Moves files

internal/buffer.go

@@ -0,0 +1,21 @@
+package restic
+
+import "restic/crypto"
+
+// NewBlobBuffer returns a buffer that is large enough to hold a blob of size
+// plaintext bytes, including the crypto overhead.
+func NewBlobBuffer(size int) []byte {
+	return make([]byte, size, size+crypto.Extension)
+}
+
+// PlaintextLength returns the plaintext length of a blob with ciphertextSize
+// bytes.
+func PlaintextLength(ciphertextSize int) int {
+	return ciphertextSize - crypto.Extension
+}
+
+// CiphertextLength returns the encrypted length of a blob with plaintextSize
+// bytes.
+func CiphertextLength(plaintextSize int) int {
+	return plaintextSize + crypto.Extension
+}