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tar/storage: deciding on crc64 for integrity hash

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Vincent Batts 2015-03-03 14:25:09 -05:00
parent 4f1bde4d13
commit d55695834a
1 changed files with 6 additions and 1 deletions
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7
tar/storage/entry.go
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@ -24,10 +24,15 @@ const (
// Entry is a the structure for packing and unpacking the information read from // Entry is a the structure for packing and unpacking the information read from
// the Tar archive. // the Tar archive.
//
// FileType Payload checksum is using `hash/crc64` for basic file integrity,
// _not_ for cryptography.
// From http://www.backplane.com/matt/crc64.html, CRC32 has almost 40,000
// collisions in a sample of 18.2 million, CRC64 had none.
type Entry struct { type Entry struct {
Type Type `json:"type"` Type Type `json:"type"`
Name string `json:"name",omitempty` Name string `json:"name",omitempty`
Size int64 `json:"size",omitempty` Size int64 `json:"size",omitempty`
Payload []byte `json:"payload"` // SegmentType store payload here; FileType store checksum here; Payload []byte `json:"payload"` // SegmentType store payload here; FileType store crc64 checksum here;
Position int `json:"position"` Position int `json:"position"`
} }