Merge pull request #201 from Bytom/v0.1

[bytom/vapor.git] / vendor / github.com / tendermint / go-crypto / symmetric.go

diff --git a/vendor/github.com/tendermint/go-crypto/symmetric.go b/vendor/github.com/tendermint/go-crypto/symmetric.go
deleted file mode 100644 (file)
index d4ac9b5..0000000
--- a/vendor/github.com/tendermint/go-crypto/symmetric.go
+++ /dev/null
@@ -1,51 +0,0 @@
-package crypto
-
-import (
-       "errors"
-
-       . "github.com/tendermint/tmlibs/common"
-       "golang.org/x/crypto/nacl/secretbox"
-)
-
-const nonceLen = 24
-const secretLen = 32
-
-// secret must be 32 bytes long. Use something like Sha256(Bcrypt(passphrase))
-// The ciphertext is (secretbox.Overhead + 24) bytes longer than the plaintext.
-// NOTE: call crypto.MixEntropy() first.
-func EncryptSymmetric(plaintext []byte, secret []byte) (ciphertext []byte) {
-       if len(secret) != secretLen {
-               PanicSanity(Fmt("Secret must be 32 bytes long, got len %v", len(secret)))
-       }
-       nonce := CRandBytes(nonceLen)
-       nonceArr := [nonceLen]byte{}
-       copy(nonceArr[:], nonce)
-       secretArr := [secretLen]byte{}
-       copy(secretArr[:], secret)
-       ciphertext = make([]byte, nonceLen+secretbox.Overhead+len(plaintext))
-       copy(ciphertext, nonce)
-       secretbox.Seal(ciphertext[nonceLen:nonceLen], plaintext, &nonceArr, &secretArr)
-       return ciphertext
-}
-
-// secret must be 32 bytes long. Use something like Sha256(Bcrypt(passphrase))
-// The ciphertext is (secretbox.Overhead + 24) bytes longer than the plaintext.
-func DecryptSymmetric(ciphertext []byte, secret []byte) (plaintext []byte, err error) {
-       if len(secret) != secretLen {
-               PanicSanity(Fmt("Secret must be 32 bytes long, got len %v", len(secret)))
-       }
-       if len(ciphertext) <= secretbox.Overhead+nonceLen {
-               return nil, errors.New("Ciphertext is too short")
-       }
-       nonce := ciphertext[:nonceLen]
-       nonceArr := [nonceLen]byte{}
-       copy(nonceArr[:], nonce)
-       secretArr := [secretLen]byte{}
-       copy(secretArr[:], secret)
-       plaintext = make([]byte, len(ciphertext)-nonceLen-secretbox.Overhead)
-       _, ok := secretbox.Open(plaintext[:0], ciphertext[nonceLen:], &nonceArr, &secretArr)
-       if !ok {
-               return nil, errors.New("Ciphertext decryption failed")
-       }
-       return plaintext, nil
-}