/
qc_stmt.go
285 lines (257 loc) · 7.94 KB
/
qc_stmt.go
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/*
* ZLint Copyright 2017 Regents of the University of Michigan
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package util
import (
"bytes"
"encoding/asn1"
"fmt"
"reflect"
)
func etsiOidToDescString(oid asn1.ObjectIdentifier) string {
switch {
case oid.Equal(IdEtsiQcsQcCompliance):
{
return "IdEtsiQcsQcCompliance"
}
case oid.Equal(IdEtsiQcsQcLimitValue):
{
return "IdEtsiQcsQcLimitValue"
}
case oid.Equal(IdEtsiQcsQcRetentionPeriod):
{
return "IdEtsiQcsQcRetentionPeriod"
}
case oid.Equal(IdEtsiQcsQcSSCD):
{
return "IdEtsiQcsQcSSCSD"
}
case oid.Equal(IdEtsiQcsQcEuPDS):
{
return "IdEtsiQcsQcEuPDS"
}
case oid.Equal(IdEtsiQcsQcType):
{
return "IdEtsiQcsQcType"
}
default:
{
panic("unresolved ETSI QC Statement OID")
}
}
}
type anyContent struct {
Raw asn1.RawContent
}
type qcStatementWithInfoField struct {
Oid asn1.ObjectIdentifier
Any asn1.RawValue
}
type qcStatementWithoutInfoField struct {
Oid asn1.ObjectIdentifier
}
type etsiBase struct {
errorInfo string
isPresent bool
}
func (this etsiBase) GetErrorInfo() string {
return this.errorInfo
}
func (this etsiBase) IsPresent() bool {
return this.isPresent
}
type EtsiQcStmtIf interface {
GetErrorInfo() string
IsPresent() bool
}
type Etsi421QualEuCert struct {
etsiBase
}
type Etsi423QcType struct {
etsiBase
TypeOids []asn1.ObjectIdentifier
}
type EtsiQcSscd struct {
etsiBase
}
type EtsiMonetaryValueAlph struct {
Iso4217CurrencyCodeAlph string `asn1:"printable"`
Amount int
Exponent int
}
type EtsiMonetaryValueNum struct {
Iso4217CurrencyCodeNum int
Amount int
Exponent int
}
type EtsiQcLimitValue struct {
etsiBase
Amount int
Exponent int
IsNum bool
CurrencyAlph string
CurrencyNum int
}
type EtsiQcRetentionPeriod struct {
etsiBase
Period int
}
type PdsLocation struct {
Url string `asn1:"ia5"`
Language string `asn1:"printable"`
}
type EtsiQcPds struct {
etsiBase
PdsLocations []PdsLocation
}
func AppendToStringSemicolonDelim(this *string, s string) {
if len(*this) > 0 && len(s) > 0 {
(*this) += "; "
}
(*this) += s
}
func checkAsn1Reencoding(i interface{}, originalEncoding []byte, appendIfComparisonFails string) string {
result := ""
reencoded, marshErr := asn1.Marshal(i)
if marshErr != nil {
AppendToStringSemicolonDelim(&result, fmt.Sprintf("error reencoding ASN1 value of statementInfo field: %s",
marshErr))
}
if !bytes.Equal(reencoded, originalEncoding) {
AppendToStringSemicolonDelim(&result, appendIfComparisonFails)
}
return result
}
func IsAnyEtsiQcStatementPresent(extVal []byte) bool {
oidList := make([]*asn1.ObjectIdentifier, 6)
oidList[0] = &IdEtsiQcsQcCompliance
oidList[1] = &IdEtsiQcsQcLimitValue
oidList[2] = &IdEtsiQcsQcRetentionPeriod
oidList[3] = &IdEtsiQcsQcSSCD
oidList[4] = &IdEtsiQcsQcEuPDS
oidList[5] = &IdEtsiQcsQcType
for _, oid := range oidList {
r := ParseQcStatem(extVal, *oid)
if r.IsPresent() {
return true
}
}
return false
}
func ParseQcStatem(extVal []byte, sought asn1.ObjectIdentifier) EtsiQcStmtIf {
sl := make([]anyContent, 0)
rest, err := asn1.Unmarshal(extVal, &sl)
if err != nil {
return etsiBase{errorInfo: "error parsing outer SEQ", isPresent: true}
}
if len(rest) != 0 {
return etsiBase{errorInfo: "rest len of outer seq != 0", isPresent: true}
}
for _, raw := range sl {
parseErrorString := "format error in at least one QC statement within the QC statements extension." +
" this message may appear multiple times for the same error cause."
var statem qcStatementWithInfoField
rest, err = asn1.Unmarshal(raw.Raw, &statem)
if err != nil {
var statemWithoutInfo qcStatementWithoutInfoField
rest, err = asn1.Unmarshal(raw.Raw, &statemWithoutInfo)
if err != nil || len(rest) != 0 {
return etsiBase{errorInfo: parseErrorString, isPresent: false}
}
copy(statem.Oid, statemWithoutInfo.Oid)
if len(statem.Any.FullBytes) != 0 {
return etsiBase{errorInfo: "internal error, default optional content len is not zero"}
}
} else if 0 != len(rest) {
return etsiBase{errorInfo: parseErrorString, isPresent: false}
}
if !statem.Oid.Equal(sought) {
continue
}
if statem.Oid.Equal(IdEtsiQcsQcCompliance) {
etsiObj := Etsi421QualEuCert{etsiBase: etsiBase{isPresent: true}}
statemWithoutInfo := qcStatementWithoutInfoField{Oid: statem.Oid}
AppendToStringSemicolonDelim(&etsiObj.errorInfo, checkAsn1Reencoding(reflect.ValueOf(statemWithoutInfo).Interface(), raw.Raw,
"invalid format of ETSI Complicance statement"))
return etsiObj
} else if statem.Oid.Equal(IdEtsiQcsQcLimitValue) {
etsiObj := EtsiQcLimitValue{etsiBase: etsiBase{isPresent: true}}
numErr := false
alphErr := false
var numeric EtsiMonetaryValueNum
var alphabetic EtsiMonetaryValueAlph
restNum, errNum := asn1.Unmarshal(statem.Any.FullBytes, &numeric)
if len(restNum) != 0 || errNum != nil {
numErr = true
} else {
etsiObj.IsNum = true
etsiObj.Amount = numeric.Amount
etsiObj.Exponent = numeric.Exponent
etsiObj.CurrencyNum = numeric.Iso4217CurrencyCodeNum
}
if numErr {
restAlph, errAlph := asn1.Unmarshal(statem.Any.FullBytes, &alphabetic)
if len(restAlph) != 0 || errAlph != nil {
alphErr = true
} else {
etsiObj.IsNum = false
etsiObj.Amount = alphabetic.Amount
etsiObj.Exponent = alphabetic.Exponent
etsiObj.CurrencyAlph = alphabetic.Iso4217CurrencyCodeAlph
AppendToStringSemicolonDelim(&etsiObj.errorInfo,
checkAsn1Reencoding(reflect.ValueOf(alphabetic).Interface(),
statem.Any.FullBytes, "error with ASN.1 encoding, possibly a wrong ASN.1 string type was used"))
}
}
if numErr && alphErr {
etsiObj.errorInfo = "error parsing the ETSI Qc Statement statementInfo field"
}
return etsiObj
} else if statem.Oid.Equal(IdEtsiQcsQcRetentionPeriod) {
etsiObj := EtsiQcRetentionPeriod{etsiBase: etsiBase{isPresent: true}}
rest, err := asn1.Unmarshal(statem.Any.FullBytes, &etsiObj.Period)
if len(rest) != 0 || err != nil {
etsiObj.errorInfo = "error parsing the statementInfo field"
}
return etsiObj
} else if statem.Oid.Equal(IdEtsiQcsQcSSCD) {
etsiObj := EtsiQcSscd{etsiBase: etsiBase{isPresent: true}}
statemWithoutInfo := qcStatementWithoutInfoField{Oid: statem.Oid}
AppendToStringSemicolonDelim(&etsiObj.errorInfo, checkAsn1Reencoding(reflect.ValueOf(statemWithoutInfo).Interface(), raw.Raw,
"invalid format of ETSI SCSD statement"))
return etsiObj
} else if statem.Oid.Equal(IdEtsiQcsQcEuPDS) {
etsiObj := EtsiQcPds{etsiBase: etsiBase{isPresent: true}}
rest, err := asn1.Unmarshal(statem.Any.FullBytes, &etsiObj.PdsLocations)
if len(rest) != 0 || err != nil {
etsiObj.errorInfo = "error parsing the statementInfo field"
} else {
AppendToStringSemicolonDelim(&etsiObj.errorInfo,
checkAsn1Reencoding(reflect.ValueOf(etsiObj.PdsLocations).Interface(), statem.Any.FullBytes,
"error with ASN.1 encoding, possibly a wrong ASN.1 string type was used"))
}
return etsiObj
} else if statem.Oid.Equal(IdEtsiQcsQcType) {
var qcType Etsi423QcType
qcType.isPresent = true
rest, err := asn1.Unmarshal(statem.Any.FullBytes, &qcType.TypeOids)
if len(rest) != 0 || err != nil {
return etsiBase{errorInfo: "error parsing IdEtsiQcsQcType extension statementInfo field", isPresent: true}
}
return qcType
} else {
return etsiBase{errorInfo: "", isPresent: true}
}
}
return etsiBase{errorInfo: "", isPresent: false}
}