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crypto/x509: allow MS/NS SCG key usage as ServerAuth.
By default, crypto/x509 assumes that users wish to validate certificates for ServerAuth. However, due to historical reasons, COMODO's intermediates don't specify ServerAuth as an allowed key usage. Rather NSS and CryptoAPI both allow these SGC OIDs to be equivalent to ServerAuth. R=rsc CC=golang-dev https://golang.org/cl/7312070
This commit is contained in:
Adam Langley
parent
691e5e3b01
commit
e1c309e792
@ -389,6 +389,14 @@ func checkChainForKeyUsage(chain []*Certificate, keyUsages []ExtKeyUsage) bool {
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for _, usage := range cert.ExtKeyUsage {
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if requestedUsage == usage {
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continue NextRequestedUsage
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} else if requestedUsage == ExtKeyUsageServerAuth &&
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(usage == ExtKeyUsageNetscapeServerGatedCrypto ||
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usage == ExtKeyUsageMicrosoftServerGatedCrypto) {
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// In order to support COMODO
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// certificate chains, we have to
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// accept Netscape or Microsoft SGC
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// usages as equal to ServerAuth.
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continue NextRequestedUsage
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}
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}
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@ -158,6 +158,16 @@ var verifyTests = []verifyTest{
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{"Ryan Hurst", "GlobalSign PersonalSign 2 CA - G2"},
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},
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},
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{
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leaf: megaLeaf,
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intermediates: []string{comodoIntermediate1},
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roots: []string{comodoRoot},
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currentTime: 1360431182,
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expectedChains: [][]string{
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{"mega.co.nz", "EssentialSSL CA", "COMODO Certification Authority"},
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},
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},
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}
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func expectHostnameError(t *testing.T, i int, err error) (ok bool) {
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@ -563,3 +573,90 @@ YEvTWbWwGdPytDFPYIl3/6OqNSXSnZ7DxPcdLJq2uyiga8PB/TTIIHYkdM2+1DE0
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2FQOZ7/2k4uYoOdBTSlb8kTAuzZNgIE0rB2BIYCTz/P6zZIKW0ogbRSH
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-----END CERTIFICATE-----`
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var megaLeaf = `-----BEGIN CERTIFICATE-----
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bWVnYS5jby5uejANBgkqhkiG9w0BAQUFAAOCAQEAcYhrsPSvDuwihMOh0ZmRpbOE
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ivtuhBTgKO1VYB/VRoAt6Lmswg3YqyiS7JiLDZxjoV7KoS5xdiaINfHDUaBBY4ZH
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UXp08U0LBqoqG130FbzEJBBV3ixbvY6BWMHoCWuaoF12KJnC5kHt2RoWAAgMXA==
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-----END CERTIFICATE-----`
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var comodoIntermediate1 = `-----BEGIN CERTIFICATE-----
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MIIFAzCCA+ugAwIBAgIQGLLLuqME8aAPwfLzJkYqSjANBgkqhkiG9w0BAQUFADCB
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dGVyIE1hbmNoZXN0ZXIxEDAOBgNVBAcTB1NhbGZvcmQxGjAYBgNVBAoTEUNPTU9E
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5I5ZLdOWIY120j8YC0YZYwvHIPPlC92AGvFaoL0dds23Izp0XmEbdaqb1IX04XiR
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-----END CERTIFICATE-----`
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var comodoRoot = `-----BEGIN CERTIFICATE-----
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MIIEHTCCAwWgAwIBAgIQToEtioJl4AsC7j41AkblPTANBgkqhkiG9w0BAQUFADCB
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ZQ==
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-----END CERTIFICATE-----`
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@ -370,6 +370,8 @@ var (
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oidExtKeyUsageIPSECUser = asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 3, 7}
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oidExtKeyUsageTimeStamping = asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 3, 8}
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oidExtKeyUsageOCSPSigning = asn1.ObjectIdentifier{1, 3, 6, 1, 5, 5, 7, 3, 9}
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oidExtKeyUsageMicrosoftServerGatedCrypto = asn1.ObjectIdentifier{1, 3, 6, 1, 4, 1, 311, 10, 3, 3}
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oidExtKeyUsageNetscapeServerGatedCrypto = asn1.ObjectIdentifier{2, 16, 840, 1, 113730, 4, 1}
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)
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// ExtKeyUsage represents an extended set of actions that are valid for a given key.
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@ -387,6 +389,8 @@ const (
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ExtKeyUsageIPSECUser
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ExtKeyUsageTimeStamping
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ExtKeyUsageOCSPSigning
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ExtKeyUsageMicrosoftServerGatedCrypto
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ExtKeyUsageNetscapeServerGatedCrypto
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)
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// extKeyUsageOIDs contains the mapping between an ExtKeyUsage and its OID.
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@ -404,6 +408,8 @@ var extKeyUsageOIDs = []struct {
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{ExtKeyUsageIPSECUser, oidExtKeyUsageIPSECUser},
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{ExtKeyUsageTimeStamping, oidExtKeyUsageTimeStamping},
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{ExtKeyUsageOCSPSigning, oidExtKeyUsageOCSPSigning},
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{ExtKeyUsageMicrosoftServerGatedCrypto, oidExtKeyUsageMicrosoftServerGatedCrypto},
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{ExtKeyUsageNetscapeServerGatedCrypto, oidExtKeyUsageNetscapeServerGatedCrypto},
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}
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func extKeyUsageFromOID(oid asn1.ObjectIdentifier) (eku ExtKeyUsage, ok bool) {
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