| From fa4600734b74f74d9169c3015946d4722f8bcf79 Mon Sep 17 00:00:00 2001 |
| From: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> |
| Date: Sat, 20 Oct 2018 02:01:52 +0300 |
| Subject: crypto: cfb - fix decryption |
| |
| From: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> |
| |
| commit fa4600734b74f74d9169c3015946d4722f8bcf79 upstream. |
| |
| crypto_cfb_decrypt_segment() incorrectly XOR'ed generated keystream with |
| IV, rather than with data stream, resulting in incorrect decryption. |
| Test vectors will be added in the next patch. |
| |
| Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> |
| Cc: stable@vger.kernel.org |
| Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| crypto/cfb.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/crypto/cfb.c |
| +++ b/crypto/cfb.c |
| @@ -144,7 +144,7 @@ static int crypto_cfb_decrypt_segment(st |
| |
| do { |
| crypto_cfb_encrypt_one(tfm, iv, dst); |
| - crypto_xor(dst, iv, bsize); |
| + crypto_xor(dst, src, bsize); |
| iv = src; |
| |
| src += bsize; |
