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[sync] crypto/x509: restrict CRL number to <=20 octets #69

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Sun Yimin 2022-07-15 10:25:53 +08:00 committed by GitHub
parent 99bfac3a2b
commit 7e81d05ce9
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 37 additions and 0 deletions
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3
smx509/x509.go
View File

@ -1909,6 +1909,9 @@ func CreateRevocationList(rand io.Reader, template *x509.RevocationList, issuer
if err != nil {
return nil, err
}
if numBytes := template.Number.Bytes(); len(numBytes) > 20 || (len(numBytes) == 20 && numBytes[0]&0x80 != 0) {
return nil, errors.New("x509: CRL number exceeds 20 octets")
}
crlNum, err := asn1.Marshal(template.Number)
if err != nil {
return nil, err

34
smx509/x509_test.go
View File

@ -1789,6 +1789,40 @@ func TestCreateRevocationList(t *testing.T) {
},
expectedError: "x509: template contains nil Number field",
},
{
name: "long Number",
key: sm2Priv,
issuer: &x509.Certificate{
KeyUsage: KeyUsageCRLSign,
Subject: pkix.Name{
CommonName: "testing",
},
SubjectKeyId: []byte{1, 2, 3},
},
template: &x509.RevocationList{
ThisUpdate: time.Time{}.Add(time.Hour * 24),
NextUpdate: time.Time{}.Add(time.Hour * 48),
Number: big.NewInt(0).SetBytes(append([]byte{1}, make([]byte, 20)...)),
},
expectedError: "x509: CRL number exceeds 20 octets",
},
{
name: "long Number (20 bytes, MSB set)",
key: sm2Priv,
issuer: &x509.Certificate{
KeyUsage: KeyUsageCRLSign,
Subject: pkix.Name{
CommonName: "testing",
},
SubjectKeyId: []byte{1, 2, 3},
},
template: &x509.RevocationList{
ThisUpdate: time.Time{}.Add(time.Hour * 24),
NextUpdate: time.Time{}.Add(time.Hour * 48),
Number: big.NewInt(0).SetBytes(append([]byte{255}, make([]byte, 19)...)),
},
expectedError: "x509: CRL number exceeds 20 octets",
},
{
name: "invalid signature algorithm",
key: sm2Priv,