mirror of
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101 lines
3.8 KiB
Go
101 lines
3.8 KiB
Go
package simplest
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import (
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"encoding/gob"
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"io"
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"github.com/pkg/errors"
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"source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/core/curves"
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"source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/zkp/schnorr"
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)
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// ReceiverStreamOTRun exposes the entire seed OT process for the receiver in "stream mode" to the user.
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// what this means is that instead of calling the component methods in the process manually, and manually handling
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// the encoding and decoding of the resulting output and input structs, the user needs _only_ to pass a ReadWriter
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// (in practice this will be something like a websocket object), and this method will handle the entire process.
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// this serves the dual (though related) purpose of conveniently bundling up the entire seed OT process,
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// for use in tests, both in this package, as well as in the other packages which use this one (like cOT and mult).
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func ReceiverStreamOTRun(receiver *Receiver, rw io.ReadWriter) error {
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enc := gob.NewEncoder(rw)
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dec := gob.NewDecoder(rw)
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gob.Register(&curves.ScalarK256{})
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gob.Register(&curves.PointK256{})
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proof := &schnorr.Proof{}
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if err := dec.Decode(proof); err != nil {
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return errors.Wrap(err, "failed to decode proof in receiver stream OT")
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}
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receiversMaskedChoice, err := receiver.Round2VerifySchnorrAndPadTransfer(proof)
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if err != nil {
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return errors.Wrap(err, "error in round 2 in receiver stream OT")
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}
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if err = enc.Encode(receiversMaskedChoice); err != nil {
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return errors.Wrap(err, "error encoding result of round 1 in receiver stream OT")
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}
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var challenge []OtChallenge
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err = dec.Decode(&challenge)
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if err != nil {
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return errors.Wrap(err, "error decoding challenge in receiver stream OT")
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}
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challengeResponse, err := receiver.Round4RespondToChallenge(challenge)
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if err != nil {
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return errors.Wrap(err, "error computing round 2 challenge response in receiver stream OT")
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}
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if err = enc.Encode(challengeResponse); err != nil {
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return errors.Wrap(err, "error encoding challenge response in receiver stream OT")
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}
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var openings []ChallengeOpening
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err = dec.Decode(&openings)
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if err != nil {
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return errors.Wrap(err, "error decoding challenge openings in receiver stream OT")
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}
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return receiver.Round6Verify(openings)
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}
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// SenderStreamOTRun exposes the entire seed OT process for the sender in "stream mode" to the user.
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// similarly to the above, this means that the user needs only to pass a `ReadWriter` representing the comm channel;
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// this method will handle all encoding and decoding + writing and reading to the channel.
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func SenderStreamOTRun(sender *Sender, rw io.ReadWriter) error {
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// again a high-level helper method showing the overall flow, this time for the sender.
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enc := gob.NewEncoder(rw)
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dec := gob.NewDecoder(rw)
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gob.Register(&curves.ScalarK256{})
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gob.Register(&curves.PointK256{})
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proof, err := sender.Round1ComputeAndZkpToPublicKey()
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if err != nil {
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return err
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}
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if err = enc.Encode(proof); err != nil {
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return err
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}
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var receiversMaskedChoice []ReceiversMaskedChoices
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err = dec.Decode(&receiversMaskedChoice)
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if err != nil {
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return errors.Wrap(err, "error decoding receiver's masked choice in sender stream OT")
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}
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challenge, err := sender.Round3PadTransfer(receiversMaskedChoice)
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if err != nil {
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return errors.Wrap(err, "error during round 2 pad transfer in sender stream OT")
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}
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err = enc.Encode(challenge)
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if err != nil {
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return errors.Wrap(err, "error encoding challenge in sender stream OT")
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}
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var challengeResponses []OtChallengeResponse
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err = dec.Decode(&challengeResponses)
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if err != nil {
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return errors.Wrap(err, "error decoding challenges responses in sender stream OT")
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}
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opening, err := sender.Round5Verify(challengeResponses)
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if err != nil {
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return errors.Wrap(err, "error in round 3 verify in sender stream OT")
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}
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return enc.Encode(opening)
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}
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