作者：IntegerCompan
项目：linaro-android-gc
func parseCertificate(in *certificate) (*Certificate, os.Error) {
out := new(Certificate)
out.Raw = in.TBSCertificate.Raw
out.Signature = in.SignatureValue.RightAlign()
out.SignatureAlgorithm =
getSignatureAlgorithmFromOID(in.TBSCertificate.SignatureAlgorithm.Algorithm)
out.PublicKeyAlgorithm =
getPublicKeyAlgorithmFromOID(in.TBSCertificate.PublicKey.Algorithm.Algorithm)
var err os.Error
out.PublicKey, err = parsePublicKey(out.PublicKeyAlgorithm, in.TBSCertificate.PublicKey.PublicKey.RightAlign())
if err != nil {
return nil, err
}
out.Version = in.TBSCertificate.Version + 1
out.SerialNumber = in.TBSCertificate.SerialNumber.Bytes
out.Issuer.fillFromRDNSequence(&in.TBSCertificate.Issuer)
out.Subject.fillFromRDNSequence(&in.TBSCertificate.Subject)
out.NotBefore = in.TBSCertificate.Validity.NotBefore
out.NotAfter = in.TBSCertificate.Validity.NotAfter
for _, e := range in.TBSCertificate.Extensions {
if len(e.Id) == 4 && e.Id[0] == 2 && e.Id[1] == 5 && e.Id[2] == 29 {
switch e.Id[3] {
case 15:
// RFC 5280, 4.2.1.3
var usageBits asn1.BitString
_, err := asn1.Unmarshal(e.Value, &usageBits)
if err == nil {
var usage int
for i := 0; i < 9; i++ {
if usageBits.At(i) != 0 {
usage |= 1 << uint(i)
}
}
out.KeyUsage = KeyUsage(usage)
continue
}
case 19:
// RFC 5280, 4.2.1.9
var constriants basicConstraints
_, err := asn1.Unmarshal(e.Value, &constriants)
if err == nil {
out.BasicConstraintsValid = true
out.IsCA = constriants.IsCA
out.MaxPathLen = constriants.MaxPathLen
continue
}
case 17:
// RFC 5280, 4.2.1.6
// SubjectAltName ::= GeneralNames
//
// GeneralNames ::= SEQUENCE SIZE (1..MAX) OF GeneralName
//
// GeneralName ::= CHOICE {
// otherName [0] OtherName,
// rfc822Name [1] IA5String,
// dNSName [2] IA5String,
// x400Address [3] ORAddress,
// directoryName [4] Name,
// ediPartyName [5] EDIPartyName,
// uniformResourceIdentifier [6] IA5String,
// iPAddress [7] OCTET STRING,
// registeredID [8] OBJECT IDENTIFIER }
var seq asn1.RawValue
_, err := asn1.Unmarshal(e.Value, &seq)
if err != nil {
return nil, err
}
if !seq.IsCompound || seq.Tag != 16 || seq.Class != 0 {
return nil, asn1.StructuralError{"bad SAN sequence"}
}
parsedName := false
rest := seq.Bytes
for len(rest) > 0 {
var v asn1.RawValue
rest, err = asn1.Unmarshal(rest, &v)
if err != nil {
return nil, err
}
switch v.Tag {
case 1:
out.EmailAddresses = append(out.EmailAddresses, string(v.Bytes))
parsedName = true
case 2:
out.DNSNames = append(out.DNSNames, string(v.Bytes))
parsedName = true
}
}
if parsedName {
continue
}
//.........这里部分代码省略.........
作者：Quantumboos
项目：gc
func parseCertificate(in *certificate) (*Certificate, os.Error) {
out := new(Certificate)
out.Raw = in.Raw
out.RawTBSCertificate = in.TBSCertificate.Raw
out.RawSubjectPublicKeyInfo = in.TBSCertificate.PublicKey.Raw
out.RawSubject = in.TBSCertificate.Subject.FullBytes
out.RawIssuer = in.TBSCertificate.Issuer.FullBytes
out.Signature = in.SignatureValue.RightAlign()
out.SignatureAlgorithm =
getSignatureAlgorithmFromOID(in.TBSCertificate.SignatureAlgorithm.Algorithm)
out.PublicKeyAlgorithm =
getPublicKeyAlgorithmFromOID(in.TBSCertificate.PublicKey.Algorithm.Algorithm)
var err os.Error
out.PublicKey, err = parsePublicKey(out.PublicKeyAlgorithm, &in.TBSCertificate.PublicKey)
if err != nil {
return nil, err
}
if in.TBSCertificate.SerialNumber.Sign() < 0 {
return nil, os.NewError("negative serial number")
}
out.Version = in.TBSCertificate.Version + 1
out.SerialNumber = in.TBSCertificate.SerialNumber
var issuer, subject pkix.RDNSequence
if _, err := asn1.Unmarshal(in.TBSCertificate.Subject.FullBytes, &subject); err != nil {
return nil, err
}
if _, err := asn1.Unmarshal(in.TBSCertificate.Issuer.FullBytes, &issuer); err != nil {
return nil, err
}
out.Issuer.FillFromRDNSequence(&issuer)
out.Subject.FillFromRDNSequence(&subject)
out.NotBefore = in.TBSCertificate.Validity.NotBefore
out.NotAfter = in.TBSCertificate.Validity.NotAfter
for _, e := range in.TBSCertificate.Extensions {
if len(e.Id) == 4 && e.Id[0] == 2 && e.Id[1] == 5 && e.Id[2] == 29 {
switch e.Id[3] {
case 15:
// RFC 5280, 4.2.1.3
var usageBits asn1.BitString
_, err := asn1.Unmarshal(e.Value, &usageBits)
if err == nil {
var usage int
for i := 0; i < 9; i++ {
if usageBits.At(i) != 0 {
usage |= 1 << uint(i)
}
}
out.KeyUsage = KeyUsage(usage)
continue
}
case 19:
// RFC 5280, 4.2.1.9
var constraints basicConstraints
_, err := asn1.Unmarshal(e.Value, &constraints)
if err == nil {
out.BasicConstraintsValid = true
out.IsCA = constraints.IsCA
out.MaxPathLen = constraints.MaxPathLen
continue
}
case 17:
// RFC 5280, 4.2.1.6
// SubjectAltName ::= GeneralNames
//
// GeneralNames ::= SEQUENCE SIZE (1..MAX) OF GeneralName
//
// GeneralName ::= CHOICE {
// otherName [0] OtherName,
// rfc822Name [1] IA5String,
// dNSName [2] IA5String,
// x400Address [3] ORAddress,
// directoryName [4] Name,
// ediPartyName [5] EDIPartyName,
// uniformResourceIdentifier [6] IA5String,
// iPAddress [7] OCTET STRING,
// registeredID [8] OBJECT IDENTIFIER }
var seq asn1.RawValue
_, err := asn1.Unmarshal(e.Value, &seq)
if err != nil {
return nil, err
}
if !seq.IsCompound || seq.Tag != 16 || seq.Class != 0 {
return nil, asn1.StructuralError{"bad SAN sequence"}
}
parsedName := false
rest := seq.Bytes
for len(rest) > 0 {
//.........这里部分代码省略.........
