Commit fa460073 authored Oct 20, 2018 by Dmitry Eremin-Solenikov Committed by Herbert Xu Nov 09, 2018

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: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

parent 7172122b

crypto/cfb.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;