go.temporal.io/server/common/checksum/crc.go
67 LOC · 19 covered · 48 uncovered · 6 ranges · 1 concepts · 1 introducers · 1 tests
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package checksum
import (
"bytes"
"encoding/binary"
"errors"
"fmt"
"hash/crc32"
enumsspb "go.temporal.io/server/api/enums/v1"
persistencespb "go.temporal.io/server/api/persistence/v1"
)
// ErrMismatch indicates a checksum verification failure due to
// a derived checksum not being equal to expected checksum
var ErrMismatch = errors.New("checksum mismatch error")
type Marshaler interface {
Marshal() ([]byte, error)
}
// GenerateCRC32 generates an IEEE crc32 checksum on the
// serilized byte array of the given thrift object. The
// serialization proto used will be of type thriftRW
func GenerateCRC32(
payload Marshaler,
payloadVersion int32,
payloadBytes, err := payload.Marshal()
if err != nil {
return nil, err
}
checksum := make([]byte, 4)
binary.BigEndian.PutUint32(checksum, crc)
return &persistencespb.Checksum{
Value: checksum,
Version: payloadVersion,
Flavor: enumsspb.CHECKSUM_FLAVOR_IEEE_CRC32_OVER_PROTO3_BINARY,
}, nil
}
// Verify verifies that the checksum generated from the
// given thrift object matches the specified expected checksum
// Return ErrMismatch when checksums mismatch
func Verify(
payload Marshaler,
checksum *persistencespb.Checksum,
if checksum.Flavor != enumsspb.CHECKSUM_FLAVOR_IEEE_CRC32_OVER_PROTO3_BINARY {
return fmt.Errorf("unknown checksum flavor %v", checksum.Flavor)
}
if err != nil {
return err
}
return ErrMismatch
}
}