123 lines
3.2 KiB
Go
123 lines
3.2 KiB
Go
package signature
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import (
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"crypto/ecdsa"
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"fmt"
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"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
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"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session"
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"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/util/signature"
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"golang.org/x/sync/errgroup"
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)
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type serviceRequest interface {
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GetMetaHeader() *session.RequestMetaHeader
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GetVerificationHeader() *session.RequestVerificationHeader
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SetVerificationHeader(*session.RequestVerificationHeader)
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}
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type serviceResponse interface {
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GetMetaHeader() *session.ResponseMetaHeader
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GetVerificationHeader() *session.ResponseVerificationHeader
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SetVerificationHeader(*session.ResponseVerificationHeader)
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}
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type signatureReceiver interface {
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SetBodySignature(*refs.Signature)
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SetMetaSignature(*refs.Signature)
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SetOriginSignature(*refs.Signature)
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}
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// SignServiceMessage signes service message with key.
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func SignServiceMessage(key *ecdsa.PrivateKey, msg interface{}) error {
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switch v := msg.(type) {
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case nil:
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return nil
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case serviceRequest:
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return signServiceRequest(key, v)
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case serviceResponse:
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return signServiceResponse(key, v)
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default:
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panic(fmt.Sprintf("unsupported session message %T", v))
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}
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}
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func signServiceRequest(key *ecdsa.PrivateKey, v serviceRequest) error {
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result := &session.RequestVerificationHeader{}
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body := serviceMessageBody(v)
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meta := v.GetMetaHeader()
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header := v.GetVerificationHeader()
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if err := signMessageParts(key, body, meta, header, header != nil, result); err != nil {
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return err
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}
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result.SetOrigin(header)
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v.SetVerificationHeader(result)
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return nil
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}
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func signServiceResponse(key *ecdsa.PrivateKey, v serviceResponse) error {
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result := &session.ResponseVerificationHeader{}
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body := serviceMessageBody(v)
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meta := v.GetMetaHeader()
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header := v.GetVerificationHeader()
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if err := signMessageParts(key, body, meta, header, header != nil, result); err != nil {
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return err
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}
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result.SetOrigin(header)
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v.SetVerificationHeader(result)
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return nil
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}
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func signMessageParts(key *ecdsa.PrivateKey, body, meta, header stableMarshaler, hasHeader bool, result signatureReceiver) error {
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eg := &errgroup.Group{}
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if !hasHeader {
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// sign session message body
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eg.Go(func() error {
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if err := signServiceMessagePart(key, body, result.SetBodySignature); err != nil {
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return fmt.Errorf("could not sign body: %w", err)
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}
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return nil
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})
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}
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// sign meta header
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eg.Go(func() error {
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if err := signServiceMessagePart(key, meta, result.SetMetaSignature); err != nil {
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return fmt.Errorf("could not sign meta header: %w", err)
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}
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return nil
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})
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// sign verification header origin
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eg.Go(func() error {
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if err := signServiceMessagePart(key, header, result.SetOriginSignature); err != nil {
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return fmt.Errorf("could not sign origin of verification header: %w", err)
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}
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return nil
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})
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return eg.Wait()
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}
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func signServiceMessagePart(key *ecdsa.PrivateKey, part stableMarshaler, sigWrite func(*refs.Signature)) error {
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var sig *refs.Signature
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wrapper := StableMarshalerWrapper{
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SM: part,
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}
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// sign part
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if err := signature.SignDataWithHandler(
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key,
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wrapper,
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func(s *refs.Signature) {
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sig = s
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},
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); err != nil {
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return err
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}
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// write part signature
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sigWrite(sig)
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return nil
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}
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