frostfs-api-go/util/signature/data.go
Evgenii Stratonikov 2aa3ee46e7 [#27] util/signature: Fix staticcheck warning
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
2023-05-03 14:15:56 +03:00

84 lines
1.7 KiB
Go

package signature
import (
"crypto/ecdsa"
"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
crypto "git.frostfs.info/TrueCloudLab/frostfs-crypto"
)
type DataSource interface {
ReadSignedData([]byte) ([]byte, error)
SignedDataSize() int
}
type DataWithSignature interface {
DataSource
GetSignature() *refs.Signature
SetSignature(*refs.Signature)
}
type SignOption func(*cfg)
type KeySignatureHandler func(*refs.Signature)
type KeySignatureSource func() *refs.Signature
func SignDataWithHandler(key *ecdsa.PrivateKey, src DataSource, handler KeySignatureHandler, opts ...SignOption) error {
if key == nil {
return crypto.ErrEmptyPrivateKey
}
cfg := defaultCfg()
for i := range opts {
opts[i](cfg)
}
buffer := newBufferFromPool(src.SignedDataSize())
defer returnBufferToPool(buffer)
data, err := src.ReadSignedData(buffer.data)
if err != nil {
return err
}
sigData, err := sign(cfg, key, data)
if err != nil {
return err
}
sig := new(refs.Signature)
sig.SetScheme(cfg.scheme)
sig.SetKey(crypto.MarshalPublicKey(&key.PublicKey))
sig.SetSign(sigData)
handler(sig)
return nil
}
func VerifyDataWithSource(dataSrc DataSource, sigSrc KeySignatureSource, opts ...SignOption) error {
cfg := defaultCfg()
for i := range opts {
opts[i](cfg)
}
buffer := newBufferFromPool(dataSrc.SignedDataSize())
defer returnBufferToPool(buffer)
data, err := dataSrc.ReadSignedData(buffer.data)
if err != nil {
return err
}
return verify(cfg, data, sigSrc())
}
func SignData(key *ecdsa.PrivateKey, v DataWithSignature, opts ...SignOption) error {
return SignDataWithHandler(key, v, v.SetSignature, opts...)
}
func VerifyData(src DataWithSignature, opts ...SignOption) error {
return VerifyDataWithSource(src, src.GetSignature, opts...)
}