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| 1 | +/* |
| 2 | +Copyright 2019 The Kubernetes Authors. |
| 3 | +
|
| 4 | +Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | +you may not use this file except in compliance with the License. |
| 6 | +You may obtain a copy of the License at |
| 7 | +
|
| 8 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +
|
| 10 | +Unless required by applicable law or agreed to in writing, software |
| 11 | +distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | +See the License for the specific language governing permissions and |
| 14 | +limitations under the License. |
| 15 | +*/ |
| 16 | + |
| 17 | +package v1beta2 |
| 18 | + |
| 19 | +import ( |
| 20 | + "fmt" |
| 21 | + "strings" |
| 22 | + |
| 23 | + "github.com/pkg/errors" |
| 24 | + |
| 25 | + bootstrapapi "k8s.io/cluster-bootstrap/token/api" |
| 26 | + bootstraputil "k8s.io/cluster-bootstrap/token/util" |
| 27 | +) |
| 28 | + |
| 29 | +// BootstrapTokenString is a token of the format abcdef.abcdef0123456789 that is used |
| 30 | +// for both validation of the practically of the API server from a joining node's point |
| 31 | +// of view and as an authentication method for the node in the bootstrap phase of |
| 32 | +// "kubeadm join". This token is and should be short-lived |
| 33 | +type BootstrapTokenString struct { |
| 34 | + ID string |
| 35 | + Secret string |
| 36 | +} |
| 37 | + |
| 38 | +// MarshalJSON implements the json.Marshaler interface. |
| 39 | +func (bts BootstrapTokenString) MarshalJSON() ([]byte, error) { |
| 40 | + return []byte(fmt.Sprintf(`"%s"`, bts.String())), nil |
| 41 | +} |
| 42 | + |
| 43 | +// UnmarshalJSON implements the json.Unmarshaller interface. |
| 44 | +func (bts *BootstrapTokenString) UnmarshalJSON(b []byte) error { |
| 45 | + // If the token is represented as "", just return quickly without an error |
| 46 | + if len(b) == 0 { |
| 47 | + return nil |
| 48 | + } |
| 49 | + |
| 50 | + // Remove unnecessary " characters coming from the JSON parser |
| 51 | + token := strings.Replace(string(b), `"`, ``, -1) |
| 52 | + // Convert the string Token to a BootstrapTokenString object |
| 53 | + newbts, err := NewBootstrapTokenString(token) |
| 54 | + if err != nil { |
| 55 | + return err |
| 56 | + } |
| 57 | + bts.ID = newbts.ID |
| 58 | + bts.Secret = newbts.Secret |
| 59 | + return nil |
| 60 | +} |
| 61 | + |
| 62 | +// String returns the string representation of the BootstrapTokenString |
| 63 | +func (bts BootstrapTokenString) String() string { |
| 64 | + if len(bts.ID) > 0 && len(bts.Secret) > 0 { |
| 65 | + return bootstraputil.TokenFromIDAndSecret(bts.ID, bts.Secret) |
| 66 | + } |
| 67 | + return "" |
| 68 | +} |
| 69 | + |
| 70 | +// NewBootstrapTokenString converts the given Bootstrap Token as a string |
| 71 | +// to the BootstrapTokenString object used for serialization/deserialization |
| 72 | +// and internal usage. It also automatically validates that the given token |
| 73 | +// is of the right format |
| 74 | +func NewBootstrapTokenString(token string) (*BootstrapTokenString, error) { |
| 75 | + substrs := bootstraputil.BootstrapTokenRegexp.FindStringSubmatch(token) |
| 76 | + // TODO: Add a constant for the 3 value here, and explain better why it's needed (other than because how the regexp parsin works) |
| 77 | + if len(substrs) != 3 { |
| 78 | + return nil, errors.Errorf("the bootstrap token %q was not of the form %q", token, bootstrapapi.BootstrapTokenPattern) |
| 79 | + } |
| 80 | + |
| 81 | + return &BootstrapTokenString{ID: substrs[1], Secret: substrs[2]}, nil |
| 82 | +} |
| 83 | + |
| 84 | +// NewBootstrapTokenStringFromIDAndSecret is a wrapper around NewBootstrapTokenString |
| 85 | +// that allows the caller to specify the ID and Secret separately |
| 86 | +func NewBootstrapTokenStringFromIDAndSecret(id, secret string) (*BootstrapTokenString, error) { |
| 87 | + return NewBootstrapTokenString(bootstraputil.TokenFromIDAndSecret(id, secret)) |
| 88 | +} |
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