diff options
Diffstat (limited to 'src/pkg/crypto/rc4/rc4.go')
| -rw-r--r-- | src/pkg/crypto/rc4/rc4.go | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/pkg/crypto/rc4/rc4.go b/src/pkg/crypto/rc4/rc4.go index e47a01513..65fd195f3 100644 --- a/src/pkg/crypto/rc4/rc4.go +++ b/src/pkg/crypto/rc4/rc4.go @@ -45,14 +45,14 @@ func NewCipher(key []byte) (*Cipher, os.Error) { return &c, nil } -// XORKeyStream will XOR each byte of the given buffer with a byte of the -// generated keystream. -func (c *Cipher) XORKeyStream(buf []byte) { - for i := range buf { +// XORKeyStream sets dst to the result of XORing src with the key stream. +// Dst and src may be the same slice but otherwise should not overlap. +func (c *Cipher) XORKeyStream(dst, src []byte) { + for i := range src { c.i += 1 c.j += c.s[c.i] c.s[c.i], c.s[c.j] = c.s[c.j], c.s[c.i] - buf[i] ^= c.s[c.s[c.i]+c.s[c.j]] + dst[i] = src[i] ^ c.s[c.s[c.i]+c.s[c.j]] } } |