129 lines
3.1 KiB
Go
129 lines
3.1 KiB
Go
package transit
|
|
|
|
import (
|
|
"encoding/base64"
|
|
"fmt"
|
|
|
|
"github.com/hashicorp/vault/helper/certutil"
|
|
"github.com/hashicorp/vault/logical"
|
|
"github.com/hashicorp/vault/logical/framework"
|
|
)
|
|
|
|
func (b *backend) pathRewrap() *framework.Path {
|
|
return &framework.Path{
|
|
Pattern: "rewrap/" + framework.GenericNameRegex("name"),
|
|
Fields: map[string]*framework.FieldSchema{
|
|
"name": &framework.FieldSchema{
|
|
Type: framework.TypeString,
|
|
Description: "Name of the key",
|
|
},
|
|
|
|
"ciphertext": &framework.FieldSchema{
|
|
Type: framework.TypeString,
|
|
Description: "Ciphertext value to rewrap",
|
|
},
|
|
|
|
"context": &framework.FieldSchema{
|
|
Type: framework.TypeString,
|
|
Description: "Context for key derivation. Required for derived keys.",
|
|
},
|
|
},
|
|
|
|
Callbacks: map[logical.Operation]framework.OperationFunc{
|
|
logical.UpdateOperation: b.pathRewrapWrite,
|
|
},
|
|
|
|
HelpSynopsis: pathRewrapHelpSyn,
|
|
HelpDescription: pathRewrapHelpDesc,
|
|
}
|
|
}
|
|
|
|
func (b *backend) pathRewrapWrite(
|
|
req *logical.Request, d *framework.FieldData) (*logical.Response, error) {
|
|
name := d.Get("name").(string)
|
|
|
|
value := d.Get("ciphertext").(string)
|
|
if len(value) == 0 {
|
|
return logical.ErrorResponse("missing ciphertext to decrypt"), logical.ErrInvalidRequest
|
|
}
|
|
|
|
// Decode the context if any
|
|
contextRaw := d.Get("context").(string)
|
|
var context []byte
|
|
if len(contextRaw) != 0 {
|
|
var err error
|
|
context, err = base64.StdEncoding.DecodeString(contextRaw)
|
|
if err != nil {
|
|
return logical.ErrorResponse("failed to decode context as base64"), logical.ErrInvalidRequest
|
|
}
|
|
}
|
|
|
|
// Get the policy
|
|
lp, err := b.policies.getPolicy(req, name)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Error if invalid policy
|
|
if lp == nil {
|
|
return logical.ErrorResponse("policy not found"), logical.ErrInvalidRequest
|
|
}
|
|
|
|
lp.RLock()
|
|
defer lp.RUnlock()
|
|
|
|
// Verify if wasn't deleted before we grabbed the lock
|
|
if lp.policy == nil {
|
|
return nil, fmt.Errorf("no existing policy named %s could be found", name)
|
|
}
|
|
|
|
plaintext, err := lp.policy.Decrypt(context, value)
|
|
if err != nil {
|
|
switch err.(type) {
|
|
case certutil.UserError:
|
|
return logical.ErrorResponse(err.Error()), logical.ErrInvalidRequest
|
|
case certutil.InternalError:
|
|
return nil, err
|
|
default:
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if plaintext == "" {
|
|
return nil, fmt.Errorf("empty plaintext returned during rewrap")
|
|
}
|
|
|
|
ciphertext, err := lp.policy.Encrypt(context, plaintext)
|
|
if err != nil {
|
|
switch err.(type) {
|
|
case certutil.UserError:
|
|
return logical.ErrorResponse(err.Error()), logical.ErrInvalidRequest
|
|
case certutil.InternalError:
|
|
return nil, err
|
|
default:
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if ciphertext == "" {
|
|
return nil, fmt.Errorf("empty ciphertext returned")
|
|
}
|
|
|
|
// Generate the response
|
|
resp := &logical.Response{
|
|
Data: map[string]interface{}{
|
|
"ciphertext": ciphertext,
|
|
},
|
|
}
|
|
return resp, nil
|
|
}
|
|
|
|
const pathRewrapHelpSyn = `Rewrap ciphertext`
|
|
|
|
const pathRewrapHelpDesc = `
|
|
After key rotation, this function can be used to rewrap the
|
|
given ciphertext with the latest version of the named key.
|
|
If the given ciphertext is already using the latest version
|
|
of the key, this function is a no-op.
|
|
`
|