func main() {
var err error
var ofhandle *os.File
ofhandle, err = os.Create(os.Args[1])
if err != nil {
log.Fatal(err)
}
var privhandle *os.File
privhandle, err = os.Open(os.Args[2])
if err != nil {
log.Fatal(err)
}
var privreader *bufio.Reader
privreader = bufio.NewReader(privhandle)
var group *bbssig.Group = new(bbssig.Group)
var privkey *bbssig.PrivateKey = new(bbssig.PrivateKey)
var part *bbssig.MemberKey = new(bbssig.MemberKey)
var randreader *os.File
randreader, err = os.Open("/dev/random")
if err != nil {
log.Fatal(err)
}
var gb []byte
{
gb = basepack.Unpack(privreader)
var success bool
_, success = group.Unmarshal(gb)
if !success {
log.Fatal("Unable to unpack group data")
}
var pb = basepack.Unpack(privreader)
_, success = privkey.Unmarshal(group, pb)
if !success {
log.Fatal("Unable to unpack private key")
}
}
part, err = privkey.NewMember(randreader)
if err != nil {
log.Fatal(err)
}
{
var partbyte = part.Marshal()
objpack.PackGroup(ofhandle, part.Group)
basepack.Packout(ofhandle, partbyte)
fmt.Printf("Tag for part is ")
basepack.Packout(os.Stdout, part.Tag())
}
ofhandle.Close()
privhandle.Close()
randreader.Close()
}
func main() {
var err error
var group = new(bbssig.Group)
var sk = new(bbssig.PrivateKey)
var part = new(bbssig.MemberKey)
var rev *bbssig.Revocation
var revbyte []byte
var partfile *os.File
partfile, err = os.Open(os.Args[1])
if err != nil {
log.Fatal(err)
}
var privfile *os.File
privfile, err = os.Open(os.Args[2])
if err != nil {
log.Fatal(err)
}
var partreader = bufio.NewReader(partfile)
var privreader = bufio.NewReader(privfile)
/* Now we have a detail, namely need to skip some stuff from
the part file before we can use it. But first load the
private key*/
{
var gb = basepack.Unpack(privreader)
var success bool
_, success = group.Unmarshal(gb)
if !success {
log.Fatal("Could not load key")
}
var sb = basepack.Unpack(privreader)
_, success = sk.Unmarshal(group, sb)
if !success {
log.Fatal("Could not load private key")
}
}
{
var success bool
basepack.Unpack(partreader) /*Skip first entry*/
var memb = basepack.Unpack(partreader)
_, success = part.Unmarshal(group, memb)
if !success {
log.Fatal("Part could not be upacked")
}
}
rev = sk.GenerateRevocation(part)
revbyte = rev.Marshal()
fmt.Printf("The revokation string is %s\n",
base64.StdEncoding.EncodeToString(revbyte))
}
func main() {
var err error
var group = new(bbssig.Group)
var priv = new(bbssig.PrivateKey)
var privhandle *os.File
privhandle, err = os.Open(os.Args[2])
if err != nil {
log.Fatal(err)
}
var privreader *bufio.Reader
privreader = bufio.NewReader(privhandle)
{
var gp []byte
var success bool
gp = basepack.Unpack(privreader)
_, success = group.Unmarshal(gp)
if !success {
log.Fatal("Unable to read group data")
}
var pb []byte
pb = basepack.Unpack(privreader)
_, success = priv.Unmarshal(group, pb)
if !success {
log.Fatal("Unable to read private key")
}
}
var sig []byte
sig, err = base64.StdEncoding.DecodeString(os.Args[1])
if err != nil {
log.Fatal("Signature is invalid")
}
var tag []byte
var success bool
tag, success = priv.Open(sig)
if !success {
log.Fatal("Signature unknown")
} else {
fmt.Printf("The tag is %s\n", base64.StdEncoding.EncodeToString(tag))
}
}
func main() {
/* Generate parameters for a new ring and store in public and
private. */
var sk *bbssig.PrivateKey
var randread, err = os.Open("/dev/random")
if err != nil {
log.Fatal(err)
}
sk, err = bbssig.GenerateGroup(randread)
if err != nil {
log.Fatal(err)
}
/* Need to output marshelled form of group ring */
var pubhandle *os.File
pubhandle, err = os.Create(os.Args[1])
if err != nil {
log.Fatal(err)
}
objpack.PackGroup(pubhandle, sk.Group)
pubhandle.Close()
/*Now to save private key*/
var priv []byte
var privhandle *os.File
privhandle, err = os.Create(os.Args[2])
if err != nil {
log.Fatal("err")
}
priv = sk.Marshal()
/*TODO: pros and cons of encrypting this file*/
/*We write the group first as it is needed information for
unmarshalling*/
objpack.PackGroup(privhandle, sk.Group)
basepack.Packout(privhandle, priv)
privhandle.Close()
}