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crypto: cfb - fix decryption

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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>
This commit is contained in:
Dmitry Eremin-Solenikov 2018-10-20 02:01:52 +03:00 committed by Herbert Xu
parent 7172122be6
commit fa4600734b
1 changed files with 1 additions and 1 deletions
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crypto/cfb.c
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@ -144,7 +144,7 @@ static int crypto_cfb_decrypt_segment(struct skcipher_walk *walk,
do {
crypto_cfb_encrypt_one(tfm, iv, dst);
crypto_xor(dst, iv, bsize);
crypto_xor(dst, src, bsize);
iv = src;
src += bsize;