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* Add keystore v4 * Remove keystore fixtures
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| package keystore | ||
|
|
||
| import ( | ||
| "crypto/aes" | ||
| "crypto/cipher" | ||
| "crypto/rand" | ||
| "crypto/sha256" | ||
| "encoding/hex" | ||
| "encoding/json" | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| "golang.org/x/crypto/pbkdf2" | ||
| "golang.org/x/crypto/scrypt" | ||
| ) | ||
|
|
||
| func getRand(size int) []byte { | ||
| buf := make([]byte, size) | ||
| rand.Read(buf) | ||
| return buf | ||
| } | ||
|
|
||
| type hexString []byte | ||
|
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| func (h hexString) MarshalJSON() ([]byte, error) { | ||
| str := "\"" + hex.EncodeToString(h) + "\"" | ||
| return []byte(str), nil | ||
| } | ||
|
|
||
| func (h *hexString) UnmarshalJSON(data []byte) error { | ||
| raw := string(data) | ||
| raw = strings.Trim(raw, "\"") | ||
|
|
||
| data, err := hex.DecodeString(raw) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| *h = data | ||
| return nil | ||
| } | ||
|
|
||
| func aesCTR(key, cipherText, iv []byte) ([]byte, error) { | ||
| block, err := aes.NewCipher(key) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| stream := cipher.NewCTR(block, iv) | ||
|
|
||
| dst := make([]byte, len(cipherText)) | ||
| stream.XORKeyStream(dst, cipherText) | ||
|
|
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| return dst, nil | ||
| } | ||
|
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| type pbkdf2Params struct { | ||
| Dklen int | ||
| Salt hexString | ||
| C int | ||
| Prf string | ||
| } | ||
|
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| func (p *pbkdf2Params) Key(password []byte) []byte { | ||
| return pbkdf2.Key(password, p.Salt, p.C, p.Dklen, sha256.New) | ||
| } | ||
|
|
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| type scryptParams struct { | ||
| Dklen int | ||
| Salt hexString | ||
| N int | ||
| P int | ||
| R int | ||
| } | ||
|
|
||
| func (s *scryptParams) Key(password []byte) ([]byte, error) { | ||
| return scrypt.Key(password, s.Salt, s.N, s.R, s.P, s.Dklen) | ||
| } | ||
|
|
||
| func applyKdf(fn string, password, paramsRaw []byte) ([]byte, error) { | ||
| var key []byte | ||
|
|
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| if fn == "pbkdf2" { | ||
| var params pbkdf2Params | ||
| if err := json.Unmarshal(paramsRaw, ¶ms); err != nil { | ||
| return nil, err | ||
| } | ||
| if params.Prf != "hmac-sha256" { | ||
| return nil, fmt.Errorf("not found") | ||
| } | ||
| key = params.Key(password) | ||
| } else if fn == "scrypt" { | ||
| var params scryptParams | ||
| err := json.Unmarshal(paramsRaw, ¶ms) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| key, err = params.Key(password) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } else { | ||
| return nil, fmt.Errorf("kdf '%s' not supported", fn) | ||
| } | ||
| return key, nil | ||
| } |
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