Imported Upstream version 1.4upstream/1.4

1 files changed, 0 insertions, 163 deletions

diff --git a/src/pkg/encoding/asn1/common.go b/src/pkg/encoding/asn1/common.go
deleted file mode 100644
index 33a117ece..000000000
--- a/src/pkg/encoding/asn1/common.go
+++ /dev/null
@@ -1,163 +0,0 @@
-// 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
-	omitEmpty    bool   // true iff this should be omitted if empty when marshaling.
-
-	// 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 part == "utf8":
-			ret.stringType = tagUTF8String
-		case strings.HasPrefix(part, "default:"):
-			i, err := strconv.ParseInt(part[8:], 10, 64)
-			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)
-			}
-		case part == "omitempty":
-			ret.omitEmpty = true
-		}
-	}
-	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
-}