Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| package gaf | ||
|
|
||
| import ( | ||
| "archive/zip" | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| "io" | ||
| ) | ||
|
|
||
| // ErrMaformedGaf denotes the error for failed extraction of a gaf | ||
| // due to it being malformed. | ||
| var ErrMaformedGaf = errors.New("unable to extract malformed gaf") | ||
|
|
||
| // ReadClosers holds ReadClosers for the content of the gaf file. | ||
| type ReadClosers struct { | ||
| MBRRC io.ReadCloser | ||
| BootRC io.ReadCloser | ||
| RootRC io.ReadCloser | ||
| SBOMRC io.ReadCloser | ||
| } | ||
|
|
||
| const ( | ||
| MBR string = "mbr.img" | ||
| Boot string = "boot.img" | ||
| Root string = "root.img" | ||
| SBOM string = "sbom.json" | ||
| ) | ||
|
|
||
| // Extract extracts the content of a gaf archive. | ||
| func Extract(ctx context.Context, source io.ReaderAt, size int64) (ReadClosers, error) { | ||
| gafRCs := ReadClosers{} | ||
|
|
||
| reader, err := zip.NewReader(source, size) | ||
| if err != nil { | ||
| return gafRCs, fmt.Errorf("error reading from zip reader: %w", err) | ||
| } | ||
|
|
||
| // Check the gaf archive contains the files described in the gaf spec. | ||
| for _, file := range reader.File { | ||
| switch file.Name { | ||
| case MBR: | ||
| reader, err := file.Open() | ||
| if err != nil { | ||
| return ReadClosers{}, err | ||
| } | ||
| gafRCs.MBRRC = reader | ||
|
|
||
| case Boot: | ||
| reader, err := file.Open() | ||
| if err != nil { | ||
| return ReadClosers{}, err | ||
| } | ||
| gafRCs.BootRC = reader | ||
|
|
||
| case Root: | ||
| reader, err := file.Open() | ||
| if err != nil { | ||
| return ReadClosers{}, err | ||
| } | ||
| gafRCs.RootRC = reader | ||
|
|
||
| case SBOM: | ||
| reader, err := file.Open() | ||
| if err != nil { | ||
| return ReadClosers{}, err | ||
| } | ||
| gafRCs.SBOMRC = reader | ||
| } | ||
| } | ||
|
|
||
| if gafRCs.MBRRC == nil || | ||
| gafRCs.BootRC == nil || | ||
| gafRCs.RootRC == nil || | ||
| gafRCs.SBOMRC == nil { | ||
| return ReadClosers{}, ErrMaformedGaf | ||
| } | ||
|
|
||
| // Unzip archive to readers. | ||
| return gafRCs, nil | ||
| } |