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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,231 @@ | ||
| // Copyright © 2018 Immutability, LLC | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/hex" | ||
| "fmt" | ||
|
|
||
| "github.com/btcsuite/btcd/btcec" | ||
| jwt "github.com/dgrijalva/jwt-go" | ||
| "github.com/ethereum/go-ethereum/common/hexutil" | ||
| "github.com/ethereum/go-ethereum/crypto" | ||
| "github.com/hashicorp/vault/logical" | ||
| "github.com/hashicorp/vault/logical/framework" | ||
| ) | ||
|
|
||
| // Audience is a public key known to vault. A Trustee has an address (Ethereum-compatible) | ||
| type Audience struct { | ||
| Address string `json:"address"` | ||
| PublicKey string `json:"public_key"` | ||
| } | ||
|
|
||
| func audiencesPaths(b *backend) []*framework.Path { | ||
| return []*framework.Path{ | ||
| &framework.Path{ | ||
| Pattern: "audiences/?", | ||
| Callbacks: map[logical.Operation]framework.OperationFunc{ | ||
| logical.ListOperation: b.pathAudiencesList, | ||
| }, | ||
| HelpSynopsis: "List all the audiences at a path", | ||
| HelpDescription: ` | ||
| All the trustees will be listed. | ||
| `, | ||
| }, | ||
| &framework.Path{ | ||
| Pattern: "audiences/" + framework.GenericNameRegex("name"), | ||
| HelpSynopsis: "Create an audience using trustee JWT", | ||
| HelpDescription: ` | ||
| Creates (or updates) an audience. | ||
| `, | ||
| Fields: map[string]*framework.FieldSchema{ | ||
| "name": &framework.FieldSchema{Type: framework.TypeString}, | ||
| "token": &framework.FieldSchema{ | ||
| Type: framework.TypeString, | ||
| Description: "Trustee token (JWT).", | ||
| }, | ||
| }, | ||
| ExistenceCheck: b.pathExistenceCheck, | ||
| Callbacks: map[logical.Operation]framework.OperationFunc{ | ||
| logical.ReadOperation: b.pathAudiencesRead, | ||
| logical.CreateOperation: b.pathAudiencesCreate, | ||
| logical.DeleteOperation: b.pathAudiencesDelete, | ||
| }, | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| func (b *backend) pathAudiencesList(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { | ||
| _, err := b.configured(ctx, req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| vals, err := req.Storage.List(ctx, "audiences/") | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return logical.ListResponse(vals), nil | ||
| } | ||
|
|
||
| func (b *backend) pathAudiencesCreate(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { | ||
| _, err := b.configured(ctx, req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| rawToken := data.Get("token").(string) | ||
| _, pubkey, err := b.verifyClaim(ctx, rawToken) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| publicKeyBytes := crypto.FromECDSAPub(pubkey) | ||
| publicKey := hexutil.Encode(publicKeyBytes) | ||
| address := crypto.PubkeyToAddress(*pubkey) | ||
|
|
||
| audienceJSON := &Audience{ | ||
| Address: address.Hex(), | ||
| PublicKey: publicKey, | ||
| } | ||
| entry, err := logical.StorageEntryJSON(req.Path, audienceJSON) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| err = req.Storage.Put(ctx, entry) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return &logical.Response{ | ||
| Data: map[string]interface{}{ | ||
| "address": audienceJSON.Address, | ||
| }, | ||
| }, nil | ||
| } | ||
|
|
||
| func (b *backend) pathAudiencesRead(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { | ||
| _, err := b.configured(ctx, req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| name := data.Get("name").(string) | ||
| audience, err := b.readAudience(ctx, req, name) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| if audience == nil { | ||
| return nil, nil | ||
| } | ||
|
|
||
| // Return the secret | ||
| return &logical.Response{ | ||
| Data: map[string]interface{}{ | ||
| "address": audience.Address, | ||
| }, | ||
| }, nil | ||
| } | ||
|
|
||
| func (b *backend) readAudience(ctx context.Context, req *logical.Request, name string) (*Audience, error) { | ||
| path := fmt.Sprintf("audiences/%s", name) | ||
| entry, err := req.Storage.Get(ctx, path) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if entry == nil { | ||
| return nil, nil | ||
| } | ||
|
|
||
| var audience Audience | ||
| err = entry.DecodeJSON(&audience) | ||
|
|
||
| if entry == nil { | ||
| return nil, fmt.Errorf("failed to deserialize audience at %s", path) | ||
| } | ||
|
|
||
| return &audience, nil | ||
| } | ||
|
|
||
| func (b *backend) pathAudiencesDelete(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { | ||
| _, err := b.configured(ctx, req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if err := req.Storage.Delete(ctx, req.Path); err != nil { | ||
| return nil, err | ||
| } | ||
| return nil, nil | ||
| } | ||
|
|
||
| func (b *backend) pathEncryptForAudience(ctx context.Context, req *logical.Request, data *framework.FieldData) (*logical.Response, error) { | ||
| _, err := b.configured(ctx, req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| name := data.Get("name").(string) | ||
| plaintext := data.Get("plaintext").(string) | ||
| audience, err := b.readAudience(ctx, req, name) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| ciphertext, err := b.encryptForAudience(ctx, audience, plaintext) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return &logical.Response{ | ||
| Data: map[string]interface{}{ | ||
| "ciphertext": ciphertext, | ||
| }, | ||
| }, nil | ||
|
|
||
| } | ||
|
|
||
| func (b *backend) encryptForAudience(ctx context.Context, audience *Audience, plaintext string) (string, error) { | ||
|
|
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| publicKeyBytes, err := hex.DecodeString(audience.PublicKey) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| pubKey, err := btcec.ParsePubKey(publicKeyBytes, btcec.S256()) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| // Encrypt a message decryptable by the private key corresponding to pubKey | ||
| ciphertextBytes, err := btcec.Encrypt(pubKey, []byte(plaintext)) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| ciphertext := hexutil.Encode(ciphertextBytes) | ||
|
|
||
| return ciphertext, nil | ||
|
|
||
| } | ||
|
|
||
| func (b *backend) encryptClaims(ctx context.Context, audience *Audience, claims jwt.MapClaims) (jwt.MapClaims, error) { | ||
| encryptedClaims := make(jwt.MapClaims) | ||
| for key, value := range claims { | ||
| ciphertext, err := b.encryptForAudience(ctx, audience, value.(string)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| encryptedClaims[key] = ciphertext | ||
| } | ||
| return encryptedClaims, nil | ||
| } |
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