| 1 | package hostfence |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "encoding/json" |
| 6 | "github.com/carlosframework/platform/internal/hostfloor" |
| 7 | "io" |
| 8 | "os" |
| 9 | "path/filepath" |
| 10 | ) |
| 11 | |
| 12 | func ValidateActivationCredentials(raw []byte, bucket, region, role string) error { |
| 13 | c, err := decodeFenceCredentials(bytes.NewReader(raw), bucket) |
| 14 | if err != nil { |
| 15 | return err |
| 16 | } |
| 17 | if region == "" || role == "" || c.Region != region || c.Role != role { |
| 18 | return os.ErrPermission |
| 19 | } |
| 20 | return nil |
| 21 | } |
| 22 | |
| 23 | func ActivationCredentialReceipt(raw []byte) []byte { |
| 24 | receipt, _ := json.Marshal(struct { |
| 25 | V int `json:"v"` |
| 26 | SHA256 string `json:"sha256"` |
| 27 | }{1, hostfloor.Digest(raw)}) |
| 28 | return receipt |
| 29 | } |
| 30 | func VerifyActivationCredentialReceipt(raw, receipt []byte) bool { |
| 31 | return bytes.Equal(receipt, ActivationCredentialReceipt(raw)) |
| 32 | } |
| 33 | func activationCredentialReader(f *os.File) (io.Reader, error) { |
| 34 | raw, err := io.ReadAll(io.LimitReader(f, 16385)) |
| 35 | if err != nil || len(raw) > 16384 { |
| 36 | return nil, os.ErrPermission |
| 37 | } |
| 38 | receipt, err := hostfloor.OpenProtected(filepath.Join(filepath.Dir(f.Name()), "credentials.installation.json")) |
| 39 | if err != nil { |
| 40 | return nil, err |
| 41 | } |
| 42 | defer receipt.Close() |
| 43 | st, err := receipt.Stat() |
| 44 | if err != nil || st.Mode().Perm() != 0600 { |
| 45 | return nil, os.ErrPermission |
| 46 | } |
| 47 | wire, err := io.ReadAll(io.LimitReader(receipt, 1025)) |
| 48 | if err != nil || !VerifyActivationCredentialReceipt(raw, wire) { |
| 49 | return nil, os.ErrPermission |
| 50 | } |
| 51 | return bytes.NewReader(raw), nil |
| 52 | } |
| 53 | |
amadan