLIB header length (in bits) */
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#define ZLIB_HEADER_BITS 16
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/** ZLIB header compression method LSB */
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#define ZLIB_HEADER_CM_LSB 0
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/** ZLIB header compression method mask */
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#define ZLIB_HEADER_CM_MASK 0x0f
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/** ZLIB header compression method: DEFLATE */
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#define ZLIB_HEADER_CM_DEFLATE 8
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/** ZLIB header preset dictionary flag bit */
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#define ZLIB_HEADER_FDICT_BIT 13
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/** ZLIB ADLER32 length (in bits) */
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#define ZLIB_ADLER32_BITS 32
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/** A Huffman-coded set of symbols of a given length */
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struct deflate_huf_symbols {
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/** Length of Huffman-coded symbols */
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uint8_t bits;
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/** Shift to normalise symbols of this length to 16 bits */
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uint8_t shift;
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/** Number of Huffman-coded symbols having this length */
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uint16_t freq;
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/** First symbol of this length (normalised to 16 bits)
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*
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* Stored as a 32-bit value to allow the value 0x10000 to be
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* used for empty sets of symbols longer than the maximum
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* utilised length.
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*/
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uint32_t start;
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/** Raw symbols having this length */
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uint16_t *raw;
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};
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/** A Huffman-coded alphabet */
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struct deflate_alphabet {
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/** Huffman-coded symbol set for each length */
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struct deflate_huf_symbols huf[DEFLATE_HUFFMAN_BITS];
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/** Quick lookup table */
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uint8_t lookup[ 1 << DEFLATE_HUFFMAN_QL_BITS ];
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/** Raw symbols
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*
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* Ordered by Huffman-coded symbol length, then by symbol
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* value. This field has a variable length.
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*/
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uint16_t raw[0];
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};
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/** A static Huffman alphabet length pattern */
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struct deflate_static_length_pattern {
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/** Length pair */
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uint8_t fill;
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/** Repetition count */
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uint8_t count;
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} __attribute__ (( packed ));
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/** Decompressor */
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struct deflate {
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/** Resume point
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*
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* Used as the target of a computed goto to jump to the
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* appropriate point within the state machine.
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*/
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void *resume;
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/** Format */
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enum deflate_format format;
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/** Accumulator */
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uint32_t accumulator;
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/** Bit-reversed accumulator
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*
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* Don't ask.
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*/
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uint32_t rotalumucca;
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/** Number of bits within the accumulator */
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unsigned int bits;
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/** Current block header */
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unsigned int header;
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/** Remaining length of data (e.g. within a literal block) */
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size_t remaining;
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/** Current length index within a set of code lengths */
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unsigned int length_index;
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/** Target length index within a set of code lengths */
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unsigned int length_target;
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/** Current length within a set of code lengths */
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unsigned int length;
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/** Number of extra bits required */
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unsigned int extra_bits;
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/** Length of a duplicated string */
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size_t dup_len;
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/** Distance of a duplicated string */
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size_t dup_distance;
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/** Literal/length Huffman alphabet */
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struct deflate_alphabet litlen;
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/** Literal/length raw symbols
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*
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* Must immediately follow the literal/length Huffman alphabet.
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*/
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uint16_t litlen_raw[ DEFLATE_LITLEN_MAX_CODE + 1 ];
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/** Number of symbols in the literal/length Huffman alphabet */
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unsigned int litlen_count;
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/** Distance and code length Huffman alphabet
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*
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* The code length Huffman alphabet has a maximum Huffman
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* symbol length of 7 and a maximum code value of 18, and is
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* thus strictly smaller than the distance Huffman alphabet.
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* Since we never need both alphabets simultaneously, we can
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* reuse the storage space for the distance alphabet to
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* temporarily hold the code length alphabet.
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*/
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struct deflate_alphabet distance_codelen;
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/** Distance and code length raw symbols
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*
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* Must immediately follow the distance and code length
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* Huffman alphabet.
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*/
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uint16_t distance_codelen_raw[ DEFLATE_DISTANCE_MAX_CODE + 1 ];
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/** Number of symbols in the distance Huffman alphabet */
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unsigned int distance_count;
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/** Huffman code lengths
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*
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* The literal/length and distance code lengths are
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* constructed as a single set of lengths.
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*
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* The code length Huffman alphabet has a maximum code value
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* of 18 and the set of lengths is thus strictly smaller than
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* the combined literal/length and distance set of lengths.
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* Since we never need both alphabets simultaneously, we can
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* reuse the storage space for the literal/length and distance
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* code lengths to temporarily hold the code length code
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* lengths.
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*/
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uint8_t lengths[ ( ( DEFLATE_LITLEN_MAX_CODE + 1 ) +
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( DEFLATE_DISTANCE_MAX_CODE + 1 ) +
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1 /* round up */ ) / 2 ];
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};
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/** A chunk of data */
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struct deflate_chunk {
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/** Data */
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userptr_t data;
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/** Current offset */
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size_t offset;
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/** Length of data */
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size_t len;
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};
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/**
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* Initialise chunk of data
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*
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* @v chunk Chunk of data to initialise
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* @v data Data
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* @v offset Starting offset
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* @v len Length
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*/
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static inline __attribute__ (( always_inline )) void
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deflate_chunk_init ( struct deflate_chunk *chunk, userptr_t data,
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size_t offset, size_t len ) {
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chunk->data = data;
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chunk->offset = offset;
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chunk->len = len;
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}
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/**
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* Check if decompression has finished
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*
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* @v deflate Decompressor
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* @ret finished Decompression has finished
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*/
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static inline int deflate_finished ( struct deflate *deflate ) {
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return ( deflate->resume == NULL );
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}
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extern void deflate_init ( struct deflate *deflate,
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enum deflate_format format );
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extern int deflate_inflate ( struct deflate *deflate,
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struct deflate_chunk *in,
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struct deflate_chunk *out );
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#endif /* _IPXE_DEFLATE_H */
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@@ -297,6 +297,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
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#define ERRFILE_efi_reboot ( ERRFILE_OTHER | 0x003e0000 )
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#define ERRFILE_efi_reboot ( ERRFILE_OTHER | 0x003e0000 )
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#define ERRFILE_memmap_settings ( ERRFILE_OTHER | 0x003f0000 )
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#define ERRFILE_memmap_settings ( ERRFILE_OTHER | 0x003f0000 )
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#define ERRFILE_param_cmd ( ERRFILE_OTHER | 0x00400000 )
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#define ERRFILE_param_cmd ( ERRFILE_OTHER | 0x00400000 )
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#define ERRFILE_deflate ( ERRFILE_OTHER | 0x00410000 )
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/** @} */
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/** @} */
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239
src/tests/deflate_test.c
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239
src/tests/deflate_test.c
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@@ -0,0 +1,239 @@
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/*
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* Copyright (C) 2014 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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/** @file
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*
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* DEFLATE tests
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*
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*/
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/* Forcibly enable assertions */
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#undef NDEBUG
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ipxe/deflate.h>
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#include <ipxe/test.h>
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/** A DEFLATE test */
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struct deflate_test {
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/** Compression format */
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enum deflate_format format;
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/** Compressed data */
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const void *compressed;
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/** Length of compressed data */
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size_t compressed_len;
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/** Expected uncompressed data */
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const void *expected;
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/** Length of expected uncompressed data */
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size_t expected_len;
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};
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/** A DEFLATE fragment list */
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struct deflate_test_fragments {
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/** Fragment lengths */
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size_t len[8];
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};
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/** Define inline data */
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#define DATA(...) { __VA_ARGS__ }
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/** Define a DEFLATE test */
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#define DEFLATE( name, FORMAT, COMPRESSED, EXPECTED ) \
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static const uint8_t name ## _compressed[] = COMPRESSED; \
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static const uint8_t name ## _expected[] = EXPECTED; \
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static struct deflate_test name = { \
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.format = FORMAT, \
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.compressed = name ## _compressed, \
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.compressed_len = sizeof ( name ## _compressed ), \
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.expected = name ## _expected, \
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.expected_len = sizeof ( name ## _expected ), \
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};
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/* Empty file, no compression */
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DEFLATE ( empty_literal, DEFLATE_RAW,
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DATA ( 0x01, 0x00, 0x00, 0xff, 0xff ), DATA() );
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/* "iPXE" string, no compression */
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DEFLATE ( literal, DEFLATE_RAW,
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DATA ( 0x01, 0x04, 0x00, 0xfb, 0xff, 0x69, 0x50, 0x58, 0x45 ),
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DATA ( 0x69, 0x50, 0x58, 0x45 ) );
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/* Empty file */
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DEFLATE ( empty, DEFLATE_RAW, DATA ( 0x03, 0x00 ), DATA() );
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/* "Hello world" */
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DEFLATE ( hello_world, DEFLATE_RAW,
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DATA ( 0xf3, 0x48, 0xcd, 0xc9, 0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca,
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0x49, 0x01, 0x00 ),
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DATA ( 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x77, 0x6f, 0x72, 0x6c,
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0x64 ) );
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/* "Hello hello world" */
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DEFLATE ( hello_hello_world, DEFLATE_RAW,
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DATA ( 0xf3, 0x48, 0xcd, 0xc9, 0xc9, 0x57, 0xc8, 0x00, 0x93, 0xe5,
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0xf9, 0x45, 0x39, 0x29, 0x00 ),
|
||||||
|
DATA ( 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x68, 0x65, 0x6c, 0x6c,
|
||||||
|
0x6f, 0x20, 0x77, 0x6f, 0x72, 0x6c, 0x64 ) );
|
||||||
|
|
||||||
|
/* "This specification defines a lossless compressed data format" */
|
||||||
|
DEFLATE ( rfc_sentence, DEFLATE_RAW,
|
||||||
|
DATA ( 0x0d, 0xc6, 0xdb, 0x09, 0x00, 0x21, 0x0c, 0x04, 0xc0, 0x56,
|
||||||
|
0xb6, 0x28, 0x1b, 0x08, 0x79, 0x70, 0x01, 0x35, 0xe2, 0xa6,
|
||||||
|
0x7f, 0xce, 0xf9, 0x9a, 0xf1, 0x25, 0xc1, 0xe3, 0x9a, 0x91,
|
||||||
|
0x2a, 0x9d, 0xb5, 0x61, 0x1e, 0xb9, 0x9d, 0x10, 0xcc, 0x22,
|
||||||
|
0xa7, 0x93, 0xd0, 0x5a, 0xe7, 0xbe, 0xb8, 0xc1, 0xa4, 0x05,
|
||||||
|
0x51, 0x77, 0x49, 0xff ),
|
||||||
|
DATA ( 0x54, 0x68, 0x69, 0x73, 0x20, 0x73, 0x70, 0x65, 0x63, 0x69,
|
||||||
|
0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x64,
|
||||||
|
0x65, 0x66, 0x69, 0x6e, 0x65, 0x73, 0x20, 0x61, 0x20, 0x6c,
|
||||||
|
0x6f, 0x73, 0x73, 0x6c, 0x65, 0x73, 0x73, 0x20, 0x63, 0x6f,
|
||||||
|
0x6d, 0x70, 0x72, 0x65, 0x73, 0x73, 0x65, 0x64, 0x20, 0x64,
|
||||||
|
0x61, 0x74, 0x61, 0x20, 0x66, 0x6f, 0x72, 0x6d, 0x61, 0x74 ) );
|
||||||
|
|
||||||
|
/* "ZLIB Compressed Data Format Specification" */
|
||||||
|
DEFLATE ( zlib, DEFLATE_ZLIB,
|
||||||
|
DATA ( 0x78, 0x01, 0x8b, 0xf2, 0xf1, 0x74, 0x52, 0x70, 0xce, 0xcf,
|
||||||
|
0x2d, 0x28, 0x4a, 0x2d, 0x2e, 0x4e, 0x4d, 0x51, 0x70, 0x49,
|
||||||
|
0x2c, 0x49, 0x54, 0x70, 0xcb, 0x2f, 0xca, 0x4d, 0x2c, 0x51,
|
||||||
|
0x08, 0x2e, 0x48, 0x4d, 0xce, 0x4c, 0xcb, 0x4c, 0x4e, 0x2c,
|
||||||
|
0xc9, 0xcc, 0xcf, 0x03, 0x00, 0x2c, 0x0e, 0x0e, 0xeb ),
|
||||||
|
DATA ( 0x5a, 0x4c, 0x49, 0x42, 0x20, 0x43, 0x6f, 0x6d, 0x70, 0x72,
|
||||||
|
0x65, 0x73, 0x73, 0x65, 0x64, 0x20, 0x44, 0x61, 0x74, 0x61,
|
||||||
|
0x20, 0x46, 0x6f, 0x72, 0x6d, 0x61, 0x74, 0x20, 0x53, 0x70,
|
||||||
|
0x65, 0x63, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f,
|
||||||
|
0x6e ) );
|
||||||
|
|
||||||
|
/* "ZLIB Compressed Data Format Specification" fragment list */
|
||||||
|
static struct deflate_test_fragments zlib_fragments[] = {
|
||||||
|
{ { -1UL, } },
|
||||||
|
{ { 0, 1, 5, -1UL, } },
|
||||||
|
{ { 0, 0, 1, 0, 0, 1, -1UL } },
|
||||||
|
{ { 10, 8, 4, 7, 11, -1UL } },
|
||||||
|
{ { 45, -1UL } },
|
||||||
|
{ { 48, -1UL } },
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Report DEFLATE test result
|
||||||
|
*
|
||||||
|
* @v deflate Decompressor
|
||||||
|
* @v test Deflate test
|
||||||
|
* @v frags Fragment list, or NULL
|
||||||
|
* @v file Test code file
|
||||||
|
* @v line Test code line
|
||||||
|
*/
|
||||||
|
static void deflate_okx ( struct deflate *deflate,
|
||||||
|
struct deflate_test *test,
|
||||||
|
struct deflate_test_fragments *frags,
|
||||||
|
const char *file, unsigned int line ) {
|
||||||
|
uint8_t data[ test->expected_len ];
|
||||||
|
struct deflate_chunk in;
|
||||||
|
struct deflate_chunk out;
|
||||||
|
size_t frag_len = -1UL;
|
||||||
|
size_t offset = 0;
|
||||||
|
size_t remaining = test->compressed_len;
|
||||||
|
unsigned int i;
|
||||||
|
|
||||||
|
/* Initialise decompressor */
|
||||||
|
deflate_init ( deflate, test->format );
|
||||||
|
|
||||||
|
/* Initialise output chunk */
|
||||||
|
deflate_chunk_init ( &out, virt_to_user ( data ), 0, sizeof ( data ) );
|
||||||
|
|
||||||
|
/* Process input (in fragments, if applicable) */
|
||||||
|
for ( i = 0 ; i < ( sizeof ( frags->len ) /
|
||||||
|
sizeof ( frags->len[0] ) ) ; i++ ) {
|
||||||
|
|
||||||
|
/* Initialise input chunk */
|
||||||
|
if ( frags )
|
||||||
|
frag_len = frags->len[i];
|
||||||
|
if ( frag_len > remaining )
|
||||||
|
frag_len = remaining;
|
||||||
|
deflate_chunk_init ( &in, virt_to_user ( test->compressed ),
|
||||||
|
offset, ( offset + frag_len ) );
|
||||||
|
|
||||||
|
/* Decompress this fragment */
|
||||||
|
okx ( deflate_inflate ( deflate, &in, &out ) == 0, file, line );
|
||||||
|
okx ( in.len == ( offset + frag_len ), file, line );
|
||||||
|
okx ( in.offset == in.len, file, line );
|
||||||
|
|
||||||
|
/* Move to next fragment */
|
||||||
|
offset = in.offset;
|
||||||
|
remaining -= frag_len;
|
||||||
|
if ( ! remaining )
|
||||||
|
break;
|
||||||
|
|
||||||
|
/* Check that decompression has not terminated early */
|
||||||
|
okx ( ! deflate_finished ( deflate ), file, line );
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Check decompression has terminated as expected */
|
||||||
|
okx ( deflate_finished ( deflate ), file, line );
|
||||||
|
okx ( offset == test->compressed_len, file, line );
|
||||||
|
okx ( out.offset == test->expected_len, file, line );
|
||||||
|
okx ( memcmp ( data, test->expected, test->expected_len ) == 0,
|
||||||
|
file, line );
|
||||||
|
}
|
||||||
|
#define deflate_ok( deflate, test, frags ) \
|
||||||
|
deflate_okx ( deflate, test, frags, __FILE__, __LINE__ )
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Perform DEFLATE self-test
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
static void deflate_test_exec ( void ) {
|
||||||
|
struct deflate *deflate;
|
||||||
|
unsigned int i;
|
||||||
|
|
||||||
|
/* Allocate shared structure */
|
||||||
|
deflate = malloc ( sizeof ( *deflate ) );
|
||||||
|
ok ( deflate != NULL );
|
||||||
|
|
||||||
|
/* Perform self-tests */
|
||||||
|
if ( deflate ) {
|
||||||
|
|
||||||
|
/* Test as a single pass */
|
||||||
|
deflate_ok ( deflate, &empty_literal, NULL );
|
||||||
|
deflate_ok ( deflate, &literal, NULL );
|
||||||
|
deflate_ok ( deflate, &empty, NULL );
|
||||||
|
deflate_ok ( deflate, &hello_world, NULL );
|
||||||
|
deflate_ok ( deflate, &hello_hello_world, NULL );
|
||||||
|
deflate_ok ( deflate, &rfc_sentence, NULL );
|
||||||
|
deflate_ok ( deflate, &zlib, NULL );
|
||||||
|
|
||||||
|
/* Test fragmentation */
|
||||||
|
for ( i = 0 ; i < ( sizeof ( zlib_fragments ) /
|
||||||
|
sizeof ( zlib_fragments[0] ) ) ; i++ ) {
|
||||||
|
deflate_ok ( deflate, &zlib, &zlib_fragments[i] );
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Free shared structure */
|
||||||
|
free ( deflate );
|
||||||
|
}
|
||||||
|
|
||||||
|
/** DEFLATE self-test */
|
||||||
|
struct self_test deflate_test __self_test = {
|
||||||
|
.name = "deflate",
|
||||||
|
.exec = deflate_test_exec,
|
||||||
|
};
|
||||||
@@ -50,3 +50,4 @@ REQUIRE_OBJECT ( x509_test );
|
|||||||
REQUIRE_OBJECT ( ocsp_test );
|
REQUIRE_OBJECT ( ocsp_test );
|
||||||
REQUIRE_OBJECT ( cms_test );
|
REQUIRE_OBJECT ( cms_test );
|
||||||
REQUIRE_OBJECT ( pnm_test );
|
REQUIRE_OBJECT ( pnm_test );
|
||||||
|
REQUIRE_OBJECT ( deflate_test );
|
||||||
|
|||||||
Reference in New Issue
Block a user