Simplify keys and IVs arguments passing: use slices instead of arrays

[gogost.git] / src / cypherpunks.ru / gogost / gost28147 / ctr.go

diff --git a/src/cypherpunks.ru/gogost/gost28147/ctr.go b/src/cypherpunks.ru/gogost/gost28147/ctr.go
index 1008707862d32f7d0b7cc530b99d995122202f62..19564f9ddb0595afee0aaa8d66ee730da618837c 100644 (file)
--- a/src/cypherpunks.ru/gogost/gost28147/ctr.go
+++ b/src/cypherpunks.ru/gogost/gost28147/ctr.go
@@ -22,8 +22,11 @@ type CTR struct {
        n2 nv
 }
 
-func (c *Cipher) NewCTR(iv [BlockSize]byte) *CTR {
-       n1, n2 := block2nvs(iv[:])
+func (c *Cipher) NewCTR(iv []byte) *CTR {
+       if len(iv) != BlockSize {
+               panic("iv length is not equal to blocksize")
+       }
+       n1, n2 := block2nvs(iv)
        n2, n1 = c.xcrypt(SeqEncrypt, n1, n2)
        return &CTR{c, n1, n2}
 }