diff options
| -rw-r--r-- | crypto/arc4.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/crypto/arc4.c b/crypto/arc4.c index 2150f94e7d03..1a4825c97c5a 100644 --- a/crypto/arc4.c +++ b/crypto/arc4.c @@ -14,6 +14,8 @@ #include <linux/module.h> #include <linux/sched.h> +#define ARC4_ALIGN __alignof__(struct arc4_ctx) + static int crypto_arc4_setkey(struct crypto_lskcipher *tfm, const u8 *in_key, unsigned int key_len) { @@ -23,10 +25,15 @@ static int crypto_arc4_setkey(struct crypto_lskcipher *tfm, const u8 *in_key, } static int crypto_arc4_crypt(struct crypto_lskcipher *tfm, const u8 *src, - u8 *dst, unsigned nbytes, u8 *iv, u32 flags) + u8 *dst, unsigned nbytes, u8 *siv, u32 flags) { struct arc4_ctx *ctx = crypto_lskcipher_ctx(tfm); + if (!(flags & CRYPTO_LSKCIPHER_FLAG_CONT)) + memcpy(siv, ctx, sizeof(*ctx)); + + ctx = (struct arc4_ctx *)siv; + arc4_crypt(ctx, dst, src, nbytes); return 0; } @@ -45,9 +52,11 @@ static struct lskcipher_alg arc4_alg = { .co.base.cra_priority = 100, .co.base.cra_blocksize = ARC4_BLOCK_SIZE, .co.base.cra_ctxsize = sizeof(struct arc4_ctx), + .co.base.cra_alignmask = ARC4_ALIGN - 1, .co.base.cra_module = THIS_MODULE, .co.min_keysize = ARC4_MIN_KEY_SIZE, .co.max_keysize = ARC4_MAX_KEY_SIZE, + .co.statesize = sizeof(struct arc4_ctx), .setkey = crypto_arc4_setkey, .encrypt = crypto_arc4_crypt, .decrypt = crypto_arc4_crypt, |