| 1 | //go:build linux |
| 2 | |
| 3 | package provisioner |
| 4 | |
| 5 | import ( |
| 6 | "encoding/base64" |
| 7 | "os" |
| 8 | "strings" |
| 9 | |
| 10 | family "amadan.net/rastrillo/rastrillo/crypto" |
| 11 | ) |
| 12 | |
| 13 | type RegistryInfo struct { |
| 14 | Registry string `json:"registry"` |
| 15 | Device string `json:"device"` |
| 16 | PublicKey string `json:"public_key"` |
| 17 | Sequence int64 `json:"sequence"` |
| 18 | } |
| 19 | |
| 20 | // Initialize creates or resumes only the identity already recorded in these |
| 21 | // independent directories. It never replaces a credential or existing floor. |
| 22 | func Initialize(statePath, floorPath string, password []byte) (RegistryInfo, error) { |
| 23 | if statePath == floorPath || strings.HasPrefix(statePath, floorPath+"/") || strings.HasPrefix(floorPath, statePath+"/") { |
| 24 | return RegistryInfo{}, ErrRefused |
| 25 | } |
| 26 | state, e := openPrivateDirectory(statePath) |
| 27 | if e != nil { |
| 28 | return RegistryInfo{}, e |
| 29 | } |
| 30 | defer state.close() |
| 31 | floorDir, e := openPrivateDirectory(floorPath) |
| 32 | if e != nil { |
| 33 | return RegistryInfo{}, e |
| 34 | } |
| 35 | defer floorDir.close() |
| 36 | stateLock, e := state.lock() |
| 37 | if e != nil { |
| 38 | return RegistryInfo{}, e |
| 39 | } |
| 40 | defer stateLock.Close() |
| 41 | floorLock, e := floorDir.lock() |
| 42 | if e != nil { |
| 43 | return RegistryInfo{}, e |
| 44 | } |
| 45 | defer floorLock.Close() |
| 46 | names, e := directoryNames(state) |
| 47 | if e != nil { |
| 48 | return RegistryInfo{}, e |
| 49 | } |
| 50 | present := map[string]bool{} |
| 51 | for _, name := range names { |
| 52 | switch name { |
| 53 | case "lock", "credential.age", "initializing.json", "registry.db", "registry.db-wal", "registry.db-shm": |
| 54 | present[name] = true |
| 55 | default: |
| 56 | return RegistryInfo{}, ErrRefused |
| 57 | } |
| 58 | } |
| 59 | floorNames, e := directoryNames(floorDir) |
| 60 | if e != nil { |
| 61 | return RegistryInfo{}, e |
| 62 | } |
| 63 | var id floorIdentity |
| 64 | var key *family.Keypair |
| 65 | if !present["credential.age"] { |
| 66 | for name := range present { |
| 67 | if name != "lock" { |
| 68 | return RegistryInfo{}, ErrRefused |
| 69 | } |
| 70 | } |
| 71 | for _, name := range floorNames { |
| 72 | if name != "lock" { |
| 73 | return RegistryInfo{}, ErrRefused |
| 74 | } |
| 75 | } |
| 76 | key, e = family.Generate() |
| 77 | if e != nil { |
| 78 | return RegistryInfo{}, ErrUnavailable |
| 79 | } |
| 80 | registry, e := family.NewKey() |
| 81 | if e != nil { |
| 82 | return RegistryInfo{}, ErrUnavailable |
| 83 | } |
| 84 | device, e := family.NewKey() |
| 85 | if e != nil { |
| 86 | return RegistryInfo{}, ErrUnavailable |
| 87 | } |
| 88 | id = floorIdentity{base64.RawURLEncoding.EncodeToString(registry), base64.RawURLEncoding.EncodeToString(device), base64.RawURLEncoding.EncodeToString(key.SignPub())} |
| 89 | wrapped, e := wrapCredential(key, id, password) |
| 90 | if e != nil { |
| 91 | return RegistryInfo{}, e |
| 92 | } |
| 93 | if e = state.create("credential.age", wrapped); e != nil { |
| 94 | return RegistryInfo{}, e |
| 95 | } |
| 96 | } else { |
| 97 | raw, e := state.read("credential.age", 128<<10) |
| 98 | if e != nil { |
| 99 | return RegistryInfo{}, e |
| 100 | } |
| 101 | id, key, e = unwrapCredential(raw, password) |
| 102 | if e != nil { |
| 103 | return RegistryInfo{}, e |
| 104 | } |
| 105 | } |
| 106 | floor, e := newNativeFloor(floorDir, id) |
| 107 | if e != nil { |
| 108 | return RegistryInfo{}, e |
| 109 | } |
| 110 | if present["initializing.json"] { |
| 111 | raw, e := state.read("initializing.json", 8192) |
| 112 | if e != nil { |
| 113 | return RegistryInfo{}, e |
| 114 | } |
| 115 | var signed floorEnvelope |
| 116 | if closedJSON(raw, &signed) != nil || signed.Record.Version != 1 || signed.Record.Identity != id || signed.Record.Point != (floorPoint{}) || signed.Record.Previous != "" { |
| 117 | return RegistryInfo{}, ErrRefused |
| 118 | } |
| 119 | body, e := canonicalJSON(signed.Record) |
| 120 | sig, ok := tokenBytes(signed.Signature, 64) |
| 121 | if e != nil || !ok || !family.Verify(floor.public, floorContext, body, sig) { |
| 122 | return RegistryInfo{}, ErrRefused |
| 123 | } |
| 124 | } else { |
| 125 | if present["registry.db"] { |
| 126 | return RegistryInfo{}, ErrRefused |
| 127 | } |
| 128 | raw, e := floor.signed(key, floorPoint{}, "") |
| 129 | if e != nil { |
| 130 | return RegistryInfo{}, e |
| 131 | } |
| 132 | if e = state.create("initializing.json", raw); e != nil { |
| 133 | return RegistryInfo{}, e |
| 134 | } |
| 135 | } |
| 136 | hasFloor := false |
| 137 | for _, name := range floorNames { |
| 138 | if name != "lock" { |
| 139 | hasFloor = true |
| 140 | } |
| 141 | } |
| 142 | if !hasFloor { |
| 143 | if present["registry.db"] { |
| 144 | return RegistryInfo{}, ErrRefused |
| 145 | } |
| 146 | if e = floor.initialize(key); e != nil { |
| 147 | return RegistryInfo{}, e |
| 148 | } |
| 149 | } else { |
| 150 | if _, _, e = floor.current(); e != nil { |
| 151 | return RegistryInfo{}, e |
| 152 | } |
| 153 | } |
| 154 | j, e := openJournalWithLocks(state, floor, key, true, []*os.File{stateLock, floorLock}, true) |
| 155 | if e != nil { |
| 156 | return RegistryInfo{}, e |
| 157 | } |
| 158 | defer j.close() |
| 159 | point, _, e := floor.current() |
| 160 | if e != nil { |
| 161 | return RegistryInfo{}, e |
| 162 | } |
| 163 | return RegistryInfo{id.Registry, id.Device, id.Public, point.Sequence}, nil |
| 164 | } |
| 165 | |
amadan