mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
synced 2024-11-15 04:35:17 +00:00
58 lines
2.3 KiB
Go
58 lines
2.3 KiB
Go
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package kos
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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/ot/base/simplest"
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)
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// ReceiverStreamCOtRun exposes an end-to-end "streaming" version of the cOT process for the receiver.
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// this is similar to what we're also doing in the base OT side. the user only passes an arbitrary `ReadWriter` here,
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// together with the relevant inputs (namely a choice vector); this method handles all parts of the process,
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// including both encoding / decoding and writing to / reading from the stream.
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func ReceiverStreamCOtRun(receiver *Receiver, hashKeySeed [simplest.DigestSize]byte, choice []byte, rw io.ReadWriter) error {
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enc := gob.NewEncoder(rw)
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dec := gob.NewDecoder(rw)
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firstMessage, err := receiver.Round1Initialize(hashKeySeed, choice)
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if err != nil {
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return errors.Wrap(err, "computing first message in receiver stream cOT")
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}
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if err = enc.Encode(firstMessage); err != nil {
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return errors.Wrap(err, "encoding first message in receiver stream cOT")
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}
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responseTau := &Round2Output{}
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if err = dec.Decode(responseTau); err != nil {
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return errors.Wrap(err, "decoding responseTau in receiver stream OT")
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}
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if err = receiver.Round3Transfer(responseTau); err != nil {
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return errors.Wrap(err, "error during round 3 in receiver stream OT")
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}
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return nil
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}
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// SenderStreamCOtRun exposes the end-to-end "streaming" version of cOT for the sender.
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// the sender should pass an arbitrary ReadWriter together with their input; this will handle the whole process,
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// including all component methods, plus reading to and writing from the network.
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func SenderStreamCOtRun(sender *Sender, hashKeySeed [simplest.DigestSize]byte, input [][]curves.Scalar, rw io.ReadWriter) error {
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enc := gob.NewEncoder(rw)
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dec := gob.NewDecoder(rw)
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firstMessage := &Round1Output{}
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if err := dec.Decode(firstMessage); err != nil {
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return errors.Wrap(err, "decoding first message in sender stream cOT")
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}
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responseTau, err := sender.Round2Transfer(hashKeySeed, input, firstMessage)
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if err != nil {
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return errors.Wrap(err, "error in round 2 in sender stream cOT")
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}
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if err = enc.Encode(responseTau); err != nil {
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return errors.Wrap(err, "encoding responseTau in sender stream cOT")
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}
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return nil
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}
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