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//
// Copyright (c) SAS Institute Inc.
//
// 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 filetoken
import (
"context"
"crypto"
"crypto/rand"
"crypto/x509"
"fmt"
"io"
"io/ioutil"
"github.com/sassoftware/relic/v7/config"
"github.com/sassoftware/relic/v7/lib/certloader"
"github.com/sassoftware/relic/v7/lib/passprompt"
"github.com/sassoftware/relic/v7/token"
)
const tokenType = "file"
func init() {
token.Openers[tokenType] = Open
}
type fileToken struct {
config *config.Config
tokenConf *config.TokenConfig
prompt passprompt.PasswordGetter
}
type fileKey struct {
keyConf *config.KeyConfig
signer crypto.Signer
cert []byte
}
func Open(conf *config.Config, tokenName string, prompt passprompt.PasswordGetter) (token.Token, error) {
tconf, err := conf.GetToken(tokenName)
if err != nil {
return nil, err
}
return &fileToken{
config: conf,
tokenConf: tconf,
prompt: prompt,
}, nil
}
func (tok *fileToken) Ping(context.Context) error {
return nil
}
func (tok *fileToken) Close() error {
return nil
}
func (tok *fileToken) Config() *config.TokenConfig {
return tok.tokenConf
}
func (tok *fileToken) ListKeys(opts token.ListOptions) error {
return token.NotImplementedError{Op: "list-keys", Type: tokenType}
}
func (tok *fileToken) GetKey(ctx context.Context, keyName string) (token.Key, error) {
keyConf, err := tok.config.GetKey(keyName)
if err != nil {
return nil, err
}
if keyConf.KeyFile == "" {
return nil, fmt.Errorf("key \"%s\" needs a KeyFile setting", keyName)
}
blob, err := ioutil.ReadFile(keyConf.KeyFile)
if err != nil {
return nil, err
}
/* TODO: keyring support
loginFunc := func(pin string) (bool, error) {
keyringUser := fmt.Sprintf("%s.%s", tok.tokenConf.Name(), keyName)
if savedPass != "" {
tok.mu.Lock()
defer tok.mu.Unlock()
if err := token.Login(tok.tokenConf, tok.prompt, loginFunc, keyringUser, ""); err != nil {
return nil, err
}
}
*/
var privateKey crypto.PrivateKey
var certBlob []byte
if keyConf.IsPkcs12 {
cert, err := certloader.ParsePKCS12(blob, tok.prompt)
if err != nil {
return nil, err
}
privateKey = cert.PrivateKey
for _, oneCert := range cert.Chain() {
certBlob = append(certBlob, oneCert.Raw...)
}
} else {
var err error
privateKey, err = certloader.ParseAnyPrivateKey(blob, tok.prompt)
if err != nil {
return nil, err
}
}
return &fileKey{
keyConf: keyConf,
signer: privateKey.(crypto.Signer),
cert: certBlob,
}, nil
}
func (key *fileKey) Public() crypto.PublicKey {
return key.signer.Public()
}
func (key *fileKey) Sign(rand io.Reader, digest []byte, opts crypto.SignerOpts) ([]byte, error) {
return key.signer.Sign(rand, digest, opts)
}
func (key *fileKey) SignContext(ctx context.Context, digest []byte, opts crypto.SignerOpts) ([]byte, error) {
return key.signer.Sign(rand.Reader, digest, opts)
}
func (key *fileKey) Config() *config.KeyConfig {
return key.keyConf
}
func (key *fileKey) Certificate() []byte {
return key.cert
}
func (key *fileKey) GetID() []byte {
return nil
}
func (tok *fileToken) Import(keyName string, privKey crypto.PrivateKey) (token.Key, error) {
return nil, token.NotImplementedError{Op: "import-key", Type: tokenType}
}
func (tok *fileToken) ImportCertificate(cert *x509.Certificate, labelBase string) error {
return token.NotImplementedError{Op: "import-certificate", Type: tokenType}
}
func (tok *fileToken) Generate(keyName string, keyType token.KeyType, bits uint) (token.Key, error) {
// TODO - probably useful
return nil, token.NotImplementedError{Op: "generate-key", Type: tokenType}
}
func (key *fileKey) ImportCertificate(cert *x509.Certificate) error {
return token.NotImplementedError{Op: "import-certificate", Type: tokenType}
}
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