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crypto/x509: don't include empty additional primes in PKCS#1 private key.
asn1 didn't have an omitempty tag, so the list of additional primes in an RSA private key was serialised as an empty SEQUENCE, even for version 1 structures. This tripped up external code that didn't handle v2. R=golang-dev, r CC=golang-dev https://golang.org/cl/5729062
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@ -24,7 +24,7 @@ type pkcs1PrivateKey struct {
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Dq *big.Int `asn1:"optional"`
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Qinv *big.Int `asn1:"optional"`
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AdditionalPrimes []pkcs1AdditionalRSAPrime `asn1:"optional"`
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AdditionalPrimes []pkcs1AdditionalRSAPrime `asn1:"optional,omitempty"`
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}
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type pkcs1AdditionalRSAPrime struct {
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@ -321,7 +321,7 @@ var parseFieldParametersTestData []parseFieldParametersTest = []parseFieldParame
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{"default:42", fieldParameters{defaultValue: newInt64(42)}},
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{"tag:17", fieldParameters{tag: newInt(17)}},
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{"optional,explicit,default:42,tag:17", fieldParameters{optional: true, explicit: true, defaultValue: newInt64(42), tag: newInt(17)}},
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{"optional,explicit,default:42,tag:17,rubbish1", fieldParameters{true, true, false, newInt64(42), newInt(17), 0, false}},
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{"optional,explicit,default:42,tag:17,rubbish1", fieldParameters{true, true, false, newInt64(42), newInt(17), 0, false, false}},
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{"set", fieldParameters{set: true}},
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}
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@ -75,6 +75,7 @@ type fieldParameters struct {
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tag *int // the EXPLICIT or IMPLICIT tag (maybe nil).
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stringType int // the string tag to use when marshaling.
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set bool // true iff this should be encoded as a SET
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omitEmpty bool // true iff this should be omitted if empty when marshaling.
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// Invariants:
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// if explicit is set, tag is non-nil.
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@ -116,6 +117,8 @@ func parseFieldParameters(str string) (ret fieldParameters) {
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if ret.tag == nil {
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ret.tag = new(int)
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}
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case part == "omitempty":
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ret.omitEmpty = true
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}
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}
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return
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@ -463,6 +463,10 @@ func marshalField(out *forkableWriter, v reflect.Value, params fieldParameters)
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return marshalField(out, v.Elem(), params)
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}
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if v.Kind() == reflect.Slice && v.Len() == 0 && params.omitEmpty {
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return
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}
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if params.optional && reflect.DeepEqual(v.Interface(), reflect.Zero(v.Type()).Interface()) {
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return
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}
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@ -54,6 +54,10 @@ type optionalRawValueTest struct {
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A RawValue `asn1:"optional"`
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}
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type omitEmptyTest struct {
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A []string `asn1:"omitempty"`
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}
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type testSET []int
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var PST = time.FixedZone("PST", -8*60*60)
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@ -116,6 +120,8 @@ var marshalTests = []marshalTest{
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{rawContentsStruct{[]byte{0x30, 3, 1, 2, 3}, 64}, "3003010203"},
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{RawValue{Tag: 1, Class: 2, IsCompound: false, Bytes: []byte{1, 2, 3}}, "8103010203"},
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{testSET([]int{10}), "310302010a"},
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{omitEmptyTest{[]string{}}, "3000"},
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{omitEmptyTest{[]string{"1"}}, "30053003130131"},
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}
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func TestMarshal(t *testing.T) {
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