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v1.1.6 Latest Latest
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 Go to latest Published: Dec 21, 2020 License: GPL-3.0, GPL-3.0-only Imports: 22 Imported by: 0

Documentation

Index

Constants

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const (
	KEYWORD_XREF           = Keyword("xref")
	KEYWORD_TRAILER        = Keyword("trailer")
	KEYWORD_OBJ            = Keyword("obj")
	KEYWORD_STREAM         = Keyword("stream")
	KEYWORD_R              = Keyword("R")
	KEYWORD_N              = Keyword("n")
	KEYWORD_NULL           = Keyword("null")
	KEYWORD_TRUE           = Keyword("true")
	KEYWORD_FALSE          = Keyword("false")
	KEYWORD_TEXT           = Keyword("BT")
	KEYWORD_TEXT_END       = Keyword("ET")
	KEYWORD_TEXT_FONT      = Keyword("Tf")
	KEYWORD_TEXT_MOVE_1    = Keyword("T*")
	KEYWORD_TEXT_MOVE_2    = Keyword("Td")
	KEYWORD_TEXT_MOVE_3    = Keyword("TD")
	KEYWORD_TEXT_POSITION  = Keyword("TJ")
	KEYWORD_TEXT_SHOW_1    = Keyword("Tj")
	KEYWORD_TEXT_SHOW_2    = Keyword("'")
	KEYWORD_TEXT_SHOW_3    = Keyword("\"")
	KEYWORD_BEGIN_BF_RANGE = Keyword("beginbfrange")
	KEYWORD_BEGIN_BF_CHAR  = Keyword("beginbfchar")
)
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const (
	XrefTypeFreeObject = iota
	XrefTypeIndirectObject
	XrefTypeCompressedObject
)

Variables

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var EncryptionError = errors.New("missing required encryption info")

errors

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var EncryptionPasswordError = errors.New("incorrect password")
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var EncryptionUnsupported = errors.New("unsupported encryption")
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var EndOfArray = errors.New("end of array")
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var EndOfDictionary = errors.New("end of dictionary")
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var EndOfHexString = errors.New("end of hex string")
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var EndOfString = errors.New("end of string")
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var InvalidDictionaryKeyType = "invalid dictionary key type"

format errors and abnormalities

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var InvalidHexStringChar = "invalid hex string character"
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var InvalidNameEscapeChar = "invalid name escape character"
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var InvalidOctal = "invalid octal in string"
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var MissingDictionaryValue = "missing dictionary value"
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var ReadError = errors.New("read failed")
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var UnclosedArray = "unclosed array"
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var UnclosedDictionary = "unclosed dictionary"
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var UnclosedHexString = "unclosed hex string"
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var UnclosedStream = "unclosed stream"
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var UnclosedString = "unclosed string"
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var UnclosedStringEscape = "unclosed escape in string"
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var UnclosedStringOctal = "unclosed octal in string"
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var UnnecessaryEscapeName = "unnecessary espace sequence in name"
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var UnnecessaryEscapeString = "unnecessary espace sequence in string"
View Source 
var Verbose *bool

Functions

func ASCII85Decode 

func ASCII85Decode(data []byte) []byte

func ASCIIHexDecode 

func ASCIIHexDecode(data []byte) []byte

func BytesToInt 

func BytesToInt(b []byte) int

func Debug 

func Debug(format string, a ...interface{})

func DecodeStream 

func DecodeStream(filter string, data []byte, decode_parms Dictionary) []byte

func FlateDecode 

func FlateDecode(data []byte, decode_parms Dictionary) []byte

func GetBits 

func GetBits(d []byte, p int, n int) uint32

GetBits gets n bits from d starting at p

func IsHex 

func IsHex(b byte) bool

IsHex returns true if the byte is a hex character

func LZWDecode 

func LZWDecode(data []byte, decode_parms Dictionary) []byte

func Parse 

func Parse(file_path string, password string, output_dir string) error

func ReadInt 

func ReadInt(reader io.Reader, width int) (int, bool)

ReadInt reads width bytes from reader and returns the int64 value

func ReadInt64 

func ReadInt64(reader io.Reader, width int) (int64, bool)

ReadInt reads width bytes from reader and returns the int64 value

func ReversePredictor 

func ReversePredictor(data []byte, decode_parms Dictionary) []byte

func RunLengthDecode 

func RunLengthDecode(data []byte) []byte

func SetBits 

func SetBits(d []byte, p int, n int, v uint32)

SetBits sets n bits in d starting at p to the last n bits of v

Types

type Action 

type Action Dictionary

func (Action) Extract 

func (a Action) Extract(output *Output)

type Array 

type Array []Object

func (Array) GetArray 

func (a Array) GetArray(index int) (Array, bool)

func (Array) GetBool 

func (a Array) GetBool(index int) (bool, bool)

func (Array) GetBytes 

func (a Array) GetBytes(index int) ([]byte, bool)

func (Array) GetDictionary 

func (a Array) GetDictionary(index int) (Dictionary, bool)

func (Array) GetInt 

func (a Array) GetInt(index int) (int, bool)

func (Array) GetInt64 

func (a Array) GetInt64(index int) (int64, bool)

func (Array) GetName 

func (a Array) GetName(index int) (string, bool)

func (Array) GetNumber 

func (a Array) GetNumber(index int) (Number, bool)

func (Array) GetObject 

func (a Array) GetObject(index int) (Object, bool)

func (Array) GetStream 

func (a Array) GetStream(index int) ([]byte, bool)

func (Array) GetString 

func (a Array) GetString(index int) (string, bool)

func (Array) String 

func (a Array) String() string

type CryptFilter 

type CryptFilter interface {
	NewDecryptor(int, int) Decryptor
}

type CryptFilterAES 

type CryptFilterAES struct {
	// contains filtered or unexported fields
}

AES

func (*CryptFilterAES) NewDecryptor 

func (c *CryptFilterAES) NewDecryptor(n int, g int) Decryptor

type CryptFilterNone 

type CryptFilterNone struct{}

No encryption

func (*CryptFilterNone) NewDecryptor 

func (c *CryptFilterNone) NewDecryptor(n int, g int) Decryptor

type CryptFilterRC4 

type CryptFilterRC4 struct {
	// contains filtered or unexported fields
}

RC4

func (*CryptFilterRC4) NewDecryptor 

func (c *CryptFilterRC4) NewDecryptor(n int, g int) Decryptor

type Decryptor 

type Decryptor interface {
	Decrypt([]byte)
}

type DecryptorAES 

type DecryptorAES struct {
	// contains filtered or unexported fields
}

func (*DecryptorAES) Decrypt 

func (d *DecryptorAES) Decrypt(data []byte)

type DecryptorNone 

type DecryptorNone struct{}

func (*DecryptorNone) Decrypt 

func (d *DecryptorNone) Decrypt(data []byte)

type DecryptorRC4 

type DecryptorRC4 struct {
	// contains filtered or unexported fields
}

func (*DecryptorRC4) Decrypt 

func (d *DecryptorRC4) Decrypt(data []byte)

type Dictionary 

type Dictionary map[string]Object

func (Dictionary) GetArray 

func (d Dictionary) GetArray(key string) (Array, bool)

func (Dictionary) GetBool 

func (d Dictionary) GetBool(key string) (bool, bool)

func (Dictionary) GetBytes 

func (d Dictionary) GetBytes(key string) ([]byte, bool)

func (Dictionary) GetDictionary 

func (d Dictionary) GetDictionary(key string) (Dictionary, bool)

func (Dictionary) GetInt 

func (d Dictionary) GetInt(key string) (int, bool)

func (Dictionary) GetInt64 

func (d Dictionary) GetInt64(key string) (int64, bool)

func (Dictionary) GetName 

func (d Dictionary) GetName(key string) (string, bool)

func (Dictionary) GetNameTreeMap 

func (d Dictionary) GetNameTreeMap(key string) Array

func (Dictionary) GetNumber 

func (d Dictionary) GetNumber(key string) (Number, bool)

func (Dictionary) GetObject 

func (d Dictionary) GetObject(key string) (Object, bool)

func (Dictionary) GetPageTree 

func (d Dictionary) GetPageTree(key string) ([]Dictionary, bool)

func (Dictionary) GetReference 

func (d Dictionary) GetReference(key string) (*Reference, bool)

func (Dictionary) GetStream 

func (d Dictionary) GetStream(key string) ([]byte, bool)

func (Dictionary) GetString 

func (d Dictionary) GetString(key string) (string, bool)

func (Dictionary) ResolveKids 

func (d Dictionary) ResolveKids(resolved_kids map[int]interface{}) []Dictionary

func (Dictionary) String 

func (d Dictionary) String() string

type File 

type File Dictionary

func (File) Extract 

func (file File) Extract(output *Output, isCommand bool)

type Font 

type Font struct {
	Cmap  map[int]string
	Width int
}
var FontDefault *Font = &Font{map[int]string{}, 1}

func NewFont 

func NewFont(d Dictionary) *Font

func (*Font) Decode 

func (font *Font) Decode(b []byte) string

type IndirectObject 

type IndirectObject struct {
	Number     int
	Generation int
	Value      Object
	Stream     []byte
}

func NewIndirectObject 

func NewIndirectObject(number int) *IndirectObject

func (*IndirectObject) Extract 

func (object *IndirectObject) Extract(output *Output)

func (*IndirectObject) String 

func (object *IndirectObject) String() string

type Keyword 

type Keyword string

func NewKeyword 

func NewKeyword(keyword string) Keyword

func (Keyword) String 

func (keyword Keyword) String() string

type Name 

type Name string

func (Name) String 

func (name Name) String() string

type Number 

type Number float64

func (Number) String 

func (number Number) String() string

type Object 

type Object interface {
	String() string
}

type Output 

type Output struct {
	Commands   *os.File
	Directory  string
	Errors     *os.File
	Files      *os.File
	Javascript *os.File
	Raw        *os.File
	Text       *os.File
	URLs       *os.File
}

func NewOutput 

func NewOutput(directory string) (output *Output, err error)

func (*Output) Close 

func (output *Output) Close()

func (*Output) DumpFile 

func (output *Output) DumpFile(name string, data []byte)

func (*Output) Error 

func (output *Output) Error(message string)

type Page 

type Page Dictionary

func (Page) Extract 

func (page Page) Extract(output *Output)

type Parser 

type Parser struct {
	*bufio.Reader

	Xref map[int]*XrefEntry
	// contains filtered or unexported fields
}

func NewParser 

func NewParser(readSeeker io.ReadSeeker, output *Output) *Parser

func (*Parser) CurrentOffset 

func (parser *Parser) CurrentOffset() int64

func (*Parser) GetObject 

func (parser *Parser) GetObject(number int) *IndirectObject

func (*Parser) Load 

func (parser *Parser) Load(password string) error

func (*Parser) ReadArray 

func (parser *Parser) ReadArray(decryptor Decryptor) Array

func (*Parser) ReadCommand 

func (parser *Parser) ReadCommand() (Keyword, Array, error)

func (*Parser) ReadDictionary 

func (parser *Parser) ReadDictionary(decryptor Decryptor) Dictionary

func (*Parser) ReadHexString 

func (parser *Parser) ReadHexString(decryptor Decryptor) String

func (*Parser) ReadInt 

func (parser *Parser) ReadInt() (int, bool)

func (*Parser) ReadInt64 

func (parser *Parser) ReadInt64() (int64, bool)

func (*Parser) ReadKeyword 

func (parser *Parser) ReadKeyword() Keyword

func (*Parser) ReadName 

func (parser *Parser) ReadName() Name

func (*Parser) ReadNumber 

func (parser *Parser) ReadNumber() Number

func (*Parser) ReadObject 

func (parser *Parser) ReadObject(decryptor Decryptor) (Object, error)

func (*Parser) ReadObjectHeader 

func (parser *Parser) ReadObjectHeader() (int, int, bool)

ReadObjectHeader reads an object header (10 0 obj) from the current position and returns the object number and generation

func (*Parser) ReadStream 

func (parser *Parser) ReadStream(decryptor Decryptor, filter_list Array, decode_parms_list Array) []byte

func (*Parser) ReadString 

func (parser *Parser) ReadString(decryptor Decryptor) String

func (*Parser) Seek 

func (parser *Parser) Seek(offset int64, whence int) (int64, error)

func (*Parser) SetPassword 

func (parser *Parser) SetPassword(password string) error

type Reference 

type Reference struct {
	Number     int
	Generation int
	// contains filtered or unexported fields
}

func NewReference 

func NewReference(parser *Parser, number int, generation int) *Reference

func (*Reference) Resolve 

func (reference *Reference) Resolve() Object

func (*Reference) ResolveStream 

func (reference *Reference) ResolveStream() []byte

func (*Reference) String 

func (reference *Reference) String() string

type SecurityHandler 

type SecurityHandler struct {
	// contains filtered or unexported fields
}

func NewSecurityHandler 

func NewSecurityHandler() *SecurityHandler

func (*SecurityHandler) Init 

func (sh *SecurityHandler) Init(password []byte, trailer Dictionary) error

type String 

type String string

func (String) String 

func (s String) String() string

type XrefEntry 

type XrefEntry struct {
	Offset       int64
	Generation   int
	Type         int
	IsEncrypted  bool
	IsXrefStream bool
}

func NewXrefEntry 

func NewXrefEntry(offset int64, generation int, type_value int) *XrefEntry

Source Files

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