From 84d2482ddbff9564c9ad75b2d30af66e3ddfd44d Mon Sep 17 00:00:00 2001 From: Christopher Speller Date: Thu, 12 May 2016 15:08:58 -0400 Subject: Updating go depencancies. Switching to go1.6 vendoring (#2949) --- vendor/gopkg.in/asn1-ber.v1/.travis.yml | 15 + vendor/gopkg.in/asn1-ber.v1/LICENSE | 27 ++ vendor/gopkg.in/asn1-ber.v1/README.md | 24 ++ vendor/gopkg.in/asn1-ber.v1/ber.go | 504 +++++++++++++++++++++++++++++ vendor/gopkg.in/asn1-ber.v1/content_int.go | 25 ++ vendor/gopkg.in/asn1-ber.v1/header.go | 29 ++ vendor/gopkg.in/asn1-ber.v1/identifier.go | 103 ++++++ vendor/gopkg.in/asn1-ber.v1/length.go | 71 ++++ vendor/gopkg.in/asn1-ber.v1/util.go | 24 ++ 9 files changed, 822 insertions(+) create mode 100644 vendor/gopkg.in/asn1-ber.v1/.travis.yml create mode 100644 vendor/gopkg.in/asn1-ber.v1/LICENSE create mode 100644 vendor/gopkg.in/asn1-ber.v1/README.md create mode 100644 vendor/gopkg.in/asn1-ber.v1/ber.go create mode 100644 vendor/gopkg.in/asn1-ber.v1/content_int.go create mode 100644 vendor/gopkg.in/asn1-ber.v1/header.go create mode 100644 vendor/gopkg.in/asn1-ber.v1/identifier.go create mode 100644 vendor/gopkg.in/asn1-ber.v1/length.go create mode 100644 vendor/gopkg.in/asn1-ber.v1/util.go (limited to 'vendor/gopkg.in/asn1-ber.v1') diff --git a/vendor/gopkg.in/asn1-ber.v1/.travis.yml b/vendor/gopkg.in/asn1-ber.v1/.travis.yml new file mode 100644 index 000000000..44aa48b87 --- /dev/null +++ b/vendor/gopkg.in/asn1-ber.v1/.travis.yml @@ -0,0 +1,15 @@ +language: go +go: + - 1.2 + - 1.3 + - 1.4 + - 1.5 + - tip +go_import_path: gopkg.in/asn-ber.v1 +install: + - go list -f '{{range .Imports}}{{.}} {{end}}' ./... | xargs go get -v + - go list -f '{{range .TestImports}}{{.}} {{end}}' ./... | xargs go get -v + - go get code.google.com/p/go.tools/cmd/cover || go get golang.org/x/tools/cmd/cover + - go build -v ./... +script: + - go test -v -cover ./... diff --git a/vendor/gopkg.in/asn1-ber.v1/LICENSE b/vendor/gopkg.in/asn1-ber.v1/LICENSE new file mode 100644 index 000000000..744875676 --- /dev/null +++ b/vendor/gopkg.in/asn1-ber.v1/LICENSE @@ -0,0 +1,27 @@ +Copyright (c) 2012 The Go Authors. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/gopkg.in/asn1-ber.v1/README.md b/vendor/gopkg.in/asn1-ber.v1/README.md new file mode 100644 index 000000000..e3a9560d6 --- /dev/null +++ b/vendor/gopkg.in/asn1-ber.v1/README.md @@ -0,0 +1,24 @@ +[![GoDoc](https://godoc.org/gopkg.in/asn1-ber.v1?status.svg)](https://godoc.org/gopkg.in/asn1-ber.v1) [![Build Status](https://travis-ci.org/go-asn1-ber/asn1-ber.svg)](https://travis-ci.org/go-asn1-ber/asn1-ber) + + +ASN1 BER Encoding / Decoding Library for the GO programming language. +--------------------------------------------------------------------- + +Required libraries: + None + +Working: + Very basic encoding / decoding needed for LDAP protocol + +Tests Implemented: + A few + +TODO: + Fix all encoding / decoding to conform to ASN1 BER spec + Implement Tests / Benchmarks + +--- + +The Go gopher was designed by Renee French. (http://reneefrench.blogspot.com/) +The design is licensed under the Creative Commons 3.0 Attributions license. +Read this article for more details: http://blog.golang.org/gopher diff --git a/vendor/gopkg.in/asn1-ber.v1/ber.go b/vendor/gopkg.in/asn1-ber.v1/ber.go new file mode 100644 index 000000000..25cc921be --- /dev/null +++ b/vendor/gopkg.in/asn1-ber.v1/ber.go @@ -0,0 +1,504 @@ +package ber + +import ( + "bytes" + "errors" + "fmt" + "io" + "os" + "reflect" +) + +type Packet struct { + Identifier + Value interface{} + ByteValue []byte + Data *bytes.Buffer + Children []*Packet + Description string +} + +type Identifier struct { + ClassType Class + TagType Type + Tag Tag +} + +type Tag uint64 + +const ( + TagEOC Tag = 0x00 + TagBoolean Tag = 0x01 + TagInteger Tag = 0x02 + TagBitString Tag = 0x03 + TagOctetString Tag = 0x04 + TagNULL Tag = 0x05 + TagObjectIdentifier Tag = 0x06 + TagObjectDescriptor Tag = 0x07 + TagExternal Tag = 0x08 + TagRealFloat Tag = 0x09 + TagEnumerated Tag = 0x0a + TagEmbeddedPDV Tag = 0x0b + TagUTF8String Tag = 0x0c + TagRelativeOID Tag = 0x0d + TagSequence Tag = 0x10 + TagSet Tag = 0x11 + TagNumericString Tag = 0x12 + TagPrintableString Tag = 0x13 + TagT61String Tag = 0x14 + TagVideotexString Tag = 0x15 + TagIA5String Tag = 0x16 + TagUTCTime Tag = 0x17 + TagGeneralizedTime Tag = 0x18 + TagGraphicString Tag = 0x19 + TagVisibleString Tag = 0x1a + TagGeneralString Tag = 0x1b + TagUniversalString Tag = 0x1c + TagCharacterString Tag = 0x1d + TagBMPString Tag = 0x1e + TagBitmask Tag = 0x1f // xxx11111b + + // HighTag indicates the start of a high-tag byte sequence + HighTag Tag = 0x1f // xxx11111b + // HighTagContinueBitmask indicates the high-tag byte sequence should continue + HighTagContinueBitmask Tag = 0x80 // 10000000b + // HighTagValueBitmask obtains the tag value from a high-tag byte sequence byte + HighTagValueBitmask Tag = 0x7f // 01111111b +) + +const ( + // LengthLongFormBitmask is the mask to apply to the length byte to see if a long-form byte sequence is used + LengthLongFormBitmask = 0x80 + // LengthValueBitmask is the mask to apply to the length byte to get the number of bytes in the long-form byte sequence + LengthValueBitmask = 0x7f + + // LengthIndefinite is returned from readLength to indicate an indefinite length + LengthIndefinite = -1 +) + +var tagMap = map[Tag]string{ + TagEOC: "EOC (End-of-Content)", + TagBoolean: "Boolean", + TagInteger: "Integer", + TagBitString: "Bit String", + TagOctetString: "Octet String", + TagNULL: "NULL", + TagObjectIdentifier: "Object Identifier", + TagObjectDescriptor: "Object Descriptor", + TagExternal: "External", + TagRealFloat: "Real (float)", + TagEnumerated: "Enumerated", + TagEmbeddedPDV: "Embedded PDV", + TagUTF8String: "UTF8 String", + TagRelativeOID: "Relative-OID", + TagSequence: "Sequence and Sequence of", + TagSet: "Set and Set OF", + TagNumericString: "Numeric String", + TagPrintableString: "Printable String", + TagT61String: "T61 String", + TagVideotexString: "Videotex String", + TagIA5String: "IA5 String", + TagUTCTime: "UTC Time", + TagGeneralizedTime: "Generalized Time", + TagGraphicString: "Graphic String", + TagVisibleString: "Visible String", + TagGeneralString: "General String", + TagUniversalString: "Universal String", + TagCharacterString: "Character String", + TagBMPString: "BMP String", +} + +type Class uint8 + +const ( + ClassUniversal Class = 0 // 00xxxxxxb + ClassApplication Class = 64 // 01xxxxxxb + ClassContext Class = 128 // 10xxxxxxb + ClassPrivate Class = 192 // 11xxxxxxb + ClassBitmask Class = 192 // 11xxxxxxb +) + +var ClassMap = map[Class]string{ + ClassUniversal: "Universal", + ClassApplication: "Application", + ClassContext: "Context", + ClassPrivate: "Private", +} + +type Type uint8 + +const ( + TypePrimitive Type = 0 // xx0xxxxxb + TypeConstructed Type = 32 // xx1xxxxxb + TypeBitmask Type = 32 // xx1xxxxxb +) + +var TypeMap = map[Type]string{ + TypePrimitive: "Primitive", + TypeConstructed: "Constructed", +} + +var Debug bool = false + +func PrintBytes(out io.Writer, buf []byte, indent string) { + data_lines := make([]string, (len(buf)/30)+1) + num_lines := make([]string, (len(buf)/30)+1) + + for i, b := range buf { + data_lines[i/30] += fmt.Sprintf("%02x ", b) + num_lines[i/30] += fmt.Sprintf("%02d ", (i+1)%100) + } + + for i := 0; i < len(data_lines); i++ { + out.Write([]byte(indent + data_lines[i] + "\n")) + out.Write([]byte(indent + num_lines[i] + "\n\n")) + } +} + +func PrintPacket(p *Packet) { + printPacket(os.Stdout, p, 0, false) +} + +func printPacket(out io.Writer, p *Packet, indent int, printBytes bool) { + indent_str := "" + + for len(indent_str) != indent { + indent_str += " " + } + + class_str := ClassMap[p.ClassType] + + tagtype_str := TypeMap[p.TagType] + + tag_str := fmt.Sprintf("0x%02X", p.Tag) + + if p.ClassType == ClassUniversal { + tag_str = tagMap[p.Tag] + } + + value := fmt.Sprint(p.Value) + description := "" + + if p.Description != "" { + description = p.Description + ": " + } + + fmt.Fprintf(out, "%s%s(%s, %s, %s) Len=%d %q\n", indent_str, description, class_str, tagtype_str, tag_str, p.Data.Len(), value) + + if printBytes { + PrintBytes(out, p.Bytes(), indent_str) + } + + for _, child := range p.Children { + printPacket(out, child, indent+1, printBytes) + } +} + +// ReadPacket reads a single Packet from the reader +func ReadPacket(reader io.Reader) (*Packet, error) { + p, _, err := readPacket(reader) + if err != nil { + return nil, err + } + return p, nil +} + +func DecodeString(data []byte) string { + return string(data) +} + +func parseInt64(bytes []byte) (ret int64, err error) { + if len(bytes) > 8 { + // We'll overflow an int64 in this case. + err = fmt.Errorf("integer too large") + return + } + for bytesRead := 0; bytesRead < len(bytes); bytesRead++ { + ret <<= 8 + ret |= int64(bytes[bytesRead]) + } + + // Shift up and down in order to sign extend the result. + ret <<= 64 - uint8(len(bytes))*8 + ret >>= 64 - uint8(len(bytes))*8 + return +} + +func encodeInteger(i int64) []byte { + n := int64Length(i) + out := make([]byte, n) + + var j int + for ; n > 0; n-- { + out[j] = (byte(i >> uint((n-1)*8))) + j++ + } + + return out +} + +func int64Length(i int64) (numBytes int) { + numBytes = 1 + + for i > 127 { + numBytes++ + i >>= 8 + } + + for i < -128 { + numBytes++ + i >>= 8 + } + + return +} + +// DecodePacket decodes the given bytes into a single Packet +// If a decode error is encountered, nil is returned. +func DecodePacket(data []byte) *Packet { + p, _, _ := readPacket(bytes.NewBuffer(data)) + + return p +} + +// DecodePacketErr decodes the given bytes into a single Packet +// If a decode error is encountered, nil is returned +func DecodePacketErr(data []byte) (*Packet, error) { + p, _, err := readPacket(bytes.NewBuffer(data)) + if err != nil { + return nil, err + } + return p, nil +} + +// readPacket reads a single Packet from the reader, returning the number of bytes read +func readPacket(reader io.Reader) (*Packet, int, error) { + identifier, length, read, err := readHeader(reader) + if err != nil { + return nil, read, err + } + + p := &Packet{ + Identifier: identifier, + } + + p.Data = new(bytes.Buffer) + p.Children = make([]*Packet, 0, 2) + p.Value = nil + + if p.TagType == TypeConstructed { + // TODO: if universal, ensure tag type is allowed to be constructed + + // Track how much content we've read + contentRead := 0 + for { + if length != LengthIndefinite { + // End if we've read what we've been told to + if contentRead == length { + break + } + // Detect if a packet boundary didn't fall on the expected length + if contentRead > length { + return nil, read, fmt.Errorf("expected to read %d bytes, read %d", length, contentRead) + } + } + + // Read the next packet + child, r, err := readPacket(reader) + if err != nil { + return nil, read, err + } + contentRead += r + read += r + + // Test is this is the EOC marker for our packet + if isEOCPacket(child) { + if length == LengthIndefinite { + break + } + return nil, read, errors.New("eoc child not allowed with definite length") + } + + // Append and continue + p.AppendChild(child) + } + return p, read, nil + } + + if length == LengthIndefinite { + return nil, read, errors.New("indefinite length used with primitive type") + } + + // Read definite-length content + content := make([]byte, length, length) + if length > 0 { + _, err := io.ReadFull(reader, content) + if err != nil { + if err == io.EOF { + return nil, read, io.ErrUnexpectedEOF + } + return nil, read, err + } + read += length + } + + if p.ClassType == ClassUniversal { + p.Data.Write(content) + p.ByteValue = content + + switch p.Tag { + case TagEOC: + case TagBoolean: + val, _ := parseInt64(content) + + p.Value = val != 0 + case TagInteger: + p.Value, _ = parseInt64(content) + case TagBitString: + case TagOctetString: + // the actual string encoding is not known here + // (e.g. for LDAP content is already an UTF8-encoded + // string). Return the data without further processing + p.Value = DecodeString(content) + case TagNULL: + case TagObjectIdentifier: + case TagObjectDescriptor: + case TagExternal: + case TagRealFloat: + case TagEnumerated: + p.Value, _ = parseInt64(content) + case TagEmbeddedPDV: + case TagUTF8String: + p.Value = DecodeString(content) + case TagRelativeOID: + case TagSequence: + case TagSet: + case TagNumericString: + case TagPrintableString: + p.Value = DecodeString(content) + case TagT61String: + case TagVideotexString: + case TagIA5String: + case TagUTCTime: + case TagGeneralizedTime: + case TagGraphicString: + case TagVisibleString: + case TagGeneralString: + case TagUniversalString: + case TagCharacterString: + case TagBMPString: + } + } else { + p.Data.Write(content) + } + + return p, read, nil +} + +func (p *Packet) Bytes() []byte { + var out bytes.Buffer + + out.Write(encodeIdentifier(p.Identifier)) + out.Write(encodeLength(p.Data.Len())) + out.Write(p.Data.Bytes()) + + return out.Bytes() +} + +func (p *Packet) AppendChild(child *Packet) { + p.Data.Write(child.Bytes()) + p.Children = append(p.Children, child) +} + +func Encode(ClassType Class, TagType Type, Tag Tag, Value interface{}, Description string) *Packet { + p := new(Packet) + + p.ClassType = ClassType + p.TagType = TagType + p.Tag = Tag + p.Data = new(bytes.Buffer) + + p.Children = make([]*Packet, 0, 2) + + p.Value = Value + p.Description = Description + + if Value != nil { + v := reflect.ValueOf(Value) + + if ClassType == ClassUniversal { + switch Tag { + case TagOctetString: + sv, ok := v.Interface().(string) + + if ok { + p.Data.Write([]byte(sv)) + } + } + } + } + + return p +} + +func NewSequence(Description string) *Packet { + return Encode(ClassUniversal, TypeConstructed, TagSequence, nil, Description) +} + +func NewBoolean(ClassType Class, TagType Type, Tag Tag, Value bool, Description string) *Packet { + intValue := int64(0) + + if Value { + intValue = 1 + } + + p := Encode(ClassType, TagType, Tag, nil, Description) + + p.Value = Value + p.Data.Write(encodeInteger(intValue)) + + return p +} + +func NewInteger(ClassType Class, TagType Type, Tag Tag, Value interface{}, Description string) *Packet { + p := Encode(ClassType, TagType, Tag, nil, Description) + + p.Value = Value + switch v := Value.(type) { + case int: + p.Data.Write(encodeInteger(int64(v))) + case uint: + p.Data.Write(encodeInteger(int64(v))) + case int64: + p.Data.Write(encodeInteger(v)) + case uint64: + // TODO : check range or add encodeUInt... + p.Data.Write(encodeInteger(int64(v))) + case int32: + p.Data.Write(encodeInteger(int64(v))) + case uint32: + p.Data.Write(encodeInteger(int64(v))) + case int16: + p.Data.Write(encodeInteger(int64(v))) + case uint16: + p.Data.Write(encodeInteger(int64(v))) + case int8: + p.Data.Write(encodeInteger(int64(v))) + case uint8: + p.Data.Write(encodeInteger(int64(v))) + default: + // TODO : add support for big.Int ? + panic(fmt.Sprintf("Invalid type %T, expected {u|}int{64|32|16|8}", v)) + } + + return p +} + +func NewString(ClassType Class, TagType Type, Tag Tag, Value, Description string) *Packet { + p := Encode(ClassType, TagType, Tag, nil, Description) + + p.Value = Value + p.Data.Write([]byte(Value)) + + return p +} diff --git a/vendor/gopkg.in/asn1-ber.v1/content_int.go b/vendor/gopkg.in/asn1-ber.v1/content_int.go new file mode 100644 index 000000000..1858b74b6 --- /dev/null +++ b/vendor/gopkg.in/asn1-ber.v1/content_int.go @@ -0,0 +1,25 @@ +package ber + +func encodeUnsignedInteger(i uint64) []byte { + n := uint64Length(i) + out := make([]byte, n) + + var j int + for ; n > 0; n-- { + out[j] = (byte(i >> uint((n-1)*8))) + j++ + } + + return out +} + +func uint64Length(i uint64) (numBytes int) { + numBytes = 1 + + for i > 255 { + numBytes++ + i >>= 8 + } + + return +} diff --git a/vendor/gopkg.in/asn1-ber.v1/header.go b/vendor/gopkg.in/asn1-ber.v1/header.go new file mode 100644 index 000000000..123744e9b --- /dev/null +++ b/vendor/gopkg.in/asn1-ber.v1/header.go @@ -0,0 +1,29 @@ +package ber + +import ( + "errors" + "io" +) + +func readHeader(reader io.Reader) (identifier Identifier, length int, read int, err error) { + if i, c, err := readIdentifier(reader); err != nil { + return Identifier{}, 0, read, err + } else { + identifier = i + read += c + } + + if l, c, err := readLength(reader); err != nil { + return Identifier{}, 0, read, err + } else { + length = l + read += c + } + + // Validate length type with identifier (x.600, 8.1.3.2.a) + if length == LengthIndefinite && identifier.TagType == TypePrimitive { + return Identifier{}, 0, read, errors.New("indefinite length used with primitive type") + } + + return identifier, length, read, nil +} diff --git a/vendor/gopkg.in/asn1-ber.v1/identifier.go b/vendor/gopkg.in/asn1-ber.v1/identifier.go new file mode 100644 index 000000000..f7672a844 --- /dev/null +++ b/vendor/gopkg.in/asn1-ber.v1/identifier.go @@ -0,0 +1,103 @@ +package ber + +import ( + "errors" + "fmt" + "io" + "math" +) + +func readIdentifier(reader io.Reader) (Identifier, int, error) { + identifier := Identifier{} + read := 0 + + // identifier byte + b, err := readByte(reader) + if err != nil { + if Debug { + fmt.Printf("error reading identifier byte: %v\n", err) + } + return Identifier{}, read, err + } + read++ + + identifier.ClassType = Class(b) & ClassBitmask + identifier.TagType = Type(b) & TypeBitmask + + if tag := Tag(b) & TagBitmask; tag != HighTag { + // short-form tag + identifier.Tag = tag + return identifier, read, nil + } + + // high-tag-number tag + tagBytes := 0 + for { + b, err := readByte(reader) + if err != nil { + if Debug { + fmt.Printf("error reading high-tag-number tag byte %d: %v\n", tagBytes, err) + } + return Identifier{}, read, err + } + tagBytes++ + read++ + + // Lowest 7 bits get appended to the tag value (x.690, 8.1.2.4.2.b) + identifier.Tag <<= 7 + identifier.Tag |= Tag(b) & HighTagValueBitmask + + // First byte may not be all zeros (x.690, 8.1.2.4.2.c) + if tagBytes == 1 && identifier.Tag == 0 { + return Identifier{}, read, errors.New("invalid first high-tag-number tag byte") + } + // Overflow of int64 + // TODO: support big int tags? + if tagBytes > 9 { + return Identifier{}, read, errors.New("high-tag-number tag overflow") + } + + // Top bit of 0 means this is the last byte in the high-tag-number tag (x.690, 8.1.2.4.2.a) + if Tag(b)&HighTagContinueBitmask == 0 { + break + } + } + + return identifier, read, nil +} + +func encodeIdentifier(identifier Identifier) []byte { + b := []byte{0x0} + b[0] |= byte(identifier.ClassType) + b[0] |= byte(identifier.TagType) + + if identifier.Tag < HighTag { + // Short-form + b[0] |= byte(identifier.Tag) + } else { + // high-tag-number + b[0] |= byte(HighTag) + + tag := identifier.Tag + + highBit := uint(63) + for { + if tag&(1<= 0; i-- { + offset := uint(i) * 7 + mask := Tag(0x7f) << offset + tagByte := (tag & mask) >> offset + if i != 0 { + tagByte |= 0x80 + } + b = append(b, byte(tagByte)) + } + } + return b +} diff --git a/vendor/gopkg.in/asn1-ber.v1/length.go b/vendor/gopkg.in/asn1-ber.v1/length.go new file mode 100644 index 000000000..8e2ae4ddd --- /dev/null +++ b/vendor/gopkg.in/asn1-ber.v1/length.go @@ -0,0 +1,71 @@ +package ber + +import ( + "errors" + "fmt" + "io" +) + +func readLength(reader io.Reader) (length int, read int, err error) { + // length byte + b, err := readByte(reader) + if err != nil { + if Debug { + fmt.Printf("error reading length byte: %v\n", err) + } + return 0, 0, err + } + read++ + + switch { + case b == 0xFF: + // Invalid 0xFF (x.600, 8.1.3.5.c) + return 0, read, errors.New("invalid length byte 0xff") + + case b == LengthLongFormBitmask: + // Indefinite form, we have to decode packets until we encounter an EOC packet (x.600, 8.1.3.6) + length = LengthIndefinite + + case b&LengthLongFormBitmask == 0: + // Short definite form, extract the length from the bottom 7 bits (x.600, 8.1.3.4) + length = int(b) & LengthValueBitmask + + case b&LengthLongFormBitmask != 0: + // Long definite form, extract the number of length bytes to follow from the bottom 7 bits (x.600, 8.1.3.5.b) + lengthBytes := int(b) & LengthValueBitmask + // Protect against overflow + // TODO: support big int length? + if lengthBytes > 8 { + return 0, read, errors.New("long-form length overflow") + } + for i := 0; i < lengthBytes; i++ { + b, err = readByte(reader) + if err != nil { + if Debug { + fmt.Printf("error reading long-form length byte %d: %v\n", i, err) + } + return 0, read, err + } + read++ + + // x.600, 8.1.3.5 + length <<= 8 + length |= int(b) + } + + default: + return 0, read, errors.New("invalid length byte") + } + + return length, read, nil +} + +func encodeLength(length int) []byte { + length_bytes := encodeUnsignedInteger(uint64(length)) + if length > 127 || len(length_bytes) > 1 { + longFormBytes := []byte{(LengthLongFormBitmask | byte(len(length_bytes)))} + longFormBytes = append(longFormBytes, length_bytes...) + length_bytes = longFormBytes + } + return length_bytes +} diff --git a/vendor/gopkg.in/asn1-ber.v1/util.go b/vendor/gopkg.in/asn1-ber.v1/util.go new file mode 100644 index 000000000..3e56b66c8 --- /dev/null +++ b/vendor/gopkg.in/asn1-ber.v1/util.go @@ -0,0 +1,24 @@ +package ber + +import "io" + +func readByte(reader io.Reader) (byte, error) { + bytes := make([]byte, 1, 1) + _, err := io.ReadFull(reader, bytes) + if err != nil { + if err == io.EOF { + return 0, io.ErrUnexpectedEOF + } + return 0, err + } + return bytes[0], nil +} + +func isEOCPacket(p *Packet) bool { + return p != nil && + p.Tag == TagEOC && + p.ClassType == ClassUniversal && + p.TagType == TypePrimitive && + len(p.ByteValue) == 0 && + len(p.Children) == 0 +} -- cgit v1.2.3-1-g7c22