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crypto/x509/pkix: print non-standard parsed Names at the end

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This doesn't change how ExtraNames are printed, so as not to cause
unnecessary churn of current outputs. Switched the ExtraNames check to a
nil check as we are checking for just-parsed values.

Fixes #39924
Fixes #39873

Change-Id: Ifa07cfc1a057d73643710a774ef8a154222db187
Reviewed-on: https://go-review.googlesource.com/c/go/+/240543
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Filippo Valsorda 2020-06-30 12:04:46 -04:00
parent 6ba3e6a8c7
commit 12debf4a65
3 changed files with 51 additions and 6 deletions
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4
doc/go1.15.html
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@ -553,11 +553,11 @@ Do not send CLs removing the interior tags from such phrases.
<dl id="crypto/x509/pkix"><dt><a href="/pkg/crypto/x509/pkix/">crypto/x509/pkix</a></dt>
<dd>
<p><!-- CL 229864 -->
<p><!-- CL 229864, CL 240543 -->
<a href="/pkg/crypto/x509/pkix/#Name.String"><code>Name.String</code></a>
now prints non-standard attributes from
<a href="/pkg/crypto/x509/pkix/#Name.Names"><code>Names</code></a> if
<a href="/pkg/crypto/x509/pkix/#Name.ExtraNames"><code>ExtraNames</code></a> is empty.
<a href="/pkg/crypto/x509/pkix/#Name.ExtraNames"><code>ExtraNames</code></a> is nil.
</p>
</dd>
</dl><!-- crypto/x509/pkix -->

14
src/crypto/x509/pkix/pkix.go
View File

@ -247,20 +247,26 @@ func (n Name) ToRDNSequence() (ret RDNSequence) {
// String returns the string form of n, roughly following
// the RFC 2253 Distinguished Names syntax.
func (n Name) String() string {
if len(n.ExtraNames) == 0 {
var rdns RDNSequence
// If there are no ExtraNames, surface the parsed value (all entries in
// Names) instead.
if n.ExtraNames == nil {
for _, atv := range n.Names {
t := atv.Type
if len(t) == 4 && t[0] == 2 && t[1] == 5 && t[2] == 4 {
switch t[3] {
case 3, 5, 6, 7, 8, 9, 10, 11, 17:
// These attributes are already parsed into named fields.
// These attributes were already parsed into named fields.
continue
}
}
n.ExtraNames = append(n.ExtraNames, atv)
// Place non-standard parsed values at the beginning of the sequence
// so they will be at the end of the string. See Issue 39924.
rdns = append(rdns, []AttributeTypeAndValue{atv})
}
}
return n.ToRDNSequence().String()
rdns = append(rdns, n.ToRDNSequence()...)
return rdns.String()
}
// oidInAttributeTypeAndValue reports whether a type with the given OID exists

39
src/crypto/x509/x509_test.go
View File

@ -2076,10 +2076,31 @@ func TestPKIXNameString(t *testing.T) {
t.Fatal(err)
}
// Check that parsed non-standard attributes are printed.
rdns := pkix.Name{
Locality: []string{"Gophertown"},
ExtraNames: []pkix.AttributeTypeAndValue{
{Type: asn1.ObjectIdentifier([]int{1, 2, 3, 4, 5}), Value: "golang.org"}},
}.ToRDNSequence()
nn := pkix.Name{}
nn.FillFromRDNSequence(&rdns)
// Check that zero-length non-nil ExtraNames hide Names.
extra := []pkix.AttributeTypeAndValue{
{Type: asn1.ObjectIdentifier([]int{1, 2, 3, 4, 5}), Value: "backing array"}}
extraNotNil := pkix.Name{
Locality: []string{"Gophertown"},
ExtraNames: extra[:0],
Names: []pkix.AttributeTypeAndValue{
{Type: asn1.ObjectIdentifier([]int{1, 2, 3, 4, 5}), Value: "golang.org"}},
}
tests := []struct {
dn pkix.Name
want string
}{
{nn, "L=Gophertown,1.2.3.4.5=#130a676f6c616e672e6f7267"},
{extraNotNil, "L=Gophertown"},
{pkix.Name{
CommonName: "Steve Kille",
Organization: []string{"Isode Limited"},
@ -2108,6 +2129,20 @@ func TestPKIXNameString(t *testing.T) {
ExtraNames: []pkix.AttributeTypeAndValue{
{Type: asn1.ObjectIdentifier([]int{1, 2, 3, 4, 5}), Value: "golang.org"}},
}, "1.2.3.4.5=#130a676f6c616e672e6f7267,L=Gophertown"},
// If there are no ExtraNames, the Names are printed instead.
{pkix.Name{
Locality: []string{"Gophertown"},
Names: []pkix.AttributeTypeAndValue{
{Type: asn1.ObjectIdentifier([]int{1, 2, 3, 4, 5}), Value: "golang.org"}},
}, "L=Gophertown,1.2.3.4.5=#130a676f6c616e672e6f7267"},
// If there are both, print only the ExtraNames.
{pkix.Name{
Locality: []string{"Gophertown"},
ExtraNames: []pkix.AttributeTypeAndValue{
{Type: asn1.ObjectIdentifier([]int{1, 2, 3, 4, 5}), Value: "golang.org"}},
Names: []pkix.AttributeTypeAndValue{
{Type: asn1.ObjectIdentifier([]int{1, 2, 3, 4, 6}), Value: "example.com"}},
}, "1.2.3.4.5=#130a676f6c616e672e6f7267,L=Gophertown"},
}
for i, test := range tests {
@ -2115,6 +2150,10 @@ func TestPKIXNameString(t *testing.T) {
t.Errorf("#%d: String() = \n%s\n, want \n%s", i, got, test.want)
}
}
if extra[0].Value != "backing array" {
t.Errorf("the backing array of an empty ExtraNames got modified by String")
}
}
func TestRDNSequenceString(t *testing.T) {