diff options
Diffstat (limited to 'src/pkg/crypto/cipher/ocfb.go')
| -rw-r--r-- | src/pkg/crypto/cipher/ocfb.go | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/pkg/crypto/cipher/ocfb.go b/src/pkg/crypto/cipher/ocfb.go index b2d877591..031e74a9d 100644 --- a/src/pkg/crypto/cipher/ocfb.go +++ b/src/pkg/crypto/cipher/ocfb.go @@ -80,9 +80,10 @@ type ocfbDecrypter struct { // NewOCFBDecrypter returns a Stream which decrypts data with OpenPGP's cipher // feedback mode using the given Block. Prefix must be the first blockSize + 2 // bytes of the ciphertext, where blockSize is the Block's block size. If an -// incorrect key is detected then nil is returned. Resync determines if the -// "resynchronization step" from RFC 4880, 13.9 step 7 is performed. Different -// parts of OpenPGP vary on this point. +// incorrect key is detected then nil is returned. On successful exit, +// blockSize+2 bytes of decrypted data are written into prefix. Resync +// determines if the "resynchronization step" from RFC 4880, 13.9 step 7 is +// performed. Different parts of OpenPGP vary on this point. func NewOCFBDecrypter(block Block, prefix []byte, resync OCFBResyncOption) Stream { blockSize := block.BlockSize() if len(prefix) != blockSize+2 { @@ -118,6 +119,7 @@ func NewOCFBDecrypter(block Block, prefix []byte, resync OCFBResyncOption) Strea x.fre[1] = prefix[blockSize+1] x.outUsed = 2 } + copy(prefix, prefixCopy) return x } |