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jeremybenn |
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package pkix contains shared, low level structures used for ASN.1 parsing
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// and serialization of X.509 certificates, CRL and OCSP.
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package pkix
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import (
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"encoding/asn1"
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"math/big"
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"time"
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)
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// AlgorithmIdentifier represents the ASN.1 structure of the same name. See RFC
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// 5280, section 4.1.1.2.
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type AlgorithmIdentifier struct {
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Algorithm asn1.ObjectIdentifier
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Parameters asn1.RawValue `asn1:"optional"`
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}
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type RDNSequence []RelativeDistinguishedNameSET
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type RelativeDistinguishedNameSET []AttributeTypeAndValue
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// AttributeTypeAndValue mirrors the ASN.1 structure of the same name in
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// http://tools.ietf.org/html/rfc5280#section-4.1.2.4
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type AttributeTypeAndValue struct {
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Type asn1.ObjectIdentifier
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Value interface{}
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}
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// Extension represents the ASN.1 structure of the same name. See RFC
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// 5280, section 4.2.
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type Extension struct {
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Id asn1.ObjectIdentifier
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Critical bool `asn1:"optional"`
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Value []byte
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}
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// Name represents an X.509 distinguished name. This only includes the common
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// elements of a DN. Additional elements in the name are ignored.
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type Name struct {
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Country, Organization, OrganizationalUnit []string
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Locality, Province []string
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StreetAddress, PostalCode []string
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SerialNumber, CommonName string
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Names []AttributeTypeAndValue
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}
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func (n *Name) FillFromRDNSequence(rdns *RDNSequence) {
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for _, rdn := range *rdns {
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if len(rdn) == 0 {
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continue
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}
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atv := rdn[0]
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n.Names = append(n.Names, atv)
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value, ok := atv.Value.(string)
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if !ok {
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continue
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}
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t := atv.Type
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if len(t) == 4 && t[0] == 2 && t[1] == 5 && t[2] == 4 {
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switch t[3] {
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case 3:
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n.CommonName = value
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case 5:
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n.SerialNumber = value
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case 6:
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n.Country = append(n.Country, value)
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case 7:
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n.Locality = append(n.Locality, value)
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case 8:
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n.Province = append(n.Province, value)
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case 9:
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n.StreetAddress = append(n.StreetAddress, value)
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case 10:
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n.Organization = append(n.Organization, value)
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case 11:
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n.OrganizationalUnit = append(n.OrganizationalUnit, value)
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case 17:
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n.PostalCode = append(n.PostalCode, value)
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}
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}
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}
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}
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var (
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oidCountry = []int{2, 5, 4, 6}
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oidOrganization = []int{2, 5, 4, 10}
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oidOrganizationalUnit = []int{2, 5, 4, 11}
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oidCommonName = []int{2, 5, 4, 3}
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oidSerialNumber = []int{2, 5, 4, 5}
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oidLocality = []int{2, 5, 4, 7}
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oidProvince = []int{2, 5, 4, 8}
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oidStreetAddress = []int{2, 5, 4, 9}
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oidPostalCode = []int{2, 5, 4, 17}
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)
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// appendRDNs appends a relativeDistinguishedNameSET to the given RDNSequence
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// and returns the new value. The relativeDistinguishedNameSET contains an
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// attributeTypeAndValue for each of the given values. See RFC 5280, A.1, and
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// search for AttributeTypeAndValue.
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func appendRDNs(in RDNSequence, values []string, oid asn1.ObjectIdentifier) RDNSequence {
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if len(values) == 0 {
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return in
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}
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s := make([]AttributeTypeAndValue, len(values))
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for i, value := range values {
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s[i].Type = oid
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s[i].Value = value
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}
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return append(in, s)
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}
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func (n Name) ToRDNSequence() (ret RDNSequence) {
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ret = appendRDNs(ret, n.Country, oidCountry)
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ret = appendRDNs(ret, n.Organization, oidOrganization)
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ret = appendRDNs(ret, n.OrganizationalUnit, oidOrganizationalUnit)
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ret = appendRDNs(ret, n.Locality, oidLocality)
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ret = appendRDNs(ret, n.Province, oidProvince)
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ret = appendRDNs(ret, n.StreetAddress, oidStreetAddress)
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ret = appendRDNs(ret, n.PostalCode, oidPostalCode)
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if len(n.CommonName) > 0 {
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ret = appendRDNs(ret, []string{n.CommonName}, oidCommonName)
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}
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if len(n.SerialNumber) > 0 {
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ret = appendRDNs(ret, []string{n.SerialNumber}, oidSerialNumber)
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}
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return ret
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}
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// CertificateList represents the ASN.1 structure of the same name. See RFC
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// 5280, section 5.1. Use Certificate.CheckCRLSignature to verify the
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// signature.
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type CertificateList struct {
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TBSCertList TBSCertificateList
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SignatureAlgorithm AlgorithmIdentifier
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SignatureValue asn1.BitString
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}
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// HasExpired returns true iff now is past the expiry time of certList.
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func (certList *CertificateList) HasExpired(now time.Time) bool {
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return now.After(certList.TBSCertList.NextUpdate)
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}
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// TBSCertificateList represents the ASN.1 structure of the same name. See RFC
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// 5280, section 5.1.
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type TBSCertificateList struct {
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Raw asn1.RawContent
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Version int `asn1:"optional,default:2"`
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Signature AlgorithmIdentifier
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Issuer RDNSequence
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ThisUpdate time.Time
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NextUpdate time.Time
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RevokedCertificates []RevokedCertificate `asn1:"optional"`
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Extensions []Extension `asn1:"tag:0,optional,explicit"`
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}
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// RevokedCertificate represents the ASN.1 structure of the same name. See RFC
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// 5280, section 5.1.
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type RevokedCertificate struct {
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SerialNumber *big.Int
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RevocationTime time.Time
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Extensions []Extension `asn1:"optional"`
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}
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