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Diffstat (limited to 'src/pkg/crypto/cipher/ctr.go')
| -rw-r--r-- | src/pkg/crypto/cipher/ctr.go | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/pkg/crypto/cipher/ctr.go b/src/pkg/crypto/cipher/ctr.go index 04436ec23..147b74fc2 100644 --- a/src/pkg/crypto/cipher/ctr.go +++ b/src/pkg/crypto/cipher/ctr.go @@ -22,6 +22,10 @@ type ctr struct { // NewCTR returns a Stream which encrypts/decrypts using the given Block in // counter mode. The length of iv must be the same as the Block's block size. func NewCTR(block Block, iv []byte) Stream { + if len(iv) != block.BlockSize() { + panic("cipher.NewCTR: iv length must equal block size") + } + return &ctr{ b: block, ctr: dup(iv), |