crypto: eseqiv - Fix IV generation for sync algorithms

If crypto_ablkcipher_encrypt() returns synchronous, eseqiv_complete2() is called even if req->giv is already the pointer to the generated IV. The generated IV is overwritten with some random data in this case. This patch fixes this by calling eseqiv_complete2() just if the generated IV has to be copied to req->giv. Signed-off-by: Steffen Klassert <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
josf · Apr 15, 2009 · abe5fa7 · abe5fa7
1 parent 295c01f
commit abe5fa7
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/crypto/eseqiv.c b/crypto/eseqiv.c
@@ -153,7 +153,8 @@ static int eseqiv_givencrypt(struct skcipher_givcrypt_request *req)
 	if (err)
 		goto out;
 
-	eseqiv_complete2(req);
+	if (giv != req->giv)
+		eseqiv_complete2(req);
 
 out:
 	return err;