Commit fa460073 authored by Dmitry Eremin-Solenikov's avatar Dmitry Eremin-Solenikov Committed by Herbert Xu

crypto: cfb - fix decryption

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: default avatarDmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 7172122b
...@@ -144,7 +144,7 @@ static int crypto_cfb_decrypt_segment(struct skcipher_walk *walk, ...@@ -144,7 +144,7 @@ static int crypto_cfb_decrypt_segment(struct skcipher_walk *walk,
do { do {
crypto_cfb_encrypt_one(tfm, iv, dst); crypto_cfb_encrypt_one(tfm, iv, dst);
crypto_xor(dst, iv, bsize); crypto_xor(dst, src, bsize);
iv = src; iv = src;
src += bsize; src += bsize;
......
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