diff options
Diffstat (limited to 'crypto/crypto.go')
| -rw-r--r-- | crypto/crypto.go | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/crypto/crypto.go b/crypto/crypto.go index cd0e4e101..b24d08010 100644 --- a/crypto/crypto.go +++ b/crypto/crypto.go @@ -17,8 +17,6 @@ package crypto import ( - "crypto/aes" - "crypto/cipher" "crypto/ecdsa" "crypto/elliptic" "crypto/rand" @@ -30,7 +28,6 @@ import ( "os" "encoding/hex" - "encoding/json" "errors" "github.com/ethereum/go-ethereum/common" @@ -38,8 +35,6 @@ import ( "github.com/ethereum/go-ethereum/crypto/secp256k1" "github.com/ethereum/go-ethereum/crypto/sha3" "github.com/ethereum/go-ethereum/rlp" - "github.com/pborman/uuid" - "golang.org/x/crypto/pbkdf2" "golang.org/x/crypto/ripemd160" ) @@ -217,107 +212,6 @@ func Decrypt(prv *ecdsa.PrivateKey, ct []byte) ([]byte, error) { return key.Decrypt(rand.Reader, ct, nil, nil) } -// creates a Key and stores that in the given KeyStore by decrypting a presale key JSON -func ImportPreSaleKey(keyStore KeyStore, keyJSON []byte, password string) (*Key, error) { - key, err := decryptPreSaleKey(keyJSON, password) - if err != nil { - return nil, err - } - key.Id = uuid.NewRandom() - err = keyStore.StoreKey(key, password) - return key, err -} - -func decryptPreSaleKey(fileContent []byte, password string) (key *Key, err error) { - preSaleKeyStruct := struct { - EncSeed string - EthAddr string - Email string - BtcAddr string - }{} - err = json.Unmarshal(fileContent, &preSaleKeyStruct) - if err != nil { - return nil, err - } - encSeedBytes, err := hex.DecodeString(preSaleKeyStruct.EncSeed) - iv := encSeedBytes[:16] - cipherText := encSeedBytes[16:] - /* - See https://github.com/ethereum/pyethsaletool - - pyethsaletool generates the encryption key from password by - 2000 rounds of PBKDF2 with HMAC-SHA-256 using password as salt (:(). - 16 byte key length within PBKDF2 and resulting key is used as AES key - */ - passBytes := []byte(password) - derivedKey := pbkdf2.Key(passBytes, passBytes, 2000, 16, sha256.New) - plainText, err := aesCBCDecrypt(derivedKey, cipherText, iv) - if err != nil { - return nil, err - } - ethPriv := Keccak256(plainText) - ecKey := ToECDSA(ethPriv) - key = &Key{ - Id: nil, - Address: PubkeyToAddress(ecKey.PublicKey), - PrivateKey: ecKey, - } - derivedAddr := hex.EncodeToString(key.Address.Bytes()) // needed because .Hex() gives leading "0x" - expectedAddr := preSaleKeyStruct.EthAddr - if derivedAddr != expectedAddr { - err = fmt.Errorf("decrypted addr '%s' not equal to expected addr '%s'", derivedAddr, expectedAddr) - } - return key, err -} - -// AES-128 is selected due to size of encryptKey -func aesCTRXOR(key, inText, iv []byte) ([]byte, error) { - aesBlock, err := aes.NewCipher(key) - if err != nil { - return nil, err - } - stream := cipher.NewCTR(aesBlock, iv) - outText := make([]byte, len(inText)) - stream.XORKeyStream(outText, inText) - return outText, err -} - -func aesCBCDecrypt(key, cipherText, iv []byte) ([]byte, error) { - aesBlock, err := aes.NewCipher(key) - if err != nil { - return nil, err - } - decrypter := cipher.NewCBCDecrypter(aesBlock, iv) - paddedPlaintext := make([]byte, len(cipherText)) - decrypter.CryptBlocks(paddedPlaintext, cipherText) - plaintext := PKCS7Unpad(paddedPlaintext) - if plaintext == nil { - err = errors.New("Decryption failed: PKCS7Unpad failed after AES decryption") - } - return plaintext, err -} - -// From https://leanpub.com/gocrypto/read#leanpub-auto-block-cipher-modes -func PKCS7Unpad(in []byte) []byte { - if len(in) == 0 { - return nil - } - - padding := in[len(in)-1] - if int(padding) > len(in) || padding > aes.BlockSize { - return nil - } else if padding == 0 { - return nil - } - - for i := len(in) - 1; i > len(in)-int(padding)-1; i-- { - if in[i] != padding { - return nil - } - } - return in[:len(in)-int(padding)] -} - func PubkeyToAddress(p ecdsa.PublicKey) common.Address { pubBytes := FromECDSAPub(&p) return common.BytesToAddress(Keccak256(pubBytes[1:])[12:]) |