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-rw-r--r--libgo/go/encoding/asn1/asn1.go841
-rw-r--r--libgo/go/encoding/asn1/asn1_test.go689
-rw-r--r--libgo/go/encoding/asn1/common.go158
-rw-r--r--libgo/go/encoding/asn1/marshal.go547
-rw-r--r--libgo/go/encoding/asn1/marshal_test.go129
5 files changed, 2364 insertions, 0 deletions
diff --git a/libgo/go/encoding/asn1/asn1.go b/libgo/go/encoding/asn1/asn1.go
new file mode 100644
index 0000000..a006665
--- /dev/null
+++ b/libgo/go/encoding/asn1/asn1.go
@@ -0,0 +1,841 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package asn1 implements parsing of DER-encoded ASN.1 data structures,
+// as defined in ITU-T Rec X.690.
+//
+// See also ``A Layman's Guide to a Subset of ASN.1, BER, and DER,''
+// http://luca.ntop.org/Teaching/Appunti/asn1.html.
+package asn1
+
+// ASN.1 is a syntax for specifying abstract objects and BER, DER, PER, XER etc
+// are different encoding formats for those objects. Here, we'll be dealing
+// with DER, the Distinguished Encoding Rules. DER is used in X.509 because
+// it's fast to parse and, unlike BER, has a unique encoding for every object.
+// When calculating hashes over objects, it's important that the resulting
+// bytes be the same at both ends and DER removes this margin of error.
+//
+// ASN.1 is very complex and this package doesn't attempt to implement
+// everything by any means.
+
+import (
+ "fmt"
+ "math/big"
+ "reflect"
+ "time"
+)
+
+// A StructuralError suggests that the ASN.1 data is valid, but the Go type
+// which is receiving it doesn't match.
+type StructuralError struct {
+ Msg string
+}
+
+func (e StructuralError) Error() string { return "ASN.1 structure error: " + e.Msg }
+
+// A SyntaxError suggests that the ASN.1 data is invalid.
+type SyntaxError struct {
+ Msg string
+}
+
+func (e SyntaxError) Error() string { return "ASN.1 syntax error: " + e.Msg }
+
+// We start by dealing with each of the primitive types in turn.
+
+// BOOLEAN
+
+func parseBool(bytes []byte) (ret bool, err error) {
+ if len(bytes) != 1 {
+ err = SyntaxError{"invalid boolean"}
+ return
+ }
+
+ return bytes[0] != 0, nil
+}
+
+// INTEGER
+
+// parseInt64 treats the given bytes as a big-endian, signed integer and
+// returns the result.
+func parseInt64(bytes []byte) (ret int64, err error) {
+ if len(bytes) > 8 {
+ // We'll overflow an int64 in this case.
+ err = StructuralError{"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
+}
+
+// parseInt treats the given bytes as a big-endian, signed integer and returns
+// the result.
+func parseInt(bytes []byte) (int, error) {
+ ret64, err := parseInt64(bytes)
+ if err != nil {
+ return 0, err
+ }
+ if ret64 != int64(int(ret64)) {
+ return 0, StructuralError{"integer too large"}
+ }
+ return int(ret64), nil
+}
+
+var bigOne = big.NewInt(1)
+
+// parseBigInt treats the given bytes as a big-endian, signed integer and returns
+// the result.
+func parseBigInt(bytes []byte) *big.Int {
+ ret := new(big.Int)
+ if len(bytes) > 0 && bytes[0]&0x80 == 0x80 {
+ // This is a negative number.
+ notBytes := make([]byte, len(bytes))
+ for i := range notBytes {
+ notBytes[i] = ^bytes[i]
+ }
+ ret.SetBytes(notBytes)
+ ret.Add(ret, bigOne)
+ ret.Neg(ret)
+ return ret
+ }
+ ret.SetBytes(bytes)
+ return ret
+}
+
+// BIT STRING
+
+// BitString is the structure to use when you want an ASN.1 BIT STRING type. A
+// bit string is padded up to the nearest byte in memory and the number of
+// valid bits is recorded. Padding bits will be zero.
+type BitString struct {
+ Bytes []byte // bits packed into bytes.
+ BitLength int // length in bits.
+}
+
+// At returns the bit at the given index. If the index is out of range it
+// returns false.
+func (b BitString) At(i int) int {
+ if i < 0 || i >= b.BitLength {
+ return 0
+ }
+ x := i / 8
+ y := 7 - uint(i%8)
+ return int(b.Bytes[x]>>y) & 1
+}
+
+// RightAlign returns a slice where the padding bits are at the beginning. The
+// slice may share memory with the BitString.
+func (b BitString) RightAlign() []byte {
+ shift := uint(8 - (b.BitLength % 8))
+ if shift == 8 || len(b.Bytes) == 0 {
+ return b.Bytes
+ }
+
+ a := make([]byte, len(b.Bytes))
+ a[0] = b.Bytes[0] >> shift
+ for i := 1; i < len(b.Bytes); i++ {
+ a[i] = b.Bytes[i-1] << (8 - shift)
+ a[i] |= b.Bytes[i] >> shift
+ }
+
+ return a
+}
+
+// parseBitString parses an ASN.1 bit string from the given byte slice and returns it.
+func parseBitString(bytes []byte) (ret BitString, err error) {
+ if len(bytes) == 0 {
+ err = SyntaxError{"zero length BIT STRING"}
+ return
+ }
+ paddingBits := int(bytes[0])
+ if paddingBits > 7 ||
+ len(bytes) == 1 && paddingBits > 0 ||
+ bytes[len(bytes)-1]&((1<<bytes[0])-1) != 0 {
+ err = SyntaxError{"invalid padding bits in BIT STRING"}
+ return
+ }
+ ret.BitLength = (len(bytes)-1)*8 - paddingBits
+ ret.Bytes = bytes[1:]
+ return
+}
+
+// OBJECT IDENTIFIER
+
+// An ObjectIdentifier represents an ASN.1 OBJECT IDENTIFIER.
+type ObjectIdentifier []int
+
+// Equal returns true iff oi and other represent the same identifier.
+func (oi ObjectIdentifier) Equal(other ObjectIdentifier) bool {
+ if len(oi) != len(other) {
+ return false
+ }
+ for i := 0; i < len(oi); i++ {
+ if oi[i] != other[i] {
+ return false
+ }
+ }
+
+ return true
+}
+
+// parseObjectIdentifier parses an OBJECT IDENTIFIER from the given bytes and
+// returns it. An object identifier is a sequence of variable length integers
+// that are assigned in a hierarchy.
+func parseObjectIdentifier(bytes []byte) (s []int, err error) {
+ if len(bytes) == 0 {
+ err = SyntaxError{"zero length OBJECT IDENTIFIER"}
+ return
+ }
+
+ // In the worst case, we get two elements from the first byte (which is
+ // encoded differently) and then every varint is a single byte long.
+ s = make([]int, len(bytes)+1)
+
+ // The first byte is 40*value1 + value2:
+ s[0] = int(bytes[0]) / 40
+ s[1] = int(bytes[0]) % 40
+ i := 2
+ for offset := 1; offset < len(bytes); i++ {
+ var v int
+ v, offset, err = parseBase128Int(bytes, offset)
+ if err != nil {
+ return
+ }
+ s[i] = v
+ }
+ s = s[0:i]
+ return
+}
+
+// ENUMERATED
+
+// An Enumerated is represented as a plain int.
+type Enumerated int
+
+// FLAG
+
+// A Flag accepts any data and is set to true if present.
+type Flag bool
+
+// parseBase128Int parses a base-128 encoded int from the given offset in the
+// given byte slice. It returns the value and the new offset.
+func parseBase128Int(bytes []byte, initOffset int) (ret, offset int, err error) {
+ offset = initOffset
+ for shifted := 0; offset < len(bytes); shifted++ {
+ if shifted > 4 {
+ err = StructuralError{"base 128 integer too large"}
+ return
+ }
+ ret <<= 7
+ b := bytes[offset]
+ ret |= int(b & 0x7f)
+ offset++
+ if b&0x80 == 0 {
+ return
+ }
+ }
+ err = SyntaxError{"truncated base 128 integer"}
+ return
+}
+
+// UTCTime
+
+func parseUTCTime(bytes []byte) (ret *time.Time, err error) {
+ s := string(bytes)
+ ret, err = time.Parse("0601021504Z0700", s)
+ if err == nil {
+ return
+ }
+ ret, err = time.Parse("060102150405Z0700", s)
+ return
+}
+
+// parseGeneralizedTime parses the GeneralizedTime from the given byte slice
+// and returns the resulting time.
+func parseGeneralizedTime(bytes []byte) (ret *time.Time, err error) {
+ return time.Parse("20060102150405Z0700", string(bytes))
+}
+
+// PrintableString
+
+// parsePrintableString parses a ASN.1 PrintableString from the given byte
+// array and returns it.
+func parsePrintableString(bytes []byte) (ret string, err error) {
+ for _, b := range bytes {
+ if !isPrintable(b) {
+ err = SyntaxError{"PrintableString contains invalid character"}
+ return
+ }
+ }
+ ret = string(bytes)
+ return
+}
+
+// isPrintable returns true iff the given b is in the ASN.1 PrintableString set.
+func isPrintable(b byte) bool {
+ return 'a' <= b && b <= 'z' ||
+ 'A' <= b && b <= 'Z' ||
+ '0' <= b && b <= '9' ||
+ '\'' <= b && b <= ')' ||
+ '+' <= b && b <= '/' ||
+ b == ' ' ||
+ b == ':' ||
+ b == '=' ||
+ b == '?' ||
+ // This is technically not allowed in a PrintableString.
+ // However, x509 certificates with wildcard strings don't
+ // always use the correct string type so we permit it.
+ b == '*'
+}
+
+// IA5String
+
+// parseIA5String parses a ASN.1 IA5String (ASCII string) from the given
+// byte slice and returns it.
+func parseIA5String(bytes []byte) (ret string, err error) {
+ for _, b := range bytes {
+ if b >= 0x80 {
+ err = SyntaxError{"IA5String contains invalid character"}
+ return
+ }
+ }
+ ret = string(bytes)
+ return
+}
+
+// T61String
+
+// parseT61String parses a ASN.1 T61String (8-bit clean string) from the given
+// byte slice and returns it.
+func parseT61String(bytes []byte) (ret string, err error) {
+ return string(bytes), nil
+}
+
+// UTF8String
+
+// parseUTF8String parses a ASN.1 UTF8String (raw UTF-8) from the given byte
+// array and returns it.
+func parseUTF8String(bytes []byte) (ret string, err error) {
+ return string(bytes), nil
+}
+
+// A RawValue represents an undecoded ASN.1 object.
+type RawValue struct {
+ Class, Tag int
+ IsCompound bool
+ Bytes []byte
+ FullBytes []byte // includes the tag and length
+}
+
+// RawContent is used to signal that the undecoded, DER data needs to be
+// preserved for a struct. To use it, the first field of the struct must have
+// this type. It's an error for any of the other fields to have this type.
+type RawContent []byte
+
+// Tagging
+
+// parseTagAndLength parses an ASN.1 tag and length pair from the given offset
+// into a byte slice. It returns the parsed data and the new offset. SET and
+// SET OF (tag 17) are mapped to SEQUENCE and SEQUENCE OF (tag 16) since we
+// don't distinguish between ordered and unordered objects in this code.
+func parseTagAndLength(bytes []byte, initOffset int) (ret tagAndLength, offset int, err error) {
+ offset = initOffset
+ b := bytes[offset]
+ offset++
+ ret.class = int(b >> 6)
+ ret.isCompound = b&0x20 == 0x20
+ ret.tag = int(b & 0x1f)
+
+ // If the bottom five bits are set, then the tag number is actually base 128
+ // encoded afterwards
+ if ret.tag == 0x1f {
+ ret.tag, offset, err = parseBase128Int(bytes, offset)
+ if err != nil {
+ return
+ }
+ }
+ if offset >= len(bytes) {
+ err = SyntaxError{"truncated tag or length"}
+ return
+ }
+ b = bytes[offset]
+ offset++
+ if b&0x80 == 0 {
+ // The length is encoded in the bottom 7 bits.
+ ret.length = int(b & 0x7f)
+ } else {
+ // Bottom 7 bits give the number of length bytes to follow.
+ numBytes := int(b & 0x7f)
+ // We risk overflowing a signed 32-bit number if we accept more than 3 bytes.
+ if numBytes > 3 {
+ err = StructuralError{"length too large"}
+ return
+ }
+ if numBytes == 0 {
+ err = SyntaxError{"indefinite length found (not DER)"}
+ return
+ }
+ ret.length = 0
+ for i := 0; i < numBytes; i++ {
+ if offset >= len(bytes) {
+ err = SyntaxError{"truncated tag or length"}
+ return
+ }
+ b = bytes[offset]
+ offset++
+ ret.length <<= 8
+ ret.length |= int(b)
+ }
+ }
+
+ return
+}
+
+// parseSequenceOf is used for SEQUENCE OF and SET OF values. It tries to parse
+// a number of ASN.1 values from the given byte slice and returns them as a
+// slice of Go values of the given type.
+func parseSequenceOf(bytes []byte, sliceType reflect.Type, elemType reflect.Type) (ret reflect.Value, err error) {
+ expectedTag, compoundType, ok := getUniversalType(elemType)
+ if !ok {
+ err = StructuralError{"unknown Go type for slice"}
+ return
+ }
+
+ // First we iterate over the input and count the number of elements,
+ // checking that the types are correct in each case.
+ numElements := 0
+ for offset := 0; offset < len(bytes); {
+ var t tagAndLength
+ t, offset, err = parseTagAndLength(bytes, offset)
+ if err != nil {
+ return
+ }
+ // We pretend that GENERAL STRINGs are PRINTABLE STRINGs so
+ // that a sequence of them can be parsed into a []string.
+ if t.tag == tagGeneralString {
+ t.tag = tagPrintableString
+ }
+ if t.class != classUniversal || t.isCompound != compoundType || t.tag != expectedTag {
+ err = StructuralError{"sequence tag mismatch"}
+ return
+ }
+ if invalidLength(offset, t.length, len(bytes)) {
+ err = SyntaxError{"truncated sequence"}
+ return
+ }
+ offset += t.length
+ numElements++
+ }
+ ret = reflect.MakeSlice(sliceType, numElements, numElements)
+ params := fieldParameters{}
+ offset := 0
+ for i := 0; i < numElements; i++ {
+ offset, err = parseField(ret.Index(i), bytes, offset, params)
+ if err != nil {
+ return
+ }
+ }
+ return
+}
+
+var (
+ bitStringType = reflect.TypeOf(BitString{})
+ objectIdentifierType = reflect.TypeOf(ObjectIdentifier{})
+ enumeratedType = reflect.TypeOf(Enumerated(0))
+ flagType = reflect.TypeOf(Flag(false))
+ timeType = reflect.TypeOf(&time.Time{})
+ rawValueType = reflect.TypeOf(RawValue{})
+ rawContentsType = reflect.TypeOf(RawContent(nil))
+ bigIntType = reflect.TypeOf(new(big.Int))
+)
+
+// invalidLength returns true iff offset + length > sliceLength, or if the
+// addition would overflow.
+func invalidLength(offset, length, sliceLength int) bool {
+ return offset+length < offset || offset+length > sliceLength
+}
+
+// parseField is the main parsing function. Given a byte slice and an offset
+// into the array, it will try to parse a suitable ASN.1 value out and store it
+// in the given Value.
+func parseField(v reflect.Value, bytes []byte, initOffset int, params fieldParameters) (offset int, err error) {
+ offset = initOffset
+ fieldType := v.Type()
+
+ // If we have run out of data, it may be that there are optional elements at the end.
+ if offset == len(bytes) {
+ if !setDefaultValue(v, params) {
+ err = SyntaxError{"sequence truncated"}
+ }
+ return
+ }
+
+ // Deal with raw values.
+ if fieldType == rawValueType {
+ var t tagAndLength
+ t, offset, err = parseTagAndLength(bytes, offset)
+ if err != nil {
+ return
+ }
+ if invalidLength(offset, t.length, len(bytes)) {
+ err = SyntaxError{"data truncated"}
+ return
+ }
+ result := RawValue{t.class, t.tag, t.isCompound, bytes[offset : offset+t.length], bytes[initOffset : offset+t.length]}
+ offset += t.length
+ v.Set(reflect.ValueOf(result))
+ return
+ }
+
+ // Deal with the ANY type.
+ if ifaceType := fieldType; ifaceType.Kind() == reflect.Interface && ifaceType.NumMethod() == 0 {
+ var t tagAndLength
+ t, offset, err = parseTagAndLength(bytes, offset)
+ if err != nil {
+ return
+ }
+ if invalidLength(offset, t.length, len(bytes)) {
+ err = SyntaxError{"data truncated"}
+ return
+ }
+ var result interface{}
+ if !t.isCompound && t.class == classUniversal {
+ innerBytes := bytes[offset : offset+t.length]
+ switch t.tag {
+ case tagPrintableString:
+ result, err = parsePrintableString(innerBytes)
+ case tagIA5String:
+ result, err = parseIA5String(innerBytes)
+ case tagT61String:
+ result, err = parseT61String(innerBytes)
+ case tagUTF8String:
+ result, err = parseUTF8String(innerBytes)
+ case tagInteger:
+ result, err = parseInt64(innerBytes)
+ case tagBitString:
+ result, err = parseBitString(innerBytes)
+ case tagOID:
+ result, err = parseObjectIdentifier(innerBytes)
+ case tagUTCTime:
+ result, err = parseUTCTime(innerBytes)
+ case tagOctetString:
+ result = innerBytes
+ default:
+ // If we don't know how to handle the type, we just leave Value as nil.
+ }
+ }
+ offset += t.length
+ if err != nil {
+ return
+ }
+ if result != nil {
+ v.Set(reflect.ValueOf(result))
+ }
+ return
+ }
+ universalTag, compoundType, ok1 := getUniversalType(fieldType)
+ if !ok1 {
+ err = StructuralError{fmt.Sprintf("unknown Go type: %v", fieldType)}
+ return
+ }
+
+ t, offset, err := parseTagAndLength(bytes, offset)
+ if err != nil {
+ return
+ }
+ if params.explicit {
+ expectedClass := classContextSpecific
+ if params.application {
+ expectedClass = classApplication
+ }
+ if t.class == expectedClass && t.tag == *params.tag && (t.length == 0 || t.isCompound) {
+ if t.length > 0 {
+ t, offset, err = parseTagAndLength(bytes, offset)
+ if err != nil {
+ return
+ }
+ } else {
+ if fieldType != flagType {
+ err = StructuralError{"Zero length explicit tag was not an asn1.Flag"}
+ return
+ }
+ v.SetBool(true)
+ return
+ }
+ } else {
+ // The tags didn't match, it might be an optional element.
+ ok := setDefaultValue(v, params)
+ if ok {
+ offset = initOffset
+ } else {
+ err = StructuralError{"explicitly tagged member didn't match"}
+ }
+ return
+ }
+ }
+
+ // Special case for strings: all the ASN.1 string types map to the Go
+ // type string. getUniversalType returns the tag for PrintableString
+ // when it sees a string, so if we see a different string type on the
+ // wire, we change the universal type to match.
+ if universalTag == tagPrintableString {
+ switch t.tag {
+ case tagIA5String, tagGeneralString, tagT61String, tagUTF8String:
+ universalTag = t.tag
+ }
+ }
+
+ // Special case for time: UTCTime and GeneralizedTime both map to the
+ // Go type time.Time.
+ if universalTag == tagUTCTime && t.tag == tagGeneralizedTime {
+ universalTag = tagGeneralizedTime
+ }
+
+ expectedClass := classUniversal
+ expectedTag := universalTag
+
+ if !params.explicit && params.tag != nil {
+ expectedClass = classContextSpecific
+ expectedTag = *params.tag
+ }
+
+ if !params.explicit && params.application && params.tag != nil {
+ expectedClass = classApplication
+ expectedTag = *params.tag
+ }
+
+ // We have unwrapped any explicit tagging at this point.
+ if t.class != expectedClass || t.tag != expectedTag || t.isCompound != compoundType {
+ // Tags don't match. Again, it could be an optional element.
+ ok := setDefaultValue(v, params)
+ if ok {
+ offset = initOffset
+ } else {
+ err = StructuralError{fmt.Sprintf("tags don't match (%d vs %+v) %+v %s @%d", expectedTag, t, params, fieldType.Name(), offset)}
+ }
+ return
+ }
+ if invalidLength(offset, t.length, len(bytes)) {
+ err = SyntaxError{"data truncated"}
+ return
+ }
+ innerBytes := bytes[offset : offset+t.length]
+ offset += t.length
+
+ // We deal with the structures defined in this package first.
+ switch fieldType {
+ case objectIdentifierType:
+ newSlice, err1 := parseObjectIdentifier(innerBytes)
+ v.Set(reflect.MakeSlice(v.Type(), len(newSlice), len(newSlice)))
+ if err1 == nil {
+ reflect.Copy(v, reflect.ValueOf(newSlice))
+ }
+ err = err1
+ return
+ case bitStringType:
+ bs, err1 := parseBitString(innerBytes)
+ if err1 == nil {
+ v.Set(reflect.ValueOf(bs))
+ }
+ err = err1
+ return
+ case timeType:
+ var time *time.Time
+ var err1 error
+ if universalTag == tagUTCTime {
+ time, err1 = parseUTCTime(innerBytes)
+ } else {
+ time, err1 = parseGeneralizedTime(innerBytes)
+ }
+ if err1 == nil {
+ v.Set(reflect.ValueOf(time))
+ }
+ err = err1
+ return
+ case enumeratedType:
+ parsedInt, err1 := parseInt(innerBytes)
+ if err1 == nil {
+ v.SetInt(int64(parsedInt))
+ }
+ err = err1
+ return
+ case flagType:
+ v.SetBool(true)
+ return
+ case bigIntType:
+ parsedInt := parseBigInt(innerBytes)
+ v.Set(reflect.ValueOf(parsedInt))
+ return
+ }
+ switch val := v; val.Kind() {
+ case reflect.Bool:
+ parsedBool, err1 := parseBool(innerBytes)
+ if err1 == nil {
+ val.SetBool(parsedBool)
+ }
+ err = err1
+ return
+ case reflect.Int, reflect.Int32:
+ parsedInt, err1 := parseInt(innerBytes)
+ if err1 == nil {
+ val.SetInt(int64(parsedInt))
+ }
+ err = err1
+ return
+ case reflect.Int64:
+ parsedInt, err1 := parseInt64(innerBytes)
+ if err1 == nil {
+ val.SetInt(parsedInt)
+ }
+ err = err1
+ return
+ // TODO(dfc) Add support for the remaining integer types
+ case reflect.Struct:
+ structType := fieldType
+
+ if structType.NumField() > 0 &&
+ structType.Field(0).Type == rawContentsType {
+ bytes := bytes[initOffset:offset]
+ val.Field(0).Set(reflect.ValueOf(RawContent(bytes)))
+ }
+
+ innerOffset := 0
+ for i := 0; i < structType.NumField(); i++ {
+ field := structType.Field(i)
+ if i == 0 && field.Type == rawContentsType {
+ continue
+ }
+ innerOffset, err = parseField(val.Field(i), innerBytes, innerOffset, parseFieldParameters(field.Tag.Get("asn1")))
+ if err != nil {
+ return
+ }
+ }
+ // We allow extra bytes at the end of the SEQUENCE because
+ // adding elements to the end has been used in X.509 as the
+ // version numbers have increased.
+ return
+ case reflect.Slice:
+ sliceType := fieldType
+ if sliceType.Elem().Kind() == reflect.Uint8 {
+ val.Set(reflect.MakeSlice(sliceType, len(innerBytes), len(innerBytes)))
+ reflect.Copy(val, reflect.ValueOf(innerBytes))
+ return
+ }
+ newSlice, err1 := parseSequenceOf(innerBytes, sliceType, sliceType.Elem())
+ if err1 == nil {
+ val.Set(newSlice)
+ }
+ err = err1
+ return
+ case reflect.String:
+ var v string
+ switch universalTag {
+ case tagPrintableString:
+ v, err = parsePrintableString(innerBytes)
+ case tagIA5String:
+ v, err = parseIA5String(innerBytes)
+ case tagT61String:
+ v, err = parseT61String(innerBytes)
+ case tagUTF8String:
+ v, err = parseUTF8String(innerBytes)
+ case tagGeneralString:
+ // GeneralString is specified in ISO-2022/ECMA-35,
+ // A brief review suggests that it includes structures
+ // that allow the encoding to change midstring and
+ // such. We give up and pass it as an 8-bit string.
+ v, err = parseT61String(innerBytes)
+ default:
+ err = SyntaxError{fmt.Sprintf("internal error: unknown string type %d", universalTag)}
+ }
+ if err == nil {
+ val.SetString(v)
+ }
+ return
+ }
+ err = StructuralError{"unsupported: " + v.Type().String()}
+ return
+}
+
+// setDefaultValue is used to install a default value, from a tag string, into
+// a Value. It is successful is the field was optional, even if a default value
+// wasn't provided or it failed to install it into the Value.
+func setDefaultValue(v reflect.Value, params fieldParameters) (ok bool) {
+ if !params.optional {
+ return
+ }
+ ok = true
+ if params.defaultValue == nil {
+ return
+ }
+ switch val := v; val.Kind() {
+ case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+ val.SetInt(*params.defaultValue)
+ }
+ return
+}
+
+// Unmarshal parses the DER-encoded ASN.1 data structure b
+// and uses the reflect package to fill in an arbitrary value pointed at by val.
+// Because Unmarshal uses the reflect package, the structs
+// being written to must use upper case field names.
+//
+// An ASN.1 INTEGER can be written to an int, int32 or int64.
+// If the encoded value does not fit in the Go type,
+// Unmarshal returns a parse error.
+//
+// An ASN.1 BIT STRING can be written to a BitString.
+//
+// An ASN.1 OCTET STRING can be written to a []byte.
+//
+// An ASN.1 OBJECT IDENTIFIER can be written to an
+// ObjectIdentifier.
+//
+// An ASN.1 ENUMERATED can be written to an Enumerated.
+//
+// An ASN.1 UTCTIME or GENERALIZEDTIME can be written to a *time.Time.
+//
+// An ASN.1 PrintableString or IA5String can be written to a string.
+//
+// Any of the above ASN.1 values can be written to an interface{}.
+// The value stored in the interface has the corresponding Go type.
+// For integers, that type is int64.
+//
+// An ASN.1 SEQUENCE OF x or SET OF x can be written
+// to a slice if an x can be written to the slice's element type.
+//
+// An ASN.1 SEQUENCE or SET can be written to a struct
+// if each of the elements in the sequence can be
+// written to the corresponding element in the struct.
+//
+// The following tags on struct fields have special meaning to Unmarshal:
+//
+// optional marks the field as ASN.1 OPTIONAL
+// [explicit] tag:x specifies the ASN.1 tag number; implies ASN.1 CONTEXT SPECIFIC
+// default:x sets the default value for optional integer fields
+//
+// If the type of the first field of a structure is RawContent then the raw
+// ASN1 contents of the struct will be stored in it.
+//
+// Other ASN.1 types are not supported; if it encounters them,
+// Unmarshal returns a parse error.
+func Unmarshal(b []byte, val interface{}) (rest []byte, err error) {
+ return UnmarshalWithParams(b, val, "")
+}
+
+// UnmarshalWithParams allows field parameters to be specified for the
+// top-level element. The form of the params is the same as the field tags.
+func UnmarshalWithParams(b []byte, val interface{}, params string) (rest []byte, err error) {
+ v := reflect.ValueOf(val).Elem()
+ offset, err := parseField(v, b, 0, parseFieldParameters(params))
+ if err != nil {
+ return nil, err
+ }
+ return b[offset:], nil
+}
diff --git a/libgo/go/encoding/asn1/asn1_test.go b/libgo/go/encoding/asn1/asn1_test.go
new file mode 100644
index 0000000..1c529bd
--- /dev/null
+++ b/libgo/go/encoding/asn1/asn1_test.go
@@ -0,0 +1,689 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package asn1
+
+import (
+ "bytes"
+ "reflect"
+ "testing"
+ "time"
+)
+
+type int64Test struct {
+ in []byte
+ ok bool
+ out int64
+}
+
+var int64TestData = []int64Test{
+ {[]byte{0x00}, true, 0},
+ {[]byte{0x7f}, true, 127},
+ {[]byte{0x00, 0x80}, true, 128},
+ {[]byte{0x01, 0x00}, true, 256},
+ {[]byte{0x80}, true, -128},
+ {[]byte{0xff, 0x7f}, true, -129},
+ {[]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, true, -1},
+ {[]byte{0xff}, true, -1},
+ {[]byte{0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, true, -9223372036854775808},
+ {[]byte{0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, false, 0},
+}
+
+func TestParseInt64(t *testing.T) {
+ for i, test := range int64TestData {
+ ret, err := parseInt64(test.in)
+ if (err == nil) != test.ok {
+ t.Errorf("#%d: Incorrect error result (did fail? %v, expected: %v)", i, err == nil, test.ok)
+ }
+ if test.ok && ret != test.out {
+ t.Errorf("#%d: Bad result: %v (expected %v)", i, ret, test.out)
+ }
+ }
+}
+
+type int32Test struct {
+ in []byte
+ ok bool
+ out int32
+}
+
+var int32TestData = []int32Test{
+ {[]byte{0x00}, true, 0},
+ {[]byte{0x7f}, true, 127},
+ {[]byte{0x00, 0x80}, true, 128},
+ {[]byte{0x01, 0x00}, true, 256},
+ {[]byte{0x80}, true, -128},
+ {[]byte{0xff, 0x7f}, true, -129},
+ {[]byte{0xff, 0xff, 0xff, 0xff}, true, -1},
+ {[]byte{0xff}, true, -1},
+ {[]byte{0x80, 0x00, 0x00, 0x00}, true, -2147483648},
+ {[]byte{0x80, 0x00, 0x00, 0x00, 0x00}, false, 0},
+}
+
+func TestParseInt32(t *testing.T) {
+ for i, test := range int32TestData {
+ ret, err := parseInt(test.in)
+ if (err == nil) != test.ok {
+ t.Errorf("#%d: Incorrect error result (did fail? %v, expected: %v)", i, err == nil, test.ok)
+ }
+ if test.ok && int32(ret) != test.out {
+ t.Errorf("#%d: Bad result: %v (expected %v)", i, ret, test.out)
+ }
+ }
+}
+
+var bigIntTests = []struct {
+ in []byte
+ base10 string
+}{
+ {[]byte{0xff}, "-1"},
+ {[]byte{0x00}, "0"},
+ {[]byte{0x01}, "1"},
+ {[]byte{0x00, 0xff}, "255"},
+ {[]byte{0xff, 0x00}, "-256"},
+ {[]byte{0x01, 0x00}, "256"},
+}
+
+func TestParseBigInt(t *testing.T) {
+ for i, test := range bigIntTests {
+ ret := parseBigInt(test.in)
+ if ret.String() != test.base10 {
+ t.Errorf("#%d: bad result from %x, got %s want %s", i, test.in, ret.String(), test.base10)
+ }
+ fw := newForkableWriter()
+ marshalBigInt(fw, ret)
+ result := fw.Bytes()
+ if !bytes.Equal(result, test.in) {
+ t.Errorf("#%d: got %x from marshaling %s, want %x", i, result, ret, test.in)
+ }
+ }
+}
+
+type bitStringTest struct {
+ in []byte
+ ok bool
+ out []byte
+ bitLength int
+}
+
+var bitStringTestData = []bitStringTest{
+ {[]byte{}, false, []byte{}, 0},
+ {[]byte{0x00}, true, []byte{}, 0},
+ {[]byte{0x07, 0x00}, true, []byte{0x00}, 1},
+ {[]byte{0x07, 0x01}, false, []byte{}, 0},
+ {[]byte{0x07, 0x40}, false, []byte{}, 0},
+ {[]byte{0x08, 0x00}, false, []byte{}, 0},
+}
+
+func TestBitString(t *testing.T) {
+ for i, test := range bitStringTestData {
+ ret, err := parseBitString(test.in)
+ if (err == nil) != test.ok {
+ t.Errorf("#%d: Incorrect error result (did fail? %v, expected: %v)", i, err == nil, test.ok)
+ }
+ if err == nil {
+ if test.bitLength != ret.BitLength || bytes.Compare(ret.Bytes, test.out) != 0 {
+ t.Errorf("#%d: Bad result: %v (expected %v %v)", i, ret, test.out, test.bitLength)
+ }
+ }
+ }
+}
+
+func TestBitStringAt(t *testing.T) {
+ bs := BitString{[]byte{0x82, 0x40}, 16}
+ if bs.At(0) != 1 {
+ t.Error("#1: Failed")
+ }
+ if bs.At(1) != 0 {
+ t.Error("#2: Failed")
+ }
+ if bs.At(6) != 1 {
+ t.Error("#3: Failed")
+ }
+ if bs.At(9) != 1 {
+ t.Error("#4: Failed")
+ }
+}
+
+type bitStringRightAlignTest struct {
+ in []byte
+ inlen int
+ out []byte
+}
+
+var bitStringRightAlignTests = []bitStringRightAlignTest{
+ {[]byte{0x80}, 1, []byte{0x01}},
+ {[]byte{0x80, 0x80}, 9, []byte{0x01, 0x01}},
+ {[]byte{}, 0, []byte{}},
+ {[]byte{0xce}, 8, []byte{0xce}},
+ {[]byte{0xce, 0x47}, 16, []byte{0xce, 0x47}},
+ {[]byte{0x34, 0x50}, 12, []byte{0x03, 0x45}},
+}
+
+func TestBitStringRightAlign(t *testing.T) {
+ for i, test := range bitStringRightAlignTests {
+ bs := BitString{test.in, test.inlen}
+ out := bs.RightAlign()
+ if bytes.Compare(out, test.out) != 0 {
+ t.Errorf("#%d got: %x want: %x", i, out, test.out)
+ }
+ }
+}
+
+type objectIdentifierTest struct {
+ in []byte
+ ok bool
+ out []int
+}
+
+var objectIdentifierTestData = []objectIdentifierTest{
+ {[]byte{}, false, []int{}},
+ {[]byte{85}, true, []int{2, 5}},
+ {[]byte{85, 0x02}, true, []int{2, 5, 2}},
+ {[]byte{85, 0x02, 0xc0, 0x00}, true, []int{2, 5, 2, 0x2000}},
+ {[]byte{85, 0x02, 0xc0, 0x80, 0x80, 0x80, 0x80}, false, []int{}},
+}
+
+func TestObjectIdentifier(t *testing.T) {
+ for i, test := range objectIdentifierTestData {
+ ret, err := parseObjectIdentifier(test.in)
+ if (err == nil) != test.ok {
+ t.Errorf("#%d: Incorrect error result (did fail? %v, expected: %v)", i, err == nil, test.ok)
+ }
+ if err == nil {
+ if !reflect.DeepEqual(test.out, ret) {
+ t.Errorf("#%d: Bad result: %v (expected %v)", i, ret, test.out)
+ }
+ }
+ }
+}
+
+type timeTest struct {
+ in string
+ ok bool
+ out *time.Time
+}
+
+var utcTestData = []timeTest{
+ {"910506164540-0700", true, &time.Time{1991, 05, 06, 16, 45, 40, 0, -7 * 60 * 60, ""}},
+ {"910506164540+0730", true, &time.Time{1991, 05, 06, 16, 45, 40, 0, 7*60*60 + 30*60, ""}},
+ {"910506234540Z", true, &time.Time{1991, 05, 06, 23, 45, 40, 0, 0, "UTC"}},
+ {"9105062345Z", true, &time.Time{1991, 05, 06, 23, 45, 0, 0, 0, "UTC"}},
+ {"a10506234540Z", false, nil},
+ {"91a506234540Z", false, nil},
+ {"9105a6234540Z", false, nil},
+ {"910506a34540Z", false, nil},
+ {"910506334a40Z", false, nil},
+ {"91050633444aZ", false, nil},
+ {"910506334461Z", false, nil},
+ {"910506334400Za", false, nil},
+}
+
+func TestUTCTime(t *testing.T) {
+ for i, test := range utcTestData {
+ ret, err := parseUTCTime([]byte(test.in))
+ if (err == nil) != test.ok {
+ t.Errorf("#%d: Incorrect error result (did fail? %v, expected: %v)", i, err == nil, test.ok)
+ }
+ if err == nil {
+ if !reflect.DeepEqual(test.out, ret) {
+ t.Errorf("#%d: Bad result: %v (expected %v)", i, ret, test.out)
+ }
+ }
+ }
+}
+
+var generalizedTimeTestData = []timeTest{
+ {"20100102030405Z", true, &time.Time{2010, 01, 02, 03, 04, 05, 0, 0, "UTC"}},
+ {"20100102030405", false, nil},
+ {"20100102030405+0607", true, &time.Time{2010, 01, 02, 03, 04, 05, 0, 6*60*60 + 7*60, ""}},
+ {"20100102030405-0607", true, &time.Time{2010, 01, 02, 03, 04, 05, 0, -6*60*60 - 7*60, ""}},
+}
+
+func TestGeneralizedTime(t *testing.T) {
+ for i, test := range generalizedTimeTestData {
+ ret, err := parseGeneralizedTime([]byte(test.in))
+ if (err == nil) != test.ok {
+ t.Errorf("#%d: Incorrect error result (did fail? %v, expected: %v)", i, err == nil, test.ok)
+ }
+ if err == nil {
+ if !reflect.DeepEqual(test.out, ret) {
+ t.Errorf("#%d: Bad result: %v (expected %v)", i, ret, test.out)
+ }
+ }
+ }
+}
+
+type tagAndLengthTest struct {
+ in []byte
+ ok bool
+ out tagAndLength
+}
+
+var tagAndLengthData = []tagAndLengthTest{
+ {[]byte{0x80, 0x01}, true, tagAndLength{2, 0, 1, false}},
+ {[]byte{0xa0, 0x01}, true, tagAndLength{2, 0, 1, true}},
+ {[]byte{0x02, 0x00}, true, tagAndLength{0, 2, 0, false}},
+ {[]byte{0xfe, 0x00}, true, tagAndLength{3, 30, 0, true}},
+ {[]byte{0x1f, 0x01, 0x00}, true, tagAndLength{0, 1, 0, false}},
+ {[]byte{0x1f, 0x81, 0x00, 0x00}, true, tagAndLength{0, 128, 0, false}},
+ {[]byte{0x1f, 0x81, 0x80, 0x01, 0x00}, true, tagAndLength{0, 0x4001, 0, false}},
+ {[]byte{0x00, 0x81, 0x01}, true, tagAndLength{0, 0, 1, false}},
+ {[]byte{0x00, 0x82, 0x01, 0x00}, true, tagAndLength{0, 0, 256, false}},
+ {[]byte{0x00, 0x83, 0x01, 0x00}, false, tagAndLength{}},
+ {[]byte{0x1f, 0x85}, false, tagAndLength{}},
+ {[]byte{0x30, 0x80}, false, tagAndLength{}},
+}
+
+func TestParseTagAndLength(t *testing.T) {
+ for i, test := range tagAndLengthData {
+ tagAndLength, _, err := parseTagAndLength(test.in, 0)
+ if (err == nil) != test.ok {
+ t.Errorf("#%d: Incorrect error result (did pass? %v, expected: %v)", i, err == nil, test.ok)
+ }
+ if err == nil && !reflect.DeepEqual(test.out, tagAndLength) {
+ t.Errorf("#%d: Bad result: %v (expected %v)", i, tagAndLength, test.out)
+ }
+ }
+}
+
+type parseFieldParametersTest struct {
+ in string
+ out fieldParameters
+}
+
+func newInt(n int) *int { return &n }
+
+func newInt64(n int64) *int64 { return &n }
+
+func newString(s string) *string { return &s }
+
+func newBool(b bool) *bool { return &b }
+
+var parseFieldParametersTestData []parseFieldParametersTest = []parseFieldParametersTest{
+ {"", fieldParameters{}},
+ {"ia5", fieldParameters{stringType: tagIA5String}},
+ {"printable", fieldParameters{stringType: tagPrintableString}},
+ {"optional", fieldParameters{optional: true}},
+ {"explicit", fieldParameters{explicit: true, tag: new(int)}},
+ {"application", fieldParameters{application: true, tag: new(int)}},
+ {"optional,explicit", fieldParameters{optional: true, explicit: true, tag: new(int)}},
+ {"default:42", fieldParameters{defaultValue: newInt64(42)}},
+ {"tag:17", fieldParameters{tag: newInt(17)}},
+ {"optional,explicit,default:42,tag:17", fieldParameters{optional: true, explicit: true, defaultValue: newInt64(42), tag: newInt(17)}},
+ {"optional,explicit,default:42,tag:17,rubbish1", fieldParameters{true, true, false, newInt64(42), newInt(17), 0, false}},
+ {"set", fieldParameters{set: true}},
+}
+
+func TestParseFieldParameters(t *testing.T) {
+ for i, test := range parseFieldParametersTestData {
+ f := parseFieldParameters(test.in)
+ if !reflect.DeepEqual(f, test.out) {
+ t.Errorf("#%d: Bad result: %v (expected %v)", i, f, test.out)
+ }
+ }
+}
+
+type TestObjectIdentifierStruct struct {
+ OID ObjectIdentifier
+}
+
+type TestContextSpecificTags struct {
+ A int `asn1:"tag:1"`
+}
+
+type TestContextSpecificTags2 struct {
+ A int `asn1:"explicit,tag:1"`
+ B int
+}
+
+type TestElementsAfterString struct {
+ S string
+ A, B int
+}
+
+var unmarshalTestData = []struct {
+ in []byte
+ out interface{}
+}{
+ {[]byte{0x02, 0x01, 0x42}, newInt(0x42)},
+ {[]byte{0x30, 0x08, 0x06, 0x06, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d}, &TestObjectIdentifierStruct{[]int{1, 2, 840, 113549}}},
+ {[]byte{0x03, 0x04, 0x06, 0x6e, 0x5d, 0xc0}, &BitString{[]byte{110, 93, 192}, 18}},
+ {[]byte{0x30, 0x09, 0x02, 0x01, 0x01, 0x02, 0x01, 0x02, 0x02, 0x01, 0x03}, &[]int{1, 2, 3}},
+ {[]byte{0x02, 0x01, 0x10}, newInt(16)},
+ {[]byte{0x13, 0x04, 't', 'e', 's', 't'}, newString("test")},
+ {[]byte{0x16, 0x04, 't', 'e', 's', 't'}, newString("test")},
+ {[]byte{0x16, 0x04, 't', 'e', 's', 't'}, &RawValue{0, 22, false, []byte("test"), []byte("\x16\x04test")}},
+ {[]byte{0x04, 0x04, 1, 2, 3, 4}, &RawValue{0, 4, false, []byte{1, 2, 3, 4}, []byte{4, 4, 1, 2, 3, 4}}},
+ {[]byte{0x30, 0x03, 0x81, 0x01, 0x01}, &TestContextSpecificTags{1}},
+ {[]byte{0x30, 0x08, 0xa1, 0x03, 0x02, 0x01, 0x01, 0x02, 0x01, 0x02}, &TestContextSpecificTags2{1, 2}},
+ {[]byte{0x01, 0x01, 0x00}, newBool(false)},
+ {[]byte{0x01, 0x01, 0x01}, newBool(true)},
+ {[]byte{0x30, 0x0b, 0x13, 0x03, 0x66, 0x6f, 0x6f, 0x02, 0x01, 0x22, 0x02, 0x01, 0x33}, &TestElementsAfterString{"foo", 0x22, 0x33}},
+}
+
+func TestUnmarshal(t *testing.T) {
+ for i, test := range unmarshalTestData {
+ pv := reflect.New(reflect.TypeOf(test.out).Elem())
+ val := pv.Interface()
+ _, err := Unmarshal(test.in, val)
+ if err != nil {
+ t.Errorf("Unmarshal failed at index %d %v", i, err)
+ }
+ if !reflect.DeepEqual(val, test.out) {
+ t.Errorf("#%d:\nhave %#v\nwant %#v", i, val, test.out)
+ }
+ }
+}
+
+type Certificate struct {
+ TBSCertificate TBSCertificate
+ SignatureAlgorithm AlgorithmIdentifier
+ SignatureValue BitString
+}
+
+type TBSCertificate struct {
+ Version int `asn1:"optional,explicit,default:0,tag:0"`
+ SerialNumber RawValue
+ SignatureAlgorithm AlgorithmIdentifier
+ Issuer RDNSequence
+ Validity Validity
+ Subject RDNSequence
+ PublicKey PublicKeyInfo
+}
+
+type AlgorithmIdentifier struct {
+ Algorithm ObjectIdentifier
+}
+
+type RDNSequence []RelativeDistinguishedNameSET
+
+type RelativeDistinguishedNameSET []AttributeTypeAndValue
+
+type AttributeTypeAndValue struct {
+ Type ObjectIdentifier
+ Value interface{}
+}
+
+type Validity struct {
+ NotBefore, NotAfter *time.Time
+}
+
+type PublicKeyInfo struct {
+ Algorithm AlgorithmIdentifier
+ PublicKey BitString
+}
+
+func TestCertificate(t *testing.T) {
+ // This is a minimal, self-signed certificate that should parse correctly.
+ var cert Certificate
+ if _, err := Unmarshal(derEncodedSelfSignedCertBytes, &cert); err != nil {
+ t.Errorf("Unmarshal failed: %v", err)
+ }
+ if !reflect.DeepEqual(cert, derEncodedSelfSignedCert) {
+ t.Errorf("Bad result:\ngot: %+v\nwant: %+v", cert, derEncodedSelfSignedCert)
+ }
+}
+
+func TestCertificateWithNUL(t *testing.T) {
+ // This is the paypal NUL-hack certificate. It should fail to parse because
+ // NUL isn't a permitted character in a PrintableString.
+
+ var cert Certificate
+ if _, err := Unmarshal(derEncodedPaypalNULCertBytes, &cert); err == nil {
+ t.Error("Unmarshal succeeded, should not have")
+ }
+}
+
+type rawStructTest struct {
+ Raw RawContent
+ A int
+}
+
+func TestRawStructs(t *testing.T) {
+ var s rawStructTest
+ input := []byte{0x30, 0x03, 0x02, 0x01, 0x50}
+
+ rest, err := Unmarshal(input, &s)
+ if len(rest) != 0 {
+ t.Errorf("incomplete parse: %x", rest)
+ return
+ }
+ if err != nil {
+ t.Error(err)
+ return
+ }
+ if s.A != 0x50 {
+ t.Errorf("bad value for A: got %d want %d", s.A, 0x50)
+ }
+ if bytes.Compare([]byte(s.Raw), input) != 0 {
+ t.Errorf("bad value for Raw: got %x want %x", s.Raw, input)
+ }
+}
+
+var derEncodedSelfSignedCert = Certificate{
+ TBSCertificate: TBSCertificate{
+ Version: 0,
+ SerialNumber: RawValue{Class: 0, Tag: 2, IsCompound: false, Bytes: []uint8{0x0, 0x8c, 0xc3, 0x37, 0x92, 0x10, 0xec, 0x2c, 0x98}, FullBytes: []byte{2, 9, 0x0, 0x8c, 0xc3, 0x37, 0x92, 0x10, 0xec, 0x2c, 0x98}},
+ SignatureAlgorithm: AlgorithmIdentifier{Algorithm: ObjectIdentifier{1, 2, 840, 113549, 1, 1, 5}},
+ Issuer: RDNSequence{
+ RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 6}, Value: "XX"}},
+ RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 8}, Value: "Some-State"}},
+ RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 7}, Value: "City"}},
+ RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 10}, Value: "Internet Widgits Pty Ltd"}},
+ RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 3}, Value: "false.example.com"}},
+ RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{1, 2, 840, 113549, 1, 9, 1}, Value: "false@example.com"}},
+ },
+ Validity: Validity{NotBefore: &time.Time{Year: 2009, Month: 10, Day: 8, Hour: 0, Minute: 25, Second: 53, ZoneOffset: 0, Zone: "UTC"}, NotAfter: &time.Time{Year: 2010, Month: 10, Day: 8, Hour: 0, Minute: 25, Second: 53, ZoneOffset: 0, Zone: "UTC"}},
+ Subject: RDNSequence{
+ RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 6}, Value: "XX"}},
+ RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 8}, Value: "Some-State"}},
+ RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 7}, Value: "City"}},
+ RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 10}, Value: "Internet Widgits Pty Ltd"}},
+ RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 3}, Value: "false.example.com"}},
+ RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{1, 2, 840, 113549, 1, 9, 1}, Value: "false@example.com"}},
+ },
+ PublicKey: PublicKeyInfo{
+ Algorithm: AlgorithmIdentifier{Algorithm: ObjectIdentifier{1, 2, 840, 113549, 1, 1, 1}},
+ PublicKey: BitString{
+ Bytes: []uint8{
+ 0x30, 0x48, 0x2, 0x41, 0x0, 0xcd, 0xb7,
+ 0x63, 0x9c, 0x32, 0x78, 0xf0, 0x6, 0xaa, 0x27, 0x7f, 0x6e, 0xaf, 0x42,
+ 0x90, 0x2b, 0x59, 0x2d, 0x8c, 0xbc, 0xbe, 0x38, 0xa1, 0xc9, 0x2b, 0xa4,
+ 0x69, 0x5a, 0x33, 0x1b, 0x1d, 0xea, 0xde, 0xad, 0xd8, 0xe9, 0xa5, 0xc2,
+ 0x7e, 0x8c, 0x4c, 0x2f, 0xd0, 0xa8, 0x88, 0x96, 0x57, 0x72, 0x2a, 0x4f,
+ 0x2a, 0xf7, 0x58, 0x9c, 0xf2, 0xc7, 0x70, 0x45, 0xdc, 0x8f, 0xde, 0xec,
+ 0x35, 0x7d, 0x2, 0x3, 0x1, 0x0, 0x1,
+ },
+ BitLength: 592,
+ },
+ },
+ },
+ SignatureAlgorithm: AlgorithmIdentifier{Algorithm: ObjectIdentifier{1, 2, 840, 113549, 1, 1, 5}},
+ SignatureValue: BitString{
+ Bytes: []uint8{
+ 0xa6, 0x7b, 0x6, 0xec, 0x5e, 0xce,
+ 0x92, 0x77, 0x2c, 0xa4, 0x13, 0xcb, 0xa3, 0xca, 0x12, 0x56, 0x8f, 0xdc, 0x6c,
+ 0x7b, 0x45, 0x11, 0xcd, 0x40, 0xa7, 0xf6, 0x59, 0x98, 0x4, 0x2, 0xdf, 0x2b,
+ 0x99, 0x8b, 0xb9, 0xa4, 0xa8, 0xcb, 0xeb, 0x34, 0xc0, 0xf0, 0xa7, 0x8c, 0xf8,
+ 0xd9, 0x1e, 0xde, 0x14, 0xa5, 0xed, 0x76, 0xbf, 0x11, 0x6f, 0xe3, 0x60, 0xaa,
+ 0xfa, 0x88, 0x21, 0x49, 0x4, 0x35,
+ },
+ BitLength: 512,
+ },
+}
+
+var derEncodedSelfSignedCertBytes = []byte{
+ 0x30, 0x82, 0x02, 0x18, 0x30,
+ 0x82, 0x01, 0xc2, 0x02, 0x09, 0x00, 0x8c, 0xc3, 0x37, 0x92, 0x10, 0xec, 0x2c,
+ 0x98, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01,
+ 0x05, 0x05, 0x00, 0x30, 0x81, 0x92, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55,
+ 0x04, 0x06, 0x13, 0x02, 0x58, 0x58, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55,
+ 0x04, 0x08, 0x13, 0x0a, 0x53, 0x6f, 0x6d, 0x65, 0x2d, 0x53, 0x74, 0x61, 0x74,
+ 0x65, 0x31, 0x0d, 0x30, 0x0b, 0x06, 0x03, 0x55, 0x04, 0x07, 0x13, 0x04, 0x43,
+ 0x69, 0x74, 0x79, 0x31, 0x21, 0x30, 0x1f, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x13,
+ 0x18, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x20, 0x57, 0x69, 0x64,
+ 0x67, 0x69, 0x74, 0x73, 0x20, 0x50, 0x74, 0x79, 0x20, 0x4c, 0x74, 0x64, 0x31,
+ 0x1a, 0x30, 0x18, 0x06, 0x03, 0x55, 0x04, 0x03, 0x13, 0x11, 0x66, 0x61, 0x6c,
+ 0x73, 0x65, 0x2e, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x2e, 0x63, 0x6f,
+ 0x6d, 0x31, 0x20, 0x30, 0x1e, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d,
+ 0x01, 0x09, 0x01, 0x16, 0x11, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x40, 0x65, 0x78,
+ 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x2e, 0x63, 0x6f, 0x6d, 0x30, 0x1e, 0x17, 0x0d,
+ 0x30, 0x39, 0x31, 0x30, 0x30, 0x38, 0x30, 0x30, 0x32, 0x35, 0x35, 0x33, 0x5a,
+ 0x17, 0x0d, 0x31, 0x30, 0x31, 0x30, 0x30, 0x38, 0x30, 0x30, 0x32, 0x35, 0x35,
+ 0x33, 0x5a, 0x30, 0x81, 0x92, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04,
+ 0x06, 0x13, 0x02, 0x58, 0x58, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04,
+ 0x08, 0x13, 0x0a, 0x53, 0x6f, 0x6d, 0x65, 0x2d, 0x53, 0x74, 0x61, 0x74, 0x65,
+ 0x31, 0x0d, 0x30, 0x0b, 0x06, 0x03, 0x55, 0x04, 0x07, 0x13, 0x04, 0x43, 0x69,
+ 0x74, 0x79, 0x31, 0x21, 0x30, 0x1f, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x13, 0x18,
+ 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x20, 0x57, 0x69, 0x64, 0x67,
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+ 0x30, 0x18, 0x06, 0x03, 0x55, 0x04, 0x03, 0x13, 0x11, 0x66, 0x61, 0x6c, 0x73,
+ 0x65, 0x2e, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x2e, 0x63, 0x6f, 0x6d,
+ 0x31, 0x20, 0x30, 0x1e, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01,
+ 0x09, 0x01, 0x16, 0x11, 0x66, 0x61, 0x6c, 0x73, 0x65, 0x40, 0x65, 0x78, 0x61,
+ 0x6d, 0x70, 0x6c, 0x65, 0x2e, 0x63, 0x6f, 0x6d, 0x30, 0x5c, 0x30, 0x0d, 0x06,
+ 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01, 0x05, 0x00, 0x03,
+ 0x4b, 0x00, 0x30, 0x48, 0x02, 0x41, 0x00, 0xcd, 0xb7, 0x63, 0x9c, 0x32, 0x78,
+ 0xf0, 0x06, 0xaa, 0x27, 0x7f, 0x6e, 0xaf, 0x42, 0x90, 0x2b, 0x59, 0x2d, 0x8c,
+ 0xbc, 0xbe, 0x38, 0xa1, 0xc9, 0x2b, 0xa4, 0x69, 0x5a, 0x33, 0x1b, 0x1d, 0xea,
+ 0xde, 0xad, 0xd8, 0xe9, 0xa5, 0xc2, 0x7e, 0x8c, 0x4c, 0x2f, 0xd0, 0xa8, 0x88,
+ 0x96, 0x57, 0x72, 0x2a, 0x4f, 0x2a, 0xf7, 0x58, 0x9c, 0xf2, 0xc7, 0x70, 0x45,
+ 0xdc, 0x8f, 0xde, 0xec, 0x35, 0x7d, 0x02, 0x03, 0x01, 0x00, 0x01, 0x30, 0x0d,
+ 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 0x00,
+ 0x03, 0x41, 0x00, 0xa6, 0x7b, 0x06, 0xec, 0x5e, 0xce, 0x92, 0x77, 0x2c, 0xa4,
+ 0x13, 0xcb, 0xa3, 0xca, 0x12, 0x56, 0x8f, 0xdc, 0x6c, 0x7b, 0x45, 0x11, 0xcd,
+ 0x40, 0xa7, 0xf6, 0x59, 0x98, 0x04, 0x02, 0xdf, 0x2b, 0x99, 0x8b, 0xb9, 0xa4,
+ 0xa8, 0xcb, 0xeb, 0x34, 0xc0, 0xf0, 0xa7, 0x8c, 0xf8, 0xd9, 0x1e, 0xde, 0x14,
+ 0xa5, 0xed, 0x76, 0xbf, 0x11, 0x6f, 0xe3, 0x60, 0xaa, 0xfa, 0x88, 0x21, 0x49,
+ 0x04, 0x35,
+}
+
+var derEncodedPaypalNULCertBytes = []byte{
+ 0x30, 0x82, 0x06, 0x44, 0x30,
+ 0x82, 0x05, 0xad, 0xa0, 0x03, 0x02, 0x01, 0x02, 0x02, 0x03, 0x00, 0xf0, 0x9b,
+ 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x05,
+ 0x05, 0x00, 0x30, 0x82, 0x01, 0x12, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55,
+ 0x04, 0x06, 0x13, 0x02, 0x45, 0x53, 0x31, 0x12, 0x30, 0x10, 0x06, 0x03, 0x55,
+ 0x04, 0x08, 0x13, 0x09, 0x42, 0x61, 0x72, 0x63, 0x65, 0x6c, 0x6f, 0x6e, 0x61,
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+ 0xb2, 0xc4, 0x6d, 0xb4, 0x54, 0xf8, 0x8b, 0x8a, 0xcc, 0xdb, 0x72, 0xc2, 0x9e,
+ 0x3c, 0x60, 0xb9, 0xc6, 0x91, 0x3d, 0x82, 0xb7, 0x7d, 0x99, 0xff, 0xd1, 0x29,
+ 0x84, 0xc1, 0x73, 0x53, 0x9c, 0x82, 0xdd, 0xfc, 0x24, 0x8c, 0x77, 0xd5, 0x41,
+ 0xf3, 0xe8, 0x1e, 0x42, 0xa1, 0xad, 0x2d, 0x9e, 0xff, 0x5b, 0x10, 0x26, 0xce,
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+ 0x3f, 0x8b, 0x05, 0x83, 0x42, 0xd1, 0xd0, 0xdc, 0x2f, 0x7a, 0xe5, 0xb6, 0x10,
+ 0xb2, 0x11, 0xc0, 0xdc, 0x21, 0x2a, 0x90, 0xff, 0xae, 0x97, 0x71, 0x5a, 0x49,
+ 0x81, 0xac, 0x40, 0xf3, 0x3b, 0xb8, 0x59, 0xb2, 0x4f, 0x02, 0x03, 0x01, 0x00,
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+ 0x6d, 0x6c, 0x3f, 0x30, 0x43, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x86, 0xf8,
+ 0x42, 0x01, 0x07, 0x04, 0x36, 0x16, 0x34, 0x68, 0x74, 0x74, 0x70, 0x73, 0x3a,
+ 0x2f, 0x2f, 0x77, 0x77, 0x77, 0x2e, 0x69, 0x70, 0x73, 0x63, 0x61, 0x2e, 0x63,
+ 0x6f, 0x6d, 0x2f, 0x69, 0x70, 0x73, 0x63, 0x61, 0x32, 0x30, 0x30, 0x32, 0x2f,
+ 0x72, 0x65, 0x6e, 0x65, 0x77, 0x61, 0x6c, 0x43, 0x4c, 0x41, 0x53, 0x45, 0x41,
+ 0x31, 0x2e, 0x68, 0x74, 0x6d, 0x6c, 0x3f, 0x30, 0x41, 0x06, 0x09, 0x60, 0x86,
+ 0x48, 0x01, 0x86, 0xf8, 0x42, 0x01, 0x08, 0x04, 0x34, 0x16, 0x32, 0x68, 0x74,
+ 0x74, 0x70, 0x73, 0x3a, 0x2f, 0x2f, 0x77, 0x77, 0x77, 0x2e, 0x69, 0x70, 0x73,
+ 0x63, 0x61, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x69, 0x70, 0x73, 0x63, 0x61, 0x32,
+ 0x30, 0x30, 0x32, 0x2f, 0x70, 0x6f, 0x6c, 0x69, 0x63, 0x79, 0x43, 0x4c, 0x41,
+ 0x53, 0x45, 0x41, 0x31, 0x2e, 0x68, 0x74, 0x6d, 0x6c, 0x30, 0x81, 0x83, 0x06,
+ 0x03, 0x55, 0x1d, 0x1f, 0x04, 0x7c, 0x30, 0x7a, 0x30, 0x39, 0xa0, 0x37, 0xa0,
+ 0x35, 0x86, 0x33, 0x68, 0x74, 0x74, 0x70, 0x3a, 0x2f, 0x2f, 0x77, 0x77, 0x77,
+ 0x2e, 0x69, 0x70, 0x73, 0x63, 0x61, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x69, 0x70,
+ 0x73, 0x63, 0x61, 0x32, 0x30, 0x30, 0x32, 0x2f, 0x69, 0x70, 0x73, 0x63, 0x61,
+ 0x32, 0x30, 0x30, 0x32, 0x43, 0x4c, 0x41, 0x53, 0x45, 0x41, 0x31, 0x2e, 0x63,
+ 0x72, 0x6c, 0x30, 0x3d, 0xa0, 0x3b, 0xa0, 0x39, 0x86, 0x37, 0x68, 0x74, 0x74,
+ 0x70, 0x3a, 0x2f, 0x2f, 0x77, 0x77, 0x77, 0x62, 0x61, 0x63, 0x6b, 0x2e, 0x69,
+ 0x70, 0x73, 0x63, 0x61, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x69, 0x70, 0x73, 0x63,
+ 0x61, 0x32, 0x30, 0x30, 0x32, 0x2f, 0x69, 0x70, 0x73, 0x63, 0x61, 0x32, 0x30,
+ 0x30, 0x32, 0x43, 0x4c, 0x41, 0x53, 0x45, 0x41, 0x31, 0x2e, 0x63, 0x72, 0x6c,
+ 0x30, 0x32, 0x06, 0x08, 0x2b, 0x06, 0x01, 0x05, 0x05, 0x07, 0x01, 0x01, 0x04,
+ 0x26, 0x30, 0x24, 0x30, 0x22, 0x06, 0x08, 0x2b, 0x06, 0x01, 0x05, 0x05, 0x07,
+ 0x30, 0x01, 0x86, 0x16, 0x68, 0x74, 0x74, 0x70, 0x3a, 0x2f, 0x2f, 0x6f, 0x63,
+ 0x73, 0x70, 0x2e, 0x69, 0x70, 0x73, 0x63, 0x61, 0x2e, 0x63, 0x6f, 0x6d, 0x2f,
+ 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x05,
+ 0x05, 0x00, 0x03, 0x81, 0x81, 0x00, 0x68, 0xee, 0x79, 0x97, 0x97, 0xdd, 0x3b,
+ 0xef, 0x16, 0x6a, 0x06, 0xf2, 0x14, 0x9a, 0x6e, 0xcd, 0x9e, 0x12, 0xf7, 0xaa,
+ 0x83, 0x10, 0xbd, 0xd1, 0x7c, 0x98, 0xfa, 0xc7, 0xae, 0xd4, 0x0e, 0x2c, 0x9e,
+ 0x38, 0x05, 0x9d, 0x52, 0x60, 0xa9, 0x99, 0x0a, 0x81, 0xb4, 0x98, 0x90, 0x1d,
+ 0xae, 0xbb, 0x4a, 0xd7, 0xb9, 0xdc, 0x88, 0x9e, 0x37, 0x78, 0x41, 0x5b, 0xf7,
+ 0x82, 0xa5, 0xf2, 0xba, 0x41, 0x25, 0x5a, 0x90, 0x1a, 0x1e, 0x45, 0x38, 0xa1,
+ 0x52, 0x58, 0x75, 0x94, 0x26, 0x44, 0xfb, 0x20, 0x07, 0xba, 0x44, 0xcc, 0xe5,
+ 0x4a, 0x2d, 0x72, 0x3f, 0x98, 0x47, 0xf6, 0x26, 0xdc, 0x05, 0x46, 0x05, 0x07,
+ 0x63, 0x21, 0xab, 0x46, 0x9b, 0x9c, 0x78, 0xd5, 0x54, 0x5b, 0x3d, 0x0c, 0x1e,
+ 0xc8, 0x64, 0x8c, 0xb5, 0x50, 0x23, 0x82, 0x6f, 0xdb, 0xb8, 0x22, 0x1c, 0x43,
+ 0x96, 0x07, 0xa8, 0xbb,
+}
diff --git a/libgo/go/encoding/asn1/common.go b/libgo/go/encoding/asn1/common.go
new file mode 100644
index 0000000..01f4f7b
--- /dev/null
+++ b/libgo/go/encoding/asn1/common.go
@@ -0,0 +1,158 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package asn1
+
+import (
+ "reflect"
+ "strconv"
+ "strings"
+)
+
+// ASN.1 objects have metadata preceding them:
+// the tag: the type of the object
+// a flag denoting if this object is compound or not
+// the class type: the namespace of the tag
+// the length of the object, in bytes
+
+// Here are some standard tags and classes
+
+const (
+ tagBoolean = 1
+ tagInteger = 2
+ tagBitString = 3
+ tagOctetString = 4
+ tagOID = 6
+ tagEnum = 10
+ tagUTF8String = 12
+ tagSequence = 16
+ tagSet = 17
+ tagPrintableString = 19
+ tagT61String = 20
+ tagIA5String = 22
+ tagUTCTime = 23
+ tagGeneralizedTime = 24
+ tagGeneralString = 27
+)
+
+const (
+ classUniversal = 0
+ classApplication = 1
+ classContextSpecific = 2
+ classPrivate = 3
+)
+
+type tagAndLength struct {
+ class, tag, length int
+ isCompound bool
+}
+
+// ASN.1 has IMPLICIT and EXPLICIT tags, which can be translated as "instead
+// of" and "in addition to". When not specified, every primitive type has a
+// default tag in the UNIVERSAL class.
+//
+// For example: a BIT STRING is tagged [UNIVERSAL 3] by default (although ASN.1
+// doesn't actually have a UNIVERSAL keyword). However, by saying [IMPLICIT
+// CONTEXT-SPECIFIC 42], that means that the tag is replaced by another.
+//
+// On the other hand, if it said [EXPLICIT CONTEXT-SPECIFIC 10], then an
+// /additional/ tag would wrap the default tag. This explicit tag will have the
+// compound flag set.
+//
+// (This is used in order to remove ambiguity with optional elements.)
+//
+// You can layer EXPLICIT and IMPLICIT tags to an arbitrary depth, however we
+// don't support that here. We support a single layer of EXPLICIT or IMPLICIT
+// tagging with tag strings on the fields of a structure.
+
+// fieldParameters is the parsed representation of tag string from a structure field.
+type fieldParameters struct {
+ optional bool // true iff the field is OPTIONAL
+ explicit bool // true iff an EXPLICIT tag is in use.
+ application bool // true iff an APPLICATION tag is in use.
+ defaultValue *int64 // a default value for INTEGER typed fields (maybe nil).
+ tag *int // the EXPLICIT or IMPLICIT tag (maybe nil).
+ stringType int // the string tag to use when marshaling.
+ set bool // true iff this should be encoded as a SET
+
+ // Invariants:
+ // if explicit is set, tag is non-nil.
+}
+
+// Given a tag string with the format specified in the package comment,
+// parseFieldParameters will parse it into a fieldParameters structure,
+// ignoring unknown parts of the string.
+func parseFieldParameters(str string) (ret fieldParameters) {
+ for _, part := range strings.Split(str, ",") {
+ switch {
+ case part == "optional":
+ ret.optional = true
+ case part == "explicit":
+ ret.explicit = true
+ if ret.tag == nil {
+ ret.tag = new(int)
+ }
+ case part == "ia5":
+ ret.stringType = tagIA5String
+ case part == "printable":
+ ret.stringType = tagPrintableString
+ case strings.HasPrefix(part, "default:"):
+ i, err := strconv.Atoi64(part[8:])
+ if err == nil {
+ ret.defaultValue = new(int64)
+ *ret.defaultValue = i
+ }
+ case strings.HasPrefix(part, "tag:"):
+ i, err := strconv.Atoi(part[4:])
+ if err == nil {
+ ret.tag = new(int)
+ *ret.tag = i
+ }
+ case part == "set":
+ ret.set = true
+ case part == "application":
+ ret.application = true
+ if ret.tag == nil {
+ ret.tag = new(int)
+ }
+ }
+ }
+ return
+}
+
+// Given a reflected Go type, getUniversalType returns the default tag number
+// and expected compound flag.
+func getUniversalType(t reflect.Type) (tagNumber int, isCompound, ok bool) {
+ switch t {
+ case objectIdentifierType:
+ return tagOID, false, true
+ case bitStringType:
+ return tagBitString, false, true
+ case timeType:
+ return tagUTCTime, false, true
+ case enumeratedType:
+ return tagEnum, false, true
+ case bigIntType:
+ return tagInteger, false, true
+ }
+ switch t.Kind() {
+ case reflect.Bool:
+ return tagBoolean, false, true
+ case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+ return tagInteger, false, true
+ case reflect.Struct:
+ return tagSequence, true, true
+ case reflect.Slice:
+ if t.Elem().Kind() == reflect.Uint8 {
+ return tagOctetString, false, true
+ }
+ if strings.HasSuffix(t.Name(), "SET") {
+ return tagSet, true, true
+ }
+ return tagSequence, true, true
+ case reflect.String:
+ return tagPrintableString, false, true
+ }
+ return 0, false, false
+}
diff --git a/libgo/go/encoding/asn1/marshal.go b/libgo/go/encoding/asn1/marshal.go
new file mode 100644
index 0000000..89c50a7
--- /dev/null
+++ b/libgo/go/encoding/asn1/marshal.go
@@ -0,0 +1,547 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package asn1
+
+import (
+ "bytes"
+ "fmt"
+ "io"
+ "math/big"
+ "reflect"
+ "time"
+)
+
+// A forkableWriter is an in-memory buffer that can be
+// 'forked' to create new forkableWriters that bracket the
+// original. After
+// pre, post := w.fork();
+// the overall sequence of bytes represented is logically w+pre+post.
+type forkableWriter struct {
+ *bytes.Buffer
+ pre, post *forkableWriter
+}
+
+func newForkableWriter() *forkableWriter {
+ return &forkableWriter{bytes.NewBuffer(nil), nil, nil}
+}
+
+func (f *forkableWriter) fork() (pre, post *forkableWriter) {
+ if f.pre != nil || f.post != nil {
+ panic("have already forked")
+ }
+ f.pre = newForkableWriter()
+ f.post = newForkableWriter()
+ return f.pre, f.post
+}
+
+func (f *forkableWriter) Len() (l int) {
+ l += f.Buffer.Len()
+ if f.pre != nil {
+ l += f.pre.Len()
+ }
+ if f.post != nil {
+ l += f.post.Len()
+ }
+ return
+}
+
+func (f *forkableWriter) writeTo(out io.Writer) (n int, err error) {
+ n, err = out.Write(f.Bytes())
+ if err != nil {
+ return
+ }
+
+ var nn int
+
+ if f.pre != nil {
+ nn, err = f.pre.writeTo(out)
+ n += nn
+ if err != nil {
+ return
+ }
+ }
+
+ if f.post != nil {
+ nn, err = f.post.writeTo(out)
+ n += nn
+ }
+ return
+}
+
+func marshalBase128Int(out *forkableWriter, n int64) (err error) {
+ if n == 0 {
+ err = out.WriteByte(0)
+ return
+ }
+
+ l := 0
+ for i := n; i > 0; i >>= 7 {
+ l++
+ }
+
+ for i := l - 1; i >= 0; i-- {
+ o := byte(n >> uint(i*7))
+ o &= 0x7f
+ if i != 0 {
+ o |= 0x80
+ }
+ err = out.WriteByte(o)
+ if err != nil {
+ return
+ }
+ }
+
+ return nil
+}
+
+func marshalInt64(out *forkableWriter, i int64) (err error) {
+ n := int64Length(i)
+
+ for ; n > 0; n-- {
+ err = out.WriteByte(byte(i >> uint((n-1)*8)))
+ if err != nil {
+ return
+ }
+ }
+
+ return nil
+}
+
+func int64Length(i int64) (numBytes int) {
+ numBytes = 1
+
+ for i > 127 {
+ numBytes++
+ i >>= 8
+ }
+
+ for i < -128 {
+ numBytes++
+ i >>= 8
+ }
+
+ return
+}
+
+func marshalBigInt(out *forkableWriter, n *big.Int) (err error) {
+ if n.Sign() < 0 {
+ // A negative number has to be converted to two's-complement
+ // form. So we'll subtract 1 and invert. If the
+ // most-significant-bit isn't set then we'll need to pad the
+ // beginning with 0xff in order to keep the number negative.
+ nMinus1 := new(big.Int).Neg(n)
+ nMinus1.Sub(nMinus1, bigOne)
+ bytes := nMinus1.Bytes()
+ for i := range bytes {
+ bytes[i] ^= 0xff
+ }
+ if len(bytes) == 0 || bytes[0]&0x80 == 0 {
+ err = out.WriteByte(0xff)
+ if err != nil {
+ return
+ }
+ }
+ _, err = out.Write(bytes)
+ } else if n.Sign() == 0 {
+ // Zero is written as a single 0 zero rather than no bytes.
+ err = out.WriteByte(0x00)
+ } else {
+ bytes := n.Bytes()
+ if len(bytes) > 0 && bytes[0]&0x80 != 0 {
+ // We'll have to pad this with 0x00 in order to stop it
+ // looking like a negative number.
+ err = out.WriteByte(0)
+ if err != nil {
+ return
+ }
+ }
+ _, err = out.Write(bytes)
+ }
+ return
+}
+
+func marshalLength(out *forkableWriter, i int) (err error) {
+ n := lengthLength(i)
+
+ for ; n > 0; n-- {
+ err = out.WriteByte(byte(i >> uint((n-1)*8)))
+ if err != nil {
+ return
+ }
+ }
+
+ return nil
+}
+
+func lengthLength(i int) (numBytes int) {
+ numBytes = 1
+ for i > 255 {
+ numBytes++
+ i >>= 8
+ }
+ return
+}
+
+func marshalTagAndLength(out *forkableWriter, t tagAndLength) (err error) {
+ b := uint8(t.class) << 6
+ if t.isCompound {
+ b |= 0x20
+ }
+ if t.tag >= 31 {
+ b |= 0x1f
+ err = out.WriteByte(b)
+ if err != nil {
+ return
+ }
+ err = marshalBase128Int(out, int64(t.tag))
+ if err != nil {
+ return
+ }
+ } else {
+ b |= uint8(t.tag)
+ err = out.WriteByte(b)
+ if err != nil {
+ return
+ }
+ }
+
+ if t.length >= 128 {
+ l := lengthLength(t.length)
+ err = out.WriteByte(0x80 | byte(l))
+ if err != nil {
+ return
+ }
+ err = marshalLength(out, t.length)
+ if err != nil {
+ return
+ }
+ } else {
+ err = out.WriteByte(byte(t.length))
+ if err != nil {
+ return
+ }
+ }
+
+ return nil
+}
+
+func marshalBitString(out *forkableWriter, b BitString) (err error) {
+ paddingBits := byte((8 - b.BitLength%8) % 8)
+ err = out.WriteByte(paddingBits)
+ if err != nil {
+ return
+ }
+ _, err = out.Write(b.Bytes)
+ return
+}
+
+func marshalObjectIdentifier(out *forkableWriter, oid []int) (err error) {
+ if len(oid) < 2 || oid[0] > 6 || oid[1] >= 40 {
+ return StructuralError{"invalid object identifier"}
+ }
+
+ err = out.WriteByte(byte(oid[0]*40 + oid[1]))
+ if err != nil {
+ return
+ }
+ for i := 2; i < len(oid); i++ {
+ err = marshalBase128Int(out, int64(oid[i]))
+ if err != nil {
+ return
+ }
+ }
+
+ return
+}
+
+func marshalPrintableString(out *forkableWriter, s string) (err error) {
+ b := []byte(s)
+ for _, c := range b {
+ if !isPrintable(c) {
+ return StructuralError{"PrintableString contains invalid character"}
+ }
+ }
+
+ _, err = out.Write(b)
+ return
+}
+
+func marshalIA5String(out *forkableWriter, s string) (err error) {
+ b := []byte(s)
+ for _, c := range b {
+ if c > 127 {
+ return StructuralError{"IA5String contains invalid character"}
+ }
+ }
+
+ _, err = out.Write(b)
+ return
+}
+
+func marshalTwoDigits(out *forkableWriter, v int) (err error) {
+ err = out.WriteByte(byte('0' + (v/10)%10))
+ if err != nil {
+ return
+ }
+ return out.WriteByte(byte('0' + v%10))
+}
+
+func marshalUTCTime(out *forkableWriter, t *time.Time) (err error) {
+ switch {
+ case 1950 <= t.Year && t.Year < 2000:
+ err = marshalTwoDigits(out, int(t.Year-1900))
+ case 2000 <= t.Year && t.Year < 2050:
+ err = marshalTwoDigits(out, int(t.Year-2000))
+ default:
+ return StructuralError{"Cannot represent time as UTCTime"}
+ }
+
+ if err != nil {
+ return
+ }
+
+ err = marshalTwoDigits(out, t.Month)
+ if err != nil {
+ return
+ }
+
+ err = marshalTwoDigits(out, t.Day)
+ if err != nil {
+ return
+ }
+
+ err = marshalTwoDigits(out, t.Hour)
+ if err != nil {
+ return
+ }
+
+ err = marshalTwoDigits(out, t.Minute)
+ if err != nil {
+ return
+ }
+
+ err = marshalTwoDigits(out, t.Second)
+ if err != nil {
+ return
+ }
+
+ switch {
+ case t.ZoneOffset/60 == 0:
+ err = out.WriteByte('Z')
+ return
+ case t.ZoneOffset > 0:
+ err = out.WriteByte('+')
+ case t.ZoneOffset < 0:
+ err = out.WriteByte('-')
+ }
+
+ if err != nil {
+ return
+ }
+
+ offsetMinutes := t.ZoneOffset / 60
+ if offsetMinutes < 0 {
+ offsetMinutes = -offsetMinutes
+ }
+
+ err = marshalTwoDigits(out, offsetMinutes/60)
+ if err != nil {
+ return
+ }
+
+ err = marshalTwoDigits(out, offsetMinutes%60)
+ return
+}
+
+func stripTagAndLength(in []byte) []byte {
+ _, offset, err := parseTagAndLength(in, 0)
+ if err != nil {
+ return in
+ }
+ return in[offset:]
+}
+
+func marshalBody(out *forkableWriter, value reflect.Value, params fieldParameters) (err error) {
+ switch value.Type() {
+ case timeType:
+ return marshalUTCTime(out, value.Interface().(*time.Time))
+ case bitStringType:
+ return marshalBitString(out, value.Interface().(BitString))
+ case objectIdentifierType:
+ return marshalObjectIdentifier(out, value.Interface().(ObjectIdentifier))
+ case bigIntType:
+ return marshalBigInt(out, value.Interface().(*big.Int))
+ }
+
+ switch v := value; v.Kind() {
+ case reflect.Bool:
+ if v.Bool() {
+ return out.WriteByte(255)
+ } else {
+ return out.WriteByte(0)
+ }
+ case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+ return marshalInt64(out, int64(v.Int()))
+ case reflect.Struct:
+ t := v.Type()
+
+ startingField := 0
+
+ // If the first element of the structure is a non-empty
+ // RawContents, then we don't bother serializing the rest.
+ if t.NumField() > 0 && t.Field(0).Type == rawContentsType {
+ s := v.Field(0)
+ if s.Len() > 0 {
+ bytes := make([]byte, s.Len())
+ for i := 0; i < s.Len(); i++ {
+ bytes[i] = uint8(s.Index(i).Uint())
+ }
+ /* The RawContents will contain the tag and
+ * length fields but we'll also be writing
+ * those ourselves, so we strip them out of
+ * bytes */
+ _, err = out.Write(stripTagAndLength(bytes))
+ return
+ } else {
+ startingField = 1
+ }
+ }
+
+ for i := startingField; i < t.NumField(); i++ {
+ var pre *forkableWriter
+ pre, out = out.fork()
+ err = marshalField(pre, v.Field(i), parseFieldParameters(t.Field(i).Tag.Get("asn1")))
+ if err != nil {
+ return
+ }
+ }
+ return
+ case reflect.Slice:
+ sliceType := v.Type()
+ if sliceType.Elem().Kind() == reflect.Uint8 {
+ bytes := make([]byte, v.Len())
+ for i := 0; i < v.Len(); i++ {
+ bytes[i] = uint8(v.Index(i).Uint())
+ }
+ _, err = out.Write(bytes)
+ return
+ }
+
+ var params fieldParameters
+ for i := 0; i < v.Len(); i++ {
+ var pre *forkableWriter
+ pre, out = out.fork()
+ err = marshalField(pre, v.Index(i), params)
+ if err != nil {
+ return
+ }
+ }
+ return
+ case reflect.String:
+ if params.stringType == tagIA5String {
+ return marshalIA5String(out, v.String())
+ } else {
+ return marshalPrintableString(out, v.String())
+ }
+ return
+ }
+
+ return StructuralError{"unknown Go type"}
+}
+
+func marshalField(out *forkableWriter, v reflect.Value, params fieldParameters) (err error) {
+ // If the field is an interface{} then recurse into it.
+ if v.Kind() == reflect.Interface && v.Type().NumMethod() == 0 {
+ return marshalField(out, v.Elem(), params)
+ }
+
+ if params.optional && reflect.DeepEqual(v.Interface(), reflect.Zero(v.Type()).Interface()) {
+ return
+ }
+
+ if v.Type() == rawValueType {
+ rv := v.Interface().(RawValue)
+ if len(rv.FullBytes) != 0 {
+ _, err = out.Write(rv.FullBytes)
+ } else {
+ err = marshalTagAndLength(out, tagAndLength{rv.Class, rv.Tag, len(rv.Bytes), rv.IsCompound})
+ if err != nil {
+ return
+ }
+ _, err = out.Write(rv.Bytes)
+ }
+ return
+ }
+
+ tag, isCompound, ok := getUniversalType(v.Type())
+ if !ok {
+ err = StructuralError{fmt.Sprintf("unknown Go type: %v", v.Type())}
+ return
+ }
+ class := classUniversal
+
+ if params.stringType != 0 {
+ if tag != tagPrintableString {
+ return StructuralError{"Explicit string type given to non-string member"}
+ }
+ tag = params.stringType
+ }
+
+ if params.set {
+ if tag != tagSequence {
+ return StructuralError{"Non sequence tagged as set"}
+ }
+ tag = tagSet
+ }
+
+ tags, body := out.fork()
+
+ err = marshalBody(body, v, params)
+ if err != nil {
+ return
+ }
+
+ bodyLen := body.Len()
+
+ var explicitTag *forkableWriter
+ if params.explicit {
+ explicitTag, tags = tags.fork()
+ }
+
+ if !params.explicit && params.tag != nil {
+ // implicit tag.
+ tag = *params.tag
+ class = classContextSpecific
+ }
+
+ err = marshalTagAndLength(tags, tagAndLength{class, tag, bodyLen, isCompound})
+ if err != nil {
+ return
+ }
+
+ if params.explicit {
+ err = marshalTagAndLength(explicitTag, tagAndLength{
+ class: classContextSpecific,
+ tag: *params.tag,
+ length: bodyLen + tags.Len(),
+ isCompound: true,
+ })
+ }
+
+ return nil
+}
+
+// Marshal returns the ASN.1 encoding of val.
+func Marshal(val interface{}) ([]byte, error) {
+ var out bytes.Buffer
+ v := reflect.ValueOf(val)
+ f := newForkableWriter()
+ err := marshalField(f, v, fieldParameters{})
+ if err != nil {
+ return nil, err
+ }
+ _, err = f.writeTo(&out)
+ return out.Bytes(), nil
+}
diff --git a/libgo/go/encoding/asn1/marshal_test.go b/libgo/go/encoding/asn1/marshal_test.go
new file mode 100644
index 0000000..03df5f1
--- /dev/null
+++ b/libgo/go/encoding/asn1/marshal_test.go
@@ -0,0 +1,129 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package asn1
+
+import (
+ "bytes"
+ "encoding/hex"
+ "testing"
+ "time"
+)
+
+type intStruct struct {
+ A int
+}
+
+type twoIntStruct struct {
+ A int
+ B int
+}
+
+type nestedStruct struct {
+ A intStruct
+}
+
+type rawContentsStruct struct {
+ Raw RawContent
+ A int
+}
+
+type implicitTagTest struct {
+ A int `asn1:"implicit,tag:5"`
+}
+
+type explicitTagTest struct {
+ A int `asn1:"explicit,tag:5"`
+}
+
+type ia5StringTest struct {
+ A string `asn1:"ia5"`
+}
+
+type printableStringTest struct {
+ A string `asn1:"printable"`
+}
+
+type optionalRawValueTest struct {
+ A RawValue `asn1:"optional"`
+}
+
+type testSET []int
+
+func setPST(t *time.Time) *time.Time {
+ t.ZoneOffset = -28800
+ return t
+}
+
+type marshalTest struct {
+ in interface{}
+ out string // hex encoded
+}
+
+var marshalTests = []marshalTest{
+ {10, "02010a"},
+ {127, "02017f"},
+ {128, "02020080"},
+ {-128, "020180"},
+ {-129, "0202ff7f"},
+ {intStruct{64}, "3003020140"},
+ {twoIntStruct{64, 65}, "3006020140020141"},
+ {nestedStruct{intStruct{127}}, "3005300302017f"},
+ {[]byte{1, 2, 3}, "0403010203"},
+ {implicitTagTest{64}, "3003850140"},
+ {explicitTagTest{64}, "3005a503020140"},
+ {time.SecondsToUTC(0), "170d3730303130313030303030305a"},
+ {time.SecondsToUTC(1258325776), "170d3039313131353232353631365a"},
+ {setPST(time.SecondsToUTC(1258325776)), "17113039313131353232353631362d30383030"},
+ {BitString{[]byte{0x80}, 1}, "03020780"},
+ {BitString{[]byte{0x81, 0xf0}, 12}, "03030481f0"},
+ {ObjectIdentifier([]int{1, 2, 3, 4}), "06032a0304"},
+ {ObjectIdentifier([]int{1, 2, 840, 133549, 1, 1, 5}), "06092a864888932d010105"},
+ {"test", "130474657374"},
+ {
+ "" +
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" +
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" +
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" +
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", // This is 127 times 'x'
+ "137f" +
+ "7878787878787878787878787878787878787878787878787878787878787878" +
+ "7878787878787878787878787878787878787878787878787878787878787878" +
+ "7878787878787878787878787878787878787878787878787878787878787878" +
+ "78787878787878787878787878787878787878787878787878787878787878",
+ },
+ {
+ "" +
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" +
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" +
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" +
+ "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", // This is 128 times 'x'
+ "138180" +
+ "7878787878787878787878787878787878787878787878787878787878787878" +
+ "7878787878787878787878787878787878787878787878787878787878787878" +
+ "7878787878787878787878787878787878787878787878787878787878787878" +
+ "7878787878787878787878787878787878787878787878787878787878787878",
+ },
+ {ia5StringTest{"test"}, "3006160474657374"},
+ {optionalRawValueTest{}, "3000"},
+ {printableStringTest{"test"}, "3006130474657374"},
+ {printableStringTest{"test*"}, "30071305746573742a"},
+ {rawContentsStruct{nil, 64}, "3003020140"},
+ {rawContentsStruct{[]byte{0x30, 3, 1, 2, 3}, 64}, "3003010203"},
+ {RawValue{Tag: 1, Class: 2, IsCompound: false, Bytes: []byte{1, 2, 3}}, "8103010203"},
+ {testSET([]int{10}), "310302010a"},
+}
+
+func TestMarshal(t *testing.T) {
+ for i, test := range marshalTests {
+ data, err := Marshal(test.in)
+ if err != nil {
+ t.Errorf("#%d failed: %s", i, err)
+ }
+ out, _ := hex.DecodeString(test.out)
+ if bytes.Compare(out, data) != 0 {
+ t.Errorf("#%d got: %x want %x", i, data, out)
+ }
+ }
+}
generated by cgit v1.1 at 2024-10-31 22:53:44 +0000